ChangeLog 1.6 MB

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  1. Changes in version 0.4.2.5 - 2019-12-09
  2. This is the first stable release in the 0.4.2.x series. This series
  3. improves reliability and stability, and includes several stability and
  4. correctness improvements for onion services. It also fixes many smaller
  5. bugs present in previous series.
  6. Per our support policy, we will support the 0.4.2.x series for nine
  7. months, or until three months after the release of a stable 0.4.3.x:
  8. whichever is longer. If you need longer-term support, please stick
  9. with 0.3.5.x, which will we plan to support until Feb 2022.
  10. Per our support policy, we will support the 0.4.2.x series for nine
  11. months, or until three months after the release of a stable 0.4.3.x:
  12. whichever is longer. If you need longer-term support, please stick
  13. with 0.3.5.x, which will we plan to support until Feb 2022.
  14. Below are the changes since 0.4.1.4-rc. For a complete list of changes
  15. since 0.4.1.5, see the ReleaseNotes file.
  16. o Minor features (geoip):
  17. - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
  18. Country database. Closes ticket 32685.
  19. o Testing:
  20. - Require C99 standards-conforming code in Travis CI, but allow GNU
  21. gcc extensions. Also activates clang's -Wtypedef-redefinition
  22. warnings. Build some jobs with -std=gnu99, and some jobs without.
  23. Closes ticket 32500.
  24. Changes in version 0.4.2.4-rc - 2019-11-15
  25. Tor 0.4.2.4-rc is the first release candidate in its series. It fixes
  26. several bugs from earlier versions, including a few that would result in
  27. stack traces or incorrect behavior.
  28. o Minor features (build system):
  29. - Make pkg-config use --prefix when cross-compiling, if
  30. PKG_CONFIG_PATH is not set. Closes ticket 32191.
  31. o Minor features (geoip):
  32. - Update geoip and geoip6 to the November 6 2019 Maxmind GeoLite2
  33. Country database. Closes ticket 32440.
  34. o Minor bugfixes (client, onion service v3):
  35. - Fix a BUG() assertion that occurs within a very small race window
  36. between when a client intro circuit opens and when its descriptor
  37. gets cleaned up from the cache. The circuit is now closed early,
  38. which will trigger a re-fetch of the descriptor and continue the
  39. connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
  40. o Minor bugfixes (code quality):
  41. - Fix "make check-includes" so it runs correctly on out-of-tree
  42. builds. Fixes bug 31335; bugfix on 0.3.5.1-alpha.
  43. o Minor bugfixes (configuration):
  44. - Log the option name when skipping an obsolete option. Fixes bug
  45. 32295; bugfix on 0.4.2.1-alpha.
  46. o Minor bugfixes (crash):
  47. - When running Tor with an option like --verify-config or
  48. --dump-config that does not start the event loop, avoid crashing
  49. if we try to exit early because of an error. Fixes bug 32407;
  50. bugfix on 0.3.3.1-alpha.
  51. o Minor bugfixes (directory):
  52. - When checking if a directory connection is anonymous, test if the
  53. circuit was marked for close before looking at its channel. This
  54. avoids a BUG() stacktrace if the circuit was previously closed.
  55. Fixes bug 31958; bugfix on 0.4.2.1-alpha.
  56. o Minor bugfixes (shellcheck):
  57. - Fix minor shellcheck errors in the git-*.sh scripts. Fixes bug
  58. 32402; bugfix on 0.4.2.1-alpha.
  59. - Start checking most scripts for shellcheck errors again. Fixes bug
  60. 32402; bugfix on 0.4.2.1-alpha.
  61. o Testing (continuous integration):
  62. - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
  63. recent version of coccinelle. But leave chutney on Ubuntu Trusty,
  64. until we can fix some Bionic permissions issues (see ticket
  65. 32240). Related to ticket 31919.
  66. - Install the mingw OpenSSL package in Appveyor. This makes sure
  67. that the OpenSSL headers and libraries match in Tor's Appveyor
  68. builds. (This bug was triggered by an Appveyor image update.)
  69. Fixes bug 32449; bugfix on 0.3.5.6-rc.
  70. - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
  71. Changes in version 0.4.2.3-alpha - 2019-10-24
  72. This release fixes several bugs from the previous alpha release, and
  73. from earlier versions of Tor.
  74. o Major bugfixes (relay):
  75. - Relays now respect their AccountingMax bandwidth again. When
  76. relays entered "soft" hibernation (which typically starts when
  77. we've hit 90% of our AccountingMax), we had stopped checking
  78. whether we should enter hard hibernation. Soft hibernation refuses
  79. new connections and new circuits, but the existing circuits can
  80. continue, meaning that relays could have exceeded their configured
  81. AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
  82. o Major bugfixes (v3 onion services):
  83. - Onion services now always use the exact number of intro points
  84. configured with the HiddenServiceNumIntroductionPoints option (or
  85. fewer if nodes are excluded). Before, a service could sometimes
  86. pick more intro points than configured. Fixes bug 31548; bugfix
  87. on 0.3.2.1-alpha.
  88. o Minor feature (onion services, control port):
  89. - The ADD_ONION command's keyword "BEST" now defaults to ED25519-V3
  90. (v3) onion services. Previously it defaulted to RSA1024 (v2).
  91. Closes ticket 29669.
  92. o Minor features (testing):
  93. - When running tests that attempt to look up hostnames, replace the
  94. libc name lookup functions with ones that do not actually touch
  95. the network. This way, the tests complete more quickly in the
  96. presence of a slow or missing DNS resolver. Closes ticket 31841.
  97. o Minor features (testing, continuous integration):
  98. - Disable all but one Travis CI macOS build, to mitigate slow
  99. scheduling of Travis macOS jobs. Closes ticket 32177.
  100. - Run the chutney IPv6 networks as part of Travis CI. Closes
  101. ticket 30860.
  102. - Simplify the Travis CI build matrix, and optimise for build time.
  103. Closes ticket 31859.
  104. - Use Windows Server 2019 instead of Windows Server 2016 in our
  105. Appveyor builds. Closes ticket 32086.
  106. o Minor bugfixes (build system):
  107. - Interpret "--disable-module-dirauth=no" correctly. Fixes bug
  108. 32124; bugfix on 0.3.4.1-alpha.
  109. - Interpret "--with-tcmalloc=no" correctly. Fixes bug 32124; bugfix
  110. on 0.2.0.20-rc.
  111. - Stop failing when jemalloc is requested, but tcmalloc is not
  112. found. Fixes bug 32124; bugfix on 0.3.5.1-alpha.
  113. - When pkg-config is not installed, or a library that depends on
  114. pkg-config is not found, tell the user what to do to fix the
  115. problem. Fixes bug 31922; bugfix on 0.3.1.1-alpha.
  116. o Minor bugfixes (connections):
  117. - Avoid trying to read data from closed connections, which can cause
  118. needless loops in Libevent and infinite loops in Shadow. Fixes bug
  119. 30344; bugfix on 0.1.1.1-alpha.
  120. o Minor bugfixes (error handling):
  121. - Always lock the backtrace buffer before it is used. Fixes bug
  122. 31734; bugfix on 0.2.5.3-alpha.
  123. o Minor bugfixes (mainloop, periodic events, in-process API):
  124. - Reset the periodic events' "enabled" flag when Tor is shut down
  125. cleanly. Previously, this flag was left on, which caused periodic
  126. events not to be re-enabled when Tor was relaunched in-process
  127. with tor_api.h after a shutdown. Fixes bug 32058; bugfix
  128. on 0.3.3.1-alpha.
  129. o Minor bugfixes (process management):
  130. - Remove overly strict assertions that triggered when a pluggable
  131. transport failed to launch. Fixes bug 31091; bugfix
  132. on 0.4.0.1-alpha.
  133. - Remove an assertion in the Unix process backend. This assertion
  134. would trigger when we failed to find the executable for a child
  135. process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
  136. o Minor bugfixes (testing):
  137. - Avoid intermittent test failures due to a test that had relied on
  138. inconsistent timing sources. Fixes bug 31995; bugfix
  139. on 0.3.1.3-alpha.
  140. - When testing port rebinding, don't busy-wait for tor to log.
  141. Instead, actually sleep for a short time before polling again.
  142. Also improve the formatting of control commands and log messages.
  143. Fixes bug 31837; bugfix on 0.3.5.1-alpha.
  144. o Minor bugfixes (tls, logging):
  145. - Log bugs about the TLS read buffer's length only once, rather than
  146. filling the logs with similar warnings. Fixes bug 31939; bugfix
  147. on 0.3.0.4-rc.
  148. o Minor bugfixes (v3 onion services):
  149. - Fix an implicit conversion from ssize_t to size_t discovered by
  150. Coverity. Fixes bug 31682; bugfix on 0.4.2.1-alpha.
  151. - Fix a memory leak in an unlikely error code path when encoding HS
  152. DoS establish intro extension cell. Fixes bug 32063; bugfix
  153. on 0.4.2.1-alpha.
  154. - When cleaning up intro circuits for a v3 onion service, don't
  155. remove circuits that have an established or pending circuit, even
  156. if they ran out of retries. This way, we don't remove a circuit on
  157. its last retry. Fixes bug 31652; bugfix on 0.3.2.1-alpha.
  158. o Documentation:
  159. - Correct the description of "GuardLifetime". Fixes bug 31189;
  160. bugfix on 0.3.0.1-alpha.
  161. - Make clear in the man page, in both the bandwidth section and the
  162. AccountingMax section, that Tor counts in powers of two, not
  163. powers of ten: 1 GByte is 1024*1024*1024 bytes, not one billion
  164. bytes. Resolves ticket 32106.
  165. Changes in version 0.4.2.2-alpha - 2019-10-07
  166. This release fixes several bugs from the previous alpha release, and
  167. from earlier versions. It also includes a change in authorities, so
  168. that they begin to reject the currently unsupported release series.
  169. o Major features (directory authorities):
  170. - Directory authorities now reject relays running all currently
  171. deprecated release series. The currently supported release series
  172. are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.
  173. o Major bugfixes (embedded Tor):
  174. - Avoid a possible crash when restarting Tor in embedded mode and
  175. enabling a different set of publish/subscribe messages. Fixes bug
  176. 31898; bugfix on 0.4.1.1-alpha.
  177. o Major bugfixes (torrc parsing):
  178. - Stop ignoring torrc options after an %include directive, when the
  179. included directory ends with a file that does not contain any
  180. config options (but does contain comments or whitespace). Fixes
  181. bug 31408; bugfix on 0.3.1.1-alpha.
  182. o Minor features (auto-formatting scripts):
  183. - When annotating C macros, never generate a line that our check-
  184. spaces script would reject. Closes ticket 31759.
  185. - When annotating C macros, try to remove cases of double-negation.
  186. Closes ticket 31779.
  187. o Minor features (continuous integration):
  188. - When building on Appveyor and Travis, pass the "-k" flag to make,
  189. so that we are informed of all compilation failures, not just the
  190. first one or two. Closes ticket 31372.
  191. o Minor features (geoip):
  192. - Update geoip and geoip6 to the October 1 2019 Maxmind GeoLite2
  193. Country database. Closes ticket 31931.
  194. o Minor features (maintenance scripts):
  195. - Add a Coccinelle script to detect bugs caused by incrementing or
  196. decrementing a variable inside a call to log_debug(). Since
  197. log_debug() is a macro whose arguments are conditionally
  198. evaluated, it is usually an error to do this. One such bug was
  199. 30628, in which SENDME cells were miscounted by a decrement
  200. operator inside a log_debug() call. Closes ticket 30743.
  201. o Minor features (onion services v3):
  202. - Assist users who try to setup v2 client authorization in v3 onion
  203. services by pointing them to the right documentation. Closes
  204. ticket 28966.
  205. o Minor bugfixes (Appveyor continuous integration):
  206. - Avoid spurious errors when Appveyor CI fails before the install
  207. step. Fixes bug 31884; bugfix on 0.3.4.2-alpha.
  208. o Minor bugfixes (best practices tracker):
  209. - When listing overbroad exceptions, do not also list problems, and
  210. do not list insufficiently broad exceptions. Fixes bug 31338;
  211. bugfix on 0.4.2.1-alpha.
  212. o Minor bugfixes (controller protocol):
  213. - Fix the MAPADDRESS controller command to accept one or more
  214. arguments. Previously, it required two or more arguments, and
  215. ignored the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.
  216. o Minor bugfixes (logging):
  217. - Add a missing check for HAVE_PTHREAD_H, because the backtrace code
  218. uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha.
  219. - Disable backtrace signal handlers when shutting down tor. Fixes
  220. bug 31614; bugfix on 0.2.5.2-alpha.
  221. - Rate-limit our the logging message about the obsolete .exit
  222. notation. Previously, there was no limit on this warning, which
  223. could potentially be triggered many times by a hostile website.
  224. Fixes bug 31466; bugfix on 0.2.2.1-alpha.
  225. - When initialising log domain masks, only set known log domains.
  226. Fixes bug 31854; bugfix on 0.2.1.1-alpha.
  227. o Minor bugfixes (logging, protocol violations):
  228. - Do not log a nonfatal assertion failure when receiving a VERSIONS
  229. cell on a connection using the obsolete v1 link protocol. Log a
  230. protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
  231. o Minor bugfixes (modules):
  232. - Explain what the optional Directory Authority module is, and what
  233. happens when it is disabled. Fixes bug 31825; bugfix
  234. on 0.3.4.1-alpha.
  235. o Minor bugfixes (multithreading):
  236. - Avoid some undefined behaviour when freeing mutexes. Fixes bug
  237. 31736; bugfix on 0.0.7.
  238. o Minor bugfixes (relay):
  239. - Avoid crashing when starting with a corrupt keys directory where
  240. the old ntor key and the new ntor key are identical. Fixes bug
  241. 30916; bugfix on 0.2.4.8-alpha.
  242. o Minor bugfixes (tests, SunOS):
  243. - Avoid a map_anon_nofork test failure due to a signed/unsigned
  244. integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha.
  245. o Code simplification and refactoring:
  246. - Refactor connection_control_process_inbuf() to reduce the size of
  247. a practracker exception. Closes ticket 31840.
  248. - Refactor the microdescs_parse_from_string() function into smaller
  249. pieces, for better comprehensibility. Closes ticket 31675.
  250. - Use SEVERITY_MASK_IDX() to find the LOG_* mask indexes in the unit
  251. tests and fuzzers, rather than using hard-coded values. Closes
  252. ticket 31334.
  253. - Interface for function `decrypt_desc_layer` cleaned up. Closes
  254. ticket 31589.
  255. o Documentation:
  256. - Document the signal-safe logging behaviour in the tor man page.
  257. Also add some comments to the relevant functions. Closes
  258. ticket 31839.
  259. - Explain why we can't destroy the backtrace buffer mutex. Explain
  260. why we don't need to destroy the log mutex. Closes ticket 31736.
  261. - The Tor source code repository now includes a (somewhat dated)
  262. description of Tor's modular architecture, in doc/HACKING/design.
  263. This is based on the old "tor-guts.git" repository, which we are
  264. adopting and superseding. Closes ticket 31849.
  265. Changes in version 0.4.1.6 - 2019-09-19
  266. This release backports several bugfixes to improve stability and
  267. correctness. Anyone experiencing build problems or crashes with 0.4.1.5,
  268. or experiencing reliability issues with single onion services, should
  269. upgrade.
  270. o Major bugfixes (crash, Linux, Android, backport from 0.4.2.1-alpha):
  271. - Tolerate systems (including some Android installations) where
  272. madvise and MADV_DONTDUMP are available at build-time, but not at
  273. run time. Previously, these systems would notice a failed syscall
  274. and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
  275. - Tolerate systems (including some Linux installations) where
  276. madvise and/or MADV_DONTFORK are available at build-time, but not
  277. at run time. Previously, these systems would notice a failed
  278. syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.
  279. o Minor features (stem tests, backport from 0.4.2.1-alpha):
  280. - Change "make test-stem" so it only runs the stem tests that use
  281. tor. This change makes test-stem faster and more reliable. Closes
  282. ticket 31554.
  283. o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
  284. - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
  285. systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
  286. o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
  287. - Add more stub functions to fix compilation on Android with link-
  288. time optimization when --disable-module-dirauth is used.
  289. Previously, these compilation settings would make the compiler
  290. look for functions that didn't exist. Fixes bug 31552; bugfix
  291. on 0.4.1.1-alpha.
  292. - Suppress spurious float-conversion warnings from GCC when calling
  293. floating-point classifier functions on FreeBSD. Fixes part of bug
  294. 31687; bugfix on 0.3.1.5-alpha.
  295. o Minor bugfixes (controller protocol):
  296. - Fix the MAPADDRESS controller command to accept one or more
  297. arguments. Previously, it required two or more arguments, and ignored
  298. the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.
  299. o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
  300. - When tor is missing descriptors for some primary entry guards,
  301. make the log message less alarming. It's normal for descriptors to
  302. expire, as long as tor fetches new ones soon after. Fixes bug
  303. 31657; bugfix on 0.3.3.1-alpha.
  304. o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
  305. - Change log level of message "Hash of session info was not as
  306. expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
  307. on 0.1.1.10-alpha.
  308. o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
  309. - Correctly exclude a redundant rust build job in Travis. Fixes bug
  310. 31463; bugfix on 0.3.5.4-alpha.
  311. o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
  312. - Always retry v2 single onion service intro and rend circuits with
  313. a 3-hop path. Previously, v2 single onion services used a 3-hop
  314. path when rendezvous circuits were retried after a remote or
  315. delayed failure, but a 1-hop path for immediate retries. Fixes bug
  316. 23818; bugfix on 0.2.9.3-alpha.
  317. o Minor bugfixes (v3 single onion services, backport from 0.4.2.1-alpha):
  318. - Always retry v3 single onion service intro and rend circuits with
  319. a 3-hop path. Previously, v3 single onion services used a 3-hop
  320. path when rend circuits were retried after a remote or delayed
  321. failure, but a 1-hop path for immediate retries. Fixes bug 23818;
  322. bugfix on 0.3.2.1-alpha.
  323. - Make v3 single onion services fall back to a 3-hop intro, when all
  324. intro points are unreachable via a 1-hop path. Previously, v3
  325. single onion services failed when all intro nodes were unreachable
  326. via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
  327. o Documentation (backport from 0.4.2.1-alpha):
  328. - Use RFC 2397 data URL scheme to embed an image into tor-exit-
  329. notice.html so that operators no longer have to host it
  330. themselves. Closes ticket 31089.
  331. Changes in version 0.4.2.1-alpha - 2019-09-17
  332. This is the first alpha release in the 0.4.2.x series. It adds new
  333. defenses for denial-of-service attacks against onion services. It also
  334. includes numerous kinds of bugfixes and refactoring to help improve
  335. Tor's stability and ease of development.
  336. o Major features (onion service v3, denial of service):
  337. - Add onion service introduction denial of service defenses. Intro
  338. points can now rate-limit client introduction requests, using
  339. parameters that can be sent by the service within the
  340. ESTABLISH_INTRO cell. If the cell extension for this is not used,
  341. the intro point will honor the consensus parameters. Closes
  342. ticket 30924.
  343. o Major bugfixes (circuit build, guard):
  344. - When considering upgrading circuits from "waiting for guard" to
  345. "open", always ignore circuits that are marked for close.
  346. Previously we could end up in the situation where a subsystem is
  347. notified of a circuit opening, but the circuit is still marked for
  348. close, leading to undesirable behavior. Fixes bug 30871; bugfix
  349. on 0.3.0.1-alpha.
  350. o Major bugfixes (crash, Linux, Android):
  351. - Tolerate systems (including some Android installations) where
  352. madvise and MADV_DONTDUMP are available at build-time, but not at
  353. run time. Previously, these systems would notice a failed syscall
  354. and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
  355. - Tolerate systems (including some Linux installations) where
  356. madvise and/or MADV_DONTFORK are available at build-time, but not
  357. at run time. Previously, these systems would notice a failed
  358. syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.
  359. o Minor features (best practices tracker):
  360. - Our best-practices tracker now integrates with our include-checker
  361. tool to keep track of how many layering violations we have not yet
  362. fixed. We hope to reduce this number over time to improve Tor's
  363. modularity. Closes ticket 31176.
  364. - Add a TOR_PRACTRACKER_OPTIONS variable for passing arguments to
  365. practracker from the environment. We may want this for continuous
  366. integration. Closes ticket 31309.
  367. - Give a warning rather than an error when a practracker exception
  368. is violated by a small amount, add a --list-overbroad option to
  369. practracker that lists exceptions that are stricter than they need
  370. to be, and provide an environment variable for disabling
  371. practracker. Closes ticket 30752.
  372. - Our best-practices tracker now looks at headers as well as C
  373. files. Closes ticket 31175.
  374. o Minor features (build system):
  375. - Add --disable-manpage and --disable-html-manual options to
  376. configure script. This will enable shortening build times by not
  377. building documentation. Resolves issue 19381.
  378. o Minor features (compilation):
  379. - Log a more useful error message when we are compiling and one of
  380. the compile-time hardening options we have selected can be linked
  381. but not executed. Closes ticket 27530.
  382. o Minor features (configuration):
  383. - The configuration code has been extended to allow splitting
  384. configuration data across multiple objects. Previously, all
  385. configuration data needed to be kept in a single object, which
  386. tended to become bloated. Closes ticket 31240.
  387. o Minor features (continuous integration):
  388. - When running CI builds on Travis, put some random data in
  389. ~/.torrc, to make sure no tests are reading the Tor configuration
  390. file from its default location. Resolves issue 30102.
  391. o Minor features (debugging):
  392. - Log a nonfatal assertion failure if we encounter a configuration
  393. line whose command is "CLEAR" but which has a nonempty value. This
  394. should be impossible, according to the rules of our configuration
  395. line parsing. Closes ticket 31529.
  396. o Minor features (git hooks):
  397. - Our pre-commit git hook now checks for a special file before
  398. running practracker, so that practracker only runs on branches
  399. that are based on master. Since the pre-push hook calls the pre-
  400. commit hook, practracker will also only run before pushes of
  401. branches based on master. Closes ticket 30979.
  402. o Minor features (git scripts):
  403. - Add a "--" command-line argument, to separate git-push-all.sh
  404. script arguments from arguments that are passed through to git
  405. push. Closes ticket 31314.
  406. - Add a -r <remote-name> argument to git-push-all.sh, so the script
  407. can push test branches to a personal remote. Closes ticket 31314.
  408. - Add a -t <test-branch-prefix> argument to git-merge-forward.sh and
  409. git-push-all.sh, which makes these scripts create, merge forward,
  410. and push test branches. Closes ticket 31314.
  411. - Add a -u argument to git-merge-forward.sh, so that the script can
  412. re-use existing test branches after a merge failure and fix.
  413. Closes ticket 31314.
  414. - Add a TOR_GIT_PUSH env var, which sets the default git push
  415. command and arguments for git-push-all.sh. Closes ticket 31314.
  416. - Add a TOR_PUSH_DELAY variable to git-push-all.sh, which makes the
  417. script push master and maint branches with a delay between each
  418. branch. These delays trigger the CI jobs in a set order, which
  419. should show the most likely failures first. Also make pushes
  420. atomic by default, and make the script pass any command-line
  421. arguments to git push. Closes ticket 29879.
  422. - Call the shellcheck script from the pre-commit hook. Closes
  423. ticket 30967.
  424. - Skip pushing test branches that are the same as a remote
  425. maint/release/master branch in git-push-all.sh by default. Add a
  426. -s argument, so git-push-all.sh can push all test branches. Closes
  427. ticket 31314.
  428. o Minor features (IPv6, logging):
  429. - Log IPv6 addresses as well as IPv4 addresses when describing
  430. routerinfos, routerstatuses, and nodes. Closes ticket 21003.
  431. o Minor features (onion service v3):
  432. - Do not allow single hop clients to fetch or post an HS descriptor
  433. from an HSDir. Closes ticket 24964.
  434. o Minor features (onion service):
  435. - Disallow single-hop clients at the introduction point. We've
  436. removed Tor2web support a while back and single-hop rendezvous
  437. attempts are blocked at the relays. This change should remove load
  438. off the network from spammy clients. Close ticket 24963.
  439. o Minor features (stem tests):
  440. - Change "make test-stem" so it only runs the stem tests that use
  441. tor. This change makes test-stem faster and more reliable. Closes
  442. ticket 31554.
  443. o Minor features (testing):
  444. - Add a script to invoke "tor --dump-config" and "tor
  445. --verify-config" with various configuration options, and see
  446. whether tor's resulting configuration or error messages are what
  447. we expect. Use it for integration testing of our +Option and
  448. /Option flags. Closes ticket 31637.
  449. - Improve test coverage for our existing configuration parsing and
  450. management API. Closes ticket 30893.
  451. - Add integration tests to make sure that practracker gives the
  452. outputs we expect. Closes ticket 31477.
  453. - The practracker self-tests are now run as part of the Tor test
  454. suite. Closes ticket 31304.
  455. o Minor features (token bucket):
  456. - Implement a generic token bucket that uses a single counter, for
  457. use in anti-DoS onion service work. Closes ticket 30687.
  458. o Minor bugfixes (best practices tracker):
  459. - Fix a few issues in the best-practices script, including tests,
  460. tab tolerance, error reporting, and directory-exclusion logic.
  461. Fixes bug 29746; bugfix on 0.4.1.1-alpha.
  462. - When running check-best-practices, only consider files in the src
  463. subdirectory. Previously we had recursively considered all
  464. subdirectories, which made us get confused by the temporary
  465. directories made by "make distcheck". Fixes bug 31578; bugfix
  466. on 0.4.1.1-alpha.
  467. o Minor bugfixes (build system):
  468. - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
  469. systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
  470. o Minor bugfixes (chutney, makefiles, documentation):
  471. - "make test-network-all" now shows the warnings from each test-
  472. network.sh run on the console, so developers see new warnings
  473. early. We've also improved the documentation for this feature, and
  474. renamed a Makefile variable so the code is self-documenting. Fixes
  475. bug 30455; bugfix on 0.3.0.4-rc.
  476. o Minor bugfixes (compilation):
  477. - Add more stub functions to fix compilation on Android with link-
  478. time optimization when --disable-module-dirauth is used.
  479. Previously, these compilation settings would make the compiler
  480. look for functions that didn't exist. Fixes bug 31552; bugfix
  481. on 0.4.1.1-alpha.
  482. - Suppress spurious float-conversion warnings from GCC when calling
  483. floating-point classifier functions on FreeBSD. Fixes part of bug
  484. 31687; bugfix on 0.3.1.5-alpha.
  485. o Minor bugfixes (configuration):
  486. - Invalid floating-point values in the configuration file are now
  487. treated as errors in the configuration. Previously, they were
  488. ignored and treated as zero. Fixes bug 31475; bugfix on 0.0.1.
  489. o Minor bugfixes (coverity):
  490. - Add an assertion when parsing a BEGIN cell so that coverity can be
  491. sure that we are not about to dereference a NULL address. Fixes
  492. bug 31026; bugfix on 0.2.4.7-alpha. This is CID 1447296.
  493. - In our siphash implementation, when building for coverity, use
  494. memcpy in place of a switch statement, so that coverity can tell
  495. we are not accessing out-of-bounds memory. Fixes bug 31025; bugfix
  496. on 0.2.8.1-alpha. This is tracked as CID 1447293 and 1447295.
  497. - Fix several coverity warnings from our unit tests. Fixes bug
  498. 31030; bugfix on 0.2.4.1-alpha, 0.3.2.1-alpha, and 0.4.0.1-alpha.
  499. o Minor bugfixes (developer tooling):
  500. - Only log git script changes in the post-merge script when the
  501. merge was to the master branch. Fixes bug 31040; bugfix
  502. on 0.4.1.1-alpha.
  503. o Minor bugfixes (directory authorities):
  504. - Return a distinct status when formatting annotations fails. Fixes
  505. bug 30780; bugfix on 0.2.0.8-alpha.
  506. o Minor bugfixes (error handling):
  507. - On abort, try harder to flush the output buffers of log messages.
  508. On some platforms (macOS), log messages could be discarded when
  509. the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
  510. - Report the tor version whenever an assertion fails. Previously, we
  511. only reported the Tor version on some crashes, and some non-fatal
  512. assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
  513. - When tor aborts due to an error, close log file descriptors before
  514. aborting. Closing the logs makes some OSes flush log file buffers,
  515. rather than deleting buffered log lines. Fixes bug 31594; bugfix
  516. on 0.2.5.2-alpha.
  517. o Minor bugfixes (FreeBSD, PF-based proxy, IPv6):
  518. - When extracting an IPv6 address from a PF-based proxy, verify that
  519. we are actually configured to receive an IPv6 address, and log an
  520. internal error if not. Fixes part of bug 31687; bugfix
  521. on 0.2.3.4-alpha.
  522. o Minor bugfixes (git hooks):
  523. - Remove a duplicate call to practracker from the pre-push hook. The
  524. pre-push hook already calls the pre-commit hook, which calls
  525. practracker. Fixes bug 31462; bugfix on 0.4.1.1-alpha.
  526. o Minor bugfixes (git scripts):
  527. - Stop hard-coding the bash path in the git scripts. Some OSes don't
  528. have bash in /usr/bin, others have an ancient bash at this path.
  529. Fixes bug 30840; bugfix on 0.4.0.1-alpha.
  530. - Stop hard-coding the tor master branch name and worktree path in
  531. the git scripts. Fixes bug 30841; bugfix on 0.4.0.1-alpha.
  532. - Allow git-push-all.sh to be run from any directory. Previously,
  533. the script only worked if run from an upstream worktree directory.
  534. Closes ticket 31678.
  535. o Minor bugfixes (guards):
  536. - When tor is missing descriptors for some primary entry guards,
  537. make the log message less alarming. It's normal for descriptors to
  538. expire, as long as tor fetches new ones soon after. Fixes bug
  539. 31657; bugfix on 0.3.3.1-alpha.
  540. o Minor bugfixes (ipv6):
  541. - Check for private IPv6 addresses alongside their IPv4 equivalents
  542. when authorities check descriptors. Previously, we only checked
  543. for private IPv4 addresses. Fixes bug 31088; bugfix on
  544. 0.2.3.21-rc. Patch by Neel Chauhan.
  545. - When parsing microdescriptors, we should check the IPv6 exit
  546. policy alongside IPv4. Previously, we checked both exit policies
  547. for only router info structures, while microdescriptors were
  548. IPv4-only. Fixes bug 27284; bugfix on 0.2.3.1-alpha. Patch by
  549. Neel Chauhan.
  550. o Minor bugfixes (logging):
  551. - Change log level of message "Hash of session info was not as
  552. expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
  553. on 0.1.1.10-alpha.
  554. - Fix a code issue that would have broken our parsing of log domains
  555. as soon as we had 33 of them. Fortunately, we still only have 29.
  556. Fixes bug 31451; bugfix on 0.4.1.4-rc.
  557. o Minor bugfixes (memory management):
  558. - Stop leaking a small amount of memory in nt_service_install(), in
  559. unreachable code. Fixes bug 30799; bugfix on 0.2.0.7-alpha. Patch
  560. by Xiaoyin Liu.
  561. o Minor bugfixes (networking, IP addresses):
  562. - When parsing addresses via Tor's internal DNS lookup API, reject
  563. IPv4 addresses in square brackets, and accept IPv6 addresses in
  564. square brackets. This change completes the work started in 23082,
  565. making address parsing consistent between tor's internal DNS
  566. lookup and address parsing APIs. Fixes bug 30721; bugfix
  567. on 0.2.1.5-alpha.
  568. - When parsing addresses via Tor's internal address:port parsing and
  569. DNS lookup APIs, require IPv6 addresses with ports to have square
  570. brackets. But allow IPv6 addresses without ports, whether or not
  571. they have square brackets. Fixes bug 30721; bugfix
  572. on 0.2.1.5-alpha.
  573. o Minor bugfixes (onion service v3):
  574. - When purging the client descriptor cache, close any introduction
  575. point circuits associated with purged cache entries. This avoids
  576. picking those circuits later when connecting to the same
  577. introduction points. Fixes bug 30921; bugfix on 0.3.2.1-alpha.
  578. o Minor bugfixes (onion services):
  579. - In the hs_ident_circuit_t data structure, remove the unused field
  580. circuit_type and the respective argument in hs_ident_circuit_new().
  581. This field was set by clients (for introduction) and services (for
  582. introduction and rendezvous) but was never used afterwards. Fixes
  583. bug 31490; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan.
  584. o Minor bugfixes (operator tools):
  585. - Make tor-print-ed-signing-cert(1) print certificate expiration
  586. date in RFC 1123 and UNIX timestamp formats, to make output
  587. machine readable. Fixes bug 31012; bugfix on 0.3.5.1-alpha.
  588. o Minor bugfixes (rust):
  589. - Correctly exclude a redundant rust build job in Travis. Fixes bug
  590. 31463; bugfix on 0.3.5.4-alpha.
  591. - Raise the minimum rustc version to 1.31.0, as checked by configure
  592. and CI. Fixes bug 31442; bugfix on 0.3.5.4-alpha.
  593. o Minor bugfixes (sendme, code structure):
  594. - Rename the trunnel SENDME file definition from sendme.trunnel to
  595. sendme_cell.trunnel to avoid having twice sendme.{c|h} in the
  596. repository. Fixes bug 30769; bugfix on 0.4.1.1-alpha.
  597. o Minor bugfixes (statistics):
  598. - Stop removing the ed25519 signature if the extra info file is too
  599. big. If the signature data was removed, but the keyword was kept,
  600. this could result in an unparseable extra info file. Fixes bug
  601. 30958; bugfix on 0.2.7.2-alpha.
  602. o Minor bugfixes (subsystems):
  603. - Make the subsystem init order match the subsystem module
  604. dependencies. Call windows process security APIs as early as
  605. possible. Initialize logging before network and time, so that
  606. network and time can use logging. Fixes bug 31615; bugfix
  607. on 0.4.0.1-alpha.
  608. o Minor bugfixes (testing):
  609. - Teach the util/socketpair_ersatz test to work correctly when we
  610. have no network stack configured. Fixes bug 30804; bugfix
  611. on 0.2.5.1-alpha.
  612. o Minor bugfixes (v2 single onion services):
  613. - Always retry v2 single onion service intro and rend circuits with
  614. a 3-hop path. Previously, v2 single onion services used a 3-hop
  615. path when rendezvous circuits were retried after a remote or
  616. delayed failure, but a 1-hop path for immediate retries. Fixes bug
  617. 23818; bugfix on 0.2.9.3-alpha.
  618. o Minor bugfixes (v3 single onion services):
  619. - Always retry v3 single onion service intro and rend circuits with
  620. a 3-hop path. Previously, v3 single onion services used a 3-hop
  621. path when rend circuits were retried after a remote or delayed
  622. failure, but a 1-hop path for immediate retries. Fixes bug 23818;
  623. bugfix on 0.3.2.1-alpha.
  624. - Make v3 single onion services fall back to a 3-hop intro, when all
  625. intro points are unreachable via a 1-hop path. Previously, v3
  626. single onion services failed when all intro nodes were unreachable
  627. via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
  628. o Documentation:
  629. - Improve documentation in circuit padding subsystem. Patch by
  630. Tobias Pulls. Closes ticket 31113.
  631. - Include an example usage for IPv6 ORPort in our sample torrc.
  632. Closes ticket 31320; patch from Ali Raheem.
  633. - Use RFC 2397 data URL scheme to embed an image into tor-exit-
  634. notice.html so that operators no longer have to host it
  635. themselves. Closes ticket 31089.
  636. o Removed features:
  637. - No longer include recommended package digests in votes as detailed
  638. in proposal 301. The RecommendedPackages torrc option is
  639. deprecated and will no longer have any effect. "package" lines
  640. will still be considered when computing consensuses for consensus
  641. methods that include them. (This change has no effect on the list
  642. of recommended Tor versions, which is still in use.) Closes
  643. ticket 29738.
  644. - Remove torctl.in from contrib/dist directory. Resolves
  645. ticket 30550.
  646. o Testing:
  647. - Run shellcheck for all non-third-party shell scripts that are
  648. shipped with Tor. Closes ticket 29533.
  649. - When checking shell scripts, ignore any user-created directories.
  650. Closes ticket 30967.
  651. o Code simplification and refactoring (config handling):
  652. - Extract our variable manipulation code from confparse.c to a new
  653. lower-level typedvar.h module. Closes ticket 30864.
  654. - Lower another layer of object management from confparse.c to a
  655. more general tool. Now typed structure members are accessible via
  656. an abstract type. Implements ticket 30914.
  657. - Move our backend logic for working with configuration and state
  658. files into a lower-level library, since it no longer depends on
  659. any tor-specific functionality. Closes ticket 31626.
  660. - Numerous simplifications in configuration-handling logic: remove
  661. duplicated macro definitions, replace magical names with flags,
  662. and refactor "TestingTorNetwork" to use the same default-option
  663. logic as the rest of Tor. Closes ticket 30935.
  664. - Replace our ad-hoc set of flags for configuration variables and
  665. configuration variable types with fine-grained orthogonal flags
  666. corresponding to the actual behavior we want. Closes ticket 31625.
  667. o Code simplification and refactoring (misc):
  668. - Eliminate some uses of lower-level control reply abstractions,
  669. primarily in the onion_helper functions. Closes ticket 30889.
  670. - Rework bootstrap tracking to use the new publish-subscribe
  671. subsystem. Closes ticket 29976.
  672. - Rewrite format_node_description() and router_get_verbose_nickname()
  673. to use strlcpy() and strlcat(). The previous implementation used
  674. memcpy() and pointer arithmetic, which was error-prone. Closes
  675. ticket 31545. This is CID 1452819.
  676. - Split extrainfo_dump_to_string() into smaller functions. Closes
  677. ticket 30956.
  678. - Use the ptrdiff_t type consistently for expressing variable
  679. offsets and pointer differences. Previously we incorrectly (but
  680. harmlessly) used int and sometimes off_t for these cases. Closes
  681. ticket 31532.
  682. - Use the subsystems mechanism to manage the main event loop code.
  683. Closes ticket 30806.
  684. - Various simplifications and minor improvements to the circuit
  685. padding machines. Patch by Tobias Pulls. Closes tickets 31112
  686. and 31098.
  687. o Documentation (hard-coded directories):
  688. - Improve the documentation for the DirAuthority and FallbackDir
  689. torrc options. Closes ticket 30955.
  690. o Documentation (tor.1 man page):
  691. - Fix typo in tor.1 man page: the option is "--help", not "-help".
  692. Fixes bug 31008; bugfix on 0.2.2.9-alpha.
  693. Changes in version 0.4.1.5 - 2019-08-20
  694. This is the first stable release in the 0.4.1.x series. This series
  695. adds experimental circuit-level padding, authenticated SENDME cells to
  696. defend against certain attacks, and several performance improvements
  697. to save on CPU consumption. It fixes bugs in bootstrapping and v3
  698. onion services. It also includes numerous smaller features and
  699. bugfixes on earlier versions.
  700. Per our support policy, we will support the 0.4.1.x series for nine
  701. months, or until three months after the release of a stable 0.4.2.x:
  702. whichever is longer. If you need longer-term support, please stick
  703. with 0.3.5.x, which will we plan to support until Feb 2022.
  704. Below are the changes since 0.4.1.4-rc. For a complete list of changes
  705. since 0.4.0.5, see the ReleaseNotes file.
  706. o Directory authority changes:
  707. - The directory authority "dizum" has a new IP address. Closes
  708. ticket 31406.
  709. o Minor features (circuit padding logging):
  710. - Demote noisy client-side warn logs about circuit padding to
  711. protocol warnings. Add additional log messages and circuit ID
  712. fields to help with bug 30992 and any other future issues.
  713. o Minor bugfixes (circuit padding negotiation):
  714. - Bump the circuit padding protocol version to explicitly signify
  715. that the HS setup machine support is finalized in 0.4.1.x-stable.
  716. This also means that 0.4.1.x-alpha clients will not negotiate
  717. padding with 0.4.1.x-stable relays, and 0.4.1.x-stable clients
  718. will not negotiate padding with 0.4.1.x-alpha relays (or 0.4.0.x
  719. relays). Fixes bug 31356; bugfix on 0.4.1.1-alpha.
  720. o Minor bugfixes (circuit padding):
  721. - Ignore non-padding cells on padding circuits. This addresses
  722. various warning messages from subsystems that were not expecting
  723. padding circuits. Fixes bug 30942; bugfix on 0.4.1.1-alpha.
  724. o Minor bugfixes (clock skew detection):
  725. - Don't believe clock skew results from NETINFO cells that appear to
  726. arrive before we sent the VERSIONS cells they are responding to.
  727. Previously, we would accept them up to 3 minutes "in the past".
  728. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
  729. o Minor bugfixes (compatibility, standards compliance):
  730. - Fix a bug that would invoke undefined behavior on certain
  731. operating systems when trying to asprintf() a string exactly
  732. INT_MAX bytes long. We don't believe this is exploitable, but it's
  733. better to fix it anyway. Fixes bug 31001; bugfix on 0.2.2.11-alpha.
  734. Found and fixed by Tobias Stoeckmann.
  735. o Minor bugfixes (compilation warning):
  736. - Fix a compilation warning on Windows about casting a function
  737. pointer for GetTickCount64(). Fixes bug 31374; bugfix
  738. on 0.2.9.1-alpha.
  739. o Minor bugfixes (compilation):
  740. - Avoid using labs() on time_t, which can cause compilation warnings
  741. on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
  742. o Minor bugfixes (distribution):
  743. - Do not ship any temporary files found in the
  744. scripts/maint/practracker directory. Fixes bug 31311; bugfix
  745. on 0.4.1.1-alpha.
  746. o Testing (continuous integration):
  747. - In Travis, make stem log a controller trace to the console, and
  748. tail stem's tor log after failure. Closes ticket 30591.
  749. - In Travis, only run the stem tests that use a tor binary. Closes
  750. ticket 30694.
  751. Changes in version 0.4.1.4-rc - 2019-07-25
  752. Tor 0.4.1.4-rc fixes a few bugs from previous versions of Tor, and
  753. updates to a new list of fallback directories. If no new bugs are
  754. found, the next release in the 0.4.1.x serious should be stable.
  755. o Major bugfixes (circuit build, guard):
  756. - When considering upgrading circuits from "waiting for guard" to
  757. "open", always ignore circuits that are marked for close. Otherwise,
  758. we can end up in the situation where a subsystem is notified that
  759. a closing circuit has just opened, leading to undesirable
  760. behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
  761. o Minor features (continuous integration):
  762. - Our Travis configuration now uses Chutney to run some network
  763. integration tests automatically. Closes ticket 29280.
  764. o Minor features (fallback directory list):
  765. - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
  766. in December 2018 (of which ~122 were still functional), with a
  767. list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
  768. in June 2019. Closes ticket 28795.
  769. o Minor bugfixes (circuit padding):
  770. - On relays, properly check that a padding machine is absent before
  771. logging a warning about it being absent. Fixes bug 30649; bugfix
  772. on 0.4.0.1-alpha.
  773. - Add two NULL checks in unreachable places to silence Coverity (CID
  774. 144729 and 1447291) and better future-proof ourselves. Fixes bug
  775. 31024; bugfix on 0.4.1.1-alpha.
  776. o Minor bugfixes (crash on exit):
  777. - Avoid a set of possible code paths that could try to use freed
  778. memory in routerlist_free() while Tor was exiting. Fixes bug
  779. 31003; bugfix on 0.1.2.2-alpha.
  780. o Minor bugfixes (logging):
  781. - Fix a conflict between the flag used for messaging-domain log
  782. messages, and the LD_NO_MOCK testing flag. Fixes bug 31080; bugfix
  783. on 0.4.1.1-alpha.
  784. o Minor bugfixes (memory leaks):
  785. - Fix a trivial memory leak when parsing an invalid value from a
  786. download schedule in the configuration. Fixes bug 30894; bugfix
  787. on 0.3.4.1-alpha.
  788. o Code simplification and refactoring:
  789. - Remove some dead code from circpad_machine_remove_token() to fix
  790. some Coverity warnings (CID 1447298). Fixes bug 31027; bugfix
  791. on 0.4.1.1-alpha.
  792. Changes in version 0.4.1.3-alpha - 2019-06-25
  793. Tor 0.4.1.3-alpha resolves numerous bugs left over from the previous
  794. alpha, most of them from earlier release series.
  795. o Major bugfixes (Onion service reachability):
  796. - Properly clean up the introduction point map when circuits change
  797. purpose from onion service circuits to pathbias, measurement, or
  798. other circuit types. This should fix some service-side instances
  799. of introduction point failure. Fixes bug 29034; bugfix
  800. on 0.3.2.1-alpha.
  801. o Minor features (geoip):
  802. - Update geoip and geoip6 to the June 10 2019 Maxmind GeoLite2
  803. Country database. Closes ticket 30852.
  804. o Minor features (logging):
  805. - Give a more useful assertion failure message if we think we have
  806. minherit() but we fail to make a region non-inheritable. Give a
  807. compile-time warning if our support for minherit() is incomplete.
  808. Closes ticket 30686.
  809. o Minor bugfixes (circuit isolation):
  810. - Fix a logic error that prevented the SessionGroup sub-option from
  811. being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
  812. o Minor bugfixes (continuous integration):
  813. - Allow the test-stem job to fail in Travis, because it sometimes
  814. hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
  815. - Skip test_rebind on macOS in Travis, because it is unreliable on
  816. macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
  817. - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
  818. variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
  819. o Minor bugfixes (directory authorities):
  820. - Stop crashing after parsing an unknown descriptor purpose
  821. annotation. We think this bug can only be triggered by modifying a
  822. local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
  823. o Minor bugfixes (pluggable transports):
  824. - When running as a bridge with pluggable transports, always publish
  825. pluggable transport information in our extrainfo descriptor, even
  826. if ExtraInfoStatistics is 0. This information is needed by
  827. BridgeDB. Fixes bug 30956; bugfix on 0.4.1.1-alpha.
  828. o Documentation:
  829. - Mention URLs for Travis/Appveyor/Jenkins in ReleasingTor.md.
  830. Closes ticket 30630.
  831. Changes in version 0.4.1.2-alpha - 2019-06-06
  832. Tor 0.4.1.2-alpha resolves numerous bugs--some of them from the
  833. previous alpha, and some much older. It also contains minor testing
  834. improvements, and an improvement to the security of our authenticated
  835. SENDME implementation.
  836. o Major bugfixes (bridges):
  837. - Consider our directory information to have changed when our list
  838. of bridges changes. Previously, Tor would not re-compute the
  839. status of its directory information when bridges changed, and
  840. therefore would not realize that it was no longer able to build
  841. circuits. Fixes part of bug 29875.
  842. - Do not count previously configured working bridges towards our
  843. total of working bridges. Previously, when Tor's list of bridges
  844. changed, it would think that the old bridges were still usable,
  845. and delay fetching router descriptors for the new ones. Fixes part
  846. of bug 29875; bugfix on 0.3.0.1-alpha.
  847. o Major bugfixes (flow control, SENDME):
  848. - Decrement the stream-level package window after packaging a cell.
  849. Previously, it was done inside a log_debug() call, meaning that if
  850. debug logs were not enabled, the decrement would never happen, and
  851. thus the window would be out of sync with the other end point.
  852. Fixes bug 30628; bugfix on 0.4.1.1-alpha.
  853. o Major bugfixes (onion service reachability):
  854. - Properly clean up the introduction point map and associated state
  855. when circuits change purpose from onion service circuits to
  856. pathbias, measurement, or other circuit types. This may fix some
  857. instances of introduction point failure. Fixes bug 29034; bugfix
  858. on 0.3.2.1-alpha.
  859. o Minor features (authenticated SENDME):
  860. - Ensure that there is enough randomness on every circuit to prevent
  861. an attacker from successfully predicting the hashes they will need
  862. to include in authenticated SENDME cells. At a random interval, if
  863. we have not sent randomness already, we now leave some extra space
  864. at the end of a cell that we can fill with random bytes. Closes
  865. ticket 26846.
  866. o Minor features (continuous integration):
  867. - When running coverage builds on Travis, we now set
  868. TOR_TEST_RNG_SEED, to avoid RNG-based coverage differences. Part
  869. of ticket 28878.
  870. o Minor features (maintenance):
  871. - Add a new "make autostyle" target that developers can use to apply
  872. all automatic Tor style and consistency conversions to the
  873. codebase. Closes ticket 30539.
  874. o Minor features (testing):
  875. - The circuitpadding tests now use a reproducible RNG implementation,
  876. so that if a test fails, we can learn why. Part of ticket 28878.
  877. - Tor's tests now support an environment variable, TOR_TEST_RNG_SEED,
  878. to set the RNG seed for tests that use a reproducible RNG. Part of
  879. ticket 28878.
  880. - When running tests in coverage mode, take additional care to make
  881. our coverage deterministic, so that we can accurately track
  882. changes in code coverage. Closes ticket 30519.
  883. o Minor bugfixes (configuration, proxies):
  884. - Fix a bug that prevented us from supporting SOCKS5 proxies that
  885. want authentication along with configured (but unused!)
  886. ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
  887. o Minor bugfixes (controller):
  888. - POSTDESCRIPTOR requests should work again. Previously, they were
  889. broken if a "purpose=" flag was specified. Fixes bug 30580; bugfix
  890. on 0.4.1.1-alpha.
  891. - Repair the HSFETCH command so that it works again. Previously, it
  892. expected a body when it shouldn't have. Fixes bug 30646; bugfix
  893. on 0.4.1.1-alpha.
  894. o Minor bugfixes (developer tooling):
  895. - Fix pre-push hook to allow fixup and squash commits when pushing
  896. to non-upstream git remote. Fixes bug 30286; bugfix
  897. on 0.4.0.1-alpha.
  898. o Minor bugfixes (directory authority):
  899. - Move the "bandwidth-file-headers" line in directory authority
  900. votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
  901. on 0.3.5.1-alpha.
  902. o Minor bugfixes (NetBSD):
  903. - Fix usage of minherit() on NetBSD and other platforms that define
  904. MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug
  905. 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell.
  906. o Minor bugfixes (out-of-memory handler):
  907. - When purging the DNS cache because of an out-of-memory condition,
  908. try purging just the older entries at first. Previously, we would
  909. always purge the whole thing. Fixes bug 29617; bugfix
  910. on 0.3.5.1-alpha.
  911. o Minor bugfixes (portability):
  912. - Avoid crashing in our tor_vasprintf() implementation on systems
  913. that define neither vasprintf() nor _vscprintf(). (This bug has
  914. been here long enough that we question whether people are running
  915. Tor on such systems, but we're applying the fix out of caution.)
  916. Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
  917. Tobias Stoeckmann.
  918. o Minor bugfixes (shutdown, libevent, memory safety):
  919. - Avoid use-after-free bugs when shutting down, by making sure that
  920. we shut down libevent only after shutting down all of its users.
  921. We believe these are harmless in practice, since they only occur
  922. on the shutdown path, and do not involve any attacker-controlled
  923. data. Fixes bug 30629; bugfix on 0.4.1.1-alpha.
  924. o Minor bugfixes (static analysis):
  925. - Fix several spurious Coverity warnings about the unit tests, to
  926. lower our chances of missing real warnings in the future. Fixes
  927. bug 30150; bugfix on 0.3.5.1-alpha and various other Tor versions.
  928. o Testing:
  929. - Specify torrc paths (with empty files) when launching tor in
  930. integration tests; refrain from reading user and system torrcs.
  931. Resolves issue 29702.
  932. Changes in version 0.4.1.1-alpha - 2019-05-22
  933. This is the first alpha in the 0.4.1.x series. It introduces
  934. lightweight circuit padding to make some onion-service circuits harder
  935. to distinguish, includes a new "authenticated SENDME" feature to make
  936. certain denial-of-service attacks more difficult, and improves
  937. performance in several areas.
  938. o Major features (circuit padding):
  939. - Onion service clients now add padding cells at the start of their
  940. INTRODUCE and RENDEZVOUS circuits, to make those circuits' traffic
  941. look more like general purpose Exit traffic. The overhead for this
  942. is 2 extra cells in each direction for RENDEZVOUS circuits, and 1
  943. extra upstream cell and 10 downstream cells for INTRODUCE
  944. circuits. This feature is only enabled when also supported by the
  945. circuit's middle node. (Clients may specify fixed middle nodes
  946. with the MiddleNodes option, and may force-disable this feature
  947. with the CircuitPadding option.) Closes ticket 28634.
  948. o Major features (code organization):
  949. - Tor now includes a generic publish-subscribe message-passing
  950. subsystem that we can use to organize intermodule dependencies. We
  951. hope to use this to reduce dependencies between modules that don't
  952. need to be related, and to generally simplify our codebase. Closes
  953. ticket 28226.
  954. o Major features (controller protocol):
  955. - Controller commands are now parsed using a generalized parsing
  956. subsystem. Previously, each controller command was responsible for
  957. parsing its own input, which led to strange inconsistencies.
  958. Closes ticket 30091.
  959. o Major features (flow control):
  960. - Implement authenticated SENDMEs as detailed in proposal 289. A
  961. SENDME cell now includes the digest of the traffic that it
  962. acknowledges, so that once an end point receives the SENDME, it
  963. can confirm the other side's knowledge of the previous cells that
  964. were sent, and prevent certain types of denial-of-service attacks.
  965. This behavior is controlled by two new consensus parameters: see
  966. the proposal for more details. Fixes ticket 26288.
  967. o Major features (performance):
  968. - Our node selection algorithm now excludes nodes in linear time.
  969. Previously, the algorithm was quadratic, which could slow down
  970. heavily used onion services. Closes ticket 30307.
  971. o Major features (performance, RNG):
  972. - Tor now constructs a fast secure pseudorandom number generator for
  973. each thread, to use when performance is critical. This PRNG is
  974. based on AES-CTR, using a buffering construction similar to
  975. libottery and the (newer) OpenBSD arc4random() code. It
  976. outperforms OpenSSL 1.1.1a's CSPRNG by roughly a factor of 100 for
  977. small outputs. Although we believe it to be cryptographically
  978. strong, we are only using it when necessary for performance.
  979. Implements tickets 29023 and 29536.
  980. o Major bugfixes (onion service v3):
  981. - Fix an unreachable bug in which an introduction point could try to
  982. send an INTRODUCE_ACK with a status code that Trunnel would refuse
  983. to encode, leading the relay to assert(). We've consolidated the
  984. ABI values into Trunnel now. Fixes bug 30454; bugfix
  985. on 0.3.0.1-alpha.
  986. - Clients can now handle unknown status codes from INTRODUCE_ACK
  987. cells. (The NACK behavior will stay the same.) This will allow us
  988. to extend status codes in the future without breaking the normal
  989. client behavior. Fixes another part of bug 30454; bugfix
  990. on 0.3.0.1-alpha.
  991. o Minor features (circuit padding):
  992. - We now use a fast PRNG when scheduling circuit padding. Part of
  993. ticket 28636.
  994. - Allow the padding machine designer to pick the edges of their
  995. histogram instead of trying to compute them automatically using an
  996. exponential formula. Resolves some undefined behavior in the case
  997. of small histograms and allows greater flexibility on machine
  998. design. Closes ticket 29298; bugfix on 0.4.0.1-alpha.
  999. - Allow circuit padding machines to hold a circuit open until they
  1000. are done padding it. Closes ticket 28780.
  1001. o Minor features (compile-time modules):
  1002. - Add a "--list-modules" command to print a list of which compile-
  1003. time modules are enabled. Closes ticket 30452.
  1004. o Minor features (continuous integration):
  1005. - Remove sudo configuration lines from .travis.yml as they are no
  1006. longer needed with current Travis build environment. Resolves
  1007. issue 30213.
  1008. - In Travis, show stem's tor log after failure. Closes ticket 30234.
  1009. o Minor features (controller):
  1010. - Add onion service version 3 support to the HSFETCH command.
  1011. Previously, only version 2 onion services were supported. Closes
  1012. ticket 25417. Patch by Neel Chauhan.
  1013. o Minor features (debugging):
  1014. - Introduce tor_assertf() and tor_assertf_nonfatal() to enable
  1015. logging of additional information during assert failure. Now we
  1016. can use format strings to include information for trouble
  1017. shooting. Resolves ticket 29662.
  1018. o Minor features (defense in depth):
  1019. - In smartlist_remove_keeporder(), set unused pointers to NULL, in
  1020. case a bug causes them to be used later. Closes ticket 30176.
  1021. Patch from Tobias Stoeckmann.
  1022. - Tor now uses a cryptographically strong PRNG even for decisions
  1023. that we do not believe are security-sensitive. Previously, for
  1024. performance reasons, we had used a trivially predictable linear
  1025. congruential generator algorithm for certain load-balancing and
  1026. statistical sampling decisions. Now we use our fast RNG in those
  1027. cases. Closes ticket 29542.
  1028. o Minor features (developer tools):
  1029. - Tor's "practracker" test script now checks for files and functions
  1030. that seem too long and complicated. Existing overlong functions
  1031. and files are accepted for now, but should eventually be
  1032. refactored. Closes ticket 29221.
  1033. - Add some scripts used for git maintenance to scripts/git. Closes
  1034. ticket 29391.
  1035. - Call practracker from pre-push and pre-commit git hooks to let
  1036. developers know if they made any code style violations. Closes
  1037. ticket 30051.
  1038. - Add a script to check that each header has a well-formed and
  1039. unique guard macro. Closes ticket 29756.
  1040. o Minor features (geoip):
  1041. - Update geoip and geoip6 to the May 13 2019 Maxmind GeoLite2
  1042. Country database. Closes ticket 30522.
  1043. o Minor features (HTTP tunnel):
  1044. - Return an informative web page when the HTTPTunnelPort is used as
  1045. an HTTP proxy. Closes ticket 27821, patch by "eighthave".
  1046. o Minor features (IPv6, v3 onion services):
  1047. - Make v3 onion services put IPv6 addresses in service descriptors.
  1048. Before this change, service descriptors only contained IPv4
  1049. addresses. Implements 26992.
  1050. o Minor features (modularity):
  1051. - The "--disable-module-dirauth" compile-time option now disables
  1052. even more dirauth-only code. Closes ticket 30345.
  1053. o Minor features (performance):
  1054. - Use OpenSSL's implementations of SHA3 when available (in OpenSSL
  1055. 1.1.1 and later), since they tend to be faster than tiny-keccak.
  1056. Closes ticket 28837.
  1057. o Minor features (testing):
  1058. - Tor's unit test code now contains helper functions to replace the
  1059. PRNG with a deterministic or reproducible version for testing.
  1060. Previously, various tests implemented this in various ways.
  1061. Implements ticket 29732.
  1062. - We now have a script, cov-test-determinism.sh, to identify places
  1063. where our unit test coverage has become nondeterministic. Closes
  1064. ticket 29436.
  1065. - Check that representative subsets of values of `int` and `unsigned
  1066. int` can be represented by `void *`. Resolves issue 29537.
  1067. o Minor bugfixes (bridge authority):
  1068. - Bridge authorities now set bridges as running or non-running when
  1069. about to dump their status to a file. Previously, they set bridges
  1070. as running in response to a GETINFO command, but those shouldn't
  1071. modify data structures. Fixes bug 24490; bugfix on 0.2.0.13-alpha.
  1072. Patch by Neel Chauhan.
  1073. o Minor bugfixes (channel padding statistics):
  1074. - Channel padding write totals and padding-enabled totals are now
  1075. counted properly in relay extrainfo descriptors. Fixes bug 29231;
  1076. bugfix on 0.3.1.1-alpha.
  1077. o Minor bugfixes (circuit padding):
  1078. - Add a "CircuitPadding" torrc option to disable circuit padding.
  1079. Fixes bug 28693; bugfix on 0.4.0.1-alpha.
  1080. - Allow circuit padding machines to specify that they do not
  1081. contribute much overhead, and provide consensus flags and torrc
  1082. options to force clients to only use these low overhead machines.
  1083. Fixes bug 29203; bugfix on 0.4.0.1-alpha.
  1084. - Provide a consensus parameter to fully disable circuit padding, to
  1085. be used in emergency network overload situations. Fixes bug 30173;
  1086. bugfix on 0.4.0.1-alpha.
  1087. - The circuit padding subsystem will no longer schedule padding if
  1088. dormant mode is enabled. Fixes bug 28636; bugfix on 0.4.0.1-alpha.
  1089. - Inspect a circuit-level cell queue before sending padding, to
  1090. avoid sending padding while too much data is already queued. Fixes
  1091. bug 29204; bugfix on 0.4.0.1-alpha.
  1092. - Avoid calling monotime_absolute_usec() in circuit padding machines
  1093. that do not use token removal or circuit RTT estimation. Fixes bug
  1094. 29085; bugfix on 0.4.0.1-alpha.
  1095. o Minor bugfixes (compilation, unusual configurations):
  1096. - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
  1097. due to missing declarations of abort(), and prevent other such
  1098. failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
  1099. o Minor bugfixes (controller protocol):
  1100. - Teach the controller parser to distinguish an object preceded by
  1101. an argument list from one without. Previously, it couldn't
  1102. distinguish an argument list from the first line of a multiline
  1103. object. Fixes bug 29984; bugfix on 0.2.3.8-alpha.
  1104. o Minor bugfixes (directory authority, ipv6):
  1105. - Directory authorities with IPv6 support now always mark themselves
  1106. as reachable via IPv6. Fixes bug 24338; bugfix on 0.2.4.1-alpha.
  1107. Patch by Neel Chauhan.
  1108. o Minor bugfixes (documentation):
  1109. - Improve the documentation for using MapAddress with ".exit". Fixes
  1110. bug 30109; bugfix on 0.1.0.1-rc.
  1111. - Improve the monotonic time module and function documentation to
  1112. explain what "monotonic" actually means, and document some results
  1113. that have surprised people. Fixes bug 29640; bugfix
  1114. on 0.2.9.1-alpha.
  1115. - Use proper formatting when providing an example on quoting options
  1116. that contain whitespace. Fixes bug 29635; bugfix on 0.2.3.18-rc.
  1117. o Minor bugfixes (logging):
  1118. - Do not log a warning when running with an OpenSSL version other
  1119. than the one Tor was compiled with, if the two versions should be
  1120. compatible. Previously, we would warn whenever the version was
  1121. different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
  1122. - Warn operators when the MyFamily option is set but ContactInfo is
  1123. missing, as the latter should be set too. Fixes bug 25110; bugfix
  1124. on 0.3.3.1-alpha.
  1125. o Minor bugfixes (memory leak):
  1126. - Avoid a minor memory leak that could occur on relays when failing
  1127. to create a "keys" directory. Fixes bug 30148; bugfix
  1128. on 0.3.3.1-alpha.
  1129. o Minor bugfixes (onion services):
  1130. - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
  1131. implemenation) when failing to load an onion service client
  1132. authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
  1133. - When refusing to launch a controller's HSFETCH request because of
  1134. rate-limiting, respond to the controller with a new response,
  1135. "QUERY_RATE_LIMITED". Previously, we would log QUERY_NO_HSDIR for
  1136. this case. Fixes bug 28269; bugfix on 0.3.1.1-alpha. Patch by
  1137. Neel Chauhan.
  1138. - When relaunching a circuit to a rendezvous service, mark the
  1139. circuit as needing high-uptime routers as appropriate. Fixes bug
  1140. 17357; bugfix on 0.1.0.1-rc. Patch by Neel Chauhan.
  1141. - Stop ignoring IPv6 link specifiers sent to v3 onion services.
  1142. (IPv6 support for v3 onion services is still incomplete: see
  1143. ticket 23493 for details.) Fixes bug 23588; bugfix on
  1144. 0.3.2.1-alpha. Patch by Neel Chauhan.
  1145. o Minor bugfixes (onion services, performance):
  1146. - When building circuits to onion services, call tor_addr_parse()
  1147. less often. Previously, we called tor_addr_parse() in
  1148. circuit_is_acceptable() even if its output wasn't used. This
  1149. change should improve performance when building circuits. Fixes
  1150. bug 22210; bugfix on 0.2.8.12. Patch by Neel Chauhan.
  1151. o Minor bugfixes (performance):
  1152. - When checking whether a node is a bridge, use a fast check to make
  1153. sure that its identity is set. Previously, we used a constant-time
  1154. check, which is not necessary in this case. Fixes bug 30308;
  1155. bugfix on 0.3.5.1-alpha.
  1156. o Minor bugfixes (pluggable transports):
  1157. - Tor now sets TOR_PT_EXIT_ON_STDIN_CLOSE=1 for client transports as
  1158. well as servers. Fixes bug 25614; bugfix on 0.2.7.1-alpha.
  1159. o Minor bugfixes (probability distributions):
  1160. - Refactor and improve parts of the probability distribution code
  1161. that made Coverity complain. Fixes bug 29805; bugfix
  1162. on 0.4.0.1-alpha.
  1163. o Minor bugfixes (python):
  1164. - Stop assuming that /usr/bin/python3 exists. For scripts that work
  1165. with python2, use /usr/bin/python. Otherwise, use /usr/bin/env
  1166. python3. Fixes bug 29913; bugfix on 0.2.5.3-alpha.
  1167. o Minor bugfixes (relay):
  1168. - When running as a relay, if IPv6Exit is set to 1 while ExitRelay
  1169. is auto, act as if ExitRelay is 1. Previously, we would ignore
  1170. IPv6Exit if ExitRelay was 0 or auto. Fixes bug 29613; bugfix on
  1171. 0.3.5.1-alpha. Patch by Neel Chauhan.
  1172. o Minor bugfixes (stats):
  1173. - When ExtraInfoStatistics is 0, stop including bandwidth usage
  1174. statistics, GeoIPFile hashes, ServerTransportPlugin lines, and
  1175. bridge statistics by country in extra-info documents. Fixes bug
  1176. 29018; bugfix on 0.2.4.1-alpha.
  1177. o Minor bugfixes (testing):
  1178. - Call setrlimit() to disable core dumps in test_bt_cl.c. Previously
  1179. we used `ulimit -c` in test_bt.sh, which violates POSIX shell
  1180. compatibility. Fixes bug 29061; bugfix on 0.3.5.1-alpha.
  1181. - Fix some incorrect code in the v3 onion service unit tests. Fixes
  1182. bug 29243; bugfix on 0.3.2.1-alpha.
  1183. - In the "routerkeys/*" tests, check the return values of mkdir()
  1184. for possible failures. Fixes bug 29939; bugfix on 0.2.7.2-alpha.
  1185. Found by Coverity as CID 1444254.
  1186. - Split test_utils_general() into several smaller test functions.
  1187. This makes it easier to perform resource deallocation on assert
  1188. failure, and fixes Coverity warnings CID 1444117 and CID 1444118.
  1189. Fixes bug 29823; bugfix on 0.2.9.1-alpha.
  1190. o Minor bugfixes (tor-resolve):
  1191. - Fix a memory leak in tor-resolve that could happen if Tor gave it
  1192. a malformed SOCKS response. (Memory leaks in tor-resolve don't
  1193. actually matter, but it's good to fix them anyway.) Fixes bug
  1194. 30151; bugfix on 0.4.0.1-alpha.
  1195. o Code simplification and refactoring:
  1196. - Abstract out the low-level formatting of replies on the control
  1197. port. Implements ticket 30007.
  1198. - Add several assertions in an attempt to fix some Coverity
  1199. warnings. Closes ticket 30149.
  1200. - Introduce a connection_dir_buf_add() helper function that checks
  1201. for compress_state of dir_connection_t and automatically writes a
  1202. string to directory connection with or without compression.
  1203. Resolves issue 28816.
  1204. - Make the base32_decode() API return the number of bytes written,
  1205. for consistency with base64_decode(). Closes ticket 28913.
  1206. - Move most relay-only periodic events out of mainloop.c into the
  1207. relay subsystem. Closes ticket 30414.
  1208. - Refactor and encapsulate parts of the codebase that manipulate
  1209. crypt_path_t objects. Resolves issue 30236.
  1210. - Refactor several places in our code that Coverity incorrectly
  1211. believed might have memory leaks. Closes ticket 30147.
  1212. - Remove redundant return values in crypto_format, and the
  1213. associated return value checks elsewhere in the code. Make the
  1214. implementations in crypto_format consistent, and remove redundant
  1215. code. Resolves ticket 29660.
  1216. - Rename tor_mem_is_zero() to fast_mem_is_zero(), to emphasize that
  1217. it is not a constant-time function. Closes ticket 30309.
  1218. - Replace hs_desc_link_specifier_t with link_specifier_t, and remove
  1219. all hs_desc_link_specifier_t-specific code. Fixes bug 22781;
  1220. bugfix on 0.3.2.1-alpha.
  1221. - Simplify v3 onion service link specifier handling code. Fixes bug
  1222. 23576; bugfix on 0.3.2.1-alpha.
  1223. - Split crypto_digest.c into NSS code, OpenSSL code, and shared
  1224. code. Resolves ticket 29108.
  1225. - Split control.c into several submodules, in preparation for
  1226. distributing its current responsibilities throughout the codebase.
  1227. Closes ticket 29894.
  1228. - Start to move responsibility for knowing about periodic events to
  1229. the appropriate subsystems, so that the mainloop doesn't need to
  1230. know all the periodic events in the rest of the codebase.
  1231. Implements tickets 30293 and 30294.
  1232. o Documentation:
  1233. - Document how to find git commits and tags for bug fixes in
  1234. CodingStandards.md. Update some file documentation. Closes
  1235. ticket 30261.
  1236. o Removed features:
  1237. - Remove the linux-tor-prio.sh script from contrib/operator-tools
  1238. directory. Resolves issue 29434.
  1239. - Remove the obsolete OpenSUSE initscript. Resolves issue 30076.
  1240. - Remove the obsolete script at contrib/dist/tor.sh.in. Resolves
  1241. issue 30075.
  1242. o Code simplification and refactoring (shell scripts):
  1243. - Clean up many of our shell scripts to fix shellcheck warnings.
  1244. These include autogen.sh (ticket 26069), test_keygen.sh (ticket
  1245. 29062), test_switch_id.sh (ticket 29065), test_rebind.sh (ticket
  1246. 29063), src/test/fuzz/minimize.sh (ticket 30079), test_rust.sh
  1247. (ticket 29064), torify (ticket 29070), asciidoc-helper.sh (29926),
  1248. fuzz_multi.sh (30077), fuzz_static_testcases.sh (ticket 29059),
  1249. nagios-check-tor-authority-cert (ticket 29071),
  1250. src/test/fuzz/fixup_filenames.sh (ticket 30078), test-network.sh
  1251. (ticket 29060), test_key_expiration.sh (ticket 30002),
  1252. zero_length_keys.sh (ticket 29068), and test_workqueue_*.sh
  1253. (ticket 29067).
  1254. o Testing (chutney):
  1255. - In "make test-network-all", test IPv6-only v3 single onion
  1256. services, using the chutney network single-onion-v23-ipv6-md.
  1257. Closes ticket 27251.
  1258. Changes in version 0.4.0.5 - 2019-05-02
  1259. This is the first stable release in the 0.4.0.x series. It contains
  1260. improvements for power management and bootstrap reporting, as well as
  1261. preliminary backend support for circuit padding to prevent some kinds
  1262. of traffic analysis. It also continues our work in refactoring Tor for
  1263. long-term maintainability.
  1264. Per our support policy, we will support the 0.4.0.x series for nine
  1265. months, or until three months after the release of a stable 0.4.1.x:
  1266. whichever is longer. If you need longer-term support, please stick
  1267. with 0.3.5.x, which will we plan to support until Feb 2022.
  1268. Below are the changes since 0.4.0.4-rc. For a complete list of changes
  1269. since 0.3.5.7, see the ReleaseNotes file.
  1270. o Minor features (continuous integration):
  1271. - In Travis, tell timelimit to use stem's backtrace signals, and
  1272. launch python directly from timelimit, so python receives the
  1273. signals from timelimit, rather than make. Closes ticket 30117.
  1274. o Minor features (diagnostic):
  1275. - Add more diagnostic log messages in an attempt to solve the issue
  1276. of NUL bytes appearing in a microdescriptor cache. Related to
  1277. ticket 28223.
  1278. o Minor features (testing):
  1279. - Use the approx_time() function when setting the "Expires" header
  1280. in directory replies, to make them more testable. Needed for
  1281. ticket 30001.
  1282. o Minor bugfixes (rust):
  1283. - Abort on panic in all build profiles, instead of potentially
  1284. unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.
  1285. o Minor bugfixes (shellcheck):
  1286. - Look for scripts in their correct locations during "make
  1287. shellcheck". Previously we had looked in the wrong place during
  1288. out-of-tree builds. Fixes bug 30263; bugfix on 0.4.0.1-alpha.
  1289. o Minor bugfixes (testing):
  1290. - Check the time in the "Expires" header using approx_time(). Fixes
  1291. bug 30001; bugfix on 0.4.0.4-rc.
  1292. o Minor bugfixes (UI):
  1293. - Lower log level of unlink() errors during bootstrap. Fixes bug
  1294. 29930; bugfix on 0.4.0.1-alpha.
  1295. Changes in version 0.4.0.4-rc - 2019-04-11
  1296. Tor 0.4.0.4-rc is the first release candidate in its series; it fixes
  1297. several bugs from earlier versions, including some that had affected
  1298. stability, and one that prevented relays from working with NSS.
  1299. o Major bugfixes (NSS, relay):
  1300. - When running with NSS, disable TLS 1.2 ciphersuites that use
  1301. SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for
  1302. these ciphersuites don't work -- which caused relays to fail to
  1303. handshake with one another when these ciphersuites were enabled.
  1304. Fixes bug 29241; bugfix on 0.3.5.1-alpha.
  1305. o Minor features (bandwidth authority):
  1306. - Make bandwidth authorities ignore relays that are reported in the
  1307. bandwidth file with the flag "vote=0". This change allows us to
  1308. report unmeasured relays for diagnostic reasons without including
  1309. their bandwidth in the bandwidth authorities' vote. Closes
  1310. ticket 29806.
  1311. - When a directory authority is using a bandwidth file to obtain the
  1312. bandwidth values that will be included in the next vote, serve
  1313. this bandwidth file at /tor/status-vote/next/bandwidth. Closes
  1314. ticket 21377.
  1315. o Minor features (circuit padding):
  1316. - Stop warning about undefined behavior in the probability
  1317. distribution tests. Float division by zero may technically be
  1318. undefined behavior in C, but it's well defined in IEEE 754.
  1319. Partial backport of 29298. Closes ticket 29527; bugfix
  1320. on 0.4.0.1-alpha.
  1321. o Minor features (continuous integration):
  1322. - On Travis Rust builds, cleanup Rust registry and refrain from
  1323. caching the "target/" directory to speed up builds. Resolves
  1324. issue 29962.
  1325. o Minor features (dormant mode):
  1326. - Add a DormantCanceledByStartup option to tell Tor that it should
  1327. treat a startup event as cancelling any previous dormant state.
  1328. Integrators should use this option with caution: it should only be
  1329. used if Tor is being started because of something that the user
  1330. did, and not if Tor is being automatically started in the
  1331. background. Closes ticket 29357.
  1332. o Minor features (geoip):
  1333. - Update geoip and geoip6 to the April 2 2019 Maxmind GeoLite2
  1334. Country database. Closes ticket 29992.
  1335. o Minor features (NSS, diagnostic):
  1336. - Try to log an error from NSS (if there is any) and a more useful
  1337. description of our situation if we are using NSS and a call to
  1338. SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241.
  1339. o Minor bugfixes (security):
  1340. - Fix a potential double free bug when reading huge bandwidth files.
  1341. The issue is not exploitable in the current Tor network because
  1342. the vulnerable code is only reached when directory authorities
  1343. read bandwidth files, but bandwidth files come from a trusted
  1344. source (usually the authorities themselves). Furthermore, the
  1345. issue is only exploitable in rare (non-POSIX) 32-bit architectures,
  1346. which are not used by any of the current authorities. Fixes bug
  1347. 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by
  1348. Tobias Stoeckmann.
  1349. - Verify in more places that we are not about to create a buffer
  1350. with more than INT_MAX bytes, to avoid possible OOB access in the
  1351. event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and
  1352. fixed by Tobias Stoeckmann.
  1353. o Minor bugfix (continuous integration):
  1354. - Reset coverage state on disk after Travis CI has finished. This
  1355. should prevent future coverage merge errors from causing the test
  1356. suite for the "process" subsystem to fail. The process subsystem
  1357. was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix
  1358. on 0.2.9.15.
  1359. - Terminate test-stem if it takes more than 9.5 minutes to run.
  1360. (Travis terminates the job after 10 minutes of no output.)
  1361. Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.
  1362. o Minor bugfixes (bootstrap reporting):
  1363. - During bootstrap reporting, correctly distinguish pluggable
  1364. transports from plain proxies. Fixes bug 28925; bugfix
  1365. on 0.4.0.1-alpha.
  1366. o Minor bugfixes (C correctness):
  1367. - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug
  1368. 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning
  1369. CID 1444119.
  1370. o Minor bugfixes (circuitpadding testing):
  1371. - Minor tweaks to avoid rare test failures related to timers and
  1372. monotonic time. Fixes bug 29500; bugfix on 0.4.0.1-alpha.
  1373. o Minor bugfixes (directory authorities):
  1374. - Actually include the bandwidth-file-digest line in directory
  1375. authority votes. Fixes bug 29959; bugfix on 0.4.0.2-alpha.
  1376. o Minor bugfixes (logging):
  1377. - On Windows, when errors cause us to reload a consensus from disk,
  1378. tell the user that we are retrying at log level "notice".
  1379. Previously we only logged this information at "info", which was
  1380. confusing because the errors themselves were logged at "warning".
  1381. Improves previous fix for 28614. Fixes bug 30004; bugfix
  1382. on 0.4.0.2-alpha.
  1383. o Minor bugfixes (pluggable transports):
  1384. - Restore old behavior when it comes to discovering the path of a
  1385. given Pluggable Transport executable file. A change in
  1386. 0.4.0.1-alpha had broken this behavior on paths containing a
  1387. space. Fixes bug 29874; bugfix on 0.4.0.1-alpha.
  1388. o Minor bugfixes (testing):
  1389. - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a
  1390. recent test-network.sh to use new chutney features in CI. Fixes
  1391. bug 29703; bugfix on 0.2.9.1-alpha.
  1392. - Fix a test failure on Windows caused by an unexpected "BUG"
  1393. warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix
  1394. on 0.2.9.3-alpha.
  1395. o Minor bugfixes (TLS protocol):
  1396. - When classifying a client's selection of TLS ciphers, if the
  1397. client ciphers are not yet available, do not cache the result.
  1398. Previously, we had cached the unavailability of the cipher list
  1399. and never looked again, which in turn led us to assume that the
  1400. client only supported the ancient V1 link protocol. This, in turn,
  1401. was causing Stem integration tests to stall in some cases. Fixes
  1402. bug 30021; bugfix on 0.2.4.8-alpha.
  1403. o Code simplification and refactoring:
  1404. - Introduce a connection_dir_buf_add() helper function that detects
  1405. whether compression is in use, and adds a string accordingly.
  1406. Resolves issue 28816.
  1407. - Refactor handle_get_next_bandwidth() to use
  1408. connection_dir_buf_add(). Implements ticket 29897.
  1409. o Documentation:
  1410. - Clarify that Tor performs stream isolation among *Port listeners
  1411. by default. Resolves issue 29121.
  1412. Changes in version 0.4.0.3-alpha - 2019-03-22
  1413. Tor 0.4.0.3-alpha is the third in its series; it fixes several small
  1414. bugs from earlier versions.
  1415. o Minor features (address selection):
  1416. - Treat the subnet 100.64.0.0/10 as public for some purposes;
  1417. private for others. This subnet is the RFC 6598 (Carrier Grade
  1418. NAT) IP range, and is deployed by many ISPs as an alternative to
  1419. RFC 1918 that does not break existing internal networks. Tor now
  1420. blocks SOCKS and control ports on these addresses and warns users
  1421. if client ports or ExtORPorts are listening on a RFC 6598 address.
  1422. Closes ticket 28525. Patch by Neel Chauhan.
  1423. o Minor features (geoip):
  1424. - Update geoip and geoip6 to the March 4 2019 Maxmind GeoLite2
  1425. Country database. Closes ticket 29666.
  1426. o Minor bugfixes (circuitpadding):
  1427. - Inspect the circuit-level cell queue before sending padding, to
  1428. avoid sending padding when too much data is queued. Fixes bug
  1429. 29204; bugfix on 0.4.0.1-alpha.
  1430. o Minor bugfixes (logging):
  1431. - Correct a misleading error message when IPv4Only or IPv6Only is
  1432. used but the resolved address can not be interpreted as an address
  1433. of the specified IP version. Fixes bug 13221; bugfix on
  1434. 0.2.3.9-alpha. Patch from Kris Katterjohn.
  1435. - Log the correct port number for listening sockets when "auto" is
  1436. used to let Tor pick the port number. Previously, port 0 was
  1437. logged instead of the actual port number. Fixes bug 29144; bugfix
  1438. on 0.3.5.1-alpha. Patch from Kris Katterjohn.
  1439. - Stop logging a BUG() warning when Tor is waiting for exit
  1440. descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha.
  1441. o Minor bugfixes (memory management):
  1442. - Refactor the shared random state's memory management so that it
  1443. actually takes ownership of the shared random value pointers.
  1444. Fixes bug 29706; bugfix on 0.2.9.1-alpha.
  1445. o Minor bugfixes (memory management, testing):
  1446. - Stop leaking parts of the shared random state in the shared-random
  1447. unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.
  1448. o Minor bugfixes (pluggable transports):
  1449. - Fix an assertion failure crash bug when a pluggable transport is
  1450. terminated during the bootstrap phase. Fixes bug 29562; bugfix
  1451. on 0.4.0.1-alpha.
  1452. o Minor bugfixes (Rust, protover):
  1453. - Add a missing "Padding" value to the Rust implementation of
  1454. protover. Fixes bug 29631; bugfix on 0.4.0.1-alpha.
  1455. o Minor bugfixes (single onion services):
  1456. - Allow connections to single onion services to remain idle without
  1457. being disconnected. Previously, relays acting as rendezvous points
  1458. for single onion services were mistakenly closing idle rendezvous
  1459. circuits after 60 seconds, thinking that they were unused
  1460. directory-fetching circuits that had served their purpose. Fixes
  1461. bug 29665; bugfix on 0.2.1.26.
  1462. o Minor bugfixes (stats):
  1463. - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
  1464. relay and bridge extra-info documents. Fixes bug 29017; bugfix
  1465. on 0.3.1.1-alpha.
  1466. o Minor bugfixes (testing):
  1467. - Downgrade some LOG_ERR messages in the address/* tests to
  1468. warnings. The LOG_ERR messages were occurring when we had no
  1469. configured network. We were failing the unit tests, because we
  1470. backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug
  1471. 29530; bugfix on 0.3.5.8.
  1472. - Fix our gcov wrapper script to look for object files at the
  1473. correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha.
  1474. - Decrease the false positive rate of stochastic probability
  1475. distribution tests. Fixes bug 29693; bugfix on 0.4.0.1-alpha.
  1476. o Minor bugfixes (Windows, CI):
  1477. - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit
  1478. Windows Server 2012 R2 job. The remaining 2 jobs still provide
  1479. coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set
  1480. fast_finish, so failed jobs terminate the build immediately. Fixes
  1481. bug 29601; bugfix on 0.3.5.4-alpha.
  1482. Changes in version 0.3.5.8 - 2019-02-21
  1483. Tor 0.3.5.8 backports several fixes from later releases, including fixes
  1484. for an annoying SOCKS-parsing bug that affected users in earlier 0.3.5.x
  1485. releases.
  1486. It also includes a fix for a medium-severity security bug affecting Tor
  1487. 0.3.2.1-alpha and later. All Tor instances running an affected release
  1488. should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
  1489. o Major bugfixes (cell scheduler, KIST, security):
  1490. - Make KIST consider the outbuf length when computing what it can
  1491. put in the outbuf. Previously, KIST acted as though the outbuf
  1492. were empty, which could lead to the outbuf becoming too full. It
  1493. is possible that an attacker could exploit this bug to cause a Tor
  1494. client or relay to run out of memory and crash. Fixes bug 29168;
  1495. bugfix on 0.3.2.1-alpha. This issue is also being tracked as
  1496. TROVE-2019-001 and CVE-2019-8955.
  1497. o Major bugfixes (networking, backport from 0.4.0.2-alpha):
  1498. - Gracefully handle empty username/password fields in SOCKS5
  1499. username/password auth message and allow SOCKS5 handshake to
  1500. continue. Previously, we had rejected these handshakes, breaking
  1501. certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.
  1502. o Minor features (compilation, backport from 0.4.0.2-alpha):
  1503. - Compile correctly when OpenSSL is built with engine support
  1504. disabled, or with deprecated APIs disabled. Closes ticket 29026.
  1505. Patches from "Mangix".
  1506. o Minor features (geoip):
  1507. - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
  1508. Country database. Closes ticket 29478.
  1509. o Minor features (testing, backport from 0.4.0.2-alpha):
  1510. - Treat all unexpected ERR and BUG messages as test failures. Closes
  1511. ticket 28668.
  1512. o Minor bugfixes (onion service v3, client, backport from 0.4.0.1-alpha):
  1513. - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
  1514. connection waiting for a descriptor that we actually have in the
  1515. cache. It turns out that this can actually happen, though it is
  1516. rare. Now, tor will recover and retry the descriptor. Fixes bug
  1517. 28669; bugfix on 0.3.2.4-alpha.
  1518. o Minor bugfixes (IPv6, backport from 0.4.0.1-alpha):
  1519. - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
  1520. IPv6 socket was bound using an address family of AF_INET instead
  1521. of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
  1522. Kris Katterjohn.
  1523. o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
  1524. - Update Cargo.lock file to match the version made by the latest
  1525. version of Rust, so that "make distcheck" will pass again. Fixes
  1526. bug 29244; bugfix on 0.3.3.4-alpha.
  1527. o Minor bugfixes (client, clock skew, backport from 0.4.0.1-alpha):
  1528. - Select guards even if the consensus has expired, as long as the
  1529. consensus is still reasonably live. Fixes bug 24661; bugfix
  1530. on 0.3.0.1-alpha.
  1531. o Minor bugfixes (compilation, backport from 0.4.0.1-alpha):
  1532. - Compile correctly on OpenBSD; previously, we were missing some
  1533. headers required in order to detect it properly. Fixes bug 28938;
  1534. bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.
  1535. o Minor bugfixes (documentation, backport from 0.4.0.2-alpha):
  1536. - Describe the contents of the v3 onion service client authorization
  1537. files correctly: They hold public keys, not private keys. Fixes
  1538. bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".
  1539. o Minor bugfixes (logging, backport from 0.4.0.1-alpha):
  1540. - Rework rep_hist_log_link_protocol_counts() to iterate through all
  1541. link protocol versions when logging incoming/outgoing connection
  1542. counts. Tor no longer skips version 5, and we won't have to
  1543. remember to update this function when new link protocol version is
  1544. developed. Fixes bug 28920; bugfix on 0.2.6.10.
  1545. o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
  1546. - Log more information at "warning" level when unable to read a
  1547. private key; log more information at "info" level when unable to
  1548. read a public key. We had warnings here before, but they were lost
  1549. during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
  1550. o Minor bugfixes (misc, backport from 0.4.0.2-alpha):
  1551. - The amount of total available physical memory is now determined
  1552. using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
  1553. when it is defined and a 64-bit variant is not available. Fixes
  1554. bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.
  1555. o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
  1556. - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
  1557. than one private key for a hidden service. Fixes bug 29040; bugfix
  1558. on 0.3.5.1-alpha.
  1559. - In hs_cache_store_as_client() log an HSDesc we failed to parse at
  1560. "debug" level. Tor used to log it as a warning, which caused very
  1561. long log lines to appear for some users. Fixes bug 29135; bugfix
  1562. on 0.3.2.1-alpha.
  1563. - Stop logging "Tried to establish rendezvous on non-OR circuit..."
  1564. as a warning. Instead, log it as a protocol warning, because there
  1565. is nothing that relay operators can do to fix it. Fixes bug 29029;
  1566. bugfix on 0.2.5.7-rc.
  1567. o Minor bugfixes (tests, directory clients, backport from 0.4.0.1-alpha):
  1568. - Mark outdated dirservers when Tor only has a reasonably live
  1569. consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.
  1570. o Minor bugfixes (tests, backport from 0.4.0.2-alpha):
  1571. - Detect and suppress "bug" warnings from the util/time test on
  1572. Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
  1573. - Do not log an error-level message if we fail to find an IPv6
  1574. network interface from the unit tests. Fixes bug 29160; bugfix
  1575. on 0.2.7.3-rc.
  1576. o Minor bugfixes (usability, backport from 0.4.0.1-alpha):
  1577. - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
  1578. Some users took this phrasing to mean that the mentioned guard was
  1579. under their control or responsibility, which it is not. Fixes bug
  1580. 28895; bugfix on Tor 0.3.0.1-alpha.
  1581. Changes in version 0.3.4.11 - 2019-02-21
  1582. Tor 0.3.4.11 is the third stable release in its series. It includes
  1583. a fix for a medium-severity security bug affecting Tor 0.3.2.1-alpha and
  1584. later. All Tor instances running an affected release should upgrade to
  1585. 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
  1586. o Major bugfixes (cell scheduler, KIST, security):
  1587. - Make KIST consider the outbuf length when computing what it can
  1588. put in the outbuf. Previously, KIST acted as though the outbuf
  1589. were empty, which could lead to the outbuf becoming too full. It
  1590. is possible that an attacker could exploit this bug to cause a Tor
  1591. client or relay to run out of memory and crash. Fixes bug 29168;
  1592. bugfix on 0.3.2.1-alpha. This issue is also being tracked as
  1593. TROVE-2019-001 and CVE-2019-8955.
  1594. o Minor features (geoip):
  1595. - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
  1596. Country database. Closes ticket 29478.
  1597. o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
  1598. - Update Cargo.lock file to match the version made by the latest
  1599. version of Rust, so that "make distcheck" will pass again. Fixes
  1600. bug 29244; bugfix on 0.3.3.4-alpha.
  1601. o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
  1602. - Stop logging "Tried to establish rendezvous on non-OR circuit..."
  1603. as a warning. Instead, log it as a protocol warning, because there
  1604. is nothing that relay operators can do to fix it. Fixes bug 29029;
  1605. bugfix on 0.2.5.7-rc.
  1606. Changes in version 0.3.3.12 - 2019-02-21
  1607. Tor 0.3.3.12 fixes a medium-severity security bug affecting Tor
  1608. 0.3.2.1-alpha and later. All Tor instances running an affected release
  1609. should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
  1610. This release marks the end of support for the Tor 0.3.3.x series. We
  1611. recommend that users switch to either the Tor 0.3.4 series (supported
  1612. until at least 10 June 2019), or the Tor 0.3.5 series, which will
  1613. receive long-term support until at least 1 Feb 2022.
  1614. o Major bugfixes (cell scheduler, KIST, security):
  1615. - Make KIST consider the outbuf length when computing what it can
  1616. put in the outbuf. Previously, KIST acted as though the outbuf
  1617. were empty, which could lead to the outbuf becoming too full. It
  1618. is possible that an attacker could exploit this bug to cause a Tor
  1619. client or relay to run out of memory and crash. Fixes bug 29168;
  1620. bugfix on 0.3.2.1-alpha. This issue is also being tracked as
  1621. TROVE-2019-001 and CVE-2019-8955.
  1622. o Minor features (geoip):
  1623. - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
  1624. Country database. Closes ticket 29478.
  1625. o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
  1626. - Update Cargo.lock file to match the version made by the latest
  1627. version of Rust, so that "make distcheck" will pass again. Fixes
  1628. bug 29244; bugfix on 0.3.3.4-alpha.
  1629. o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
  1630. - Stop logging "Tried to establish rendezvous on non-OR circuit..."
  1631. as a warning. Instead, log it as a protocol warning, because there
  1632. is nothing that relay operators can do to fix it. Fixes bug 29029;
  1633. bugfix on 0.2.5.7-rc.
  1634. Changes in version 0.4.0.2-alpha - 2019-02-21
  1635. Tor 0.4.0.2-alpha is the second alpha in its series; it fixes several
  1636. bugs from earlier versions, including several that had broken
  1637. backward compatibility.
  1638. It also includes a fix for a medium-severity security bug affecting Tor
  1639. 0.3.2.1-alpha and later. All Tor instances running an affected release
  1640. should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
  1641. o Major bugfixes (cell scheduler, KIST, security):
  1642. - Make KIST consider the outbuf length when computing what it can
  1643. put in the outbuf. Previously, KIST acted as though the outbuf
  1644. were empty, which could lead to the outbuf becoming too full. It
  1645. is possible that an attacker could exploit this bug to cause a Tor
  1646. client or relay to run out of memory and crash. Fixes bug 29168;
  1647. bugfix on 0.3.2.1-alpha. This issue is also being tracked as
  1648. TROVE-2019-001 and CVE-2019-8955.
  1649. o Major bugfixes (networking):
  1650. - Gracefully handle empty username/password fields in SOCKS5
  1651. username/password auth messsage and allow SOCKS5 handshake to
  1652. continue. Previously, we had rejected these handshakes, breaking
  1653. certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.
  1654. o Major bugfixes (windows, startup):
  1655. - When reading a consensus file from disk, detect whether it was
  1656. written in text mode, and re-read it in text mode if so. Always
  1657. write consensus files in binary mode so that we can map them into
  1658. memory later. Previously, we had written in text mode, which
  1659. confused us when we tried to map the file on windows. Fixes bug
  1660. 28614; bugfix on 0.4.0.1-alpha.
  1661. o Minor features (compilation):
  1662. - Compile correctly when OpenSSL is built with engine support
  1663. disabled, or with deprecated APIs disabled. Closes ticket 29026.
  1664. Patches from "Mangix".
  1665. o Minor features (developer tooling):
  1666. - Check that bugfix versions in changes files look like Tor versions
  1667. from the versions spec. Warn when bugfixes claim to be on a future
  1668. release. Closes ticket 27761.
  1669. - Provide a git pre-commit hook that disallows committing if we have
  1670. any failures in our code and changelog formatting checks. It is
  1671. now available in scripts/maint/pre-commit.git-hook. Implements
  1672. feature 28976.
  1673. o Minor features (directory authority):
  1674. - When a directory authority is using a bandwidth file to obtain
  1675. bandwidth values, include the digest of that file in the vote.
  1676. Closes ticket 26698.
  1677. o Minor features (geoip):
  1678. - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
  1679. Country database. Closes ticket 29478.
  1680. o Minor features (testing):
  1681. - Treat all unexpected ERR and BUG messages as test failures. Closes
  1682. ticket 28668.
  1683. o Minor bugfixes (build, compatibility, rust):
  1684. - Update Cargo.lock file to match the version made by the latest
  1685. version of Rust, so that "make distcheck" will pass again. Fixes
  1686. bug 29244; bugfix on 0.3.3.4-alpha.
  1687. o Minor bugfixes (compilation):
  1688. - Fix compilation warnings in test_circuitpadding.c. Fixes bug
  1689. 29169; bugfix on 0.4.0.1-alpha.
  1690. - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug
  1691. 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn.
  1692. o Minor bugfixes (documentation):
  1693. - Describe the contents of the v3 onion service client authorization
  1694. files correctly: They hold public keys, not private keys. Fixes
  1695. bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".
  1696. o Minor bugfixes (linux seccomp sandbox):
  1697. - Fix startup crash when experimental sandbox support is enabled.
  1698. Fixes bug 29150; bugfix on 0.4.0.1-alpha. Patch by Peter Gerber.
  1699. o Minor bugfixes (logging):
  1700. - Avoid logging that we are relaxing a circuit timeout when that
  1701. timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha.
  1702. - Log more information at "warning" level when unable to read a
  1703. private key; log more information at "info" level when unable to
  1704. read a public key. We had warnings here before, but they were lost
  1705. during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
  1706. o Minor bugfixes (misc):
  1707. - The amount of total available physical memory is now determined
  1708. using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
  1709. when it is defined and a 64-bit variant is not available. Fixes
  1710. bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.
  1711. o Minor bugfixes (onion services):
  1712. - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
  1713. than one private key for a hidden service. Fixes bug 29040; bugfix
  1714. on 0.3.5.1-alpha.
  1715. - In hs_cache_store_as_client() log an HSDesc we failed to parse at
  1716. "debug" level. Tor used to log it as a warning, which caused very
  1717. long log lines to appear for some users. Fixes bug 29135; bugfix
  1718. on 0.3.2.1-alpha.
  1719. - Stop logging "Tried to establish rendezvous on non-OR circuit..."
  1720. as a warning. Instead, log it as a protocol warning, because there
  1721. is nothing that relay operators can do to fix it. Fixes bug 29029;
  1722. bugfix on 0.2.5.7-rc.
  1723. o Minor bugfixes (scheduler):
  1724. - When re-adding channels to the pending list, check the correct
  1725. channel's sched_heap_idx. This issue has had no effect in mainline
  1726. Tor, but could have led to bugs down the road in improved versions
  1727. of our circuit scheduling code. Fixes bug 29508; bugfix
  1728. on 0.3.2.10.
  1729. o Minor bugfixes (tests):
  1730. - Fix intermittent failures on an adaptive padding test. Fixes one
  1731. case of bug 29122; bugfix on 0.4.0.1-alpha.
  1732. - Disable an unstable circuit-padding test that was failing
  1733. intermittently because of an ill-defined small histogram. Such
  1734. histograms will be allowed again after 29298 is implemented. Fixes
  1735. a second case of bug 29122; bugfix on 0.4.0.1-alpha.
  1736. - Detect and suppress "bug" warnings from the util/time test on
  1737. Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
  1738. - Do not log an error-level message if we fail to find an IPv6
  1739. network interface from the unit tests. Fixes bug 29160; bugfix
  1740. on 0.2.7.3-rc.
  1741. o Documentation:
  1742. - In the manpage entry describing MapAddress torrc setting, use
  1743. example IP addresses from ranges specified for use in documentation
  1744. by RFC 5737. Resolves issue 28623.
  1745. o Removed features:
  1746. - Remove the old check-tor script. Resolves issue 29072.
  1747. Changes in version 0.4.0.1-alpha - 2019-01-18
  1748. Tor 0.4.0.1-alpha is the first release in the new 0.4.0.x series. It
  1749. introduces improved features for power and bandwidth conservation,
  1750. more accurate reporting of bootstrap progress for user interfaces, and
  1751. an experimental backend for an exciting new adaptive padding feature.
  1752. There is also the usual assortment of bugfixes and minor features, all
  1753. described below.
  1754. o Major features (battery management, client, dormant mode):
  1755. - When Tor is running as a client, and it is unused for a long time,
  1756. it can now enter a "dormant" state. When Tor is dormant, it avoids
  1757. network and CPU activity until it is reawoken either by a user
  1758. request or by a controller command. For more information, see the
  1759. configuration options starting with "Dormant". Implements tickets
  1760. 2149 and 28335.
  1761. - The client's memory of whether it is "dormant", and how long it
  1762. has spent idle, persists across invocations. Implements
  1763. ticket 28624.
  1764. - There is a DormantOnFirstStartup option that integrators can use
  1765. if they expect that in many cases, Tor will be installed but
  1766. not used.
  1767. o Major features (bootstrap reporting):
  1768. - When reporting bootstrap progress, report the first connection
  1769. uniformly, regardless of whether it's a connection for building
  1770. application circuits. This allows finer-grained reporting of early
  1771. progress than previously possible, with the improvements of ticket
  1772. 27169. Closes tickets 27167 and 27103. Addresses ticket 27308.
  1773. - When reporting bootstrap progress, treat connecting to a proxy or
  1774. pluggable transport as separate from having successfully used that
  1775. proxy or pluggable transport to connect to a relay. Closes tickets
  1776. 27100 and 28884.
  1777. o Major features (circuit padding):
  1778. - Implement preliminary support for the circuit padding portion of
  1779. Proposal 254. The implementation supports Adaptive Padding (aka
  1780. WTF-PAD) state machines for use between experimental clients and
  1781. relays. Support is also provided for APE-style state machines that
  1782. use probability distributions instead of histograms to specify
  1783. inter-packet delay. At the moment, Tor does not provide any
  1784. padding state machines that are used in normal operation: for now,
  1785. this feature exists solely for experimentation. Closes
  1786. ticket 28142.
  1787. o Major features (refactoring):
  1788. - Tor now uses an explicit list of its own subsystems when
  1789. initializing and shutting down. Previously, these systems were
  1790. managed implicitly in various places throughout the codebase.
  1791. (There may still be some subsystems using the old system.) Closes
  1792. ticket 28330.
  1793. o Minor features (bootstrap reporting):
  1794. - When reporting bootstrap progress, stop distinguishing between
  1795. situations where only internal paths are available and situations
  1796. where external paths are available. Previously, Tor would often
  1797. erroneously report that it had only internal paths. Closes
  1798. ticket 27402.
  1799. o Minor features (continuous integration):
  1800. - Log Python version during each Travis CI job. Resolves
  1801. issue 28551.
  1802. o Minor features (controller):
  1803. - Add a DROPOWNERSHIP command to undo the effects of TAKEOWNERSHIP.
  1804. Implements ticket 28843.
  1805. o Minor features (developer tooling):
  1806. - Provide a git hook script to prevent "fixup!" and "squash!"
  1807. commits from ending up in the master branch, as scripts/main/pre-
  1808. push.git-hook. Closes ticket 27993.
  1809. o Minor features (directory authority):
  1810. - Directory authorities support a new consensus algorithm, under
  1811. which the family lines in microdescriptors are encoded in a
  1812. canonical form. This change makes family lines more compressible
  1813. in transit, and on the client. Closes ticket 28266; implements
  1814. proposal 298.
  1815. o Minor features (directory authority, relay):
  1816. - Authorities now vote on a "StaleDesc" flag to indicate that a
  1817. relay's descriptor is so old that the relay should upload again
  1818. soon. Relays treat this flag as a signal to upload a new
  1819. descriptor. This flag will eventually let us remove the
  1820. 'published' date from routerstatus entries, and make our consensus
  1821. diffs much smaller. Closes ticket 26770; implements proposal 293.
  1822. o Minor features (fallback directory mirrors):
  1823. - Update the fallback whitelist based on operator opt-ins and opt-
  1824. outs. Closes ticket 24805, patch by Phoul.
  1825. o Minor features (FreeBSD):
  1826. - On FreeBSD-based systems, warn relay operators if the
  1827. "net.inet.ip.random_id" sysctl (IP ID randomization) is disabled.
  1828. Closes ticket 28518.
  1829. o Minor features (HTTP standards compliance):
  1830. - Stop sending the header "Content-type: application/octet-stream"
  1831. along with transparently compressed documents: this confused
  1832. browsers. Closes ticket 28100.
  1833. o Minor features (IPv6):
  1834. - We add an option ClientAutoIPv6ORPort, to make clients randomly
  1835. prefer a node's IPv4 or IPv6 ORPort. The random preference is set
  1836. every time a node is loaded from a new consensus or bridge config.
  1837. We expect that this option will enable clients to bootstrap more
  1838. quickly without having to determine whether they support IPv4,
  1839. IPv6, or both. Closes ticket 27490. Patch by Neel Chauhan.
  1840. - When using addrs_in_same_network_family(), avoid choosing circuit
  1841. paths that pass through the same IPv6 subnet more than once.
  1842. Previously, we only checked IPv4 subnets. Closes ticket 24393.
  1843. Patch by Neel Chauhan.
  1844. o Minor features (log messages):
  1845. - Improve log message in v3 onion services that could print out
  1846. negative revision counters. Closes ticket 27707. Patch
  1847. by "ffmancera".
  1848. o Minor features (memory usage):
  1849. - Save memory by storing microdescriptor family lists with a more
  1850. compact representation. Closes ticket 27359.
  1851. - Tor clients now use mmap() to read consensus files from disk, so
  1852. that they no longer need keep the full text of a consensus in
  1853. memory when parsing it or applying a diff. Closes ticket 27244.
  1854. o Minor features (parsing):
  1855. - Directory authorities now validate that router descriptors and
  1856. ExtraInfo documents are in a valid subset of UTF-8, and reject
  1857. them if they are not. Closes ticket 27367.
  1858. o Minor features (performance):
  1859. - Cache the results of summarize_protocol_flags(), so that we don't
  1860. have to parse the same protocol-versions string over and over.
  1861. This should save us a huge number of malloc calls on startup, and
  1862. may reduce memory fragmentation with some allocators. Closes
  1863. ticket 27225.
  1864. - Remove a needless memset() call from get_token_arguments, thereby
  1865. speeding up the tokenization of directory objects by about 20%.
  1866. Closes ticket 28852.
  1867. - Replace parse_short_policy() with a faster implementation, to
  1868. improve microdescriptor parsing time. Closes ticket 28853.
  1869. - Speed up directory parsing a little by avoiding use of the non-
  1870. inlined strcmp_len() function. Closes ticket 28856.
  1871. - Speed up microdescriptor parsing by about 30%, to help improve
  1872. startup time. Closes ticket 28839.
  1873. o Minor features (pluggable transports):
  1874. - Add support for emitting STATUS updates to Tor's control port from
  1875. a pluggable transport process. Closes ticket 28846.
  1876. - Add support for logging to Tor's logging subsystem from a
  1877. pluggable transport process. Closes ticket 28180.
  1878. o Minor features (process management):
  1879. - Add a new process API for handling child processes. This new API
  1880. allows Tor to have bi-directional communication with child
  1881. processes on both Unix and Windows. Closes ticket 28179.
  1882. - Use the subsystem manager to initialize and shut down the process
  1883. module. Closes ticket 28847.
  1884. o Minor features (relay):
  1885. - When listing relay families, list them in canonical form including
  1886. the relay's own identity, and try to give a more useful set of
  1887. warnings. Part of ticket 28266 and proposal 298.
  1888. o Minor features (required protocols):
  1889. - Before exiting because of a missing required protocol, Tor will
  1890. now check the publication time of the consensus, and not exit
  1891. unless the consensus is newer than the Tor program's own release
  1892. date. Previously, Tor would not check the consensus publication
  1893. time, and so might exit because of a missing protocol that might
  1894. no longer be required in a current consensus. Implements proposal
  1895. 297; closes ticket 27735.
  1896. o Minor features (testing):
  1897. - Allow a HeartbeatPeriod of less than 30 minutes in testing Tor
  1898. networks. Closes ticket 28840. Patch by Rob Jansen.
  1899. o Minor bugfixes (client, clock skew):
  1900. - Bootstrap successfully even when Tor's clock is behind the clocks
  1901. on the authorities. Fixes bug 28591; bugfix on 0.2.0.9-alpha.
  1902. - Select guards even if the consensus has expired, as long as the
  1903. consensus is still reasonably live. Fixes bug 24661; bugfix
  1904. on 0.3.0.1-alpha.
  1905. o Minor bugfixes (compilation):
  1906. - Compile correctly on OpenBSD; previously, we were missing some
  1907. headers required in order to detect it properly. Fixes bug 28938;
  1908. bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.
  1909. o Minor bugfixes (directory clients):
  1910. - Mark outdated dirservers when Tor only has a reasonably live
  1911. consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.
  1912. o Minor bugfixes (directory mirrors):
  1913. - Even when a directory mirror's clock is behind the clocks on the
  1914. authorities, we now allow the mirror to serve "future"
  1915. consensuses. Fixes bug 28654; bugfix on 0.3.0.1-alpha.
  1916. o Minor bugfixes (DNS):
  1917. - Gracefully handle an empty or absent resolve.conf file by falling
  1918. back to using "localhost" as a DNS server (and hoping it works).
  1919. Previously, we would just stop running as an exit. Fixes bug
  1920. 21900; bugfix on 0.2.1.10-alpha.
  1921. o Minor bugfixes (guards):
  1922. - In count_acceptable_nodes(), the minimum number is now one bridge
  1923. or guard node, and two non-guard nodes for a circuit. Previously,
  1924. we had added up the sum of all nodes with a descriptor, but that
  1925. could cause us to build failing circuits when we had either too
  1926. many bridges or not enough guard nodes. Fixes bug 25885; bugfix on
  1927. 0.2.3.1-alpha. Patch by Neel Chauhan.
  1928. o Minor bugfixes (IPv6):
  1929. - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
  1930. IPv6 socket was bound using an address family of AF_INET instead
  1931. of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
  1932. Kris Katterjohn.
  1933. o Minor bugfixes (logging):
  1934. - Rework rep_hist_log_link_protocol_counts() to iterate through all
  1935. link protocol versions when logging incoming/outgoing connection
  1936. counts. Tor no longer skips version 5, and we won't have to
  1937. remember to update this function when new link protocol version is
  1938. developed. Fixes bug 28920; bugfix on 0.2.6.10.
  1939. o Minor bugfixes (networking):
  1940. - Introduce additional checks into tor_addr_parse() to reject
  1941. certain incorrect inputs that previously were not detected. Fixes
  1942. bug 23082; bugfix on 0.2.0.10-alpha.
  1943. o Minor bugfixes (onion service v3, client):
  1944. - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
  1945. connection waiting for a descriptor that we actually have in the
  1946. cache. It turns out that this can actually happen, though it is
  1947. rare. Now, tor will recover and retry the descriptor. Fixes bug
  1948. 28669; bugfix on 0.3.2.4-alpha.
  1949. o Minor bugfixes (periodic events):
  1950. - Refrain from calling routerlist_remove_old_routers() from
  1951. check_descriptor_callback(). Instead, create a new hourly periodic
  1952. event. Fixes bug 27929; bugfix on 0.2.8.1-alpha.
  1953. o Minor bugfixes (pluggable transports):
  1954. - Make sure that data is continously read from standard output and
  1955. standard error pipes of a pluggable transport child-process, to
  1956. avoid deadlocking when a pipe's buffer is full. Fixes bug 26360;
  1957. bugfix on 0.2.3.6-alpha.
  1958. o Minor bugfixes (unit tests):
  1959. - Instead of relying on hs_free_all() to clean up all onion service
  1960. objects in test_build_descriptors(), we now deallocate them one by
  1961. one. This lets Coverity know that we are not leaking memory there
  1962. and fixes CID 1442277. Fixes bug 28989; bugfix on 0.3.5.1-alpha.
  1963. o Minor bugfixes (usability):
  1964. - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
  1965. Some users took this phrasing to mean that the mentioned guard was
  1966. under their control or responsibility, which it is not. Fixes bug
  1967. 28895; bugfix on Tor 0.3.0.1-alpha.
  1968. o Code simplification and refactoring:
  1969. - Reimplement NETINFO cell parsing and generation to rely on
  1970. trunnel-generated wire format handling code. Closes ticket 27325.
  1971. - Remove unnecessary unsafe code from the Rust macro "cstr!". Closes
  1972. ticket 28077.
  1973. - Rework SOCKS wire format handling to rely on trunnel-generated
  1974. parsing/generation code. Resolves ticket 27620.
  1975. - Split out bootstrap progress reporting from control.c into a
  1976. separate file. Part of ticket 27402.
  1977. - The .may_include files that we use to describe our directory-by-
  1978. directory dependency structure now describe a noncircular
  1979. dependency graph over the directories that they cover. Our
  1980. checkIncludes.py tool now enforces this noncircularity. Closes
  1981. ticket 28362.
  1982. o Documentation:
  1983. - Mention that you cannot add a new onion service if Tor is already
  1984. running with Sandbox enabled. Closes ticket 28560.
  1985. - Improve ControlPort documentation. Mention that it accepts
  1986. address:port pairs, and can be used multiple times. Closes
  1987. ticket 28805.
  1988. - Document the exact output of "tor --version". Closes ticket 28889.
  1989. o Removed features:
  1990. - Stop responding to the 'GETINFO status/version/num-concurring' and
  1991. 'GETINFO status/version/num-versioning' control port commands, as
  1992. those were deprecated back in 0.2.0.30. Also stop listing them in
  1993. output of 'GETINFO info/names'. Resolves ticket 28757.
  1994. - The scripts used to generate and maintain the list of fallback
  1995. directories have been extracted into a new "fallback-scripts"
  1996. repository. Closes ticket 27914.
  1997. o Testing:
  1998. - Run shellcheck for scripts in the in scripts/ directory. Closes
  1999. ticket 28058.
  2000. - Add unit tests for tokenize_string() and get_next_token()
  2001. functions. Resolves ticket 27625.
  2002. o Code simplification and refactoring (onion service v3):
  2003. - Consolidate the authorized client descriptor cookie computation
  2004. code from client and service into one function. Closes
  2005. ticket 27549.
  2006. o Code simplification and refactoring (shell scripts):
  2007. - Cleanup scan-build.sh to silence shellcheck warnings. Closes
  2008. ticket 28007.
  2009. - Fix issues that shellcheck found in chutney-git-bisect.sh.
  2010. Resolves ticket 28006.
  2011. - Fix issues that shellcheck found in updateRustDependencies.sh.
  2012. Resolves ticket 28012.
  2013. - Fix shellcheck warnings in cov-diff script. Resolves issue 28009.
  2014. - Fix shellcheck warnings in run_calltool.sh. Resolves ticket 28011.
  2015. - Fix shellcheck warnings in run_trunnel.sh. Resolves issue 28010.
  2016. - Fix shellcheck warnings in scripts/test/coverage. Resolves
  2017. issue 28008.
  2018. Changes in version 0.3.3.11 - 2019-01-07
  2019. Tor 0.3.3.11 backports numerous fixes from later versions of Tor.
  2020. numerous fixes, including an important fix for anyone using OpenSSL
  2021. 1.1.1. Anyone running an earlier version of Tor 0.3.3 should upgrade
  2022. to this version, or to a later series.
  2023. As a reminder, support the Tor 0.3.3 series will end on 22 Feb 2019.
  2024. We anticipate that this will be the last release of Tor 0.3.3, unless
  2025. some major bug is before then. Some time between now and then, users
  2026. should switch to either the Tor 0.3.4 series (supported until at least
  2027. 10 June 2019), or the Tor 0.3.5 series, which will receive long-term
  2028. support until at least 1 Feb 2022.
  2029. o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha):
  2030. - Fix our usage of named groups when running as a TLS 1.3 client in
  2031. OpenSSL 1.1.1. Previously, we only initialized EC groups when
  2032. running as a relay, which caused clients to fail to negotiate TLS
  2033. 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
  2034. support was added).
  2035. o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
  2036. - Fix a use-after-free error that could be caused by passing Tor an
  2037. impossible set of options that would fail during options_act().
  2038. Fixes bug 27708; bugfix on 0.3.3.1-alpha.
  2039. o Minor features (continuous integration, backport from 0.3.5.1-alpha):
  2040. - Only run one online rust build in Travis, to reduce network
  2041. errors. Skip offline rust builds on Travis for Linux gcc, because
  2042. they're redundant. Implements ticket 27252.
  2043. - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
  2044. duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
  2045. Linux with default settings, because all the non-default builds
  2046. use gcc on Linux. Implements ticket 27252.
  2047. o Minor features (continuous integration, backport from 0.3.5.3-alpha):
  2048. - Use the Travis Homebrew addon to install packages on macOS during
  2049. Travis CI. The package list is the same, but the Homebrew addon
  2050. does not do a `brew update` by default. Implements ticket 27738.
  2051. o Minor features (fallback directory list, backport from 0.3.5.6-rc):
  2052. - Replace the 150 fallbacks originally introduced in Tor
  2053. 0.3.3.1-alpha in January 2018 (of which ~115 were still
  2054. functional), with a list of 157 fallbacks (92 new, 65 existing, 85
  2055. removed) generated in December 2018. Closes ticket 24803.
  2056. o Minor features (geoip):
  2057. - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2
  2058. Country database. Closes ticket 29012.
  2059. o Minor features (OpenSSL bug workaround, backport from 0.3.5.7):
  2060. - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
  2061. key export function from handling long labels. When this bug is
  2062. detected, Tor will disable TLS 1.3. We recommend upgrading to a
  2063. version of OpenSSL without this bug when it becomes available.
  2064. Closes ticket 28973.
  2065. o Minor bugfixes (relay statistics, backport from 0.3.5.7):
  2066. - Update relay descriptor on bandwidth changes only when the uptime
  2067. is smaller than 24h, in order to reduce the efficiency of guard
  2068. discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
  2069. o Minor bugfixes (C correctness, backport from 0.3.5.4-alpha):
  2070. - Avoid undefined behavior in an end-of-string check when parsing
  2071. the BEGIN line in a directory object. Fixes bug 28202; bugfix
  2072. on 0.2.0.3-alpha.
  2073. o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
  2074. - Rewrite our assertion macros so that they no longer suppress the
  2075. compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
  2076. o Minor bugfixes (compilation, backport from 0.3.5.5-alpha):
  2077. - Initialize a variable unconditionally in aes_new_cipher(), since
  2078. some compilers cannot tell that we always initialize it before
  2079. use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
  2080. o Minor bugfixes (directory authority, backport from 0.3.5.4-alpha):
  2081. - Log additional info when we get a relay that shares an ed25519 ID
  2082. with a different relay, instead making a BUG() warning. Fixes bug
  2083. 27800; bugfix on 0.3.2.1-alpha.
  2084. o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha):
  2085. - When a user requests a group-readable DataDirectory, give it to
  2086. them. Previously, when the DataDirectory and the CacheDirectory
  2087. were the same, the default setting (0) for
  2088. CacheDirectoryGroupReadable would override the setting for
  2089. DataDirectoryGroupReadable. Fixes bug 26913; bugfix
  2090. on 0.3.3.1-alpha.
  2091. o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
  2092. - When the onion service directory can't be created or has the wrong
  2093. permissions, do not log a stack trace. Fixes bug 27335; bugfix
  2094. on 0.3.2.1-alpha.
  2095. o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
  2096. - Close all SOCKS request (for the same .onion) if the newly fetched
  2097. descriptor is unusable. Before that, we would close only the first
  2098. one leaving the other hanging and let to time out by themselves.
  2099. Fixes bug 27410; bugfix on 0.3.2.1-alpha.
  2100. o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
  2101. - Don't warn so loudly when Tor is unable to decode an onion
  2102. descriptor. This can now happen as a normal use case if a client
  2103. gets a descriptor with client authorization but the client is not
  2104. authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
  2105. o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc):
  2106. - When deleting an ephemeral onion service (DEL_ONION), do not close
  2107. any rendezvous circuits in order to let the existing client
  2108. connections finish by themselves or closed by the application. The
  2109. HS v2 is doing that already so now we have the same behavior for
  2110. all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
  2111. o Minor bugfixes (HTTP tunnel):
  2112. - Fix a bug warning when closing an HTTP tunnel connection due to
  2113. an HTTP request we couldn't handle. Fixes bug 26470; bugfix on
  2114. 0.3.2.1-alpha.
  2115. o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha):
  2116. - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
  2117. bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
  2118. o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
  2119. - Ensure circuitmux queues are empty before scheduling or sending
  2120. padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
  2121. o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
  2122. - Reject protocol names containing bytes other than alphanumeric
  2123. characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
  2124. on 0.2.9.4-alpha.
  2125. o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
  2126. - Compute protover votes correctly in the rust version of the
  2127. protover code. Previously, the protover rewrite in 24031 allowed
  2128. repeated votes from the same voter for the same protocol version
  2129. to be counted multiple times in protover_compute_vote(). Fixes bug
  2130. 27649; bugfix on 0.3.3.5-rc.
  2131. - Reject protover names that contain invalid characters. Fixes bug
  2132. 27687; bugfix on 0.3.3.1-alpha.
  2133. o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
  2134. - protover_all_supported() would attempt to allocate up to 16GB on
  2135. some inputs, leading to a potential memory DoS. Fixes bug 27206;
  2136. bugfix on 0.3.3.5-rc.
  2137. o Minor bugfixes (rust, backport from 0.3.5.4-alpha):
  2138. - Fix a potential null dereference in protover_all_supported(). Add
  2139. a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
  2140. - Return a string that can be safely freed by C code, not one
  2141. created by the rust allocator, in protover_all_supported(). Fixes
  2142. bug 27740; bugfix on 0.3.3.1-alpha.
  2143. - Fix an API mismatch in the rust implementation of
  2144. protover_compute_vote(). This bug could have caused crashes on any
  2145. directory authorities running Tor with Rust (which we do not yet
  2146. recommend). Fixes bug 27741; bugfix on 0.3.3.6.
  2147. o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
  2148. - If a unit test running in a subprocess exits abnormally or with a
  2149. nonzero status code, treat the test as having failed, even if the
  2150. test reported success. Without this fix, memory leaks don't cause
  2151. the tests to fail, even with LeakSanitizer. Fixes bug 27658;
  2152. bugfix on 0.2.2.4-alpha.
  2153. o Minor bugfixes (testing, backport from 0.3.5.4-alpha):
  2154. - Treat backtrace test failures as expected on BSD-derived systems
  2155. (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
  2156. (FreeBSD failures have been treated as expected since 18204 in
  2157. 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
  2158. o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc):
  2159. - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
  2160. bugfix on 0.3.0.1-alpha.
  2161. Changes in version 0.3.4.10 - 2019-01-07
  2162. Tor 0.3.4.9 is the second stable release in its series; it backports
  2163. numerous fixes, including an important fix for relays, and for anyone
  2164. using OpenSSL 1.1.1. Anyone running an earlier version of Tor 0.3.4
  2165. should upgrade.
  2166. As a reminder, the Tor 0.3.4 series will be supported until 10 June
  2167. 2019. Some time between now and then, users should switch to the Tor
  2168. 0.3.5 series, which will receive long-term support until at least 1
  2169. Feb 2022.
  2170. o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha):
  2171. - Fix our usage of named groups when running as a TLS 1.3 client in
  2172. OpenSSL 1.1.1. Previously, we only initialized EC groups when
  2173. running as a relay, which caused clients to fail to negotiate TLS
  2174. 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
  2175. support was added).
  2176. o Major bugfixes (relay, directory, backport from 0.3.5.7):
  2177. - Always reactivate linked connections in the main loop so long as
  2178. any linked connection has been active. Previously, connections
  2179. serving directory information wouldn't get reactivated after the
  2180. first chunk of data was sent (usually 32KB), which would prevent
  2181. clients from bootstrapping. Fixes bug 28912; bugfix on
  2182. 0.3.4.1-alpha. Patch by "cypherpunks3".
  2183. o Minor features (continuous integration, Windows, backport from 0.3.5.6-rc):
  2184. - Always show the configure and test logs, and upload them as build
  2185. artifacts, when building for Windows using Appveyor CI.
  2186. Implements 28459.
  2187. o Minor features (controller, backport from 0.3.5.1-alpha):
  2188. - For purposes of CIRC_BW-based dropped cell detection, track half-
  2189. closed stream ids, and allow their ENDs, SENDMEs, DATA and path
  2190. bias check cells to arrive without counting it as dropped until
  2191. either the END arrives, or the windows are empty. Closes
  2192. ticket 25573.
  2193. o Minor features (fallback directory list, backport from 0.3.5.6-rc):
  2194. - Replace the 150 fallbacks originally introduced in Tor
  2195. 0.3.3.1-alpha in January 2018 (of which ~115 were still
  2196. functional), with a list of 157 fallbacks (92 new, 65 existing, 85
  2197. removed) generated in December 2018. Closes ticket 24803.
  2198. o Minor features (geoip):
  2199. - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2
  2200. Country database. Closes ticket 28395.
  2201. o Minor features (OpenSSL bug workaround, backport from 0.3.5.7):
  2202. - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
  2203. key export function from handling long labels. When this bug is
  2204. detected, Tor will disable TLS 1.3. We recommend upgrading to a
  2205. version of OpenSSL without this bug when it becomes available.
  2206. Closes ticket 28973.
  2207. o Minor bugfixes (compilation, backport from 0.3.5.5-alpha):
  2208. - Initialize a variable unconditionally in aes_new_cipher(), since
  2209. some compilers cannot tell that we always initialize it before
  2210. use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
  2211. o Minor bugfixes (connection, relay, backport from 0.3.5.5-alpha):
  2212. - Avoid a logging a BUG() stacktrace when closing connection held
  2213. open because the write side is rate limited but not the read side.
  2214. Now, the connection read side is simply shut down until Tor is
  2215. able to flush the connection and close it. Fixes bug 27750; bugfix
  2216. on 0.3.4.1-alpha.
  2217. o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.5-alpha):
  2218. - Manually configure the zstd compiler options, when building using
  2219. mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does
  2220. not come with a pkg-config file. Fixes bug 28454; bugfix
  2221. on 0.3.4.1-alpha.
  2222. - Stop using an external OpenSSL install, and stop installing MSYS2
  2223. packages, when building using mingw on Appveyor Windows CI. Fixes
  2224. bug 28399; bugfix on 0.3.4.1-alpha.
  2225. o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.6-rc):
  2226. - Explicitly specify the path to the OpenSSL library and do not
  2227. download OpenSSL from Pacman, but instead use the library that is
  2228. already provided by AppVeyor. Fixes bug 28574; bugfix on master.
  2229. o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha):
  2230. - When a user requests a group-readable DataDirectory, give it to
  2231. them. Previously, when the DataDirectory and the CacheDirectory
  2232. were the same, the default setting (0) for
  2233. CacheDirectoryGroupReadable would override the setting for
  2234. DataDirectoryGroupReadable. Fixes bug 26913; bugfix
  2235. on 0.3.3.1-alpha.
  2236. o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha):
  2237. - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
  2238. bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
  2239. o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
  2240. - Don't warn so loudly when Tor is unable to decode an onion
  2241. descriptor. This can now happen as a normal use case if a client
  2242. gets a descriptor with client authorization but the client is not
  2243. authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
  2244. o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc):
  2245. - When deleting an ephemeral onion service (DEL_ONION), do not close
  2246. any rendezvous circuits in order to let the existing client
  2247. connections finish by themselves or closed by the application. The
  2248. HS v2 is doing that already so now we have the same behavior for
  2249. all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
  2250. o Minor bugfixes (relay statistics, backport from 0.3.5.7):
  2251. - Update relay descriptor on bandwidth changes only when the uptime
  2252. is smaller than 24h, in order to reduce the efficiency of guard
  2253. discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
  2254. o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc):
  2255. - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
  2256. bugfix on 0.3.0.1-alpha.
  2257. Changes in version 0.3.5.7 - 2019-01-07
  2258. Tor 0.3.5.7 is the first stable release in its series; it includes
  2259. compilation and portability fixes, and a fix for a severe problem
  2260. affecting directory caches.
  2261. The Tor 0.3.5 series includes several new features and performance
  2262. improvements, including client authorization for v3 onion services,
  2263. cleanups to bootstrap reporting, support for improved bandwidth-
  2264. measurement tools, experimental support for NSS in place of OpenSSL,
  2265. and much more. It also begins a full reorganization of Tor's code
  2266. layout, for improved modularity and maintainability in the future.
  2267. Finally, there is the usual set of performance improvements and
  2268. bugfixes that we try to do in every release series.
  2269. There are a couple of changes in the 0.3.5 that may affect
  2270. compatibility. First, the default version for newly created onion
  2271. services is now v3. Use the HiddenServiceVersion option if you want to
  2272. override this. Second, some log messages related to bootstrapping have
  2273. changed; if you use stem, you may need to update to the latest version
  2274. so it will recognize them.
  2275. We have designated 0.3.5 as a "long-term support" (LTS) series: we
  2276. will continue to patch major bugs in typical configurations of 0.3.5
  2277. until at least 1 Feb 2022. (We do not plan to provide long-term
  2278. support for embedding, Rust support, NSS support, running a directory
  2279. authority, or unsupported platforms. For these, you will need to stick
  2280. with the latest stable release.)
  2281. Below are the changes since 0.3.5.6-rc. For a complete list of changes
  2282. since 0.3.4.9, see the ReleaseNotes file.
  2283. o Major bugfixes (relay, directory):
  2284. - Always reactivate linked connections in the main loop so long as
  2285. any linked connection has been active. Previously, connections
  2286. serving directory information wouldn't get reactivated after the
  2287. first chunk of data was sent (usually 32KB), which would prevent
  2288. clients from bootstrapping. Fixes bug 28912; bugfix on
  2289. 0.3.4.1-alpha. Patch by "cypherpunks3".
  2290. o Minor features (compilation):
  2291. - When possible, place our warning flags in a separate file, to
  2292. avoid flooding verbose build logs. Closes ticket 28924.
  2293. o Minor features (geoip):
  2294. - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2
  2295. Country database. Closes ticket 29012.
  2296. o Minor features (OpenSSL bug workaround):
  2297. - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
  2298. key export function from handling long labels. When this bug is
  2299. detected, Tor will disable TLS 1.3. We recommend upgrading to a
  2300. version of OpenSSL without this bug when it becomes available.
  2301. Closes ticket 28973.
  2302. o Minor features (performance):
  2303. - Remove about 96% of the work from the function that we run at
  2304. startup to test our curve25519_basepoint implementation. Since
  2305. this function has yet to find an actual failure, we now only run
  2306. it for 8 iterations instead of 200. Based on our profile
  2307. information, this change should save around 8% of our startup time
  2308. on typical desktops, and may have a similar effect on other
  2309. platforms. Closes ticket 28838.
  2310. - Stop re-validating our hardcoded Diffie-Hellman parameters on
  2311. every startup. Doing this wasted time and cycles, especially on
  2312. low-powered devices. Closes ticket 28851.
  2313. o Minor bugfixes (compilation):
  2314. - Fix compilation for Android by adding a missing header to
  2315. freespace.c. Fixes bug 28974; bugfix on 0.3.5.1-alpha.
  2316. o Minor bugfixes (correctness):
  2317. - Fix an unreached code path where we checked the value of
  2318. "hostname" inside send_resolved_hostname_cell(). Previously, we
  2319. used it before checking it; now we check it first. Fixes bug
  2320. 28879; bugfix on 0.1.2.7-alpha.
  2321. o Minor bugfixes (testing):
  2322. - Make sure that test_rebind.py actually obeys its timeout, even
  2323. when it receives a large number of log messages. Fixes bug 28883;
  2324. bugfix on 0.3.5.4-alpha.
  2325. - Stop running stem's unit tests as part of "make test-stem", but
  2326. continue to run stem's unit and online tests during "make test-
  2327. stem-full". Fixes bug 28568; bugfix on 0.2.6.3-alpha.
  2328. o Minor bugfixes (windows services):
  2329. - Make Tor start correctly as an NT service again: previously it was
  2330. broken by refactoring. Fixes bug 28612; bugfix on 0.3.5.3-alpha.
  2331. o Code simplification and refactoring:
  2332. - When parsing a port configuration, make it more obvious to static
  2333. analyzer tools that we always initialize the address. Closes
  2334. ticket 28881.
  2335. Changes in version 0.3.5.6-rc - 2018-12-18
  2336. Tor 0.3.5.6-rc fixes numerous small bugs in earlier versions of Tor.
  2337. It is the first release candidate in the 0.3.5.x series; if no further
  2338. huge bugs are found, our next release may be the stable 0.3.5.x.
  2339. o Minor features (continuous integration, Windows):
  2340. - Always show the configure and test logs, and upload them as build
  2341. artifacts, when building for Windows using Appveyor CI.
  2342. Implements 28459.
  2343. o Minor features (fallback directory list):
  2344. - Replace the 150 fallbacks originally introduced in Tor
  2345. 0.3.3.1-alpha in January 2018 (of which ~115 were still
  2346. functional), with a list of 157 fallbacks (92 new, 65 existing, 85
  2347. removed) generated in December 2018. Closes ticket 24803.
  2348. o Minor features (geoip):
  2349. - Update geoip and geoip6 to the December 5 2018 Maxmind GeoLite2
  2350. Country database. Closes ticket 28744.
  2351. o Minor bugfixes (compilation):
  2352. - Add missing dependency on libgdi32.dll for tor-print-ed-signing-
  2353. cert.exe on Windows. Fixes bug 28485; bugfix on 0.3.5.1-alpha.
  2354. o Minor bugfixes (continuous integration, Windows):
  2355. - Explicitly specify the path to the OpenSSL library and do not
  2356. download OpenSSL from Pacman, but instead use the library that is
  2357. already provided by AppVeyor. Fixes bug 28574; bugfix on master.
  2358. o Minor bugfixes (onion service v3):
  2359. - When deleting an ephemeral onion service (DEL_ONION), do not close
  2360. any rendezvous circuits in order to let the existing client
  2361. connections finish by themselves or closed by the application. The
  2362. HS v2 is doing that already so now we have the same behavior for
  2363. all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
  2364. o Minor bugfixes (restart-in-process, boostrap):
  2365. - Add missing resets of bootstrap tracking state when shutting down
  2366. (regression caused by ticket 27169). Fixes bug 28524; bugfix
  2367. on 0.3.5.1-alpha.
  2368. o Minor bugfixes (testing):
  2369. - Use a separate DataDirectory for the test_rebind script.
  2370. Previously, this script would run using the default DataDirectory,
  2371. and sometimes fail. Fixes bug 28562; bugfix on 0.3.5.1-alpha.
  2372. Patch from Taylor R Campbell.
  2373. - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
  2374. bugfix on 0.3.0.1-alpha.
  2375. o Minor bugfixes (Windows):
  2376. - Correctly identify Windows 8.1, Windows 10, and Windows Server
  2377. 2008 and later from their NT versions. Fixes bug 28096; bugfix on
  2378. 0.2.2.34; reported by Keifer Bly.
  2379. - On recent Windows versions, the GetVersionEx() function may report
  2380. an earlier Windows version than the running OS. To avoid user
  2381. confusion, add "[or later]" to Tor's version string on affected
  2382. versions of Windows. Fixes bug 28096; bugfix on 0.2.2.34; reported
  2383. by Keifer Bly.
  2384. - Remove Windows versions that were never supported by the
  2385. GetVersionEx() function. Stop duplicating the latest Windows
  2386. version in get_uname(). Fixes bug 28096; bugfix on 0.2.2.34;
  2387. reported by Keifer Bly.
  2388. o Testing:
  2389. - Increase logging and tag all log entries with timestamps in
  2390. test_rebind.py. Provides diagnostics for issue 28229.
  2391. o Code simplification and refactoring (shared random, dirauth):
  2392. - Change many tor_assert() to use BUG() instead. The idea is to not
  2393. crash a dirauth but rather scream loudly with a stacktrace and let
  2394. it continue run. The shared random subsystem is very resilient and
  2395. if anything wrong happens with it, at worst a non coherent value
  2396. will be put in the vote and discarded by the other authorities.
  2397. Closes ticket 19566.
  2398. o Documentation (onion services):
  2399. - Document in the man page that changing ClientOnionAuthDir value or
  2400. adding a new file in the directory will not work at runtime upon
  2401. sending a HUP if Sandbox 1. Closes ticket 28128.
  2402. - Note in the man page that the only real way to fully revoke an
  2403. onion service v3 client authorization is by restarting the tor
  2404. process. Closes ticket 28275.
  2405. Changes in version 0.3.5.5-alpha - 2018-11-16
  2406. Tor 0.3.5.5-alpha includes numerous bugfixes on earlier releases,
  2407. including several that we hope to backport to older release series in
  2408. the future.
  2409. o Major bugfixes (OpenSSL, portability):
  2410. - Fix our usage of named groups when running as a TLS 1.3 client in
  2411. OpenSSL 1.1.1. Previously, we only initialized EC groups when
  2412. running as a relay, which caused clients to fail to negotiate TLS
  2413. 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
  2414. support was added).
  2415. o Minor features (geoip):
  2416. - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2
  2417. Country database. Closes ticket 28395.
  2418. o Minor bugfixes (compilation):
  2419. - Initialize a variable unconditionally in aes_new_cipher(), since
  2420. some compilers cannot tell that we always initialize it before
  2421. use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
  2422. o Minor bugfixes (connection, relay):
  2423. - Avoid a logging a BUG() stacktrace when closing connection held
  2424. open because the write side is rate limited but not the read side.
  2425. Now, the connection read side is simply shut down until Tor is
  2426. able to flush the connection and close it. Fixes bug 27750; bugfix
  2427. on 0.3.4.1-alpha.
  2428. o Minor bugfixes (continuous integration, Windows):
  2429. - Manually configure the zstd compiler options, when building using
  2430. mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does
  2431. not come with a pkg-config file. Fixes bug 28454; bugfix
  2432. on 0.3.4.1-alpha.
  2433. - Stop using an external OpenSSL install, and stop installing MSYS2
  2434. packages, when building using mingw on Appveyor Windows CI. Fixes
  2435. bug 28399; bugfix on 0.3.4.1-alpha.
  2436. o Minor bugfixes (documentation):
  2437. - Make Doxygen work again after the code movement in the 0.3.5
  2438. source tree. Fixes bug 28435; bugfix on 0.3.5.1-alpha.
  2439. o Minor bugfixes (Linux seccomp2 sandbox):
  2440. - Permit the "shutdown()" system call, which is apparently used by
  2441. OpenSSL under some circumstances. Fixes bug 28183; bugfix
  2442. on 0.2.5.1-alpha.
  2443. o Minor bugfixes (logging):
  2444. - Stop talking about the Named flag in log messages. Clients have
  2445. ignored the Named flag since 0.3.2. Fixes bug 28441; bugfix
  2446. on 0.3.2.1-alpha.
  2447. o Minor bugfixes (memory leaks):
  2448. - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
  2449. bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
  2450. o Minor bugfixes (onion services):
  2451. - On an intro point for a version 3 onion service, stop closing
  2452. introduction circuits on an NACK. This lets the client decide
  2453. whether to reuse the circuit or discard it. Previously, we closed
  2454. intro circuits when sending NACKs. Fixes bug 27841; bugfix on
  2455. 0.3.2.1-alpha. Patch by Neel Chaunan.
  2456. - When replacing a descriptor in the client cache, make sure to
  2457. close all client introduction circuits for the old descriptor, so
  2458. we don't end up with unusable leftover circuits. Fixes bug 27471;
  2459. bugfix on 0.3.2.1-alpha.
  2460. Changes in version 0.3.5.4-alpha - 2018-11-08
  2461. Tor 0.3.5.4-alpha includes numerous bugfixes on earlier versions and
  2462. improves our continuous integration support. It continues our attempts
  2463. to stabilize this alpha branch and build it into a foundation for an
  2464. acceptable long-term-support release.
  2465. o Major bugfixes (compilation, rust):
  2466. - Rust tests can now build and run successfully with the
  2467. --enable-fragile-hardening option enabled. Doing this currently
  2468. requires the rust beta channel; it will be possible with stable
  2469. rust once Rust version 1.31 is released. Patch from Alex Crichton.
  2470. Fixes bugs 27272, 27273, and 27274. Bugfix on 0.3.1.1-alpha.
  2471. o Major bugfixes (embedding, main loop):
  2472. - When DisableNetwork becomes set, actually disable periodic events
  2473. that are already enabled. (Previously, we would refrain from
  2474. enabling new ones, but we would leave the old ones turned on.)
  2475. Fixes bug 28348; bugfix on 0.3.4.1-alpha.
  2476. o Minor features (continuous integration):
  2477. - Add a Travis CI build for --enable-nss on Linux gcc. Closes
  2478. ticket 27751.
  2479. - Add new CI job to Travis configuration to run stem-based
  2480. integration tests. Closes ticket 27913.
  2481. o Minor features (Windows, continuous integration):
  2482. - Build tor on Windows Server 2012 R2 and Windows Server 2016 using
  2483. Appveyor's CI. Closes ticket 28318.
  2484. o Minor bugfixes (C correctness, also in 0.3.4.9):
  2485. - Avoid undefined behavior in an end-of-string check when parsing
  2486. the BEGIN line in a directory object. Fixes bug 28202; bugfix
  2487. on 0.2.0.3-alpha.
  2488. o Minor bugfixes (compilation):
  2489. - Fix a pair of missing headers on OpenBSD. Fixes bug 28303; bugfix
  2490. on 0.3.5.1-alpha. Patch from Kris Katterjohn.
  2491. o Minor bugfixes (compilation, OpenSolaris):
  2492. - Fix compilation on OpenSolaris and its descendants by adding a
  2493. missing include to compat_pthreads.c. Fixes bug 27963; bugfix
  2494. on 0.3.5.1-alpha.
  2495. o Minor bugfixes (configuration):
  2496. - Refuse to start with relative file paths and RunAsDaemon set
  2497. (regression from the fix for bug 22731). Fixes bug 28298; bugfix
  2498. on 0.3.3.1-alpha.
  2499. o Minor bugfixes (directory authority, also in 0.3.4.9):
  2500. - Log additional info when we get a relay that shares an ed25519 ID
  2501. with a different relay, instead of a BUG() warning with a
  2502. backtrace. Fixes bug 27800; bugfix on 0.3.2.1-alpha.
  2503. o Minor bugfixes (onion service v3):
  2504. - Build the service descriptor's signing key certificate before
  2505. uploading, so we always have a fresh one: leaving no chances for
  2506. it to expire service side. Fixes bug 27838; bugfix
  2507. on 0.3.2.1-alpha.
  2508. o Minor bugfixes (onion service v3, client authorization):
  2509. - Fix an assert() when adding a client authorization for the first
  2510. time and then sending a HUP signal to the service. Before that,
  2511. Tor would stop abruptly. Fixes bug 27995; bugfix on 0.3.5.1-alpha.
  2512. o Minor bugfixes (onion services):
  2513. - Unless we have explicitly set HiddenServiceVersion, detect the
  2514. onion service version and then look for invalid options.
  2515. Previously, we did the reverse, but that broke existing configs
  2516. which were pointed to a v2 service and had options like
  2517. HiddenServiceAuthorizeClient set. Fixes bug 28127; bugfix on
  2518. 0.3.5.1-alpha. Patch by Neel Chauhan.
  2519. o Minor bugfixes (portability):
  2520. - Make the OPE code (which is used for v3 onion services) run
  2521. correctly on big-endian platforms. Fixes bug 28115; bugfix
  2522. on 0.3.5.1-alpha.
  2523. o Minor bugfixes (protover, rust):
  2524. - Reject extra commas in version strings. Fixes bug 27197; bugfix
  2525. on 0.3.3.3-alpha.
  2526. o Minor bugfixes (relay shutdown, systemd):
  2527. - Notify systemd of ShutdownWaitLength so it can be set to longer
  2528. than systemd's TimeoutStopSec. In Tor's systemd service file, set
  2529. TimeoutSec to 60 seconds to allow Tor some time to shut down.
  2530. Fixes bug 28113; bugfix on 0.2.6.2-alpha.
  2531. o Minor bugfixes (rust, also in 0.3.4.9):
  2532. - Fix a potential null dereference in protover_all_supported(). Add
  2533. a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
  2534. - Return a string that can be safely freed by C code, not one
  2535. created by the rust allocator, in protover_all_supported(). Fixes
  2536. bug 27740; bugfix on 0.3.3.1-alpha.
  2537. o Minor bugfixes (rust, directory authority, also in 0.3.4.9):
  2538. - Fix an API mismatch in the rust implementation of
  2539. protover_compute_vote(). This bug could have caused crashes on any
  2540. directory authorities running Tor with Rust (which we do not yet
  2541. recommend). Fixes bug 27741; bugfix on 0.3.3.6.
  2542. o Minor bugfixes (testing):
  2543. - Avoid hangs and race conditions in test_rebind.py. Fixes bug
  2544. 27968; bugfix on 0.3.5.1-alpha.
  2545. o Minor bugfixes (testing, also in 0.3.4.9):
  2546. - Treat backtrace test failures as expected on BSD-derived systems
  2547. (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
  2548. (FreeBSD failures have been treated as expected since 18204 in
  2549. 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
  2550. o Documentation (onion service manpage):
  2551. - Improve HSv3 client authorization by making some options more
  2552. explicit and detailed. Closes ticket 28026. Patch by Mike Tigas.
  2553. Changes in version 0.3.4.9 - 2018-11-02
  2554. Tor 0.3.4.9 is the second stable release in its series; it backports
  2555. numerous fixes, including a fix for a bandwidth management bug that
  2556. was causing memory exhaustion on relays. Anyone running an earlier
  2557. version of Tor 0.3.4.9 should upgrade.
  2558. o Major bugfixes (compilation, backport from 0.3.5.3-alpha):
  2559. - Fix compilation on ARM (and other less-used CPUs) when compiling
  2560. with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
  2561. o Major bugfixes (mainloop, bootstrap, backport from 0.3.5.3-alpha):
  2562. - Make sure Tor bootstraps and works properly if only the
  2563. ControlPort is set. Prior to this fix, Tor would only bootstrap
  2564. when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
  2565. port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
  2566. o Major bugfixes (relay, backport from 0.3.5.3-alpha):
  2567. - When our write bandwidth limit is exhausted, stop writing on the
  2568. connection. Previously, we had a typo in the code that would make
  2569. us stop reading instead, leading to relay connections being stuck
  2570. indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
  2571. on 0.3.4.1-alpha.
  2572. o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
  2573. - Fix a use-after-free error that could be caused by passing Tor an
  2574. impossible set of options that would fail during options_act().
  2575. Fixes bug 27708; bugfix on 0.3.3.1-alpha.
  2576. o Minor features (continuous integration, backport from 0.3.5.1-alpha):
  2577. - Don't do a distcheck with --disable-module-dirauth in Travis.
  2578. Implements ticket 27252.
  2579. - Only run one online rust build in Travis, to reduce network
  2580. errors. Skip offline rust builds on Travis for Linux gcc, because
  2581. they're redundant. Implements ticket 27252.
  2582. - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
  2583. duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
  2584. Linux with default settings, because all the non-default builds
  2585. use gcc on Linux. Implements ticket 27252.
  2586. o Minor features (continuous integration, backport from 0.3.5.3-alpha):
  2587. - Use the Travis Homebrew addon to install packages on macOS during
  2588. Travis CI. The package list is the same, but the Homebrew addon
  2589. does not do a `brew update` by default. Implements ticket 27738.
  2590. o Minor features (geoip):
  2591. - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
  2592. Country database. Closes ticket 27991.
  2593. o Minor bugfixes (32-bit OSX and iOS, timing, backport from 0.3.5.2-alpha):
  2594. - Fix an integer overflow bug in our optimized 32-bit millisecond-
  2595. difference algorithm for 32-bit Apple platforms. Previously, it
  2596. would overflow when calculating the difference between two times
  2597. more than 47 days apart. Fixes part of bug 27139; bugfix
  2598. on 0.3.4.1-alpha.
  2599. - Improve the precision of our 32-bit millisecond difference
  2600. algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
  2601. bugfix on 0.3.4.1-alpha.
  2602. - Relax the tolerance on the mainloop/update_time_jumps test when
  2603. running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
  2604. on 0.3.4.1-alpha.
  2605. o Minor bugfixes (C correctness, to appear in 0.3.5.4-alpha):
  2606. - Avoid undefined behavior in an end-of-string check when parsing
  2607. the BEGIN line in a directory object. Fixes bug 28202; bugfix
  2608. on 0.2.0.3-alpha.
  2609. o Minor bugfixes (CI, appveyor, to appear in 0.3.5.4-alpha):
  2610. - Only install the necessary mingw packages during our appveyor
  2611. builds. This change makes the build a little faster, and prevents
  2612. a conflict with a preinstalled mingw openssl that appveyor now
  2613. ships. Fixes bugs 27943 and 27765; bugfix on 0.3.4.2-alpha.
  2614. o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
  2615. - Rewrite our assertion macros so that they no longer suppress the
  2616. compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
  2617. o Minor bugfixes (continuous integration, backport from 0.3.5.1-alpha):
  2618. - Stop reinstalling identical packages in our Windows CI. Fixes bug
  2619. 27464; bugfix on 0.3.4.1-alpha.
  2620. o Minor bugfixes (directory authority, to appear in 0.3.5.4-alpha):
  2621. - Log additional info when we get a relay that shares an ed25519 ID
  2622. with a different relay, instead making a BUG() warning. Fixes bug
  2623. 27800; bugfix on 0.3.2.1-alpha.
  2624. o Minor bugfixes (directory connection shutdown, backport from 0.3.5.1-alpha):
  2625. - Avoid a double-close when shutting down a stalled directory
  2626. connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
  2627. o Minor bugfixes (HTTP tunnel, backport from 0.3.5.1-alpha):
  2628. - Fix a bug warning when closing an HTTP tunnel connection due to an
  2629. HTTP request we couldn't handle. Fixes bug 26470; bugfix
  2630. on 0.3.2.1-alpha.
  2631. o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
  2632. - Ensure circuitmux queues are empty before scheduling or sending
  2633. padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
  2634. o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
  2635. - When the onion service directory can't be created or has the wrong
  2636. permissions, do not log a stack trace. Fixes bug 27335; bugfix
  2637. on 0.3.2.1-alpha.
  2638. o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
  2639. - Close all SOCKS request (for the same .onion) if the newly fetched
  2640. descriptor is unusable. Before that, we would close only the first
  2641. one leaving the other hanging and let to time out by themselves.
  2642. Fixes bug 27410; bugfix on 0.3.2.1-alpha.
  2643. o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
  2644. - When selecting a v3 rendezvous point, don't only look at the
  2645. protover, but also check whether the curve25519 onion key is
  2646. present. This way we avoid picking a relay that supports the v3
  2647. rendezvous but for which we don't have the microdescriptor. Fixes
  2648. bug 27797; bugfix on 0.3.2.1-alpha.
  2649. o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
  2650. - Reject protocol names containing bytes other than alphanumeric
  2651. characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
  2652. on 0.2.9.4-alpha.
  2653. o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
  2654. - Compute protover votes correctly in the rust version of the
  2655. protover code. Previously, the protover rewrite in 24031 allowed
  2656. repeated votes from the same voter for the same protocol version
  2657. to be counted multiple times in protover_compute_vote(). Fixes bug
  2658. 27649; bugfix on 0.3.3.5-rc.
  2659. - Reject protover names that contain invalid characters. Fixes bug
  2660. 27687; bugfix on 0.3.3.1-alpha.
  2661. o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
  2662. - protover_all_supported() would attempt to allocate up to 16GB on
  2663. some inputs, leading to a potential memory DoS. Fixes bug 27206;
  2664. bugfix on 0.3.3.5-rc.
  2665. o Minor bugfixes (rust, directory authority, to appear in 0.3.5.4-alpha):
  2666. - Fix an API mismatch in the rust implementation of
  2667. protover_compute_vote(). This bug could have caused crashes on any
  2668. directory authorities running Tor with Rust (which we do not yet
  2669. recommend). Fixes bug 27741; bugfix on 0.3.3.6.
  2670. o Minor bugfixes (rust, to appear in 0.3.5.4-alpha):
  2671. - Fix a potential null dereference in protover_all_supported(). Add
  2672. a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
  2673. - Return a string that can be safely freed by C code, not one
  2674. created by the rust allocator, in protover_all_supported(). Fixes
  2675. bug 27740; bugfix on 0.3.3.1-alpha.
  2676. o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
  2677. - If a unit test running in a subprocess exits abnormally or with a
  2678. nonzero status code, treat the test as having failed, even if the
  2679. test reported success. Without this fix, memory leaks don't cause
  2680. the tests to fail, even with LeakSanitizer. Fixes bug 27658;
  2681. bugfix on 0.2.2.4-alpha.
  2682. o Minor bugfixes (testing, backport from 0.3.5.3-alpha):
  2683. - Make the hs_service tests use the same time source when creating
  2684. the introduction point and when testing it. Now tests work better
  2685. on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
  2686. on 0.3.2.1-alpha.
  2687. o Minor bugfixes (testing, to appear in 0.3.5.4-alpha):
  2688. - Treat backtrace test failures as expected on BSD-derived systems
  2689. (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
  2690. (FreeBSD failures have been treated as expected since 18204 in
  2691. 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
  2692. Changes in version 0.3.5.3-alpha - 2018-10-17
  2693. Tor 0.3.5.3-alpha fixes several bugs, mostly from previous 0.3.5.x
  2694. versions. One important fix for relays addresses a problem with rate-
  2695. limiting code from back in 0.3.4.x: If the fix works out, we'll be
  2696. backporting it soon. This release is still an alpha, but we hope it's
  2697. getting closer and closer to stability.
  2698. o Major features (onion services):
  2699. - Version 3 onion services can now use the per-service
  2700. HiddenServiceExportCircuitID option to differentiate client
  2701. circuits. It communicates with the service by using the HAProxy
  2702. protocol to assign virtual IP addresses to inbound client
  2703. circuits. Closes ticket 4700. Patch by Mahrud Sayrafi.
  2704. o Major bugfixes (compilation):
  2705. - Fix compilation on ARM (and other less-used CPUs) when compiling
  2706. with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
  2707. o Major bugfixes (initialization, crash):
  2708. - Fix an assertion crash that would stop Tor from starting up if it
  2709. tried to activate a periodic event too early. Fixes bug 27861;
  2710. bugfix on 0.3.5.1-alpha.
  2711. o Major bugfixes (mainloop, bootstrap):
  2712. - Make sure Tor bootstraps and works properly if only the
  2713. ControlPort is set. Prior to this fix, Tor would only bootstrap
  2714. when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
  2715. port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
  2716. o Major bugfixes (relay):
  2717. - When our write bandwidth limit is exhausted, stop writing on the
  2718. connection. Previously, we had a typo in the code that would make
  2719. us stop reading instead, leading to relay connections being stuck
  2720. indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
  2721. on 0.3.4.1-alpha.
  2722. o Minor features (continuous integration):
  2723. - Use the Travis Homebrew addon to install packages on macOS during
  2724. Travis CI. The package list is the same, but the Homebrew addon
  2725. does not do a `brew update` by default. Implements ticket 27738.
  2726. - Report what program produced the mysterious core file that we
  2727. occasionally see on Travis CI during make distcheck. Closes
  2728. ticket 28024.
  2729. o Minor features (geoip):
  2730. - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
  2731. Country database. Closes ticket 27991.
  2732. o Minor bugfixes (code safety):
  2733. - Rewrite our assertion macros so that they no longer suppress the
  2734. compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
  2735. on 0.0.6.
  2736. o Minor bugfixes (compilation):
  2737. - Compile the ed25519-donna code with a correct declaration of
  2738. crypto_strongest_rand(). Previously, we built it with one type,
  2739. but linked it against another in the unit tests, which caused
  2740. compilation failures with LTO enabled. This could have caused
  2741. other undefined behavior in the tests. Fixes bug 27728; bugfix
  2742. on 0.3.5.1-alpha.
  2743. o Minor bugfixes (compilation, netbsd):
  2744. - Add a missing include back into procmon.c. Fixes bug 27990; bugfix
  2745. on 0.3.5.1-alpha.
  2746. o Minor bugfixes (continuous integration, appveyor):
  2747. - Install only the necessary mingw packages during our appveyor
  2748. builds. This change makes the build a little faster, and prevents
  2749. a conflict with a preinstalled mingw openssl that appveyor now
  2750. ships. Fixes bugs 27765 and 27943; bugfix on 0.3.4.2-alpha.
  2751. o Minor bugfixes (directory permissions):
  2752. - When a user requests a group-readable DataDirectory, give it to
  2753. them. Previously, when the DataDirectory and the CacheDirectory
  2754. were the same, the default setting (0) for
  2755. CacheDirectoryGroupReadable would override the setting for
  2756. DataDirectoryGroupReadable. Fixes bug 26913; bugfix
  2757. on 0.3.3.1-alpha.
  2758. o Minor bugfixes (memory leaks):
  2759. - Fix a small memory leak when calling Tor with --dump-config. Fixes
  2760. bug 27893; bugfix on 0.3.2.1-alpha.
  2761. o Minor bugfixes (networking):
  2762. - In retry_listeners_ports(), make sure that we're removing a member
  2763. of old_conns smartlist at most once. Fixes bug 27808; bugfix
  2764. on 0.3.5.1-alpha.
  2765. - Refrain from attempting socket rebinding when old and new
  2766. listeners are in different address families. Fixes bug 27928;
  2767. bugfix on 0.3.5.1-alpha.
  2768. o Minor bugfixes (onion service v3):
  2769. - Stop dumping a stack trace when trying to connect to an intro
  2770. point without having a descriptor for it. Fixes bug 27774; bugfix
  2771. on 0.3.2.1-alpha.
  2772. - Don't warn so loudly when Tor is unable to decode an onion
  2773. descriptor. This can now happen as a normal use case if a client
  2774. gets a descriptor with client authorization but the client is not
  2775. authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
  2776. - When selecting a v3 rendezvous point, don't only look at the
  2777. protover, but also check whether the curve25519 onion key is
  2778. present. This way we avoid picking a relay that supports the v3
  2779. rendezvous but for which we don't have the microdescriptor. Fixes
  2780. bug 27797; bugfix on 0.3.2.1-alpha.
  2781. o Minor bugfixes (protover):
  2782. - Reject protocol names containing bytes other than alphanumeric
  2783. characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
  2784. on 0.2.9.4-alpha.
  2785. o Minor bugfixes (testing):
  2786. - Make the hs_service tests use the same time source when creating
  2787. the introduction point and when testing it. Now tests work better
  2788. on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
  2789. on 0.3.2.1-alpha.
  2790. - In test_rebind.py, check if the Python version is in the supported
  2791. range. Fixes bug 27675; bugfix on 0.3.5.1-alpha.
  2792. o Code simplification and refactoring:
  2793. - Divide more large Tor source files -- especially ones that span
  2794. multiple areas of functionality -- into smaller parts, including
  2795. onion.c and main.c. Closes ticket 26747.
  2796. - Divide the "routerparse.c" module into separate modules for each
  2797. group of parsed objects. Closes ticket 27924.
  2798. - Move protover_rust.c to the same place protover.c was moved to.
  2799. Closes ticket 27814.
  2800. - Split directory.c into separate pieces for client, server, and
  2801. common functionality. Closes ticket 26744.
  2802. - Split the non-statistics-related parts from the rephist.c and
  2803. geoip.c modules. Closes ticket 27892.
  2804. - Split the router.c file into relay-only and shared components, to
  2805. help with future modularization. Closes ticket 27864.
  2806. o Documentation:
  2807. - In the tor-resolve(1) manpage, fix the reference to socks-
  2808. extensions.txt by adding a web URL. Resolves ticket 27853.
  2809. - Mention that we require Python to be 2.7 or newer for some
  2810. integration tests that we ship with Tor. Resolves ticket 27677.
  2811. Changes in version 0.3.5.2-alpha - 2018-09-21
  2812. Tor 0.3.5.2-alpha fixes several bugs in 0.3.5.1-alpha, including one
  2813. that made Tor think it had run out of sockets. Anybody running a relay
  2814. or an onion service on 0.3.5.1-alpha should upgrade.
  2815. o Major bugfixes (relay bandwidth statistics):
  2816. - When we close relayed circuits, report the data in the circuit
  2817. queues as being written in our relay bandwidth stats. This
  2818. mitigates guard discovery and other attacks that close circuits
  2819. for the explicit purpose of noticing this discrepancy in
  2820. statistics. Fixes bug 23512; bugfix on 0.0.8pre3.
  2821. o Major bugfixes (socket accounting):
  2822. - In our socket accounting code, count a socket as closed even when
  2823. it is closed indirectly by the TLS layer. Previously, we would
  2824. count these sockets as still in use, and incorrectly believe that
  2825. we had run out of sockets. Fixes bug 27795; bugfix
  2826. on 0.3.5.1-alpha.
  2827. o Minor bugfixes (32-bit OSX and iOS, timing):
  2828. - Fix an integer overflow bug in our optimized 32-bit millisecond-
  2829. difference algorithm for 32-bit Apple platforms. Previously, it
  2830. would overflow when calculating the difference between two times
  2831. more than 47 days apart. Fixes part of bug 27139; bugfix
  2832. on 0.3.4.1-alpha.
  2833. - Improve the precision of our 32-bit millisecond difference
  2834. algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
  2835. bugfix on 0.3.4.1-alpha.
  2836. - Relax the tolerance on the mainloop/update_time_jumps test when
  2837. running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
  2838. on 0.3.4.1-alpha.
  2839. o Minor bugfixes (onion service v3):
  2840. - Close all SOCKS request (for the same .onion) if the newly fetched
  2841. descriptor is unusable. Before that, we would close only the first
  2842. one leaving the other hanging and let to time out by themselves.
  2843. Fixes bug 27410; bugfix on 0.3.2.1-alpha.
  2844. o Minor bugfixes (memory leak):
  2845. - Fix an unlikely memory leak when trying to read a private key from
  2846. a ridiculously large file. Fixes bug 27764; bugfix on
  2847. 0.3.5.1-alpha. This is CID 1439488.
  2848. o Minor bugfixes (NSS):
  2849. - Correctly detect failure to open a dummy TCP socket when stealing
  2850. ownership of an fd from the NSS layer. Fixes bug 27782; bugfix
  2851. on 0.3.5.1-alpha.
  2852. o Minor bugfixes (rust):
  2853. - protover_all_supported() would attempt to allocate up to 16GB on
  2854. some inputs, leading to a potential memory DoS. Fixes bug 27206;
  2855. bugfix on 0.3.3.5-rc.
  2856. o Minor bugfixes (testing):
  2857. - Revise the "conditionvar_timeout" test so that it succeeds even on
  2858. heavily loaded systems where the test threads are not scheduled
  2859. within 200 msec. Fixes bug 27073; bugfix on 0.2.6.3-alpha.
  2860. o Code simplification and refactoring:
  2861. - Divide the routerlist.c and dirserv.c modules into smaller parts.
  2862. Closes ticket 27799.
  2863. Changes in version 0.3.5.1-alpha - 2018-09-18
  2864. Tor 0.3.5.1-alpha is the first release of the 0.3.5.x series. It adds
  2865. client authorization for modern (v3) onion services, improves
  2866. bootstrap reporting, begins reorganizing Tor's codebase, adds optional
  2867. support for NSS in place of OpenSSL, and much more.
  2868. o Major features (onion services, UI change):
  2869. - For a newly created onion service, the default version is now 3.
  2870. Tor still supports existing version 2 services, but the operator
  2871. now needs to set "HiddenServiceVersion 2" in order to create a new
  2872. version 2 service. For existing services, Tor now learns the
  2873. version by reading the key file. Closes ticket 27215.
  2874. o Major features (relay, UI change):
  2875. - Relays no longer run as exits by default. If the "ExitRelay"
  2876. option is auto (or unset), and no exit policy is specified with
  2877. ExitPolicy or ReducedExitPolicy, we now treat ExitRelay as 0.
  2878. Previously in this case, we allowed exit traffic and logged a
  2879. warning message. Closes ticket 21530. Patch by Neel Chauhan.
  2880. - Tor now validates that the ContactInfo config option is valid UTF-
  2881. 8 when parsing torrc. Closes ticket 27428.
  2882. o Major features (bootstrap):
  2883. - Don't report directory progress until after a connection to a
  2884. relay or bridge has succeeded. Previously, we'd report 80%
  2885. progress based on cached directory information when we couldn't
  2886. even connect to the network. Closes ticket 27169.
  2887. o Major features (new code layout):
  2888. - Nearly all of Tor's source code has been moved around into more
  2889. logical places. The "common" directory is now divided into a set
  2890. of libraries in "lib", and files in the "or" directory have been
  2891. split into "core" (logic absolutely needed for onion routing),
  2892. "feature" (independent modules in Tor), and "app" (to configure
  2893. and invoke the rest of Tor). See doc/HACKING/CodeStructure.md for
  2894. more information. Closes ticket 26481.
  2895. This refactoring is not complete: although the libraries have been
  2896. refactored to be acyclic, the main body of Tor is still too
  2897. interconnected. We will attempt to improve this in the future.
  2898. o Major features (onion services v3):
  2899. - Implement onion service client authorization at the descriptor
  2900. level: only authorized clients can decrypt a service's descriptor
  2901. to find out how to contact it. A new torrc option was added to
  2902. control this client side: ClientOnionAuthDir <path>. On the
  2903. service side, if the "authorized_clients/" directory exists in the
  2904. onion service directory path, client configurations are read from
  2905. the files within. See the manpage for more details. Closes ticket
  2906. 27547. Patch done by Suphanat Chunhapanya (haxxpop).
  2907. - Improve revision counter generation in next-gen onion services.
  2908. Onion services can now scale by hosting multiple instances on
  2909. different hosts without synchronization between them, which was
  2910. previously impossible because descriptors would get rejected by
  2911. HSDirs. Addresses ticket 25552.
  2912. o Major features (portability, cryptography, experimental, TLS):
  2913. - Tor now has the option to compile with the NSS library instead of
  2914. OpenSSL. This feature is experimental, and we expect that bugs may
  2915. remain. It is mainly intended for environments where Tor's
  2916. performance is not CPU-bound, and where NSS is already known to be
  2917. installed. To try it out, configure Tor with the --enable-nss
  2918. flag. Closes tickets 26631, 26815, and 26816.
  2919. If you are experimenting with this option and using an old cached
  2920. consensus, Tor may fail to start. To solve this, delete your
  2921. "cached-consensus" and "cached-microdesc-consensus" files,
  2922. (if present), and restart Tor.
  2923. o Major bugfixes (directory authority):
  2924. - Actually check that the address we get from DirAuthority
  2925. configuration line is valid IPv4. Explicitly disallow DirAuthority
  2926. address to be a DNS hostname. Fixes bug 26488; bugfix
  2927. on 0.1.2.10-rc.
  2928. o Major bugfixes (restart-in-process):
  2929. - Fix a use-after-free error that could be caused by passing Tor an
  2930. impossible set of options that would fail during options_act().
  2931. Fixes bug 27708; bugfix on 0.3.3.1-alpha.
  2932. o Minor features (admin tools):
  2933. - Add a new --key-expiration option to print the expiration date of
  2934. the signing cert in an ed25519_signing_cert file. Resolves
  2935. issue 19506.
  2936. o Minor features (build):
  2937. - If you pass the "--enable-pic" option to configure, Tor will try
  2938. to tell the compiler to build position-independent code suitable
  2939. to link into a dynamic library. (The default remains -fPIE, for
  2940. code suitable for a relocatable executable.) Closes ticket 23846.
  2941. o Minor features (code correctness, testing):
  2942. - Tor's build process now includes a "check-includes" make target to
  2943. verify that no module of Tor relies on any headers from a higher-
  2944. level module. We hope to use this feature over time to help
  2945. refactor our codebase. Closes ticket 26447.
  2946. o Minor features (code layout):
  2947. - We have a new "lowest-level" error-handling API for use by code
  2948. invoked from within the logging module. With this interface, the
  2949. logging code is no longer at risk of calling into itself if a
  2950. failure occurs while it is trying to log something. Closes
  2951. ticket 26427.
  2952. o Minor features (compilation):
  2953. - Tor's configure script now supports a --with-malloc= option to
  2954. select your malloc implementation. Supported options are
  2955. "tcmalloc", "jemalloc", "openbsd" (deprecated), and "system" (the
  2956. default). Addresses part of ticket 20424. Based on a patch from
  2957. Alex Xu.
  2958. o Minor features (config):
  2959. - The "auto" keyword in torrc is now case-insensitive. Closes
  2960. ticket 26663.
  2961. o Minor features (continuous integration):
  2962. - Don't do a distcheck with --disable-module-dirauth in Travis.
  2963. Implements ticket 27252.
  2964. - Install libcap-dev and libseccomp2-dev so these optional
  2965. dependencies get tested on Travis CI. Closes ticket 26560.
  2966. - Only run one online rust build in Travis, to reduce network
  2967. errors. Skip offline rust builds on Travis for Linux gcc, because
  2968. they're redundant. Implements ticket 27252.
  2969. - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
  2970. duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
  2971. Linux with default settings, because all the non-default builds
  2972. use gcc on Linux. Implements ticket 27252.
  2973. o Minor features (controller):
  2974. - Emit CIRC_BW events as soon as we detect that we processed an
  2975. invalid or otherwise dropped cell on a circuit. This allows
  2976. vanguards and other controllers to react more quickly to dropped
  2977. cells. Closes ticket 27678.
  2978. - For purposes of CIRC_BW-based dropped cell detection, track half-
  2979. closed stream ids, and allow their ENDs, SENDMEs, DATA and path
  2980. bias check cells to arrive without counting it as dropped until
  2981. either the END arrives, or the windows are empty. Closes
  2982. ticket 25573.
  2983. - Implement a 'GETINFO md/all' controller command to enable getting
  2984. all known microdescriptors. Closes ticket 8323.
  2985. - The GETINFO command now support an "uptime" argument, to return
  2986. Tor's uptime in seconds. Closes ticket 25132.
  2987. o Minor features (denial-of-service avoidance):
  2988. - Make our OOM handler aware of the DNS cache so that it doesn't
  2989. fill up the memory. This check is important for our DoS mitigation
  2990. subsystem. Closes ticket 18642. Patch by Neel Chauhan.
  2991. o Minor features (development):
  2992. - Tor's makefile now supports running the "clippy" Rust style tool
  2993. on our Rust code. Closes ticket 22156.
  2994. o Minor features (directory authority):
  2995. - There is no longer an artificial upper limit on the length of
  2996. bandwidth lines. Closes ticket 26223.
  2997. - When a bandwidth file is used to obtain the bandwidth measurements,
  2998. include this bandwidth file headers in the votes. Closes
  2999. ticket 3723.
  3000. - Improved support for networks with only a single authority or a
  3001. single fallback directory. Patch from Gabriel Somlo. Closes
  3002. ticket 25928.
  3003. o Minor features (embedding API):
  3004. - The Tor controller API now supports a function to launch Tor with
  3005. a preconstructed owning controller FD, so that embedding
  3006. applications don't need to manage controller ports and
  3007. authentication. Closes ticket 24204.
  3008. - The Tor controller API now has a function that returns the name
  3009. and version of the backend implementing the API. Closes
  3010. ticket 26947.
  3011. o Minor features (geoip):
  3012. - Update geoip and geoip6 to the September 6 2018 Maxmind GeoLite2
  3013. Country database. Closes ticket 27631.
  3014. o Minor features (memory management):
  3015. - Get Libevent to use the same memory allocator as Tor, by calling
  3016. event_set_mem_functions() during initialization. Resolves
  3017. ticket 8415.
  3018. o Minor features (memory usage):
  3019. - When not using them, store legacy TAP public onion keys in DER-
  3020. encoded format, rather than as expanded public keys. This should
  3021. save several megabytes on typical clients. Closes ticket 27246.
  3022. o Minor features (OpenSSL):
  3023. - When possible, use RFC5869 HKDF implementation from OpenSSL rather
  3024. than our own. Resolves ticket 19979.
  3025. o Minor features (Rust, code quality):
  3026. - Improve rust code quality in the rust protover implementation by
  3027. making it more idiomatic. Includes changing an internal API to
  3028. take &str instead of &String. Closes ticket 26492.
  3029. o Minor features (testing):
  3030. - Add scripts/test/chutney-git-bisect.sh, for bisecting using
  3031. chutney. Implements ticket 27211.
  3032. o Minor features (tor-resolve):
  3033. - The tor-resolve utility can now be used with IPv6 SOCKS proxies.
  3034. Side-effect of the refactoring for ticket 26526.
  3035. o Minor features (UI):
  3036. - Log each included configuration file or directory as we read it,
  3037. to provide more visibility about where Tor is reading from. Patch
  3038. from Unto Sten; closes ticket 27186.
  3039. - Lower log level of "Scheduler type KIST has been enabled" to INFO.
  3040. Closes ticket 26703.
  3041. o Minor bugfixes (bootstrap):
  3042. - Try harder to get descriptors in non-exit test networks, by using
  3043. the mid weight for the third hop when there are no exits. Fixes
  3044. bug 27237; bugfix on 0.2.6.2-alpha.
  3045. o Minor bugfixes (C correctness):
  3046. - Avoid casting smartlist index to int implicitly, as it may trigger
  3047. a warning (-Wshorten-64-to-32). Fixes bug 26282; bugfix on
  3048. 0.2.3.13-alpha, 0.2.7.1-alpha and 0.2.1.1-alpha.
  3049. - Use time_t for all values in
  3050. predicted_ports_prediction_time_remaining(). Rework the code that
  3051. computes difference between durations/timestamps. Fixes bug 27165;
  3052. bugfix on 0.3.1.1-alpha.
  3053. o Minor bugfixes (client, memory usage):
  3054. - When not running as a directory cache, there is no need to store
  3055. the text of the current consensus networkstatus in RAM.
  3056. Previously, however, clients would store it anyway, at a cost of
  3057. over 5 MB. Now, they do not. Fixes bug 27247; bugfix
  3058. on 0.3.0.1-alpha.
  3059. o Minor bugfixes (client, reachableaddresses):
  3060. - Instead of adding a "reject *:*" line to ReachableAddresses when
  3061. loading the configuration, add one to the policy after parsing it
  3062. in parse_reachable_addresses(). This prevents extra "reject *.*"
  3063. lines from accumulating on reloads. Fixes bug 20874; bugfix on
  3064. 0.1.1.5-alpha. Patch by Neel Chauhan.
  3065. o Minor bugfixes (code quality):
  3066. - Rename sandbox_getaddrinfo() and other functions to no longer
  3067. misleadingly suggest that they are sandbox-only. Fixes bug 26525;
  3068. bugfix on 0.2.7.1-alpha.
  3069. o Minor bugfixes (configuration, Onion Services):
  3070. - In rend_service_parse_port_config(), disallow any input to remain
  3071. after address-port pair was parsed. This will catch address and
  3072. port being whitespace-separated by mistake of the user. Fixes bug
  3073. 27044; bugfix on 0.2.9.10.
  3074. o Minor bugfixes (continuous integration):
  3075. - Stop reinstalling identical packages in our Windows CI. Fixes bug
  3076. 27464; bugfix on 0.3.4.1-alpha.
  3077. o Minor bugfixes (controller):
  3078. - Consider all routerinfo errors other than "not a server" to be
  3079. transient for the purpose of "GETINFO exit-policy/*" controller
  3080. request. Print stacktrace in the unlikely case of failing to
  3081. recompute routerinfo digest. Fixes bug 27034; bugfix
  3082. on 0.3.4.1-alpha.
  3083. o Minor bugfixes (directory connection shutdown):
  3084. - Avoid a double-close when shutting down a stalled directory
  3085. connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
  3086. o Minor bugfixes (HTTP tunnel):
  3087. - Fix a bug warning when closing an HTTP tunnel connection due to an
  3088. HTTP request we couldn't handle. Fixes bug 26470; bugfix
  3089. on 0.3.2.1-alpha.
  3090. o Minor bugfixes (ipv6):
  3091. - In addrs_in_same_network_family(), we choose the subnet size based
  3092. on the IP version (IPv4 or IPv6). Previously, we chose a fixed
  3093. subnet size of /16 for both IPv4 and IPv6 addresses. Fixes bug
  3094. 15518; bugfix on 0.2.3.1-alpha. Patch by Neel Chauhan.
  3095. o Minor bugfixes (logging):
  3096. - As a precaution, do an early return from log_addr_has_changed() if
  3097. Tor is running as client. Also, log a stack trace for debugging as
  3098. this function should only be called when Tor runs as server. Fixes
  3099. bug 26892; bugfix on 0.1.1.9-alpha.
  3100. - Refrain from mentioning bug 21018 in the logs, as it is already
  3101. fixed. Fixes bug 25477; bugfix on 0.2.9.8.
  3102. o Minor bugfixes (logging, documentation):
  3103. - When SafeLogging is enabled, scrub IP address in
  3104. channel_tls_process_netinfo_cell(). Also, add a note to manpage
  3105. that scrubbing is not guaranteed on loglevels below Notice. Fixes
  3106. bug 26882; bugfix on 0.2.4.10-alpha.
  3107. o Minor bugfixes (netflow padding):
  3108. - Ensure circuitmux queues are empty before scheduling or sending
  3109. padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
  3110. o Minor bugfixes (onion service v2):
  3111. - Log at level "info", not "warning", in the case that we do not
  3112. have a consensus when a .onion request comes in. This can happen
  3113. normally while bootstrapping. Fixes bug 27040; bugfix
  3114. on 0.2.8.2-alpha.
  3115. o Minor bugfixes (onion service v3):
  3116. - When the onion service directory can't be created or has the wrong
  3117. permissions, do not log a stack trace. Fixes bug 27335; bugfix
  3118. on 0.3.2.1-alpha.
  3119. o Minor bugfixes (OS compatibility):
  3120. - Properly handle configuration changes that move a listener to/from
  3121. wildcard IP address. If the first attempt to bind a socket fails,
  3122. close the old listener and try binding the socket again. Fixes bug
  3123. 17873; bugfix on 0.0.8pre-1.
  3124. o Minor bugfixes (performance)::
  3125. - Rework node_is_a_configured_bridge() to no longer call
  3126. node_get_all_orports(), which was performing too many memory
  3127. allocations. Fixes bug 27224; bugfix on 0.2.3.9.
  3128. o Minor bugfixes (relay statistics):
  3129. - Update relay descriptor on bandwidth changes only when the uptime
  3130. is smaller than 24h, in order to reduce the efficiency of guard
  3131. discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
  3132. o Minor bugfixes (relays):
  3133. - Consider the fact that we'll be making direct connections to our
  3134. entry and guard nodes when computing the fraction of nodes that
  3135. have their descriptors. Also, if we are using bridges and there is
  3136. at least one bridge with a full descriptor, treat the fraction of
  3137. guards available as 100%. Fixes bug 25886; bugfix on 0.2.4.10-alpha.
  3138. Patch by Neel Chauhan.
  3139. - Update the message logged on relays when DirCache is disabled.
  3140. Since 0.3.3.5-rc, authorities require DirCache (V2Dir) for the
  3141. Guard flag. Fixes bug 24312; bugfix on 0.3.3.5-rc.
  3142. o Minor bugfixes (rust, protover):
  3143. - Compute protover votes correctly in the rust version of the
  3144. protover code. Previously, the protover rewrite in 24031 allowed
  3145. repeated votes from the same voter for the same protocol version
  3146. to be counted multiple times in protover_compute_vote(). Fixes bug
  3147. 27649; bugfix on 0.3.3.5-rc.
  3148. - Reject protover names that contain invalid characters. Fixes bug
  3149. 27687; bugfix on 0.3.3.1-alpha.
  3150. o Minor bugfixes (testing):
  3151. - Fix two unit tests to work when HOME environment variable is not
  3152. set. Fixes bug 27096; bugfix on 0.2.8.1-alpha.
  3153. - If a unit test running in a subprocess exits abnormally or with a
  3154. nonzero status code, treat the test as having failed, even if the
  3155. test reported success. Without this fix, memory leaks don't cause
  3156. the tests to fail, even with LeakSanitizer. Fixes bug 27658;
  3157. bugfix on 0.2.2.4-alpha.
  3158. - When logging a version mismatch in our openssl_version tests,
  3159. report the actual offending version strings. Fixes bug 26152;
  3160. bugfix on 0.2.9.1-alpha.
  3161. - Fix forking tests on Windows when there is a space somewhere in
  3162. the path. Fixes bug 26437; bugfix on 0.2.2.4-alpha.
  3163. o Code simplification and refactoring:
  3164. - 'updateFallbackDirs.py' now ignores the blacklist file, as it's not
  3165. longer needed. Closes ticket 26502.
  3166. - Include paths to header files within Tor are now qualified by
  3167. directory within the top-level src directory.
  3168. - Many structures have been removed from the centralized "or.h"
  3169. header, and moved into their own headers. This will allow us to
  3170. reduce the number of places in the code that rely on each
  3171. structure's contents and layout. Closes ticket 26383.
  3172. - Remove ATTR_NONNULL macro from codebase. Resolves ticket 26527.
  3173. - Remove GetAdaptersAddresses_fn_t. The code that used it was
  3174. removed as part of the 26481 refactor. Closes ticket 27467.
  3175. - Rework Tor SOCKS server code to use Trunnel and benefit from
  3176. autogenerated functions for parsing and generating SOCKS wire
  3177. format. New implementation is cleaner, more maintainable and
  3178. should be less prone to heartbleed-style vulnerabilities.
  3179. Implements a significant fraction of ticket 3569.
  3180. - Split sampled_guards_update_from_consensus() and
  3181. select_entry_guard_for_circuit() into subfunctions. In
  3182. entry_guards_update_primary() unite three smartlist enumerations
  3183. into one and move smartlist comparison code out of the function.
  3184. Closes ticket 21349.
  3185. - Tor now assumes that you have standards-conformant stdint.h and
  3186. inttypes.h headers when compiling. Closes ticket 26626.
  3187. - Unify our bloom filter logic. Previously we had two copies of this
  3188. code: one for routerlist filtering, and one for address set
  3189. calculations. Closes ticket 26510.
  3190. - Use the simpler strcmpstart() helper in
  3191. rend_parse_v2_service_descriptor instead of strncmp(). Closes
  3192. ticket 27630.
  3193. - Utility functions that can perform a DNS lookup are now wholly
  3194. separated from those that can't, in separate headers and C
  3195. modules. Closes ticket 26526.
  3196. o Documentation:
  3197. - Copy paragraph and URL to Tor's code of conduct document from
  3198. CONTRIBUTING to new CODE_OF_CONDUCT file. Resolves ticket 26638.
  3199. - Remove old instructions from INSTALL document. Closes ticket 26588.
  3200. - Warn users that they should not include MyFamily line(s) in their
  3201. torrc when running Tor bridge. Closes ticket 26908.
  3202. o Removed features:
  3203. - Tor no longer supports building with the dmalloc library. For
  3204. debugging memory issues, we suggest using gperftools or msan
  3205. instead. Closes ticket 26426.
  3206. - Tor no longer attempts to run on Windows environments without the
  3207. GetAdaptersAddresses() function. This function has existed since
  3208. Windows XP, which is itself already older than we support.
  3209. - Remove Tor2web functionality for version 2 onion services. The
  3210. Tor2webMode and Tor2webRendezvousPoints options are now obsolete.
  3211. (This feature was never shipped in vanilla Tor and it was only
  3212. possible to use this feature by building the support at compile
  3213. time. Tor2webMode is not implemented for version 3 onion services.)
  3214. Closes ticket 26367.
  3215. Changes in version 0.2.9.17 - 2018-09-10
  3216. Tor 0.2.9.17 backports numerous bugfixes from later versions of Tor.
  3217. o Minor features (compatibility, backport from 0.3.4.8):
  3218. - Tell OpenSSL to maintain backward compatibility with previous
  3219. RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
  3220. ciphers are disabled by default. Closes ticket 27344.
  3221. o Minor features (continuous integration, backport from 0.3.4.7-rc):
  3222. - Enable macOS builds in our Travis CI configuration. Closes
  3223. ticket 24629.
  3224. - Install libcap-dev and libseccomp2-dev so these optional
  3225. dependencies get tested on Travis CI. Closes ticket 26560.
  3226. - Run asciidoc during Travis CI. Implements ticket 27087.
  3227. - Use ccache in our Travis CI configuration. Closes ticket 26952.
  3228. o Minor features (geoip):
  3229. - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
  3230. Country database. Closes ticket 27089.
  3231. o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
  3232. - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
  3233. tell the compiler not to include the system malloc implementation.
  3234. Fixes bug 20424; bugfix on 0.2.0.20-rc.
  3235. o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
  3236. - Silence a spurious compiler warning on the GetAdaptersAddresses
  3237. function pointer cast. This issue is already fixed by 26481 in
  3238. 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
  3239. bugfix on 0.2.3.11-alpha.
  3240. - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
  3241. supported, and always fails. Some compilers warn about the
  3242. function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
  3243. on 0.2.2.23-alpha.
  3244. o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
  3245. - Don't link or search for pthreads when building for Windows, even
  3246. if we are using build environment (like mingw) that provides a
  3247. pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
  3248. o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
  3249. - Skip a pair of unreliable key generation tests on Windows, until
  3250. the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
  3251. bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
  3252. o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
  3253. - Pass the module flags to distcheck configure, and log the flags
  3254. before running configure. (Backported to 0.2.9 and later as a
  3255. precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
  3256. o Minor bugfixes (continuous integration, backport from 0.3.4.8):
  3257. - When a Travis build fails, and showing a log fails, keep trying to
  3258. show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
  3259. - When we use echo in Travis, don't pass a --flag as the first
  3260. argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
  3261. o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
  3262. - When voting for recommended versions, make sure that all of the
  3263. versions are well-formed and parsable. Fixes bug 26485; bugfix
  3264. on 0.1.1.6-alpha.
  3265. o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
  3266. - Fix a bug in out sandboxing rules for the openat() syscall.
  3267. Previously, no openat() call would be permitted, which would break
  3268. filesystem operations on recent glibc versions. Fixes bug 25440;
  3269. bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
  3270. o Minor bugfixes (onion services, backport from 0.3.4.8):
  3271. - Silence a spurious compiler warning in
  3272. rend_client_send_introduction(). Fixes bug 27463; bugfix
  3273. on 0.1.1.2-alpha.
  3274. o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
  3275. - Log a protocol warning when single onion services or Tor2web clients
  3276. fail to authenticate direct connections to relays.
  3277. Fixes bug 26924; bugfix on 0.2.9.1-alpha.
  3278. o Minor bugfixes (testing, backport from 0.3.4.6-rc):
  3279. - Disable core dumps in test_bt.sh, to avoid failures in "make
  3280. distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
  3281. o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
  3282. - Before running make test-network-all, delete old logs and test
  3283. result files, to avoid spurious failures. Fixes bug 27295; bugfix
  3284. on 0.2.7.3-rc.
  3285. o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
  3286. - Our "tortls/cert_matches_key" unit test no longer relies on
  3287. OpenSSL internals. Previously, it relied on unsupported OpenSSL
  3288. behavior in a way that caused it to crash with OpenSSL 1.0.2p.
  3289. Fixes bug 27226; bugfix on 0.2.5.1-alpha.
  3290. o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
  3291. - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
  3292. 27185; bugfix on 0.2.2.2-alpha.
  3293. Changes in version 0.3.2.12 - 2018-09-10
  3294. Tor 0.3.2.12 backport numerous fixes from later versions of Tor.
  3295. o Minor features (compatibility, backport from 0.3.4.8):
  3296. - Tell OpenSSL to maintain backward compatibility with previous
  3297. RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
  3298. ciphers are disabled by default. Closes ticket 27344.
  3299. o Minor features (continuous integration, backport from 0.3.4.7-rc):
  3300. - Enable macOS builds in our Travis CI configuration. Closes
  3301. ticket 24629.
  3302. - Install libcap-dev and libseccomp2-dev so these optional
  3303. dependencies get tested on Travis CI. Closes ticket 26560.
  3304. - Run asciidoc during Travis CI. Implements ticket 27087.
  3305. - Use ccache in our Travis CI configuration. Closes ticket 26952.
  3306. o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
  3307. - Use cargo cache in our Travis CI configuration. Closes
  3308. ticket 26952.
  3309. o Minor features (controller, backport from 0.3.4.6-rc):
  3310. - The control port now exposes the list of HTTPTunnelPorts and
  3311. ExtOrPorts via GETINFO net/listeners/httptunnel and
  3312. net/listeners/extor respectively. Closes ticket 26647.
  3313. o Minor features (directory authorities, backport from 0.3.4.7-rc):
  3314. - Authorities no longer vote to make the subprotocol version
  3315. "LinkAuth=1" a requirement: it is unsupportable with NSS, and
  3316. hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
  3317. o Minor features (geoip):
  3318. - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
  3319. Country database. Closes ticket 27089.
  3320. o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
  3321. - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
  3322. tell the compiler not to include the system malloc implementation.
  3323. Fixes bug 20424; bugfix on 0.2.0.20-rc.
  3324. - Don't try to use a pragma to temporarily disable the
  3325. -Wunused-const-variable warning if the compiler doesn't support
  3326. it. Fixes bug 26785; bugfix on 0.3.2.11.
  3327. o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
  3328. - Silence a spurious compiler warning on the GetAdaptersAddresses
  3329. function pointer cast. This issue is already fixed by 26481 in
  3330. 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
  3331. bugfix on 0.2.3.11-alpha.
  3332. - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
  3333. supported, and always fails. Some compilers warn about the
  3334. function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
  3335. on 0.2.2.23-alpha.
  3336. o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
  3337. - Don't link or search for pthreads when building for Windows, even
  3338. if we are using build environment (like mingw) that provides a
  3339. pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
  3340. o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
  3341. - Skip a pair of unreliable key generation tests on Windows, until
  3342. the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
  3343. bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
  3344. o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
  3345. - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
  3346. - Pass the module flags to distcheck configure, and log the flags
  3347. before running configure. (Backported to 0.2.9 and later as a
  3348. precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
  3349. o Minor bugfixes (continuous integration, backport from 0.3.4.8):
  3350. - When a Travis build fails, and showing a log fails, keep trying to
  3351. show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
  3352. - When we use echo in Travis, don't pass a --flag as the first
  3353. argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
  3354. o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
  3355. - When voting for recommended versions, make sure that all of the
  3356. versions are well-formed and parsable. Fixes bug 26485; bugfix
  3357. on 0.1.1.6-alpha.
  3358. o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
  3359. - Fix a bug in out sandboxing rules for the openat() syscall.
  3360. Previously, no openat() call would be permitted, which would break
  3361. filesystem operations on recent glibc versions. Fixes bug 25440;
  3362. bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
  3363. o Minor bugfixes (logging, backport from 0.3.4.6-rc):
  3364. - Improve the log message when connection initiators fail to
  3365. authenticate direct connections to relays. Fixes bug 26927; bugfix
  3366. on 0.3.0.1-alpha.
  3367. o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
  3368. - Fix bug that causes services to not ever rotate their descriptors
  3369. if they were getting SIGHUPed often. Fixes bug 26932; bugfix
  3370. on 0.3.2.1-alpha.
  3371. o Minor bugfixes (onion services, backport from 0.3.4.8):
  3372. - Silence a spurious compiler warning in
  3373. rend_client_send_introduction(). Fixes bug 27463; bugfix
  3374. on 0.1.1.2-alpha.
  3375. o Minor bugfixes (rust, backport from 0.3.4.7-rc):
  3376. - Backport test_rust.sh from master. Fixes bug 26497; bugfix
  3377. on 0.3.1.5-alpha.
  3378. - Consistently use ../../.. as a fallback for $abs_top_srcdir in
  3379. test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
  3380. - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
  3381. $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
  3382. o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
  3383. - Log a protocol warning when single onion services or Tor2web clients
  3384. fail to authenticate direct connections to relays.
  3385. Fixes bug 26924; bugfix on 0.2.9.1-alpha.
  3386. o Minor bugfixes (testing, backport from 0.3.4.6-rc):
  3387. - Disable core dumps in test_bt.sh, to avoid failures in "make
  3388. distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
  3389. o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
  3390. - When running make test-network-all, use the mixed+hs-v2 network.
  3391. (A previous fix to chutney removed v3 onion services from the
  3392. mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
  3393. confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
  3394. - Before running make test-network-all, delete old logs and test
  3395. result files, to avoid spurious failures. Fixes bug 27295; bugfix
  3396. on 0.2.7.3-rc.
  3397. o Minor bugfixes (testing, openssl compatibility):
  3398. - Our "tortls/cert_matches_key" unit test no longer relies on OpenSSL
  3399. internals. Previously, it relied on unsupported OpenSSL behavior in
  3400. a way that caused it to crash with OpenSSL 1.0.2p. Fixes bug 27226;
  3401. bugfix on 0.2.5.1-alpha.
  3402. o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
  3403. - Our "tortls/cert_matches_key" unit test no longer relies on
  3404. OpenSSL internals. Previously, it relied on unsupported OpenSSL
  3405. behavior in a way that caused it to crash with OpenSSL 1.0.2p.
  3406. Fixes bug 27226; bugfix on 0.2.5.1-alpha.
  3407. o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
  3408. - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
  3409. 27185; bugfix on 0.2.2.2-alpha.
  3410. Changes in version 0.3.3.10 - 2018-09-10
  3411. Tor 0.3.3.10 backports numerous fixes from later versions of Tor.
  3412. o Minor features (bug workaround, backport from 0.3.4.7-rc):
  3413. - Compile correctly on systems that provide the C11 stdatomic.h
  3414. header, but where C11 atomic functions don't actually compile.
  3415. Closes ticket 26779; workaround for Debian issue 903709.
  3416. o Minor features (compatibility, backport from 0.3.4.8):
  3417. - Tell OpenSSL to maintain backward compatibility with previous
  3418. RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
  3419. ciphers are disabled by default. Closes ticket 27344.
  3420. o Minor features (continuous integration, backport from 0.3.4.7-rc):
  3421. - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
  3422. - Enable macOS builds in our Travis CI configuration. Closes
  3423. ticket 24629.
  3424. - Install libcap-dev and libseccomp2-dev so these optional
  3425. dependencies get tested on Travis CI. Closes ticket 26560.
  3426. - Run asciidoc during Travis CI. Implements ticket 27087.
  3427. - Use ccache in our Travis CI configuration. Closes ticket 26952.
  3428. o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
  3429. - Use cargo cache in our Travis CI configuration. Closes
  3430. ticket 26952.
  3431. o Minor features (controller, backport from 0.3.4.6-rc):
  3432. - The control port now exposes the list of HTTPTunnelPorts and
  3433. ExtOrPorts via GETINFO net/listeners/httptunnel and
  3434. net/listeners/extor respectively. Closes ticket 26647.
  3435. o Minor features (directory authorities, backport from 0.3.4.7-rc):
  3436. - Authorities no longer vote to make the subprotocol version
  3437. "LinkAuth=1" a requirement: it is unsupportable with NSS, and
  3438. hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
  3439. o Minor features (geoip):
  3440. - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
  3441. Country database. Closes ticket 27089.
  3442. o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
  3443. - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
  3444. tell the compiler not to include the system malloc implementation.
  3445. Fixes bug 20424; bugfix on 0.2.0.20-rc.
  3446. - Don't try to use a pragma to temporarily disable the
  3447. -Wunused-const-variable warning if the compiler doesn't support
  3448. it. Fixes bug 26785; bugfix on 0.3.2.11.
  3449. o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
  3450. - Silence a spurious compiler warning on the GetAdaptersAddresses
  3451. function pointer cast. This issue is already fixed by 26481 in
  3452. 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
  3453. bugfix on 0.2.3.11-alpha.
  3454. - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
  3455. supported, and always fails. Some compilers warn about the
  3456. function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
  3457. on 0.2.2.23-alpha.
  3458. o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
  3459. - Don't link or search for pthreads when building for Windows, even
  3460. if we are using build environment (like mingw) that provides a
  3461. pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
  3462. o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
  3463. - Skip a pair of unreliable key generation tests on Windows, until
  3464. the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
  3465. bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
  3466. o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
  3467. - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
  3468. - Pass the module flags to distcheck configure, and log the flags
  3469. before running configure. (Backported to 0.2.9 and later as a
  3470. precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
  3471. o Minor bugfixes (continuous integration, backport from 0.3.4.8):
  3472. - When a Travis build fails, and showing a log fails, keep trying to
  3473. show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
  3474. - When we use echo in Travis, don't pass a --flag as the first
  3475. argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
  3476. o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
  3477. - When voting for recommended versions, make sure that all of the
  3478. versions are well-formed and parsable. Fixes bug 26485; bugfix
  3479. on 0.1.1.6-alpha.
  3480. o Minor bugfixes (in-process restart, backport from 0.3.4.7-rc):
  3481. - Always call tor_free_all() when leaving tor_run_main(). When we
  3482. did not, restarting tor in-process would cause an assertion
  3483. failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
  3484. o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
  3485. - Fix a bug in our sandboxing rules for the openat() syscall.
  3486. Previously, no openat() call would be permitted, which would break
  3487. filesystem operations on recent glibc versions. Fixes bug 25440;
  3488. bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
  3489. o Minor bugfixes (logging, backport from 0.3.4.6-rc):
  3490. - Improve the log message when connection initiators fail to
  3491. authenticate direct connections to relays. Fixes bug 26927; bugfix
  3492. on 0.3.0.1-alpha.
  3493. o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
  3494. - Fix bug that causes services to not ever rotate their descriptors
  3495. if they were getting SIGHUPed often. Fixes bug 26932; bugfix
  3496. on 0.3.2.1-alpha.
  3497. o Minor bugfixes (onion services, backport from 0.3.4.8):
  3498. - Silence a spurious compiler warning in
  3499. rend_client_send_introduction(). Fixes bug 27463; bugfix
  3500. on 0.1.1.2-alpha.
  3501. o Minor bugfixes (portability, backport from 0.3.4.6-rc):
  3502. - Work around two different bugs in the OS X 10.10 and later SDKs
  3503. that would prevent us from successfully targeting earlier versions
  3504. of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
  3505. o Minor bugfixes (portability, backport from 0.3.4.7-rc):
  3506. - Fix compilation of the unit tests on GNU/Hurd, which does not
  3507. define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
  3508. from "paulusASol".
  3509. o Minor bugfixes (rust, backport from 0.3.4.7-rc):
  3510. - Backport test_rust.sh from master. Fixes bug 26497; bugfix
  3511. on 0.3.1.5-alpha.
  3512. - Consistently use ../../.. as a fallback for $abs_top_srcdir in
  3513. test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
  3514. - Protover parsing was accepting the presence of whitespace in
  3515. version strings, which the C implementation would choke on, e.g.
  3516. "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
  3517. - Protover parsing was ignoring a 2nd hyphen and everything after
  3518. it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
  3519. on 0.3.3.1-alpha.
  3520. - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
  3521. $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
  3522. - cd to ${abs_top_builddir}/src/rust before running cargo in
  3523. src/test/test_rust.sh. This makes the working directory consistent
  3524. between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
  3525. o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
  3526. - Log a protocol warning when single onion services or Tor2web clients
  3527. fail to authenticate direct connections to relays.
  3528. Fixes bug 26924; bugfix on 0.2.9.1-alpha.
  3529. o Minor bugfixes (testing, backport from 0.3.4.6-rc):
  3530. - Disable core dumps in test_bt.sh, to avoid failures in "make
  3531. distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
  3532. o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
  3533. - When running make test-network-all, use the mixed+hs-v2 network.
  3534. (A previous fix to chutney removed v3 onion services from the
  3535. mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
  3536. confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
  3537. - Before running make test-network-all, delete old logs and test
  3538. result files, to avoid spurious failures. Fixes bug 27295; bugfix
  3539. on 0.2.7.3-rc.
  3540. o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
  3541. - Our "tortls/cert_matches_key" unit test no longer relies on
  3542. OpenSSL internals. Previously, it relied on unsupported OpenSSL
  3543. behavior in a way that caused it to crash with OpenSSL 1.0.2p.
  3544. Fixes bug 27226; bugfix on 0.2.5.1-alpha.
  3545. o Minor bugfixes (v3 onion services, backport from 0.3.4.6-rc):
  3546. - Stop sending ed25519 link specifiers in v3 onion service introduce
  3547. cells and descriptors, when the rendezvous or introduction point
  3548. doesn't support ed25519 link authentication. Fixes bug 26627;
  3549. bugfix on 0.3.2.4-alpha.
  3550. o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
  3551. - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
  3552. 27185; bugfix on 0.2.2.2-alpha.
  3553. Changes in version 0.3.4.8 - 2018-09-10
  3554. Tor 0.3.4.8 is the first stable release in its series; it includes
  3555. compilation and portability fixes.
  3556. The Tor 0.3.4 series includes improvements for running Tor in
  3557. low-power and embedded environments, which should help performance in
  3558. general. We've begun work on better modularity, and included preliminary
  3559. changes on the directory authority side to accommodate a new bandwidth
  3560. measurement system. We've also integrated more continuous-integration
  3561. systems into our development process, and made corresponding changes to
  3562. Tor's testing infrastructure. Finally, we've continued to refine
  3563. our anti-denial-of-service code.
  3564. Below are the changes since 0.3.4.7-rc. For a complete list of changes
  3565. since 0.3.3.9, see the ReleaseNotes file.
  3566. o Minor features (compatibility):
  3567. - Tell OpenSSL to maintain backward compatibility with previous
  3568. RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
  3569. ciphers are disabled by default. Closes ticket 27344.
  3570. o Minor features (continuous integration):
  3571. - Log the compiler path and version during Appveyor builds.
  3572. Implements ticket 27449.
  3573. - Show config.log and test-suite.log after failed Appveyor builds.
  3574. Also upload the zipped full logs as a build artifact. Implements
  3575. ticket 27430.
  3576. o Minor bugfixes (compilation):
  3577. - Silence a spurious compiler warning on the GetAdaptersAddresses
  3578. function pointer cast. This issue is already fixed by 26481 in
  3579. 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
  3580. bugfix on 0.2.3.11-alpha.
  3581. - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
  3582. supported, and always fails. Some compilers warn about the
  3583. function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
  3584. on 0.2.2.23-alpha.
  3585. o Minor bugfixes (continuous integration):
  3586. - Disable gcc hardening in Appveyor Windows 64-bit builds. As of
  3587. August 29 2018, Appveyor images come with gcc 8.2.0 by default.
  3588. Executables compiled for 64-bit Windows with this version of gcc
  3589. crash when Tor's --enable-gcc-hardening flag is set. Fixes bug
  3590. 27460; bugfix on 0.3.4.1-alpha.
  3591. - When a Travis build fails, and showing a log fails, keep trying to
  3592. show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
  3593. - When we use echo in Travis, don't pass a --flag as the first
  3594. argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
  3595. o Minor bugfixes (onion services):
  3596. - Silence a spurious compiler warning in
  3597. rend_client_send_introduction(). Fixes bug 27463; bugfix
  3598. on 0.1.1.2-alpha.
  3599. o Minor bugfixes (testing, chutney):
  3600. - When running make test-network-all, use the mixed+hs-v2 network.
  3601. (A previous fix to chutney removed v3 onion services from the
  3602. mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
  3603. confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
  3604. - Before running make test-network-all, delete old logs and test
  3605. result files, to avoid spurious failures. Fixes bug 27295; bugfix
  3606. on 0.2.7.3-rc.
  3607. Changes in version 0.3.4.7-rc - 2018-08-24
  3608. Tor 0.3.4.7-rc fixes several small compilation, portability, and
  3609. correctness issues in previous versions of Tor. This version is a
  3610. release candidate: if no serious bugs are found, we expect that the
  3611. stable 0.3.4 release will be (almost) the same as this release.
  3612. o Minor features (bug workaround):
  3613. - Compile correctly on systems that provide the C11 stdatomic.h
  3614. header, but where C11 atomic functions don't actually compile.
  3615. Closes ticket 26779; workaround for Debian issue 903709.
  3616. o Minor features (continuous integration):
  3617. - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
  3618. - Enable macOS builds in our Travis CI configuration. Closes
  3619. ticket 24629.
  3620. - Install libcap-dev and libseccomp2-dev so these optional
  3621. dependencies get tested on Travis CI. Closes ticket 26560.
  3622. - Only post Appveyor IRC notifications when the build fails.
  3623. Implements ticket 27275.
  3624. - Run asciidoc during Travis CI. Implements ticket 27087.
  3625. - Use ccache in our Travis CI configuration. Closes ticket 26952.
  3626. o Minor features (continuous integration, rust):
  3627. - Use cargo cache in our Travis CI configuration. Closes
  3628. ticket 26952.
  3629. o Minor features (directory authorities):
  3630. - Authorities no longer vote to make the subprotocol version
  3631. "LinkAuth=1" a requirement: it is unsupportable with NSS, and
  3632. hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
  3633. o Minor features (geoip):
  3634. - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
  3635. Country database. Closes ticket 27089.
  3636. o Minor bugfixes (compilation, windows):
  3637. - Don't link or search for pthreads when building for Windows, even
  3638. if we are using build environment (like mingw) that provides a
  3639. pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
  3640. o Minor bugfixes (continuous integration):
  3641. - Improve Appveyor CI IRC logging. Generate correct branches and
  3642. URLs for pull requests and tags. Use unambiguous short commits.
  3643. Fixes bug 26979; bugfix on master.
  3644. - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
  3645. - Pass the module flags to distcheck configure, and log the flags
  3646. before running configure. (Backported to 0.2.9 and later as a
  3647. precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
  3648. o Minor bugfixes (in-process restart):
  3649. - Always call tor_free_all() when leaving tor_run_main(). When we
  3650. did not, restarting tor in-process would cause an assertion
  3651. failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
  3652. o Minor bugfixes (linux seccomp2 sandbox):
  3653. - Fix a bug in out sandboxing rules for the openat() syscall.
  3654. Previously, no openat() call would be permitted, which would break
  3655. filesystem operations on recent glibc versions. Fixes bug 25440;
  3656. bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
  3657. o Minor bugfixes (onion services):
  3658. - Fix bug that causes services to not ever rotate their descriptors
  3659. if they were getting SIGHUPed often. Fixes bug 26932; bugfix
  3660. on 0.3.2.1-alpha.
  3661. o Minor bugfixes (portability):
  3662. - Fix compilation of the unit tests on GNU/Hurd, which does not
  3663. define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
  3664. from "paulusASol".
  3665. o Minor bugfixes (rust):
  3666. - Backport test_rust.sh from master. Fixes bug 26497; bugfix
  3667. on 0.3.1.5-alpha.
  3668. - Consistently use ../../.. as a fallback for $abs_top_srcdir in
  3669. test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
  3670. - Protover parsing was accepting the presence of whitespace in
  3671. version strings, which the C implementation would choke on, e.g.
  3672. "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
  3673. - Protover parsing was ignoring a 2nd hyphen and everything after
  3674. it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
  3675. on 0.3.3.1-alpha.
  3676. - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
  3677. $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
  3678. - cd to ${abs_top_builddir}/src/rust before running cargo in
  3679. src/test/test_rust.sh. This makes the working directory consistent
  3680. between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
  3681. o Minor bugfixes (testing, bootstrap):
  3682. - When calculating bootstrap progress, check exit policies and the
  3683. exit flag. Previously, Tor would only check the exit flag, which
  3684. caused race conditions in small and fast networks like chutney.
  3685. Fixes bug 27236; bugfix on 0.2.6.3-alpha.
  3686. o Minor bugfixes (testing, openssl compatibility):
  3687. - Our "tortls/cert_matches_key" unit test no longer relies on
  3688. OpenSSL internals. Previously, it relied on unsupported OpenSSL
  3689. behavior in a way that caused it to crash with OpenSSL 1.0.2p.
  3690. Fixes bug 27226; bugfix on 0.2.5.1-alpha.
  3691. o Minor bugfixes (Windows, compilation):
  3692. - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
  3693. 27185; bugfix on 0.2.2.2-alpha.
  3694. Changes in version 0.3.4.6-rc - 2018-08-06
  3695. Tor 0.3.4.6-rc fixes several small compilation, portability, and
  3696. correctness issues in previous versions of Tor. This version is a
  3697. release candidate: if no serious bugs are found, we expect that the
  3698. stable 0.3.4 release will be (almost) the same as this release.
  3699. o Major bugfixes (event scheduler):
  3700. - When we enable a periodic event, schedule it in the event loop
  3701. rather than running it immediately. Previously, we would re-run
  3702. periodic events immediately in the middle of (for example)
  3703. changing our options, with unpredictable effects. Fixes bug 27003;
  3704. bugfix on 0.3.4.1-alpha.
  3705. o Minor features (compilation):
  3706. - When building Tor, prefer to use Python 3 over Python 2, and more
  3707. recent (contemplated) versions over older ones. Closes
  3708. ticket 26372.
  3709. - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
  3710. tell the compiler not to include the system malloc implementation.
  3711. Fixes bug 20424; bugfix on 0.2.0.20-rc.
  3712. - Don't try to use a pragma to temporarily disable the
  3713. -Wunused-const-variable warning if the compiler doesn't support
  3714. it. Fixes bug 26785; bugfix on 0.3.2.11.
  3715. o Minor bugfixes (continuous integration):
  3716. - Skip a pair of unreliable key generation tests on Windows, until
  3717. the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
  3718. bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
  3719. o Minor features (controller):
  3720. - The control port now exposes the list of HTTPTunnelPorts and
  3721. ExtOrPorts via GETINFO net/listeners/httptunnel and
  3722. net/listeners/extor respectively. Closes ticket 26647.
  3723. o Minor bugfixes (directory authority):
  3724. - When voting for recommended versions, make sure that all of the
  3725. versions are well-formed and parsable. Fixes bug 26485; bugfix
  3726. on 0.1.1.6-alpha.
  3727. o Minor features (geoip):
  3728. - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
  3729. Country database. Closes ticket 26674.
  3730. o Minor features (Rust, portability):
  3731. - Rust cross-compilation is now supported. Closes ticket 25895.
  3732. o Minor bugfixes (compilation):
  3733. - Update build system so that tor builds again with --disable-unittests
  3734. after recent refactoring. Fixes bug 26789; bugfix on 0.3.4.3-alpha.
  3735. - Fix a compilation warning on some versions of GCC when building
  3736. code that calls routerinfo_get_my_routerinfo() twice, assuming
  3737. that the second call will succeed if the first one did. Fixes bug
  3738. 26269; bugfix on 0.2.8.2-alpha.
  3739. o Minor bugfixes (controller):
  3740. - Report the port correctly when a port is configured to bind to
  3741. "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha.
  3742. - Parse the "HSADDRESS=" parameter in HSPOST commands properly.
  3743. Previously, it was misparsed and ignored. Fixes bug 26523; bugfix
  3744. on 0.3.3.1-alpha. Patch by "akwizgran".
  3745. o Minor bugfixes (correctness, flow control):
  3746. - Upon receiving a stream-level SENDME cell, verify that our window
  3747. has not grown too large. Fixes bug 26214; bugfix on svn
  3748. r54 (pre-0.0.1).
  3749. o Minor bugfixes (memory, correctness):
  3750. - Fix a number of small memory leaks identified by coverity. Fixes
  3751. bug 26467; bugfix on numerous Tor versions.
  3752. o Minor bugfixes (logging):
  3753. - Improve the log message when connection initiators fail to
  3754. authenticate direct connections to relays. Fixes bug 26927; bugfix
  3755. on 0.3.0.1-alpha.
  3756. o Minor bugfixes (portability):
  3757. - Avoid a compilation error in test_bwmgt.c on Solaris 10. Fixes bug
  3758. 26994; bugfix on 0.3.4.1-alpha.
  3759. - Work around two different bugs in the OS X 10.10 and later SDKs
  3760. that would prevent us from successfully targeting earlier versions
  3761. of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
  3762. o Minor bugfixes (single onion services, Tor2web):
  3763. - Log a protocol warning when single onion services or Tor2web
  3764. clients fail to authenticate direct connections to relays. Fixes
  3765. bug 26924; bugfix on 0.2.9.1-alpha.
  3766. o Minor bugfixes (testing):
  3767. - Disable core dumps in test_bt.sh, to avoid failures in "make
  3768. distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
  3769. o Minor bugfixes (testing, compatibility):
  3770. - When running the ntor_ref.py and hs_ntor_ref.py tests, make sure
  3771. only to pass strings (rather than "bytes" objects) to the Python
  3772. subprocess module. Python 3 on Windows seems to require this.
  3773. Fixes bug 26535; bugfix on 0.2.5.5-alpha (for ntor_ref.py) and
  3774. 0.3.1.1-alpha (for hs_ntor_ref.py).
  3775. o Minor bugfixes (v3 onion services):
  3776. - Stop sending ed25519 link specifiers in v3 onion service introduce
  3777. cells and descriptors, when the rendezvous or introduction point
  3778. doesn't support ed25519 link authentication. Fixes bug 26627;
  3779. bugfix on 0.3.2.4-alpha.
  3780. Changes in version 0.3.4.5-rc - 2018-07-13
  3781. Tor 0.3.4.5-rc moves to a new bridge authority, meaning people running
  3782. bridge relays should upgrade.
  3783. o Directory authority changes:
  3784. - The "Bifroest" bridge authority has been retired; the new bridge
  3785. authority is "Serge", and it is operated by George from the
  3786. TorBSD project. Closes ticket 26771.
  3787. Changes in version 0.3.3.9 - 2018-07-13
  3788. Tor 0.3.3.9 moves to a new bridge authority, meaning people running
  3789. bridge relays should upgrade.
  3790. o Directory authority changes:
  3791. - The "Bifroest" bridge authority has been retired; the new bridge
  3792. authority is "Serge", and it is operated by George from the
  3793. TorBSD project. Closes ticket 26771.
  3794. Changes in version 0.3.2.11 - 2018-07-13
  3795. Tor 0.3.2.11 moves to a new bridge authority, meaning people running
  3796. bridge relays should upgrade. We also take this opportunity to backport
  3797. other minor fixes.
  3798. o Directory authority changes:
  3799. - The "Bifroest" bridge authority has been retired; the new bridge
  3800. authority is "Serge", and it is operated by George from the
  3801. TorBSD project. Closes ticket 26771.
  3802. o Directory authority changes (backport from 0.3.3.7):
  3803. - Add an IPv6 address for the "dannenberg" directory authority.
  3804. Closes ticket 26343.
  3805. o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
  3806. - When directory authorities read a zero-byte bandwidth file, they
  3807. would previously log a warning with the contents of an
  3808. uninitialised buffer. They now log a warning about the empty file
  3809. instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
  3810. o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
  3811. - Correctly detect when onion services get disabled after HUP. Fixes
  3812. bug 25761; bugfix on 0.3.2.1.
  3813. o Minor features (sandbox, backport from 0.3.3.4-alpha):
  3814. - Explicitly permit the poll() system call when the Linux
  3815. seccomp2-based sandbox is enabled: apparently, some versions of
  3816. libc use poll() when calling getpwnam(). Closes ticket 25313.
  3817. o Minor feature (continuous integration, backport from 0.3.3.5-rc):
  3818. - Update the Travis CI configuration to use the stable Rust channel,
  3819. now that we have decided to require that. Closes ticket 25714.
  3820. o Minor features (continuous integration, backport from 0.3.4.1-alpha):
  3821. - Our .travis.yml configuration now includes support for testing the
  3822. results of "make distcheck". (It's not uncommon for "make check"
  3823. to pass but "make distcheck" to fail.) Closes ticket 25814.
  3824. - Our Travis CI configuration now integrates with the Coveralls
  3825. coverage analysis tool. Closes ticket 25818.
  3826. o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha):
  3827. - Add several checks to detect whether Tor relays are uploading
  3828. their descriptors without specifying why they regenerated them.
  3829. Diagnostic for ticket 25686.
  3830. o Minor features (compilation, backport from 0.3.4.4-rc):
  3831. - When building Tor, prefer to use Python 3 over Python 2, and more
  3832. recent (contemplated) versions over older ones. Closes
  3833. ticket 26372.
  3834. o Minor features (geoip):
  3835. - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
  3836. Country database. Closes ticket 26674.
  3837. o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
  3838. - Upon receiving a malformed connected cell, stop processing the
  3839. cell immediately. Previously we would mark the connection for
  3840. close, but continue processing the cell as if the connection were
  3841. open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
  3842. o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
  3843. - Allow the nanosleep() system call, which glibc uses to implement
  3844. sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
  3845. o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
  3846. - When running the hs_ntor_ref.py test, make sure only to pass
  3847. strings (rather than "bytes" objects) to the Python subprocess
  3848. module. Python 3 on Windows seems to require this. Fixes bug
  3849. 26535; bugfix on 0.3.1.1-alpha.
  3850. - When running the ntor_ref.py test, make sure only to pass strings
  3851. (rather than "bytes" objects) to the Python subprocess module.
  3852. Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
  3853. on 0.2.5.5-alpha.
  3854. o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
  3855. - Work around a change in OpenSSL 1.1.1 where return values that
  3856. would previously indicate "no password" now indicate an empty
  3857. password. Without this workaround, Tor instances running with
  3858. OpenSSL 1.1.1 would accept descriptors that other Tor instances
  3859. would reject. Fixes bug 26116; bugfix on 0.2.5.16.
  3860. o Minor bugfixes (documentation, backport from 0.3.3.5-rc):
  3861. - Document that the PerConnBW{Rate,Burst} options will fall back to
  3862. their corresponding consensus parameters only if those parameters
  3863. are set. Previously we had claimed that these values would always
  3864. be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.
  3865. o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
  3866. - Fix a compilation warning on some versions of GCC when building
  3867. code that calls routerinfo_get_my_routerinfo() twice, assuming
  3868. that the second call will succeed if the first one did. Fixes bug
  3869. 26269; bugfix on 0.2.8.2-alpha.
  3870. o Minor bugfixes (client, backport from 0.3.4.1-alpha):
  3871. - Don't consider Tor running as a client if the ControlPort is open,
  3872. but no actual client ports are open. Fixes bug 26062; bugfix
  3873. on 0.2.9.4-alpha.
  3874. o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
  3875. - Prevent a possible out-of-bounds smartlist read in
  3876. protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
  3877. o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha):
  3878. - Fix a very unlikely (impossible, we believe) null pointer
  3879. dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
  3880. Coverity; this is CID 1430932.
  3881. o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
  3882. - Fix a memory leak when a v3 onion service is configured and gets a
  3883. SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
  3884. - When parsing the descriptor signature, look for the token plus an
  3885. extra white-space at the end. This is more correct but also will
  3886. allow us to support new fields that might start with "signature".
  3887. Fixes bug 26069; bugfix on 0.3.0.1-alpha.
  3888. o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
  3889. - Relays now correctly block attempts to re-extend to the previous
  3890. relay by Ed25519 identity. Previously they would warn in this
  3891. case, but not actually reject the attempt. Fixes bug 26158; bugfix
  3892. on 0.3.0.1-alpha.
  3893. o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
  3894. - Avoid a crash when running with DirPort set but ORPort turned off.
  3895. Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
  3896. o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
  3897. - Silence unused-const-variable warnings in zstd.h with some GCC
  3898. versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
  3899. o Minor bugfixes (testing, backport from 0.3.3.4-alpha):
  3900. - Avoid intermittent test failures due to a test that had relied on
  3901. onion service introduction point creation finishing within 5
  3902. seconds of real clock time. Fixes bug 25450; bugfix
  3903. on 0.3.1.3-alpha.
  3904. o Minor bugfixes (compilation, backport from 0.3.3.4-alpha):
  3905. - Fix a C99 compliance issue in our configuration script that caused
  3906. compilation issues when compiling Tor with certain versions of
  3907. xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.
  3908. o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
  3909. - Fix a number of small memory leaks identified by coverity. Fixes
  3910. bug 26467; bugfix on numerous Tor versions.
  3911. o Code simplification and refactoring (backport from 0.3.3.5-rc):
  3912. - Move the list of default directory authorities to its own file.
  3913. Closes ticket 24854. Patch by "beastr0".
  3914. Changes in version 0.2.9.16 - 2018-07-13
  3915. Tor 0.2.9.16 moves to a new bridge authority, meaning people running
  3916. bridge relays should upgrade. We also take this opportunity to backport
  3917. other minor fixes.
  3918. o Directory authority changes:
  3919. - The "Bifroest" bridge authority has been retired; the new bridge
  3920. authority is "Serge", and it is operated by George from the
  3921. TorBSD project. Closes ticket 26771.
  3922. o Directory authority changes (backport from 0.3.3.7):
  3923. - Add an IPv6 address for the "dannenberg" directory authority.
  3924. Closes ticket 26343.
  3925. o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
  3926. - When directory authorities read a zero-byte bandwidth file, they
  3927. would previously log a warning with the contents of an
  3928. uninitialised buffer. They now log a warning about the empty file
  3929. instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
  3930. o Minor features (sandbox, backport from 0.3.3.4-alpha):
  3931. - Explicitly permit the poll() system call when the Linux
  3932. seccomp2-based sandbox is enabled: apparently, some versions of
  3933. libc use poll() when calling getpwnam(). Closes ticket 25313.
  3934. o Minor features (continuous integration, backport from 0.3.4.1-alpha):
  3935. - Our .travis.yml configuration now includes support for testing the
  3936. results of "make distcheck". (It's not uncommon for "make check"
  3937. to pass but "make distcheck" to fail.) Closes ticket 25814.
  3938. - Our Travis CI configuration now integrates with the Coveralls
  3939. coverage analysis tool. Closes ticket 25818.
  3940. o Minor features (compilation, backport from 0.3.4.4-rc):
  3941. - When building Tor, prefer to use Python 3 over Python 2, and more
  3942. recent (contemplated) versions over older ones. Closes
  3943. ticket 26372.
  3944. o Minor features (geoip):
  3945. - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
  3946. Country database. Closes ticket 26674.
  3947. o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
  3948. - Upon receiving a malformed connected cell, stop processing the
  3949. cell immediately. Previously we would mark the connection for
  3950. close, but continue processing the cell as if the connection were
  3951. open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
  3952. o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
  3953. - Allow the nanosleep() system call, which glibc uses to implement
  3954. sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
  3955. o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
  3956. - When running the ntor_ref.py test, make sure only to pass strings
  3957. (rather than "bytes" objects) to the Python subprocess module.
  3958. Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
  3959. on 0.2.5.5-alpha.
  3960. o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
  3961. - Work around a change in OpenSSL 1.1.1 where return values that
  3962. would previously indicate "no password" now indicate an empty
  3963. password. Without this workaround, Tor instances running with
  3964. OpenSSL 1.1.1 would accept descriptors that other Tor instances
  3965. would reject. Fixes bug 26116; bugfix on 0.2.5.16.
  3966. o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
  3967. - Fix a compilation warning on some versions of GCC when building
  3968. code that calls routerinfo_get_my_routerinfo() twice, assuming
  3969. that the second call will succeed if the first one did. Fixes bug
  3970. 26269; bugfix on 0.2.8.2-alpha.
  3971. o Minor bugfixes (client, backport from 0.3.4.1-alpha):
  3972. - Don't consider Tor running as a client if the ControlPort is open,
  3973. but no actual client ports are open. Fixes bug 26062; bugfix
  3974. on 0.2.9.4-alpha.
  3975. o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
  3976. - Prevent a possible out-of-bounds smartlist read in
  3977. protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
  3978. o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha):
  3979. - Fix a very unlikely (impossible, we believe) null pointer
  3980. dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
  3981. Coverity; this is CID 1430932.
  3982. o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
  3983. - Fix a number of small memory leaks identified by coverity. Fixes
  3984. bug 26467; bugfix on numerous Tor versions.
  3985. o Code simplification and refactoring (backport from 0.3.3.5-rc):
  3986. - Move the list of default directory authorities to its own file.
  3987. Closes ticket 24854. Patch by "beastr0".
  3988. Changes in version 0.3.4.4-rc - 2018-07-09
  3989. Tor 0.3.4.4-rc fixes several small compilation, portability, and
  3990. correctness issues in previous versions of Tor. This version is a
  3991. release candidate: if no serious bugs are found, we expect that the
  3992. stable 0.3.4 release will be (almost) the same as this release.
  3993. o Minor features (compilation):
  3994. - When building Tor, prefer to use Python 3 over Python 2, and more
  3995. recent (contemplated) versions over older ones. Closes
  3996. ticket 26372.
  3997. o Minor features (geoip):
  3998. - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
  3999. Country database. Closes ticket 26674.
  4000. o Minor features (Rust, portability):
  4001. - Rust cross-compilation is now supported. Closes ticket 25895.
  4002. o Minor bugfixes (compilation):
  4003. - Fix a compilation warning on some versions of GCC when building
  4004. code that calls routerinfo_get_my_routerinfo() twice, assuming
  4005. that the second call will succeed if the first one did. Fixes bug
  4006. 26269; bugfix on 0.2.8.2-alpha.
  4007. o Minor bugfixes (control port):
  4008. - Report the port correctly when a port is configured to bind to
  4009. "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha.
  4010. - Handle the HSADDRESS= argument to the HSPOST command properly.
  4011. (Previously, this argument was misparsed and thus ignored.) Fixes
  4012. bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".
  4013. o Minor bugfixes (correctness, flow control):
  4014. - Upon receiving a stream-level SENDME cell, verify that our window
  4015. has not grown too large. Fixes bug 26214; bugfix on svn
  4016. r54 (pre-0.0.1).
  4017. o Minor bugfixes (memory, correctness):
  4018. - Fix a number of small memory leaks identified by coverity. Fixes
  4019. bug 26467; bugfix on numerous Tor versions.
  4020. o Minor bugfixes (testing, compatibility):
  4021. - When running the hs_ntor_ref.py test, make sure only to pass
  4022. strings (rather than "bytes" objects) to the Python subprocess
  4023. module. Python 3 on Windows seems to require this. Fixes bug
  4024. 26535; bugfix on 0.3.1.1-alpha.
  4025. - When running the ntor_ref.py test, make sure only to pass strings
  4026. (rather than "bytes" objects) to the Python subprocess module.
  4027. Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
  4028. on 0.2.5.5-alpha.
  4029. Changes in version 0.3.3.8 - 2018-07-09
  4030. Tor 0.3.3.8 backports several changes from the 0.3.4.x series, including
  4031. fixes for a memory leak affecting directory authorities.
  4032. o Major bugfixes (directory authority, backport from 0.3.4.3-alpha):
  4033. - Stop leaking memory on directory authorities when planning to
  4034. vote. This bug was crashing authorities by exhausting their
  4035. memory. Fixes bug 26435; bugfix on 0.3.3.6.
  4036. o Major bugfixes (rust, testing, backport from 0.3.4.3-alpha):
  4037. - Make sure that failing tests in Rust will actually cause the build
  4038. to fail: previously, they were ignored. Fixes bug 26258; bugfix
  4039. on 0.3.3.4-alpha.
  4040. o Minor features (compilation, backport from 0.3.4.4-rc):
  4041. - When building Tor, prefer to use Python 3 over Python 2, and more
  4042. recent (contemplated) versions over older ones. Closes
  4043. ticket 26372.
  4044. o Minor features (geoip):
  4045. - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
  4046. Country database. Closes ticket 26674.
  4047. o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha):
  4048. - Add several checks to detect whether Tor relays are uploading
  4049. their descriptors without specifying why they regenerated them.
  4050. Diagnostic for ticket 25686.
  4051. o Minor bugfixes (circuit path selection, backport from 0.3.4.1-alpha):
  4052. - Don't count path selection failures as circuit build failures.
  4053. This change should eliminate cases where Tor blames its guard or
  4054. the network for situations like insufficient microdescriptors
  4055. and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
  4056. on 0.3.3.1-alpha.
  4057. o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
  4058. - Fix a compilation warning on some versions of GCC when building
  4059. code that calls routerinfo_get_my_routerinfo() twice, assuming
  4060. that the second call will succeed if the first one did. Fixes bug
  4061. 26269; bugfix on 0.2.8.2-alpha.
  4062. o Minor bugfixes (control port, backport from 0.3.4.4-rc):
  4063. - Handle the HSADDRESS= argument to the HSPOST command properly.
  4064. (Previously, this argument was misparsed and thus ignored.) Fixes
  4065. bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".
  4066. o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
  4067. - Fix a number of small memory leaks identified by coverity. Fixes
  4068. bug 26467; bugfix on numerous Tor versions.
  4069. o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
  4070. - Relays now correctly block attempts to re-extend to the previous
  4071. relay by Ed25519 identity. Previously they would warn in this
  4072. case, but not actually reject the attempt. Fixes bug 26158; bugfix
  4073. on 0.3.0.1-alpha.
  4074. o Minor bugfixes (restart-in-process, backport from 0.3.4.1-alpha):
  4075. - When shutting down, Tor now clears all the flags in the control.c
  4076. module. This should prevent a bug where authentication cookies are
  4077. not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.
  4078. o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
  4079. - When running the hs_ntor_ref.py test, make sure only to pass
  4080. strings (rather than "bytes" objects) to the Python subprocess
  4081. module. Python 3 on Windows seems to require this. Fixes bug
  4082. 26535; bugfix on 0.3.1.1-alpha.
  4083. - When running the ntor_ref.py test, make sure only to pass strings
  4084. (rather than "bytes" objects) to the Python subprocess module.
  4085. Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
  4086. on 0.2.5.5-alpha.
  4087. Changes in version 0.3.4.3-alpha - 2018-06-26
  4088. Tor 0.3.4.3-alpha fixes several bugs in earlier versions, including
  4089. one that was causing stability issues on directory authorities.
  4090. o Major bugfixes (directory authority):
  4091. - Stop leaking memory on directory authorities when planning to
  4092. vote. This bug was crashing authorities by exhausting their
  4093. memory. Fixes bug 26435; bugfix on 0.3.3.6.
  4094. o Major bugfixes (rust, testing):
  4095. - Make sure that failing tests in Rust will actually cause the build
  4096. to fail: previously, they were ignored. Fixes bug 26258; bugfix
  4097. on 0.3.3.4-alpha.
  4098. o Minor feature (directory authorities):
  4099. - Stop warning about incomplete bw lines before the first complete
  4100. bw line has been found, so that additional header lines can be
  4101. ignored. Fixes bug 25960; bugfix on 0.2.2.1-alpha
  4102. o Minor features (relay, diagnostic):
  4103. - Add several checks to detect whether Tor relays are uploading
  4104. their descriptors without specifying why they regenerated them.
  4105. Diagnostic for ticket 25686.
  4106. o Minor features (unit tests):
  4107. - Test complete bandwidth measurements files, and test that
  4108. incomplete bandwidth lines only give warnings when the end of the
  4109. header has not been detected. Fixes bug 25947; bugfix
  4110. on 0.2.2.1-alpha
  4111. o Minor bugfixes (compilation):
  4112. - Refrain from compiling unit testing related object files when
  4113. --disable-unittests is set to configure script. Fixes bug 24891;
  4114. bugfix on 0.2.5.1-alpha.
  4115. - When linking the libtor_testing.a library, only include the
  4116. dirauth object files once. Previously, they were getting added
  4117. twice. Fixes bug 26402; bugfix on 0.3.4.1-alpha.
  4118. - The --enable-fatal-warnings flag now affects Rust code as well.
  4119. Closes ticket 26245.
  4120. o Minor bugfixes (onion services):
  4121. - Recompute some consensus information after detecting a clock jump,
  4122. or after transitioning from a non-live consensus to a live
  4123. consensus. We do this to avoid having an outdated state, and
  4124. miscalculating the index for next-generation onion services. Fixes
  4125. bug 24977; bugfix on 0.3.2.1-alpha.
  4126. o Minor bugfixes (relay):
  4127. - Relays now correctly block attempts to re-extend to the previous
  4128. relay by Ed25519 identity. Previously they would warn in this
  4129. case, but not actually reject the attempt. Fixes bug 26158; bugfix
  4130. on 0.3.0.1-alpha.
  4131. o Minor bugfixes (testing):
  4132. - Fix compilation of the doctests in the Rust crypto crate. Fixes
  4133. bug 26415; bugfix on 0.3.4.1-alpha.
  4134. - Instead of trying to read the geoip configuration files from
  4135. within the unit tests, instead create our own ersatz files with
  4136. just enough geoip data in the format we expect. Trying to read
  4137. from the source directory created problems on Windows with mingw,
  4138. where the build system's paths are not the same as the platform's
  4139. paths. Fixes bug 25787; bugfix on 0.3.4.1-alpha.
  4140. - Refrain from trying to get an item from an empty smartlist in
  4141. test_bridges_clear_bridge_list. Set DEBUG_SMARTLIST in unit tests
  4142. to catch improper smartlist usage. Furthermore, enable
  4143. DEBUG_SMARTLIST globally when build is configured with fragile
  4144. hardening. Fixes bug 26196; bugfix on 0.3.4.1-alpha.
  4145. Changes in version 0.3.3.7 - 2018-06-12
  4146. Tor 0.3.3.7 backports several changes from the 0.3.4.x series, including
  4147. fixes for bugs affecting compatibility and stability.
  4148. o Directory authority changes:
  4149. - Add an IPv6 address for the "dannenberg" directory authority.
  4150. Closes ticket 26343.
  4151. o Minor features (geoip):
  4152. - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
  4153. Country database. Closes ticket 26351.
  4154. o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
  4155. - Work around a change in OpenSSL 1.1.1 where return values that
  4156. would previously indicate "no password" now indicate an empty
  4157. password. Without this workaround, Tor instances running with
  4158. OpenSSL 1.1.1 would accept descriptors that other Tor instances
  4159. would reject. Fixes bug 26116; bugfix on 0.2.5.16.
  4160. o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
  4161. - Silence unused-const-variable warnings in zstd.h with some GCC
  4162. versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
  4163. o Minor bugfixes (controller, backport from 0.3.4.2-alpha):
  4164. - Improve accuracy of the BUILDTIMEOUT_SET control port event's
  4165. TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
  4166. miscounting the total number of circuits for these field values.)
  4167. Fixes bug 26121; bugfix on 0.3.3.1-alpha.
  4168. o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
  4169. - Prevent a possible out-of-bounds smartlist read in
  4170. protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
  4171. o Minor bugfixes (path selection, backport from 0.3.4.1-alpha):
  4172. - Only select relays when they have the descriptors we prefer to use
  4173. for them. This change fixes a bug where we could select a relay
  4174. because it had _some_ descriptor, but reject it later with a
  4175. nonfatal assertion error because it didn't have the exact one we
  4176. wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.
  4177. Changes in version 0.3.4.2-alpha - 2018-06-12
  4178. Tor 0.3.4.2-alpha fixes several minor bugs in the previous alpha
  4179. release, and forward-ports an authority-only security fix from 0.3.3.6.
  4180. o Directory authority changes:
  4181. - Add an IPv6 address for the "dannenberg" directory authority.
  4182. Closes ticket 26343.
  4183. o Major bugfixes (security, directory authority, denial-of-service, also in 0.3.3.6):
  4184. - Fix a bug that could have allowed an attacker to force a directory
  4185. authority to use up all its RAM by passing it a maliciously
  4186. crafted protocol versions string. Fixes bug 25517; bugfix on
  4187. 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.
  4188. o Minor features (continuous integration):
  4189. - Add the necessary configuration files for continuous integration
  4190. testing on Windows, via the Appveyor platform. Closes ticket
  4191. 25549. Patches from Marcin Cieślak and Isis Lovecruft.
  4192. o Minor features (geoip):
  4193. - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
  4194. Country database. Closes ticket 26351.
  4195. o Minor bugfixes (compatibility, openssl):
  4196. - Work around a change in OpenSSL 1.1.1 where return values that
  4197. would previously indicate "no password" now indicate an empty
  4198. password. Without this workaround, Tor instances running with
  4199. OpenSSL 1.1.1 would accept descriptors that other Tor instances
  4200. would reject. Fixes bug 26116; bugfix on 0.2.5.16.
  4201. o Minor bugfixes (compilation):
  4202. - Silence unused-const-variable warnings in zstd.h with some GCC
  4203. versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
  4204. - Fix compilation when using OpenSSL 1.1.0 with the "no-deprecated"
  4205. flag enabled. Fixes bug 26156; bugfix on 0.3.4.1-alpha.
  4206. - Avoid a compiler warning when casting the return value of
  4207. smartlist_len() to double with DEBUG_SMARTLIST enabled. Fixes bug
  4208. 26283; bugfix on 0.2.4.10-alpha.
  4209. o Minor bugfixes (control port):
  4210. - Do not count 0-length RELAY_COMMAND_DATA cells as valid data in
  4211. CIRC_BW events. Previously, such cells were counted entirely in
  4212. the OVERHEAD field. Now they are not. Fixes bug 26259; bugfix
  4213. on 0.3.4.1-alpha.
  4214. o Minor bugfixes (controller):
  4215. - Improve accuracy of the BUILDTIMEOUT_SET control port event's
  4216. TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
  4217. miscounting the total number of circuits for these field values.)
  4218. Fixes bug 26121; bugfix on 0.3.3.1-alpha.
  4219. o Minor bugfixes (hardening):
  4220. - Prevent a possible out-of-bounds smartlist read in
  4221. protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
  4222. o Minor bugfixes (onion services):
  4223. - Fix a bug that blocked the creation of ephemeral v3 onion
  4224. services. Fixes bug 25939; bugfix on 0.3.4.1-alpha.
  4225. o Minor bugfixes (test coverage tools):
  4226. - Update our "cov-diff" script to handle output from the latest
  4227. version of gcov, and to remove extraneous timestamp information
  4228. from its output. Fixes bugs 26101 and 26102; bugfix
  4229. on 0.2.5.1-alpha.
  4230. Changes in version 0.3.3.6 - 2018-05-22
  4231. Tor 0.3.3.6 is the first stable release in the 0.3.3 series. It
  4232. backports several important fixes from the 0.3.4.1-alpha.
  4233. The Tor 0.3.3 series includes controller support and other
  4234. improvements for v3 onion services, official support for embedding Tor
  4235. within other applications, and our first non-trivial module written in
  4236. the Rust programming language. (Rust is still not enabled by default
  4237. when building Tor.) And as usual, there are numerous other smaller
  4238. bugfixes, features, and improvements.
  4239. Below are the changes since 0.3.3.5-rc. For a list of all changes
  4240. since 0.3.2.10, see the ReleaseNotes file.
  4241. o Major bugfixes (directory authorities, security, backport from 0.3.4.1-alpha):
  4242. - When directory authorities read a zero-byte bandwidth file, they
  4243. would previously log a warning with the contents of an
  4244. uninitialised buffer. They now log a warning about the empty file
  4245. instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
  4246. o Major bugfixes (security, directory authority, denial-of-service):
  4247. - Fix a bug that could have allowed an attacker to force a directory
  4248. authority to use up all its RAM by passing it a maliciously
  4249. crafted protocol versions string. Fixes bug 25517; bugfix on
  4250. 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.
  4251. o Major bugfixes (crash, backport from 0.3.4.1-alpha):
  4252. - Avoid a rare assertion failure in the circuit build timeout code
  4253. if we fail to allow any circuits to actually complete. Fixes bug
  4254. 25733; bugfix on 0.2.2.2-alpha.
  4255. o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
  4256. - Avoid a crash when testing router reachability on a router that
  4257. could have an ed25519 ID, but which does not. Fixes bug 25415;
  4258. bugfix on 0.3.3.2-alpha.
  4259. o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
  4260. - Correctly detect when onion services get disabled after HUP. Fixes
  4261. bug 25761; bugfix on 0.3.2.1.
  4262. o Major bugfixes (relay, denial of service, backport from 0.3.4.1-alpha):
  4263. - Impose a limit on circuit cell queue size. The limit can be
  4264. controlled by a consensus parameter. Fixes bug 25226; bugfix
  4265. on 0.2.4.14-alpha.
  4266. o Minor features (compatibility, backport from 0.3.4.1-alpha):
  4267. - Avoid some compilation warnings with recent versions of LibreSSL.
  4268. Closes ticket 26006.
  4269. o Minor features (continuous integration, backport from 0.3.4.1-alpha):
  4270. - Our .travis.yml configuration now includes support for testing the
  4271. results of "make distcheck". (It's not uncommon for "make check"
  4272. to pass but "make distcheck" to fail.) Closes ticket 25814.
  4273. - Our Travis CI configuration now integrates with the Coveralls
  4274. coverage analysis tool. Closes ticket 25818.
  4275. o Minor features (geoip):
  4276. - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
  4277. database. Closes ticket 26104.
  4278. o Minor bugfixes (client, backport from 0.3.4.1-alpha):
  4279. - Don't consider Tor running as a client if the ControlPort is open,
  4280. but no actual client ports are open. Fixes bug 26062; bugfix
  4281. on 0.2.9.4-alpha.
  4282. o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
  4283. - Upon receiving a malformed connected cell, stop processing the
  4284. cell immediately. Previously we would mark the connection for
  4285. close, but continue processing the cell as if the connection were
  4286. open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
  4287. o Minor bugfixes (documentation, backport from 0.3.4.1-alpha):
  4288. - Stop saying in the manual that clients cache ipv4 dns answers from
  4289. exit relays. We haven't used them since 0.2.6.3-alpha, and in
  4290. ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
  4291. we forgot to say so in the man page. Fixes bug 26052; bugfix
  4292. on 0.3.2.6-alpha.
  4293. o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
  4294. - Allow the nanosleep() system call, which glibc uses to implement
  4295. sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
  4296. o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
  4297. - Fix a memory leak when a v3 onion service is configured and gets a
  4298. SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
  4299. - When parsing the descriptor signature, look for the token plus an
  4300. extra white-space at the end. This is more correct but also will
  4301. allow us to support new fields that might start with "signature".
  4302. Fixes bug 26069; bugfix on 0.3.0.1-alpha.
  4303. o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
  4304. - Avoid a crash when running with DirPort set but ORPort turned off.
  4305. Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
  4306. o Documentation (backport from 0.3.4.1-alpha):
  4307. - Correct an IPv6 error in the documentation for ExitPolicy. Closes
  4308. ticket 25857. Patch from "CTassisF".
  4309. Changes in version 0.3.4.1-alpha - 2018-05-17
  4310. Tor 0.3.4.1-alpha is the first release in the 0.3.4.x series. It
  4311. includes refactoring to begin reducing Tor's binary size and idle CPU
  4312. usage on mobile, along with prep work for new bandwidth scanners,
  4313. improvements to the experimental "vanguards" feature, and numerous
  4314. other small features and bugfixes.
  4315. o New system requirements:
  4316. - Tor no longer tries to support old operating systems without
  4317. mmap() or some local equivalent. Apparently, compilation on such
  4318. systems has been broken for some time, without anybody noticing or
  4319. complaining. Closes ticket 25398.
  4320. o Major feature (directory authority, modularization):
  4321. - The directory authority subsystem has been modularized. The code
  4322. is now located in src/or/dirauth/, and is compiled in by default.
  4323. To disable the module, the configure option
  4324. --disable-module-dirauth has been added. This module may be
  4325. disabled by default in some future release. Closes ticket 25610.
  4326. o Major features (main loop, CPU usage):
  4327. - When Tor is disabled (via DisableNetwork or via hibernation), it
  4328. no longer needs to run any per-second events. This change should
  4329. make it easier for mobile applications to disable Tor while the
  4330. device is sleeping, or Tor is not running. Closes ticket 26063.
  4331. - Tor no longer enables all of its periodic events by default.
  4332. Previously, Tor would enable all possible main loop events,
  4333. regardless of whether it needed them. Furthermore, many of these
  4334. events are now disabled with Tor is hibernating or DisableNetwork
  4335. is set. This is a big step towards reducing client CPU usage by
  4336. reducing the amount of wake-ups the daemon does. Closes ticket
  4337. 25376 and 25762.
  4338. - The bandwidth-limitation logic has been refactored so that
  4339. bandwidth calculations are performed on-demand, rather than every
  4340. TokenBucketRefillInterval milliseconds. This change should improve
  4341. the granularity of our bandwidth calculations, and limit the
  4342. number of times that the Tor process needs to wake up when it is
  4343. idle. Closes ticket 25373.
  4344. - Move responsibility for many operations from a once-per-second
  4345. callback to a callback that is only scheduled as needed. Moving
  4346. this functionality has allowed us to disable the callback when
  4347. Tor's network is disabled. Once enough items are removed from our
  4348. once-per-second callback, we can eliminate it entirely to conserve
  4349. CPU when idle. The functionality removed includes: closing
  4350. connections, circuits, and channels (ticket 25932); consensus
  4351. voting (25937); flushing log callbacks (25951); honoring delayed
  4352. SIGNEWNYM requests (25949); rescanning the consensus cache
  4353. (25931); saving the state file to disk (25948); warning relay
  4354. operators about unreachable ports (25952); and keeping track of
  4355. Tor's uptime (26009).
  4356. o Major bugfixes (directory authorities, security):
  4357. - When directory authorities read a zero-byte bandwidth file, they
  4358. would previously log a warning with the contents of an
  4359. uninitialised buffer. They now log a warning about the empty file
  4360. instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
  4361. o Major bugfixes (crash):
  4362. - Avoid a rare assertion failure in the circuit build timeout code
  4363. if we fail to allow any circuits to actually complete. Fixes bug
  4364. 25733; bugfix on 0.2.2.2-alpha.
  4365. o Major bugfixes (directory authority):
  4366. - Avoid a crash when testing router reachability on a router that
  4367. could have an ed25519 ID, but which does not. Fixes bug 25415;
  4368. bugfix on 0.3.3.2-alpha.
  4369. o Major bugfixes (onion service):
  4370. - Correctly detect when onion services get disabled after HUP. Fixes
  4371. bug 25761; bugfix on 0.3.2.1.
  4372. o Major bugfixes (protover, voting):
  4373. - Revise Rust implementation of protover to use a more memory-
  4374. efficient voting algorithm and corresponding data structures, thus
  4375. avoiding a potential (but small impact) DoS attack where specially
  4376. crafted protocol strings would expand to several potential
  4377. megabytes in memory. In the process, several portions of code were
  4378. revised to be methods on new, custom types, rather than functions
  4379. taking interchangeable types, thus increasing type safety of the
  4380. module. Custom error types and handling were added as well, in
  4381. order to facilitate better error dismissal/handling in outside
  4382. crates and avoid mistakenly passing an internal error string to C
  4383. over the FFI boundary. Many tests were added, and some previous
  4384. differences between the C and Rust implementations have been
  4385. remedied. Fixes bug 24031; bugfix on 0.3.3.1-alpha.
  4386. o Major bugfixes (relay, denial of service):
  4387. - Impose a limit on circuit cell queue size. The limit can be
  4388. controlled by a consensus parameter. Fixes bug 25226; bugfix
  4389. on 0.2.4.14-alpha.
  4390. o Minor features (accounting):
  4391. - When Tor becomes dormant, it now uses a scheduled event to wake up
  4392. at the right time. Previously, we would use the per-second timer
  4393. to check whether to wake up, but we no longer have any per-second
  4394. timers enabled when the network is disabled. Closes ticket 26064.
  4395. o Minor features (code quality):
  4396. - Add optional spell-checking for the Tor codebase, using the
  4397. "misspell" program. To use this feature, run "make check-typos".
  4398. Closes ticket 25024.
  4399. o Minor features (compatibility):
  4400. - Tor now detects versions of OpenSSL 1.1.0 and later compiled with
  4401. the no-deprecated option, and builds correctly with them. Closes
  4402. tickets 19429, 19981, and 25353.
  4403. - Avoid some compilation warnings with recent versions of LibreSSL.
  4404. Closes ticket 26006.
  4405. o Minor features (compression, zstd):
  4406. - When running with zstd, Tor now considers using advanced functions
  4407. that the zstd maintainers have labeled as potentially unstable. To
  4408. prevent breakage, Tor will only use this functionality when the
  4409. runtime version of the zstd library matches the version with which
  4410. Tor was compiled. Closes ticket 25162.
  4411. o Minor features (configuration):
  4412. - The "DownloadSchedule" options have been renamed to end with
  4413. "DownloadInitialDelay". The old names are still allowed, but will
  4414. produce a warning. Comma-separated lists are still permitted for
  4415. these options, but all values after the first are ignored (as they
  4416. have been since 0.2.9). Closes ticket 23354.
  4417. o Minor features (continuous integration):
  4418. - Our .travis.yml configuration now includes support for testing the
  4419. results of "make distcheck". (It's not uncommon for "make check"
  4420. to pass but "make distcheck" to fail.) Closes ticket 25814.
  4421. - Our Travis CI configuration now integrates with the Coveralls
  4422. coverage analysis tool. Closes ticket 25818.
  4423. o Minor features (control port):
  4424. - Introduce GETINFO "current-time/{local,utc}" to return the local
  4425. and UTC times respectively in ISO format. This helps a controller
  4426. like Tor Browser detect a time-related error. Closes ticket 25511.
  4427. Patch by Neel Chauhan.
  4428. - Introduce new fields to the CIRC_BW event. There are two new
  4429. fields in each of the read and written directions. The DELIVERED
  4430. fields report the total valid data on the circuit, as measured by
  4431. the payload sizes of verified and error-checked relay command
  4432. cells. The OVERHEAD fields report the total unused bytes in each
  4433. of these cells. Closes ticket 25903.
  4434. o Minor features (directory authority):
  4435. - Directory authorities now open their key-pinning files as O_SYNC,
  4436. to limit their chances of accidentally writing partial lines.
  4437. Closes ticket 23909.
  4438. o Minor features (directory authority, forward compatibility):
  4439. - Make the lines of the measured bandwidth file able to contain
  4440. their entries in any order. Previously, the node_id entry needed
  4441. to come first. Closes ticket 26004.
  4442. o Minor features (entry guards):
  4443. - Introduce a new torrc option NumPrimaryGuards for controlling the
  4444. number of primary guards. Closes ticket 25843.
  4445. o Minor features (geoip):
  4446. - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
  4447. database. Closes ticket 26104.
  4448. o Minor features (performance):
  4449. - Avoid a needless call to malloc() when processing an incoming
  4450. relay cell. Closes ticket 24914.
  4451. - Make our timing-wheel code run a tiny bit faster on 32-bit
  4452. platforms, by preferring 32-bit math to 64-bit. Closes
  4453. ticket 24688.
  4454. - Avoid a needless malloc()/free() pair every time we handle an ntor
  4455. handshake. Closes ticket 25150.
  4456. o Minor features (testing):
  4457. - Add a unit test for voting_schedule_get_start_of_next_interval().
  4458. Closes ticket 26014, and helps make unit test coverage
  4459. more deterministic.
  4460. - A new unittests module specifically for testing the functions in
  4461. the (new-ish) bridges.c module has been created with new
  4462. unittests, raising the code coverage percentages. Closes 25425.
  4463. - We now have improved testing for addressmap_get_virtual_address()
  4464. function. This should improve our test coverage, and make our test
  4465. coverage more deterministic. Closes ticket 25993.
  4466. o Minor features (timekeeping, circuit scheduling):
  4467. - When keeping track of how busy each circuit have been recently on
  4468. a given connection, use coarse-grained monotonic timers rather
  4469. than gettimeofday(). This change should marginally increase
  4470. accuracy and performance. Implements part of ticket 25927.
  4471. o Minor bugfixes (bandwidth management):
  4472. - Consider ourselves "low on write bandwidth" if we have exhausted
  4473. our write bandwidth some time in the last second. This was the
  4474. documented behavior before, but the actual behavior was to change
  4475. this value every TokenBucketRefillInterval. Fixes bug 25828;
  4476. bugfix on 0.2.3.5-alpha.
  4477. o Minor bugfixes (C correctness):
  4478. - Add a missing lock acquisition in the shutdown code of the control
  4479. subsystem. Fixes bug 25675; bugfix on 0.2.7.3-rc. Found by
  4480. Coverity; this is CID 1433643.
  4481. o Minor bugfixes (circuit path selection):
  4482. - Don't count path selection failures as circuit build failures.
  4483. This change should eliminate cases where Tor blames its guard or
  4484. the network for situations like insufficient microdescriptors
  4485. and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
  4486. on 0.3.3.1-alpha.
  4487. o Minor bugfixes (client):
  4488. - Don't consider Tor running as a client if the ControlPort is open,
  4489. but no actual client ports are open. Fixes bug 26062; bugfix
  4490. on 0.2.9.4-alpha.
  4491. o Minor bugfixes (code style):
  4492. - Fixed multiple includes of transports.h in src/or/connection.c
  4493. Fixes bug 25261; bugfix on 0.2.5.1-alpha.
  4494. - Remove the unused variable n_possible from the function
  4495. channel_get_for_extend(). Fixes bug 25645; bugfix on 0.2.4.4-alpha
  4496. o Minor bugfixes (control interface):
  4497. - Respond with more human-readable error messages to GETINFO exit-
  4498. policy/* requests. Also, let controller know if an error is
  4499. transient (response code 551) or not (response code 552). Fixes
  4500. bug 25852; bugfix on 0.2.8.1-alpha.
  4501. o Minor bugfixes (controller):
  4502. - Make CIRC_BW event reflect the total of all data sent on a
  4503. circuit, including padding and dropped cells. Also fix a mis-
  4504. counting bug when STREAM_BW events were enabled. Fixes bug 25400;
  4505. bugfix on 0.2.5.2-alpha.
  4506. o Minor bugfixes (correctness, client):
  4507. - Upon receiving a malformed connected cell, stop processing the cell
  4508. immediately. Previously we would mark the connection for close, but
  4509. continue processing the cell as if the connection were open. Fixes bug
  4510. 26072; bugfix on 0.2.4.7-alpha.
  4511. o Minor bugfixes (directory client):
  4512. - When unverified-consensus is verified, rename it to cached-
  4513. consenus. Fixes bug 4187; bugfix on 0.2.0.3-alpha.
  4514. - Fixed launching a certificate fetch always during the scheduled
  4515. periodic consensus fetch by fetching only in those cases when
  4516. consensus are waiting for certs. Fixes bug 24740; bugfix
  4517. on 0.2.9.1-alpha.
  4518. o Minor bugfixes (documentation):
  4519. - Stop saying in the manual that clients cache ipv4 dns answers from
  4520. exit relays. We haven't used them since 0.2.6.3-alpha, and in
  4521. ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
  4522. we forgot to say so in the man page. Fixes bug 26052; bugfix
  4523. on 0.3.2.6-alpha.
  4524. o Minor bugfixes (error reporting):
  4525. - Improve tolerance for directory authorities with skewed clocks.
  4526. Previously, an authority with a clock more than 60 seconds ahead
  4527. could cause a client with a correct clock to warn that the
  4528. client's clock was behind. Now the clocks of a majority of
  4529. directory authorities have to be ahead of the client before this
  4530. warning will occur. Fixes bug 25756; bugfix on 0.2.2.25-alpha.
  4531. o Minor bugfixes (Linux seccomp2 sandbox):
  4532. - Allow the nanosleep() system call, which glibc uses to implement
  4533. sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
  4534. o Minor bugfixes (onion service):
  4535. - Fix a memory leak when a v3 onion service is configured and gets a
  4536. SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
  4537. - When parsing the descriptor signature, look for the token plus an
  4538. extra white-space at the end. This is more correct but also will
  4539. allow us to support new fields that might start with "signature".
  4540. Fixes bug 26069; bugfix on 0.3.0.1-alpha.
  4541. o Minor bugfixes (path selection):
  4542. - Only select relays when they have the descriptors we prefer to use
  4543. for them. This change fixes a bug where we could select a relay
  4544. because it had _some_ descriptor, but reject it later with a
  4545. nonfatal assertion error because it didn't have the exact one we
  4546. wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.
  4547. o Minor bugfixes (portability):
  4548. - Do not align mmap length, as it is not required by POSIX, and the
  4549. getpagesize function is deprecated. Fixes bug 25399; bugfix
  4550. on 0.1.1.23.
  4551. o Minor bugfixes (portability, FreeBSD):
  4552. - In have_enough_mem_for_dircache(), the variable DIRCACHE_MIN_MEM_MB
  4553. does not stringify on FreeBSD, so we switch to tor_asprintf().
  4554. Fixes bug 20887; bugfix on 0.2.8.1-alpha. Patch by Neel Chauhan.
  4555. o Minor bugfixes (relay statistics):
  4556. - When a relay is collecting internal statistics about how many
  4557. create cell requests it has seen of each type, accurately count
  4558. the requests from relays that temporarily fall out of the
  4559. consensus. (To be extra conservative, we were already ignoring
  4560. requests from clients in our counts, and we continue ignoring them
  4561. here.) Fixes bug 24910; bugfix on 0.2.4.17-rc.
  4562. o Minor bugfixes (relay, crash):
  4563. - Avoid a crash when running with DirPort set but ORPort turned off.
  4564. Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
  4565. o Minor bugfixes (restart-in-process):
  4566. - When shutting down, Tor now clears all the flags in the control.c
  4567. module. This should prevent a bug where authentication cookies are
  4568. not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.
  4569. o Minor bugfixes (testing):
  4570. - When testing workqueue event-cancellation, make sure that we
  4571. actually cancel an event, and that cancel each event with equal
  4572. probability. (It was previously possible, though extremely
  4573. unlikely, for our event-canceling test not to cancel any events.)
  4574. Fixes bug 26008; bugfix on 0.2.6.3-alpha.
  4575. - Repeat part of the test in test_client_pick_intro() a number of
  4576. times, to give it consistent coverage. Fixes bug 25996; bugfix
  4577. on 0.3.2.1-alpha.
  4578. - Remove randomness from the hs_common/responsible_hsdirs test, so
  4579. that it always takes the same path through the function it tests.
  4580. Fixes bug 25997; bugfix on 0.3.2.1-alpha.
  4581. - Change the behavior of the "channel/outbound" test so that it
  4582. never causes a 10-second rollover for the EWMA circuitmux code.
  4583. Previously, this behavior would happen randomly, and result in
  4584. fluctuating test coverage. Fixes bug 25994; bugfix
  4585. on 0.3.3.1-alpha.
  4586. - Use X509_new() to allocate certificates that will be freed later
  4587. with X509_free(). Previously, some parts of the unit tests had
  4588. used tor_malloc_zero(), which is incorrect, and which caused test
  4589. failures on Windows when they were built with extra hardening.
  4590. Fixes bugs 25943 and 25944; bugfix on 0.2.8.1-alpha. Patch by
  4591. Marcin Cieślak.
  4592. - While running the circuit_timeout test, fix the PRNG to a
  4593. deterministic AES stream, so that the test coverage from this test
  4594. will itself be deterministic. Fixes bug 25995; bugfix
  4595. on 0.2.2.2-alpha.
  4596. o Minor bugfixes (vanguards):
  4597. - Allow the last hop in a vanguard circuit to be the same as our
  4598. first, to prevent the adversary from influencing guard node choice
  4599. by choice of last hop. Also prevent the creation of A - B - A
  4600. paths, or A - A paths, which are forbidden by relays. Fixes bug
  4601. 25870; bugfix on 0.3.3.1-alpha.
  4602. o Code simplification and refactoring:
  4603. - Remove duplicate code in parse_{c,s}method_line and bootstrap
  4604. their functionalities into a single function. Fixes bug 6236;
  4605. bugfix on 0.2.3.6-alpha.
  4606. - We remove the PortForwarding and PortForwardingHelper options,
  4607. related functions, and the port_forwarding tests. These options
  4608. were used by the now-deprecated Vidalia to help ordinary users
  4609. become Tor relays or bridges. Closes ticket 25409. Patch by
  4610. Neel Chauhan.
  4611. - In order to make the OR and dir checking function in router.c less
  4612. confusing we renamed some functions and
  4613. consider_testing_reachability() has been split into
  4614. router_should_check_reachability() and
  4615. router_do_reachability_checks(). Also we improved the documentation
  4616. in some functions. Closes ticket 18918.
  4617. - Initial work to isolate Libevent usage to a handful of modules in
  4618. our codebase, to simplify our call structure, and so that we can
  4619. more easily change event loops in the future if needed. Closes
  4620. ticket 23750.
  4621. - Introduce a function to call getsockname() and return tor_addr_t,
  4622. to save a little complexity throughout the codebase. Closes
  4623. ticket 18105.
  4624. - Make hsdir_index in node_t a hsdir_index_t rather than a pointer
  4625. as hsdir_index is always present. Also, we move hsdir_index_t into
  4626. or.h. Closes ticket 23094. Patch by Neel Chauhan.
  4627. - Merge functions used for describing nodes and suppress the
  4628. functions that do not allocate memory for the output buffer
  4629. string. NODE_DESC_BUF_LEN constant and format_node_description()
  4630. function cannot be used externally from router.c module anymore.
  4631. Closes ticket 25432. Patch by valentecaio.
  4632. - Our main loop has been simplified so that all important operations
  4633. happen inside events. Previously, some operations had to happen
  4634. outside the event loop, to prevent infinite sequences of event
  4635. activations. Closes ticket 25374.
  4636. - Put a SHA1 public key digest in hs_service_intro_point_t, and use
  4637. it in register_intro_circ() and service_intro_point_new(). This
  4638. prevents the digest from being re-calculated each time. Closes
  4639. ticket 23107. Patch by Neel Chauhan.
  4640. - Refactor token-bucket implementations to use a common backend.
  4641. Closes ticket 25766.
  4642. - Remove extern declaration of stats_n_seconds_working variable from
  4643. main, protecting its accesses with get_uptime() and reset_uptime()
  4644. functions. Closes ticket 25081, patch by “valentecaio”.
  4645. - Remove our previous logic for "cached gettimeofday()" -- our
  4646. coarse monotonic timers are fast enough for this purpose, and far
  4647. less error-prone. Implements part of ticket 25927.
  4648. - Remove the return value for fascist_firewall_choose_address_base(),
  4649. and sister functions such as fascist_firewall_choose_address_node()
  4650. and fascist_firewall_choose_address_rs(). Also, while we're here,
  4651. initialize the ap argument as leaving it uninitialized can pose a
  4652. security hazard. Closes ticket 24734. Patch by Neel Chauhan.
  4653. - Rename two fields of connection_t struct. timestamp_lastwritten is
  4654. renamed to timestamp_last_write_allowed and timestamp_lastread is
  4655. renamed to timestamp_last_read_allowed. Closes ticket 24714, patch
  4656. by "valentecaio".
  4657. - Since Tor requires C99, remove our old workaround code for libc
  4658. implementations where free(NULL) doesn't work. Closes ticket 24484.
  4659. - Use our standard rate-limiting code to deal with excessive
  4660. libevent failures, rather than the hand-rolled logic we had
  4661. before. Closes ticket 26016.
  4662. - We remove the return value of node_get_prim_orport() and
  4663. node_get_prim_dirport(), and introduce node_get_prim_orport() in
  4664. node_ipv6_or_preferred() and node_ipv6_dir_preferred() in order to
  4665. check for a null address. Closes ticket 23873. Patch by
  4666. Neel Chauhan.
  4667. - We switch to should_record_bridge_info() in
  4668. geoip_note_client_seen() and options_need_geoip_info() instead of
  4669. accessing the configuration values directly. Fixes bug 25290;
  4670. bugfix on 0.2.1.6-alpha. Patch by Neel Chauhan.
  4671. o Deprecated features:
  4672. - As we are not recommending 0.2.5 anymore, we require relays that
  4673. once had an ed25519 key associated with their RSA key to always
  4674. have that key, instead of allowing them to drop back to a version
  4675. that didn't support ed25519. This means they need to use a new RSA
  4676. key if they want to downgrade to an older version of tor without
  4677. ed25519. Closes ticket 20522.
  4678. o Documentation:
  4679. - Correct an IPv6 error in the documentation for ExitPolicy. Closes
  4680. ticket 25857. Patch from "CTassisF".
  4681. o Removed features:
  4682. - Directory authorities will no longer support voting according to
  4683. any consensus method before consensus method 25. This keeps
  4684. authorities compatible with all authorities running 0.2.9.8 and
  4685. later, and does not break any clients or relays. Implements ticket
  4686. 24378 and proposal 290.
  4687. - The PortForwarding and PortForwardingHelper features have been
  4688. removed. The reasoning is, given that implementations of NAT
  4689. traversal protocols within common consumer grade routers are
  4690. frequently buggy, and that the target audience for a NAT punching
  4691. feature is a perhaps less-technically-inclined relay operator,
  4692. when the helper fails to setup traversal the problems are usually
  4693. deep, ugly, and very router specific, making them horrendously
  4694. impossible for technical support to reliable assist with, and thus
  4695. resulting in frustration all around. Unfortunately, relay
  4696. operators who would like to run relays behind NATs will need to
  4697. become more familiar with the port forwarding configurations on
  4698. their local router. Closes 25409.
  4699. - The TestingEnableTbEmptyEvent option has been removed. It was used
  4700. in testing simulations to measure how often connection buckets
  4701. were emptied, in order to improve our scheduling, but it has not
  4702. been actively used in years. Closes ticket 25760.
  4703. - The old "round-robin" circuit multiplexer (circuitmux)
  4704. implementation has been removed, along with a fairly large set of
  4705. code that existed to support it. It has not been the default
  4706. circuitmux since we introduced the "EWMA" circuitmux in 0.2.4.x,
  4707. but it still required an unreasonable amount of memory and CPU.
  4708. Closes ticket 25268.
  4709. Changes in version 0.3.3.5-rc - 2018-04-15
  4710. Tor 0.3.3.5-rc fixes various bugs in earlier versions of Tor,
  4711. including some that could affect reliability or correctness.
  4712. This is the first release candidate in the 0.3.3 series. If we find no
  4713. new bugs or regression here, then the first stable 0.3.3 release will
  4714. be nearly identical to this one.
  4715. o Major bugfixes (security, protover, voting):
  4716. - Revise Rust implementation of protover to use a more memory-
  4717. efficient voting algorithm and corresponding data structures, thus
  4718. avoiding a potential memory-based DoS attack where specially
  4719. crafted protocol strings would expand to fill available memory.
  4720. Fixes bug 24031; bugfix on 0.3.3.1-alpha.
  4721. o Major bugfixes (performance, load balancing):
  4722. - Directory authorities no longer vote in favor of the Guard flag
  4723. for relays without directory support. Starting in Tor
  4724. 0.3.0.1-alpha, clients have been avoiding using such relays in the
  4725. Guard position, leading to increasingly broken load balancing for
  4726. the 5%-or-so of Guards that don't advertise directory support.
  4727. Fixes bug 22310; bugfix on 0.3.0.6.
  4728. o Minor feature (continuous integration):
  4729. - Update the Travis CI configuration to use the stable Rust channel,
  4730. now that we have decided to require that. Closes ticket 25714.
  4731. o Minor features (config options):
  4732. - Change the way the default value for MaxMemInQueues is calculated.
  4733. We now use 40% of the hardware RAM if the system has 8 GB RAM or
  4734. more. Otherwise we use the former value of 75%. Closes
  4735. ticket 24782.
  4736. o Minor features (geoip):
  4737. - Update geoip and geoip6 to the April 3 2018 Maxmind GeoLite2
  4738. Country database. Closes ticket 25718.
  4739. o Minor bugfixes (client):
  4740. - When using a listed relay as a bridge, and also using
  4741. microdescriptors, and considering that relay as a non-bridge in a
  4742. circuit, treat its microdescriptor as a valid source of
  4743. information about that relay. This change should prevent a non-
  4744. fatal assertion error. Fixes bug 25691; bugfix on 0.3.3.4-alpha.
  4745. o Minor bugfixes (controller):
  4746. - Restore the correct operation of the RESOLVE command, which had
  4747. been broken since we added the ability to enable/disable DNS on
  4748. specific listener ports. Fixes bug 25617; bugfix on 0.2.9.3-alpha.
  4749. o Minor bugfixes (distribution, compilation, rust):
  4750. - Build correctly when the rust dependencies submodule is loaded,
  4751. but the TOR_RUST_DEPENDENCIES environment variable is not set.
  4752. Fixes bug 25679; bugfix on 0.3.3.1-alpha.
  4753. - Actually include all of our Rust source in our source
  4754. distributions. (Previously, a few of the files were accidentally
  4755. omitted.) Fixes bug 25732; bugfix on 0.3.3.2-alpha.
  4756. o Minor bugfixes (documentation):
  4757. - Document that the PerConnBW{Rate,Burst} options will fall back to
  4758. their corresponding consensus parameters only if those parameters
  4759. are set. Previously we had claimed that these values would always
  4760. be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.
  4761. - Revert a misformatting issue in the ExitPolicy documentation.
  4762. Fixes bug 25582; bugfix on 0.3.3.1-alpha.
  4763. o Minor bugfixes (exit relay DNS retries):
  4764. - Re-attempt timed-out DNS queries 3 times before failure, since our
  4765. timeout is 5 seconds for them, but clients wait 10-15. Also allow
  4766. slightly more timeouts per resolver when an exit has multiple
  4767. resolvers configured. Fixes bug 21394; bugfix on 0.3.1.9.
  4768. o Minor bugfixes (onion services):
  4769. - Re-instate counting the client HSDir fetch circuits against the
  4770. MaxClientCircuitsPending rate limit. Fixes bug 24989; bugfix
  4771. on 0.3.3.1-alpha.
  4772. - Remove underscores from the _HSLayer{2,3}Nodes options. This
  4773. expert-user configuration can now be enabled as HSLayer{2,3}Nodes.
  4774. Fixes bug 25581; bugfix on 0.3.3.1-alpha
  4775. o Code simplification and refactoring:
  4776. - Move the list of default directory authorities to its own file.
  4777. Closes ticket 24854. Patch by "beastr0".
  4778. o Documentation (manpage, denial of service):
  4779. - Provide more detail about the denial-of-service options, by
  4780. listing each mitigation and explaining how they relate. Closes
  4781. ticket 25248.
  4782. Changes in version 0.3.3.4-alpha - 2018-03-29
  4783. Tor 0.3.3.4-alpha includes various bugfixes for issues found during
  4784. the alpha testing of earlier releases in its series. We are
  4785. approaching a stable 0.3.3.4-alpha release: more testing is welcome!
  4786. o New system requirements:
  4787. - When built with Rust, Tor now depends on version 0.2.39 of the
  4788. libc crate. Closes tickets 25310 and 25664.
  4789. o Major bugfixes (relay, connection):
  4790. - If we have failed to connect to a relay and received a connection
  4791. refused, timeout, or similar error (at the TCP level), do not try
  4792. that same address/port again for 60 seconds after the failure has
  4793. occurred. Fixes bug 24767; bugfix on 0.0.6.
  4794. o Minor features (geoip):
  4795. - Update geoip and geoip6 to the March 8 2018 Maxmind GeoLite2
  4796. Country database. Closes ticket 25469.
  4797. o Minor features (log messages):
  4798. - Improve log message in the out-of-memory handler to include
  4799. information about memory usage from the different compression
  4800. backends. Closes ticket 25372.
  4801. o Minor features (sandbox):
  4802. - Explicitly permit the poll() system call when the Linux
  4803. seccomp2-based sandbox is enabled: apparently, some versions of
  4804. libc use poll() when calling getpwnam(). Closes ticket 25313.
  4805. o Minor bugfixes (C correctness):
  4806. - Fix a very unlikely (impossible, we believe) null pointer
  4807. dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
  4808. Coverity; this is CID 1430932.
  4809. o Minor bugfixes (channel, client):
  4810. - Better identify client connection when reporting to the geoip
  4811. client cache. Fixes bug 24904; bugfix on 0.3.1.7.
  4812. o Minor bugfixes (compilation):
  4813. - Fix a C99 compliance issue in our configuration script that caused
  4814. compilation issues when compiling Tor with certain versions of
  4815. xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.
  4816. o Minor bugfixes (controller, reliability):
  4817. - Avoid a (nonfatal) assertion failure when extending a one-hop
  4818. circuit from the controller to become a multihop circuit. Fixes
  4819. bug 24903; bugfix on 0.2.5.2-alpha.
  4820. o Major bugfixes (networking):
  4821. - Tor will no longer reject IPv6 address strings from Tor Browser
  4822. when they are passed as hostnames in SOCKS5 requests. Fixes bug
  4823. 25036, bugfix on Tor 0.3.1.2.
  4824. o Minor bugfixes (networking):
  4825. - string_is_valid_hostname() will not consider IP strings to be
  4826. valid hostnames. Fixes bug 25055; bugfix on Tor 0.2.5.5.
  4827. o Minor bugfixes (onion service v3):
  4828. - Avoid an assertion failure when the next onion service
  4829. descriptor rotation type is out of sync with the consensus's
  4830. valid-after time. Instead, log a warning message with extra
  4831. information, so we can better hunt down the cause of this
  4832. assertion. Fixes bug 25306; bugfix on 0.3.2.1-alpha.
  4833. o Minor bugfixes (testing):
  4834. - Avoid intermittent test failures due to a test that had relied on
  4835. onion service introduction point creation finishing within 5
  4836. seconds of real clock time. Fixes bug 25450; bugfix
  4837. on 0.3.1.3-alpha.
  4838. - Rust crates are now automatically detected and tested. Previously,
  4839. some crates were not tested by `make test-rust` due to a static
  4840. string in the `src/test/test_rust.sh` script specifying which
  4841. crates to test. Fixes bug 25560; bugfix on 0.3.3.3-alpha.
  4842. o Minor bugfixes (testing, benchmarks):
  4843. - Fix a crash when running benchmark tests on win32 systems. The
  4844. crash was due to a mutex that wasn't initialized before logging
  4845. and options were initialized. Fixes bug 25479; bugfix
  4846. on 0.3.3.3-alpha.
  4847. o Minor bugfixes (warnings, ipv6):
  4848. - Avoid a bug warning that could occur when trying to connect to a
  4849. relay over IPv6. This warning would occur on a Tor instance that
  4850. downloads router descriptors, but prefers to use microdescriptors.
  4851. Fixes bug 25213; bugfix on 0.3.3.1-alpha.
  4852. o Code simplification and refactoring:
  4853. - Remove the old (deterministic) directory retry logic entirely:
  4854. We've used exponential backoff exclusively for some time. Closes
  4855. ticket 23814.
  4856. o Documentation:
  4857. - Improved the documentation of AccountingStart parameter. Closes
  4858. ticket 23635.
  4859. - Update the documentation for "Log" to include the current list of
  4860. logging domains. Closes ticket 25378.
  4861. Changes in version 0.3.1.10 - 2018-03-03
  4862. Tor 0.3.1.10 backports a number of bugfixes, including important fixes for
  4863. security issues.
  4864. It includes an important security fix for a remote crash attack
  4865. against directory authorities, tracked as TROVE-2018-001.
  4866. This release also backports our new system for improved resistance to
  4867. denial-of-service attacks against relays.
  4868. This release also fixes several minor bugs and annoyances from
  4869. earlier releases.
  4870. All directory authorities should upgrade to one of the versions
  4871. released today. Relays running 0.3.1.x may wish to update to one of
  4872. the versions released today, for the DoS mitigations.
  4873. Please note: according to our release calendar, Tor 0.3.1 will no
  4874. longer be supported after 1 July 2018. If you will be running Tor
  4875. after that date, you should make sure to plan to upgrade to the latest
  4876. stable version, or downgrade to 0.2.9 (which will receive long-term
  4877. support).
  4878. o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
  4879. - Fix a protocol-list handling bug that could be used to remotely crash
  4880. directory authorities with a null-pointer exception. Fixes bug 25074;
  4881. bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
  4882. CVE-2018-0490.
  4883. o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
  4884. - Give relays some defenses against the recent network overload. We
  4885. start with three defenses (default parameters in parentheses).
  4886. First: if a single client address makes too many concurrent
  4887. connections (>100), hang up on further connections. Second: if a
  4888. single client address makes circuits too quickly (more than 3 per
  4889. second, with an allowed burst of 90) while also having too many
  4890. connections open (3), refuse new create cells for the next while
  4891. (1-2 hours). Third: if a client asks to establish a rendezvous
  4892. point to you directly, ignore the request. These defenses can be
  4893. manually controlled by new torrc options, but relays will also
  4894. take guidance from consensus parameters, so there's no need to
  4895. configure anything manually. Implements ticket 24902.
  4896. o Minor features (linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
  4897. - Update the sandbox rules so that they should now work correctly
  4898. with Glibc 2.26. Closes ticket 24315.
  4899. o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha):
  4900. - Fix an "off by 2" error in counting rendezvous failures on the
  4901. onion service side. While we thought we would stop the rendezvous
  4902. attempt after one failed circuit, we were actually making three
  4903. circuit attempts before giving up. Now switch to a default of 2,
  4904. and allow the consensus parameter "hs_service_max_rdv_failures" to
  4905. override. Fixes bug 24895; bugfix on 0.0.6.
  4906. o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha):
  4907. - Add Link protocol version 5 to the supported protocols list. Fixes
  4908. bug 25070; bugfix on 0.3.1.1-alpha.
  4909. o Major bugfixes (relay, backport from 0.3.3.1-alpha):
  4910. - Fix a set of false positives where relays would consider
  4911. connections to other relays as being client-only connections (and
  4912. thus e.g. deserving different link padding schemes) if those
  4913. relays fell out of the consensus briefly. Now we look only at the
  4914. initial handshake and whether the connection authenticated as a
  4915. relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
  4916. o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha):
  4917. - Make our OOM handler aware of the geoip client history cache so it
  4918. doesn't fill up the memory. This check is important for IPv6 and
  4919. our DoS mitigation subsystem. Closes ticket 25122.
  4920. o Minor feature (relay statistics, backport from 0.3.2.6-alpha):
  4921. - Change relay bandwidth reporting stats interval from 4 hours to 24
  4922. hours in order to reduce the efficiency of guard discovery
  4923. attacks. Fixes ticket 23856.
  4924. o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha):
  4925. - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
  4926. Previous versions of Tor would not have worked with OpenSSL 1.1.1,
  4927. since they neither disabled TLS 1.3 nor enabled any of the
  4928. ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
  4929. Closes ticket 24978.
  4930. o Minor features (fallback directory mirrors, backport from 0.3.2.9):
  4931. - The fallback directory list has been re-generated based on the
  4932. current status of the network. Tor uses fallback directories to
  4933. bootstrap when it doesn't yet have up-to-date directory
  4934. information. Closes ticket 24801.
  4935. - Make the default DirAuthorityFallbackRate 0.1, so that clients
  4936. prefer to bootstrap from fallback directory mirrors. This is a
  4937. follow-up to 24679, which removed weights from the default
  4938. fallbacks. Implements ticket 24681.
  4939. o Minor features (geoip):
  4940. - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
  4941. Country database.
  4942. o Minor bugfix (channel connection, backport from 0.3.3.2-alpha):
  4943. - Use the actual observed address of an incoming relay connection,
  4944. not the canonical address of the relay from its descriptor, when
  4945. making decisions about how to handle the incoming connection.
  4946. Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
  4947. o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
  4948. - Directory authorities, when refusing a descriptor from a rejected
  4949. relay, now explicitly tell the relay (in its logs) to set a valid
  4950. ContactInfo address and contact the bad-relays@ mailing list.
  4951. Fixes bug 25170; bugfix on 0.2.9.1.
  4952. o Minor bugfixes (address selection, backport from 0.3.2.9):
  4953. - When the fascist_firewall_choose_address_ functions don't find a
  4954. reachable address, set the returned address to the null address
  4955. and port. This is a precautionary measure, because some callers do
  4956. not check the return value. Fixes bug 24736; bugfix
  4957. on 0.2.8.2-alpha.
  4958. o Major bugfixes (bootstrapping, backport from 0.3.2.5-alpha):
  4959. - Fetch descriptors aggressively whenever we lack enough to build
  4960. circuits, regardless of how many descriptors we are missing.
  4961. Previously, we would delay launching the fetch when we had fewer
  4962. than 15 missing descriptors, even if some of those descriptors
  4963. were blocking circuits from building. Fixes bug 23985; bugfix on
  4964. 0.1.1.11-alpha. The effects of this bug became worse in
  4965. 0.3.0.3-alpha, when we began treating missing descriptors from our
  4966. primary guards as a reason to delay circuits.
  4967. - Don't try fetching microdescriptors from relays that have failed
  4968. to deliver them in the past. Fixes bug 23817; bugfix
  4969. on 0.3.0.1-alpha.
  4970. o Minor bugfixes (compilation, backport from 0.3.2.7-rc):
  4971. - Fix a signed/unsigned comparison warning introduced by our fix to
  4972. TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
  4973. o Minor bugfixes (control port, linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
  4974. - Avoid a crash when attempting to use the seccomp2 sandbox together
  4975. with the OwningControllerProcess feature. Fixes bug 24198; bugfix
  4976. on 0.2.5.1-alpha.
  4977. o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
  4978. - Fix a possible crash on malformed consensus. If a consensus had
  4979. contained an unparseable protocol line, it could have made clients
  4980. and relays crash with a null-pointer exception. To exploit this
  4981. issue, however, an attacker would need to be able to subvert the
  4982. directory authority system. Fixes bug 25251; bugfix on
  4983. 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
  4984. o Minor bugfixes (directory cache, backport from 0.3.2.5-alpha):
  4985. - Recover better from empty or corrupt files in the consensus cache
  4986. directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
  4987. - When a consensus diff calculation is only partially successful,
  4988. only record the successful parts as having succeeded. Partial
  4989. success can happen if (for example) one compression method fails
  4990. but the others succeed. Previously we misrecorded all the
  4991. calculations as having succeeded, which would later cause a
  4992. nonfatal assertion failure. Fixes bug 24086; bugfix
  4993. on 0.3.1.1-alpha.
  4994. o Minor bugfixes (entry guards, backport from 0.3.2.3-alpha):
  4995. - Tor now updates its guard state when it reads a consensus
  4996. regardless of whether it's missing descriptors. That makes tor use
  4997. its primary guards to fetch descriptors in some edge cases where
  4998. it would previously have used fallback directories. Fixes bug
  4999. 23862; bugfix on 0.3.0.1-alpha.
  5000. o Minor bugfixes (logging, backport from 0.3.3.2-alpha):
  5001. - Don't treat inability to store a cached consensus object as a bug:
  5002. it can happen normally when we are out of disk space. Fixes bug
  5003. 24859; bugfix on 0.3.1.1-alpha.
  5004. o Minor bugfixes (memory usage, backport from 0.3.2.8-rc):
  5005. - When queuing DESTROY cells on a channel, only queue the circuit-id
  5006. and reason fields: not the entire 514-byte cell. This fix should
  5007. help mitigate any bugs or attacks that fill up these queues, and
  5008. free more RAM for other uses. Fixes bug 24666; bugfix
  5009. on 0.2.5.1-alpha.
  5010. o Minor bugfixes (network layer, backport from 0.3.2.5-alpha):
  5011. - When closing a connection via close_connection_immediately(), we
  5012. mark it as "not blocked on bandwidth", to prevent later calls from
  5013. trying to unblock it, and give it permission to read. This fixes a
  5014. backtrace warning that can happen on relays under various
  5015. circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
  5016. o Minor bugfixes (path selection, backport from 0.3.2.4-alpha):
  5017. - When selecting relays by bandwidth, avoid a rounding error that
  5018. could sometimes cause load to be imbalanced incorrectly.
  5019. Previously, we would always round upwards; now, we round towards
  5020. the nearest integer. This had the biggest effect when a relay's
  5021. weight adjustments should have given it weight 0, but it got
  5022. weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
  5023. - When calculating the fraction of nodes that have descriptors, and
  5024. all nodes in the network have zero bandwidths, count the number of
  5025. nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
  5026. - Actually log the total bandwidth in compute_weighted_bandwidths().
  5027. Fixes bug 24170; bugfix on 0.2.4.3-alpha.
  5028. o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha):
  5029. - Improve the performance of our consensus-diff application code
  5030. when Tor is built with the --enable-fragile-hardening option set.
  5031. Fixes bug 24826; bugfix on 0.3.1.1-alpha.
  5032. o Minor bugfixes (OSX, backport from 0.3.3.1-alpha):
  5033. - Don't exit the Tor process if setrlimit() fails to change the file
  5034. limit (which can happen sometimes on some versions of OSX). Fixes
  5035. bug 21074; bugfix on 0.0.9pre5.
  5036. o Minor bugfixes (portability, msvc, backport from 0.3.2.9):
  5037. - Fix a bug in the bit-counting parts of our timing-wheel code on
  5038. MSVC. (Note that MSVC is still not a supported build platform, due
  5039. to cyptographic timing channel risks.) Fixes bug 24633; bugfix
  5040. on 0.2.9.1-alpha.
  5041. o Minor bugfixes (relay, partial backport):
  5042. - Make the internal channel_is_client() function look at what sort
  5043. of connection handshake the other side used, rather than whether
  5044. the other side ever sent a create_fast cell to us. Backports part
  5045. of the fixes from bugs 22805 and 24898.
  5046. o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
  5047. - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
  5048. 0.2.9.4-alpha.
  5049. - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
  5050. bugfix on 0.2.9.4-alpha.
  5051. o Code simplification and refactoring (backport from 0.3.3.3-alpha):
  5052. - Update the "rust dependencies" submodule to be a project-level
  5053. repository, rather than a user repository. Closes ticket 25323.
  5054. Changes in version 0.2.9.15 - 2018-03-03
  5055. Tor 0.2.9.15 backports important security and stability bugfixes from
  5056. later Tor releases.
  5057. It includes an important security fix for a remote crash attack
  5058. against directory authorities, tracked as TROVE-2018-001.
  5059. This release also backports our new system for improved resistance to
  5060. denial-of-service attacks against relays.
  5061. This release also fixes several minor bugs and annoyances from
  5062. earlier releases.
  5063. All directory authorities should upgrade to one of the versions
  5064. released today. Relays running 0.2.9.x may wish to update to one of
  5065. the versions released today, for the DoS mitigations.
  5066. o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
  5067. - Fix a protocol-list handling bug that could be used to remotely crash
  5068. directory authorities with a null-pointer exception. Fixes bug 25074;
  5069. bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
  5070. CVE-2018-0490.
  5071. o Major features (denial-of-service mitigation):
  5072. - Give relays some defenses against the recent network overload. We
  5073. start with three defenses (default parameters in parentheses).
  5074. First: if a single client address makes too many concurrent
  5075. connections (>100), hang up on further connections. Second: if a
  5076. single client address makes circuits too quickly (more than 3 per
  5077. second, with an allowed burst of 90) while also having too many
  5078. connections open (3), refuse new create cells for the next while
  5079. (1-2 hours). Third: if a client asks to establish a rendezvous
  5080. point to you directly, ignore the request. These defenses can be
  5081. manually controlled by new torrc options, but relays will also
  5082. take guidance from consensus parameters, so there's no need to
  5083. configure anything manually. Implements ticket 24902.
  5084. o Major bugfixes (bootstrapping):
  5085. - Fetch descriptors aggressively whenever we lack enough to build
  5086. circuits, regardless of how many descriptors we are missing.
  5087. Previously, we would delay launching the fetch when we had fewer
  5088. than 15 missing descriptors, even if some of those descriptors
  5089. were blocking circuits from building. Fixes bug 23985; bugfix on
  5090. 0.1.1.11-alpha. The effects of this bug became worse in
  5091. 0.3.0.3-alpha, when we began treating missing descriptors from our
  5092. primary guards as a reason to delay circuits.
  5093. o Major bugfixes (onion services, retry behavior):
  5094. - Fix an "off by 2" error in counting rendezvous failures on the
  5095. onion service side. While we thought we would stop the rendezvous
  5096. attempt after one failed circuit, we were actually making three
  5097. circuit attempts before giving up. Now switch to a default of 2,
  5098. and allow the consensus parameter "hs_service_max_rdv_failures" to
  5099. override. Fixes bug 24895; bugfix on 0.0.6.
  5100. o Minor feature (relay statistics):
  5101. - Change relay bandwidth reporting stats interval from 4 hours to 24
  5102. hours in order to reduce the efficiency of guard discovery
  5103. attacks. Fixes ticket 23856.
  5104. o Minor features (compatibility, OpenSSL):
  5105. - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
  5106. Previous versions of Tor would not have worked with OpenSSL 1.1.1,
  5107. since they neither disabled TLS 1.3 nor enabled any of the
  5108. ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
  5109. Closes ticket 24978.
  5110. o Minor features (denial-of-service avoidance):
  5111. - Make our OOM handler aware of the geoip client history cache so it
  5112. doesn't fill up the memory. This check is important for IPv6 and
  5113. our DoS mitigation subsystem. Closes ticket 25122.
  5114. o Minor features (fallback directory mirrors):
  5115. - The fallback directory list has been re-generated based on the
  5116. current status of the network. Tor uses fallback directories to
  5117. bootstrap when it doesn't yet have up-to-date directory
  5118. information. Closes ticket 24801.
  5119. - Make the default DirAuthorityFallbackRate 0.1, so that clients
  5120. prefer to bootstrap from fallback directory mirrors. This is a
  5121. follow-up to 24679, which removed weights from the default
  5122. fallbacks. Implements ticket 24681.
  5123. o Minor features (geoip):
  5124. - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
  5125. Country database.
  5126. o Minor features (linux seccomp2 sandbox):
  5127. - Update the sandbox rules so that they should now work correctly
  5128. with Glibc 2.26. Closes ticket 24315.
  5129. o Minor bugfix (channel connection):
  5130. - Use the actual observed address of an incoming relay connection,
  5131. not the canonical address of the relay from its descriptor, when
  5132. making decisions about how to handle the incoming connection.
  5133. Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
  5134. o Minor bugfix (directory authority):
  5135. - Directory authorities, when refusing a descriptor from a rejected
  5136. relay, now explicitly tell the relay (in its logs) to set a valid
  5137. ContactInfo address and contact the bad-relays@ mailing list.
  5138. Fixes bug 25170; bugfix on 0.2.9.1.
  5139. o Minor bugfixes (address selection):
  5140. - When the fascist_firewall_choose_address_ functions don't find a
  5141. reachable address, set the returned address to the null address
  5142. and port. This is a precautionary measure, because some callers do
  5143. not check the return value. Fixes bug 24736; bugfix
  5144. on 0.2.8.2-alpha.
  5145. o Minor bugfixes (compilation):
  5146. - Fix a signed/unsigned comparison warning introduced by our fix to
  5147. TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
  5148. o Minor bugfixes (control port, linux seccomp2 sandbox):
  5149. - Avoid a crash when attempting to use the seccomp2 sandbox together
  5150. with the OwningControllerProcess feature. Fixes bug 24198; bugfix
  5151. on 0.2.5.1-alpha.
  5152. o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
  5153. - Fix a possible crash on malformed consensus. If a consensus had
  5154. contained an unparseable protocol line, it could have made clients
  5155. and relays crash with a null-pointer exception. To exploit this
  5156. issue, however, an attacker would need to be able to subvert the
  5157. directory authority system. Fixes bug 25251; bugfix on
  5158. 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
  5159. o Minor bugfixes (memory usage):
  5160. - When queuing DESTROY cells on a channel, only queue the circuit-id
  5161. and reason fields: not the entire 514-byte cell. This fix should
  5162. help mitigate any bugs or attacks that fill up these queues, and
  5163. free more RAM for other uses. Fixes bug 24666; bugfix
  5164. on 0.2.5.1-alpha.
  5165. o Minor bugfixes (network layer):
  5166. - When closing a connection via close_connection_immediately(), we
  5167. mark it as "not blocked on bandwidth", to prevent later calls from
  5168. trying to unblock it, and give it permission to read. This fixes a
  5169. backtrace warning that can happen on relays under various
  5170. circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
  5171. o Minor bugfixes (OSX):
  5172. - Don't exit the Tor process if setrlimit() fails to change the file
  5173. limit (which can happen sometimes on some versions of OSX). Fixes
  5174. bug 21074; bugfix on 0.0.9pre5.
  5175. o Minor bugfixes (path selection):
  5176. - When selecting relays by bandwidth, avoid a rounding error that
  5177. could sometimes cause load to be imbalanced incorrectly.
  5178. Previously, we would always round upwards; now, we round towards
  5179. the nearest integer. This had the biggest effect when a relay's
  5180. weight adjustments should have given it weight 0, but it got
  5181. weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
  5182. - When calculating the fraction of nodes that have descriptors, and
  5183. all nodes in the network have zero bandwidths, count the number of
  5184. nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
  5185. - Actually log the total bandwidth in compute_weighted_bandwidths().
  5186. Fixes bug 24170; bugfix on 0.2.4.3-alpha.
  5187. o Minor bugfixes (portability, msvc):
  5188. - Fix a bug in the bit-counting parts of our timing-wheel code on
  5189. MSVC. (Note that MSVC is still not a supported build platform, due
  5190. to cryptographic timing channel risks.) Fixes bug 24633; bugfix
  5191. on 0.2.9.1-alpha.
  5192. o Minor bugfixes (relay):
  5193. - Make the internal channel_is_client() function look at what sort
  5194. of connection handshake the other side used, rather than whether
  5195. the other side ever sent a create_fast cell to us. Backports part
  5196. of the fixes from bugs 22805 and 24898.
  5197. o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
  5198. - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
  5199. 0.2.9.4-alpha.
  5200. - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
  5201. bugfix on 0.2.9.4-alpha.
  5202. Changes in version 0.3.2.10 - 2018-03-03
  5203. Tor 0.3.2.10 is the second stable release in the 0.3.2 series. It
  5204. backports a number of bugfixes, including important fixes for security
  5205. issues.
  5206. It includes an important security fix for a remote crash attack
  5207. against directory authorities, tracked as TROVE-2018-001.
  5208. Additionally, it backports a fix for a bug whose severity we have
  5209. upgraded: Bug 24700, which was fixed in 0.3.3.2-alpha, can be remotely
  5210. triggered in order to crash relays with a use-after-free pattern. As
  5211. such, we are now tracking that bug as TROVE-2018-002 and
  5212. CVE-2018-0491, and backporting it to earlier releases. This bug
  5213. affected versions 0.3.2.1-alpha through 0.3.2.9, as well as version
  5214. 0.3.3.1-alpha.
  5215. This release also backports our new system for improved resistance to
  5216. denial-of-service attacks against relays.
  5217. This release also fixes several minor bugs and annoyances from
  5218. earlier releases.
  5219. Relays running 0.3.2.x SHOULD upgrade to one of the versions released
  5220. today, for the fix to TROVE-2018-002. Directory authorities should
  5221. also upgrade. (Relays on earlier versions might want to update too for
  5222. the DoS mitigations.)
  5223. o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
  5224. - Fix a protocol-list handling bug that could be used to remotely crash
  5225. directory authorities with a null-pointer exception. Fixes bug 25074;
  5226. bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
  5227. CVE-2018-0490.
  5228. o Major bugfixes (scheduler, KIST, denial-of-service, backport from 0.3.3.2-alpha):
  5229. - Avoid adding the same channel twice in the KIST scheduler pending
  5230. list, which could lead to remote denial-of-service use-after-free
  5231. attacks against relays. Fixes bug 24700; bugfix on 0.3.2.1-alpha.
  5232. o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
  5233. - Give relays some defenses against the recent network overload. We
  5234. start with three defenses (default parameters in parentheses).
  5235. First: if a single client address makes too many concurrent
  5236. connections (>100), hang up on further connections. Second: if a
  5237. single client address makes circuits too quickly (more than 3 per
  5238. second, with an allowed burst of 90) while also having too many
  5239. connections open (3), refuse new create cells for the next while
  5240. (1-2 hours). Third: if a client asks to establish a rendezvous
  5241. point to you directly, ignore the request. These defenses can be
  5242. manually controlled by new torrc options, but relays will also
  5243. take guidance from consensus parameters, so there's no need to
  5244. configure anything manually. Implements ticket 24902.
  5245. o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha):
  5246. - Fix an "off by 2" error in counting rendezvous failures on the
  5247. onion service side. While we thought we would stop the rendezvous
  5248. attempt after one failed circuit, we were actually making three
  5249. circuit attempts before giving up. Now switch to a default of 2,
  5250. and allow the consensus parameter "hs_service_max_rdv_failures" to
  5251. override. Fixes bug 24895; bugfix on 0.0.6.
  5252. - New-style (v3) onion services now obey the "max rendezvous circuit
  5253. attempts" logic. Previously they would make as many rendezvous
  5254. circuit attempts as they could fit in the MAX_REND_TIMEOUT second
  5255. window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha.
  5256. o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha):
  5257. - Add Link protocol version 5 to the supported protocols list. Fixes
  5258. bug 25070; bugfix on 0.3.1.1-alpha.
  5259. o Major bugfixes (relay, backport from 0.3.3.1-alpha):
  5260. - Fix a set of false positives where relays would consider
  5261. connections to other relays as being client-only connections (and
  5262. thus e.g. deserving different link padding schemes) if those
  5263. relays fell out of the consensus briefly. Now we look only at the
  5264. initial handshake and whether the connection authenticated as a
  5265. relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
  5266. o Major bugfixes (scheduler, consensus, backport from 0.3.3.2-alpha):
  5267. - The scheduler subsystem was failing to promptly notice changes in
  5268. consensus parameters, making it harder to switch schedulers
  5269. network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha.
  5270. o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha):
  5271. - Make our OOM handler aware of the geoip client history cache so it
  5272. doesn't fill up the memory. This check is important for IPv6 and
  5273. our DoS mitigation subsystem. Closes ticket 25122.
  5274. o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha):
  5275. - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
  5276. Previous versions of Tor would not have worked with OpenSSL 1.1.1,
  5277. since they neither disabled TLS 1.3 nor enabled any of the
  5278. ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
  5279. Closes ticket 24978.
  5280. o Minor features (geoip):
  5281. - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
  5282. Country database.
  5283. o Minor features (logging, diagnostic, backport from 0.3.3.2-alpha):
  5284. - When logging a failure to create an onion service's descriptor,
  5285. also log what the problem with the descriptor was. Diagnostic
  5286. for ticket 24972.
  5287. o Minor bugfix (channel connection, backport from 0.3.3.2-alpha):
  5288. - Use the actual observed address of an incoming relay connection,
  5289. not the canonical address of the relay from its descriptor, when
  5290. making decisions about how to handle the incoming connection.
  5291. Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
  5292. o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
  5293. - Fix a possible crash on malformed consensus. If a consensus had
  5294. contained an unparseable protocol line, it could have made clients
  5295. and relays crash with a null-pointer exception. To exploit this
  5296. issue, however, an attacker would need to be able to subvert the
  5297. directory authority system. Fixes bug 25251; bugfix on
  5298. 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
  5299. o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
  5300. - Directory authorities, when refusing a descriptor from a rejected
  5301. relay, now explicitly tell the relay (in its logs) to set a valid
  5302. ContactInfo address and contact the bad-relays@ mailing list.
  5303. Fixes bug 25170; bugfix on 0.2.9.1.
  5304. o Minor bugfixes (build, rust, backport from 0.3.3.1-alpha):
  5305. - When building with Rust on OSX, link against libresolv, to work
  5306. around the issue at https://github.com/rust-lang/rust/issues/46797.
  5307. Fixes bug 24652; bugfix on 0.3.1.1-alpha.
  5308. o Minor bugfixes (onion services, backport from 0.3.3.2-alpha):
  5309. - Remove a BUG() statement when a client fetches an onion descriptor
  5310. that has a lower revision counter than the one in its cache. This
  5311. can happen in normal circumstances due to HSDir desync. Fixes bug
  5312. 24976; bugfix on 0.3.2.1-alpha.
  5313. o Minor bugfixes (logging, backport from 0.3.3.2-alpha):
  5314. - Don't treat inability to store a cached consensus object as a bug:
  5315. it can happen normally when we are out of disk space. Fixes bug
  5316. 24859; bugfix on 0.3.1.1-alpha.
  5317. o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha):
  5318. - Improve the performance of our consensus-diff application code
  5319. when Tor is built with the --enable-fragile-hardening option set.
  5320. Fixes bug 24826; bugfix on 0.3.1.1-alpha.
  5321. o Minor bugfixes (OSX, backport from 0.3.3.1-alpha):
  5322. - Don't exit the Tor process if setrlimit() fails to change the file
  5323. limit (which can happen sometimes on some versions of OSX). Fixes
  5324. bug 21074; bugfix on 0.0.9pre5.
  5325. o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
  5326. - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
  5327. 0.2.9.4-alpha.
  5328. - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
  5329. bugfix on 0.2.9.4-alpha.
  5330. o Minor bugfixes (testing, backport from 0.3.3.1-alpha):
  5331. - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
  5332. 25005; bugfix on 0.3.2.7-rc.
  5333. o Minor bugfixes (v3 onion services, backport from 0.3.3.2-alpha):
  5334. - Look at the "HSRend" protocol version, not the "HSDir" protocol
  5335. version, when deciding whether a consensus entry can support the
  5336. v3 onion service protocol as a rendezvous point. Fixes bug 25105;
  5337. bugfix on 0.3.2.1-alpha.
  5338. o Code simplification and refactoring (backport from 0.3.3.3-alpha):
  5339. - Update the "rust dependencies" submodule to be a project-level
  5340. repository, rather than a user repository. Closes ticket 25323.
  5341. o Documentation (backport from 0.3.3.1-alpha)
  5342. - Document that operators who run more than one relay or bridge are
  5343. expected to set MyFamily and ContactInfo correctly. Closes
  5344. ticket 24526.
  5345. Changes in version 0.3.3.3-alpha - 2018-03-03
  5346. Tor 0.3.3.3-alpha is the third alpha release for the 0.3.3.x series.
  5347. It includes an important security fix for a remote crash attack
  5348. against directory authorities tracked as TROVE-2018-001.
  5349. Additionally, with this release, we are upgrading the severity of a
  5350. bug fixed in 0.3.3.2-alpha. Bug 24700, which was fixed in
  5351. 0.3.3.2-alpha, can be remotely triggered in order to crash relays with
  5352. a use-after-free pattern. As such, we are now tracking that bug as
  5353. TROVE-2018-002 and CVE-2018-0491. This bug affected versions
  5354. 0.3.2.1-alpha through 0.3.2.9, as well as 0.3.3.1-alpha.
  5355. This release also fixes several minor bugs and annoyances from
  5356. earlier releases.
  5357. Relays running 0.3.2.x should upgrade to one of the versions released
  5358. today, for the fix to TROVE-2018-002. Directory authorities should
  5359. also upgrade. (Relays on earlier versions might want to update too for
  5360. the DoS mitigations.)
  5361. o Major bugfixes (denial-of-service, directory authority):
  5362. - Fix a protocol-list handling bug that could be used to remotely crash
  5363. directory authorities with a null-pointer exception. Fixes bug 25074;
  5364. bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
  5365. CVE-2018-0490.
  5366. o Minor features (compatibility, OpenSSL):
  5367. - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
  5368. Previous versions of Tor would not have worked with OpenSSL 1.1.1,
  5369. since they neither disabled TLS 1.3 nor enabled any of the
  5370. ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
  5371. Closes ticket 24978.
  5372. o Minor features (logging):
  5373. - Clarify the log messages produced when getrandom() or a related
  5374. entropy-generation mechanism gives an error. Closes ticket 25120.
  5375. o Minor features (testing):
  5376. - Add a "make test-rust" target to run the rust tests only. Closes
  5377. ticket 25071.
  5378. o Minor bugfixes (denial-of-service):
  5379. - Fix a possible crash on malformed consensus. If a consensus had
  5380. contained an unparseable protocol line, it could have made clients
  5381. and relays crash with a null-pointer exception. To exploit this
  5382. issue, however, an attacker would need to be able to subvert the
  5383. directory authority system. Fixes bug 25251; bugfix on
  5384. 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
  5385. o Minor bugfixes (DoS mitigation):
  5386. - Add extra safety checks when refilling the circuit creation bucket
  5387. to ensure we never set a value above the allowed maximum burst.
  5388. Fixes bug 25202; bugfix on 0.3.3.2-alpha.
  5389. - When a new consensus arrives, don't update our DoS-mitigation
  5390. parameters if we aren't a public relay. Fixes bug 25223; bugfix
  5391. on 0.3.3.2-alpha.
  5392. o Minor bugfixes (man page, SocksPort):
  5393. - Remove dead code from the old "SocksSocket" option, and rename
  5394. SocksSocketsGroupWritable to UnixSocksGroupWritable. The old option
  5395. still works, but is deprecated. Fixes bug 24343; bugfix on 0.2.6.3.
  5396. o Minor bugfixes (performance):
  5397. - Reduce the number of circuits that will be opened at once during
  5398. the circuit build timeout phase. This is done by increasing the
  5399. idle timeout to 3 minutes, and lowering the maximum number of
  5400. concurrent learning circuits to 10. Fixes bug 24769; bugfix
  5401. on 0.3.1.1-alpha.
  5402. o Minor bugfixes (spec conformance):
  5403. - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
  5404. 0.2.9.4-alpha.
  5405. - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
  5406. bugfix on 0.2.9.4-alpha.
  5407. o Minor bugfixes (spec conformance, rust):
  5408. - Resolve a denial-of-service issue caused by an infinite loop in
  5409. the rust protover code. Fixes bug 25250, bugfix on 0.3.3.1-alpha.
  5410. Also tracked as TROVE-2018-003.
  5411. o Code simplification and refactoring:
  5412. - Update the "rust dependencies" submodule to be a project-level
  5413. repository, rather than a user repository. Closes ticket 25323.
  5414. Changes in version 0.3.3.2-alpha - 2018-02-10
  5415. Tor 0.3.3.2-alpha is the second alpha in the 0.3.3.x series. It
  5416. introduces a mechanism to handle the high loads that many relay
  5417. operators have been reporting recently. It also fixes several bugs in
  5418. older releases. If this new code proves reliable, we plan to backport
  5419. it to older supported release series.
  5420. o Major features (denial-of-service mitigation):
  5421. - Give relays some defenses against the recent network overload. We
  5422. start with three defenses (default parameters in parentheses).
  5423. First: if a single client address makes too many concurrent
  5424. connections (>100), hang up on further connections. Second: if a
  5425. single client address makes circuits too quickly (more than 3 per
  5426. second, with an allowed burst of 90) while also having too many
  5427. connections open (3), refuse new create cells for the next while
  5428. (1-2 hours). Third: if a client asks to establish a rendezvous
  5429. point to you directly, ignore the request. These defenses can be
  5430. manually controlled by new torrc options, but relays will also
  5431. take guidance from consensus parameters, so there's no need to
  5432. configure anything manually. Implements ticket 24902.
  5433. o Major bugfixes (netflow padding):
  5434. - Stop adding unneeded channel padding right after we finish
  5435. flushing to a connection that has been trying to flush for many
  5436. seconds. Instead, treat all partial or complete flushes as
  5437. activity on the channel, which will defer the time until we need
  5438. to add padding. This fix should resolve confusing and scary log
  5439. messages like "Channel padding timeout scheduled 221453ms in the
  5440. past." Fixes bug 22212; bugfix on 0.3.1.1-alpha.
  5441. o Major bugfixes (protocol versions):
  5442. - Add Link protocol version 5 to the supported protocols list. Fixes
  5443. bug 25070; bugfix on 0.3.1.1-alpha.
  5444. o Major bugfixes (scheduler, consensus):
  5445. - The scheduler subsystem was failing to promptly notice changes in
  5446. consensus parameters, making it harder to switch schedulers
  5447. network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha.
  5448. o Minor features (denial-of-service avoidance):
  5449. - Make our OOM handler aware of the geoip client history cache so it
  5450. doesn't fill up the memory. This check is important for IPv6 and
  5451. our DoS mitigation subsystem. Closes ticket 25122.
  5452. o Minor features (directory authority):
  5453. - When directory authorities are unable to add signatures to a
  5454. pending consensus, log the reason why. Closes ticket 24849.
  5455. o Minor features (geoip):
  5456. - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
  5457. Country database.
  5458. o Minor features (logging, diagnostic):
  5459. - When logging a failure to create an onion service's descriptor,
  5460. also log what the problem with the descriptor was. Diagnostic for
  5461. ticket 24972.
  5462. o Minor bugfix (channel connection):
  5463. - Use the actual observed address of an incoming relay connection,
  5464. not the canonical address of the relay from its descriptor, when
  5465. making decisions about how to handle the incoming connection.
  5466. Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
  5467. o Minor bugfix (directory authority):
  5468. - Directory authorities, when refusing a descriptor from a rejected
  5469. relay, now explicitly tell the relay (in its logs) to set a valid
  5470. ContactInfo address and contact the bad-relays@ mailing list.
  5471. Fixes bug 25170; bugfix on 0.2.9.1.
  5472. o Minor bugfixes (all versions of Tor):
  5473. - Use the "misspell" tool to detect and fix typos throughout the
  5474. source code. Fixes bug 23650; bugfix on various versions of Tor.
  5475. Patch from Deepesh Pathak.
  5476. o Minor bugfixes (circuit, cannibalization):
  5477. - Don't cannibalize preemptively-built circuits if we no longer
  5478. recognize their first hop. This situation can happen if our Guard
  5479. relay went off the consensus after the circuit was created. Fixes
  5480. bug 24469; bugfix on 0.0.6.
  5481. o Minor bugfixes (correctness):
  5482. - Remove a nonworking, unnecessary check to see whether a circuit
  5483. hop's identity digest was set when the circuit failed. Fixes bug
  5484. 24927; bugfix on 0.2.4.4-alpha.
  5485. o Minor bugfixes (logging):
  5486. - Don't treat inability to store a cached consensus object as a bug:
  5487. it can happen normally when we are out of disk space. Fixes bug
  5488. 24859; bugfix on 0.3.1.1-alpha.
  5489. - Fix a (mostly harmless) race condition when invoking
  5490. LOG_PROTOCOL_WARN message from a subthread while the torrc options
  5491. are changing. Fixes bug 23954; bugfix on 0.1.1.9-alpha.
  5492. o Minor bugfixes (onion services):
  5493. - Remove a BUG() statement when a client fetches an onion descriptor
  5494. that has a lower revision counter than the one in its cache. This
  5495. can happen in normal circumstances due to HSDir desync. Fixes bug
  5496. 24976; bugfix on 0.3.2.1-alpha.
  5497. - If we are configured to offer a single onion service, don't log
  5498. long-term established one hop rendezvous points in the heartbeat.
  5499. Fixes bug 25116; bugfix on 0.2.9.6-rc.
  5500. o Minor bugfixes (performance):
  5501. - Avoid calling protocol_list_supports_protocol() from inside tight
  5502. loops when running with cached routerinfo_t objects. Instead,
  5503. summarize the relevant protocols as flags in the routerinfo_t, as
  5504. we do for routerstatus_t objects. This change simplifies our code
  5505. a little, and saves a large amount of short-term memory allocation
  5506. operations. Fixes bug 25008; bugfix on 0.2.9.4-alpha.
  5507. o Minor bugfixes (Rust FFI):
  5508. - Fix a minor memory leak which would happen whenever the C code
  5509. would call the Rust implementation of
  5510. protover_get_supported_protocols(). This was due to the C version
  5511. returning a static string, whereas the Rust version newly allocated
  5512. a CString to pass across the FFI boundary. Consequently, the C
  5513. code was not expecting to need to free() what it was given. Fixes
  5514. bug 25127; bugfix on 0.3.2.1-alpha.
  5515. o Minor bugfixes (scheduler, KIST):
  5516. - Avoid adding the same channel twice in the KIST scheduler pending
  5517. list, which would waste CPU cycles. Fixes bug 24700; bugfix
  5518. on 0.3.2.1-alpha.
  5519. o Minor bugfixes (unit test, monotonic time):
  5520. - Increase a constant (1msec to 10msec) in the monotonic time test
  5521. that makes sure the nsec/usec/msec times read are synchronized.
  5522. This change was needed to accommodate slow systems like armel or
  5523. when the clock_gettime() is not a VDSO on the running kernel.
  5524. Fixes bug 25113; bugfix on 0.2.9.1.
  5525. o Minor bugfixes (v3 onion services):
  5526. - Look at the "HSRend" protocol version, not the "HSDir" protocol
  5527. version, when deciding whether a consensus entry can support the
  5528. v3 onion service protocol as a rendezvous point. Fixes bug 25105;
  5529. bugfix on 0.3.2.1-alpha.
  5530. o Code simplification and refactoring:
  5531. - Remove the unused nodelist_recompute_all_hsdir_indices(). Closes
  5532. ticket 25108.
  5533. - Remove a series of counters used to track circuit extend attempts
  5534. and connection status but that in reality we aren't using for
  5535. anything other than stats logged by a SIGUSR1 signal. Closes
  5536. ticket 25163.
  5537. o Documentation (man page):
  5538. - The HiddenServiceVersion torrc option accepts only one number:
  5539. either version 2 or 3. Closes ticket 25026; bugfix
  5540. on 0.3.2.2-alpha.
  5541. Changes in version 0.3.3.1-alpha - 2018-01-25
  5542. Tor 0.3.3.1-alpha is the first release in the 0.3.3.x series. It adds
  5543. several new features to Tor, including several improvements to
  5544. bootstrapping, and support for an experimental "vanguards" feature to
  5545. resist guard discovery attacks. This series also includes better
  5546. support for applications that need to embed Tor or manage v3
  5547. onion services.
  5548. o Major features (embedding):
  5549. - There is now a documented stable API for programs that need to
  5550. embed Tor. See tor_api.h for full documentation and known bugs.
  5551. Closes ticket 23684.
  5552. - Tor now has support for restarting in the same process.
  5553. Controllers that run Tor using the "tor_api.h" interface can now
  5554. restart Tor after Tor has exited. This support is incomplete,
  5555. however: we fixed crash bugs that prevented it from working at
  5556. all, but many bugs probably remain, including a possibility of
  5557. security issues. Implements ticket 24581.
  5558. o Major features (IPv6, directory documents):
  5559. - Add consensus method 27, which adds IPv6 ORPorts to the microdesc
  5560. consensus. This information makes it easier for IPv6 clients to
  5561. bootstrap and choose reachable entry guards. Implements ticket 23826.
  5562. - Add consensus method 28, which removes IPv6 ORPorts from
  5563. microdescriptors. Now that the consensus contains IPv6 ORPorts, they
  5564. are redundant in microdescs. This change will be used by Tor clients
  5565. on 0.2.8.x and later. (That is to say, with all Tor clients that
  5566. have IPv6 bootstrap and guard support.) Implements ticket 23828.
  5567. - Expand the documentation for AuthDirHasIPv6Connectivity when it is
  5568. set by different numbers of authorities. Fixes 23870
  5569. on 0.2.4.1-alpha.
  5570. o Major features (onion service v3, control port):
  5571. - The control port now supports commands and events for v3 onion
  5572. services. It is now possible to create ephemeral v3 services using
  5573. ADD_ONION. Additionally, several events (HS_DESC, HS_DESC_CONTENT,
  5574. CIRC and CIRC_MINOR) and commands (GETINFO, HSPOST, ADD_ONION and
  5575. DEL_ONION) have been extended to support v3 onion services. Closes
  5576. ticket 20699; implements proposal 284.
  5577. o Major features (onion services):
  5578. - Provide torrc options to pin the second and third hops of onion
  5579. service circuits to a list of nodes. The option HSLayer2Guards
  5580. pins the second hop, and the option HSLayer3Guards pins the third
  5581. hop. These options are for use in conjunction with experiments
  5582. with "vanguards" for preventing guard enumeration attacks. Closes
  5583. ticket 13837.
  5584. o Major features (rust, portability, experimental):
  5585. - Tor now ships with an optional implementation of one of its
  5586. smaller modules (protover.c) in the Rust programming language. To
  5587. try it out, install a Rust build environment, and configure Tor
  5588. with "--enable-rust --enable-cargo-online-mode". This should not
  5589. cause any user-visible changes, but should help us gain more
  5590. experience with Rust, and plan future Rust integration work.
  5591. Implementation by Chelsea Komlo. Closes ticket 22840.
  5592. o Minor features (storage, configuration):
  5593. - Users can store cached directory documents somewhere other than
  5594. the DataDirectory by using the CacheDirectory option. Similarly,
  5595. the storage location for relay's keys can be overridden with the
  5596. KeyDirectory option. Closes ticket 22703.
  5597. o Major features (v3 onion services, ipv6):
  5598. - When v3 onion service clients send introduce cells, they now
  5599. include the IPv6 address of the rendezvous point, if it has one.
  5600. Current v3 onion services running 0.3.2 ignore IPv6 addresses, but
  5601. in future Tor versions, IPv6-only v3 single onion services will be
  5602. able to use IPv6 addresses to connect directly to the rendezvous
  5603. point. Closes ticket 23577. Patch by Neel Chauhan.
  5604. o Major bugfixes (onion services, retry behavior):
  5605. - Fix an "off by 2" error in counting rendezvous failures on the
  5606. onion service side. While we thought we would stop the rendezvous
  5607. attempt after one failed circuit, we were actually making three
  5608. circuit attempts before giving up. Now switch to a default of 2,
  5609. and allow the consensus parameter "hs_service_max_rdv_failures" to
  5610. override. Fixes bug 24895; bugfix on 0.0.6.
  5611. - New-style (v3) onion services now obey the "max rendezvous circuit
  5612. attempts" logic. Previously they would make as many rendezvous
  5613. circuit attempts as they could fit in the MAX_REND_TIMEOUT second
  5614. window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha.
  5615. o Major bugfixes (relays):
  5616. - Fix a set of false positives where relays would consider
  5617. connections to other relays as being client-only connections (and
  5618. thus e.g. deserving different link padding schemes) if those
  5619. relays fell out of the consensus briefly. Now we look only at the
  5620. initial handshake and whether the connection authenticated as a
  5621. relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
  5622. o Minor feature (IPv6):
  5623. - Make IPv6-only clients wait for microdescs for relays, even if we
  5624. were previously using descriptors (or were using them as a bridge)
  5625. and have a cached descriptor for them. Implements ticket 23827.
  5626. - When a consensus has IPv6 ORPorts, make IPv6-only clients use
  5627. them, rather than waiting to download microdescriptors.
  5628. Implements ticket 23827.
  5629. o Minor features (cleanup):
  5630. - Tor now deletes the CookieAuthFile and ExtORPortCookieAuthFile
  5631. when it stops. Closes ticket 23271.
  5632. o Minor features (defensive programming):
  5633. - Most of the functions in Tor that free objects have been replaced
  5634. with macros that free the objects and set the corresponding
  5635. pointers to NULL. This change should help prevent a large class of
  5636. dangling pointer bugs. Closes ticket 24337.
  5637. - Where possible, the tor_free() macro now only evaluates its input
  5638. once. Part of ticket 24337.
  5639. - Check that microdesc ed25519 ids are non-zero in
  5640. node_get_ed25519_id() before returning them. Implements ticket
  5641. 24001, patch by "aruna1234".
  5642. o Minor features (embedding):
  5643. - Tor can now start with a preauthenticated control connection
  5644. created by the process that launched it. This feature is meant for
  5645. use by programs that want to launch and manage a Tor process
  5646. without allowing other programs to manage it as well. For more
  5647. information, see the __OwningControllerFD option documented in
  5648. control-spec.txt. Closes ticket 23900.
  5649. - On most errors that would cause Tor to exit, it now tries to
  5650. return from the tor_main() function, rather than calling the
  5651. system exit() function. Most users won't notice a difference here,
  5652. but it should be significant for programs that run Tor inside
  5653. a separate thread: they should now be able to survive Tor's exit
  5654. conditions rather than having Tor shut down the entire process.
  5655. Closes ticket 23848.
  5656. - Applications that want to embed Tor can now tell Tor not to
  5657. register any of its own POSIX signal handlers, using the
  5658. __DisableSignalHandlers option. Closes ticket 24588.
  5659. o Minor features (fallback directory list):
  5660. - Avoid selecting fallbacks that change their IP addresses too
  5661. often. Select more fallbacks by ignoring the Guard flag, and
  5662. allowing lower cutoffs for the Running and V2Dir flags. Also allow
  5663. a lower bandwidth, and a higher number of fallbacks per operator
  5664. (5% of the list). Implements ticket 24785.
  5665. - Update the fallback whitelist and blacklist based on opt-ins and
  5666. relay changes. Closes tickets 22321, 24678, 22527, 24135,
  5667. and 24695.
  5668. o Minor features (fallback directory mirror configuration):
  5669. - Add a nickname to each fallback in a C comment. This makes it
  5670. easier for operators to find their relays, and allows stem to use
  5671. nicknames to identify fallbacks. Implements ticket 24600.
  5672. - Add a type and version header to the fallback directory mirror
  5673. file. Also add a delimiter to the end of each fallback entry. This
  5674. helps external parsers like stem and Relay Search. Implements
  5675. ticket 24725.
  5676. - Add an extrainfo cache flag for each fallback in a C comment. This
  5677. allows stem to use fallbacks to fetch extra-info documents, rather
  5678. than using authorities. Implements ticket 22759.
  5679. - Add the generateFallbackDirLine.py script for automatically
  5680. generating fallback directory mirror lines from relay fingerprints.
  5681. No more typos! Add the lookupFallbackDirContact.py script for
  5682. automatically looking up operator contact info from relay
  5683. fingerprints. Implements ticket 24706, patch by teor and atagar.
  5684. - Reject any fallback directory mirror that serves an expired
  5685. consensus. Implements ticket 20942, patch by "minik".
  5686. - Remove commas and equals signs from external string inputs to the
  5687. fallback list. This avoids format confusion attacks. Implements
  5688. ticket 24726.
  5689. - Remove the "weight=10" line from fallback directory mirror
  5690. entries. Ticket 24681 will maintain the current fallback weights
  5691. by changing Tor's default fallback weight to 10. Implements
  5692. ticket 24679.
  5693. - Stop logging excessive information about fallback netblocks.
  5694. Implements ticket 24791.
  5695. o Minor features (forward-compatibility):
  5696. - If a relay supports some link authentication protocol that we do
  5697. not recognize, then include that relay's ed25519 key when telling
  5698. other relays to extend to it. Previously, we treated future
  5699. versions as if they were too old to support ed25519 link
  5700. authentication. Closes ticket 20895.
  5701. o Minor features (heartbeat):
  5702. - Add onion service information to our heartbeat logs, displaying
  5703. stats about the activity of configured onion services. Closes
  5704. ticket 24896.
  5705. o Minor features (instrumentation, development):
  5706. - Add the MainloopStats option to allow developers to get
  5707. instrumentation information from the main event loop via the
  5708. heartbeat messages. We hope to use this to improve Tor's behavior
  5709. when it's trying to sleep. Closes ticket 24605.
  5710. o Minor features (log messages):
  5711. - Improve a warning message that happens when we fail to re-parse an
  5712. old router because of an expired certificate. Closes ticket 20020.
  5713. - Make the log more quantitative when we hit MaxMemInQueues
  5714. threshold exposing some values. Closes ticket 24501.
  5715. o Minor features (logging, android):
  5716. - Added support for the Android logging subsystem. Closes
  5717. ticket 24362.
  5718. o Minor features (performance):
  5719. - Support predictive circuit building for onion service circuits
  5720. with multiple layers of guards. Closes ticket 23101.
  5721. - Use stdatomic.h where available, rather than mutexes, to implement
  5722. atomic_counter_t. Closes ticket 23953.
  5723. o Minor features (performance, 32-bit):
  5724. - Improve performance on 32-bit systems by avoiding 64-bit division
  5725. when calculating the timestamp in milliseconds for channel padding
  5726. computations. Implements ticket 24613.
  5727. - Improve performance on 32-bit systems by avoiding 64-bit division
  5728. when timestamping cells and buffer chunks for OOM calculations.
  5729. Implements ticket 24374.
  5730. o Minor features (performance, OSX, iOS):
  5731. - Use the mach_approximate_time() function (when available) to
  5732. implement coarse monotonic time. Having a coarse time function
  5733. should avoid a large number of system calls, and improve
  5734. performance slightly, especially under load. Closes ticket 24427.
  5735. o Minor features (performance, windows):
  5736. - Improve performance on Windows Vista and Windows 7 by adjusting
  5737. TCP send window size according to the recommendation from
  5738. SIO_IDEAL_SEND_BACKLOG_QUERY. Closes ticket 22798. Patch
  5739. from Vort.
  5740. o Major features (relay):
  5741. - Implement an option, ReducedExitPolicy, to allow an Tor exit relay
  5742. operator to use a more reasonable ("reduced") exit policy, rather
  5743. than the default one. If you want to run an exit node without
  5744. thinking too hard about which ports to allow, this one is for you.
  5745. Closes ticket 13605. Patch from Neel Chauhan.
  5746. o Minor features (testing, debugging, embedding):
  5747. - For development purposes, Tor now has a mode in which it runs for
  5748. a few seconds, then stops, and starts again without exiting the
  5749. process. This mode is meant to help us debug various issues with
  5750. ticket 23847. To use this feature, compile with
  5751. --enable-restart-debugging, and set the TOR_DEBUG_RESTART
  5752. environment variable. This is expected to crash a lot, and is
  5753. really meant for developers only. It will likely be removed in a
  5754. future release. Implements ticket 24583.
  5755. o Minor bugfix (network IPv6 test):
  5756. - Tor's test scripts now check if "ping -6 ::1" works when the user
  5757. runs "make test-network-all". Fixes bug 24677; bugfix on
  5758. 0.2.9.3-alpha. Patch by "ffmancera".
  5759. o Minor bugfixes (build, rust):
  5760. - Fix output of autoconf checks to display success messages for Rust
  5761. dependencies and a suitable rustc compiler version. Fixes bug
  5762. 24612; bugfix on 0.3.1.3-alpha.
  5763. - When building with Rust on OSX, link against libresolv, to work
  5764. around the issue at https://github.com/rust-lang/rust/issues/46797.
  5765. Fixes bug 24652; bugfix on 0.3.1.1-alpha.
  5766. - Don't pass the --quiet option to cargo: it seems to suppress some
  5767. errors, which is not what we want to do when building. Fixes bug
  5768. 24518; bugfix on 0.3.1.7.
  5769. - Build correctly when building from outside Tor's source tree with
  5770. the TOR_RUST_DEPENDENCIES option set. Fixes bug 22768; bugfix
  5771. on 0.3.1.7.
  5772. o Minor bugfixes (directory authorities, IPv6):
  5773. - When creating a routerstatus (vote) from a routerinfo (descriptor),
  5774. set the IPv6 address to the unspecified IPv6 address, and
  5775. explicitly initialize the port to zero. Fixes bug 24488; bugfix
  5776. on 0.2.4.1-alpha.
  5777. o Minor bugfixes (fallback directory mirrors):
  5778. - Make updateFallbackDirs.py search harder for python. (Some OSs
  5779. don't put it in /usr/bin.) Fixes bug 24708; bugfix
  5780. on 0.2.8.1-alpha.
  5781. o Minor bugfixes (hibernation, bandwidth accounting, shutdown):
  5782. - When hibernating, close connections normally and allow them to
  5783. flush. Fixes bug 23571; bugfix on 0.2.4.7-alpha. Also fixes
  5784. bug 7267.
  5785. - Do not attempt to launch self-reachability tests when entering
  5786. hibernation. Fixes a case of bug 12062; bugfix on 0.0.9pre5.
  5787. - Resolve several bugs related to descriptor fetching on bridge
  5788. clients with bandwidth accounting enabled. (This combination is
  5789. not recommended!) Fixes a case of bug 12062; bugfix
  5790. on 0.2.0.3-alpha.
  5791. - When hibernating, do not attempt to launch DNS checks. Fixes a
  5792. case of bug 12062; bugfix on 0.1.2.2-alpha.
  5793. - When hibernating, do not try to upload or download descriptors.
  5794. Fixes a case of bug 12062; bugfix on 0.0.9pre5.
  5795. o Minor bugfixes (IPv6, bridges):
  5796. - Tor now always sets IPv6 preferences for bridges. Fixes bug 24573;
  5797. bugfix on 0.2.8.2-alpha.
  5798. - Tor now sets IPv6 address in the routerstatus as well as in the
  5799. router descriptors when updating addresses for a bridge. Closes
  5800. ticket 24572; bugfix on 0.2.4.5-alpha. Patch by "ffmancera".
  5801. o Minor bugfixes (linux seccomp2 sandbox):
  5802. - When running with the sandbox enabled, reload configuration files
  5803. correctly even when %include was used. Previously we would crash.
  5804. Fixes bug 22605; bugfix on 0.3.1. Patch from Daniel Pinto.
  5805. o Minor bugfixes (memory leaks):
  5806. - Avoid possible at-exit memory leaks related to use of Libevent's
  5807. event_base_once() function. (This function tends to leak memory if
  5808. the event_base is closed before the event fires.) Fixes bug 24584;
  5809. bugfix on 0.2.8.1-alpha.
  5810. - Fix a harmless memory leak in tor-resolve. Fixes bug 24582; bugfix
  5811. on 0.2.1.1-alpha.
  5812. o Minor bugfixes (OSX):
  5813. - Don't exit the Tor process if setrlimit() fails to change the file
  5814. limit (which can happen sometimes on some versions of OSX). Fixes
  5815. bug 21074; bugfix on 0.0.9pre5.
  5816. o Minor bugfixes (performance, fragile-hardening):
  5817. - Improve the performance of our consensus-diff application code
  5818. when Tor is built with the --enable-fragile-hardening option set.
  5819. Fixes bug 24826; bugfix on 0.3.1.1-alpha.
  5820. o Minor bugfixes (performance, timeouts):
  5821. - Consider circuits for timeout as soon as they complete a hop. This
  5822. is more accurate than applying the timeout in
  5823. circuit_expire_building() because that function is only called
  5824. once per second, which is now too slow for typical timeouts on the
  5825. current network. Fixes bug 23114; bugfix on 0.2.2.2-alpha.
  5826. - Use onion service circuits (and other circuits longer than 3 hops)
  5827. to calculate a circuit build timeout. Previously, Tor only
  5828. calculated its build timeout based on circuits that planned to be
  5829. exactly 3 hops long. With this change, we include measurements
  5830. from all circuits at the point where they complete their third
  5831. hop. Fixes bug 23100; bugfix on 0.2.2.2-alpha.
  5832. o Minor bugfixes (testing):
  5833. - Give out Exit flags in bootstrapping networks. Fixes bug 24137;
  5834. bugfix on 0.2.3.1-alpha.
  5835. - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
  5836. 25005; bugfix on 0.3.2.7-rc.
  5837. o Code simplification and refactoring:
  5838. - Remove /usr/athena from search path in configure.ac. Closes
  5839. ticket 24363.
  5840. - Remove duplicate code in node_has_curve25519_onion_key() and
  5841. node_get_curve25519_onion_key(), and add a check for a zero
  5842. microdesc curve25519 onion key. Closes ticket 23966, patch by
  5843. "aruna1234" and teor.
  5844. - Rewrite channel_rsa_id_group_set_badness to reduce temporary
  5845. memory allocations with large numbers of OR connections (e.g.
  5846. relays). Closes ticket 24119.
  5847. - Separate the function that deletes ephemeral files when Tor
  5848. stops gracefully.
  5849. - Small changes to Tor's buf_t API to make it suitable for use as a
  5850. general-purpose safe string constructor. Closes ticket 22342.
  5851. - Switch -Wnormalized=id to -Wnormalized=nfkc in configure.ac to
  5852. avoid source code identifier confusion. Closes ticket 24467.
  5853. - The tor_git_revision[] constant no longer needs to be redeclared
  5854. by everything that links against the rest of Tor. Done as part of
  5855. ticket 23845, to simplify our external API.
  5856. - We make extend_info_from_node() use node_get_curve25519_onion_key()
  5857. introduced in ticket 23577 to access the curve25519 public keys
  5858. rather than accessing it directly. Closes ticket 23760. Patch by
  5859. Neel Chauhan.
  5860. - Add a function to log channels' scheduler state changes to aid
  5861. debugging efforts. Closes ticket 24531.
  5862. o Documentation:
  5863. - Add documentation on how to build tor with Rust dependencies
  5864. without having to be online. Closes ticket 22907; bugfix
  5865. on 0.3.0.3-alpha.
  5866. - Clarify the behavior of RelayBandwidth{Rate,Burst} with client
  5867. traffic. Closes ticket 24318.
  5868. - Document that OutboundBindAddress doesn't apply to DNS requests.
  5869. Closes ticket 22145. Patch from Aruna Maurya.
  5870. - Document that operators who run more than one relay or bridge are
  5871. expected to set MyFamily and ContactInfo correctly. Closes
  5872. ticket 24526.
  5873. o Code simplification and refactoring (channels):
  5874. - Remove the incoming and outgoing channel queues. These were never
  5875. used, but still took up a step in our fast path.
  5876. - The majority of the channel unit tests have been rewritten and the
  5877. code coverage has now been raised to 83.6% for channel.c. Closes
  5878. ticket 23709.
  5879. - Remove other dead code from the channel subsystem: All together,
  5880. this cleanup has removed more than 1500 lines of code overall and
  5881. adding very little except for unit test.
  5882. o Code simplification and refactoring (circuit rendezvous):
  5883. - Split the client-side rendezvous circuit lookup into two
  5884. functions: one that returns only established circuits and another
  5885. that returns all kinds of circuits. Closes ticket 23459.
  5886. o Code simplification and refactoring (controller):
  5887. - Make most of the variables in networkstatus_getinfo_by_purpose()
  5888. const. Implements ticket 24489.
  5889. Changes in version 0.3.2.9 - 2018-01-09
  5890. Tor 0.3.2.9 is the first stable release in the 0.3.2 series.
  5891. The 0.3.2 series includes our long-anticipated new onion service
  5892. design, with numerous security features. (For more information, see
  5893. our blog post at https://blog.torproject.org/fall-harvest.) We also
  5894. have a new circuit scheduler algorithm for improved performance on
  5895. relays everywhere (see https://blog.torproject.org/kist-and-tell),
  5896. along with many smaller features and bugfixes.
  5897. Per our stable release policy, we plan to support each stable release
  5898. series for at least the next nine months, or for three months after
  5899. the first stable release of the next series: whichever is longer. If
  5900. you need a release with long-term support, we recommend that you stay
  5901. with the 0.2.9 series.
  5902. Below is a list of the changes since 0.3.2.8-rc. For a list of all
  5903. changes since 0.3.1, see the ReleaseNotes file.
  5904. o Minor features (fallback directory mirrors):
  5905. - The fallback directory list has been re-generated based on the
  5906. current status of the network. Tor uses fallback directories to
  5907. bootstrap when it doesn't yet have up-to-date directory
  5908. information. Closes ticket 24801.
  5909. - Make the default DirAuthorityFallbackRate 0.1, so that clients
  5910. prefer to bootstrap from fallback directory mirrors. This is a
  5911. follow-up to 24679, which removed weights from the default
  5912. fallbacks. Implements ticket 24681.
  5913. o Minor features (geoip):
  5914. - Update geoip and geoip6 to the January 5 2018 Maxmind GeoLite2
  5915. Country database.
  5916. o Minor bugfixes (address selection):
  5917. - When the fascist_firewall_choose_address_ functions don't find a
  5918. reachable address, set the returned address to the null address
  5919. and port. This is a precautionary measure, because some callers do
  5920. not check the return value. Fixes bug 24736; bugfix
  5921. on 0.2.8.2-alpha.
  5922. o Minor bugfixes (compilation):
  5923. - Resolve a few shadowed-variable warnings in the onion service
  5924. code. Fixes bug 24634; bugfix on 0.3.2.1-alpha.
  5925. o Minor bugfixes (portability, msvc):
  5926. - Fix a bug in the bit-counting parts of our timing-wheel code on
  5927. MSVC. (Note that MSVC is still not a supported build platform, due
  5928. to cryptographic timing channel risks.) Fixes bug 24633; bugfix
  5929. on 0.2.9.1-alpha.
  5930. Changes in version 0.3.2.8-rc - 2017-12-21
  5931. Tor 0.3.2.8-rc fixes a pair of bugs in the KIST and KISTLite
  5932. schedulers that had led servers under heavy load to overload their
  5933. outgoing connections. All relay operators running earlier 0.3.2.x
  5934. versions should upgrade. This version also includes a mitigation for
  5935. over-full DESTROY queues leading to out-of-memory conditions: if it
  5936. works, we will soon backport it to earlier release series.
  5937. This is the second release candidate in the 0.3.2 series. If we find
  5938. no new bugs or regression here, then the first stable 0.3.2 release
  5939. will be nearly identical to this.
  5940. o Major bugfixes (KIST, scheduler):
  5941. - The KIST scheduler did not correctly account for data already
  5942. enqueued in each connection's send socket buffer, particularly in
  5943. cases when the TCP/IP congestion window was reduced between
  5944. scheduler calls. This situation lead to excessive per-connection
  5945. buffering in the kernel, and a potential memory DoS. Fixes bug
  5946. 24665; bugfix on 0.3.2.1-alpha.
  5947. o Minor features (geoip):
  5948. - Update geoip and geoip6 to the December 6 2017 Maxmind GeoLite2
  5949. Country database.
  5950. o Minor bugfixes (hidden service v3):
  5951. - Bump hsdir_spread_store parameter from 3 to 4 in order to increase
  5952. the probability of reaching a service for a client missing
  5953. microdescriptors. Fixes bug 24425; bugfix on 0.3.2.1-alpha.
  5954. o Minor bugfixes (memory usage):
  5955. - When queuing DESTROY cells on a channel, only queue the circuit-id
  5956. and reason fields: not the entire 514-byte cell. This fix should
  5957. help mitigate any bugs or attacks that fill up these queues, and
  5958. free more RAM for other uses. Fixes bug 24666; bugfix
  5959. on 0.2.5.1-alpha.
  5960. o Minor bugfixes (scheduler, KIST):
  5961. - Use a sane write limit for KISTLite when writing onto a connection
  5962. buffer instead of using INT_MAX and shoving as much as it can.
  5963. Because the OOM handler cleans up circuit queues, we are better
  5964. off at keeping them in that queue instead of the connection's
  5965. buffer. Fixes bug 24671; bugfix on 0.3.2.1-alpha.
  5966. Changes in version 0.3.2.7-rc - 2017-12-14
  5967. Tor 0.3.2.7-rc fixes various bugs in earlier versions of Tor,
  5968. including some that could affect reliability or correctness.
  5969. This is the first release candidate in the 0.3.2 series. If we find no
  5970. new bugs or regression here, then the first stable 0.3.2. release will
  5971. be nearly identical to this.
  5972. o Major bugfixes (circuit prediction):
  5973. - Fix circuit prediction logic so that a client doesn't treat a port
  5974. as being "handled" by a circuit if that circuit already has
  5975. isolation settings on it. This change should make Tor clients more
  5976. responsive by improving their chances of having a pre-created
  5977. circuit ready for use when a request arrives. Fixes bug 18859;
  5978. bugfix on 0.2.3.3-alpha.
  5979. o Minor features (logging):
  5980. - Provide better warnings when the getrandom() syscall fails. Closes
  5981. ticket 24500.
  5982. o Minor features (portability):
  5983. - Tor now compiles correctly on arm64 with libseccomp-dev installed.
  5984. (It doesn't yet work with the sandbox enabled.) Closes
  5985. ticket 24424.
  5986. o Minor bugfixes (bridge clients, bootstrap):
  5987. - Retry directory downloads when we get our first bridge descriptor
  5988. during bootstrap or while reconnecting to the network. Keep
  5989. retrying every time we get a bridge descriptor, until we have a
  5990. reachable bridge. Fixes part of bug 24367; bugfix on 0.2.0.3-alpha.
  5991. - Stop delaying bridge descriptor fetches when we have cached bridge
  5992. descriptors. Instead, only delay bridge descriptor fetches when we
  5993. have at least one reachable bridge. Fixes part of bug 24367;
  5994. bugfix on 0.2.0.3-alpha.
  5995. - Stop delaying directory fetches when we have cached bridge
  5996. descriptors. Instead, only delay bridge descriptor fetches when
  5997. all our bridges are definitely unreachable. Fixes part of bug
  5998. 24367; bugfix on 0.2.0.3-alpha.
  5999. o Minor bugfixes (compilation):
  6000. - Fix a signed/unsigned comparison warning introduced by our fix to
  6001. TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
  6002. o Minor bugfixes (correctness):
  6003. - Fix several places in our codebase where a C compiler would be
  6004. likely to eliminate a check, based on assuming that undefined
  6005. behavior had not happened elsewhere in the code. These cases are
  6006. usually a sign of redundant checking or dubious arithmetic. Found
  6007. by Georg Koppen using the "STACK" tool from Wang, Zeldovich,
  6008. Kaashoek, and Solar-Lezama. Fixes bug 24423; bugfix on various
  6009. Tor versions.
  6010. o Minor bugfixes (onion service v3):
  6011. - Fix a race where an onion service would launch a new intro circuit
  6012. after closing an old one, but fail to register it before freeing
  6013. the previously closed circuit. This bug was making the service
  6014. unable to find the established intro circuit and thus not upload
  6015. its descriptor, thus making a service unavailable for up to 24
  6016. hours. Fixes bug 23603; bugfix on 0.3.2.1-alpha.
  6017. o Minor bugfixes (scheduler, KIST):
  6018. - Properly set the scheduler state of an unopened channel in the
  6019. KIST scheduler main loop. This prevents a harmless but annoying
  6020. log warning. Fixes bug 24502; bugfix on 0.3.2.4-alpha.
  6021. - Avoid a possible integer overflow when computing the available
  6022. space on the TCP buffer of a channel. This had no security
  6023. implications; but could make KIST allow too many cells on a
  6024. saturated connection. Fixes bug 24590; bugfix on 0.3.2.1-alpha.
  6025. - Downgrade to "info" a harmless warning about the monotonic time
  6026. moving backwards: This can happen on platform not supporting
  6027. monotonic time. Fixes bug 23696; bugfix on 0.3.2.1-alpha.
  6028. Changes in version 0.3.2.6-alpha - 2017-12-01
  6029. This version of Tor is the latest in the 0.3.2 alpha series. It
  6030. includes fixes for several important security issues. All Tor users
  6031. should upgrade to this release, or to one of the other releases coming
  6032. out today.
  6033. o Major bugfixes (security):
  6034. - Fix a denial of service bug where an attacker could use a
  6035. malformed directory object to cause a Tor instance to pause while
  6036. OpenSSL would try to read a passphrase from the terminal. (Tor
  6037. instances run without a terminal, which is the case for most Tor
  6038. packages, are not impacted.) Fixes bug 24246; bugfix on every
  6039. version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
  6040. Found by OSS-Fuzz as testcase 6360145429790720.
  6041. - Fix a denial of service issue where an attacker could crash a
  6042. directory authority using a malformed router descriptor. Fixes bug
  6043. 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
  6044. and CVE-2017-8820.
  6045. - When checking for replays in the INTRODUCE1 cell data for a
  6046. (legacy) onion service, correctly detect replays in the RSA-
  6047. encrypted part of the cell. We were previously checking for
  6048. replays on the entire cell, but those can be circumvented due to
  6049. the malleability of Tor's legacy hybrid encryption. This fix helps
  6050. prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
  6051. 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
  6052. and CVE-2017-8819.
  6053. o Major bugfixes (security, onion service v2):
  6054. - Fix a use-after-free error that could crash v2 Tor onion services
  6055. when they failed to open circuits while expiring introduction
  6056. points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
  6057. also tracked as TROVE-2017-013 and CVE-2017-8823.
  6058. o Major bugfixes (security, relay):
  6059. - When running as a relay, make sure that we never build a path
  6060. through ourselves, even in the case where we have somehow lost the
  6061. version of our descriptor appearing in the consensus. Fixes part
  6062. of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
  6063. as TROVE-2017-012 and CVE-2017-8822.
  6064. - When running as a relay, make sure that we never choose ourselves
  6065. as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
  6066. issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
  6067. o Minor feature (relay statistics):
  6068. - Change relay bandwidth reporting stats interval from 4 hours to 24
  6069. hours in order to reduce the efficiency of guard discovery
  6070. attacks. Fixes ticket 23856.
  6071. o Minor features (directory authority):
  6072. - Add an IPv6 address for the "bastet" directory authority. Closes
  6073. ticket 24394.
  6074. o Minor bugfixes (client):
  6075. - By default, do not enable storage of client-side DNS values. These
  6076. values were unused by default previously, but they should not have
  6077. been cached at all. Fixes bug 24050; bugfix on 0.2.6.3-alpha.
  6078. Changes in version 0.3.1.9 - 2017-12-01:
  6079. Tor 0.3.1.9 backports important security and stability fixes from the
  6080. 0.3.2 development series. All Tor users should upgrade to this
  6081. release, or to another of the releases coming out today.
  6082. o Major bugfixes (security, backport from 0.3.2.6-alpha):
  6083. - Fix a denial of service bug where an attacker could use a
  6084. malformed directory object to cause a Tor instance to pause while
  6085. OpenSSL would try to read a passphrase from the terminal. (Tor
  6086. instances run without a terminal, which is the case for most Tor
  6087. packages, are not impacted.) Fixes bug 24246; bugfix on every
  6088. version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
  6089. Found by OSS-Fuzz as testcase 6360145429790720.
  6090. - Fix a denial of service issue where an attacker could crash a
  6091. directory authority using a malformed router descriptor. Fixes bug
  6092. 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
  6093. and CVE-2017-8820.
  6094. - When checking for replays in the INTRODUCE1 cell data for a
  6095. (legacy) onion service, correctly detect replays in the RSA-
  6096. encrypted part of the cell. We were previously checking for
  6097. replays on the entire cell, but those can be circumvented due to
  6098. the malleability of Tor's legacy hybrid encryption. This fix helps
  6099. prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
  6100. 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
  6101. and CVE-2017-8819.
  6102. o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
  6103. - Fix a use-after-free error that could crash v2 Tor onion services
  6104. when they failed to open circuits while expiring introduction
  6105. points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
  6106. also tracked as TROVE-2017-013 and CVE-2017-8823.
  6107. o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
  6108. - When running as a relay, make sure that we never build a path
  6109. through ourselves, even in the case where we have somehow lost the
  6110. version of our descriptor appearing in the consensus. Fixes part
  6111. of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
  6112. as TROVE-2017-012 and CVE-2017-8822.
  6113. - When running as a relay, make sure that we never choose ourselves
  6114. as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
  6115. issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
  6116. o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
  6117. - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
  6118. making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
  6119. 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
  6120. identifying and finding a workaround to this bug and to Moritz,
  6121. Arthur Edelstein, and Roger for helping to track it down and
  6122. analyze it.
  6123. o Minor features (bridge):
  6124. - Bridges now include notice in their descriptors that they are
  6125. bridges, and notice of their distribution status, based on their
  6126. publication settings. Implements ticket 18329. For more fine-
  6127. grained control of how a bridge is distributed, upgrade to 0.3.2.x
  6128. or later.
  6129. o Minor features (directory authority, backport from 0.3.2.6-alpha):
  6130. - Add an IPv6 address for the "bastet" directory authority. Closes
  6131. ticket 24394.
  6132. o Minor features (geoip):
  6133. - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
  6134. Country database.
  6135. o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
  6136. - Avoid unnecessary calls to directory_fetches_from_authorities() on
  6137. relays, to prevent spurious address resolutions and descriptor
  6138. rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
  6139. bugfix on in 0.2.8.1-alpha.
  6140. o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
  6141. - Fix unused variable warnings in donna's Curve25519 SSE2 code.
  6142. Fixes bug 22895; bugfix on 0.2.7.2-alpha.
  6143. o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
  6144. - When a circuit is marked for close, do not attempt to package any
  6145. cells for channels on that circuit. Previously, we would detect
  6146. this condition lower in the call stack, when we noticed that the
  6147. circuit had no attached channel, and log an annoying message.
  6148. Fixes bug 8185; bugfix on 0.2.5.4-alpha.
  6149. o Minor bugfixes (onion service, backport from 0.3.2.5-alpha):
  6150. - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
  6151. so it matches dir-spec.txt. Fixes bug 24262; bugfix
  6152. on 0.3.1.1-alpha.
  6153. o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
  6154. - Avoid a crash when transitioning from client mode to bridge mode.
  6155. Previously, we would launch the worker threads whenever our
  6156. "public server" mode changed, but not when our "server" mode
  6157. changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
  6158. Changes in version 0.3.0.13 - 2017-12-01
  6159. Tor 0.3.0.13 backports important security and stability bugfixes from
  6160. later Tor releases. All Tor users should upgrade to this release, or
  6161. to another of the releases coming out today.
  6162. Note: the Tor 0.3.0 series will no longer be supported after 26 Jan
  6163. 2018. If you need a release with long-term support, please stick with
  6164. the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
  6165. o Major bugfixes (security, backport from 0.3.2.6-alpha):
  6166. - Fix a denial of service bug where an attacker could use a
  6167. malformed directory object to cause a Tor instance to pause while
  6168. OpenSSL would try to read a passphrase from the terminal. (Tor
  6169. instances run without a terminal, which is the case for most Tor
  6170. packages, are not impacted.) Fixes bug 24246; bugfix on every
  6171. version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
  6172. Found by OSS-Fuzz as testcase 6360145429790720.
  6173. - Fix a denial of service issue where an attacker could crash a
  6174. directory authority using a malformed router descriptor. Fixes bug
  6175. 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
  6176. and CVE-2017-8820.
  6177. - When checking for replays in the INTRODUCE1 cell data for a
  6178. (legacy) onion service, correctly detect replays in the RSA-
  6179. encrypted part of the cell. We were previously checking for
  6180. replays on the entire cell, but those can be circumvented due to
  6181. the malleability of Tor's legacy hybrid encryption. This fix helps
  6182. prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
  6183. 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
  6184. and CVE-2017-8819.
  6185. o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
  6186. - Fix a use-after-free error that could crash v2 Tor onion services
  6187. when they failed to open circuits while expiring introduction
  6188. points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
  6189. also tracked as TROVE-2017-013 and CVE-2017-8823.
  6190. o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
  6191. - When running as a relay, make sure that we never build a path
  6192. through ourselves, even in the case where we have somehow lost the
  6193. version of our descriptor appearing in the consensus. Fixes part
  6194. of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
  6195. as TROVE-2017-012 and CVE-2017-8822.
  6196. - When running as a relay, make sure that we never choose ourselves
  6197. as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
  6198. issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
  6199. o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
  6200. - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
  6201. making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
  6202. 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
  6203. identifying and finding a workaround to this bug and to Moritz,
  6204. Arthur Edelstein, and Roger for helping to track it down and
  6205. analyze it.
  6206. o Minor features (security, windows, backport from 0.3.1.1-alpha):
  6207. - Enable a couple of pieces of Windows hardening: one
  6208. (HeapEnableTerminationOnCorruption) that has been on-by-default
  6209. since Windows 8, and unavailable before Windows 7; and one
  6210. (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
  6211. affect us, but shouldn't do any harm. Closes ticket 21953.
  6212. o Minor features (bridge, backport from 0.3.1.9):
  6213. - Bridges now include notice in their descriptors that they are
  6214. bridges, and notice of their distribution status, based on their
  6215. publication settings. Implements ticket 18329. For more fine-
  6216. grained control of how a bridge is distributed, upgrade to 0.3.2.x
  6217. or later.
  6218. o Minor features (directory authority, backport from 0.3.2.6-alpha):
  6219. - Add an IPv6 address for the "bastet" directory authority. Closes
  6220. ticket 24394.
  6221. o Minor features (geoip):
  6222. - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
  6223. Country database.
  6224. o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
  6225. - Avoid unnecessary calls to directory_fetches_from_authorities() on
  6226. relays, to prevent spurious address resolutions and descriptor
  6227. rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
  6228. bugfix on in 0.2.8.1-alpha.
  6229. o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
  6230. - Fix unused variable warnings in donna's Curve25519 SSE2 code.
  6231. Fixes bug 22895; bugfix on 0.2.7.2-alpha.
  6232. o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
  6233. - When a circuit is marked for close, do not attempt to package any
  6234. cells for channels on that circuit. Previously, we would detect
  6235. this condition lower in the call stack, when we noticed that the
  6236. circuit had no attached channel, and log an annoying message.
  6237. Fixes bug 8185; bugfix on 0.2.5.4-alpha.
  6238. o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
  6239. - Avoid a crash when transitioning from client mode to bridge mode.
  6240. Previously, we would launch the worker threads whenever our
  6241. "public server" mode changed, but not when our "server" mode
  6242. changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
  6243. o Minor bugfixes (testing, backport from 0.3.1.6-rc):
  6244. - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
  6245. bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
  6246. Changes in version 0.2.9.14 - 2017-12-01
  6247. Tor 0.3.0.13 backports important security and stability bugfixes from
  6248. later Tor releases. All Tor users should upgrade to this release, or
  6249. to another of the releases coming out today.
  6250. o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
  6251. - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
  6252. making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
  6253. 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
  6254. identifying and finding a workaround to this bug and to Moritz,
  6255. Arthur Edelstein, and Roger for helping to track it down and
  6256. analyze it.
  6257. o Major bugfixes (security, backport from 0.3.2.6-alpha):
  6258. - Fix a denial of service bug where an attacker could use a
  6259. malformed directory object to cause a Tor instance to pause while
  6260. OpenSSL would try to read a passphrase from the terminal. (Tor
  6261. instances run without a terminal, which is the case for most Tor
  6262. packages, are not impacted.) Fixes bug 24246; bugfix on every
  6263. version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
  6264. Found by OSS-Fuzz as testcase 6360145429790720.
  6265. - Fix a denial of service issue where an attacker could crash a
  6266. directory authority using a malformed router descriptor. Fixes bug
  6267. 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
  6268. and CVE-2017-8820.
  6269. - When checking for replays in the INTRODUCE1 cell data for a
  6270. (legacy) onion service, correctly detect replays in the RSA-
  6271. encrypted part of the cell. We were previously checking for
  6272. replays on the entire cell, but those can be circumvented due to
  6273. the malleability of Tor's legacy hybrid encryption. This fix helps
  6274. prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
  6275. 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
  6276. and CVE-2017-8819.
  6277. o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
  6278. - Fix a use-after-free error that could crash v2 Tor onion services
  6279. when they failed to open circuits while expiring introduction
  6280. points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
  6281. also tracked as TROVE-2017-013 and CVE-2017-8823.
  6282. o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
  6283. - When running as a relay, make sure that we never build a path
  6284. through ourselves, even in the case where we have somehow lost the
  6285. version of our descriptor appearing in the consensus. Fixes part
  6286. of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
  6287. as TROVE-2017-012 and CVE-2017-8822.
  6288. o Minor features (bridge, backport from 0.3.1.9):
  6289. - Bridges now include notice in their descriptors that they are
  6290. bridges, and notice of their distribution status, based on their
  6291. publication settings. Implements ticket 18329. For more fine-
  6292. grained control of how a bridge is distributed, upgrade to 0.3.2.x
  6293. or later.
  6294. o Minor features (directory authority, backport from 0.3.2.6-alpha):
  6295. - Add an IPv6 address for the "bastet" directory authority. Closes
  6296. ticket 24394.
  6297. o Minor features (geoip):
  6298. - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
  6299. Country database.
  6300. o Minor features (security, windows, backport from 0.3.1.1-alpha):
  6301. - Enable a couple of pieces of Windows hardening: one
  6302. (HeapEnableTerminationOnCorruption) that has been on-by-default
  6303. since Windows 8, and unavailable before Windows 7; and one
  6304. (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
  6305. affect us, but shouldn't do any harm. Closes ticket 21953.
  6306. o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
  6307. - Avoid unnecessary calls to directory_fetches_from_authorities() on
  6308. relays, to prevent spurious address resolutions and descriptor
  6309. rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
  6310. bugfix on in 0.2.8.1-alpha.
  6311. o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
  6312. - Fix unused variable warnings in donna's Curve25519 SSE2 code.
  6313. Fixes bug 22895; bugfix on 0.2.7.2-alpha.
  6314. o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
  6315. - When a circuit is marked for close, do not attempt to package any
  6316. cells for channels on that circuit. Previously, we would detect
  6317. this condition lower in the call stack, when we noticed that the
  6318. circuit had no attached channel, and log an annoying message.
  6319. Fixes bug 8185; bugfix on 0.2.5.4-alpha.
  6320. o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
  6321. - Avoid a crash when transitioning from client mode to bridge mode.
  6322. Previously, we would launch the worker threads whenever our
  6323. "public server" mode changed, but not when our "server" mode
  6324. changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
  6325. o Minor bugfixes (testing, backport from 0.3.1.6-rc):
  6326. - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
  6327. bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
  6328. Changes in version 0.2.8.17 - 2017-12-01
  6329. Tor 0.2.8.17 backports important security and stability bugfixes from
  6330. later Tor releases. All Tor users should upgrade to this release, or
  6331. to another of the releases coming out today.
  6332. Note: the Tor 0.2.8 series will no longer be supported after 1 Jan
  6333. 2018. If you need a release with long-term support, please upgrade with
  6334. the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
  6335. o Major bugfixes (security, backport from 0.3.2.6-alpha):
  6336. - Fix a denial of service bug where an attacker could use a
  6337. malformed directory object to cause a Tor instance to pause while
  6338. OpenSSL would try to read a passphrase from the terminal. (Tor
  6339. instances run without a terminal, which is the case for most Tor
  6340. packages, are not impacted.) Fixes bug 24246; bugfix on every
  6341. version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
  6342. Found by OSS-Fuzz as testcase 6360145429790720.
  6343. - When checking for replays in the INTRODUCE1 cell data for a
  6344. (legacy) onion service, correctly detect replays in the RSA-
  6345. encrypted part of the cell. We were previously checking for
  6346. replays on the entire cell, but those can be circumvented due to
  6347. the malleability of Tor's legacy hybrid encryption. This fix helps
  6348. prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
  6349. 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
  6350. and CVE-2017-8819.
  6351. o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
  6352. - Fix a use-after-free error that could crash v2 Tor onion services
  6353. when they failed to open circuits while expiring introduction
  6354. points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
  6355. also tracked as TROVE-2017-013 and CVE-2017-8823.
  6356. o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
  6357. - When running as a relay, make sure that we never build a path through
  6358. ourselves, even in the case where we have somehow lost the version of
  6359. our descriptor appearing in the consensus. Fixes part of bug 21534;
  6360. bugfix on 0.2.0.1-alpha. This issue is also tracked as TROVE-2017-012
  6361. and CVE-2017-8822.
  6362. o Minor features (bridge, backport from 0.3.1.9):
  6363. - Bridges now include notice in their descriptors that they are
  6364. bridges, and notice of their distribution status, based on their
  6365. publication settings. Implements ticket 18329. For more fine-
  6366. grained control of how a bridge is distributed, upgrade to 0.3.2.x
  6367. or later.
  6368. o Minor features (directory authority, backport from 0.3.2.6-alpha):
  6369. - Add an IPv6 address for the "bastet" directory authority. Closes
  6370. ticket 24394.
  6371. o Minor features (geoip):
  6372. - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
  6373. Country database.
  6374. o Minor bugfixes (testing, backport from 0.3.1.6-rc):
  6375. - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
  6376. bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
  6377. Changes in version 0.2.5.16 - 2017-12-01
  6378. Tor 0.2.5.13 backports important security and stability bugfixes from
  6379. later Tor releases. All Tor users should upgrade to this release, or
  6380. to another of the releases coming out today.
  6381. Note: the Tor 0.2.5 series will no longer be supported after 1 May
  6382. 2018. If you need a release with long-term support, please upgrade to
  6383. the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
  6384. o Major bugfixes (security, backport from 0.3.2.6-alpha):
  6385. - Fix a denial of service bug where an attacker could use a
  6386. malformed directory object to cause a Tor instance to pause while
  6387. OpenSSL would try to read a passphrase from the terminal. (Tor
  6388. instances run without a terminal, which is the case for most Tor
  6389. packages, are not impacted.) Fixes bug 24246; bugfix on every
  6390. version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
  6391. Found by OSS-Fuzz as testcase 6360145429790720.
  6392. - When checking for replays in the INTRODUCE1 cell data for a
  6393. (legacy) onion service, correctly detect replays in the RSA-
  6394. encrypted part of the cell. We were previously checking for
  6395. replays on the entire cell, but those can be circumvented due to
  6396. the malleability of Tor's legacy hybrid encryption. This fix helps
  6397. prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
  6398. 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
  6399. and CVE-2017-8819.
  6400. o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
  6401. - When running as a relay, make sure that we never build a path
  6402. through ourselves, even in the case where we have somehow lost the
  6403. version of our descriptor appearing in the consensus. Fixes part
  6404. of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
  6405. as TROVE-2017-012 and CVE-2017-8822.
  6406. o Minor features (bridge, backport from 0.3.1.9):
  6407. - Bridges now include notice in their descriptors that they are
  6408. bridges, and notice of their distribution status, based on their
  6409. publication settings. Implements ticket 18329. For more fine-
  6410. grained control of how a bridge is distributed, upgrade to 0.3.2.x
  6411. or later.
  6412. o Minor features (geoip):
  6413. - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
  6414. Country database.
  6415. Changes in version 0.3.2.5-alpha - 2017-11-22
  6416. Tor 0.3.2.5-alpha is the fifth alpha release in the 0.3.2.x series. It
  6417. fixes several stability and reliability bugs, including a fix for
  6418. intermittent bootstrapping failures that some people have been seeing
  6419. since the 0.3.0.x series.
  6420. Please test this alpha out -- many of these fixes will soon be
  6421. backported to stable Tor versions if no additional bugs are found
  6422. in them.
  6423. o Major bugfixes (bootstrapping):
  6424. - Fetch descriptors aggressively whenever we lack enough to build
  6425. circuits, regardless of how many descriptors we are missing.
  6426. Previously, we would delay launching the fetch when we had fewer
  6427. than 15 missing descriptors, even if some of those descriptors
  6428. were blocking circuits from building. Fixes bug 23985; bugfix on
  6429. 0.1.1.11-alpha. The effects of this bug became worse in
  6430. 0.3.0.3-alpha, when we began treating missing descriptors from our
  6431. primary guards as a reason to delay circuits.
  6432. - Don't try fetching microdescriptors from relays that have failed
  6433. to deliver them in the past. Fixes bug 23817; bugfix
  6434. on 0.3.0.1-alpha.
  6435. o Minor features (directory authority):
  6436. - Make the "Exit" flag assignment only depend on whether the exit
  6437. policy allows connections to ports 80 and 443. Previously relays
  6438. would get the Exit flag if they allowed connections to one of
  6439. these ports and also port 6667. Resolves ticket 23637.
  6440. o Minor features (geoip):
  6441. - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
  6442. Country database.
  6443. o Minor features (linux seccomp2 sandbox):
  6444. - Update the sandbox rules so that they should now work correctly
  6445. with Glibc 2.26. Closes ticket 24315.
  6446. o Minor features (logging):
  6447. - Downgrade a pair of log messages that could occur when an exit's
  6448. resolver gave us an unusual (but not forbidden) response. Closes
  6449. ticket 24097.
  6450. - Improve the message we log when re-enabling circuit build timeouts
  6451. after having received a consensus. Closes ticket 20963.
  6452. o Minor bugfixes (compilation):
  6453. - Fix a memory leak warning in one of the libevent-related
  6454. configuration tests that could occur when manually specifying
  6455. -fsanitize=address. Fixes bug 24279; bugfix on 0.3.0.2-alpha.
  6456. Found and patched by Alex Xu.
  6457. - When detecting OpenSSL on Windows from our configure script, make
  6458. sure to try linking with the ws2_32 library. Fixes bug 23783;
  6459. bugfix on 0.3.2.2-alpha.
  6460. o Minor bugfixes (control port, linux seccomp2 sandbox):
  6461. - Avoid a crash when attempting to use the seccomp2 sandbox together
  6462. with the OwningControllerProcess feature. Fixes bug 24198; bugfix
  6463. on 0.2.5.1-alpha.
  6464. o Minor bugfixes (control port, onion services):
  6465. - Report "FAILED" instead of "UPLOAD_FAILED" "FAILED" for the
  6466. HS_DESC event when a service is not able to upload a descriptor.
  6467. Fixes bug 24230; bugfix on 0.2.7.1-alpha.
  6468. o Minor bugfixes (directory cache):
  6469. - Recover better from empty or corrupt files in the consensus cache
  6470. directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
  6471. - When a consensus diff calculation is only partially successful,
  6472. only record the successful parts as having succeeded. Partial
  6473. success can happen if (for example) one compression method fails
  6474. but the others succeed. Previously we misrecorded all the
  6475. calculations as having succeeded, which would later cause a
  6476. nonfatal assertion failure. Fixes bug 24086; bugfix
  6477. on 0.3.1.1-alpha.
  6478. o Minor bugfixes (logging):
  6479. - Only log once if we notice that KIST support is gone. Fixes bug
  6480. 24158; bugfix on 0.3.2.1-alpha.
  6481. - Suppress a log notice when relay descriptors arrive. We already
  6482. have a bootstrap progress for this so no need to log notice
  6483. everytime tor receives relay descriptors. Microdescriptors behave
  6484. the same. Fixes bug 23861; bugfix on 0.2.8.2-alpha.
  6485. o Minor bugfixes (network layer):
  6486. - When closing a connection via close_connection_immediately(), we
  6487. mark it as "not blocked on bandwidth", to prevent later calls from
  6488. trying to unblock it, and give it permission to read. This fixes a
  6489. backtrace warning that can happen on relays under various
  6490. circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
  6491. o Minor bugfixes (onion services):
  6492. - The introduction circuit was being timed out too quickly while
  6493. waiting for the rendezvous circuit to complete. Keep the intro
  6494. circuit around longer instead of timing out and reopening new ones
  6495. constantly. Fixes bug 23681; bugfix on 0.2.4.8-alpha.
  6496. - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
  6497. so it matches dir-spec.txt. Fixes bug 24262; bugfix
  6498. on 0.3.1.1-alpha.
  6499. - Silence a warning about failed v3 onion descriptor uploads that
  6500. can happen naturally under certain edge cases. Fixes part of bug
  6501. 23662; bugfix on 0.3.2.1-alpha.
  6502. o Minor bugfixes (tests):
  6503. - Fix a memory leak in one of the bridge-distribution test cases.
  6504. Fixes bug 24345; bugfix on 0.3.2.3-alpha.
  6505. - Fix a bug in our fuzzing mock replacement for crypto_pk_checksig(),
  6506. to correctly handle cases where a caller gives it an RSA key of
  6507. under 160 bits. (This is not actually a bug in Tor itself, but
  6508. rather in our fuzzing code.) Fixes bug 24247; bugfix on
  6509. 0.3.0.3-alpha. Found by OSS-Fuzz as issue 4177.
  6510. o Documentation:
  6511. - Add notes in man page regarding OS support for the various
  6512. scheduler types. Attempt to use less jargon in the scheduler
  6513. section. Closes ticket 24254.
  6514. Changes in version 0.3.2.4-alpha - 2017-11-08
  6515. Tor 0.3.2.4-alpha is the fourth alpha release in the 0.3.2.x series.
  6516. It fixes several stability and reliability bugs, especially including
  6517. a major reliability issue that has been plaguing fast exit relays in
  6518. recent months.
  6519. o Major bugfixes (exit relays, DNS):
  6520. - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
  6521. making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
  6522. 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
  6523. identifying and finding a workaround to this bug and to Moritz,
  6524. Arthur Edelstein, and Roger for helping to track it down and
  6525. analyze it.
  6526. o Major bugfixes (scheduler, channel):
  6527. - Stop processing scheduled channels if they closed while flushing
  6528. cells. This can happen if the write on the connection fails
  6529. leading to the channel being closed while in the scheduler loop.
  6530. Fixes bug 23751; bugfix on 0.3.2.1-alpha.
  6531. o Minor features (logging, scheduler):
  6532. - Introduce a SCHED_BUG() function to log extra information about
  6533. the scheduler state if we ever catch a bug in the scheduler.
  6534. Closes ticket 23753.
  6535. o Minor features (removed deprecations):
  6536. - The ClientDNSRejectInternalAddresses flag can once again be set in
  6537. non-testing Tor networks, so long as they do not use the default
  6538. directory authorities. This change also removes the deprecation of
  6539. this flag from 0.2.9.2-alpha. Closes ticket 21031.
  6540. o Minor features (testing):
  6541. - Our fuzzing tests now test the encrypted portions of v3 onion
  6542. service descriptors. Implements more of 21509.
  6543. o Minor bugfixes (directory client):
  6544. - On failure to download directory information, delay retry attempts
  6545. by a random amount based on the "decorrelated jitter" algorithm.
  6546. Our previous delay algorithm tended to produce extra-long delays
  6547. too easily. Fixes bug 23816; bugfix on 0.2.9.1-alpha.
  6548. o Minor bugfixes (IPv6, v3 single onion services):
  6549. - Remove buggy code for IPv6-only v3 single onion services, and
  6550. reject attempts to configure them. This release supports IPv4,
  6551. dual-stack, and IPv6-only v3 onion services; and IPv4 and dual-
  6552. stack v3 single onion services. Fixes bug 23820; bugfix
  6553. on 0.3.2.1-alpha.
  6554. o Minor bugfixes (logging, relay):
  6555. - Give only a protocol warning when the ed25519 key is not
  6556. consistent between the descriptor and microdescriptor of a relay.
  6557. This can happen, for instance, if the relay has been flagged
  6558. NoEdConsensus. Fixes bug 24025; bugfix on 0.3.2.1-alpha.
  6559. o Minor bugfixes (manpage, onion service):
  6560. - Document that the HiddenServiceNumIntroductionPoints option is
  6561. 0-10 for v2 services and 0-20 for v3 services. Fixes bug 24115;
  6562. bugfix on 0.3.2.1-alpha.
  6563. o Minor bugfixes (memory leaks):
  6564. - Fix a minor memory leak at exit in the KIST scheduler. This bug
  6565. should have no user-visible impact. Fixes bug 23774; bugfix
  6566. on 0.3.2.1-alpha.
  6567. - Fix a memory leak when decrypting a badly formatted v3 onion
  6568. service descriptor. Fixes bug 24150; bugfix on 0.3.2.1-alpha.
  6569. Found by OSS-Fuzz; this is OSS-Fuzz issue 3994.
  6570. o Minor bugfixes (onion services):
  6571. - Cache some needed onion service client information instead of
  6572. constantly computing it over and over again. Fixes bug 23623;
  6573. bugfix on 0.3.2.1-alpha.
  6574. - Properly retry HSv3 descriptor fetches when missing required
  6575. directory information. Fixes bug 23762; bugfix on 0.3.2.1-alpha.
  6576. o Minor bugfixes (path selection):
  6577. - When selecting relays by bandwidth, avoid a rounding error that
  6578. could sometimes cause load to be imbalanced incorrectly.
  6579. Previously, we would always round upwards; now, we round towards
  6580. the nearest integer. This had the biggest effect when a relay's
  6581. weight adjustments should have given it weight 0, but it got
  6582. weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
  6583. - When calculating the fraction of nodes that have descriptors, and
  6584. all nodes in the network have zero bandwidths, count the number of
  6585. nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
  6586. - Actually log the total bandwidth in compute_weighted_bandwidths().
  6587. Fixes bug 24170; bugfix on 0.2.4.3-alpha.
  6588. o Minor bugfixes (relay, crash):
  6589. - Avoid a crash when transitioning from client mode to bridge mode.
  6590. Previously, we would launch the worker threads whenever our
  6591. "public server" mode changed, but not when our "server" mode
  6592. changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
  6593. o Minor bugfixes (testing):
  6594. - Fix a spurious fuzzing-only use of an uninitialized value. Found
  6595. by Brian Carpenter. Fixes bug 24082; bugfix on 0.3.0.3-alpha.
  6596. - Test that IPv6-only clients can use microdescriptors when running
  6597. "make test-network-all". Requires chutney master 61c28b9 or later.
  6598. Closes ticket 24109.
  6599. Changes in version 0.3.2.3-alpha - 2017-10-27
  6600. Tor 0.3.2.3-alpha is the third release in the 0.3.2 series. It fixes
  6601. numerous small bugs in earlier versions of 0.3.2.x, and adds a new
  6602. directory authority, Bastet.
  6603. o Directory authority changes:
  6604. - Add "Bastet" as a ninth directory authority to the default list.
  6605. Closes ticket 23910.
  6606. - The directory authority "Longclaw" has changed its IP address.
  6607. Closes ticket 23592.
  6608. o Minor features (bridge):
  6609. - Bridge relays can now set the BridgeDistribution config option to
  6610. add a "bridge-distribution-request" line to their bridge
  6611. descriptor, which tells BridgeDB how they'd like their bridge
  6612. address to be given out. (Note that as of Oct 2017, BridgeDB does
  6613. not yet implement this feature.) As a side benefit, this feature
  6614. provides a way to distinguish bridge descriptors from non-bridge
  6615. descriptors. Implements tickets 18329.
  6616. o Minor features (client, entry guards):
  6617. - Improve log messages when missing descriptors for primary guards.
  6618. Resolves ticket 23670.
  6619. o Minor features (geoip):
  6620. - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
  6621. Country database.
  6622. o Minor bugfixes (bridge):
  6623. - Overwrite the bridge address earlier in the process of retrieving
  6624. its descriptor, to make sure we reach it on the configured
  6625. address. Fixes bug 20532; bugfix on 0.2.0.10-alpha.
  6626. o Minor bugfixes (documentation):
  6627. - Document better how to read gcov, and what our gcov postprocessing
  6628. scripts do. Fixes bug 23739; bugfix on 0.2.9.1-alpha.
  6629. o Minor bugfixes (entry guards):
  6630. - Tor now updates its guard state when it reads a consensus
  6631. regardless of whether it's missing descriptors. That makes tor use
  6632. its primary guards to fetch descriptors in some edge cases where
  6633. it would previously have used fallback directories. Fixes bug
  6634. 23862; bugfix on 0.3.0.1-alpha.
  6635. o Minor bugfixes (hidden service client):
  6636. - When handling multiple SOCKS request for the same .onion address,
  6637. only fetch the service descriptor once.
  6638. - When a descriptor fetch fails with a non-recoverable error, close
  6639. all pending SOCKS requests for that .onion. Fixes bug 23653;
  6640. bugfix on 0.3.2.1-alpha.
  6641. o Minor bugfixes (hidden service):
  6642. - Always regenerate missing hidden service public key files. Prior
  6643. to this, if the public key was deleted from disk, it wouldn't get
  6644. recreated. Fixes bug 23748; bugfix on 0.3.2.2-alpha. Patch
  6645. from "cathugger".
  6646. - Make sure that we have a usable ed25519 key when the intro point
  6647. relay supports ed25519 link authentication. Fixes bug 24002;
  6648. bugfix on 0.3.2.1-alpha.
  6649. o Minor bugfixes (hidden service, v2):
  6650. - When reloading configured hidden services, copy all information
  6651. from the old service object. Previously, some data was omitted,
  6652. causing delays in descriptor upload, and other bugs. Fixes bug
  6653. 23790; bugfix on 0.2.1.9-alpha.
  6654. o Minor bugfixes (memory safety, defensive programming):
  6655. - Clear the target address when node_get_prim_orport() returns
  6656. early. Fixes bug 23874; bugfix on 0.2.8.2-alpha.
  6657. o Minor bugfixes (relay):
  6658. - Avoid a BUG warning when receiving a dubious CREATE cell while an
  6659. option transition is in progress. Fixes bug 23952; bugfix
  6660. on 0.3.2.1-alpha.
  6661. o Minor bugfixes (testing):
  6662. - Adjust the GitLab CI configuration to more closely match that of
  6663. Travis CI. Fixes bug 23757; bugfix on 0.3.2.2-alpha.
  6664. - Prevent scripts/test/coverage from attempting to move gcov output
  6665. to the root directory. Fixes bug 23741; bugfix on 0.2.5.1-alpha.
  6666. - When running unit tests as root, skip a test that would fail
  6667. because it expects a permissions error. This affects some
  6668. continuous integration setups. Fixes bug 23758; bugfix
  6669. on 0.3.2.2-alpha.
  6670. - Stop unconditionally mirroring the tor repository in GitLab CI.
  6671. This prevented developers from enabling GitLab CI on master. Fixes
  6672. bug 23755; bugfix on 0.3.2.2-alpha.
  6673. - Fix the hidden service v3 descriptor decoding fuzzing to use the
  6674. latest decoding API correctly. Fixes bug 21509; bugfix
  6675. on 0.3.2.1-alpha.
  6676. o Minor bugfixes (warnings):
  6677. - When we get an HTTP request on a SOCKS port, tell the user about
  6678. the new HTTPTunnelPort option. Previously, we would give a "Tor is
  6679. not an HTTP Proxy" message, which stopped being true when
  6680. HTTPTunnelPort was introduced. Fixes bug 23678; bugfix
  6681. on 0.3.2.1-alpha.
  6682. Changes in version 0.2.5.15 - 2017-10-25
  6683. Tor 0.2.5.15 backports a collection of bugfixes from later Tor release
  6684. series. It also adds a new directory authority, Bastet.
  6685. Note: the Tor 0.2.5 series will no longer be supported after 1 May
  6686. 2018. If you need a release with long-term support, please upgrade to
  6687. the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
  6688. o Directory authority changes:
  6689. - Add "Bastet" as a ninth directory authority to the default list.
  6690. Closes ticket 23910.
  6691. - The directory authority "Longclaw" has changed its IP address.
  6692. Closes ticket 23592.
  6693. o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
  6694. - Avoid an assertion failure bug affecting our implementation of
  6695. inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
  6696. handling of "0xx" differs from what we had expected. Fixes bug
  6697. 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
  6698. o Minor features (geoip):
  6699. - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
  6700. Country database.
  6701. o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
  6702. - Fix a memset() off the end of an array when packing cells. This
  6703. bug should be harmless in practice, since the corrupted bytes are
  6704. still in the same structure, and are always padding bytes,
  6705. ignored, or immediately overwritten, depending on compiler
  6706. behavior. Nevertheless, because the memset()'s purpose is to make
  6707. sure that any other cell-handling bugs can't expose bytes to the
  6708. network, we need to fix it. Fixes bug 22737; bugfix on
  6709. 0.2.4.11-alpha. Fixes CID 1401591.
  6710. o Build features (backport from 0.3.1.5-alpha):
  6711. - Tor's repository now includes a Travis Continuous Integration (CI)
  6712. configuration file (.travis.yml). This is meant to help new
  6713. developers and contributors who fork Tor to a Github repository be
  6714. better able to test their changes, and understand what we expect
  6715. to pass. To use this new build feature, you must fork Tor to your
  6716. Github account, then go into the "Integrations" menu in the
  6717. repository settings for your fork and enable Travis, then push
  6718. your changes. Closes ticket 22636.
  6719. Changes in version 0.2.8.16 - 2017-10-25
  6720. Tor 0.2.8.16 backports a collection of bugfixes from later Tor release
  6721. series, including a bugfix for a crash issue that had affected relays
  6722. under memory pressure. It also adds a new directory authority, Bastet.
  6723. Note: the Tor 0.2.8 series will no longer be supported after 1 Jan
  6724. 2018. If you need a release with long-term support, please stick with
  6725. the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
  6726. o Directory authority changes:
  6727. - Add "Bastet" as a ninth directory authority to the default list.
  6728. Closes ticket 23910.
  6729. - The directory authority "Longclaw" has changed its IP address.
  6730. Closes ticket 23592.
  6731. o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
  6732. - Fix a timing-based assertion failure that could occur when the
  6733. circuit out-of-memory handler freed a connection's output buffer.
  6734. Fixes bug 23690; bugfix on 0.2.6.1-alpha.
  6735. o Minor features (directory authorities, backport from 0.3.2.2-alpha):
  6736. - Remove longclaw's IPv6 address, as it will soon change. Authority
  6737. IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
  6738. 3/8 directory authorities with IPv6 addresses, but there are also
  6739. 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
  6740. o Minor features (geoip):
  6741. - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
  6742. Country database.
  6743. Changes in version 0.2.9.13 - 2017-10-25
  6744. Tor 0.2.9.13 backports a collection of bugfixes from later Tor release
  6745. series, including a bugfix for a crash issue that had affected relays
  6746. under memory pressure. It also adds a new directory authority, Bastet.
  6747. o Directory authority changes:
  6748. - Add "Bastet" as a ninth directory authority to the default list.
  6749. Closes ticket 23910.
  6750. - The directory authority "Longclaw" has changed its IP address.
  6751. Closes ticket 23592.
  6752. o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
  6753. - Fix a timing-based assertion failure that could occur when the
  6754. circuit out-of-memory handler freed a connection's output buffer.
  6755. Fixes bug 23690; bugfix on 0.2.6.1-alpha.
  6756. o Minor features (directory authorities, backport from 0.3.2.2-alpha):
  6757. - Remove longclaw's IPv6 address, as it will soon change. Authority
  6758. IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
  6759. 3/8 directory authorities with IPv6 addresses, but there are also
  6760. 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
  6761. o Minor features (geoip):
  6762. - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
  6763. Country database.
  6764. o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha):
  6765. - When a directory authority rejects a descriptor or extrainfo with
  6766. a given digest, mark that digest as undownloadable, so that we do
  6767. not attempt to download it again over and over. We previously
  6768. tried to avoid downloading such descriptors by other means, but we
  6769. didn't notice if we accidentally downloaded one anyway. This
  6770. behavior became problematic in 0.2.7.2-alpha, when authorities
  6771. began pinning Ed25519 keys. Fixes bug 22349; bugfix
  6772. on 0.2.1.19-alpha.
  6773. o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
  6774. - Clear the address when node_get_prim_orport() returns early.
  6775. Fixes bug 23874; bugfix on 0.2.8.2-alpha.
  6776. o Minor bugfixes (Windows service, backport from 0.3.1.6-rc):
  6777. - When running as a Windows service, set the ID of the main thread
  6778. correctly. Failure to do so made us fail to send log messages to
  6779. the controller in 0.2.1.16-rc, slowed down controller event
  6780. delivery in 0.2.7.3-rc and later, and crash with an assertion
  6781. failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
  6782. Patch and diagnosis from "Vort".
  6783. Changes in version 0.3.0.12 - 2017-10-25
  6784. Tor 0.3.0.12 backports a collection of bugfixes from later Tor release
  6785. series, including a bugfix for a crash issue that had affected relays
  6786. under memory pressure. It also adds a new directory authority, Bastet.
  6787. Note: the Tor 0.3.0 series will no longer be supported after 26 Jan
  6788. 2018. If you need a release with long-term support, please stick with
  6789. the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
  6790. o Directory authority changes:
  6791. - Add "Bastet" as a ninth directory authority to the default list.
  6792. Closes ticket 23910.
  6793. - The directory authority "Longclaw" has changed its IP address.
  6794. Closes ticket 23592.
  6795. o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
  6796. - Fix a timing-based assertion failure that could occur when the
  6797. circuit out-of-memory handler freed a connection's output buffer.
  6798. Fixes bug 23690; bugfix on 0.2.6.1-alpha.
  6799. o Minor features (directory authorities, backport from 0.3.2.2-alpha):
  6800. - Remove longclaw's IPv6 address, as it will soon change. Authority
  6801. IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
  6802. 3/8 directory authorities with IPv6 addresses, but there are also
  6803. 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
  6804. o Minor features (geoip):
  6805. - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
  6806. Country database.
  6807. o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha):
  6808. - When a directory authority rejects a descriptor or extrainfo with
  6809. a given digest, mark that digest as undownloadable, so that we do
  6810. not attempt to download it again over and over. We previously
  6811. tried to avoid downloading such descriptors by other means, but we
  6812. didn't notice if we accidentally downloaded one anyway. This
  6813. behavior became problematic in 0.2.7.2-alpha, when authorities
  6814. began pinning Ed25519 keys. Fixes bug 22349; bugfix
  6815. on 0.2.1.19-alpha.
  6816. o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha):
  6817. - Avoid a possible double close of a circuit by the intro point on
  6818. error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
  6819. bugfix on 0.3.0.1-alpha.
  6820. o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
  6821. - Clear the address when node_get_prim_orport() returns early.
  6822. Fixes bug 23874; bugfix on 0.2.8.2-alpha.
  6823. o Minor bugfixes (Windows service, backport from 0.3.1.6-rc):
  6824. - When running as a Windows service, set the ID of the main thread
  6825. correctly. Failure to do so made us fail to send log messages to
  6826. the controller in 0.2.1.16-rc, slowed down controller event
  6827. delivery in 0.2.7.3-rc and later, and crash with an assertion
  6828. failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
  6829. Patch and diagnosis from "Vort".
  6830. Changes in version 0.3.1.8 - 2017-10-25
  6831. Tor 0.3.1.8 is the second stable release in the 0.3.1 series.
  6832. It includes several bugfixes, including a bugfix for a crash issue
  6833. that had affected relays under memory pressure. It also adds
  6834. a new directory authority, Bastet.
  6835. o Directory authority changes:
  6836. - Add "Bastet" as a ninth directory authority to the default list.
  6837. Closes ticket 23910.
  6838. - The directory authority "Longclaw" has changed its IP address.
  6839. Closes ticket 23592.
  6840. o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
  6841. - Fix a timing-based assertion failure that could occur when the
  6842. circuit out-of-memory handler freed a connection's output buffer.
  6843. Fixes bug 23690; bugfix on 0.2.6.1-alpha.
  6844. o Minor features (directory authorities, backport from 0.3.2.2-alpha):
  6845. - Remove longclaw's IPv6 address, as it will soon change. Authority
  6846. IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
  6847. 3/8 directory authorities with IPv6 addresses, but there are also
  6848. 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
  6849. o Minor features (geoip):
  6850. - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
  6851. Country database.
  6852. o Minor bugfixes (compilation, backport from 0.3.2.2-alpha):
  6853. - Fix a compilation warning when building with zstd support on
  6854. 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found
  6855. and fixed by Andreas Stieger.
  6856. o Minor bugfixes (compression, backport from 0.3.2.2-alpha):
  6857. - Handle a pathological case when decompressing Zstandard data when
  6858. the output buffer size is zero. Fixes bug 23551; bugfix
  6859. on 0.3.1.1-alpha.
  6860. o Minor bugfixes (directory authority, backport from 0.3.2.1-alpha):
  6861. - Remove the length limit on HTTP status lines that authorities can
  6862. send in their replies. Fixes bug 23499; bugfix on 0.3.1.6-rc.
  6863. o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha):
  6864. - Avoid a possible double close of a circuit by the intro point on
  6865. error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
  6866. bugfix on 0.3.0.1-alpha.
  6867. o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
  6868. - Clear the address when node_get_prim_orport() returns early.
  6869. Fixes bug 23874; bugfix on 0.2.8.2-alpha.
  6870. o Minor bugfixes (unit tests, backport from 0.3.2.2-alpha):
  6871. - Fix additional channelpadding unit test failures by using mocked
  6872. time instead of actual time for all tests. Fixes bug 23608; bugfix
  6873. on 0.3.1.1-alpha.
  6874. Changes in version 0.3.2.2-alpha - 2017-09-29
  6875. Tor 0.3.2.2-alpha is the second release in the 0.3.2 series. This
  6876. release fixes several minor bugs in the new scheduler and next-
  6877. generation onion services; both features were newly added in the 0.3.2
  6878. series. Other fixes in this alpha include several fixes for non-fatal
  6879. tracebacks which would appear in logs.
  6880. With the aim to stabilise the 0.3.2 series by 15 December 2017, this
  6881. alpha does not contain any substantial new features. Minor features
  6882. include better testing and logging.
  6883. The following comprises the complete list of changes included
  6884. in 0.3.2.2-alpha:
  6885. o Major bugfixes (relay, crash, assertion failure):
  6886. - Fix a timing-based assertion failure that could occur when the
  6887. circuit out-of-memory handler freed a connection's output buffer.
  6888. Fixes bug 23690; bugfix on 0.2.6.1-alpha.
  6889. o Major bugfixes (scheduler):
  6890. - If a channel is put into the scheduler's pending list, then it
  6891. starts closing, and then if the scheduler runs before it finishes
  6892. closing, the scheduler will get stuck trying to flush its cells
  6893. while the lower layers refuse to cooperate. Fix that race
  6894. condition by giving the scheduler an escape method. Fixes bug
  6895. 23676; bugfix on 0.3.2.1-alpha.
  6896. o Minor features (build, compilation):
  6897. - The "check-changes" feature is now part of the "make check" tests;
  6898. we'll use it to try to prevent misformed changes files from
  6899. accumulating. Closes ticket 23564.
  6900. - Tor builds should now fail if there are any mismatches between the
  6901. C type representing a configuration variable and the C type the
  6902. data-driven parser uses to store a value there. Previously, we
  6903. needed to check these by hand, which sometimes led to mistakes.
  6904. Closes ticket 23643.
  6905. o Minor features (directory authorities):
  6906. - Remove longclaw's IPv6 address, as it will soon change. Authority
  6907. IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
  6908. 3/8 directory authorities with IPv6 addresses, but there are also
  6909. 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
  6910. o Minor features (hidden service, circuit, logging):
  6911. - Improve logging of many callsite in the circuit subsystem to print
  6912. the circuit identifier(s).
  6913. - Log when we cleanup an intro point from a service so we know when
  6914. and for what reason it happened. Closes ticket 23604.
  6915. o Minor features (logging):
  6916. - Log more circuit information whenever we are about to try to
  6917. package a relay cell on a circuit with a nonexistent n_chan.
  6918. Attempt to diagnose ticket 8185.
  6919. - Improve info-level log identification of particular circuits, to
  6920. help with debugging. Closes ticket 23645.
  6921. o Minor features (relay):
  6922. - When choosing which circuits can be expired as unused, consider
  6923. circuits from clients even if those clients used regular CREATE
  6924. cells to make them; and do not consider circuits from relays even
  6925. if they were made with CREATE_FAST. Part of ticket 22805.
  6926. o Minor features (robustness):
  6927. - Change several fatal assertions when flushing buffers into non-
  6928. fatal assertions, to prevent any recurrence of 23690.
  6929. o Minor features (spec conformance, bridge, diagnostic):
  6930. - When handling the USERADDR command on an ExtOrPort, warn when the
  6931. transports provides a USERADDR with no port. In a future version,
  6932. USERADDR commands of this format may be rejected. Detects problems
  6933. related to ticket 23080.
  6934. o Minor features (testing):
  6935. - Add a unit test to make sure that our own generated platform
  6936. string will be accepted by directory authorities. Closes
  6937. ticket 22109.
  6938. o Minor bugfixes (bootstrapping):
  6939. - When warning about state file clock skew, report the correct
  6940. direction for the detected skew. Fixes bug 23606; bugfix
  6941. on 0.2.8.1-alpha.
  6942. - Avoid an assertion failure when logging a state file clock skew
  6943. very early in bootstrapping. Fixes bug 23607; bugfix
  6944. on 0.3.2.1-alpha.
  6945. o Minor bugfixes (build, compilation):
  6946. - Fix a compilation warning when building with zstd support on
  6947. 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found
  6948. and fixed by Andreas Stieger.
  6949. - When searching for OpenSSL, don't accept any OpenSSL library that
  6950. lacks TLSv1_1_method(): Tor doesn't build with those versions.
  6951. Additionally, look in /usr/local/opt/openssl, if it's present.
  6952. These changes together repair the default build on OSX systems
  6953. with Homebrew installed. Fixes bug 23602; bugfix on 0.2.7.2-alpha.
  6954. o Minor bugfixes (compression):
  6955. - Handle a pathological case when decompressing Zstandard data when
  6956. the output buffer size is zero. Fixes bug 23551; bugfix
  6957. on 0.3.1.1-alpha.
  6958. o Minor bugfixes (documentation):
  6959. - Fix manpage to not refer to the obsolete (and misspelled)
  6960. UseEntryGuardsAsDirectoryGuards parameter in the description of
  6961. NumDirectoryGuards. Fixes bug 23611; bugfix on 0.2.4.8-alpha.
  6962. o Minor bugfixes (hidden service v3):
  6963. - Don't log an assertion failure when we can't find the right
  6964. information to extend to an introduction point. In rare cases,
  6965. this could happen, causing a warning, even though tor would
  6966. recover gracefully. Fixes bug 23159; bugfix on 0.3.2.1-alpha.
  6967. - Pad RENDEZVOUS cell up to the size of the legacy cell which is
  6968. much bigger so the rendezvous point can't distinguish which hidden
  6969. service protocol is being used. Fixes bug 23420; bugfix
  6970. on 0.3.2.1-alpha.
  6971. o Minor bugfixes (hidden service, relay):
  6972. - Avoid a possible double close of a circuit by the intro point on
  6973. error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
  6974. bugfix on 0.3.0.1-alpha.
  6975. o Minor bugfixes (logging, relay shutdown, annoyance):
  6976. - When a circuit is marked for close, do not attempt to package any
  6977. cells for channels on that circuit. Previously, we would detect
  6978. this condition lower in the call stack, when we noticed that the
  6979. circuit had no attached channel, and log an annoying message.
  6980. Fixes bug 8185; bugfix on 0.2.5.4-alpha.
  6981. o Minor bugfixes (scheduler):
  6982. - When switching schedulers due to a consensus change, we didn't
  6983. give the new scheduler a chance to react to the consensus. Fix
  6984. that. Fixes bug 23537; bugfix on 0.3.2.1-alpha.
  6985. - Make the KISTSchedRunInterval option a non negative value. With
  6986. this, the way to disable KIST through the consensus is to set it
  6987. to 0. Fixes bug 23539; bugfix on 0.3.2.1-alpha.
  6988. - Only notice log the selected scheduler when we switch scheduler
  6989. types. Fixes bug 23552; bugfix on 0.3.2.1-alpha.
  6990. - Avoid a compilation warning on macOS in scheduler_ev_add() caused
  6991. by a different tv_usec data type. Fixes bug 23575; bugfix
  6992. on 0.3.2.1-alpha.
  6993. - Make a hard exit if tor is unable to pick a scheduler which can
  6994. happen if the user specifies a scheduler type that is not
  6995. supported and not other types in Schedulers. Fixes bug 23581;
  6996. bugfix on 0.3.2.1-alpha.
  6997. - Properly initialize the scheduler last run time counter so it is
  6998. not 0 at the first tick. Fixes bug 23696; bugfix on 0.3.2.1-alpha.
  6999. o Minor bugfixes (testing):
  7000. - Capture and detect several "Result does not fit" warnings in unit
  7001. tests on platforms with 32-bit time_t. Fixes bug 21800; bugfix
  7002. on 0.2.9.3-alpha.
  7003. - Fix additional channelpadding unit test failures by using mocked
  7004. time instead of actual time for all tests. Fixes bug 23608; bugfix
  7005. on 0.3.1.1-alpha.
  7006. - The removal of some old scheduler options caused some tests to
  7007. fail on BSD systems. Assume current behavior is correct and make
  7008. the tests pass again. Fixes bug 23566; bugfix on 0.3.2.1-alpha.
  7009. o Code simplification and refactoring:
  7010. - Remove various ways of testing circuits and connections for
  7011. "clientness"; instead, favor channel_is_client(). Part of
  7012. ticket 22805.
  7013. o Deprecated features:
  7014. - The ReachableDirAddresses and ClientPreferIPv6DirPort options are
  7015. now deprecated; they do not apply to relays, and they have had no
  7016. effect on clients since 0.2.8.x. Closes ticket 19704.
  7017. o Documentation:
  7018. - HiddenServiceVersion man page entry wasn't mentioning the now
  7019. supported version 3. Fixes ticket 23580; bugfix on 0.3.2.1-alpha.
  7020. - Clarify that the Address option is entirely about setting an
  7021. advertised IPv4 address. Closes ticket 18891.
  7022. - Clarify the manpage's use of the term "address" to clarify what
  7023. kind of address is intended. Closes ticket 21405.
  7024. - Document that onion service subdomains are allowed, and ignored.
  7025. Closes ticket 18736.
  7026. Changes in version 0.3.2.1-alpha - 2017-09-18
  7027. Tor 0.3.2.1-alpha is the first release in the 0.3.2.x series. It
  7028. includes support for our next-generation ("v3") onion service
  7029. protocol, and adds a new circuit scheduler for more responsive
  7030. forwarding decisions from relays. There are also numerous other small
  7031. features and bugfixes here.
  7032. Below are the changes since Tor 0.3.1.7.
  7033. o Major feature (scheduler, channel):
  7034. - Tor now uses new schedulers to decide which circuits should
  7035. deliver cells first, in order to improve congestion at relays. The
  7036. first type is called "KIST" ("Kernel Informed Socket Transport"),
  7037. and is only available on Linux-like systems: it uses feedback from
  7038. the kernel to prevent the kernel's TCP buffers from growing too
  7039. full. The second new scheduler type is called "KISTLite": it
  7040. behaves the same as KIST, but runs on systems without kernel
  7041. support for inspecting TCP implementation details. The old
  7042. scheduler is still available, under the name "Vanilla". To change
  7043. the default scheduler preference order, use the new "Schedulers"
  7044. option. (The default preference order is "KIST,KISTLite,Vanilla".)
  7045. Matt Traudt implemented KIST, based on research by Rob Jansen,
  7046. John Geddes, Christ Wacek, Micah Sherr, and Paul Syverson. For
  7047. more information, see the design paper at
  7048. http://www.robgjansen.com/publications/kist-sec2014.pdf and the
  7049. followup implementation paper at https://arxiv.org/abs/1709.01044.
  7050. Closes ticket 12541.
  7051. o Major features (next-generation onion services):
  7052. - Tor now supports the next-generation onion services protocol for
  7053. clients and services! As part of this release, the core of
  7054. proposal 224 has been implemented and is available for
  7055. experimentation and testing by our users. This newer version of
  7056. onion services ("v3") features many improvements over the legacy
  7057. system, including:
  7058. a) Better crypto (replaced SHA1/DH/RSA1024
  7059. with SHA3/ed25519/curve25519)
  7060. b) Improved directory protocol, leaking much less information to
  7061. directory servers.
  7062. c) Improved directory protocol, with smaller surface for
  7063. targeted attacks.
  7064. d) Better onion address security against impersonation.
  7065. e) More extensible introduction/rendezvous protocol.
  7066. f) A cleaner and more modular codebase.
  7067. You can identify a next-generation onion address by its length:
  7068. they are 56 characters long, as in
  7069. "4acth47i6kxnvkewtm6q7ib2s3ufpo5sqbsnzjpbi7utijcltosqemad.onion".
  7070. In the future, we will release more options and features for v3
  7071. onion services, but we first need a testing period, so that the
  7072. current codebase matures and becomes more robust. Planned features
  7073. include: offline keys, advanced client authorization, improved
  7074. guard algorithms, and statistics. For full details, see
  7075. proposal 224.
  7076. Legacy ("v2") onion services will still work for the foreseeable
  7077. future, and will remain the default until this new codebase gets
  7078. tested and hardened. Service operators who want to experiment with
  7079. the new system can use the 'HiddenServiceVersion 3' torrc
  7080. directive along with the regular onion service configuration
  7081. options. We will publish a blog post about this new feature
  7082. soon! Enjoy!
  7083. o Major bugfixes (usability, control port):
  7084. - Report trusted clock skew indications as bootstrap errors, so
  7085. controllers can more easily alert users when their clocks are
  7086. wrong. Fixes bug 23506; bugfix on 0.1.2.6-alpha.
  7087. o Minor features (bug detection):
  7088. - Log a warning message with a stack trace for any attempt to call
  7089. get_options() during option validation. This pattern has caused
  7090. subtle bugs in the past. Closes ticket 22281.
  7091. o Minor features (client):
  7092. - You can now use Tor as a tunneled HTTP proxy: use the new
  7093. HTTPTunnelPort option to open a port that accepts HTTP CONNECT
  7094. requests. Closes ticket 22407.
  7095. - Add an extra check to make sure that we always use the newer guard
  7096. selection code for picking our guards. Closes ticket 22779.
  7097. - When downloading (micro)descriptors, don't split the list into
  7098. multiple requests unless we want at least 32 descriptors.
  7099. Previously, we split at 4, not 32, which led to significant
  7100. overhead in HTTP request size and degradation in compression
  7101. performance. Closes ticket 23220.
  7102. o Minor features (command line):
  7103. - Add a new commandline option, --key-expiration, which prints when
  7104. the current signing key is going to expire. Implements ticket
  7105. 17639; patch by Isis Lovecruft.
  7106. o Minor features (control port):
  7107. - If an application tries to use the control port as an HTTP proxy,
  7108. respond with a meaningful "This is the Tor control port" message,
  7109. and log the event. Closes ticket 1667. Patch from Ravi
  7110. Chandra Padmala.
  7111. - Provide better error message for GETINFO desc/(id|name) when not
  7112. fetching router descriptors. Closes ticket 5847. Patch by
  7113. Kevin Butler.
  7114. - Add GETINFO "{desc,md}/download-enabled", to inform the controller
  7115. whether Tor will try to download router descriptors and
  7116. microdescriptors respectively. Closes ticket 22684.
  7117. - Added new GETINFO targets "ip-to-country/{ipv4,ipv6}-available",
  7118. so controllers can tell whether the geoip databases are loaded.
  7119. Closes ticket 23237.
  7120. - Adds a timestamp field to the CIRC_BW and STREAM_BW bandwidth
  7121. events. Closes ticket 19254. Patch by "DonnchaC".
  7122. o Minor features (development support):
  7123. - Developers can now generate a call-graph for Tor using the
  7124. "calltool" python program, which post-processes object dumps. It
  7125. should work okay on many Linux and OSX platforms, and might work
  7126. elsewhere too. To run it, install calltool from
  7127. https://gitweb.torproject.org/user/nickm/calltool.git and run
  7128. "make callgraph". Closes ticket 19307.
  7129. o Minor features (ed25519):
  7130. - Add validation function to checks for torsion components in
  7131. ed25519 public keys, used by prop224 client-side code. Closes
  7132. ticket 22006. Math help by Ian Goldberg.
  7133. o Minor features (exit relay, DNS):
  7134. - Improve the clarity and safety of the log message from evdns when
  7135. receiving an apparently spoofed DNS reply. Closes ticket 3056.
  7136. o Minor features (integration, hardening):
  7137. - Add a new NoExec option to prevent Tor from running other
  7138. programs. When this option is set to 1, Tor will never try to run
  7139. another program, regardless of the settings of
  7140. PortForwardingHelper, ClientTransportPlugin, or
  7141. ServerTransportPlugin. Once NoExec is set, it cannot be disabled
  7142. without restarting Tor. Closes ticket 22976.
  7143. o Minor features (logging):
  7144. - Improve the warning message for specifying a relay by nickname.
  7145. The previous message implied that nickname registration was still
  7146. part of the Tor network design, which it isn't. Closes
  7147. ticket 20488.
  7148. - If the sandbox filter fails to load, suggest to the user that
  7149. their kernel might not support seccomp2. Closes ticket 23090.
  7150. o Minor features (portability):
  7151. - Check at configure time whether uint8_t is the same type as
  7152. unsigned char. Lots of existing code already makes this
  7153. assumption, and there could be strict aliasing issues if the
  7154. assumption is violated. Closes ticket 22410.
  7155. o Minor features (relay, configuration):
  7156. - Reject attempts to use relative file paths when RunAsDaemon is
  7157. set. Previously, Tor would accept these, but the directory-
  7158. changing step of RunAsDaemon would give strange and/or confusing
  7159. results. Closes ticket 22731.
  7160. o Minor features (startup, safety):
  7161. - When configured to write a PID file, Tor now exits if it is unable
  7162. to do so. Previously, it would warn and continue. Closes
  7163. ticket 20119.
  7164. o Minor features (static analysis):
  7165. - The BUG() macro has been changed slightly so that Coverity no
  7166. longer complains about dead code if the bug is impossible. Closes
  7167. ticket 23054.
  7168. o Minor features (testing):
  7169. - The default chutney network tests now include tests for the v3
  7170. hidden service design. Make sure you have the latest version of
  7171. chutney if you want to run these. Closes ticket 22437.
  7172. - Add a unit test to verify that we can parse a hardcoded v2 hidden
  7173. service descriptor. Closes ticket 15554.
  7174. o Minor bugfixes (certificate handling):
  7175. - Fix a time handling bug in Tor certificates set to expire after
  7176. the year 2106. Fixes bug 23055; bugfix on 0.3.0.1-alpha. Found by
  7177. Coverity as CID 1415728.
  7178. o Minor bugfixes (client, usability):
  7179. - Refrain from needlessly rejecting SOCKS5-with-hostnames and
  7180. SOCKS4a requests that contain IP address strings, even when
  7181. SafeSocks in enabled, as this prevents user from connecting to
  7182. known IP addresses without relying on DNS for resolving. SafeSocks
  7183. still rejects SOCKS connections that connect to IP addresses when
  7184. those addresses are _not_ encoded as hostnames. Fixes bug 22461;
  7185. bugfix on Tor 0.2.6.2-alpha.
  7186. o Minor bugfixes (code correctness):
  7187. - Call htons() in extend_cell_format() for encoding a 16-bit value.
  7188. Previously we used ntohs(), which happens to behave the same on
  7189. all the platforms we support, but which isn't really correct.
  7190. Fixes bug 23106; bugfix on 0.2.4.8-alpha.
  7191. - For defense-in-depth, make the controller's write_escaped_data()
  7192. function robust to extremely long inputs. Fixes bug 19281; bugfix
  7193. on 0.1.1.1-alpha. Reported by Guido Vranken.
  7194. o Minor bugfixes (compilation):
  7195. - Fix unused-variable warnings in donna's Curve25519 SSE2 code.
  7196. Fixes bug 22895; bugfix on 0.2.7.2-alpha.
  7197. o Minor bugfixes (consensus expiry):
  7198. - Check for adequate directory information correctly. Previously, Tor
  7199. would reconsider whether it had sufficient directory information
  7200. every 2 minutes. Fixes bug 23091; bugfix on 0.2.0.19-alpha.
  7201. o Minor bugfixes (directory protocol):
  7202. - Directory servers now include a "Date:" http header for response
  7203. codes other than 200. Clients starting with a skewed clock and a
  7204. recent consensus were getting "304 Not modified" responses from
  7205. directory authorities, so without the Date header, the client
  7206. would never hear about a wrong clock. Fixes bug 23499; bugfix
  7207. on 0.0.8rc1.
  7208. - Make clients wait for 6 seconds before trying to download a
  7209. consensus from an authority. Fixes bug 17750; bugfix
  7210. on 0.2.8.1-alpha.
  7211. o Minor bugfixes (DoS-resistance):
  7212. - If future code asks if there are any running bridges, without
  7213. checking if bridges are enabled, log a BUG warning rather than
  7214. crashing. Fixes bug 23524; bugfix on 0.3.0.1-alpha.
  7215. o Minor bugfixes (format strictness):
  7216. - Restrict several data formats to decimal. Previously, the
  7217. BuildTimeHistogram entries in the state file, the "bw=" entries in
  7218. the bandwidth authority file, and the process IDs passed to the
  7219. __OwningControllerProcess option could all be specified in hex or
  7220. octal as well as in decimal. This was not an intentional feature.
  7221. Fixes bug 22802; bugfixes on 0.2.2.1-alpha, 0.2.2.2-alpha,
  7222. and 0.2.2.28-beta.
  7223. o Minor bugfixes (heartbeat):
  7224. - If we fail to write a heartbeat message, schedule a retry for the
  7225. minimum heartbeat interval number of seconds in the future. Fixes
  7226. bug 19476; bugfix on 0.2.3.1-alpha.
  7227. o Minor bugfixes (linux seccomp2 sandbox, logging):
  7228. - Fix some messages on unexpected errors from the seccomp2 library.
  7229. Fixes bug 22750; bugfix on 0.2.5.1-alpha. Patch from "cypherpunks".
  7230. o Minor bugfixes (logging):
  7231. - Remove duplicate log messages regarding opening non-local
  7232. SocksPorts upon parsing config and opening listeners at startup.
  7233. Fixes bug 4019; bugfix on 0.2.3.3-alpha.
  7234. - Use a more comprehensible log message when telling the user
  7235. they've excluded every running exit node. Fixes bug 7890; bugfix
  7236. on 0.2.2.25-alpha.
  7237. - When logging the number of descriptors we intend to download per
  7238. directory request, do not log a number higher than then the number
  7239. of descriptors we're fetching in total. Fixes bug 19648; bugfix
  7240. on 0.1.1.8-alpha.
  7241. - When warning about a directory owned by the wrong user, log the
  7242. actual name of the user owning the directory. Previously, we'd log
  7243. the name of the process owner twice. Fixes bug 23487; bugfix
  7244. on 0.2.9.1-alpha.
  7245. - The tor specification says hop counts are 1-based, so fix two log
  7246. messages that mistakenly logged 0-based hop counts. Fixes bug
  7247. 18982; bugfix on 0.2.6.2-alpha and 0.2.4.5-alpha. Patch by teor.
  7248. Credit to Xiaofan Li for reporting this issue.
  7249. o Minor bugfixes (portability):
  7250. - Stop using the PATH_MAX variable, which is not defined on GNU
  7251. Hurd. Fixes bug 23098; bugfix on 0.3.1.1-alpha.
  7252. o Minor bugfixes (relay):
  7253. - When uploading our descriptor for the first time after startup,
  7254. report the reason for uploading as "Tor just started" rather than
  7255. leaving it blank. Fixes bug 22885; bugfix on 0.2.3.4-alpha.
  7256. - Avoid unnecessary calls to directory_fetches_from_authorities() on
  7257. relays, to prevent spurious address resolutions and descriptor
  7258. rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
  7259. bugfix on in 0.2.8.1-alpha.
  7260. o Minor bugfixes (tests):
  7261. - Fix a broken unit test for the OutboundAddress option: the parsing
  7262. function was never returning an error on failure. Fixes bug 23366;
  7263. bugfix on 0.3.0.3-alpha.
  7264. - Fix a signed-integer overflow in the unit tests for
  7265. dir/download_status_random_backoff, which was untriggered until we
  7266. fixed bug 17750. Fixes bug 22924; bugfix on 0.2.9.1-alpha.
  7267. o Minor bugfixes (usability, control port):
  7268. - Stop making an unnecessary routerlist check in NETINFO clock skew
  7269. detection; this was preventing clients from reporting NETINFO clock
  7270. skew to controllers. Fixes bug 23532; bugfix on 0.2.4.4-alpha.
  7271. o Code simplification and refactoring:
  7272. - Extract the code for handling newly-open channels into a separate
  7273. function from the general code to handle channel state
  7274. transitions. This change simplifies our callgraph, reducing the
  7275. size of the largest strongly connected component by roughly a
  7276. factor of two. Closes ticket 22608.
  7277. - Remove dead code for largely unused statistics on the number of
  7278. times we've attempted various public key operations. Fixes bug
  7279. 19871; bugfix on 0.1.2.4-alpha. Fix by Isis Lovecruft.
  7280. - Remove several now-obsolete functions for asking about old
  7281. variants directory authority status. Closes ticket 22311; patch
  7282. from "huyvq".
  7283. - Remove some of the code that once supported "Named" and "Unnamed"
  7284. routers. Authorities no longer vote for these flags. Closes
  7285. ticket 22215.
  7286. - Rename the obsolete malleable hybrid_encrypt functions used in TAP
  7287. and old hidden services, to indicate that they aren't suitable for
  7288. new protocols or formats. Closes ticket 23026.
  7289. - Replace our STRUCT_OFFSET() macro with offsetof(). Closes ticket
  7290. 22521. Patch from Neel Chauhan.
  7291. - Split the enormous circuit_send_next_onion_skin() function into
  7292. multiple subfunctions. Closes ticket 22804.
  7293. - Split the portions of the buffer.c module that handle particular
  7294. protocols into separate modules. Part of ticket 23149.
  7295. - Use our test macros more consistently, to produce more useful
  7296. error messages when our unit tests fail. Add coccinelle patches to
  7297. allow us to re-check for test macro uses. Closes ticket 22497.
  7298. o Deprecated features:
  7299. - Deprecate HTTPProxy/HTTPProxyAuthenticator config options. They
  7300. only applies to direct unencrypted HTTP connections to your
  7301. directory server, which your Tor probably isn't using. Closes
  7302. ticket 20575.
  7303. o Documentation:
  7304. - Clarify in the manual that "Sandbox 1" is only supported on Linux
  7305. kernels. Closes ticket 22677.
  7306. - Document all values of PublishServerDescriptor in the manpage.
  7307. Closes ticket 15645.
  7308. - Improve the documentation for the directory port part of the
  7309. DirAuthority line. Closes ticket 20152.
  7310. - Restore documentation for the authorities' "approved-routers"
  7311. file. Closes ticket 21148.
  7312. o Removed features:
  7313. - The AllowDotExit option has been removed as unsafe. It has been
  7314. deprecated since 0.2.9.2-alpha. Closes ticket 23426.
  7315. - The ClientDNSRejectInternalAddresses flag can no longer be set on
  7316. non-testing networks. It has been deprecated since 0.2.9.2-alpha.
  7317. Closes ticket 21031.
  7318. - The controller API no longer includes an AUTHDIR_NEWDESCS event:
  7319. nobody was using it any longer. Closes ticket 22377.
  7320. Changes in version 0.2.8.15 - 2017-09-18
  7321. Tor 0.2.8.15 backports a collection of bugfixes from later
  7322. Tor series.
  7323. Most significantly, it includes a fix for TROVE-2017-008, a
  7324. security bug that affects hidden services running with the
  7325. SafeLogging option disabled. For more information, see
  7326. https://trac.torproject.org/projects/tor/ticket/23490
  7327. Note that Tor 0.2.8.x will no longer be supported after 1 Jan
  7328. 2018. We suggest that you upgrade to the latest stable release if
  7329. possible. If you can't, we recommend that you upgrade at least to
  7330. 0.2.9, which will be supported until 2020.
  7331. o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
  7332. - Avoid an assertion failure bug affecting our implementation of
  7333. inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
  7334. handling of "0xx" differs from what we had expected. Fixes bug
  7335. 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
  7336. o Minor features:
  7337. - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
  7338. Country database.
  7339. o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
  7340. - Backport a fix for an "unused variable" warning that appeared
  7341. in some versions of mingw. Fixes bug 22838; bugfix on
  7342. 0.2.8.1-alpha.
  7343. o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
  7344. - Fix a memset() off the end of an array when packing cells. This
  7345. bug should be harmless in practice, since the corrupted bytes are
  7346. still in the same structure, and are always padding bytes,
  7347. ignored, or immediately overwritten, depending on compiler
  7348. behavior. Nevertheless, because the memset()'s purpose is to make
  7349. sure that any other cell-handling bugs can't expose bytes to the
  7350. network, we need to fix it. Fixes bug 22737; bugfix on
  7351. 0.2.4.11-alpha. Fixes CID 1401591.
  7352. o Build features (backport from 0.3.1.5-alpha):
  7353. - Tor's repository now includes a Travis Continuous Integration (CI)
  7354. configuration file (.travis.yml). This is meant to help new
  7355. developers and contributors who fork Tor to a Github repository be
  7356. better able to test their changes, and understand what we expect
  7357. to pass. To use this new build feature, you must fork Tor to your
  7358. Github account, then go into the "Integrations" menu in the
  7359. repository settings for your fork and enable Travis, then push
  7360. your changes. Closes ticket 22636.
  7361. Changes in version 0.2.9.12 - 2017-09-18
  7362. Tor 0.2.9.12 backports a collection of bugfixes from later
  7363. Tor series.
  7364. Most significantly, it includes a fix for TROVE-2017-008, a
  7365. security bug that affects hidden services running with the
  7366. SafeLogging option disabled. For more information, see
  7367. https://trac.torproject.org/projects/tor/ticket/23490
  7368. o Major features (security, backport from 0.3.0.2-alpha):
  7369. - Change the algorithm used to decide DNS TTLs on client and server
  7370. side, to better resist DNS-based correlation attacks like the
  7371. DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
  7372. Feamster. Now relays only return one of two possible DNS TTL
  7373. values, and clients are willing to believe DNS TTL values up to 3
  7374. hours long. Closes ticket 19769.
  7375. o Major bugfixes (crash, directory connections, backport from 0.3.0.5-rc):
  7376. - Fix a rare crash when sending a begin cell on a circuit whose
  7377. linked directory connection had already been closed. Fixes bug
  7378. 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.
  7379. o Major bugfixes (DNS, backport from 0.3.0.2-alpha):
  7380. - Fix a bug that prevented exit nodes from caching DNS records for
  7381. more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.
  7382. o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
  7383. - Fix a typo that had prevented TPROXY-based transparent proxying
  7384. from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
  7385. Patch from "d4fq0fQAgoJ".
  7386. o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
  7387. - Avoid an assertion failure bug affecting our implementation of
  7388. inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
  7389. handling of "0xx" differs from what we had expected. Fixes bug
  7390. 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
  7391. o Minor features (code style, backport from 0.3.1.3-alpha):
  7392. - Add "Falls through" comments to our codebase, in order to silence
  7393. GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
  7394. Stieger. Closes ticket 22446.
  7395. o Minor features (geoip):
  7396. - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
  7397. Country database.
  7398. o Minor bugfixes (bandwidth accounting, backport from 0.3.1.1-alpha):
  7399. - Roll over monthly accounting at the configured hour and minute,
  7400. rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
  7401. Found by Andrey Karpov with PVS-Studio.
  7402. o Minor bugfixes (compilation, backport from 0.3.1.5-alpha):
  7403. - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
  7404. bugfix on 0.2.8.1-alpha.
  7405. - Fix warnings when building with libscrypt and openssl scrypt support
  7406. on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
  7407. - When building with certain versions the mingw C header files, avoid
  7408. float-conversion warnings when calling the C functions isfinite(),
  7409. isnan(), and signbit(). Fixes bug 22801; bugfix on 0.2.8.1-alpha.
  7410. o Minor bugfixes (compilation, backport from 0.3.1.7):
  7411. - Avoid compiler warnings in the unit tests for running tor_sscanf()
  7412. with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
  7413. o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
  7414. - Backport a fix for an "unused variable" warning that appeared
  7415. in some versions of mingw. Fixes bug 22838; bugfix on
  7416. 0.2.8.1-alpha.
  7417. o Minor bugfixes (controller, backport from 0.3.1.7):
  7418. - Do not crash when receiving a HSPOST command with an empty body.
  7419. Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
  7420. - Do not crash when receiving a POSTDESCRIPTOR command with an
  7421. empty body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
  7422. o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
  7423. - Avoid Coverity build warnings related to our BUG() macro. By
  7424. default, Coverity treats BUG() as the Linux kernel does: an
  7425. instant abort(). We need to override that so our BUG() macro
  7426. doesn't prevent Coverity from analyzing functions that use it.
  7427. Fixes bug 23030; bugfix on 0.2.9.1-alpha.
  7428. o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
  7429. - Fix a memset() off the end of an array when packing cells. This
  7430. bug should be harmless in practice, since the corrupted bytes are
  7431. still in the same structure, and are always padding bytes,
  7432. ignored, or immediately overwritten, depending on compiler
  7433. behavior. Nevertheless, because the memset()'s purpose is to make
  7434. sure that any other cell-handling bugs can't expose bytes to the
  7435. network, we need to fix it. Fixes bug 22737; bugfix on
  7436. 0.2.4.11-alpha. Fixes CID 1401591.
  7437. o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
  7438. - When setting the maximum number of connections allowed by the OS,
  7439. always allow some extra file descriptors for other files. Fixes
  7440. bug 22797; bugfix on 0.2.0.10-alpha.
  7441. o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
  7442. - Avoid a sandbox failure when trying to re-bind to a socket and
  7443. mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
  7444. o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
  7445. - Permit the fchmod system call, to avoid crashing on startup when
  7446. starting with the seccomp2 sandbox and an unexpected set of
  7447. permissions on the data directory or its contents. Fixes bug
  7448. 22516; bugfix on 0.2.5.4-alpha.
  7449. o Minor bugfixes (relay, backport from 0.3.0.5-rc):
  7450. - Avoid a double-marked-circuit warning that could happen when we
  7451. receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
  7452. on 0.1.0.1-rc.
  7453. o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
  7454. - Reject version numbers with non-numeric prefixes (such as +, -, or
  7455. whitespace). Disallowing whitespace prevents differential version
  7456. parsing between POSIX-based and Windows platforms. Fixes bug 21507
  7457. and part of 21508; bugfix on 0.0.8pre1.
  7458. o Build features (backport from 0.3.1.5-alpha):
  7459. - Tor's repository now includes a Travis Continuous Integration (CI)
  7460. configuration file (.travis.yml). This is meant to help new
  7461. developers and contributors who fork Tor to a Github repository be
  7462. better able to test their changes, and understand what we expect
  7463. to pass. To use this new build feature, you must fork Tor to your
  7464. Github account, then go into the "Integrations" menu in the
  7465. repository settings for your fork and enable Travis, then push
  7466. your changes. Closes ticket 22636.
  7467. Changes in version 0.3.0.11 - 2017-09-18
  7468. Tor 0.3.0.11 backports a collection of bugfixes from Tor the 0.3.1
  7469. series.
  7470. Most significantly, it includes a fix for TROVE-2017-008, a
  7471. security bug that affects hidden services running with the
  7472. SafeLogging option disabled. For more information, see
  7473. https://trac.torproject.org/projects/tor/ticket/23490
  7474. o Minor features (code style, backport from 0.3.1.7):
  7475. - Add "Falls through" comments to our codebase, in order to silence
  7476. GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
  7477. Stieger. Closes ticket 22446.
  7478. o Minor features:
  7479. - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
  7480. Country database.
  7481. o Minor bugfixes (compilation, backport from 0.3.1.7):
  7482. - Avoid compiler warnings in the unit tests for calling tor_sscanf()
  7483. with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
  7484. o Minor bugfixes (controller, backport from 0.3.1.7):
  7485. - Do not crash when receiving a HSPOST command with an empty body.
  7486. Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
  7487. - Do not crash when receiving a POSTDESCRIPTOR command with an empty
  7488. body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
  7489. o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
  7490. - When setting the maximum number of connections allowed by the OS,
  7491. always allow some extra file descriptors for other files. Fixes
  7492. bug 22797; bugfix on 0.2.0.10-alpha.
  7493. o Minor bugfixes (logging, relay, backport from 0.3.1.6-rc):
  7494. - Remove a forgotten debugging message when an introduction point
  7495. successfully establishes a hidden service prop224 circuit with
  7496. a client.
  7497. - Change three other log_warn() for an introduction point to
  7498. protocol warnings, because they can be failure from the network
  7499. and are not relevant to the operator. Fixes bug 23078; bugfix on
  7500. 0.3.0.1-alpha and 0.3.0.2-alpha.
  7501. Changes in version 0.3.1.7 - 2017-09-18
  7502. Tor 0.3.1.7 is the first stable release in the 0.3.1 series.
  7503. With the 0.3.1 series, Tor now serves and downloads directory
  7504. information in more compact formats, to save on bandwidth overhead. It
  7505. also contains a new padding system to resist netflow-based traffic
  7506. analysis, and experimental support for building parts of Tor in Rust
  7507. (though no parts of Tor are in Rust yet). There are also numerous
  7508. small features, bugfixes on earlier release series, and groundwork for
  7509. the hidden services revamp of 0.3.2.
  7510. This release also includes a fix for TROVE-2017-008, a security bug
  7511. that affects hidden services running with the SafeLogging option
  7512. disabled. For more information, see
  7513. https://trac.torproject.org/projects/tor/ticket/23490
  7514. Per our stable release policy, we plan to support each stable release
  7515. series for at least the next nine months, or for three months after
  7516. the first stable release of the next series: whichever is longer. If
  7517. you need a release with long-term support, we recommend that you stay
  7518. with the 0.2.9 series.
  7519. Below is a list of the changes since 0.3.1.6-rc. For a list of all
  7520. changes since 0.3.0, see the ReleaseNotes file.
  7521. o Major bugfixes (security, hidden services, loggging):
  7522. - Fix a bug where we could log uninitialized stack when a certain
  7523. hidden service error occurred while SafeLogging was disabled.
  7524. Fixes bug #23490; bugfix on 0.2.7.2-alpha. This is also tracked as
  7525. TROVE-2017-008 and CVE-2017-0380.
  7526. o Minor features (defensive programming):
  7527. - Create a pair of consensus parameters, nf_pad_tor2web and
  7528. nf_pad_single_onion, to disable netflow padding in the consensus
  7529. for non-anonymous connections in case the overhead is high. Closes
  7530. ticket 17857.
  7531. o Minor features (diagnostic):
  7532. - Add a stack trace to the bug warnings that can be logged when
  7533. trying to send an outgoing relay cell with n_chan == 0. Diagnostic
  7534. attempt for bug 23105.
  7535. o Minor features (geoip):
  7536. - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
  7537. Country database.
  7538. o Minor bugfixes (compilation):
  7539. - Avoid compiler warnings in the unit tests for calling tor_sscanf()
  7540. with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
  7541. o Minor bugfixes (controller):
  7542. - Do not crash when receiving a HSPOST command with an empty body.
  7543. Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
  7544. - Do not crash when receiving a POSTDESCRIPTOR command with an empty
  7545. body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
  7546. o Minor bugfixes (relay):
  7547. - Inform the geoip and rephist modules about all requests, even on
  7548. relays that are only fetching microdescriptors. Fixes a bug
  7549. related to 21585; bugfix on 0.3.0.1-alpha.
  7550. o Minor bugfixes (unit tests):
  7551. - Fix a channelpadding unit test failure on slow systems by using
  7552. mocked time instead of actual time. Fixes bug 23077; bugfix
  7553. on 0.3.1.1-alpha.
  7554. Changes in version 0.3.1.6-rc - 2017-09-05
  7555. Tor 0.3.1.6-rc fixes a few small bugs and annoyances in the 0.3.1
  7556. release series, including a bug that produced weird behavior on
  7557. Windows directory caches.
  7558. This is the first release candidate in the Tor 0.3.1 series. If we
  7559. find no new bugs or regressions here, the first stable 0.3.1 release
  7560. will be nearly identical to it.
  7561. o Major bugfixes (windows, directory cache):
  7562. - On Windows, do not try to delete cached consensus documents and
  7563. diffs before they are unmapped from memory--Windows won't allow
  7564. that. Instead, allow the consensus cache directory to grow larger,
  7565. to hold files that might need to stay around longer. Fixes bug
  7566. 22752; bugfix on 0.3.1.1-alpha.
  7567. o Minor features (directory authority):
  7568. - Improve the message that authorities report to relays that present
  7569. RSA/Ed25519 keypairs that conflict with previously pinned keys.
  7570. Closes ticket 22348.
  7571. o Minor features (geoip):
  7572. - Update geoip and geoip6 to the August 3 2017 Maxmind GeoLite2
  7573. Country database.
  7574. o Minor features (testing):
  7575. - Add more tests for compression backend initialization. Closes
  7576. ticket 22286.
  7577. o Minor bugfixes (directory cache):
  7578. - Fix a memory leak when recovering space in the consensus cache.
  7579. Fixes bug 23139; bugfix on 0.3.1.1-alpha.
  7580. o Minor bugfixes (hidden service):
  7581. - Increase the number of circuits that a service is allowed to
  7582. open over a specific period of time. The value was lower than it
  7583. should be (8 vs 12) in the normal case of 3 introduction points.
  7584. Fixes bug 22159; bugfix on 0.3.0.5-rc.
  7585. - Fix a BUG warning during HSv3 descriptor decoding that could be
  7586. cause by a specially crafted descriptor. Fixes bug 23233; bugfix
  7587. on 0.3.0.1-alpha. Bug found by "haxxpop".
  7588. - Rate-limit the log messages if we exceed the maximum number of
  7589. allowed intro circuits. Fixes bug 22159; bugfix on 0.3.1.1-alpha.
  7590. o Minor bugfixes (logging, relay):
  7591. - Remove a forgotten debugging message when an introduction point
  7592. successfully establishes a hidden service prop224 circuit with
  7593. a client.
  7594. - Change three other log_warn() for an introduction point to
  7595. protocol warnings, because they can be failure from the network
  7596. and are not relevant to the operator. Fixes bug 23078; bugfix on
  7597. 0.3.0.1-alpha and 0.3.0.2-alpha.
  7598. o Minor bugfixes (relay):
  7599. - When a relay is not running as a directory cache, it will no
  7600. longer generate compressed consensuses and consensus diff
  7601. information. Previously, this was a waste of disk and CPU. Fixes
  7602. bug 23275; bugfix on 0.3.1.1-alpha.
  7603. o Minor bugfixes (robustness, error handling):
  7604. - Improve our handling of the cases where OpenSSL encounters a
  7605. memory error while encoding keys and certificates. We haven't
  7606. observed these errors in the wild, but if they do happen, we now
  7607. detect and respond better. Fixes bug 19418; bugfix on all versions
  7608. of Tor. Reported by Guido Vranken.
  7609. o Minor bugfixes (stability):
  7610. - Avoid crashing on a double-free when unable to load or process an
  7611. included file. Fixes bug 23155; bugfix on 0.3.1.1-alpha. Found
  7612. with the clang static analyzer.
  7613. o Minor bugfixes (testing):
  7614. - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
  7615. bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
  7616. - Port the hs_ntor handshake test to work correctly with recent
  7617. versions of the pysha3 module. Fixes bug 23071; bugfix
  7618. on 0.3.1.1-alpha.
  7619. o Minor bugfixes (Windows service):
  7620. - When running as a Windows service, set the ID of the main thread
  7621. correctly. Failure to do so made us fail to send log messages to
  7622. the controller in 0.2.1.16-rc, slowed down controller event
  7623. delivery in 0.2.7.3-rc and later, and crash with an assertion
  7624. failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
  7625. Patch and diagnosis from "Vort".
  7626. Changes in version 0.3.0.10 - 2017-08-02
  7627. Tor 0.3.0.10 backports a collection of small-to-medium bugfixes
  7628. from the current Tor alpha series. OpenBSD users and TPROXY users
  7629. should upgrade; others are probably okay sticking with 0.3.0.9.
  7630. o Major features (build system, continuous integration, backport from 0.3.1.5-alpha):
  7631. - Tor's repository now includes a Travis Continuous Integration (CI)
  7632. configuration file (.travis.yml). This is meant to help new
  7633. developers and contributors who fork Tor to a Github repository be
  7634. better able to test their changes, and understand what we expect
  7635. to pass. To use this new build feature, you must fork Tor to your
  7636. Github account, then go into the "Integrations" menu in the
  7637. repository settings for your fork and enable Travis, then push
  7638. your changes. Closes ticket 22636.
  7639. o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
  7640. - Fix a typo that had prevented TPROXY-based transparent proxying
  7641. from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
  7642. Patch from "d4fq0fQAgoJ".
  7643. o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
  7644. - Avoid an assertion failure bug affecting our implementation of
  7645. inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
  7646. handling of "0xbar" differs from what we had expected. Fixes bug
  7647. 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
  7648. o Minor features (backport from 0.3.1.5-alpha):
  7649. - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
  7650. Country database.
  7651. o Minor bugfixes (bandwidth accounting, backport from 0.3.1.2-alpha):
  7652. - Roll over monthly accounting at the configured hour and minute,
  7653. rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
  7654. Found by Andrey Karpov with PVS-Studio.
  7655. o Minor bugfixes (compilation warnings, backport from 0.3.1.5-alpha):
  7656. - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
  7657. bugfix on 0.2.8.1-alpha.
  7658. - Fix warnings when building with libscrypt and openssl scrypt
  7659. support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
  7660. - When building with certain versions of the mingw C header files,
  7661. avoid float-conversion warnings when calling the C functions
  7662. isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
  7663. on 0.2.8.1-alpha.
  7664. o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
  7665. - Backport a fix for an "unused variable" warning that appeared
  7666. in some versions of mingw. Fixes bug 22838; bugfix on
  7667. 0.2.8.1-alpha.
  7668. o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
  7669. - Avoid Coverity build warnings related to our BUG() macro. By
  7670. default, Coverity treats BUG() as the Linux kernel does: an
  7671. instant abort(). We need to override that so our BUG() macro
  7672. doesn't prevent Coverity from analyzing functions that use it.
  7673. Fixes bug 23030; bugfix on 0.2.9.1-alpha.
  7674. o Minor bugfixes (directory authority, backport from 0.3.1.1-alpha):
  7675. - When rejecting a router descriptor for running an obsolete version
  7676. of Tor without ntor support, warn about the obsolete tor version,
  7677. not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.
  7678. o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
  7679. - Avoid a sandbox failure when trying to re-bind to a socket and
  7680. mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
  7681. o Minor bugfixes (unit tests, backport from 0.3.1.5-alpha)
  7682. - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
  7683. Fixes bug 22803; bugfix on 0.3.0.1-alpha.
  7684. Changes in version 0.3.1.5-alpha - 2017-08-01
  7685. Tor 0.3.1.5-alpha improves the performance of consensus diff
  7686. calculation, fixes a crash bug on older versions of OpenBSD, and fixes
  7687. several other bugs. If no serious bugs are found in this version, the
  7688. next version will be a release candidate.
  7689. This release also marks the end of support for the Tor 0.2.4.x,
  7690. 0.2.6.x, and 0.2.7.x release series. Those releases will receive no
  7691. further bug or security fixes. Anyone still running or distributing
  7692. one of those versions should upgrade.
  7693. o Major features (build system, continuous integration):
  7694. - Tor's repository now includes a Travis Continuous Integration (CI)
  7695. configuration file (.travis.yml). This is meant to help new
  7696. developers and contributors who fork Tor to a Github repository be
  7697. better able to test their changes, and understand what we expect
  7698. to pass. To use this new build feature, you must fork Tor to your
  7699. Github account, then go into the "Integrations" menu in the
  7700. repository settings for your fork and enable Travis, then push
  7701. your changes. Closes ticket 22636.
  7702. o Major bugfixes (openbsd, denial-of-service):
  7703. - Avoid an assertion failure bug affecting our implementation of
  7704. inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
  7705. handling of "0xbar" differs from what we had expected. Fixes bug
  7706. 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
  7707. o Major bugfixes (relay, performance):
  7708. - Perform circuit handshake operations at a higher priority than we
  7709. use for consensus diff creation and compression. This should
  7710. prevent circuits from starving when a relay or bridge receives a
  7711. new consensus, especially on lower-powered machines. Fixes bug
  7712. 22883; bugfix on 0.3.1.1-alpha.
  7713. o Minor features (bridge authority):
  7714. - Add "fingerprint" lines to the networkstatus-bridges file produced
  7715. by bridge authorities. Closes ticket 22207.
  7716. o Minor features (directory cache, consensus diff):
  7717. - Add a new MaxConsensusAgeForDiffs option to allow directory cache
  7718. operators with low-resource environments to adjust the number of
  7719. consensuses they'll store and generate diffs from. Most cache
  7720. operators should leave it unchanged. Helps to work around
  7721. bug 22883.
  7722. o Minor features (geoip):
  7723. - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
  7724. Country database.
  7725. o Minor features (relay, performance):
  7726. - Always start relays with at least two worker threads, to prevent
  7727. priority inversion on slow tasks. Part of the fix for bug 22883.
  7728. - Allow background work to be queued with different priorities, so
  7729. that a big pile of slow low-priority jobs will not starve out
  7730. higher priority jobs. This lays the groundwork for a fix for
  7731. bug 22883.
  7732. o Minor bugfixes (build system, rust):
  7733. - Fix a problem where Rust toolchains were not being found when
  7734. building without --enable-cargo-online-mode, due to setting the
  7735. $HOME environment variable instead of $CARGO_HOME. Fixes bug
  7736. 22830; bugfix on 0.3.1.1-alpha. Fix by Chelsea Komlo.
  7737. o Minor bugfixes (compatibility, zstd):
  7738. - Write zstd epilogues correctly when the epilogue requires
  7739. reallocation of the output buffer, even with zstd 1.3.0.
  7740. (Previously, we worked on 1.2.0 and failed with 1.3.0). Fixes bug
  7741. 22927; bugfix on 0.3.1.1-alpha.
  7742. o Minor bugfixes (compilation warnings):
  7743. - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug
  7744. 22915; bugfix on 0.2.8.1-alpha.
  7745. - Fix warnings when building with libscrypt and openssl scrypt
  7746. support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
  7747. - Compile correctly when both openssl 1.1.0 and libscrypt are
  7748. detected. Previously this would cause an error. Fixes bug 22892;
  7749. bugfix on 0.3.1.1-alpha.
  7750. - When building with certain versions of the mingw C header files,
  7751. avoid float-conversion warnings when calling the C functions
  7752. isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
  7753. on 0.2.8.1-alpha.
  7754. o Minor bugfixes (coverity build support):
  7755. - Avoid Coverity build warnings related to our BUG() macro. By
  7756. default, Coverity treats BUG() as the Linux kernel does: an
  7757. instant abort(). We need to override that so our BUG() macro
  7758. doesn't prevent Coverity from analyzing functions that use it.
  7759. Fixes bug 23030; bugfix on 0.2.9.1-alpha.
  7760. o Minor bugfixes (directory authority):
  7761. - When a directory authority rejects a descriptor or extrainfo with
  7762. a given digest, mark that digest as undownloadable, so that we do
  7763. not attempt to download it again over and over. We previously
  7764. tried to avoid downloading such descriptors by other means, but we
  7765. didn't notice if we accidentally downloaded one anyway. This
  7766. behavior became problematic in 0.2.7.2-alpha, when authorities
  7767. began pinning Ed25519 keys. Fixes bug 22349; bugfix
  7768. on 0.2.1.19-alpha.
  7769. o Minor bugfixes (error reporting, windows):
  7770. - When formatting Windows error messages, use the English format to
  7771. avoid codepage issues. Fixes bug 22520; bugfix on 0.1.2.8-alpha.
  7772. Patch from "Vort".
  7773. o Minor bugfixes (file limits, osx):
  7774. - When setting the maximum number of connections allowed by the OS,
  7775. always allow some extra file descriptors for other files. Fixes
  7776. bug 22797; bugfix on 0.2.0.10-alpha.
  7777. o Minor bugfixes (linux seccomp2 sandbox):
  7778. - Avoid a sandbox failure when trying to re-bind to a socket and
  7779. mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
  7780. o Minor bugfixes (memory leaks):
  7781. - Fix a small memory leak when validating a configuration that uses
  7782. two or more AF_UNIX sockets for the same port type. Fixes bug
  7783. 23053; bugfix on 0.2.6.3-alpha. This is CID 1415725.
  7784. o Minor bugfixes (unit tests):
  7785. - test_consdiff_base64cmp would fail on OS X because while OS X
  7786. follows the standard of (less than zero/zero/greater than zero),
  7787. it doesn't follow the convention of (-1/0/+1). Make the test
  7788. comply with the standard. Fixes bug 22870; bugfix on 0.3.1.1-alpha.
  7789. - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
  7790. Fixes bug 22803; bugfix on 0.3.0.1-alpha.
  7791. Changes in version 0.3.1.4-alpha - 2017-06-29
  7792. Tor 0.3.1.4-alpha fixes a path selection bug that would allow a client
  7793. to use a guard that was in the same network family as a chosen exit
  7794. relay. This is a security regression; all clients running earlier
  7795. versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9
  7796. or 0.3.1.4-alpha.
  7797. This release also fixes several other bugs introduced in 0.3.0.x
  7798. and 0.3.1.x, including others that can affect bandwidth usage
  7799. and correctness.
  7800. o New dependencies:
  7801. - To build with zstd and lzma support, Tor now requires the
  7802. pkg-config tool at build time. (This requirement was new in
  7803. 0.3.1.1-alpha, but was not noted at the time. Noting it here to
  7804. close ticket 22623.)
  7805. o Major bugfixes (path selection, security):
  7806. - When choosing which guard to use for a circuit, avoid the exit's
  7807. family along with the exit itself. Previously, the new guard
  7808. selection logic avoided the exit, but did not consider its family.
  7809. Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017-
  7810. 006 and CVE-2017-0377.
  7811. o Major bugfixes (compression, zstd):
  7812. - Correctly detect a full buffer when decompressing a large zstd-
  7813. compressed input. Previously, we would sometimes treat a full
  7814. buffer as an error. Fixes bug 22628; bugfix on 0.3.1.1-alpha.
  7815. o Major bugfixes (directory protocol):
  7816. - Ensure that we send "304 Not modified" as HTTP status code when a
  7817. client is attempting to fetch a consensus or consensus diff, and
  7818. the best one we can send them is one they already have. Fixes bug
  7819. 22702; bugfix on 0.3.1.1-alpha.
  7820. o Major bugfixes (entry guards):
  7821. - When starting with an old consensus, do not add new entry guards
  7822. unless the consensus is "reasonably live" (under 1 day old). Fixes
  7823. one root cause of bug 22400; bugfix on 0.3.0.1-alpha.
  7824. o Minor features (bug mitigation, diagnostics, logging):
  7825. - Avoid an assertion failure, and log a better error message, when
  7826. unable to remove a file from the consensus cache on Windows.
  7827. Attempts to mitigate and diagnose bug 22752.
  7828. o Minor features (geoip):
  7829. - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
  7830. Country database.
  7831. o Minor bugfixes (compression):
  7832. - When compressing or decompressing a buffer, check for a failure to
  7833. create a compression object. Fixes bug 22626; bugfix
  7834. on 0.3.1.1-alpha.
  7835. - When decompressing a buffer, check for extra data after the end of
  7836. the compressed data. Fixes bug 22629; bugfix on 0.3.1.1-alpha.
  7837. - When decompressing an object received over an anonymous directory
  7838. connection, if we have already decompressed it using an acceptable
  7839. compression method, do not reject it for looking like an
  7840. unacceptable compression method. Fixes part of bug 22670; bugfix
  7841. on 0.3.1.1-alpha.
  7842. - When serving directory votes compressed with zlib, do not claim to
  7843. have compressed them with zstd. Fixes bug 22669; bugfix
  7844. on 0.3.1.1-alpha.
  7845. - When spooling compressed data to an output buffer, don't try to
  7846. spool more data when there is no more data to spool and we are not
  7847. trying to flush the input. Previously, we would sometimes launch
  7848. compression requests with nothing to do, which interferes with our
  7849. 22672 checks. Fixes bug 22719; bugfix on 0.2.0.16-alpha.
  7850. o Minor bugfixes (defensive programming):
  7851. - Detect and break out of infinite loops in our compression code. We
  7852. don't think that any such loops exist now, but it's best to be
  7853. safe. Closes ticket 22672.
  7854. - Fix a memset() off the end of an array when packing cells. This
  7855. bug should be harmless in practice, since the corrupted bytes are
  7856. still in the same structure, and are always padding bytes,
  7857. ignored, or immediately overwritten, depending on compiler
  7858. behavior. Nevertheless, because the memset()'s purpose is to make
  7859. sure that any other cell-handling bugs can't expose bytes to the
  7860. network, we need to fix it. Fixes bug 22737; bugfix on
  7861. 0.2.4.11-alpha. Fixes CID 1401591.
  7862. o Minor bugfixes (linux seccomp2 sandbox):
  7863. - Permit the fchmod system call, to avoid crashing on startup when
  7864. starting with the seccomp2 sandbox and an unexpected set of
  7865. permissions on the data directory or its contents. Fixes bug
  7866. 22516; bugfix on 0.2.5.4-alpha.
  7867. - Fix a crash in the LZMA module, when the sandbox was enabled, and
  7868. liblzma would allocate more than 16 MB of memory. We solve this by
  7869. bumping the mprotect() limit in the sandbox module from 16 MB to
  7870. 20 MB. Fixes bug 22751; bugfix on 0.3.1.1-alpha.
  7871. o Minor bugfixes (logging):
  7872. - When decompressing, do not warn if we fail to decompress using a
  7873. compression method that we merely guessed. Fixes part of bug
  7874. 22670; bugfix on 0.1.1.14-alpha.
  7875. - When decompressing, treat mismatch between content-encoding and
  7876. actual compression type as a protocol warning. Fixes part of bug
  7877. 22670; bugfix on 0.1.1.9-alpha.
  7878. - Downgrade "assigned_to_cpuworker failed" message to info-level
  7879. severity. In every case that can reach it, either a better warning
  7880. has already been logged, or no warning is warranted. Fixes bug
  7881. 22356; bugfix on 0.2.6.3-alpha.
  7882. - Demote a warn that was caused by libevent delays to info if
  7883. netflow padding is less than 4.5 seconds late, or to notice
  7884. if it is more (4.5 seconds is the amount of time that a netflow
  7885. record might be emitted after, if we chose the maximum timeout).
  7886. Fixes bug 22212; bugfix on 0.3.1.1-alpha.
  7887. o Minor bugfixes (process behavior):
  7888. - When exiting because of an error, always exit with a nonzero exit
  7889. status. Previously, we would fail to report an error in our exit
  7890. status in cases related to __OwningControllerProcess failure,
  7891. lockfile contention, and Ed25519 key initialization. Fixes bug
  7892. 22720; bugfix on versions 0.2.1.6-alpha, 0.2.2.28-beta, and
  7893. 0.2.7.2-alpha respectively. Reported by "f55jwk4f"; patch
  7894. from "huyvq".
  7895. o Documentation:
  7896. - Add a manpage description for the key-pinning-journal file. Closes
  7897. ticket 22347.
  7898. - Correctly note that bandwidth accounting values are stored in the
  7899. state file, and the bw_accounting file is now obsolete. Closes
  7900. ticket 16082.
  7901. - Document more of the files in the Tor data directory, including
  7902. cached-extrainfo, secret_onion_key{,_ntor}.old, hidserv-stats,
  7903. approved-routers, sr-random, and diff-cache. Found while fixing
  7904. ticket 22347.
  7905. Changes in version 0.3.0.9 - 2017-06-29
  7906. Tor 0.3.0.9 fixes a path selection bug that would allow a client
  7907. to use a guard that was in the same network family as a chosen exit
  7908. relay. This is a security regression; all clients running earlier
  7909. versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9 or
  7910. 0.3.1.4-alpha.
  7911. This release also backports several other bugfixes from the 0.3.1.x
  7912. series.
  7913. o Major bugfixes (path selection, security, backport from 0.3.1.4-alpha):
  7914. - When choosing which guard to use for a circuit, avoid the exit's
  7915. family along with the exit itself. Previously, the new guard
  7916. selection logic avoided the exit, but did not consider its family.
  7917. Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017-
  7918. 006 and CVE-2017-0377.
  7919. o Major bugfixes (entry guards, backport from 0.3.1.1-alpha):
  7920. - Don't block bootstrapping when a primary bridge is offline and we
  7921. can't get its descriptor. Fixes bug 22325; fixes one case of bug
  7922. 21969; bugfix on 0.3.0.3-alpha.
  7923. o Major bugfixes (entry guards, backport from 0.3.1.4-alpha):
  7924. - When starting with an old consensus, do not add new entry guards
  7925. unless the consensus is "reasonably live" (under 1 day old). Fixes
  7926. one root cause of bug 22400; bugfix on 0.3.0.1-alpha.
  7927. o Minor features (geoip):
  7928. - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
  7929. Country database.
  7930. o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
  7931. - Reject version numbers with non-numeric prefixes (such as +, -, or
  7932. whitespace). Disallowing whitespace prevents differential version
  7933. parsing between POSIX-based and Windows platforms. Fixes bug 21507
  7934. and part of 21508; bugfix on 0.0.8pre1.
  7935. o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
  7936. - Permit the fchmod system call, to avoid crashing on startup when
  7937. starting with the seccomp2 sandbox and an unexpected set of
  7938. permissions on the data directory or its contents. Fixes bug
  7939. 22516; bugfix on 0.2.5.4-alpha.
  7940. o Minor bugfixes (defensive programming, backport from 0.3.1.4-alpha):
  7941. - Fix a memset() off the end of an array when packing cells. This
  7942. bug should be harmless in practice, since the corrupted bytes are
  7943. still in the same structure, and are always padding bytes,
  7944. ignored, or immediately overwritten, depending on compiler
  7945. behavior. Nevertheless, because the memset()'s purpose is to make
  7946. sure that any other cell-handling bugs can't expose bytes to the
  7947. network, we need to fix it. Fixes bug 22737; bugfix on
  7948. 0.2.4.11-alpha. Fixes CID 1401591.
  7949. Changes in version 0.3.1.3-alpha - 2017-06-08
  7950. Tor 0.3.1.3-alpha fixes a pair of bugs that would allow an attacker to
  7951. remotely crash a hidden service with an assertion failure. Anyone
  7952. running a hidden service should upgrade to this version, or to some
  7953. other version with fixes for TROVE-2017-004 and TROVE-2017-005.
  7954. Tor 0.3.1.3-alpha also includes fixes for several key management bugs
  7955. that sometimes made relays unreliable, as well as several other
  7956. bugfixes described below.
  7957. o Major bugfixes (hidden service, relay, security):
  7958. - Fix a remotely triggerable assertion failure when a hidden service
  7959. handles a malformed BEGIN cell. Fixes bug 22493, tracked as
  7960. TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
  7961. - Fix a remotely triggerable assertion failure caused by receiving a
  7962. BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
  7963. 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
  7964. on 0.2.2.1-alpha.
  7965. o Major bugfixes (relay, link handshake):
  7966. - When performing the v3 link handshake on a TLS connection, report
  7967. that we have the x509 certificate that we actually used on that
  7968. connection, even if we have changed certificates since that
  7969. connection was first opened. Previously, we would claim to have
  7970. used our most recent x509 link certificate, which would sometimes
  7971. make the link handshake fail. Fixes one case of bug 22460; bugfix
  7972. on 0.2.3.6-alpha.
  7973. o Major bugfixes (relays, key management):
  7974. - Regenerate link and authentication certificates whenever the key
  7975. that signs them changes; also, regenerate link certificates
  7976. whenever the signed key changes. Previously, these processes were
  7977. only weakly coupled, and we relays could (for minutes to hours)
  7978. wind up with an inconsistent set of keys and certificates, which
  7979. other relays would not accept. Fixes two cases of bug 22460;
  7980. bugfix on 0.3.0.1-alpha.
  7981. - When sending an Ed25519 signing->link certificate in a CERTS cell,
  7982. send the certificate that matches the x509 certificate that we
  7983. used on the TLS connection. Previously, there was a race condition
  7984. if the TLS context rotated after we began the TLS handshake but
  7985. before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
  7986. on 0.3.0.1-alpha.
  7987. o Major bugfixes (torrc, crash):
  7988. - Fix a crash bug when using %include in torrc. Fixes bug 22417;
  7989. bugfix on 0.3.1.1-alpha. Patch by Daniel Pinto.
  7990. o Minor features (code style):
  7991. - Add "Falls through" comments to our codebase, in order to silence
  7992. GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
  7993. Stieger. Closes ticket 22446.
  7994. o Minor features (diagnostic):
  7995. - Add logging messages to try to diagnose a rare bug that seems to
  7996. generate RSA->Ed25519 cross-certificates dated in the 1970s. We
  7997. think this is happening because of incorrect system clocks, but
  7998. we'd like to know for certain. Diagnostic for bug 22466.
  7999. o Minor bugfixes (correctness):
  8000. - Avoid undefined behavior when parsing IPv6 entries from the geoip6
  8001. file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
  8002. o Minor bugfixes (directory protocol):
  8003. - Check for libzstd >= 1.1, because older versions lack the
  8004. necessary streaming API. Fixes bug 22413; bugfix on 0.3.1.1-alpha.
  8005. o Minor bugfixes (link handshake):
  8006. - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
  8007. months, and regenerate it when it is within one month of expiring.
  8008. Previously, we had generated this certificate at startup with a
  8009. ten-year lifetime, but that could lead to weird behavior when Tor
  8010. was started with a grossly inaccurate clock. Mitigates bug 22466;
  8011. mitigation on 0.3.0.1-alpha.
  8012. o Minor bugfixes (storage directories):
  8013. - Always check for underflows in the cached storage directory usage.
  8014. If the usage does underflow, re-calculate it. Also, avoid a
  8015. separate underflow when the usage is not known. Fixes bug 22424;
  8016. bugfix on 0.3.1.1-alpha.
  8017. o Minor bugfixes (unit tests):
  8018. - The unit tests now pass on systems where localhost is misconfigured
  8019. to some IPv4 address other than 127.0.0.1. Fixes bug 6298; bugfix
  8020. on 0.0.9pre2.
  8021. o Documentation:
  8022. - Clarify the manpage for the (deprecated) torify script. Closes
  8023. ticket 6892.
  8024. Changes in version 0.3.0.8 - 2017-06-08
  8025. Tor 0.3.0.8 fixes a pair of bugs that would allow an attacker to
  8026. remotely crash a hidden service with an assertion failure. Anyone
  8027. running a hidden service should upgrade to this version, or to some
  8028. other version with fixes for TROVE-2017-004 and TROVE-2017-005.
  8029. Tor 0.3.0.8 also includes fixes for several key management bugs
  8030. that sometimes made relays unreliable, as well as several other
  8031. bugfixes described below.
  8032. o Major bugfixes (hidden service, relay, security, backport
  8033. from 0.3.1.3-alpha):
  8034. - Fix a remotely triggerable assertion failure when a hidden service
  8035. handles a malformed BEGIN cell. Fixes bug 22493, tracked as
  8036. TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
  8037. - Fix a remotely triggerable assertion failure caused by receiving a
  8038. BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
  8039. 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
  8040. on 0.2.2.1-alpha.
  8041. o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
  8042. - When performing the v3 link handshake on a TLS connection, report
  8043. that we have the x509 certificate that we actually used on that
  8044. connection, even if we have changed certificates since that
  8045. connection was first opened. Previously, we would claim to have
  8046. used our most recent x509 link certificate, which would sometimes
  8047. make the link handshake fail. Fixes one case of bug 22460; bugfix
  8048. on 0.2.3.6-alpha.
  8049. o Major bugfixes (relays, key management, backport from 0.3.1.3-alpha):
  8050. - Regenerate link and authentication certificates whenever the key
  8051. that signs them changes; also, regenerate link certificates
  8052. whenever the signed key changes. Previously, these processes were
  8053. only weakly coupled, and we relays could (for minutes to hours)
  8054. wind up with an inconsistent set of keys and certificates, which
  8055. other relays would not accept. Fixes two cases of bug 22460;
  8056. bugfix on 0.3.0.1-alpha.
  8057. - When sending an Ed25519 signing->link certificate in a CERTS cell,
  8058. send the certificate that matches the x509 certificate that we
  8059. used on the TLS connection. Previously, there was a race condition
  8060. if the TLS context rotated after we began the TLS handshake but
  8061. before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
  8062. on 0.3.0.1-alpha.
  8063. o Major bugfixes (hidden service v3, backport from 0.3.1.1-alpha):
  8064. - Stop rejecting v3 hidden service descriptors because their size
  8065. did not match an old padding rule. Fixes bug 22447; bugfix on
  8066. 0.3.0.1-alpha.
  8067. o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
  8068. - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
  8069. December 2016 (of which ~126 were still functional) with a list of
  8070. 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
  8071. 2017. Resolves ticket 21564.
  8072. o Minor bugfixes (configuration, backport from 0.3.1.1-alpha):
  8073. - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
  8074. bug 22252; bugfix on 0.2.9.3-alpha.
  8075. o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
  8076. - Avoid undefined behavior when parsing IPv6 entries from the geoip6
  8077. file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
  8078. o Minor bugfixes (link handshake, backport from 0.3.1.3-alpha):
  8079. - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
  8080. months, and regenerate it when it is within one month of expiring.
  8081. Previously, we had generated this certificate at startup with a
  8082. ten-year lifetime, but that could lead to weird behavior when Tor
  8083. was started with a grossly inaccurate clock. Mitigates bug 22466;
  8084. mitigation on 0.3.0.1-alpha.
  8085. o Minor bugfixes (memory leak, directory authority, backport from
  8086. 0.3.1.2-alpha):
  8087. - When directory authorities reject a router descriptor due to
  8088. keypinning, free the router descriptor rather than leaking the
  8089. memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
  8090. Changes in version 0.2.9.11 - 2017-06-08
  8091. Tor 0.2.9.11 backports a fix for a bug that would allow an attacker to
  8092. remotely crash a hidden service with an assertion failure. Anyone
  8093. running a hidden service should upgrade to this version, or to some
  8094. other version with fixes for TROVE-2017-005. (Versions before 0.3.0
  8095. are not affected by TROVE-2017-004.)
  8096. Tor 0.2.9.11 also backports fixes for several key management bugs
  8097. that sometimes made relays unreliable, as well as several other
  8098. bugfixes described below.
  8099. o Major bugfixes (hidden service, relay, security, backport
  8100. from 0.3.1.3-alpha):
  8101. - Fix a remotely triggerable assertion failure caused by receiving a
  8102. BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
  8103. 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
  8104. on 0.2.2.1-alpha.
  8105. o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
  8106. - When performing the v3 link handshake on a TLS connection, report
  8107. that we have the x509 certificate that we actually used on that
  8108. connection, even if we have changed certificates since that
  8109. connection was first opened. Previously, we would claim to have
  8110. used our most recent x509 link certificate, which would sometimes
  8111. make the link handshake fail. Fixes one case of bug 22460; bugfix
  8112. on 0.2.3.6-alpha.
  8113. o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
  8114. - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
  8115. December 2016 (of which ~126 were still functional) with a list of
  8116. 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
  8117. 2017. Resolves ticket 21564.
  8118. o Minor features (future-proofing, backport from 0.3.0.7):
  8119. - Tor no longer refuses to download microdescriptors or descriptors if
  8120. they are listed as "published in the future". This change will
  8121. eventually allow us to stop listing meaningful "published" dates
  8122. in microdescriptor consensuses, and thereby allow us to reduce the
  8123. resources required to download consensus diffs by over 50%.
  8124. Implements part of ticket 21642; implements part of proposal 275.
  8125. o Minor features (directory authorities, backport from 0.3.0.4-rc)
  8126. - Directory authorities now reject relays running versions
  8127. 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
  8128. suffer from bug 20499 and don't keep their consensus cache
  8129. up-to-date. Resolves ticket 20509.
  8130. o Minor features (geoip):
  8131. - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
  8132. Country database.
  8133. o Minor bugfixes (control port, backport from 0.3.0.6):
  8134. - The GETINFO extra-info/digest/<digest> command was broken because
  8135. of a wrong base16 decode return value check, introduced when
  8136. refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
  8137. o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
  8138. - Avoid undefined behavior when parsing IPv6 entries from the geoip6
  8139. file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
  8140. o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.0.7):
  8141. - The getpid() system call is now permitted under the Linux seccomp2
  8142. sandbox, to avoid crashing with versions of OpenSSL (and other
  8143. libraries) that attempt to learn the process's PID by using the
  8144. syscall rather than the VDSO code. Fixes bug 21943; bugfix
  8145. on 0.2.5.1-alpha.
  8146. o Minor bugfixes (memory leak, directory authority, backport
  8147. from 0.3.1.2-alpha):
  8148. - When directory authorities reject a router descriptor due to
  8149. keypinning, free the router descriptor rather than leaking the
  8150. memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
  8151. Changes in version 0.2.8.14 - 2017-06-08
  8152. Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
  8153. remotely crash a hidden service with an assertion failure. Anyone
  8154. running a hidden service should upgrade to this version, or to some
  8155. other version with fixes for TROVE-2017-005. (Versions before 0.3.0
  8156. are not affected by TROVE-2017-004.)
  8157. o Major bugfixes (hidden service, relay, security):
  8158. - Fix a remotely triggerable assertion failure caused by receiving a
  8159. BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
  8160. 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
  8161. on 0.2.2.1-alpha.
  8162. o Minor features (geoip):
  8163. - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
  8164. Country database.
  8165. o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
  8166. - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
  8167. December 2016 (of which ~126 were still functional) with a list of
  8168. 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
  8169. 2017. Resolves ticket 21564.
  8170. o Minor bugfixes (correctness):
  8171. - Avoid undefined behavior when parsing IPv6 entries from the geoip6
  8172. file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
  8173. Changes in version 0.2.7.8 - 2017-06-08
  8174. Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
  8175. remotely crash a hidden service with an assertion failure. Anyone
  8176. running a hidden service should upgrade to this version, or to some
  8177. other version with fixes for TROVE-2017-005. (Versions before 0.3.0
  8178. are not affected by TROVE-2017-004.)
  8179. o Major bugfixes (hidden service, relay, security):
  8180. - Fix a remotely triggerable assertion failure caused by receiving a
  8181. BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
  8182. 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
  8183. on 0.2.2.1-alpha.
  8184. o Minor features (geoip):
  8185. - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
  8186. Country database.
  8187. o Minor bugfixes (correctness):
  8188. - Avoid undefined behavior when parsing IPv6 entries from the geoip6
  8189. file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
  8190. Changes in version 0.2.6.12 - 2017-06-08
  8191. Tor 0.2.6.12 backports a fix for a bug that would allow an attacker to
  8192. remotely crash a hidden service with an assertion failure. Anyone
  8193. running a hidden service should upgrade to this version, or to some
  8194. other version with fixes for TROVE-2017-005. (Versions before 0.3.0
  8195. are not affected by TROVE-2017-004.)
  8196. o Major bugfixes (hidden service, relay, security):
  8197. - Fix a remotely triggerable assertion failure caused by receiving a
  8198. BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
  8199. 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
  8200. on 0.2.2.1-alpha.
  8201. o Minor features (geoip):
  8202. - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
  8203. Country database.
  8204. o Minor bugfixes (correctness):
  8205. - Avoid undefined behavior when parsing IPv6 entries from the geoip6
  8206. file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
  8207. Changes in version 0.2.5.14 - 2017-06-08
  8208. Tor 0.2.5.14 backports a fix for a bug that would allow an attacker to
  8209. remotely crash a hidden service with an assertion failure. Anyone
  8210. running a hidden service should upgrade to this version, or to some
  8211. other version with fixes for TROVE-2017-005. (Versions before 0.3.0
  8212. are not affected by TROVE-2017-004.)
  8213. o Major bugfixes (hidden service, relay, security):
  8214. - Fix a remotely triggerable assertion failure caused by receiving a
  8215. BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
  8216. 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
  8217. on 0.2.2.1-alpha.
  8218. o Minor features (geoip):
  8219. - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
  8220. Country database.
  8221. o Minor bugfixes (correctness):
  8222. - Avoid undefined behavior when parsing IPv6 entries from the geoip6
  8223. file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
  8224. Changes in version 0.2.4.29 - 2017-06-08
  8225. Tor 0.2.4.29 backports a fix for a bug that would allow an attacker to
  8226. remotely crash a hidden service with an assertion failure. Anyone
  8227. running a hidden service should upgrade to this version, or to some
  8228. other version with fixes for TROVE-2017-005. (Versions before 0.3.0
  8229. are not affected by TROVE-2017-004.)
  8230. o Major bugfixes (hidden service, relay, security):
  8231. - Fix a remotely triggerable assertion failure caused by receiving a
  8232. BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
  8233. 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
  8234. on 0.2.2.1-alpha.
  8235. o Minor features (geoip):
  8236. - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
  8237. Country database.
  8238. o Minor bugfixes (correctness):
  8239. - Avoid undefined behavior when parsing IPv6 entries from the geoip6
  8240. file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
  8241. Changes in version 0.3.1.2-alpha - 2017-05-26
  8242. Tor 0.3.1.2-alpha is the second release in the 0.3.1.x series. It
  8243. fixes a few bugs found while testing 0.3.1.1-alpha, including a
  8244. memory corruption bug that affected relay stability.
  8245. o Major bugfixes (crash, relay):
  8246. - Fix a memory-corruption bug in relays that set MyFamily.
  8247. Previously, they would double-free MyFamily elements when making
  8248. the next descriptor or when changing their configuration. Fixes
  8249. bug 22368; bugfix on 0.3.1.1-alpha.
  8250. o Minor bugfixes (logging):
  8251. - Log a better message when a directory authority replies to an
  8252. upload with an unexpected status code. Fixes bug 11121; bugfix
  8253. on 0.1.0.1-rc.
  8254. o Minor bugfixes (memory leak, directory authority):
  8255. - When directory authorities reject a router descriptor due to
  8256. keypinning, free the router descriptor rather than leaking the
  8257. memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
  8258. Changes in version 0.3.1.1-alpha - 2017-05-22
  8259. Tor 0.3.1.1-alpha is the first release in the 0.3.1.x series. It
  8260. reduces the bandwidth usage for Tor's directory protocol, adds some
  8261. basic padding to resist netflow-based traffic analysis and to serve as
  8262. the basis of other padding in the future, and adds rust support to the
  8263. build system.
  8264. It also contains numerous other small features and improvements to
  8265. security, correctness, and performance.
  8266. Below are the changes since 0.3.0.7.
  8267. o Major features (directory protocol):
  8268. - Tor relays and authorities can now serve clients an abbreviated
  8269. version of the consensus document, containing only the changes
  8270. since an older consensus document that the client holds. Clients
  8271. now request these documents when available. When both client and
  8272. server use this new protocol, they will use far less bandwidth (up
  8273. to 94% less) to keep the client's consensus up-to-date. Implements
  8274. proposal 140; closes ticket 13339. Based on work by Daniel Martí.
  8275. - Tor can now compress directory traffic with lzma or with zstd
  8276. compression algorithms, which can deliver better bandwidth
  8277. performance. Because lzma is computationally expensive, it's only
  8278. used for documents that can be compressed once and served many
  8279. times. Support for these algorithms requires that tor is built
  8280. with the libzstd and/or liblzma libraries available. Implements
  8281. proposal 278; closes ticket 21662.
  8282. - Relays now perform the more expensive compression operations, and
  8283. consensus diff generation, in worker threads. This separation
  8284. avoids delaying the main thread when a new consensus arrives.
  8285. o Major features (experimental):
  8286. - Tor can now build modules written in Rust. To turn this on, pass
  8287. the "--enable-rust" flag to the configure script. It's not time to
  8288. get excited yet: currently, there is no actual Rust functionality
  8289. beyond some simple glue code, and a notice at startup to tell you
  8290. that Rust is running. Still, we hope that programmers and
  8291. packagers will try building Tor with Rust support, so that we can
  8292. find issues and solve portability problems. Closes ticket 22106.
  8293. o Major features (traffic analysis resistance):
  8294. - Connections between clients and relays now send a padding cell in
  8295. each direction every 1.5 to 9.5 seconds (tunable via consensus
  8296. parameters). This padding will not resist specialized
  8297. eavesdroppers, but it should be enough to make many ISPs' routine
  8298. network flow logging less useful in traffic analysis against
  8299. Tor users.
  8300. Padding is negotiated using Tor's link protocol, so both relays
  8301. and clients must upgrade for this to take effect. Clients may
  8302. still send padding despite the relay's version by setting
  8303. ConnectionPadding 1 in torrc, and may disable padding by setting
  8304. ConnectionPadding 0 in torrc. Padding may be minimized for mobile
  8305. users with the torrc option ReducedConnectionPadding. Implements
  8306. Proposal 251 and Section 2 of Proposal 254; closes ticket 16861.
  8307. - Relays will publish 24 hour totals of padding and non-padding cell
  8308. counts to their extra-info descriptors, unless PaddingStatistics 0
  8309. is set in torrc. These 24 hour totals are also rounded to
  8310. multiples of 10000.
  8311. o Major bugfixes (connection usage):
  8312. - We use NETINFO cells to try to determine if both relays involved
  8313. in a connection will agree on the canonical status of that
  8314. connection. We prefer the connections where this is the case for
  8315. extend cells, and try to close connections where relays disagree
  8316. on their canonical status early. Also, we now prefer the oldest
  8317. valid connection for extend cells. These two changes should reduce
  8318. the number of long-term connections that are kept open between
  8319. relays. Fixes bug 17604; bugfix on 0.2.5.5-alpha.
  8320. - Relays now log hourly statistics (look for
  8321. "channel_check_for_duplicates" lines) on the total number of
  8322. connections to other relays. If the number of connections per
  8323. relay is unexpectedly large, this log message is at notice level.
  8324. Otherwise it is at info.
  8325. o Major bugfixes (entry guards):
  8326. - Don't block bootstrapping when a primary bridge is offline and we
  8327. can't get its descriptor. Fixes bug 22325; fixes one case of bug
  8328. 21969; bugfix on 0.3.0.3-alpha.
  8329. o Major bugfixes (linux TPROXY support):
  8330. - Fix a typo that had prevented TPROXY-based transparent proxying
  8331. from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
  8332. Patch from "d4fq0fQAgoJ".
  8333. o Minor features (security, windows):
  8334. - Enable a couple of pieces of Windows hardening: one
  8335. (HeapEnableTerminationOnCorruption) that has been on-by-default
  8336. since Windows 8, and unavailable before Windows 7; and one
  8337. (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
  8338. affect us, but shouldn't do any harm. Closes ticket 21953.
  8339. o Minor features (config options):
  8340. - Allow "%include" directives in torrc configuration files. These
  8341. directives import the settings from other files, or from all the
  8342. files in a directory. Closes ticket 1922. Code by Daniel Pinto.
  8343. - Make SAVECONF return an error when overwriting a torrc that has
  8344. includes. Using SAVECONF with the FORCE option will allow it to
  8345. overwrite torrc even if includes are used. Related to ticket 1922.
  8346. - Add "GETINFO config-can-saveconf" to tell controllers if SAVECONF
  8347. will work without the FORCE option. Related to ticket 1922.
  8348. o Minor features (controller):
  8349. - Warn the first time that a controller requests data in the long-
  8350. deprecated 'GETINFO network-status' format. Closes ticket 21703.
  8351. o Minor features (defaults):
  8352. - The default value for UseCreateFast is now 0: clients which
  8353. haven't yet received a consensus document will now use a proper
  8354. ntor handshake to talk to their directory servers whenever they
  8355. can. Closes ticket 21407.
  8356. - Onion key rotation and expiry intervals are now defined as a
  8357. network consensus parameter, per proposal 274. The default
  8358. lifetime of an onion key is increased from 7 to 28 days. Old onion
  8359. keys will expire after 7 days by default. This change will make
  8360. consensus diffs much smaller, and save significant bandwidth.
  8361. Closes ticket 21641.
  8362. o Minor features (fallback directory list):
  8363. - Update the fallback directory mirror whitelist and blacklist based
  8364. on operator emails. Closes task 21121.
  8365. - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
  8366. December 2016 (of which ~126 were still functional) with a list of
  8367. 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
  8368. 2017. Resolves ticket 21564.
  8369. o Minor features (hidden services, logging):
  8370. - Log a message when a hidden service descriptor has fewer
  8371. introduction points than specified in
  8372. HiddenServiceNumIntroductionPoints. Closes tickets 21598.
  8373. - Log a message when a hidden service reaches its introduction point
  8374. circuit limit, and when that limit is reset. Follow up to ticket
  8375. 21594; closes ticket 21622.
  8376. - Warn user if multiple entries in EntryNodes and at least one
  8377. HiddenService are used together. Pinning EntryNodes along with a
  8378. hidden service can be possibly harmful; for instance see ticket
  8379. 14917 or 21155. Closes ticket 21155.
  8380. o Minor features (linux seccomp2 sandbox):
  8381. - We now have a document storage backend compatible with the Linux
  8382. seccomp2 sandbox. This backend is used for consensus documents and
  8383. diffs between them; in the long term, we'd like to use it for
  8384. unparseable directory material too. Closes ticket 21645
  8385. - Increase the maximum allowed size passed to mprotect(PROT_WRITE)
  8386. from 1MB to 16MB. This was necessary with the glibc allocator in
  8387. order to allow worker threads to allocate more memory -- which in
  8388. turn is necessary because of our new use of worker threads for
  8389. compression. Closes ticket 22096.
  8390. o Minor features (logging):
  8391. - Log files are no longer created world-readable by default.
  8392. (Previously, most distributors would store the logs in a non-
  8393. world-readable location to prevent inappropriate access. This
  8394. change is an extra precaution.) Closes ticket 21729; patch
  8395. from toralf.
  8396. o Minor features (performance):
  8397. - Our Keccak (SHA-3) implementation now accesses memory more
  8398. efficiently, especially on little-endian systems. Closes
  8399. ticket 21737.
  8400. - Add an O(1) implementation of channel_find_by_global_id(), to
  8401. speed some controller functions.
  8402. o Minor features (relay, configuration):
  8403. - The MyFamily option may now be repeated as many times as desired,
  8404. for relays that want to configure large families. Closes ticket
  8405. 4998; patch by Daniel Pinto.
  8406. o Minor features (safety):
  8407. - Add an explicit check to extrainfo_parse_entry_from_string() for
  8408. NULL inputs. We don't believe this can actually happen, but it may
  8409. help silence a warning from the Clang analyzer. Closes
  8410. ticket 21496.
  8411. o Minor features (testing):
  8412. - Add a "--disable-memory-sentinels" feature to help with fuzzing.
  8413. When Tor is compiled with this option, we disable a number of
  8414. redundant memory-safety failsafes that are intended to stop bugs
  8415. from becoming security issues. This makes it easier to hunt for
  8416. bugs that would be security issues without the failsafes turned
  8417. on. Closes ticket 21439.
  8418. - Add a general event-tracing instrumentation support to Tor. This
  8419. subsystem will enable developers and researchers to add fine-
  8420. grained instrumentation to their Tor instances, for use when
  8421. examining Tor network performance issues. There are no trace
  8422. events yet, and event-tracing is off by default unless enabled at
  8423. compile time. Implements ticket 13802.
  8424. - Improve our version parsing tests: add tests for typical version
  8425. components, add tests for invalid versions, including numeric
  8426. range and non-numeric prefixes. Unit tests 21278, 21450, and
  8427. 21507. Partially implements 21470.
  8428. o Minor bugfixes (bandwidth accounting):
  8429. - Roll over monthly accounting at the configured hour and minute,
  8430. rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
  8431. Found by Andrey Karpov with PVS-Studio.
  8432. o Minor bugfixes (code correctness):
  8433. - Accurately identify client connections by their lack of peer
  8434. authentication. This means that we bail out earlier if asked to
  8435. extend to a client. Follow-up to 21407. Fixes bug 21406; bugfix
  8436. on 0.2.4.23.
  8437. o Minor bugfixes (configuration):
  8438. - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
  8439. bug 22252; bugfix on 0.2.9.3-alpha.
  8440. o Minor bugfixes (connection lifespan):
  8441. - Allow more control over how long TLS connections are kept open:
  8442. unify CircuitIdleTimeout and PredictedPortsRelevanceTime into a
  8443. single option called CircuitsAvailableTimeout. Also, allow the
  8444. consensus to control the default values for both this preference
  8445. and the lifespan of relay-to-relay connections. Fixes bug 17592;
  8446. bugfix on 0.2.5.5-alpha.
  8447. - Increase the initial circuit build timeout testing frequency, to
  8448. help ensure that ReducedConnectionPadding clients finish learning
  8449. a timeout before their orconn would expire. The initial testing
  8450. rate was set back in the days of TAP and before the Tor Browser
  8451. updater, when we had to be much more careful about new clients
  8452. making lots of circuits. With this change, a circuit build timeout
  8453. is learned in about 15-20 minutes, instead of 100-120 minutes.
  8454. o Minor bugfixes (controller):
  8455. - GETINFO onions/current and onions/detached no longer respond with
  8456. 551 on empty lists. Fixes bug 21329; bugfix on 0.2.7.1-alpha.
  8457. - Trigger HS descriptor events on the control port when the client
  8458. fails to pick a hidden service directory for a hidden service.
  8459. This can happen if all the hidden service directories are in
  8460. ExcludeNodes, or they have all been queried within the last 15
  8461. minutes. Fixes bug 22042; bugfix on 0.2.5.2-alpha.
  8462. o Minor bugfixes (directory authority):
  8463. - When rejecting a router descriptor for running an obsolete version
  8464. of Tor without ntor support, warn about the obsolete tor version,
  8465. not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.
  8466. - Prevent the shared randomness subsystem from asserting when
  8467. initialized by a bridge authority with an incomplete configuration
  8468. file. Fixes bug 21586; bugfix on 0.2.9.8.
  8469. o Minor bugfixes (exit-side DNS):
  8470. - Fix an untriggerable assertion that checked the output of a
  8471. libevent DNS error, so that the assertion actually behaves as
  8472. expected. Fixes bug 22244; bugfix on 0.2.0.20-rc. Found by Andrey
  8473. Karpov using PVS-Studio.
  8474. o Minor bugfixes (fallback directories):
  8475. - Make the usage example in updateFallbackDirs.py actually work, and
  8476. explain what it does. Fixes bug 22270; bugfix on 0.3.0.3-alpha.
  8477. - Decrease the guard flag average required to be a fallback. This
  8478. allows us to keep relays that have their guard flag removed when
  8479. they restart. Fixes bug 20913; bugfix on 0.2.8.1-alpha.
  8480. - Decrease the minimum number of fallbacks to 100. Fixes bug 20913;
  8481. bugfix on 0.2.8.1-alpha.
  8482. - Make sure fallback directory mirrors have the same address, port,
  8483. and relay identity key for at least 30 days before they are
  8484. selected. Fixes bug 20913; bugfix on 0.2.8.1-alpha.
  8485. o Minor bugfixes (hidden services):
  8486. - Stop printing a cryptic warning when a hidden service gets a
  8487. request to connect to a virtual port that it hasn't configured.
  8488. Fixes bug 16706; bugfix on 0.2.6.3-alpha.
  8489. - Simplify hidden service descriptor creation by using an existing
  8490. flag to check if an introduction point is established. Fixes bug
  8491. 21599; bugfix on 0.2.7.2-alpha.
  8492. o Minor bugfixes (memory leak):
  8493. - Fix a small memory leak at exit from the backtrace handler code.
  8494. Fixes bug 21788; bugfix on 0.2.5.2-alpha. Patch from Daniel Pinto.
  8495. o Minor bugfixes (protocol, logging):
  8496. - Downgrade a log statement about unexpected relay cells from "bug"
  8497. to "protocol warning", because there is at least one use case
  8498. where it can be triggered by a buggy tor implementation. Fixes bug
  8499. 21293; bugfix on 0.1.1.14-alpha.
  8500. o Minor bugfixes (testing):
  8501. - Use unbuffered I/O for utility functions around the
  8502. process_handle_t type. This fixes unit test failures reported on
  8503. OpenBSD and FreeBSD. Fixes bug 21654; bugfix on 0.2.3.1-alpha.
  8504. - Make display of captured unit test log messages consistent. Fixes
  8505. bug 21510; bugfix on 0.2.9.3-alpha.
  8506. - Make test-network.sh always call chutney's test-network.sh.
  8507. Previously, this only worked on systems which had bash installed,
  8508. due to some bash-specific code in the script. Fixes bug 19699;
  8509. bugfix on 0.3.0.4-rc. Follow-up to ticket 21581.
  8510. o Minor bugfixes (voting consistency):
  8511. - Reject version numbers with non-numeric prefixes (such as +, -, or
  8512. whitespace). Disallowing whitespace prevents differential version
  8513. parsing between POSIX-based and Windows platforms. Fixes bug 21507
  8514. and part of 21508; bugfix on 0.0.8pre1.
  8515. o Minor bugfixes (windows, relay):
  8516. - Resolve "Failure from drain_fd: No error" warnings on Windows
  8517. relays. Fixes bug 21540; bugfix on 0.2.6.3-alpha.
  8518. o Code simplification and refactoring:
  8519. - Break up the 630-line function connection_dir_client_reached_eof()
  8520. into a dozen smaller functions. This change should help
  8521. maintainability and readability of the client directory code.
  8522. - Isolate our use of the openssl headers so that they are only
  8523. included from our crypto wrapper modules, and from tests that
  8524. examine those modules' internals. Closes ticket 21841.
  8525. - Simplify our API to launch directory requests, making it more
  8526. extensible and less error-prone. Now it's easier to add extra
  8527. headers to directory requests. Closes ticket 21646.
  8528. - Our base64 decoding functions no longer overestimate the output
  8529. space that they need when parsing unpadded inputs. Closes
  8530. ticket 17868.
  8531. - Remove unused "ROUTER_ADDED_NOTIFY_GENERATOR" internal value.
  8532. Resolves ticket 22213.
  8533. - The logic that directory caches use to spool request to clients,
  8534. serving them one part at a time so as not to allocate too much
  8535. memory, has been refactored for consistency. Previously there was
  8536. a separate spooling implementation per type of spoolable data. Now
  8537. there is one common spooling implementation, with extensible data
  8538. types. Closes ticket 21651.
  8539. - Tor's compression module now supports multiple backends. Part of
  8540. the implementation for proposal 278; closes ticket 21663.
  8541. o Documentation:
  8542. - Clarify the behavior of the KeepAliveIsolateSOCKSAuth sub-option.
  8543. Closes ticket 21873.
  8544. - Correct documentation about the default DataDirectory value.
  8545. Closes ticket 21151.
  8546. - Document the default behavior of NumEntryGuards and
  8547. NumDirectoryGuards correctly. Fixes bug 21715; bugfix
  8548. on 0.3.0.1-alpha.
  8549. - Document key=value pluggable transport arguments for Bridge lines
  8550. in torrc. Fixes bug 20341; bugfix on 0.2.5.1-alpha.
  8551. - Note that bandwidth-limiting options don't affect TCP headers or
  8552. DNS. Closes ticket 17170.
  8553. o Removed features (configuration options, all in ticket 22060):
  8554. - These configuration options are now marked Obsolete, and no longer
  8555. have any effect: AllowInvalidNodes, AllowSingleHopCircuits,
  8556. AllowSingleHopExits, ExcludeSingleHopRelays, FastFirstHopPK,
  8557. TLSECGroup, WarnUnsafeSocks. They were first marked as deprecated
  8558. in 0.2.9.2-alpha and have now been removed. The previous default
  8559. behavior is now always chosen; the previous (less secure) non-
  8560. default behavior is now unavailable.
  8561. - CloseHSClientCircuitsImmediatelyOnTimeout and
  8562. CloseHSServiceRendCircuitsImmediatelyOnTimeout were deprecated in
  8563. 0.2.9.2-alpha and now have been removed. HS circuits never close
  8564. on circuit build timeout; they have a longer timeout period.
  8565. - {Control,DNS,Dir,Socks,Trans,NATD,OR}ListenAddress were deprecated
  8566. in 0.2.9.2-alpha and now have been removed. Use the ORPort option
  8567. (and others) to configure listen-only and advertise-only addresses.
  8568. o Removed features (tools):
  8569. - We've removed the tor-checkkey tool from src/tools. Long ago, we
  8570. used it to help people detect RSA keys that were generated by
  8571. versions of Debian affected by CVE-2008-0166. But those keys have
  8572. been out of circulation for ages, and this tool is no longer
  8573. required. Closes ticket 21842.
  8574. Changes in version 0.3.0.7 - 2017-05-15
  8575. Tor 0.3.0.7 fixes a medium-severity security bug in earlier versions
  8576. of Tor 0.3.0.x, where an attacker could cause a Tor relay process
  8577. to exit. Relays running earlier versions of Tor 0.3.0.x should upgrade;
  8578. clients are not affected.
  8579. o Major bugfixes (hidden service directory, security):
  8580. - Fix an assertion failure in the hidden service directory code, which
  8581. could be used by an attacker to remotely cause a Tor relay process to
  8582. exit. Relays running earlier versions of Tor 0.3.0.x should upgrade.
  8583. should upgrade. This security issue is tracked as TROVE-2017-002.
  8584. Fixes bug 22246; bugfix on 0.3.0.1-alpha.
  8585. o Minor features:
  8586. - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
  8587. Country database.
  8588. o Minor features (future-proofing):
  8589. - Tor no longer refuses to download microdescriptors or descriptors
  8590. if they are listed as "published in the future". This change will
  8591. eventually allow us to stop listing meaningful "published" dates
  8592. in microdescriptor consensuses, and thereby allow us to reduce the
  8593. resources required to download consensus diffs by over 50%.
  8594. Implements part of ticket 21642; implements part of proposal 275.
  8595. o Minor bugfixes (Linux seccomp2 sandbox):
  8596. - The getpid() system call is now permitted under the Linux seccomp2
  8597. sandbox, to avoid crashing with versions of OpenSSL (and other
  8598. libraries) that attempt to learn the process's PID by using the
  8599. syscall rather than the VDSO code. Fixes bug 21943; bugfix
  8600. on 0.2.5.1-alpha.
  8601. Changes in version 0.3.0.6 - 2017-04-26
  8602. Tor 0.3.0.6 is the first stable release of the Tor 0.3.0 series.
  8603. With the 0.3.0 series, clients and relays now use Ed25519 keys to
  8604. authenticate their link connections to relays, rather than the old
  8605. RSA1024 keys that they used before. (Circuit crypto has been
  8606. Curve25519-authenticated since 0.2.4.8-alpha.) We have also replaced
  8607. the guard selection and replacement algorithm to behave more robustly
  8608. in the presence of unreliable networks, and to resist guard-
  8609. capture attacks.
  8610. This series also includes numerous other small features and bugfixes,
  8611. along with more groundwork for the upcoming hidden-services revamp.
  8612. Per our stable release policy, we plan to support the Tor 0.3.0
  8613. release series for at least the next nine months, or for three months
  8614. after the first stable release of the 0.3.1 series: whichever is
  8615. longer. If you need a release with long-term support, we recommend
  8616. that you stay with the 0.2.9 series.
  8617. Below are the changes since 0.3.0.5-rc. For a list of all changes
  8618. since 0.2.9, see the ReleaseNotes file.
  8619. o Minor features (geoip):
  8620. - Update geoip and geoip6 to the April 4 2017 Maxmind GeoLite2
  8621. Country database.
  8622. o Minor bugfixes (control port):
  8623. - The GETINFO extra-info/digest/<digest> command was broken because
  8624. of a wrong base16 decode return value check, introduced when
  8625. refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
  8626. o Minor bugfixes (crash prevention):
  8627. - Fix a (currently untriggerable, but potentially dangerous) crash
  8628. bug when base32-encoding inputs whose sizes are not a multiple of
  8629. 5. Fixes bug 21894; bugfix on 0.2.9.1-alpha.
  8630. Changes in version 0.3.0.5-rc - 2017-04-05
  8631. Tor 0.3.0.5-rc fixes a few remaining bugs, large and small, in the
  8632. 0.3.0 release series.
  8633. This is the second release candidate in the Tor 0.3.0 series, and has
  8634. much fewer changes than the first. If we find no new bugs or
  8635. regressions here, the first stable 0.3.0 release will be nearly
  8636. identical to it.
  8637. o Major bugfixes (crash, directory connections):
  8638. - Fix a rare crash when sending a begin cell on a circuit whose
  8639. linked directory connection had already been closed. Fixes bug
  8640. 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.
  8641. o Major bugfixes (guard selection):
  8642. - Fix a guard selection bug where Tor would refuse to bootstrap in
  8643. some cases if the user swapped a bridge for another bridge in
  8644. their configuration file. Fixes bug 21771; bugfix on 0.3.0.1-alpha.
  8645. Reported by "torvlnt33r".
  8646. o Minor features (geoip):
  8647. - Update geoip and geoip6 to the March 7 2017 Maxmind GeoLite2
  8648. Country database.
  8649. o Minor bugfix (compilation):
  8650. - Fix a warning when compiling hs_service.c. Previously, it had no
  8651. exported symbols when compiled for libor.a, resulting in a
  8652. compilation warning from clang. Fixes bug 21825; bugfix
  8653. on 0.3.0.1-alpha.
  8654. o Minor bugfixes (hidden services):
  8655. - Make hidden services check for failed intro point connections,
  8656. even when they have exceeded their intro point creation limit.
  8657. Fixes bug 21596; bugfix on 0.2.7.2-alpha. Reported by Alec Muffett.
  8658. - Make hidden services with 8 to 10 introduction points check for
  8659. failed circuits immediately after startup. Previously, they would
  8660. wait for 5 minutes before performing their first checks. Fixes bug
  8661. 21594; bugfix on 0.2.3.9-alpha. Reported by Alec Muffett.
  8662. o Minor bugfixes (memory leaks):
  8663. - Fix a memory leak when using GETCONF on a port option. Fixes bug
  8664. 21682; bugfix on 0.3.0.3-alpha.
  8665. o Minor bugfixes (relay):
  8666. - Avoid a double-marked-circuit warning that could happen when we
  8667. receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
  8668. on 0.1.0.1-rc.
  8669. o Minor bugfixes (tests):
  8670. - Run the entry_guard_parse_from_state_full() test with the time set
  8671. to a specific date. (The guard state that this test was parsing
  8672. contained guards that had expired since the test was first
  8673. written.) Fixes bug 21799; bugfix on 0.3.0.1-alpha.
  8674. o Documentation:
  8675. - Update the description of the directory server options in the
  8676. manual page, to clarify that a relay no longer needs to set
  8677. DirPort in order to be a directory cache. Closes ticket 21720.
  8678. Changes in version 0.2.8.13 - 2017-03-03
  8679. Tor 0.2.8.13 backports a security fix from later Tor
  8680. releases. Anybody running Tor 0.2.8.12 or earlier should upgrade to this
  8681. this release, if for some reason they cannot upgrade to a later
  8682. release series, and if they build Tor with the --enable-expensive-hardening
  8683. option.
  8684. Note that support for Tor 0.2.8.x is ending next year: we will not issue
  8685. any fixes for the Tor 0.2.8.x series after 1 Jan 2018. If you need
  8686. a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
  8687. o Major bugfixes (parsing, backported from 0.3.0.4-rc):
  8688. - Fix an integer underflow bug when comparing malformed Tor
  8689. versions. This bug could crash Tor when built with
  8690. --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
  8691. 0.2.9.8, which were built with -ftrapv by default. In other cases
  8692. it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
  8693. on 0.0.8pre1. Found by OSS-Fuzz.
  8694. o Minor features (geoip):
  8695. - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
  8696. Country database.
  8697. Changes in version 0.2.7.7 - 2017-03-03
  8698. Tor 0.2.7.7 backports a number of security fixes from later Tor
  8699. releases. Anybody running Tor 0.2.7.6 or earlier should upgrade to
  8700. this release, if for some reason they cannot upgrade to a later
  8701. release series.
  8702. Note that support for Tor 0.2.7.x is ending this year: we will not issue
  8703. any fixes for the Tor 0.2.7.x series after 1 August 2017. If you need
  8704. a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
  8705. o Directory authority changes (backport from 0.2.8.5-rc):
  8706. - Urras is no longer a directory authority. Closes ticket 19271.
  8707. o Directory authority changes (backport from 0.2.9.2-alpha):
  8708. - The "Tonga" bridge authority has been retired; the new bridge
  8709. authority is "Bifroest". Closes tickets 19728 and 19690.
  8710. o Directory authority key updates (backport from 0.2.8.1-alpha):
  8711. - Update the V3 identity key for the dannenberg directory authority:
  8712. it was changed on 18 November 2015. Closes task 17906. Patch
  8713. by "teor".
  8714. o Major bugfixes (parsing, security, backport from 0.2.9.8):
  8715. - Fix a bug in parsing that could cause clients to read a single
  8716. byte past the end of an allocated region. This bug could be used
  8717. to cause hardened clients (built with --enable-expensive-hardening)
  8718. to crash if they tried to visit a hostile hidden service. Non-
  8719. hardened clients are only affected depending on the details of
  8720. their platform's memory allocator. Fixes bug 21018; bugfix on
  8721. 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
  8722. 2016-12-002 and as CVE-2016-1254.
  8723. o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
  8724. - Stop a crash that could occur when a client running with DNSPort
  8725. received a query with multiple address types, and the first
  8726. address type was not supported. Found and fixed by Scott Dial.
  8727. Fixes bug 18710; bugfix on 0.2.5.4-alpha.
  8728. - Prevent a class of security bugs caused by treating the contents
  8729. of a buffer chunk as if they were a NUL-terminated string. At
  8730. least one such bug seems to be present in all currently used
  8731. versions of Tor, and would allow an attacker to remotely crash
  8732. most Tor instances, especially those compiled with extra compiler
  8733. hardening. With this defense in place, such bugs can't crash Tor,
  8734. though we should still fix them as they occur. Closes ticket
  8735. 20384 (TROVE-2016-10-001).
  8736. o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
  8737. - Avoid a difficult-to-trigger heap corruption attack when extending
  8738. a smartlist to contain over 16GB of pointers. Fixes bug 18162;
  8739. bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
  8740. Reported by Guido Vranken.
  8741. o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
  8742. - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
  8743. bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
  8744. o Major bugfixes (key management, backport from 0.2.8.3-alpha):
  8745. - If OpenSSL fails to generate an RSA key, do not retain a dangling
  8746. pointer to the previous (uninitialized) key value. The impact here
  8747. should be limited to a difficult-to-trigger crash, if OpenSSL is
  8748. running an engine that makes key generation failures possible, or
  8749. if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
  8750. 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
  8751. Baishakhi Ray.
  8752. o Major bugfixes (parsing, backported from 0.3.0.4-rc):
  8753. - Fix an integer underflow bug when comparing malformed Tor
  8754. versions. This bug could crash Tor when built with
  8755. --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
  8756. 0.2.9.8, which were built with -ftrapv by default. In other cases
  8757. it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
  8758. on 0.0.8pre1. Found by OSS-Fuzz.
  8759. o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
  8760. - Make memwipe() do nothing when passed a NULL pointer or buffer of
  8761. zero size. Check size argument to memwipe() for underflow. Fixes
  8762. bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
  8763. patch by "teor".
  8764. o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
  8765. - Make Tor survive errors involving connections without a
  8766. corresponding event object. Previously we'd fail with an
  8767. assertion; now we produce a log message. Related to bug 16248.
  8768. o Minor features (geoip):
  8769. - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
  8770. Country database.
  8771. Changes in version 0.2.6.11 - 2017-03-03
  8772. Tor 0.2.6.11 backports a number of security fixes from later Tor
  8773. releases. Anybody running Tor 0.2.6.10 or earlier should upgrade to
  8774. this release, if for some reason they cannot upgrade to a later
  8775. release series.
  8776. Note that support for Tor 0.2.6.x is ending this year: we will not issue
  8777. any fixes for the Tor 0.2.6.x series after 1 August 2017. If you need
  8778. a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
  8779. o Directory authority changes (backport from 0.2.8.5-rc):
  8780. - Urras is no longer a directory authority. Closes ticket 19271.
  8781. o Directory authority changes (backport from 0.2.9.2-alpha):
  8782. - The "Tonga" bridge authority has been retired; the new bridge
  8783. authority is "Bifroest". Closes tickets 19728 and 19690.
  8784. o Directory authority key updates (backport from 0.2.8.1-alpha):
  8785. - Update the V3 identity key for the dannenberg directory authority:
  8786. it was changed on 18 November 2015. Closes task 17906. Patch
  8787. by "teor".
  8788. o Major features (security fixes, backport from 0.2.9.4-alpha):
  8789. - Prevent a class of security bugs caused by treating the contents
  8790. of a buffer chunk as if they were a NUL-terminated string. At
  8791. least one such bug seems to be present in all currently used
  8792. versions of Tor, and would allow an attacker to remotely crash
  8793. most Tor instances, especially those compiled with extra compiler
  8794. hardening. With this defense in place, such bugs can't crash Tor,
  8795. though we should still fix them as they occur. Closes ticket
  8796. 20384 (TROVE-2016-10-001).
  8797. o Major bugfixes (parsing, security, backport from 0.2.9.8):
  8798. - Fix a bug in parsing that could cause clients to read a single
  8799. byte past the end of an allocated region. This bug could be used
  8800. to cause hardened clients (built with --enable-expensive-hardening)
  8801. to crash if they tried to visit a hostile hidden service. Non-
  8802. hardened clients are only affected depending on the details of
  8803. their platform's memory allocator. Fixes bug 21018; bugfix on
  8804. 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
  8805. 2016-12-002 and as CVE-2016-1254.
  8806. o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
  8807. - Stop a crash that could occur when a client running with DNSPort
  8808. received a query with multiple address types, and the first
  8809. address type was not supported. Found and fixed by Scott Dial.
  8810. Fixes bug 18710; bugfix on 0.2.5.4-alpha.
  8811. o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
  8812. - Fix an error that could cause us to read 4 bytes before the
  8813. beginning of an openssl string. This bug could be used to cause
  8814. Tor to crash on systems with unusual malloc implementations, or
  8815. systems with unusual hardening installed. Fixes bug 17404; bugfix
  8816. on 0.2.3.6-alpha.
  8817. o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
  8818. - Avoid a difficult-to-trigger heap corruption attack when extending
  8819. a smartlist to contain over 16GB of pointers. Fixes bug 18162;
  8820. bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
  8821. Reported by Guido Vranken.
  8822. o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
  8823. - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
  8824. bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
  8825. o Major bugfixes (guard selection, backport from 0.2.7.6):
  8826. - Actually look at the Guard flag when selecting a new directory
  8827. guard. When we implemented the directory guard design, we
  8828. accidentally started treating all relays as if they have the Guard
  8829. flag during guard selection, leading to weaker anonymity and worse
  8830. performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
  8831. by Mohsen Imani.
  8832. o Major bugfixes (key management, backport from 0.2.8.3-alpha):
  8833. - If OpenSSL fails to generate an RSA key, do not retain a dangling
  8834. pointer to the previous (uninitialized) key value. The impact here
  8835. should be limited to a difficult-to-trigger crash, if OpenSSL is
  8836. running an engine that makes key generation failures possible, or
  8837. if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
  8838. 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
  8839. Baishakhi Ray.
  8840. o Major bugfixes (parsing, backported from 0.3.0.4-rc):
  8841. - Fix an integer underflow bug when comparing malformed Tor
  8842. versions. This bug could crash Tor when built with
  8843. --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
  8844. 0.2.9.8, which were built with -ftrapv by default. In other cases
  8845. it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
  8846. on 0.0.8pre1. Found by OSS-Fuzz.
  8847. o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
  8848. - Make memwipe() do nothing when passed a NULL pointer or buffer of
  8849. zero size. Check size argument to memwipe() for underflow. Fixes
  8850. bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
  8851. patch by "teor".
  8852. o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
  8853. - Make Tor survive errors involving connections without a
  8854. corresponding event object. Previously we'd fail with an
  8855. assertion; now we produce a log message. Related to bug 16248.
  8856. o Minor features (geoip):
  8857. - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
  8858. Country database.
  8859. o Minor bugfixes (compilation, backport from 0.2.7.6):
  8860. - Fix a compilation warning with Clang 3.6: Do not check the
  8861. presence of an address which can never be NULL. Fixes bug 17781.
  8862. Changes in version 0.2.5.13 - 2017-03-03
  8863. Tor 0.2.5.13 backports a number of security fixes from later Tor
  8864. releases. Anybody running Tor 0.2.5.13 or earlier should upgrade to
  8865. this release, if for some reason they cannot upgrade to a later
  8866. release series.
  8867. Note that support for Tor 0.2.5.x is ending next year: we will not issue
  8868. any fixes for the Tor 0.2.5.x series after 1 May 2018. If you need
  8869. a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
  8870. o Directory authority changes (backport from 0.2.8.5-rc):
  8871. - Urras is no longer a directory authority. Closes ticket 19271.
  8872. o Directory authority changes (backport from 0.2.9.2-alpha):
  8873. - The "Tonga" bridge authority has been retired; the new bridge
  8874. authority is "Bifroest". Closes tickets 19728 and 19690.
  8875. o Directory authority key updates (backport from 0.2.8.1-alpha):
  8876. - Update the V3 identity key for the dannenberg directory authority:
  8877. it was changed on 18 November 2015. Closes task 17906. Patch
  8878. by "teor".
  8879. o Major features (security fixes, backport from 0.2.9.4-alpha):
  8880. - Prevent a class of security bugs caused by treating the contents
  8881. of a buffer chunk as if they were a NUL-terminated string. At
  8882. least one such bug seems to be present in all currently used
  8883. versions of Tor, and would allow an attacker to remotely crash
  8884. most Tor instances, especially those compiled with extra compiler
  8885. hardening. With this defense in place, such bugs can't crash Tor,
  8886. though we should still fix them as they occur. Closes ticket
  8887. 20384 (TROVE-2016-10-001).
  8888. o Major bugfixes (parsing, security, backport from 0.2.9.8):
  8889. - Fix a bug in parsing that could cause clients to read a single
  8890. byte past the end of an allocated region. This bug could be used
  8891. to cause hardened clients (built with --enable-expensive-hardening)
  8892. to crash if they tried to visit a hostile hidden service. Non-
  8893. hardened clients are only affected depending on the details of
  8894. their platform's memory allocator. Fixes bug 21018; bugfix on
  8895. 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
  8896. 2016-12-002 and as CVE-2016-1254.
  8897. o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
  8898. - Stop a crash that could occur when a client running with DNSPort
  8899. received a query with multiple address types, and the first
  8900. address type was not supported. Found and fixed by Scott Dial.
  8901. Fixes bug 18710; bugfix on 0.2.5.4-alpha.
  8902. o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
  8903. - Fix an error that could cause us to read 4 bytes before the
  8904. beginning of an openssl string. This bug could be used to cause
  8905. Tor to crash on systems with unusual malloc implementations, or
  8906. systems with unusual hardening installed. Fixes bug 17404; bugfix
  8907. on 0.2.3.6-alpha.
  8908. o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
  8909. - Avoid a difficult-to-trigger heap corruption attack when extending
  8910. a smartlist to contain over 16GB of pointers. Fixes bug 18162;
  8911. bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
  8912. Reported by Guido Vranken.
  8913. o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
  8914. - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
  8915. bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
  8916. o Major bugfixes (guard selection, backport from 0.2.7.6):
  8917. - Actually look at the Guard flag when selecting a new directory
  8918. guard. When we implemented the directory guard design, we
  8919. accidentally started treating all relays as if they have the Guard
  8920. flag during guard selection, leading to weaker anonymity and worse
  8921. performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
  8922. by Mohsen Imani.
  8923. o Major bugfixes (key management, backport from 0.2.8.3-alpha):
  8924. - If OpenSSL fails to generate an RSA key, do not retain a dangling
  8925. pointer to the previous (uninitialized) key value. The impact here
  8926. should be limited to a difficult-to-trigger crash, if OpenSSL is
  8927. running an engine that makes key generation failures possible, or
  8928. if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
  8929. 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
  8930. Baishakhi Ray.
  8931. o Major bugfixes (parsing, backported from 0.3.0.4-rc):
  8932. - Fix an integer underflow bug when comparing malformed Tor
  8933. versions. This bug could crash Tor when built with
  8934. --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
  8935. 0.2.9.8, which were built with -ftrapv by default. In other cases
  8936. it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
  8937. on 0.0.8pre1. Found by OSS-Fuzz.
  8938. o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
  8939. - Make memwipe() do nothing when passed a NULL pointer or buffer of
  8940. zero size. Check size argument to memwipe() for underflow. Fixes
  8941. bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
  8942. patch by "teor".
  8943. o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
  8944. - Make Tor survive errors involving connections without a
  8945. corresponding event object. Previously we'd fail with an
  8946. assertion; now we produce a log message. Related to bug 16248.
  8947. o Minor features (geoip):
  8948. - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
  8949. Country database.
  8950. o Minor bugfixes (compilation, backport from 0.2.7.6):
  8951. - Fix a compilation warning with Clang 3.6: Do not check the
  8952. presence of an address which can never be NULL. Fixes bug 17781.
  8953. o Minor bugfixes (crypto error-handling, backport from 0.2.7.2-alpha):
  8954. - Check for failures from crypto_early_init, and refuse to continue.
  8955. A previous typo meant that we could keep going with an
  8956. uninitialized crypto library, and would have OpenSSL initialize
  8957. its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
  8958. when implementing ticket 4900. Patch by "teor".
  8959. o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
  8960. - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
  8961. a client authorized hidden service. Fixes bug 15823; bugfix
  8962. on 0.2.1.6-alpha.
  8963. Changes in version 0.2.4.28 - 2017-03-03
  8964. Tor 0.2.4.28 backports a number of security fixes from later Tor
  8965. releases. Anybody running Tor 0.2.4.27 or earlier should upgrade to
  8966. this release, if for some reason they cannot upgrade to a later
  8967. release series.
  8968. Note that support for Tor 0.2.4.x is ending soon: we will not issue
  8969. any fixes for the Tor 0.2.4.x series after 1 August 2017. If you need
  8970. a Tor release series with long-term support, we recommend Tor 0.2.9.x.
  8971. o Directory authority changes (backport from 0.2.8.5-rc):
  8972. - Urras is no longer a directory authority. Closes ticket 19271.
  8973. o Directory authority changes (backport from 0.2.9.2-alpha):
  8974. - The "Tonga" bridge authority has been retired; the new bridge
  8975. authority is "Bifroest". Closes tickets 19728 and 19690.
  8976. o Directory authority key updates (backport from 0.2.8.1-alpha):
  8977. - Update the V3 identity key for the dannenberg directory authority:
  8978. it was changed on 18 November 2015. Closes task 17906. Patch
  8979. by "teor".
  8980. o Major features (security fixes, backport from 0.2.9.4-alpha):
  8981. - Prevent a class of security bugs caused by treating the contents
  8982. of a buffer chunk as if they were a NUL-terminated string. At
  8983. least one such bug seems to be present in all currently used
  8984. versions of Tor, and would allow an attacker to remotely crash
  8985. most Tor instances, especially those compiled with extra compiler
  8986. hardening. With this defense in place, such bugs can't crash Tor,
  8987. though we should still fix them as they occur. Closes ticket
  8988. 20384 (TROVE-2016-10-001).
  8989. o Major bugfixes (parsing, security, backport from 0.2.9.8):
  8990. - Fix a bug in parsing that could cause clients to read a single
  8991. byte past the end of an allocated region. This bug could be used
  8992. to cause hardened clients (built with --enable-expensive-hardening)
  8993. to crash if they tried to visit a hostile hidden service. Non-
  8994. hardened clients are only affected depending on the details of
  8995. their platform's memory allocator. Fixes bug 21018; bugfix on
  8996. 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
  8997. 2016-12-002 and as CVE-2016-1254.
  8998. o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
  8999. - Fix an error that could cause us to read 4 bytes before the
  9000. beginning of an openssl string. This bug could be used to cause
  9001. Tor to crash on systems with unusual malloc implementations, or
  9002. systems with unusual hardening installed. Fixes bug 17404; bugfix
  9003. on 0.2.3.6-alpha.
  9004. o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
  9005. - Avoid a difficult-to-trigger heap corruption attack when extending
  9006. a smartlist to contain over 16GB of pointers. Fixes bug 18162;
  9007. bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
  9008. Reported by Guido Vranken.
  9009. o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
  9010. - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
  9011. bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
  9012. o Major bugfixes (guard selection, backport from 0.2.7.6):
  9013. - Actually look at the Guard flag when selecting a new directory
  9014. guard. When we implemented the directory guard design, we
  9015. accidentally started treating all relays as if they have the Guard
  9016. flag during guard selection, leading to weaker anonymity and worse
  9017. performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
  9018. by Mohsen Imani.
  9019. o Major bugfixes (key management, backport from 0.2.8.3-alpha):
  9020. - If OpenSSL fails to generate an RSA key, do not retain a dangling
  9021. pointer to the previous (uninitialized) key value. The impact here
  9022. should be limited to a difficult-to-trigger crash, if OpenSSL is
  9023. running an engine that makes key generation failures possible, or
  9024. if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
  9025. 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
  9026. Baishakhi Ray.
  9027. o Major bugfixes (parsing, backported from 0.3.0.4-rc):
  9028. - Fix an integer underflow bug when comparing malformed Tor
  9029. versions. This bug could crash Tor when built with
  9030. --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
  9031. 0.2.9.8, which were built with -ftrapv by default. In other cases
  9032. it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
  9033. on 0.0.8pre1. Found by OSS-Fuzz.
  9034. o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
  9035. - Make memwipe() do nothing when passed a NULL pointer or buffer of
  9036. zero size. Check size argument to memwipe() for underflow. Fixes
  9037. bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
  9038. patch by "teor".
  9039. o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
  9040. - Make Tor survive errors involving connections without a
  9041. corresponding event object. Previously we'd fail with an
  9042. assertion; now we produce a log message. Related to bug 16248.
  9043. o Minor features (DoS-resistance, backport from 0.2.7.1-alpha):
  9044. - Make it harder for attackers to overload hidden services with
  9045. introductions, by blocking multiple introduction requests on the
  9046. same circuit. Resolves ticket 15515.
  9047. o Minor features (geoip):
  9048. - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
  9049. Country database.
  9050. o Minor bugfixes (compilation, backport from 0.2.7.6):
  9051. - Fix a compilation warning with Clang 3.6: Do not check the
  9052. presence of an address which can never be NULL. Fixes bug 17781.
  9053. o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
  9054. - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
  9055. a client authorized hidden service. Fixes bug 15823; bugfix
  9056. on 0.2.1.6-alpha.
  9057. Changes in version 0.3.0.4-rc - 2017-03-01
  9058. Tor 0.3.0.4-rc fixes some remaining bugs, large and small, in the
  9059. 0.3.0 release series, and introduces a few reliability features to
  9060. keep them from coming back.
  9061. This is the first release candidate in the Tor 0.3.0 series. If we
  9062. find no new bugs or regressions here, the first stable 0.3.0 release
  9063. will be nearly identical to it.
  9064. o Major bugfixes (bridges):
  9065. - When the same bridge is configured multiple times with the same
  9066. identity, but at different address:port combinations, treat those
  9067. bridge instances as separate guards. This fix restores the ability
  9068. of clients to configure the same bridge with multiple pluggable
  9069. transports. Fixes bug 21027; bugfix on 0.3.0.1-alpha.
  9070. o Major bugfixes (hidden service directory v3):
  9071. - Stop crashing on a failed v3 hidden service descriptor lookup
  9072. failure. Fixes bug 21471; bugfixes on 0.3.0.1-alpha.
  9073. o Major bugfixes (parsing):
  9074. - When parsing a malformed content-length field from an HTTP
  9075. message, do not read off the end of the buffer. This bug was a
  9076. potential remote denial-of-service attack against Tor clients and
  9077. relays. A workaround was released in October 2016, to prevent this
  9078. bug from crashing Tor. This is a fix for the underlying issue,
  9079. which should no longer matter (if you applied the earlier patch).
  9080. Fixes bug 20894; bugfix on 0.2.0.16-alpha. Bug found by fuzzing
  9081. using AFL (http://lcamtuf.coredump.cx/afl/).
  9082. - Fix an integer underflow bug when comparing malformed Tor
  9083. versions. This bug could crash Tor when built with
  9084. --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
  9085. 0.2.9.8, which were built with -ftrapv by default. In other cases
  9086. it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
  9087. on 0.0.8pre1. Found by OSS-Fuzz.
  9088. o Minor feature (protocol versioning):
  9089. - Add new protocol version for proposal 224. HSIntro now advertises
  9090. version "3-4" and HSDir version "1-2". Fixes ticket 20656.
  9091. o Minor features (directory authorities):
  9092. - Directory authorities now reject descriptors that claim to be
  9093. malformed versions of Tor. Helps prevent exploitation of
  9094. bug 21278.
  9095. - Reject version numbers with components that exceed INT32_MAX.
  9096. Otherwise 32-bit and 64-bit platforms would behave inconsistently.
  9097. Fixes bug 21450; bugfix on 0.0.8pre1.
  9098. - Directory authorities now reject relays running versions
  9099. 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
  9100. suffer from bug 20499 and don't keep their consensus cache
  9101. up-to-date. Resolves ticket 20509.
  9102. o Minor features (geoip):
  9103. - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
  9104. Country database.
  9105. o Minor features (reliability, crash):
  9106. - Try better to detect problems in buffers where they might grow (or
  9107. think they have grown) over 2 GB in size. Diagnostic for
  9108. bug 21369.
  9109. o Minor features (testing):
  9110. - During 'make test-network-all', if tor logs any warnings, ask
  9111. chutney to output them. Requires a recent version of chutney with
  9112. the 21572 patch. Implements 21570.
  9113. o Minor bugfixes (certificate expiration time):
  9114. - Avoid using link certificates that don't become valid till some
  9115. time in the future. Fixes bug 21420; bugfix on 0.2.4.11-alpha
  9116. o Minor bugfixes (code correctness):
  9117. - Repair a couple of (unreachable or harmless) cases of the risky
  9118. comparison-by-subtraction pattern that caused bug 21278.
  9119. - Remove a redundant check for the UseEntryGuards option from the
  9120. options_transition_affects_guards() function. Fixes bug 21492;
  9121. bugfix on 0.3.0.1-alpha.
  9122. o Minor bugfixes (directory mirrors):
  9123. - Allow relays to use directory mirrors without a DirPort: these
  9124. relays need to be contacted over their ORPorts using a begindir
  9125. connection. Fixes one case of bug 20711; bugfix on 0.2.8.2-alpha.
  9126. - Clarify the message logged when a remote relay is unexpectedly
  9127. missing an ORPort or DirPort: users were confusing this with a
  9128. local port. Fixes another case of bug 20711; bugfix
  9129. on 0.2.8.2-alpha.
  9130. o Minor bugfixes (guards):
  9131. - Don't warn about a missing guard state on timeout-measurement
  9132. circuits: they aren't supposed to be using guards. Fixes an
  9133. instance of bug 21007; bugfix on 0.3.0.1-alpha.
  9134. - Silence a BUG() warning when attempting to use a guard whose
  9135. descriptor we don't know, and make this scenario less likely to
  9136. happen. Fixes bug 21415; bugfix on 0.3.0.1-alpha.
  9137. o Minor bugfixes (hidden service):
  9138. - Pass correct buffer length when encoding legacy ESTABLISH_INTRO
  9139. cells. Previously, we were using sizeof() on a pointer, instead of
  9140. the real destination buffer. Fortunately, that value was only used
  9141. to double-check that there was enough room--which was already
  9142. enforced elsewhere. Fixes bug 21553; bugfix on 0.3.0.1-alpha.
  9143. o Minor bugfixes (testing):
  9144. - Fix Raspbian build issues related to missing socket errno in
  9145. test_util.c. Fixes bug 21116; bugfix on 0.2.8.2. Patch
  9146. by "hein".
  9147. - Rename "make fuzz" to "make test-fuzz-corpora", since it doesn't
  9148. actually fuzz anything. Fixes bug 21447; bugfix on 0.3.0.3-alpha.
  9149. - Use bash in src/test/test-network.sh. This ensures we reliably
  9150. call chutney's newer tools/test-network.sh when available. Fixes
  9151. bug 21562; bugfix on 0.2.9.1-alpha.
  9152. o Documentation:
  9153. - Small fixes to the fuzzing documentation. Closes ticket 21472.
  9154. Changes in version 0.2.9.10 - 2017-03-01
  9155. Tor 0.2.9.10 backports a security fix from later Tor release. It also
  9156. includes fixes for some major issues affecting directory authorities,
  9157. LibreSSL compatibility, and IPv6 correctness.
  9158. The Tor 0.2.9.x release series is now marked as a long-term-support
  9159. series. We intend to backport security fixes to 0.2.9.x until at
  9160. least January of 2020.
  9161. o Major bugfixes (directory authority, 0.3.0.3-alpha):
  9162. - During voting, when marking a relay as a probable sybil, do not
  9163. clear its BadExit flag: sybils can still be bad in other ways
  9164. too. (We still clear the other flags.) Fixes bug 21108; bugfix
  9165. on 0.2.0.13-alpha.
  9166. o Major bugfixes (IPv6 Exits, backport from 0.3.0.3-alpha):
  9167. - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
  9168. any IPv6 addresses. Instead, only reject a port over IPv6 if the
  9169. exit policy rejects that port on more than an IPv6 /16 of
  9170. addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
  9171. which rejected a relay's own IPv6 address by default. Fixes bug
  9172. 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
  9173. o Major bugfixes (parsing, also in 0.3.0.4-rc):
  9174. - Fix an integer underflow bug when comparing malformed Tor
  9175. versions. This bug could crash Tor when built with
  9176. --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
  9177. 0.2.9.8, which were built with -ftrapv by default. In other cases
  9178. it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
  9179. on 0.0.8pre1. Found by OSS-Fuzz.
  9180. o Minor features (directory authorities, also in 0.3.0.4-rc):
  9181. - Directory authorities now reject descriptors that claim to be
  9182. malformed versions of Tor. Helps prevent exploitation of
  9183. bug 21278.
  9184. - Reject version numbers with components that exceed INT32_MAX.
  9185. Otherwise 32-bit and 64-bit platforms would behave inconsistently.
  9186. Fixes bug 21450; bugfix on 0.0.8pre1.
  9187. o Minor features (geoip):
  9188. - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
  9189. Country database.
  9190. o Minor features (portability, compilation, backport from 0.3.0.3-alpha):
  9191. - Autoconf now checks to determine if OpenSSL structures are opaque,
  9192. instead of explicitly checking for OpenSSL version numbers. Part
  9193. of ticket 21359.
  9194. - Support building with recent LibreSSL code that uses opaque
  9195. structures. Closes ticket 21359.
  9196. o Minor bugfixes (code correctness, also in 0.3.0.4-rc):
  9197. - Repair a couple of (unreachable or harmless) cases of the risky
  9198. comparison-by-subtraction pattern that caused bug 21278.
  9199. o Minor bugfixes (tor-resolve, backport from 0.3.0.3-alpha):
  9200. - The tor-resolve command line tool now rejects hostnames over 255
  9201. characters in length. Previously, it would silently truncate them,
  9202. which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
  9203. Patch by "junglefowl".
  9204. Changes in version 0.3.0.3-alpha - 2017-02-03
  9205. Tor 0.3.0.3-alpha fixes a few significant bugs introduced over the
  9206. 0.3.0.x development series, including some that could cause
  9207. authorities to behave badly. There is also a fix for a longstanding
  9208. bug that could prevent IPv6 exits from working. Tor 0.3.0.3-alpha also
  9209. includes some smaller features and bugfixes.
  9210. The Tor 0.3.0.x release series is now in patch-freeze: no additional
  9211. features will be considered for inclusion in 0.3.0.x. We suspect that
  9212. some bugs will probably remain, however, and we encourage people to
  9213. test this release.
  9214. o Major bugfixes (directory authority):
  9215. - During voting, when marking a relay as a probable sybil, do not
  9216. clear its BadExit flag: sybils can still be bad in other ways
  9217. too. (We still clear the other flags.) Fixes bug 21108; bugfix
  9218. on 0.2.0.13-alpha.
  9219. - When deciding whether we have just found a router to be reachable,
  9220. do not penalize it for not having performed an Ed25519 link
  9221. handshake if it does not claim to support an Ed25519 handshake.
  9222. Previously, we would treat such relays as non-running. Fixes bug
  9223. 21107; bugfix on 0.3.0.1-alpha.
  9224. o Major bugfixes (entry guards):
  9225. - Stop trying to build circuits through entry guards for which we
  9226. have no descriptor. Also, stop crashing in the case that we *do*
  9227. accidentally try to build a circuit in such a state. Fixes bug
  9228. 21242; bugfix on 0.3.0.1-alpha.
  9229. o Major bugfixes (IPv6 Exits):
  9230. - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
  9231. any IPv6 addresses. Instead, only reject a port over IPv6 if the
  9232. exit policy rejects that port on more than an IPv6 /16 of
  9233. addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
  9234. which rejected a relay's own IPv6 address by default. Fixes bug
  9235. 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
  9236. o Minor feature (client):
  9237. - Enable IPv6 traffic on the SocksPort by default. To disable this,
  9238. a user will have to specify "NoIPv6Traffic". Closes ticket 21269.
  9239. o Minor feature (fallback scripts):
  9240. - Add a check_existing mode to updateFallbackDirs.py, which checks
  9241. if fallbacks in the hard-coded list are working. Closes ticket
  9242. 20174. Patch by haxxpop.
  9243. o Minor features (ciphersuite selection):
  9244. - Clients now advertise a list of ciphersuites closer to the ones
  9245. preferred by Firefox. Closes part of ticket 15426.
  9246. - Allow relays to accept a wider range of ciphersuites, including
  9247. chacha20-poly1305 and AES-CCM. Closes the other part of 15426.
  9248. o Minor features (controller, configuration):
  9249. - Each of the *Port options, such as SocksPort, ORPort, ControlPort,
  9250. and so on, now comes with a __*Port variant that will not be saved
  9251. to the torrc file by the controller's SAVECONF command. This
  9252. change allows TorBrowser to set up a single-use domain socket for
  9253. each time it launches Tor. Closes ticket 20956.
  9254. - The GETCONF command can now query options that may only be
  9255. meaningful in context-sensitive lists. This allows the controller
  9256. to query the mixed SocksPort/__SocksPort style options introduced
  9257. in feature 20956. Implements ticket 21300.
  9258. o Minor features (portability, compilation):
  9259. - Autoconf now checks to determine if OpenSSL structures are opaque,
  9260. instead of explicitly checking for OpenSSL version numbers. Part
  9261. of ticket 21359.
  9262. - Support building with recent LibreSSL code that uses opaque
  9263. structures. Closes ticket 21359.
  9264. o Minor features (relay):
  9265. - We now allow separation of exit and relay traffic to different
  9266. source IP addresses, using the OutboundBindAddressExit and
  9267. OutboundBindAddressOR options respectively. Closes ticket 17975.
  9268. Written by Michael Sonntag.
  9269. o Minor bugfix (logging):
  9270. - Don't recommend the use of Tor2web in non-anonymous mode.
  9271. Recommending Tor2web is a bad idea because the client loses all
  9272. anonymity. Tor2web should only be used in specific cases by users
  9273. who *know* and understand the issues. Fixes bug 21294; bugfix
  9274. on 0.2.9.3-alpha.
  9275. o Minor bugfixes (client):
  9276. - Always recover from failures in extend_info_from_node(), in an
  9277. attempt to prevent any recurrence of bug 21242. Fixes bug 21372;
  9278. bugfix on 0.2.3.1-alpha.
  9279. o Minor bugfixes (client, entry guards):
  9280. - Fix a bug warning (with backtrace) when we fail a channel that
  9281. circuits to fallback directories on it. Fixes bug 21128; bugfix
  9282. on 0.3.0.1-alpha.
  9283. - Fix a spurious bug warning (with backtrace) when removing an
  9284. expired entry guard. Fixes bug 21129; bugfix on 0.3.0.1-alpha.
  9285. - Fix a bug of the new guard algorithm where tor could stall for up
  9286. to 10 minutes before retrying a guard after a long period of no
  9287. network. Fixes bug 21052; bugfix on 0.3.0.1-alpha.
  9288. - Do not try to build circuits until we have descriptors for our
  9289. primary entry guards. Related to fix for bug 21242.
  9290. o Minor bugfixes (configure, autoconf):
  9291. - Rename the configure option --enable-expensive-hardening to
  9292. --enable-fragile-hardening. Expensive hardening makes the tor
  9293. daemon abort when some kinds of issues are detected. Thus, it
  9294. makes tor more at risk of remote crashes but safer against RCE or
  9295. heartbleed bug category. We now try to explain this issue in a
  9296. message from the configure script. Fixes bug 21290; bugfix
  9297. on 0.2.5.4-alpha.
  9298. o Minor bugfixes (controller):
  9299. - Restore the (deprecated) DROPGUARDS controller command. Fixes bug
  9300. 20824; bugfix on 0.3.0.1-alpha.
  9301. o Minor bugfixes (hidden service):
  9302. - Clean up the code for expiring intro points with no associated
  9303. circuits. It was causing, rarely, a service with some expiring
  9304. introduction points to not open enough additional introduction
  9305. points. Fixes part of bug 21302; bugfix on 0.2.7.2-alpha.
  9306. - Stop setting the torrc option HiddenServiceStatistics to "0" just
  9307. because we're not a bridge or relay. Instead, we preserve whatever
  9308. value the user set (or didn't set). Fixes bug 21150; bugfix
  9309. on 0.2.6.2-alpha.
  9310. - Resolve two possible underflows which could lead to creating and
  9311. closing a lot of introduction point circuits in a non-stop loop.
  9312. Fixes bug 21302; bugfix on 0.2.7.2-alpha.
  9313. o Minor bugfixes (portability):
  9314. - Use "OpenBSD" compiler macro instead of "OPENBSD" or "__OpenBSD__".
  9315. It is supported by OpenBSD itself, and also by most OpenBSD
  9316. variants (such as Bitrig). Fixes bug 20980; bugfix
  9317. on 0.1.2.1-alpha.
  9318. - When mapping a file of length greater than SIZE_MAX, do not
  9319. silently truncate its contents. This issue could occur on 32 bit
  9320. systems with large file support and files which are larger than 4
  9321. GB. Fixes bug 21134; bugfix on 0.3.0.1-alpha.
  9322. o Minor bugfixes (tor-resolve):
  9323. - The tor-resolve command line tool now rejects hostnames over 255
  9324. characters in length. Previously, it would silently truncate them,
  9325. which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
  9326. Patch by "junglefowl".
  9327. o Minor bugfixes (Windows services):
  9328. - Be sure to initialize the monotonic time subsystem before using
  9329. it, even when running as an NT service. Fixes bug 21356; bugfix
  9330. on 0.2.9.1-alpha.
  9331. Changes in version 0.3.0.2-alpha - 2017-01-23
  9332. Tor 0.3.0.2-alpha fixes a denial-of-service bug where an attacker could
  9333. cause relays and clients to crash, even if they were not built with
  9334. the --enable-expensive-hardening option. This bug affects all 0.2.9.x
  9335. versions, and also affects 0.3.0.1-alpha: all relays running an affected
  9336. version should upgrade.
  9337. Tor 0.3.0.2-alpha also improves how exit relays and clients handle DNS
  9338. time-to-live values, makes directory authorities enforce the 1-to-1
  9339. mapping of relay RSA identity keys to ED25519 identity keys, fixes a
  9340. client-side onion service reachability bug, does better at selecting
  9341. the set of fallback directories, and more.
  9342. o Major bugfixes (security, also in 0.2.9.9):
  9343. - Downgrade the "-ftrapv" option from "always on" to "only on when
  9344. --enable-expensive-hardening is provided." This hardening option, like
  9345. others, can turn survivable bugs into crashes--and having it on by
  9346. default made a (relatively harmless) integer overflow bug into a
  9347. denial-of-service bug. Fixes bug 21278 (TROVE-2017-001); bugfix on
  9348. 0.2.9.1-alpha.
  9349. o Major features (security):
  9350. - Change the algorithm used to decide DNS TTLs on client and server
  9351. side, to better resist DNS-based correlation attacks like the
  9352. DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
  9353. Feamster. Now relays only return one of two possible DNS TTL
  9354. values, and clients are willing to believe DNS TTL values up to 3
  9355. hours long. Closes ticket 19769.
  9356. o Major features (directory authority, security):
  9357. - The default for AuthDirPinKeys is now 1: directory authorities
  9358. will reject relays where the RSA identity key matches a previously
  9359. seen value, but the Ed25519 key has changed. Closes ticket 18319.
  9360. o Major bugfixes (client, guard, crash):
  9361. - In circuit_get_global_origin_list(), return the actual list of
  9362. origin circuits. The previous version of this code returned the
  9363. list of all the circuits, and could have caused strange bugs,
  9364. including possible crashes. Fixes bug 21118; bugfix
  9365. on 0.3.0.1-alpha.
  9366. o Major bugfixes (client, onion service, also in 0.2.9.9):
  9367. - Fix a client-side onion service reachability bug, where multiple
  9368. socks requests to an onion service (or a single slow request)
  9369. could cause us to mistakenly mark some of the service's
  9370. introduction points as failed, and we cache that failure so
  9371. eventually we run out and can't reach the service. Also resolves a
  9372. mysterious "Remote server sent bogus reason code 65021" log
  9373. warning. The bug was introduced in ticket 17218, where we tried to
  9374. remember the circuit end reason as a uint16_t, which mangled
  9375. negative values. Partially fixes bug 21056 and fixes bug 20307;
  9376. bugfix on 0.2.8.1-alpha.
  9377. o Major bugfixes (DNS):
  9378. - Fix a bug that prevented exit nodes from caching DNS records for
  9379. more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.
  9380. o Minor features (controller):
  9381. - Add "GETINFO sr/current" and "GETINFO sr/previous" keys, to expose
  9382. shared-random values to the controller. Closes ticket 19925.
  9383. o Minor features (entry guards):
  9384. - Add UseEntryGuards to TEST_OPTIONS_DEFAULT_VALUES in order to not
  9385. break regression tests.
  9386. - Require UseEntryGuards when UseBridges is set, in order to make
  9387. sure bridges aren't bypassed. Resolves ticket 20502.
  9388. o Minor features (fallback directories):
  9389. - Select 200 fallback directories for each release. Closes
  9390. ticket 20881.
  9391. - Allow 3 fallback relays per operator, which is safe now that we
  9392. are choosing 200 fallback relays. Closes ticket 20912.
  9393. - Exclude relays affected by bug 20499 from the fallback list.
  9394. Exclude relays from the fallback list if they are running versions
  9395. known to be affected by bug 20499, or if in our tests they deliver
  9396. a stale consensus (i.e. one that expired more than 24 hours ago).
  9397. Closes ticket 20539.
  9398. - Reduce the minimum fallback bandwidth to 1 MByte/s. Part of
  9399. ticket 18828.
  9400. - Require fallback directories to have the same address and port for
  9401. 7 days (now that we have enough relays with this stability).
  9402. Relays whose OnionOO stability timer is reset on restart by bug
  9403. 18050 should upgrade to Tor 0.2.8.7 or later, which has a fix for
  9404. this issue. Closes ticket 20880; maintains short-term fix
  9405. in 0.2.8.2-alpha.
  9406. - Require fallbacks to have flags for 90% of the time (weighted
  9407. decaying average), rather than 95%. This allows at least 73% of
  9408. clients to bootstrap in the first 5 seconds without contacting an
  9409. authority. Part of ticket 18828.
  9410. - Annotate updateFallbackDirs.py with the bandwidth and consensus
  9411. weight for each candidate fallback. Closes ticket 20878.
  9412. - Make it easier to change the output sort order of fallbacks.
  9413. Closes ticket 20822.
  9414. - Display the relay fingerprint when downloading consensuses from
  9415. fallbacks. Closes ticket 20908.
  9416. o Minor features (geoip, also in 0.2.9.9):
  9417. - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
  9418. Country database.
  9419. o Minor features (next-gen onion service directories):
  9420. - Remove the "EnableOnionServicesV3" consensus parameter that we
  9421. introduced in 0.3.0.1-alpha: relays are now always willing to act
  9422. as v3 onion service directories. Resolves ticket 19899.
  9423. o Minor features (linting):
  9424. - Enhance the changes file linter to warn on Tor versions that are
  9425. prefixed with "tor-". Closes ticket 21096.
  9426. o Minor features (logging):
  9427. - In several places, describe unset ed25519 keys as "<unset>",
  9428. rather than the scary "AAAAAAAA...AAA". Closes ticket 21037.
  9429. o Minor bugfix (control protocol):
  9430. - The reply to a "GETINFO config/names" request via the control
  9431. protocol now spells the type "Dependent" correctly. This is a
  9432. breaking change in the control protocol. (The field seems to be
  9433. ignored by the most common known controllers.) Fixes bug 18146;
  9434. bugfix on 0.1.1.4-alpha.
  9435. o Minor bugfixes (bug resilience):
  9436. - Fix an unreachable size_t overflow in base64_decode(). Fixes bug
  9437. 19222; bugfix on 0.2.0.9-alpha. Found by Guido Vranken; fixed by
  9438. Hans Jerry Illikainen.
  9439. o Minor bugfixes (build):
  9440. - Replace obsolete Autoconf macros with their modern equivalent and
  9441. prevent similar issues in the future. Fixes bug 20990; bugfix
  9442. on 0.1.0.1-rc.
  9443. o Minor bugfixes (client, guards):
  9444. - Fix bug where Tor would think that there are circuits waiting for
  9445. better guards even though those circuits have been freed. Fixes
  9446. bug 21142; bugfix on 0.3.0.1-alpha.
  9447. o Minor bugfixes (config):
  9448. - Don't assert on startup when trying to get the options list and
  9449. LearnCircuitBuildTimeout is set to 0: we are currently parsing the
  9450. options so of course they aren't ready yet. Fixes bug 21062;
  9451. bugfix on 0.2.9.3-alpha.
  9452. o Minor bugfixes (controller):
  9453. - Make the GETINFO interface for inquiring about entry guards
  9454. support the new guards backend. Fixes bug 20823; bugfix
  9455. on 0.3.0.1-alpha.
  9456. o Minor bugfixes (dead code):
  9457. - Remove a redundant check for PidFile changes at runtime in
  9458. options_transition_allowed(): this check is already performed
  9459. regardless of whether the sandbox is active. Fixes bug 21123;
  9460. bugfix on 0.2.5.4-alpha.
  9461. o Minor bugfixes (documentation):
  9462. - Update the tor manual page to document every option that can not
  9463. be changed while tor is running. Fixes bug 21122.
  9464. o Minor bugfixes (fallback directories):
  9465. - Stop failing when a relay has no uptime data in
  9466. updateFallbackDirs.py. Fixes bug 20945; bugfix on 0.2.8.1-alpha.
  9467. - Avoid checking fallback candidates' DirPorts if they are down in
  9468. OnionOO. When a relay operator has multiple relays, this
  9469. prioritizes relays that are up over relays that are down. Fixes
  9470. bug 20926; bugfix on 0.2.8.3-alpha.
  9471. - Stop failing when OUTPUT_COMMENTS is True in updateFallbackDirs.py.
  9472. Fixes bug 20877; bugfix on 0.2.8.3-alpha.
  9473. o Minor bugfixes (guards, bootstrapping):
  9474. - When connecting to a directory guard during bootstrap, do not mark
  9475. the guard as successful until we receive a good-looking directory
  9476. response from it. Fixes bug 20974; bugfix on 0.3.0.1-alpha.
  9477. o Minor bugfixes (onion services):
  9478. - Fix the config reload pruning of old vs new services so it
  9479. actually works when both ephemeral and non-ephemeral services are
  9480. configured. Fixes bug 21054; bugfix on 0.3.0.1-alpha.
  9481. - Allow the number of introduction points to be as low as 0, rather
  9482. than as low as 3. Fixes bug 21033; bugfix on 0.2.7.2-alpha.
  9483. o Minor bugfixes (IPv6):
  9484. - Make IPv6-using clients try harder to find an IPv6 directory
  9485. server. Fixes bug 20999; bugfix on 0.2.8.2-alpha.
  9486. - When IPv6 addresses have not been downloaded yet (microdesc
  9487. consensus documents don't list relay IPv6 addresses), use hard-
  9488. coded addresses for authorities, fallbacks, and configured
  9489. bridges. Now IPv6-only clients can use microdescriptors. Fixes bug
  9490. 20996; bugfix on b167e82 from 19608 in 0.2.8.5-alpha.
  9491. o Minor bugfixes (memory leaks):
  9492. - Fix a memory leak when configuring hidden services. Fixes bug
  9493. 20987; bugfix on 0.3.0.1-alpha.
  9494. o Minor bugfixes (portability, also in 0.2.9.9):
  9495. - Avoid crashing when Tor is built using headers that contain
  9496. CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
  9497. without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
  9498. on 0.2.9.1-alpha.
  9499. - Fix Libevent detection on platforms without Libevent 1 headers
  9500. installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.
  9501. o Minor bugfixes (relay):
  9502. - Honor DataDirectoryGroupReadable when tor is a relay. Previously,
  9503. initializing the keys would reset the DataDirectory to 0700
  9504. instead of 0750 even if DataDirectoryGroupReadable was set to 1.
  9505. Fixes bug 19953; bugfix on 0.0.2pre16. Patch by "redfish".
  9506. o Minor bugfixes (testing):
  9507. - Remove undefined behavior from the backtrace generator by removing
  9508. its signal handler. Fixes bug 21026; bugfix on 0.2.5.2-alpha.
  9509. o Minor bugfixes (unit tests):
  9510. - Allow the unit tests to pass even when DNS lookups of bogus
  9511. addresses do not fail as expected. Fixes bug 20862 and 20863;
  9512. bugfix on unit tests introduced in 0.2.8.1-alpha
  9513. through 0.2.9.4-alpha.
  9514. o Code simplification and refactoring:
  9515. - Refactor code to manipulate global_origin_circuit_list into
  9516. separate functions. Closes ticket 20921.
  9517. o Documentation (formatting):
  9518. - Clean up formatting of tor.1 man page and HTML doc, where <pre>
  9519. blocks were incorrectly appearing. Closes ticket 20885.
  9520. o Documentation (man page):
  9521. - Clarify many options in tor.1 and add some min/max values for
  9522. HiddenService options. Closes ticket 21058.
  9523. Changes in version 0.2.9.9 - 2017-01-23
  9524. Tor 0.2.9.9 fixes a denial-of-service bug where an attacker could
  9525. cause relays and clients to crash, even if they were not built with
  9526. the --enable-expensive-hardening option. This bug affects all 0.2.9.x
  9527. versions, and also affects 0.3.0.1-alpha: all relays running an affected
  9528. version should upgrade.
  9529. This release also resolves a client-side onion service reachability
  9530. bug, and resolves a pair of small portability issues.
  9531. o Major bugfixes (security):
  9532. - Downgrade the "-ftrapv" option from "always on" to "only on when
  9533. --enable-expensive-hardening is provided." This hardening option,
  9534. like others, can turn survivable bugs into crashes -- and having
  9535. it on by default made a (relatively harmless) integer overflow bug
  9536. into a denial-of-service bug. Fixes bug 21278 (TROVE-2017-001);
  9537. bugfix on 0.2.9.1-alpha.
  9538. o Major bugfixes (client, onion service):
  9539. - Fix a client-side onion service reachability bug, where multiple
  9540. socks requests to an onion service (or a single slow request)
  9541. could cause us to mistakenly mark some of the service's
  9542. introduction points as failed, and we cache that failure so
  9543. eventually we run out and can't reach the service. Also resolves a
  9544. mysterious "Remote server sent bogus reason code 65021" log
  9545. warning. The bug was introduced in ticket 17218, where we tried to
  9546. remember the circuit end reason as a uint16_t, which mangled
  9547. negative values. Partially fixes bug 21056 and fixes bug 20307;
  9548. bugfix on 0.2.8.1-alpha.
  9549. o Minor features (geoip):
  9550. - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
  9551. Country database.
  9552. o Minor bugfixes (portability):
  9553. - Avoid crashing when Tor is built using headers that contain
  9554. CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
  9555. without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
  9556. on 0.2.9.1-alpha.
  9557. - Fix Libevent detection on platforms without Libevent 1 headers
  9558. installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.
  9559. Changes in version 0.3.0.1-alpha - 2016-12-19
  9560. Tor 0.3.0.1-alpha is the first alpha release in the 0.3.0 development
  9561. series. It strengthens Tor's link and circuit handshakes by
  9562. identifying relays by their Ed25519 keys, improves the algorithm that
  9563. clients use to choose and maintain their list of guards, and includes
  9564. additional backend support for the next-generation hidden service
  9565. design. It also contains numerous other small features and
  9566. improvements to security, correctness, and performance.
  9567. Below are the changes since 0.2.9.8.
  9568. o Major features (guard selection algorithm):
  9569. - Tor's guard selection algorithm has been redesigned from the
  9570. ground up, to better support unreliable networks and restrictive
  9571. sets of entry nodes, and to better resist guard-capture attacks by
  9572. hostile local networks. Implements proposal 271; closes
  9573. ticket 19877.
  9574. o Major features (next-generation hidden services):
  9575. - Relays can now handle v3 ESTABLISH_INTRO cells as specified by
  9576. prop224 aka "Next Generation Hidden Services". Service and clients
  9577. don't use this functionality yet. Closes ticket 19043. Based on
  9578. initial code by Alec Heifetz.
  9579. - Relays now support the HSDir version 3 protocol, so that they can
  9580. can store and serve v3 descriptors. This is part of the next-
  9581. generation onion service work detailed in proposal 224. Closes
  9582. ticket 17238.
  9583. o Major features (protocol, ed25519 identity keys):
  9584. - Relays now use Ed25519 to prove their Ed25519 identities and to
  9585. one another, and to clients. This algorithm is faster and more
  9586. secure than the RSA-based handshake we've been doing until now.
  9587. Implements the second big part of proposal 220; Closes
  9588. ticket 15055.
  9589. - Clients now support including Ed25519 identity keys in the EXTEND2
  9590. cells they generate. By default, this is controlled by a consensus
  9591. parameter, currently disabled. You can turn this feature on for
  9592. testing by setting ExtendByEd25519ID in your configuration. This
  9593. might make your traffic appear different than the traffic
  9594. generated by other users, however. Implements part of ticket
  9595. 15056; part of proposal 220.
  9596. - Relays now understand requests to extend to other relays by their
  9597. Ed25519 identity keys. When an Ed25519 identity key is included in
  9598. an EXTEND2 cell, the relay will only extend the circuit if the
  9599. other relay can prove ownership of that identity. Implements part
  9600. of ticket 15056; part of proposal 220.
  9601. o Major bugfixes (scheduler):
  9602. - Actually compare circuit policies in ewma_cmp_cmux(). This bug
  9603. caused the channel scheduler to behave more or less randomly,
  9604. rather than preferring channels with higher-priority circuits.
  9605. Fixes bug 20459; bugfix on 0.2.6.2-alpha.
  9606. o Minor features (controller):
  9607. - When HSFETCH arguments cannot be parsed, say "Invalid argument"
  9608. rather than "unrecognized." Closes ticket 20389; patch from
  9609. Ivan Markin.
  9610. o Minor features (diagnostic, directory client):
  9611. - Warn when we find an unexpected inconsistency in directory
  9612. download status objects. Prevents some negative consequences of
  9613. bug 20593.
  9614. o Minor features (directory authority):
  9615. - Add a new authority-only AuthDirTestEd25519LinkKeys option (on by
  9616. default) to control whether authorities should try to probe relays
  9617. by their Ed25519 link keys. This option will go away in a few
  9618. releases--unless we encounter major trouble in our ed25519 link
  9619. protocol rollout, in which case it will serve as a safety option.
  9620. o Minor features (directory cache):
  9621. - Relays and bridges will now refuse to serve the consensus they
  9622. have if they know it is too old for a client to use. Closes
  9623. ticket 20511.
  9624. o Minor features (ed25519 link handshake):
  9625. - Advertise support for the ed25519 link handshake using the
  9626. subprotocol-versions mechanism, so that clients can tell which
  9627. relays can identity themselves by Ed25519 ID. Closes ticket 20552.
  9628. o Minor features (fingerprinting resistance, authentication):
  9629. - Extend the length of RSA keys used for TLS link authentication to
  9630. 2048 bits. (These weren't used for forward secrecy; for forward
  9631. secrecy, we used P256.) Closes ticket 13752.
  9632. o Minor features (infrastructure):
  9633. - Implement smartlist_add_strdup() function. Replaces the use of
  9634. smartlist_add(sl, tor_strdup(str)). Closes ticket 20048.
  9635. o Minor bugfixes (client):
  9636. - When clients that use bridges start up with a cached consensus on
  9637. disk, they were ignoring it and downloading a new one. Now they
  9638. use the cached one. Fixes bug 20269; bugfix on 0.2.3.12-alpha.
  9639. o Minor bugfixes (configuration):
  9640. - Accept non-space whitespace characters after the severity level in
  9641. the `Log` option. Fixes bug 19965; bugfix on 0.2.1.1-alpha.
  9642. - Support "TByte" and "TBytes" units in options given in bytes.
  9643. "TB", "terabyte(s)", "TBit(s)" and "terabit(s)" were already
  9644. supported. Fixes bug 20622; bugfix on 0.2.0.14-alpha.
  9645. o Minor bugfixes (consensus weight):
  9646. - Add new consensus method that initializes bw weights to 1 instead
  9647. of 0. This prevents a zero weight from making it all the way to
  9648. the end (happens in small testing networks) and causing an error.
  9649. Fixes bug 14881; bugfix on 0.2.2.17-alpha.
  9650. o Minor bugfixes (descriptors):
  9651. - Correctly recognise downloaded full descriptors as valid, even
  9652. when using microdescriptors as circuits. This affects clients with
  9653. FetchUselessDescriptors set, and may affect directory authorities.
  9654. Fixes bug 20839; bugfix on 0.2.3.2-alpha.
  9655. o Minor bugfixes (directory system):
  9656. - Download all consensus flavors, descriptors, and authority
  9657. certificates when FetchUselessDescriptors is set, regardless of
  9658. whether tor is a directory cache or not. Fixes bug 20667; bugfix
  9659. on all recent tor versions.
  9660. - Bridges and relays now use microdescriptors (like clients do)
  9661. rather than old-style router descriptors. Now bridges will blend
  9662. in with clients in terms of the circuits they build. Fixes bug
  9663. 6769; bugfix on 0.2.3.2-alpha.
  9664. o Minor bugfixes (ed25519 certificates):
  9665. - Correctly interpret ed25519 certificates that would expire some
  9666. time after 19 Jan 2038. Fixes bug 20027; bugfix on 0.2.7.2-alpha.
  9667. o Minor bugfixes (hidden services):
  9668. - Stop ignoring misconfigured hidden services. Instead, refuse to
  9669. start tor until the misconfigurations have been corrected. Fixes
  9670. bug 20559; bugfix on multiple commits in 0.2.7.1-alpha
  9671. and earlier.
  9672. o Minor bugfixes (memory leak at exit):
  9673. - Fix a small harmless memory leak at exit of the previously unused
  9674. RSA->Ed identity cross-certificate. Fixes bug 17779; bugfix
  9675. on 0.2.7.2-alpha.
  9676. o Minor bugfixes (util):
  9677. - When finishing writing a file to disk, if we were about to replace
  9678. the file with the temporary file created before and we fail to
  9679. replace it, remove the temporary file so it doesn't stay on disk.
  9680. Fixes bug 20646; bugfix on 0.2.0.7-alpha. Patch by fk.
  9681. o Minor bugfixes (Windows):
  9682. - Check for getpagesize before using it to mmap files. This fixes
  9683. compilation in some MinGW environments. Fixes bug 20530; bugfix on
  9684. 0.1.2.1-alpha. Reported by "ice".
  9685. o Code simplification and refactoring:
  9686. - Abolish all global guard context in entrynodes.c; replace with new
  9687. guard_selection_t structure as preparation for proposal 271.
  9688. Closes ticket 19858.
  9689. - Introduce rend_service_is_ephemeral() that tells if given onion
  9690. service is ephemeral. Replace unclear NULL-checkings for service
  9691. directory with this function. Closes ticket 20526.
  9692. - Extract magic numbers in circuituse.c into defined variables.
  9693. - Refactor circuit_is_available_for_use to remove unnecessary check.
  9694. - Refactor circuit_predict_and_launch_new for readability and
  9695. testability. Closes ticket 18873.
  9696. - Refactor large if statement in purpose_needs_anonymity to use
  9697. switch statement instead. Closes part of ticket 20077.
  9698. - Refactor the hashing API to return negative values for errors, as
  9699. is done as throughout the codebase. Closes ticket 20717.
  9700. - Remove data structures that were used to index or_connection
  9701. objects by their RSA identity digests. These structures are fully
  9702. redundant with the similar structures used in the
  9703. channel abstraction.
  9704. - Remove duplicate code in the channel_write_*cell() functions.
  9705. Closes ticket 13827; patch from Pingl.
  9706. - Remove redundant behavior of is_sensitive_dir_purpose, refactor to
  9707. use only purpose_needs_anonymity. Closes part of ticket 20077.
  9708. - The code to generate and parse EXTEND and EXTEND2 cells has been
  9709. replaced with code automatically generated by the
  9710. "trunnel" utility.
  9711. o Documentation:
  9712. - Include the "TBits" unit in Tor's man page. Fixes part of bug
  9713. 20622; bugfix on 0.2.5.1-alpha.
  9714. - Change '1' to 'weight_scale' in consensus bw weights calculation
  9715. comments, as that is reality. Closes ticket 20273. Patch
  9716. from pastly.
  9717. - Correct the value for AuthDirGuardBWGuarantee in the manpage, from
  9718. 250 KBytes to 2 MBytes. Fixes bug 20435; bugfix
  9719. on 0.2.5.6-alpha.
  9720. - Stop the man page from incorrectly stating that HiddenServiceDir
  9721. must already exist. Fixes 20486.
  9722. - Clarify that when ClientRejectInternalAddresses is enabled (which
  9723. is the default), multicast DNS hostnames for machines on the local
  9724. network (of the form *.local) are also rejected. Closes
  9725. ticket 17070.
  9726. o Removed features:
  9727. - The AuthDirMaxServersPerAuthAddr option no longer exists: The same
  9728. limit for relays running on a single IP applies to authority IP
  9729. addresses as well as to non-authority IP addresses. Closes
  9730. ticket 20960.
  9731. - The UseDirectoryGuards torrc option no longer exists: all users
  9732. that use entry guards will also use directory guards. Related to
  9733. proposal 271; implements part of ticket 20831.
  9734. o Testing:
  9735. - New unit tests for tor_htonll(). Closes ticket 19563. Patch
  9736. from "overcaffeinated".
  9737. - Perform the coding style checks when running the tests and fail
  9738. when coding style violations are found. Closes ticket 5500.
  9739. - Add tests for networkstatus_compute_bw_weights_v10.
  9740. - Add unit tests circuit_predict_and_launch_new.
  9741. - Extract dummy_origin_circuit_new so it can be used by other
  9742. test functions.
  9743. Changes in version 0.2.8.12 - 2016-12-19
  9744. Tor 0.2.8.12 backports a fix for a medium-severity issue (bug 21018
  9745. below) where Tor clients could crash when attempting to visit a
  9746. hostile hidden service. Clients are recommended to upgrade as packages
  9747. become available for their systems.
  9748. It also includes an updated list of fallback directories, backported
  9749. from 0.2.9.
  9750. Now that the Tor 0.2.9 series is stable, only major bugfixes will be
  9751. backported to 0.2.8 in the future.
  9752. o Major bugfixes (parsing, security, backported from 0.2.9.8):
  9753. - Fix a bug in parsing that could cause clients to read a single
  9754. byte past the end of an allocated region. This bug could be used
  9755. to cause hardened clients (built with --enable-expensive-hardening)
  9756. to crash if they tried to visit a hostile hidden service. Non-
  9757. hardened clients are only affected depending on the details of
  9758. their platform's memory allocator. Fixes bug 21018; bugfix on
  9759. 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
  9760. 2016-12-002 and as CVE-2016-1254.
  9761. o Minor features (fallback directory list, backported from 0.2.9.8):
  9762. - Replace the 81 remaining fallbacks of the 100 originally
  9763. introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
  9764. fallbacks (123 new, 54 existing, 27 removed) generated in December
  9765. 2016. Resolves ticket 20170.
  9766. o Minor features (geoip, backported from 0.2.9.7-rc):
  9767. - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
  9768. Country database.
  9769. Changes in version 0.2.9.8 - 2016-12-19
  9770. Tor 0.2.9.8 is the first stable release of the Tor 0.2.9 series.
  9771. The Tor 0.2.9 series makes mandatory a number of security features
  9772. that were formerly optional. It includes support for a new shared-
  9773. randomness protocol that will form the basis for next generation
  9774. hidden services, includes a single-hop hidden service mode for
  9775. optimizing .onion services that don't actually want to be hidden,
  9776. tries harder not to overload the directory authorities with excessive
  9777. downloads, and supports a better protocol versioning scheme for
  9778. improved compatibility with other implementations of the Tor protocol.
  9779. And of course, there are numerous other bugfixes and improvements.
  9780. This release also includes a fix for a medium-severity issue (bug
  9781. 21018 below) where Tor clients could crash when attempting to visit a
  9782. hostile hidden service. Clients are recommended to upgrade as packages
  9783. become available for their systems.
  9784. Below are the changes since 0.2.9.7-rc. For a list of all changes
  9785. since 0.2.8, see the ReleaseNotes file.
  9786. o Major bugfixes (parsing, security):
  9787. - Fix a bug in parsing that could cause clients to read a single
  9788. byte past the end of an allocated region. This bug could be used
  9789. to cause hardened clients (built with --enable-expensive-hardening)
  9790. to crash if they tried to visit a hostile hidden service. Non-
  9791. hardened clients are only affected depending on the details of
  9792. their platform's memory allocator. Fixes bug 21018; bugfix on
  9793. 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
  9794. 2016-12-002 and as CVE-2016-1254.
  9795. o Minor features (fallback directory list):
  9796. - Replace the 81 remaining fallbacks of the 100 originally
  9797. introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
  9798. fallbacks (123 new, 54 existing, 27 removed) generated in December
  9799. 2016. Resolves ticket 20170.
  9800. Changes in version 0.2.9.7-rc - 2016-12-12
  9801. Tor 0.2.9.7-rc fixes a few small bugs remaining in Tor 0.2.9.6-rc,
  9802. including a few that had prevented tests from passing on
  9803. some platforms.
  9804. o Minor features (geoip):
  9805. - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
  9806. Country database.
  9807. o Minor bugfix (build):
  9808. - The current Git revision when building from a local repository is
  9809. now detected correctly when using git worktrees. Fixes bug 20492;
  9810. bugfix on 0.2.3.9-alpha.
  9811. o Minor bugfixes (directory authority):
  9812. - When computing old Tor protocol line version in protover, we were
  9813. looking at 0.2.7.5 twice instead of a specific case for
  9814. 0.2.9.1-alpha. Fixes bug 20810; bugfix on 0.2.9.4-alpha.
  9815. o Minor bugfixes (download scheduling):
  9816. - Resolve a "bug" warning when considering a download schedule whose
  9817. delay had approached INT_MAX. Fixes 20875; bugfix on 0.2.9.5-alpha.
  9818. o Minor bugfixes (logging):
  9819. - Downgrade a harmless log message about the
  9820. pending_entry_connections list from "warn" to "info". Mitigates
  9821. bug 19926.
  9822. o Minor bugfixes (memory leak):
  9823. - Fix a small memory leak when receiving AF_UNIX connections on a
  9824. SocksPort. Fixes bug 20716; bugfix on 0.2.6.3-alpha.
  9825. - When moving a signed descriptor object from a source to an
  9826. existing destination, free the allocated memory inside that
  9827. destination object. Fixes bug 20715; bugfix on 0.2.8.3-alpha.
  9828. o Minor bugfixes (memory leak, use-after-free, linux seccomp2 sandbox):
  9829. - Fix a memory leak and use-after-free error when removing entries
  9830. from the sandbox's getaddrinfo() cache. Fixes bug 20710; bugfix on
  9831. 0.2.5.5-alpha. Patch from "cypherpunks".
  9832. o Minor bugfixes (portability):
  9833. - Use the correct spelling of MAC_OS_X_VERSION_10_12 on configure.ac
  9834. Fixes bug 20935; bugfix on 0.2.9.6-rc.
  9835. o Minor bugfixes (unit tests):
  9836. - Stop expecting NetBSD unit tests to report success for ipfw. Part
  9837. of a fix for bug 19960; bugfix on 0.2.9.5-alpha.
  9838. - Fix tolerances in unit tests for monotonic time comparisons
  9839. between nanoseconds and microseconds. Previously, we accepted a 10
  9840. us difference only, which is not realistic on every platform's
  9841. clock_gettime(). Fixes bug 19974; bugfix on 0.2.9.1-alpha.
  9842. - Remove a double-free in the single onion service unit test. Stop
  9843. ignoring a return value. Make future changes less error-prone.
  9844. Fixes bug 20864; bugfix on 0.2.9.6-rc.
  9845. Changes in version 0.2.8.11 - 2016-12-08
  9846. Tor 0.2.8.11 backports fixes for additional portability issues that
  9847. could prevent Tor from building correctly on OSX Sierra, or with
  9848. OpenSSL 1.1. Affected users should upgrade; others can safely stay
  9849. with 0.2.8.10.
  9850. o Minor bugfixes (portability):
  9851. - Avoid compilation errors when building on OSX Sierra. Sierra began
  9852. to support the getentropy() and clock_gettime() APIs, but created
  9853. a few problems in doing so. Tor 0.2.9 has a more thorough set of
  9854. workarounds; in 0.2.8, we are just using the /dev/urandom and mach
  9855. monotonic time interfaces. Fixes bug 20865. Bugfix
  9856. on 0.2.8.1-alpha.
  9857. o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
  9858. - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
  9859. architectures. Closes ticket 20588.
  9860. Changes in version 0.2.8.10 - 2016-12-02
  9861. Tor 0.2.8.10 backports a fix for a bug that would sometimes make clients
  9862. unusable after they left standby mode. It also backports fixes for
  9863. a few portability issues and a small but problematic memory leak.
  9864. o Major bugfixes (client reliability, backport from 0.2.9.5-alpha):
  9865. - When Tor leaves standby because of a new application request, open
  9866. circuits as needed to serve that request. Previously, we would
  9867. potentially wait a very long time. Fixes part of bug 19969; bugfix
  9868. on 0.2.8.1-alpha.
  9869. o Major bugfixes (client performance, backport from 0.2.9.5-alpha):
  9870. - Clients now respond to new application stream requests immediately
  9871. when they arrive, rather than waiting up to one second before
  9872. starting to handle them. Fixes part of bug 19969; bugfix
  9873. on 0.2.8.1-alpha.
  9874. o Minor bugfixes (portability, backport from 0.2.9.6-rc):
  9875. - Work around a bug in the OSX 10.12 SDK that would prevent us from
  9876. successfully targeting earlier versions of OSX. Resolves
  9877. ticket 20235.
  9878. o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
  9879. - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
  9880. 20551; bugfix on 0.2.1.1-alpha.
  9881. o Minor bugfixes (relay, backport from 0.2.9.5-alpha):
  9882. - Work around a memory leak in OpenSSL 1.1 when encoding public
  9883. keys. Fixes bug 20553; bugfix on 0.0.2pre8.
  9884. o Minor features (geoip):
  9885. - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
  9886. Country database.
  9887. Changes in version 0.2.9.6-rc - 2016-12-02
  9888. Tor 0.2.9.6-rc fixes a few remaining bugs found in the previous alpha
  9889. version. We hope that it will be ready to become stable soon, and we
  9890. encourage everyone to test this release. If no showstopper bugs are
  9891. found here, the next 0.2.9 release will be stable.
  9892. o Major bugfixes (relay, resolver, logging):
  9893. - For relays that don't know their own address, avoid attempting a
  9894. local hostname resolve for each descriptor we download. This
  9895. will cut down on the number of "Success: chose address 'x.x.x.x'"
  9896. log lines, and also avoid confusing clock jumps if the resolver
  9897. is slow. Fixes bugs 20423 and 20610; bugfix on 0.2.8.1-alpha.
  9898. o Minor bugfixes (client, fascistfirewall):
  9899. - Avoid spurious warnings when ReachableAddresses or FascistFirewall
  9900. is set. Fixes bug 20306; bugfix on 0.2.8.2-alpha.
  9901. o Minor bugfixes (hidden services):
  9902. - Stop ignoring the anonymity status of saved keys for hidden
  9903. services and single onion services when first starting tor.
  9904. Instead, refuse to start tor if any hidden service key has been
  9905. used in a different hidden service anonymity mode. Fixes bug
  9906. 20638; bugfix on 17178 in 0.2.9.3-alpha; reported by ahf.
  9907. o Minor bugfixes (portability):
  9908. - Work around a bug in the OSX 10.12 SDK that would prevent us from
  9909. successfully targeting earlier versions of OSX. Resolves
  9910. ticket 20235.
  9911. - Run correctly when built on Windows build environments that
  9912. require _vcsprintf(). Fixes bug 20560; bugfix on 0.2.2.11-alpha.
  9913. o Minor bugfixes (single onion services, Tor2web):
  9914. - Stop complaining about long-term one-hop circuits deliberately
  9915. created by single onion services and Tor2web. These log messages
  9916. are intended to diagnose issue 8387, which relates to circuits
  9917. hanging around forever for no reason. Fixes bug 20613; bugfix on
  9918. 0.2.9.1-alpha. Reported by "pastly".
  9919. o Minor bugfixes (unit tests):
  9920. - Stop spurious failures in the local interface address discovery
  9921. unit tests. Fixes bug 20634; bugfix on 0.2.8.1-alpha; patch by
  9922. Neel Chauhan.
  9923. o Documentation:
  9924. - Correct the minimum bandwidth value in torrc.sample, and queue a
  9925. corresponding change for torrc.minimal. Closes ticket 20085.
  9926. Changes in version 0.2.9.5-alpha - 2016-11-08
  9927. Tor 0.2.9.5-alpha fixes numerous bugs discovered in the previous alpha
  9928. version. We believe one or two probably remain, and we encourage
  9929. everyone to test this release.
  9930. o Major bugfixes (client performance):
  9931. - Clients now respond to new application stream requests immediately
  9932. when they arrive, rather than waiting up to one second before
  9933. starting to handle them. Fixes part of bug 19969; bugfix
  9934. on 0.2.8.1-alpha.
  9935. o Major bugfixes (client reliability):
  9936. - When Tor leaves standby because of a new application request, open
  9937. circuits as needed to serve that request. Previously, we would
  9938. potentially wait a very long time. Fixes part of bug 19969; bugfix
  9939. on 0.2.8.1-alpha.
  9940. o Major bugfixes (download scheduling):
  9941. - When using an exponential backoff schedule, do not give up on
  9942. downloading just because we have failed a bunch of times. Since
  9943. each delay is longer than the last, retrying indefinitely won't
  9944. hurt. Fixes bug 20536; bugfix on 0.2.9.1-alpha.
  9945. - If a consensus expires while we are waiting for certificates to
  9946. download, stop waiting for certificates.
  9947. - If we stop waiting for certificates less than a minute after we
  9948. started downloading them, do not consider the certificate download
  9949. failure a separate failure. Fixes bug 20533; bugfix
  9950. on 0.2.0.9-alpha.
  9951. - Remove the maximum delay on exponential-backoff scheduling. Since
  9952. we now allow an infinite number of failures (see ticket 20536), we
  9953. must now allow the time to grow longer on each failure. Fixes part
  9954. of bug 20534; bugfix on 0.2.9.1-alpha.
  9955. - Make our initial download delays closer to those from 0.2.8. Fixes
  9956. another part of bug 20534; bugfix on 0.2.9.1-alpha.
  9957. - When determining when to download a directory object, handle times
  9958. after 2038 if the operating system supports them. (Someday this
  9959. will be important!) Fixes bug 20587; bugfix on 0.2.8.1-alpha.
  9960. - When using exponential backoff in test networks, use a lower
  9961. exponent, so the delays do not vary as much. This helps test
  9962. networks bootstrap consistently. Fixes bug 20597; bugfix on 20499.
  9963. o Minor features (geoip):
  9964. - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
  9965. Country database.
  9966. o Minor bugfixes (client directory scheduling):
  9967. - Treat "relay too busy to answer request" as a failed request and a
  9968. reason to back off on our retry frequency. This is safe now that
  9969. exponential backoffs retry indefinitely, and avoids a bug where we
  9970. would reset our download schedule erroneously. Fixes bug 20593;
  9971. bugfix on 0.2.9.1-alpha.
  9972. o Minor bugfixes (client, logging):
  9973. - Remove a BUG warning in circuit_pick_extend_handshake(). Instead,
  9974. assume all nodes support EXTEND2. Use ntor whenever a key is
  9975. available. Fixes bug 20472; bugfix on 0.2.9.3-alpha.
  9976. - On DNSPort, stop logging a BUG warning on a failed hostname
  9977. lookup. Fixes bug 19869; bugfix on 0.2.9.1-alpha.
  9978. o Minor bugfixes (hidden services):
  9979. - When configuring hidden services, check every hidden service
  9980. directory's permissions. Previously, we only checked the last
  9981. hidden service. Fixes bug 20529; bugfix the work to fix 13942
  9982. in 0.2.6.2-alpha.
  9983. o Minor bugfixes (portability):
  9984. - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
  9985. architectures. Closes ticket 20588.
  9986. - Use ECDHE ciphers instead of ECDH in tortls tests. LibreSSL has
  9987. removed the ECDH ciphers which caused the tests to fail on
  9988. platforms which use it. Fixes bug 20460; bugfix on 0.2.8.1-alpha.
  9989. - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
  9990. 20551; bugfix on 0.2.1.1-alpha.
  9991. o Minor bugfixes (relay bootstrap):
  9992. - Ensure relays don't make multiple connections during bootstrap.
  9993. Fixes bug 20591; bugfix on 0.2.8.1-alpha.
  9994. o Minor bugfixes (relay):
  9995. - Work around a memory leak in OpenSSL 1.1 when encoding public
  9996. keys. Fixes bug 20553; bugfix on 0.0.2pre8.
  9997. - Avoid a small memory leak when informing worker threads about
  9998. rotated onion keys. Fixes bug 20401; bugfix on 0.2.6.3-alpha.
  9999. - Do not try to parallelize workers more than 16x without the user
  10000. explicitly configuring us to do so, even if we do detect more than
  10001. 16 CPU cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
  10002. o Minor bugfixes (single onion services):
  10003. - Start correctly when creating a single onion service in a
  10004. directory that did not previously exist. Fixes bug 20484; bugfix
  10005. on 0.2.9.3-alpha.
  10006. o Minor bugfixes (testing):
  10007. - Avoid a unit test failure on systems with over 16 detectable CPU
  10008. cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
  10009. o Documentation:
  10010. - Clarify that setting HiddenServiceNonAnonymousMode requires you to
  10011. also set "SOCKSPort 0". Fixes bug 20487; bugfix on 0.2.9.3-alpha.
  10012. - Module-level documentation for several more modules. Closes
  10013. tickets 19287 and 19290.
  10014. Changes in version 0.2.8.9 - 2016-10-17
  10015. Tor 0.2.8.9 backports a fix for a security hole in previous versions
  10016. of Tor that would allow a remote attacker to crash a Tor client,
  10017. hidden service, relay, or authority. All Tor users should upgrade to
  10018. this version, or to 0.2.9.4-alpha. Patches will be released for older
  10019. versions of Tor.
  10020. o Major features (security fixes, also in 0.2.9.4-alpha):
  10021. - Prevent a class of security bugs caused by treating the contents
  10022. of a buffer chunk as if they were a NUL-terminated string. At
  10023. least one such bug seems to be present in all currently used
  10024. versions of Tor, and would allow an attacker to remotely crash
  10025. most Tor instances, especially those compiled with extra compiler
  10026. hardening. With this defense in place, such bugs can't crash Tor,
  10027. though we should still fix them as they occur. Closes ticket
  10028. 20384 (TROVE-2016-10-001).
  10029. o Minor features (geoip):
  10030. - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
  10031. Country database.
  10032. Changes in version 0.2.9.4-alpha - 2016-10-17
  10033. Tor 0.2.9.4-alpha fixes a security hole in previous versions of Tor
  10034. that would allow a remote attacker to crash a Tor client, hidden
  10035. service, relay, or authority. All Tor users should upgrade to this
  10036. version, or to 0.2.8.9. Patches will be released for older versions
  10037. of Tor.
  10038. Tor 0.2.9.4-alpha also adds numerous small features and fix-ups to
  10039. previous versions of Tor, including the implementation of a feature to
  10040. future- proof the Tor ecosystem against protocol changes, some bug
  10041. fixes necessary for Tor Browser to use unix domain sockets correctly,
  10042. and several portability improvements. We anticipate that this will be
  10043. the last alpha in the Tor 0.2.9 series, and that the next release will
  10044. be a release candidate.
  10045. o Major features (security fixes):
  10046. - Prevent a class of security bugs caused by treating the contents
  10047. of a buffer chunk as if they were a NUL-terminated string. At
  10048. least one such bug seems to be present in all currently used
  10049. versions of Tor, and would allow an attacker to remotely crash
  10050. most Tor instances, especially those compiled with extra compiler
  10051. hardening. With this defense in place, such bugs can't crash Tor,
  10052. though we should still fix them as they occur. Closes ticket
  10053. 20384 (TROVE-2016-10-001).
  10054. o Major features (subprotocol versions):
  10055. - Tor directory authorities now vote on a set of recommended
  10056. subprotocol versions, and on a set of required subprotocol
  10057. versions. Clients and relays that lack support for a _required_
  10058. subprotocol version will not start; those that lack support for a
  10059. _recommended_ subprotocol version will warn the user to upgrade.
  10060. Closes ticket 19958; implements part of proposal 264.
  10061. - Tor now uses "subprotocol versions" to indicate compatibility.
  10062. Previously, versions of Tor looked at the declared Tor version of
  10063. a relay to tell whether they could use a given feature. Now, they
  10064. should be able to rely on its declared subprotocol versions. This
  10065. change allows compatible implementations of the Tor protocol(s) to
  10066. exist without pretending to be 100% bug-compatible with particular
  10067. releases of Tor itself. Closes ticket 19958; implements part of
  10068. proposal 264.
  10069. o Minor feature (fallback directories):
  10070. - Remove broken fallbacks from the hard-coded fallback directory
  10071. list. Closes ticket 20190; patch by teor.
  10072. o Minor features (client, directory):
  10073. - Since authorities now omit all routers that lack the Running and
  10074. Valid flags, we assume that any relay listed in the consensus must
  10075. have those flags. Closes ticket 20001; implements part of
  10076. proposal 272.
  10077. o Minor features (compilation, portability):
  10078. - Compile correctly on MacOS 10.12 (aka "Sierra"). Closes
  10079. ticket 20241.
  10080. o Minor features (development tools, etags):
  10081. - Teach the "make tags" Makefile target how to correctly find
  10082. "MOCK_IMPL" function definitions. Patch from nherring; closes
  10083. ticket 16869.
  10084. o Minor features (geoip):
  10085. - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
  10086. Country database.
  10087. o Minor features (unix domain sockets):
  10088. - When configuring a unix domain socket for a SocksPort,
  10089. ControlPort, or Hidden service, you can now wrap the address in
  10090. quotes, using C-style escapes inside the quotes. This allows unix
  10091. domain socket paths to contain spaces.
  10092. o Minor features (virtual addresses):
  10093. - Increase the maximum number of bits for the IPv6 virtual network
  10094. prefix from 16 to 104. In this way, the condition for address
  10095. allocation is less restrictive. Closes ticket 20151; feature
  10096. on 0.2.4.7-alpha.
  10097. o Minor bugfixes (address discovery):
  10098. - Stop reordering IP addresses returned by the OS. This makes it
  10099. more likely that Tor will guess the same relay IP address every
  10100. time. Fixes issue 20163; bugfix on 0.2.7.1-alpha, ticket 17027.
  10101. Reported by René Mayrhofer, patch by "cypherpunks".
  10102. o Minor bugfixes (client, unix domain sockets):
  10103. - Disable IsolateClientAddr when using AF_UNIX backed SocksPorts as
  10104. the client address is meaningless. Fixes bug 20261; bugfix
  10105. on 0.2.6.3-alpha.
  10106. o Minor bugfixes (compilation, OpenBSD):
  10107. - Detect Libevent2 functions correctly on systems that provide
  10108. libevent2, but where libevent1 is linked with -levent. Fixes bug
  10109. 19904; bugfix on 0.2.2.24-alpha. Patch from Rubiate.
  10110. o Minor bugfixes (configuration):
  10111. - When parsing quoted configuration values from the torrc file,
  10112. handle windows line endings correctly. Fixes bug 19167; bugfix on
  10113. 0.2.0.16-alpha. Patch from "Pingl".
  10114. o Minor bugfixes (getpass):
  10115. - Defensively fix a non-triggerable heap corruption at do_getpass()
  10116. to protect ourselves from mistakes in the future. Fixes bug
  10117. 19223; bugfix on 0.2.7.3-rc. Bug found by Guido Vranken, patch
  10118. by nherring.
  10119. o Minor bugfixes (hidden service):
  10120. - Allow hidden services to run on IPv6 addresses even when the
  10121. IPv6Exit option is not set. Fixes bug 18357; bugfix
  10122. on 0.2.4.7-alpha.
  10123. o Documentation:
  10124. - Add module-level internal documentation for 36 C files that
  10125. previously didn't have a high-level overview. Closes ticket #20385.
  10126. o Required libraries:
  10127. - When building with OpenSSL, Tor now requires version 1.0.1 or
  10128. later. OpenSSL 1.0.0 and earlier are no longer supported by the
  10129. OpenSSL team, and should not be used. Closes ticket 20303.
  10130. Changes in version 0.2.9.3-alpha - 2016-09-23
  10131. Tor 0.2.9.3-alpha adds improved support for entities that want to make
  10132. high-performance services available through the Tor .onion mechanism
  10133. without themselves receiving anonymity as they host those services. It
  10134. also tries harder to ensure that all steps on a circuit are using the
  10135. strongest crypto possible, strengthens some TLS properties, and
  10136. resolves several bugs -- including a pair of crash bugs from the 0.2.8
  10137. series. Anybody running an earlier version of 0.2.9.x should upgrade.
  10138. o Major bugfixes (crash, also in 0.2.8.8):
  10139. - Fix a complicated crash bug that could affect Tor clients
  10140. configured to use bridges when replacing a networkstatus consensus
  10141. in which one of their bridges was mentioned. OpenBSD users saw
  10142. more crashes here, but all platforms were potentially affected.
  10143. Fixes bug 20103; bugfix on 0.2.8.2-alpha.
  10144. o Major bugfixes (relay, OOM handler, also in 0.2.8.8):
  10145. - Fix a timing-dependent assertion failure that could occur when we
  10146. tried to flush from a circuit after having freed its cells because
  10147. of an out-of-memory condition. Fixes bug 20203; bugfix on
  10148. 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
  10149. this one.
  10150. o Major features (circuit building, security):
  10151. - Authorities, relays and clients now require ntor keys in all
  10152. descriptors, for all hops (except for rare hidden service protocol
  10153. cases), for all circuits, and for all other roles. Part of
  10154. ticket 19163.
  10155. - Tor authorities, relays, and clients only use ntor, except for
  10156. rare cases in the hidden service protocol. Part of ticket 19163.
  10157. o Major features (single-hop "hidden" services):
  10158. - Add experimental HiddenServiceSingleHopMode and
  10159. HiddenServiceNonAnonymousMode options. When both are set to 1,
  10160. every hidden service on a Tor instance becomes a non-anonymous
  10161. Single Onion Service. Single Onions make one-hop (direct)
  10162. connections to their introduction and rendezvous points. One-hop
  10163. circuits make Single Onion servers easily locatable, but clients
  10164. remain location-anonymous. This is compatible with the existing
  10165. hidden service implementation, and works on the current tor
  10166. network without any changes to older relays or clients. Implements
  10167. proposal 260, completes ticket 17178. Patch by teor and asn.
  10168. o Major features (resource management):
  10169. - Tor can now notice it is about to run out of sockets, and
  10170. preemptively close connections of lower priority. (This feature is
  10171. off by default for now, since the current prioritizing method is
  10172. yet not mature enough. You can enable it by setting
  10173. "DisableOOSCheck 0", but watch out: it might close some sockets
  10174. you would rather have it keep.) Closes ticket 18640.
  10175. o Major bugfixes (circuit building):
  10176. - Hidden service client-to-intro-point and service-to-rendezvous-
  10177. point circuits use the TAP key supplied by the protocol, to avoid
  10178. epistemic attacks. Fixes bug 19163; bugfix on 0.2.4.18-rc.
  10179. o Major bugfixes (compilation, OpenBSD):
  10180. - Fix a Libevent-detection bug in our autoconf script that would
  10181. prevent Tor from linking successfully on OpenBSD. Patch from
  10182. rubiate. Fixes bug 19902; bugfix on 0.2.9.1-alpha.
  10183. o Major bugfixes (hidden services):
  10184. - Clients now require hidden services to include the TAP keys for
  10185. their intro points in the hidden service descriptor. This prevents
  10186. an inadvertent upgrade to ntor, which a malicious hidden service
  10187. could use to distinguish clients by consensus version. Fixes bug
  10188. 20012; bugfix on 0.2.4.8-alpha. Patch by teor.
  10189. o Minor features (security, TLS):
  10190. - Servers no longer support clients that without AES ciphersuites.
  10191. (3DES is no longer considered an acceptable cipher.) We believe
  10192. that no such Tor clients currently exist, since Tor has required
  10193. OpenSSL 0.9.7 or later since 2009. Closes ticket 19998.
  10194. o Minor feature (fallback directories):
  10195. - Remove 8 fallbacks that are no longer suitable, leaving 81 of the
  10196. 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March
  10197. 2016. Closes ticket 20190; patch by teor.
  10198. o Minor features (geoip, also in 0.2.8.8):
  10199. - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
  10200. Country database.
  10201. o Minor feature (port flags):
  10202. - Add new flags to the *Port options to finer control over which
  10203. requests are allowed. The flags are NoDNSRequest, NoOnionTraffic,
  10204. and the synthetic flag OnionTrafficOnly, which is equivalent to
  10205. NoDNSRequest, NoIPv4Traffic, and NoIPv6Traffic. Closes enhancement
  10206. 18693; patch by "teor".
  10207. o Minor features (directory authority):
  10208. - After voting, if the authorities decide that a relay is not
  10209. "Valid", they no longer include it in the consensus at all. Closes
  10210. ticket 20002; implements part of proposal 272.
  10211. o Minor features (testing):
  10212. - Disable memory protections on OpenBSD when performing our unit
  10213. tests for memwipe(). The test deliberately invokes undefined
  10214. behavior, and the OpenBSD protections interfere with this. Patch
  10215. from "rubiate". Closes ticket 20066.
  10216. o Minor features (testing, ipv6):
  10217. - Add the single-onion and single-onion-ipv6 chutney targets to
  10218. "make test-network-all". This requires a recent chutney version
  10219. with the single onion network flavours (git c72a652 or later).
  10220. Closes ticket 20072; patch by teor.
  10221. - Add the hs-ipv6 chutney target to make test-network-all's IPv6
  10222. tests. Remove bridges+hs, as it's somewhat redundant. This
  10223. requires a recent chutney version that supports IPv6 clients,
  10224. relays, and authorities. Closes ticket 20069; patch by teor.
  10225. o Minor features (Tor2web):
  10226. - Make Tor2web clients respect ReachableAddresses. This feature was
  10227. inadvertently enabled in 0.2.8.6, then removed by bugfix 19973 on
  10228. 0.2.8.7. Implements feature 20034. Patch by teor.
  10229. o Minor features (unit tests):
  10230. - We've done significant work to make the unit tests run faster.
  10231. - Our link-handshake unit tests now check that when invalid
  10232. handshakes fail, they fail with the error messages we expected.
  10233. - Our unit testing code that captures log messages no longer
  10234. prevents them from being written out if the user asked for them
  10235. (by passing --debug or --info or or --notice --warn to the "test"
  10236. binary). This change prevents us from missing unexpected log
  10237. messages simply because we were looking for others. Related to
  10238. ticket 19999.
  10239. - The unit tests now log all warning messages with the "BUG" flag.
  10240. Previously, they only logged errors by default. This change will
  10241. help us make our testing code more correct, and make sure that we
  10242. only hit this code when we mean to. In the meantime, however,
  10243. there will be more warnings in the unit test logs than before.
  10244. This is preparatory work for ticket 19999.
  10245. - The unit tests now treat any failure of a "tor_assert_nonfatal()"
  10246. assertion as a test failure.
  10247. o Minor bug fixes (circuits):
  10248. - Use the CircuitBuildTimeout option whenever
  10249. LearnCircuitBuildTimeout is disabled. Previously, we would respect
  10250. the option when a user disabled it, but not when it was disabled
  10251. because some other option was set. Fixes bug 20073; bugfix on
  10252. 0.2.4.12-alpha. Patch by teor.
  10253. o Minor bugfixes (allocation):
  10254. - Change how we allocate memory for large chunks on buffers, to
  10255. avoid a (currently impossible) integer overflow, and to waste less
  10256. space when allocating unusually large chunks. Fixes bug 20081;
  10257. bugfix on 0.2.0.16-alpha. Issue identified by Guido Vranken.
  10258. - Always include orconfig.h before including any other C headers.
  10259. Sometimes, it includes macros that affect the behavior of the
  10260. standard headers. Fixes bug 19767; bugfix on 0.2.9.1-alpha (the
  10261. first version to use AC_USE_SYSTEM_EXTENSIONS).
  10262. - Fix a syntax error in the IF_BUG_ONCE__() macro in non-GCC-
  10263. compatible compilers. Fixes bug 20141; bugfix on 0.2.9.1-alpha.
  10264. Patch from Gisle Vanem.
  10265. - Stop trying to build with Clang 4.0's -Wthread-safety warnings.
  10266. They apparently require a set of annotations that we aren't
  10267. currently using, and they create false positives in our pthreads
  10268. wrappers. Fixes bug 20110; bugfix on 0.2.9.1-alpha.
  10269. o Minor bugfixes (directory authority):
  10270. - Die with a more useful error when the operator forgets to place
  10271. the authority_signing_key file into the keys directory. This
  10272. avoids an uninformative assert & traceback about having an invalid
  10273. key. Fixes bug 20065; bugfix on 0.2.0.1-alpha.
  10274. - When allowing private addresses, mark Exits that only exit to
  10275. private locations as such. Fixes bug 20064; bugfix
  10276. on 0.2.2.9-alpha.
  10277. o Minor bugfixes (documentation):
  10278. - Document the default PathsNeededToBuildCircuits value that's used
  10279. by clients when the directory authorities don't set
  10280. min_paths_for_circs_pct. Fixes bug 20117; bugfix on 02c320916e02
  10281. in 0.2.4.10-alpha. Patch by teor, reported by Jesse V.
  10282. - Fix manual for the User option: it takes a username, not a UID.
  10283. Fixes bug 19122; bugfix on 0.0.2pre16 (the first version to have
  10284. a manpage!).
  10285. o Minor bugfixes (hidden services):
  10286. - Stop logging intro point details to the client log on certain
  10287. error conditions. Fixed as part of bug 20012; bugfix on
  10288. 0.2.4.8-alpha. Patch by teor.
  10289. o Minor bugfixes (IPv6, testing):
  10290. - Check for IPv6 correctly on Linux when running test networks.
  10291. Fixes bug 19905; bugfix on 0.2.7.3-rc; patch by teor.
  10292. o Minor bugfixes (Linux seccomp2 sandbox):
  10293. - Add permission to run the sched_yield() and sigaltstack() system
  10294. calls, in order to support versions of Tor compiled with asan or
  10295. ubsan code that use these calls. Now "sandbox 1" and
  10296. "--enable-expensive-hardening" should be compatible on more
  10297. systems. Fixes bug 20063; bugfix on 0.2.5.1-alpha.
  10298. o Minor bugfixes (logging):
  10299. - When logging a message from the BUG() macro, be explicit about
  10300. what we were asserting. Previously we were confusing what we were
  10301. asserting with what the bug was. Fixes bug 20093; bugfix
  10302. on 0.2.9.1-alpha.
  10303. - When we are unable to remove the bw_accounting file, do not warn
  10304. if the reason we couldn't remove it was that it didn't exist.
  10305. Fixes bug 19964; bugfix on 0.2.5.4-alpha. Patch from 'pastly'.
  10306. o Minor bugfixes (option parsing):
  10307. - Count unix sockets when counting client listeners (SOCKS, Trans,
  10308. NATD, and DNS). This has no user-visible behaviour changes: these
  10309. options are set once, and never read. Required for correct
  10310. behaviour in ticket 17178. Fixes bug 19677; bugfix on
  10311. 0.2.6.3-alpha. Patch by teor.
  10312. o Minor bugfixes (options):
  10313. - Check the consistency of UseEntryGuards and EntryNodes more
  10314. reliably. Fixes bug 20074; bugfix on 0.2.4.12-alpha. Patch
  10315. by teor.
  10316. - Stop changing the configured value of UseEntryGuards on
  10317. authorities and Tor2web clients. Fixes bug 20074; bugfix on
  10318. commits 51fc6799 in 0.1.1.16-rc and acda1735 in 0.2.4.3-alpha.
  10319. Patch by teor.
  10320. o Minor bugfixes (Tor2web):
  10321. - Prevent Tor2web clients running hidden services, these services
  10322. are not anonymous due to the one-hop client paths. Fixes bug
  10323. 19678. Patch by teor.
  10324. o Minor bugfixes (unit tests):
  10325. - Fix a shared-random unit test that was failing on big endian
  10326. architectures due to internal representation of a integer copied
  10327. to a buffer. The test is changed to take a full 32 bytes of data
  10328. and use the output of a python script that make the COMMIT and
  10329. REVEAL calculation according to the spec. Fixes bug 19977; bugfix
  10330. on 0.2.9.1-alpha.
  10331. - The tor_tls_server_info_callback unit test no longer crashes when
  10332. debug-level logging is turned on. Fixes bug 20041; bugfix
  10333. on 0.2.8.1-alpha.
  10334. Changes in version 0.2.8.8 - 2016-09-23
  10335. Tor 0.2.8.8 fixes two crash bugs present in previous versions of the
  10336. 0.2.8.x series. Relays running 0.2.8.x should upgrade, as should users
  10337. who select public relays as their bridges.
  10338. o Major bugfixes (crash):
  10339. - Fix a complicated crash bug that could affect Tor clients
  10340. configured to use bridges when replacing a networkstatus consensus
  10341. in which one of their bridges was mentioned. OpenBSD users saw
  10342. more crashes here, but all platforms were potentially affected.
  10343. Fixes bug 20103; bugfix on 0.2.8.2-alpha.
  10344. o Major bugfixes (relay, OOM handler):
  10345. - Fix a timing-dependent assertion failure that could occur when we
  10346. tried to flush from a circuit after having freed its cells because
  10347. of an out-of-memory condition. Fixes bug 20203; bugfix on
  10348. 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
  10349. this one.
  10350. o Minor feature (fallback directories):
  10351. - Remove 8 fallbacks that are no longer suitable, leaving 81 of the
  10352. 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March
  10353. 2016. Closes ticket 20190; patch by teor.
  10354. o Minor features (geoip):
  10355. - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
  10356. Country database.
  10357. Changes in version 0.2.9.2-alpha - 2016-08-24
  10358. Tor 0.2.9.2-alpha continues development of the 0.2.9 series with
  10359. several new features and bugfixes. It also includes an important
  10360. authority update and an important bugfix from 0.2.8.7. Everyone who
  10361. sets the ReachableAddresses option, and all bridges, are strongly
  10362. encouraged to upgrade to 0.2.8.7, or to 0.2.9.2-alpha.
  10363. o Directory authority changes (also in 0.2.8.7):
  10364. - The "Tonga" bridge authority has been retired; the new bridge
  10365. authority is "Bifroest". Closes tickets 19728 and 19690.
  10366. o Major bugfixes (client, security, also in 0.2.8.7):
  10367. - Only use the ReachableAddresses option to restrict the first hop
  10368. in a path. In earlier versions of 0.2.8.x, it would apply to
  10369. every hop in the path, with a possible degradation in anonymity
  10370. for anyone using an uncommon ReachableAddress setting. Fixes bug
  10371. 19973; bugfix on 0.2.8.2-alpha.
  10372. o Major features (user interface):
  10373. - Tor now supports the ability to declare options deprecated, so
  10374. that we can recommend that people stop using them. Previously,
  10375. this was done in an ad-hoc way. Closes ticket 19820.
  10376. o Major bugfixes (directory downloads):
  10377. - Avoid resetting download status for consensuses hourly, since we
  10378. already have another, smarter retry mechanism. Fixes bug 8625;
  10379. bugfix on 0.2.0.9-alpha.
  10380. o Minor features (config):
  10381. - Warn users when descriptor and port addresses are inconsistent.
  10382. Mitigates bug 13953; patch by teor.
  10383. o Minor features (geoip):
  10384. - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
  10385. Country database.
  10386. o Minor features (user interface):
  10387. - There is a new --list-deprecated-options command-line option to
  10388. list all of the deprecated options. Implemented as part of
  10389. ticket 19820.
  10390. o Minor bugfixes (code style):
  10391. - Fix an integer signedness conversion issue in the case conversion
  10392. tables. Fixes bug 19168; bugfix on 0.2.1.11-alpha.
  10393. o Minor bugfixes (compilation):
  10394. - Build correctly on versions of libevent2 without support for
  10395. evutil_secure_rng_add_bytes(). Fixes bug 19904; bugfix
  10396. on 0.2.5.4-alpha.
  10397. - Fix a compilation warning on GCC versions before 4.6. Our
  10398. ENABLE_GCC_WARNING macro used the word "warning" as an argument,
  10399. when it is also required as an argument to the compiler pragma.
  10400. Fixes bug 19901; bugfix on 0.2.9.1-alpha.
  10401. o Minor bugfixes (compilation, also in 0.2.8.7):
  10402. - Remove an inappropriate "inline" in tortls.c that was causing
  10403. warnings on older versions of GCC. Fixes bug 19903; bugfix
  10404. on 0.2.8.1-alpha.
  10405. o Minor bugfixes (fallback directories, also in 0.2.8.7):
  10406. - Avoid logging a NULL string pointer when loading fallback
  10407. directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
  10408. and 0.2.8.1-alpha. Report and patch by "rubiate".
  10409. o Minor bugfixes (logging):
  10410. - Log a more accurate message when we fail to dump a microdescriptor.
  10411. Fixes bug 17758; bugfix on 0.2.2.8-alpha. Patch from Daniel Pinto.
  10412. o Minor bugfixes (memory leak):
  10413. - Fix a series of slow memory leaks related to parsing torrc files
  10414. and options. Fixes bug 19466; bugfix on 0.2.1.6-alpha.
  10415. o Deprecated features:
  10416. - A number of DNS-cache-related sub-options for client ports are now
  10417. deprecated for security reasons, and may be removed in a future
  10418. version of Tor. (We believe that client-side DNS caching is a bad
  10419. idea for anonymity, and you should not turn it on.) The options
  10420. are: CacheDNS, CacheIPv4DNS, CacheIPv6DNS, UseDNSCache,
  10421. UseIPv4Cache, and UseIPv6Cache.
  10422. - A number of options are deprecated for security reasons, and may
  10423. be removed in a future version of Tor. The options are:
  10424. AllowDotExit, AllowInvalidNodes, AllowSingleHopCircuits,
  10425. AllowSingleHopExits, ClientDNSRejectInternalAddresses,
  10426. CloseHSClientCircuitsImmediatelyOnTimeout,
  10427. CloseHSServiceRendCircuitsImmediatelyOnTimeout,
  10428. ExcludeSingleHopRelays, FastFirstHopPK, TLSECGroup,
  10429. UseNTorHandshake, and WarnUnsafeSocks.
  10430. - The *ListenAddress options are now deprecated as unnecessary: the
  10431. corresponding *Port options should be used instead. These options
  10432. may someday be removed. The affected options are:
  10433. ControlListenAddress, DNSListenAddress, DirListenAddress,
  10434. NATDListenAddress, ORListenAddress, SocksListenAddress,
  10435. and TransListenAddress.
  10436. o Documentation:
  10437. - Correct the IPv6 syntax in our documentation for the
  10438. VirtualAddrNetworkIPv6 torrc option. Closes ticket 19743.
  10439. o Removed code:
  10440. - We no longer include the (dead, deprecated) bufferevent code in
  10441. Tor. Closes ticket 19450. Based on a patch from U+039b.
  10442. Changes in version 0.2.8.7 - 2016-08-24
  10443. Tor 0.2.8.7 fixes an important bug related to the ReachableAddresses
  10444. option in 0.2.8.6, and replaces a retiring bridge authority. Everyone
  10445. who sets the ReachableAddresses option, and all bridges, are strongly
  10446. encouraged to upgrade.
  10447. o Directory authority changes:
  10448. - The "Tonga" bridge authority has been retired; the new bridge
  10449. authority is "Bifroest". Closes tickets 19728 and 19690.
  10450. o Major bugfixes (client, security):
  10451. - Only use the ReachableAddresses option to restrict the first hop
  10452. in a path. In earlier versions of 0.2.8.x, it would apply to
  10453. every hop in the path, with a possible degradation in anonymity
  10454. for anyone using an uncommon ReachableAddress setting. Fixes bug
  10455. 19973; bugfix on 0.2.8.2-alpha.
  10456. o Minor features (geoip):
  10457. - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
  10458. Country database.
  10459. o Minor bugfixes (compilation):
  10460. - Remove an inappropriate "inline" in tortls.c that was causing
  10461. warnings on older versions of GCC. Fixes bug 19903; bugfix
  10462. on 0.2.8.1-alpha.
  10463. o Minor bugfixes (fallback directories):
  10464. - Avoid logging a NULL string pointer when loading fallback
  10465. directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
  10466. and 0.2.8.1-alpha. Report and patch by "rubiate".
  10467. Changes in version 0.2.9.1-alpha - 2016-08-08
  10468. Tor 0.2.9.1-alpha is the first alpha release in the 0.2.9 development
  10469. series. It improves our support for hardened builds and compiler
  10470. warnings, deploys some critical infrastructure for improvements to
  10471. hidden services, includes a new timing backend that we hope to use for
  10472. better support for traffic padding, makes it easier for programmers to
  10473. log unexpected events, and contains other small improvements to
  10474. security, correctness, and performance.
  10475. Below are the changes since 0.2.8.6.
  10476. o New system requirements:
  10477. - Tor now requires Libevent version 2.0.10-stable or later. Older
  10478. versions of Libevent have less efficient backends for several
  10479. platforms, and lack the DNS code that we use for our server-side
  10480. DNS support. This implements ticket 19554.
  10481. - Tor now requires zlib version 1.2 or later, for security,
  10482. efficiency, and (eventually) gzip support. (Back when we started,
  10483. zlib 1.1 and zlib 1.0 were still found in the wild. 1.2 was
  10484. released in 2003. We recommend the latest version.)
  10485. o Major features (build, hardening):
  10486. - Tor now builds with -ftrapv by default on compilers that support
  10487. it. This option detects signed integer overflow (which C forbids),
  10488. and turns it into a hard-failure. We do not apply this option to
  10489. code that needs to run in constant time to avoid side-channels;
  10490. instead, we use -fwrapv in that code. Closes ticket 17983.
  10491. - When --enable-expensive-hardening is selected, stop applying the
  10492. clang/gcc sanitizers to code that needs to run in constant time.
  10493. Although we are aware of no introduced side-channels, we are not
  10494. able to prove that there are none. Related to ticket 17983.
  10495. o Major features (compilation):
  10496. - Our big list of extra GCC warnings is now enabled by default when
  10497. building with GCC (or with anything like Clang that claims to be
  10498. GCC-compatible). To make all warnings into fatal compilation
  10499. errors, pass --enable-fatal-warnings to configure. Closes
  10500. ticket 19044.
  10501. - Use the Autoconf macro AC_USE_SYSTEM_EXTENSIONS to automatically
  10502. turn on C and POSIX extensions. (Previously, we attempted to do
  10503. this on an ad hoc basis.) Closes ticket 19139.
  10504. o Major features (directory authorities, hidden services):
  10505. - Directory authorities can now perform the shared randomness
  10506. protocol specified by proposal 250. Using this protocol, directory
  10507. authorities generate a global fresh random value every day. In the
  10508. future, this value will be used by hidden services to select
  10509. HSDirs. This release implements the directory authority feature;
  10510. the hidden service side will be implemented in the future as part
  10511. of proposal 224. Resolves ticket 16943; implements proposal 250.
  10512. o Major features (downloading, random exponential backoff):
  10513. - When we fail to download an object from a directory service, wait
  10514. for an (exponentially increasing) randomized amount of time before
  10515. retrying, rather than a fixed interval as we did before. This
  10516. prevents a group of Tor instances from becoming too synchronized,
  10517. or a single Tor instance from becoming too predictable, in its
  10518. download schedule. Closes ticket 15942.
  10519. o Major bugfixes (exit policies):
  10520. - Avoid disclosing exit outbound bind addresses, configured port
  10521. bind addresses, and local interface addresses in relay descriptors
  10522. by default under ExitPolicyRejectPrivate. Instead, only reject
  10523. these (otherwise unlisted) addresses if
  10524. ExitPolicyRejectLocalInterfaces is set. Fixes bug 18456; bugfix on
  10525. 0.2.7.2-alpha. Patch by teor.
  10526. o Major bugfixes (hidden service client):
  10527. - Allow Tor clients with appropriate controllers to work with
  10528. FetchHidServDescriptors set to 0. Previously, this option also
  10529. disabled descriptor cache lookup, thus breaking hidden services
  10530. entirely. Fixes bug 18704; bugfix on 0.2.0.20-rc. Patch by "twim".
  10531. o Minor features (build, hardening):
  10532. - Detect and work around a libclang_rt problem that would prevent
  10533. clang from finding __mulodi4() on some 32-bit platforms, and thus
  10534. keep -ftrapv from linking on those systems. Closes ticket 19079.
  10535. - When building on a system without runtime support for the runtime
  10536. hardening options, try to log a useful warning at configuration
  10537. time, rather than an incomprehensible warning at link time. If
  10538. expensive hardening was requested, this warning becomes an error.
  10539. Closes ticket 18895.
  10540. o Minor features (code safety):
  10541. - In our integer-parsing functions, ensure that maxiumum value we
  10542. give is no smaller than the minimum value. Closes ticket 19063;
  10543. patch from U+039b.
  10544. o Minor features (controller):
  10545. - Implement new GETINFO queries for all downloads that use
  10546. download_status_t to schedule retries. This allows controllers to
  10547. examine the schedule for pending downloads. Closes ticket 19323.
  10548. - Allow controllers to configure basic client authorization on
  10549. hidden services when they create them with the ADD_ONION control
  10550. command. Implements ticket 15588. Patch by "special".
  10551. - Fire a STATUS_SERVER controller event whenever the hibernation
  10552. status changes between "awake"/"soft"/"hard". Closes ticket 18685.
  10553. o Minor features (directory authority):
  10554. - Directory authorities now only give the Guard flag to a relay if
  10555. they are also giving it the Stable flag. This change allows us to
  10556. simplify path selection for clients. It should have minimal effect
  10557. in practice, since >99% of Guards already have the Stable flag.
  10558. Implements ticket 18624.
  10559. - Directory authorities now write their v3-status-votes file out to
  10560. disk earlier in the consensus process, so we have a record of the
  10561. votes even if we abort the consensus process. Resolves
  10562. ticket 19036.
  10563. o Minor features (hidden service):
  10564. - Stop being so strict about the payload length of "rendezvous1"
  10565. cells. We used to be locked in to the "TAP" handshake length, and
  10566. now we can handle better handshakes like "ntor". Resolves
  10567. ticket 18998.
  10568. o Minor features (infrastructure, time):
  10569. - Tor now uses the operating system's monotonic timers (where
  10570. available) for internal fine-grained timing. Previously we would
  10571. look at the system clock, and then attempt to compensate for the
  10572. clock running backwards. Closes ticket 18908.
  10573. - Tor now includes an improved timer backend, so that we can
  10574. efficiently support tens or hundreds of thousands of concurrent
  10575. timers, as will be needed for some of our planned anti-traffic-
  10576. analysis work. This code is based on William Ahern's "timeout.c"
  10577. project, which implements a "tickless hierarchical timing wheel".
  10578. Closes ticket 18365.
  10579. o Minor features (logging):
  10580. - Provide a more useful warning message when configured with an
  10581. invalid Nickname. Closes ticket 18300; patch from "icanhasaccount".
  10582. - When dumping unparseable router descriptors, optionally store them
  10583. in separate files, named by digest, up to a configurable size
  10584. limit. You can change the size limit by setting the
  10585. MaxUnparseableDescSizeToLog option, and disable this feature by
  10586. setting that option to 0. Closes ticket 18322.
  10587. - Add a set of macros to check nonfatal assertions, for internal
  10588. use. Migrating more of our checks to these should help us avoid
  10589. needless crash bugs. Closes ticket 18613.
  10590. o Minor features (performance):
  10591. - Change the "optimistic data" extension from "off by default" to
  10592. "on by default". The default was ordinarily overridden by a
  10593. consensus option, but when clients were bootstrapping for the
  10594. first time, they would not have a consensus to get the option
  10595. from. Changing this default saves a round-trip during startup.
  10596. Closes ticket 18815.
  10597. o Minor features (relay, usability):
  10598. - When the directory authorities refuse a bad relay's descriptor,
  10599. encourage the relay operator to contact us. Many relay operators
  10600. won't notice this line in their logs, but it's a win if even a few
  10601. learn why we don't like what their relay was doing. Resolves
  10602. ticket 18760.
  10603. o Minor features (testing):
  10604. - Let backtrace tests work correctly under AddressSanitizer. Fixes
  10605. part of bug 18934; bugfix on 0.2.5.2-alpha.
  10606. - Move the test-network.sh script to chutney, and modify tor's test-
  10607. network.sh to call the (newer) chutney version when available.
  10608. Resolves ticket 19116. Patch by teor.
  10609. - Use the lcov convention for marking lines as unreachable, so that
  10610. we don't count them when we're generating test coverage data.
  10611. Update our coverage tools to understand this convention. Closes
  10612. ticket 16792.
  10613. o Minor bugfixes (bootstrap):
  10614. - Remember the directory we fetched the consensus or previous
  10615. certificates from, and use it to fetch future authority
  10616. certificates. This change improves bootstrapping performance.
  10617. Fixes bug 18963; bugfix on 0.2.8.1-alpha.
  10618. o Minor bugfixes (build):
  10619. - The test-stem and test-network makefile targets now depend only on
  10620. the tor binary that they are testing. Previously, they depended on
  10621. "make all". Fixes bug 18240; bugfix on 0.2.8.2-alpha. Based on a
  10622. patch from "cypherpunks".
  10623. o Minor bugfixes (circuits):
  10624. - Make sure extend_info_from_router() is only called on servers.
  10625. Fixes bug 19639; bugfix on 0.2.8.1-alpha.
  10626. o Minor bugfixes (compilation):
  10627. - When building with Clang, use a full set of GCC warnings.
  10628. (Previously, we included only a subset, because of the way we
  10629. detected them.) Fixes bug 19216; bugfix on 0.2.0.1-alpha.
  10630. o Minor bugfixes (directory authority):
  10631. - Authorities now sort the "package" lines in their votes, for ease
  10632. of debugging. (They are already sorted in consensus documents.)
  10633. Fixes bug 18840; bugfix on 0.2.6.3-alpha.
  10634. - When parsing a detached signature, make sure we use the length of
  10635. the digest algorithm instead of an hardcoded DIGEST256_LEN in
  10636. order to avoid comparing bytes out-of-bounds with a smaller digest
  10637. length such as SHA1. Fixes bug 19066; bugfix on 0.2.2.6-alpha.
  10638. o Minor bugfixes (documentation):
  10639. - Document the --passphrase-fd option in the tor manpage. Fixes bug
  10640. 19504; bugfix on 0.2.7.3-rc.
  10641. - Fix the description of the --passphrase-fd option in the
  10642. tor-gencert manpage. The option is used to pass the number of a
  10643. file descriptor to read the passphrase from, not to read the file
  10644. descriptor from. Fixes bug 19505; bugfix on 0.2.0.20-alpha.
  10645. o Minor bugfixes (ephemeral hidden service):
  10646. - When deleting an ephemeral hidden service, close its intro points
  10647. even if they are not completely open. Fixes bug 18604; bugfix
  10648. on 0.2.7.1-alpha.
  10649. o Minor bugfixes (guard selection):
  10650. - Use a single entry guard even if the NumEntryGuards consensus
  10651. parameter is not provided. Fixes bug 17688; bugfix
  10652. on 0.2.5.6-alpha.
  10653. - Don't mark guards as unreachable if connection_connect() fails.
  10654. That function fails for local reasons, so it shouldn't reveal
  10655. anything about the status of the guard. Fixes bug 14334; bugfix
  10656. on 0.2.3.10-alpha.
  10657. o Minor bugfixes (hidden service client):
  10658. - Increase the minimum number of internal circuits we preemptively
  10659. build from 2 to 3, so a circuit is available when a client
  10660. connects to another onion service. Fixes bug 13239; bugfix
  10661. on 0.1.0.1-rc.
  10662. o Minor bugfixes (logging):
  10663. - When logging a directory ownership mismatch, log the owning
  10664. username correctly. Fixes bug 19578; bugfix on 0.2.2.29-beta.
  10665. o Minor bugfixes (memory leaks):
  10666. - Fix a small, uncommon memory leak that could occur when reading a
  10667. truncated ed25519 key file. Fixes bug 18956; bugfix
  10668. on 0.2.6.1-alpha.
  10669. o Minor bugfixes (testing):
  10670. - Allow clients to retry HSDirs much faster in test networks. Fixes
  10671. bug 19702; bugfix on 0.2.7.1-alpha. Patch by teor.
  10672. - Disable ASAN's detection of segmentation faults while running
  10673. test_bt.sh, so that we can make sure that our own backtrace
  10674. generation code works. Fixes another aspect of bug 18934; bugfix
  10675. on 0.2.5.2-alpha. Patch from "cypherpunks".
  10676. - Fix the test-network-all target on out-of-tree builds by using the
  10677. correct path to the test driver script. Fixes bug 19421; bugfix
  10678. on 0.2.7.3-rc.
  10679. o Minor bugfixes (time):
  10680. - Improve overflow checks in tv_udiff and tv_mdiff. Fixes bug 19483;
  10681. bugfix on all released tor versions.
  10682. - When computing the difference between two times in milliseconds,
  10683. we now round to the nearest millisecond correctly. Previously, we
  10684. could sometimes round in the wrong direction. Fixes bug 19428;
  10685. bugfix on 0.2.2.2-alpha.
  10686. o Minor bugfixes (user interface):
  10687. - Display a more accurate number of suppressed messages in the log
  10688. rate-limiter. Previously, there was a potential integer overflow
  10689. in the counter. Now, if the number of messages hits a maximum, the
  10690. rate-limiter doesn't count any further. Fixes bug 19435; bugfix
  10691. on 0.2.4.11-alpha.
  10692. - Fix a typo in the passphrase prompt for the ed25519 identity key.
  10693. Fixes bug 19503; bugfix on 0.2.7.2-alpha.
  10694. o Code simplification and refactoring:
  10695. - Remove redundant declarations of the MIN macro. Closes
  10696. ticket 18889.
  10697. - Rename tor_dup_addr() to tor_addr_to_str_dup() to avoid confusion.
  10698. Closes ticket 18462; patch from "icanhasaccount".
  10699. - Split the 600-line directory_handle_command_get function into
  10700. separate functions for different URL types. Closes ticket 16698.
  10701. o Documentation:
  10702. - Fix spelling of "--enable-tor2web-mode" in the manpage. Closes
  10703. ticket 19153. Patch from "U+039b".
  10704. o Removed features:
  10705. - Remove support for "GET /tor/bytes.txt" DirPort request, and
  10706. "GETINFO dir-usage" controller request, which were only available
  10707. via a compile-time option in Tor anyway. Feature was added in
  10708. 0.2.2.1-alpha. Resolves ticket 19035.
  10709. - There is no longer a compile-time option to disable support for
  10710. TransPort. (If you don't want TransPort; just don't use it.) Patch
  10711. from "U+039b". Closes ticket 19449.
  10712. o Testing:
  10713. - Run more workqueue tests as part of "make check". These had
  10714. previously been implemented, but you needed to know special
  10715. command-line options to enable them.
  10716. - We now have unit tests for our code to reject zlib "compression
  10717. bombs". (Fortunately, the code works fine.)
  10718. Changes in version 0.2.8.6 - 2016-08-02
  10719. Tor 0.2.8.6 is the first stable version of the Tor 0.2.8 series.
  10720. The Tor 0.2.8 series improves client bootstrapping performance,
  10721. completes the authority-side implementation of improved identity
  10722. keys for relays, and includes numerous bugfixes and performance
  10723. improvements throughout the program. This release continues to
  10724. improve the coverage of Tor's test suite. For a full list of
  10725. changes since Tor 0.2.7, see the ReleaseNotes file.
  10726. Changes since 0.2.8.5-rc:
  10727. o Minor features (geoip):
  10728. - Update geoip and geoip6 to the July 6 2016 Maxmind GeoLite2
  10729. Country database.
  10730. o Minor bugfixes (compilation):
  10731. - Fix a compilation warning in the unit tests on systems where char
  10732. is signed. Fixes bug 19682; bugfix on 0.2.8.1-alpha.
  10733. o Minor bugfixes (fallback directories):
  10734. - Remove 1 fallback that was on the hardcoded list, then opted-out,
  10735. leaving 89 of the 100 fallbacks originally introduced in Tor
  10736. 0.2.8.2-alpha in March 2016. Closes ticket 19782; patch by teor.
  10737. o Minor bugfixes (Linux seccomp2 sandbox):
  10738. - Allow more syscalls when running with "Sandbox 1" enabled:
  10739. sysinfo, getsockopt(SO_SNDBUF), and setsockopt(SO_SNDBUFFORCE). On
  10740. some systems, these are required for Tor to start. Fixes bug
  10741. 18397; bugfix on 0.2.5.1-alpha. Patch from Daniel Pinto.
  10742. - Allow IPPROTO_UDP datagram sockets when running with "Sandbox 1",
  10743. so that get_interface_address6_via_udp_socket_hack() can work.
  10744. Fixes bug 19660; bugfix on 0.2.5.1-alpha.
  10745. Changes in version 0.2.8.5-rc - 2016-07-07
  10746. Tor 0.2.8.5-rc is the second release candidate in the Tor 0.2.8
  10747. series. If we find no new bugs or regressions here, the first stable
  10748. 0.2.8 release will be identical to it. It has a few small bugfixes
  10749. against previous versions.
  10750. o Directory authority changes:
  10751. - Urras is no longer a directory authority. Closes ticket 19271.
  10752. o Major bugfixes (heartbeat):
  10753. - Fix a regression that would crash Tor when the periodic
  10754. "heartbeat" log messages were disabled. Fixes bug 19454; bugfix on
  10755. 0.2.8.1-alpha. Reported by "kubaku".
  10756. o Minor features (build):
  10757. - Tor now again builds with the recent OpenSSL 1.1 development
  10758. branch (tested against 1.1.0-pre6-dev). Closes ticket 19499.
  10759. - When building manual pages, set the timezone to "UTC", so that the
  10760. output is reproducible. Fixes bug 19558; bugfix on 0.2.2.9-alpha.
  10761. Patch from intrigeri.
  10762. o Minor bugfixes (fallback directory selection):
  10763. - Avoid errors during fallback selection if there are no eligible
  10764. fallbacks. Fixes bug 19480; bugfix on 0.2.8.3-alpha. Patch
  10765. by teor.
  10766. o Minor bugfixes (IPv6, microdescriptors):
  10767. - Don't check node addresses when we only have a routerstatus. This
  10768. allows IPv6-only clients to bootstrap by fetching microdescriptors
  10769. from fallback directory mirrors. (The microdescriptor consensus
  10770. has no IPv6 addresses in it.) Fixes bug 19608; bugfix
  10771. on 0.2.8.2-alpha.
  10772. o Minor bugfixes (logging):
  10773. - Reduce pointlessly verbose log messages when directory servers
  10774. can't be found. Fixes bug 18849; bugfix on 0.2.8.3-alpha and
  10775. 0.2.8.1-alpha. Patch by teor.
  10776. - When a fallback directory changes its fingerprint from the hard-
  10777. coded fingerprint, log a less severe, more explanatory log
  10778. message. Fixes bug 18812; bugfix on 0.2.8.1-alpha. Patch by teor.
  10779. o Minor bugfixes (Linux seccomp2 sandboxing):
  10780. - Allow statistics to be written to disk when "Sandbox 1" is
  10781. enabled. Fixes bugs 19556 and 19957; bugfix on 0.2.5.1-alpha and
  10782. 0.2.6.1-alpha respectively.
  10783. o Minor bugfixes (user interface):
  10784. - Remove a warning message "Service [scrubbed] not found after
  10785. descriptor upload". This message appears when one uses HSPOST
  10786. control command to upload a service descriptor. Since there is
  10787. only a descriptor and no service, showing this message is
  10788. pointless and confusing. Fixes bug 19464; bugfix on 0.2.7.2-alpha.
  10789. o Fallback directory list:
  10790. - Add a comment to the generated fallback directory list that
  10791. explains how to comment out unsuitable fallbacks in a way that's
  10792. compatible with the stem fallback parser.
  10793. - Update fallback whitelist and blacklist based on relay operator
  10794. emails. Blacklist unsuitable (non-working, over-volatile)
  10795. fallbacks. Resolves ticket 19071. Patch by teor.
  10796. - Remove 10 unsuitable fallbacks, leaving 90 of the 100 fallbacks
  10797. originally introduced in Tor 0.2.8.2-alpha in March 2016. Closes
  10798. ticket 19071; patch by teor.
  10799. Changes in version 0.2.8.4-rc - 2016-06-15
  10800. Tor 0.2.8.4-rc is the first release candidate in the Tor 0.2.8 series.
  10801. If we find no new bugs or regressions here, the first stable 0.2.8
  10802. release will be identical to it. It has a few small bugfixes against
  10803. previous versions.
  10804. o Major bugfixes (user interface):
  10805. - Correctly give a warning in the cases where a relay is specified
  10806. by nickname, and one such relay is found, but it is not officially
  10807. Named. Fixes bug 19203; bugfix on 0.2.3.1-alpha.
  10808. o Minor features (build):
  10809. - Tor now builds once again with the recent OpenSSL 1.1 development
  10810. branch (tested against 1.1.0-pre5 and 1.1.0-pre6-dev).
  10811. o Minor features (geoip):
  10812. - Update geoip and geoip6 to the June 7 2016 Maxmind GeoLite2
  10813. Country database.
  10814. o Minor bugfixes (compilation):
  10815. - Cause the unit tests to compile correctly on mingw64 versions that
  10816. lack sscanf. Fixes bug 19213; bugfix on 0.2.7.1-alpha.
  10817. o Minor bugfixes (downloading):
  10818. - Predict more correctly whether we'll be downloading over HTTP when
  10819. we determine the maximum length of a URL. This should avoid a
  10820. "BUG" warning about the Squid HTTP proxy and its URL limits. Fixes
  10821. bug 19191.
  10822. Changes in version 0.2.8.3-alpha - 2016-05-26
  10823. Tor 0.2.8.3-alpha resolves several bugs, most of them introduced over
  10824. the course of the 0.2.8 development cycle. It improves the behavior of
  10825. directory clients, fixes several crash bugs, fixes a gap in compiler
  10826. hardening, and allows the full integration test suite to run on
  10827. more platforms.
  10828. o Major bugfixes (security, client, DNS proxy):
  10829. - Stop a crash that could occur when a client running with DNSPort
  10830. received a query with multiple address types, and the first
  10831. address type was not supported. Found and fixed by Scott Dial.
  10832. Fixes bug 18710; bugfix on 0.2.5.4-alpha.
  10833. o Major bugfixes (security, compilation):
  10834. - Correctly detect compiler flags on systems where _FORTIFY_SOURCE
  10835. is predefined. Previously, our use of -D_FORTIFY_SOURCE would
  10836. cause a compiler warning, thereby making other checks fail, and
  10837. needlessly disabling compiler-hardening support. Fixes one case of
  10838. bug 18841; bugfix on 0.2.3.17-beta. Patch from "trudokal".
  10839. o Major bugfixes (security, directory authorities):
  10840. - Fix a crash and out-of-bounds write during authority voting, when
  10841. the list of relays includes duplicate ed25519 identity keys. Fixes
  10842. bug 19032; bugfix on 0.2.8.2-alpha.
  10843. o Major bugfixes (client, bootstrapping):
  10844. - Check if bootstrap consensus downloads are still needed when the
  10845. linked connection attaches. This prevents tor making unnecessary
  10846. begindir-style connections, which are the only directory
  10847. connections tor clients make since the fix for 18483 was merged.
  10848. - Fix some edge cases where consensus download connections may not
  10849. have been closed, even though they were not needed. Related to fix
  10850. for 18809.
  10851. - Make relays retry consensus downloads the correct number of times,
  10852. rather than the more aggressive client retry count. Fixes part of
  10853. ticket 18809.
  10854. - Stop downloading consensuses when we have a consensus, even if we
  10855. don't have all the certificates for it yet. Fixes bug 18809;
  10856. bugfix on 0.2.8.1-alpha. Patches by arma and teor.
  10857. o Major bugfixes (directory mirrors):
  10858. - Decide whether to advertise begindir support in the the same way
  10859. we decide whether to advertise our DirPort. Allowing these
  10860. decisions to become out-of-sync led to surprising behavior like
  10861. advertising begindir support when hibernation made us not
  10862. advertise a DirPort. Resolves bug 18616; bugfix on 0.2.8.1-alpha.
  10863. Patch by teor.
  10864. o Major bugfixes (IPv6 bridges, client):
  10865. - Actually use IPv6 addresses when selecting directory addresses for
  10866. IPv6 bridges. Fixes bug 18921; bugfix on 0.2.8.1-alpha. Patch
  10867. by "teor".
  10868. o Major bugfixes (key management):
  10869. - If OpenSSL fails to generate an RSA key, do not retain a dangling
  10870. pointer to the previous (uninitialized) key value. The impact here
  10871. should be limited to a difficult-to-trigger crash, if OpenSSL is
  10872. running an engine that makes key generation failures possible, or
  10873. if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
  10874. 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
  10875. Baishakhi Ray.
  10876. o Major bugfixes (testing):
  10877. - Fix a bug that would block 'make test-network-all' on systems where
  10878. IPv6 packets were lost. Fixes bug 19008; bugfix on 0.2.7.3-rc.
  10879. - Avoid "WSANOTINITIALISED" warnings in the unit tests. Fixes bug 18668;
  10880. bugfix on 0.2.8.1-alpha.
  10881. o Minor features (clients):
  10882. - Make clients, onion services, and bridge relays always use an
  10883. encrypted begindir connection for directory requests. Resolves
  10884. ticket 18483. Patch by "teor".
  10885. o Minor features (fallback directory mirrors):
  10886. - Give each fallback the same weight for client selection; restrict
  10887. fallbacks to one per operator; report fallback directory detail
  10888. changes when rebuilding list; add new fallback directory mirrors
  10889. to the whitelist; and many other minor simplifications and fixes.
  10890. Closes tasks 17905, 18749, bug 18689, and fixes part of bug 18812 on
  10891. 0.2.8.1-alpha; patch by "teor".
  10892. - Replace the 21 fallbacks generated in January 2016 and included in
  10893. Tor 0.2.8.1-alpha, with a list of 100 fallbacks generated in March
  10894. 2016. Closes task 17158; patch by "teor".
  10895. o Minor features (geoip):
  10896. - Update geoip and geoip6 to the May 4 2016 Maxmind GeoLite2
  10897. Country database.
  10898. o Minor bugfixes (assert, portability):
  10899. - Fix an assertion failure in memarea.c on systems where "long" is
  10900. shorter than the size of a pointer. Fixes bug 18716; bugfix
  10901. on 0.2.1.1-alpha.
  10902. o Minor bugfixes (bootstrap):
  10903. - Consistently use the consensus download schedule for authority
  10904. certificates. Fixes bug 18816; bugfix on 0.2.4.13-alpha.
  10905. o Minor bugfixes (build):
  10906. - Remove a pair of redundant AM_CONDITIONAL declarations from
  10907. configure.ac. Fixes one final case of bug 17744; bugfix
  10908. on 0.2.8.2-alpha.
  10909. - Resolve warnings when building on systems that are concerned with
  10910. signed char. Fixes bug 18728; bugfix on 0.2.7.2-alpha
  10911. and 0.2.6.1-alpha.
  10912. - When libscrypt.h is found, but no libscrypt library can be linked,
  10913. treat libscrypt as absent. Fixes bug 19161; bugfix
  10914. on 0.2.6.1-alpha.
  10915. o Minor bugfixes (client):
  10916. - Turn all TestingClientBootstrap* into non-testing torrc options.
  10917. This changes simply renames them by removing "Testing" in front of
  10918. them and they do not require TestingTorNetwork to be enabled
  10919. anymore. Fixes bug 18481; bugfix on 0.2.8.1-alpha.
  10920. - Make directory node selection more reliable, mainly for IPv6-only
  10921. clients and clients with few reachable addresses. Fixes bug 18929;
  10922. bugfix on 0.2.8.1-alpha. Patch by "teor".
  10923. o Minor bugfixes (controller, microdescriptors):
  10924. - Make GETINFO dir/status-vote/current/consensus conform to the
  10925. control specification by returning "551 Could not open cached
  10926. consensus..." when not caching consensuses. Fixes bug 18920;
  10927. bugfix on 0.2.2.6-alpha.
  10928. o Minor bugfixes (crypto, portability):
  10929. - The SHA3 and SHAKE routines now produce the correct output on Big
  10930. Endian systems. No code calls either algorithm yet, so this is
  10931. primarily a build fix. Fixes bug 18943; bugfix on 0.2.8.1-alpha.
  10932. - Tor now builds again with the recent OpenSSL 1.1 development
  10933. branch (tested against 1.1.0-pre4 and 1.1.0-pre5-dev). Closes
  10934. ticket 18286.
  10935. o Minor bugfixes (directories):
  10936. - When fetching extrainfo documents, compare their SHA256 digests
  10937. and Ed25519 signing key certificates with the routerinfo that led
  10938. us to fetch them, rather than with the most recent routerinfo.
  10939. Otherwise we generate many spurious warnings about mismatches.
  10940. Fixes bug 17150; bugfix on 0.2.7.2-alpha.
  10941. o Minor bugfixes (logging):
  10942. - When we can't generate a signing key because OfflineMasterKey is
  10943. set, do not imply that we should have been able to load it. Fixes
  10944. bug 18133; bugfix on 0.2.7.2-alpha.
  10945. - Stop periodic_event_dispatch() from blasting twelve lines per
  10946. second at loglevel debug. Fixes bug 18729; fix on 0.2.8.1-alpha.
  10947. - When rejecting a misformed INTRODUCE2 cell, only log at
  10948. PROTOCOL_WARN severity. Fixes bug 18761; bugfix on 0.2.8.2-alpha.
  10949. o Minor bugfixes (pluggable transports):
  10950. - Avoid reporting a spurious error when we decide that we don't need
  10951. to terminate a pluggable transport because it has already exited.
  10952. Fixes bug 18686; bugfix on 0.2.5.5-alpha.
  10953. o Minor bugfixes (pointer arithmetic):
  10954. - Fix a bug in memarea_alloc() that could have resulted in remote
  10955. heap write access, if Tor had ever passed an unchecked size to
  10956. memarea_alloc(). Fortunately, all the sizes we pass to
  10957. memarea_alloc() are pre-checked to be less than 128 kilobytes.
  10958. Fixes bug 19150; bugfix on 0.2.1.1-alpha. Bug found by
  10959. Guido Vranken.
  10960. o Minor bugfixes (relays):
  10961. - Consider more config options when relays decide whether to
  10962. regenerate their descriptor. Fixes more of bug 12538; bugfix
  10963. on 0.2.8.1-alpha.
  10964. - Resolve some edge cases where we might launch an ORPort
  10965. reachability check even when DisableNetwork is set. Noticed while
  10966. fixing bug 18616; bugfix on 0.2.3.9-alpha.
  10967. o Minor bugfixes (statistics):
  10968. - We now include consensus downloads via IPv6 in our directory-
  10969. request statistics. Fixes bug 18460; bugfix on 0.2.3.14-alpha.
  10970. o Minor bugfixes (testing):
  10971. - Allow directories in small networks to bootstrap by skipping
  10972. DirPort checks when the consensus has no exits. Fixes bug 19003;
  10973. bugfix on 0.2.8.1-alpha. Patch by teor.
  10974. - Fix a small memory leak that would occur when the
  10975. TestingEnableCellStatsEvent option was turned on. Fixes bug 18673;
  10976. bugfix on 0.2.5.2-alpha.
  10977. o Minor bugfixes (time handling):
  10978. - When correcting a corrupt 'struct tm' value, fill in the tm_wday
  10979. field. Otherwise, our unit tests crash on Windows. Fixes bug
  10980. 18977; bugfix on 0.2.2.25-alpha.
  10981. o Documentation:
  10982. - Document the contents of the 'datadir/keys' subdirectory in the
  10983. manual page. Closes ticket 17621.
  10984. - Stop recommending use of nicknames to identify relays in our
  10985. MapAddress documentation. Closes ticket 18312.
  10986. Changes in version 0.2.8.2-alpha - 2016-03-28
  10987. Tor 0.2.8.2-alpha is the second alpha in its series. It fixes numerous
  10988. bugs in earlier versions of Tor, including some that prevented
  10989. authorities using Tor 0.2.7.x from running correctly. IPv6 and
  10990. directory support should also be much improved.
  10991. o New system requirements:
  10992. - Tor no longer supports versions of OpenSSL with a broken
  10993. implementation of counter mode. (This bug was present in OpenSSL
  10994. 1.0.0, and was fixed in OpenSSL 1.0.0a.) Tor still detects, but no
  10995. longer runs with, these versions.
  10996. - Tor no longer attempts to support platforms where the "time_t"
  10997. type is unsigned. (To the best of our knowledge, only OpenVMS does
  10998. this, and Tor has never actually built on OpenVMS.) Closes
  10999. ticket 18184.
  11000. - Tor now uses Autoconf version 2.63 or later, and Automake 1.11 or
  11001. later (released in 2008 and 2009 respectively). If you are
  11002. building Tor from the git repository instead of from the source
  11003. distribution, and your tools are older than this, you will need to
  11004. upgrade. Closes ticket 17732.
  11005. o Major bugfixes (security, pointers):
  11006. - Avoid a difficult-to-trigger heap corruption attack when extending
  11007. a smartlist to contain over 16GB of pointers. Fixes bug 18162;
  11008. bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
  11009. Reported by Guido Vranken.
  11010. o Major bugfixes (bridges, pluggable transports):
  11011. - Modify the check for OR connections to private addresses. Allow
  11012. bridges on private addresses, including pluggable transports that
  11013. ignore the (potentially private) address in the bridge line. Fixes
  11014. bug 18517; bugfix on 0.2.8.1-alpha. Reported by gk, patch by teor.
  11015. o Major bugfixes (compilation):
  11016. - Repair hardened builds under the clang compiler. Previously, our
  11017. use of _FORTIFY_SOURCE would conflict with clang's address
  11018. sanitizer. Fixes bug 14821; bugfix on 0.2.5.4-alpha.
  11019. o Major bugfixes (crash on shutdown):
  11020. - Correctly handle detaching circuits from muxes when shutting down.
  11021. Fixes bug 18116; bugfix on 0.2.8.1-alpha.
  11022. - Fix an assert-on-exit bug related to counting memory usage in
  11023. rephist.c. Fixes bug 18651; bugfix on 0.2.8.1-alpha.
  11024. o Major bugfixes (crash on startup):
  11025. - Fix a segfault during startup: If a Unix domain socket was
  11026. configured as listener (such as a ControlSocket or a SocksPort
  11027. "unix:" socket), and tor was started as root but not configured to
  11028. switch to another user, tor would segfault while trying to string
  11029. compare a NULL value. Fixes bug 18261; bugfix on 0.2.8.1-alpha.
  11030. Patch by weasel.
  11031. o Major bugfixes (dns proxy mode, crash):
  11032. - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
  11033. bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
  11034. o Major bugfixes (relays, bridge clients):
  11035. - Ensure relays always allow IPv4 OR and Dir connections. Ensure
  11036. bridge clients use the address configured in the bridge line.
  11037. Fixes bug 18348; bugfix on 0.2.8.1-alpha. Reported by sysrqb,
  11038. patch by teor.
  11039. o Major bugfixes (voting):
  11040. - Actually enable support for authorities to match routers by their
  11041. Ed25519 identities. Previously, the code had been written, but
  11042. some debugging code that had accidentally been left in the
  11043. codebase made it stay turned off. Fixes bug 17702; bugfix
  11044. on 0.2.7.2-alpha.
  11045. - When collating votes by Ed25519 identities, authorities now
  11046. include a "NoEdConsensus" flag if the ed25519 value (or lack
  11047. thereof) for a server does not reflect the majority consensus.
  11048. Related to bug 17668; bugfix on 0.2.7.2-alpha.
  11049. - When generating a vote with keypinning disabled, never include two
  11050. entries for the same ed25519 identity. This bug was causing
  11051. authorities to generate votes that they could not parse when a
  11052. router violated key pinning by changing its RSA identity but
  11053. keeping its Ed25519 identity. Fixes bug 17668; fixes part of bug
  11054. 18318. Bugfix on 0.2.7.2-alpha.
  11055. o Minor features (security, win32):
  11056. - Set SO_EXCLUSIVEADDRUSE on Win32 to avoid a local port-stealing
  11057. attack. Fixes bug 18123; bugfix on all tor versions. Patch
  11058. by teor.
  11059. o Minor features (bug-resistance):
  11060. - Make Tor survive errors involving connections without a
  11061. corresponding event object. Previously we'd fail with an
  11062. assertion; now we produce a log message. Related to bug 16248.
  11063. o Minor features (build):
  11064. - Detect systems with FreeBSD-derived kernels (such as GNU/kFreeBSD)
  11065. as having possible IPFW support. Closes ticket 18448. Patch from
  11066. Steven Chamberlain.
  11067. o Minor features (code hardening):
  11068. - Use tor_snprintf() and tor_vsnprintf() even in external and low-
  11069. level code, to harden against accidental failures to NUL-
  11070. terminate. Part of ticket 17852. Patch from jsturgix. Found
  11071. with Flawfinder.
  11072. o Minor features (crypto):
  11073. - Validate the hard-coded Diffie-Hellman parameters and ensure that
  11074. p is a safe prime, and g is a suitable generator. Closes
  11075. ticket 18221.
  11076. o Minor features (geoip):
  11077. - Update geoip and geoip6 to the March 3 2016 Maxmind GeoLite2
  11078. Country database.
  11079. o Minor features (hidden service directory):
  11080. - Streamline relay-side hsdir handling: when relays consider whether
  11081. to accept an uploaded hidden service descriptor, they no longer
  11082. check whether they are one of the relays in the network that is
  11083. "supposed" to handle that descriptor. Implements ticket 18332.
  11084. o Minor features (IPv6):
  11085. - Add ClientPreferIPv6DirPort, which is set to 0 by default. If set
  11086. to 1, tor prefers IPv6 directory addresses.
  11087. - Add ClientUseIPv4, which is set to 1 by default. If set to 0, tor
  11088. avoids using IPv4 for client OR and directory connections.
  11089. - Try harder to obey the IP version restrictions "ClientUseIPv4 0",
  11090. "ClientUseIPv6 0", "ClientPreferIPv6ORPort", and
  11091. "ClientPreferIPv6DirPort". Closes ticket 17840; patch by teor.
  11092. o Minor features (linux seccomp2 sandbox):
  11093. - Reject attempts to change our Address with "Sandbox 1" enabled.
  11094. Changing Address with Sandbox turned on would never actually work,
  11095. but previously it would fail in strange and confusing ways. Found
  11096. while fixing 18548.
  11097. o Minor features (robustness):
  11098. - Exit immediately with an error message if the code attempts to use
  11099. Libevent without having initialized it. This should resolve some
  11100. frequently-made mistakes in our unit tests. Closes ticket 18241.
  11101. o Minor features (unix domain sockets):
  11102. - Add a new per-socket option, RelaxDirModeCheck, to allow creating
  11103. Unix domain sockets without checking the permissions on the parent
  11104. directory. (Tor checks permissions by default because some
  11105. operating systems only check permissions on the parent directory.
  11106. However, some operating systems do look at permissions on the
  11107. socket, and tor's default check is unneeded.) Closes ticket 18458.
  11108. Patch by weasel.
  11109. o Minor bugfixes (exit policies, security):
  11110. - Refresh an exit relay's exit policy when interface addresses
  11111. change. Previously, tor only refreshed the exit policy when the
  11112. configured external address changed. Fixes bug 18208; bugfix on
  11113. 0.2.7.3-rc. Patch by teor.
  11114. o Minor bugfixes (security, hidden services):
  11115. - Prevent hidden services connecting to client-supplied rendezvous
  11116. addresses that are reserved as internal or multicast. Fixes bug
  11117. 8976; bugfix on 0.2.3.21-rc. Patch by dgoulet and teor.
  11118. o Minor bugfixes (build):
  11119. - Do not link the unit tests against both the testing and non-
  11120. testing versions of the static libraries. Fixes bug 18490; bugfix
  11121. on 0.2.7.1-alpha.
  11122. - Avoid spurious failures from configure files related to calling
  11123. exit(0) in TOR_SEARCH_LIBRARY. Fixes bug 18626; bugfix on
  11124. 0.2.0.1-alpha. Patch from "cypherpunks".
  11125. - Silence spurious clang-scan warnings in the ed25519_donna code by
  11126. explicitly initializing some objects. Fixes bug 18384; bugfix on
  11127. 0.2.7.2-alpha. Patch by teor.
  11128. o Minor bugfixes (client, bootstrap):
  11129. - Count receipt of new microdescriptors as progress towards
  11130. bootstrapping. Previously, with EntryNodes set, Tor might not
  11131. successfully repopulate the guard set on bootstrapping. Fixes bug
  11132. 16825; bugfix on 0.2.3.1-alpha.
  11133. o Minor bugfixes (code correctness):
  11134. - Update to the latest version of Trunnel, which tries harder to
  11135. avoid generating code that can invoke memcpy(p,NULL,0). Bug found
  11136. by clang address sanitizer. Fixes bug 18373; bugfix
  11137. on 0.2.7.2-alpha.
  11138. o Minor bugfixes (configuration):
  11139. - Fix a tiny memory leak when parsing a port configuration ending in
  11140. ":auto". Fixes bug 18374; bugfix on 0.2.3.3-alpha.
  11141. o Minor bugfixes (containers):
  11142. - If we somehow attempt to construct a heap with more than
  11143. 1073741822 elements, avoid an integer overflow when maintaining
  11144. the heap property. Fixes bug 18296; bugfix on 0.1.2.1-alpha.
  11145. o Minor bugfixes (correctness):
  11146. - Fix a bad memory handling bug that would occur if we had queued a
  11147. cell on a channel's incoming queue. Fortunately, we can't actually
  11148. queue a cell like that as our code is constructed today, but it's
  11149. best to avoid this kind of error, even if there isn't any code
  11150. that triggers it today. Fixes bug 18570; bugfix on 0.2.4.4-alpha.
  11151. o Minor bugfixes (directory):
  11152. - When generating a URL for a directory server on an IPv6 address,
  11153. wrap the IPv6 address in square brackets. Fixes bug 18051; bugfix
  11154. on 0.2.3.9-alpha. Patch from Malek.
  11155. o Minor bugfixes (fallback directory mirrors):
  11156. - When requesting extrainfo descriptors from a trusted directory
  11157. server, check whether it is an authority or a fallback directory
  11158. which supports extrainfo descriptors. Fixes bug 18489; bugfix on
  11159. 0.2.4.7-alpha. Reported by atagar, patch by teor.
  11160. o Minor bugfixes (hidden service, client):
  11161. - Handle the case where the user makes several fast consecutive
  11162. requests to the same .onion address. Previously, the first six
  11163. requests would each trigger a descriptor fetch, each picking a
  11164. directory (there are 6 overall) and the seventh one would fail
  11165. because no directories were left, thereby triggering a close on
  11166. all current directory connections asking for the hidden service.
  11167. The solution here is to not close the connections if we have
  11168. pending directory fetches. Fixes bug 15937; bugfix
  11169. on 0.2.7.1-alpha.
  11170. o Minor bugfixes (hidden service, control port):
  11171. - Add the onion address to the HS_DESC event for the UPLOADED action
  11172. both on success or failure. It was previously hardcoded with
  11173. UNKNOWN. Fixes bug 16023; bugfix on 0.2.7.2-alpha.
  11174. o Minor bugfixes (hidden service, directory):
  11175. - Bridges now refuse "rendezvous2" (hidden service descriptor)
  11176. publish attempts. Suggested by ticket 18332.
  11177. o Minor bugfixes (linux seccomp2 sandbox):
  11178. - Allow the setrlimit syscall, and the prlimit and prlimit64
  11179. syscalls, which some libc implementations use under the hood.
  11180. Fixes bug 15221; bugfix on 0.2.5.1-alpha.
  11181. - Avoid a 10-second delay when starting as a client with "Sandbox 1"
  11182. enabled and no DNS resolvers configured. This should help TAILS
  11183. start up faster. Fixes bug 18548; bugfix on 0.2.5.1-alpha.
  11184. - Fix the sandbox's interoperability with unix domain sockets under
  11185. setuid. Fixes bug 18253; bugfix on 0.2.8.1-alpha.
  11186. o Minor bugfixes (logging):
  11187. - When logging information about an unparsable networkstatus vote or
  11188. consensus, do not say "vote" when we mean consensus. Fixes bug
  11189. 18368; bugfix on 0.2.0.8-alpha.
  11190. - Scrub service name in "unrecognized service ID" log messages.
  11191. Fixes bug 18600; bugfix on 0.2.4.11-alpha.
  11192. - Downgrade logs and backtraces about IP versions to info-level.
  11193. Only log backtraces once each time tor runs. Assists in diagnosing
  11194. bug 18351; bugfix on 0.2.8.1-alpha. Reported by sysrqb and
  11195. Christian, patch by teor.
  11196. o Minor bugfixes (memory safety):
  11197. - Avoid freeing an uninitialized pointer when opening a socket fails
  11198. in get_interface_addresses_ioctl(). Fixes bug 18454; bugfix on
  11199. 0.2.3.11-alpha. Reported by toralf and "cypherpunks", patch
  11200. by teor.
  11201. - Correctly duplicate addresses in get_interface_address6_list().
  11202. Fixes bug 18454; bugfix on 0.2.8.1-alpha. Reported by toralf,
  11203. patch by "cypherpunks".
  11204. - Fix a memory leak in tor-gencert. Fixes part of bug 18672; bugfix
  11205. on 0.2.0.1-alpha.
  11206. - Fix a memory leak in "tor --list-fingerprint". Fixes part of bug
  11207. 18672; bugfix on 0.2.5.1-alpha.
  11208. o Minor bugfixes (private directory):
  11209. - Prevent a race condition when creating private directories. Fixes
  11210. part of bug 17852; bugfix on 0.0.2pre13. Part of ticket 17852.
  11211. Patch from jsturgix. Found with Flawfinder.
  11212. o Minor bugfixes (test networks, IPv6):
  11213. - Allow internal IPv6 addresses in descriptors in test networks.
  11214. Fixes bug 17153; bugfix on 0.2.3.16-alpha. Patch by teor, reported
  11215. by karsten.
  11216. o Minor bugfixes (testing):
  11217. - We no longer disable assertions in the unit tests when coverage is
  11218. enabled. Instead, we require you to say --disable-asserts-in-tests
  11219. to the configure script if you need assertions disabled in the
  11220. unit tests (for example, if you want to perform branch coverage).
  11221. Fixes bug 18242; bugfix on 0.2.7.1-alpha.
  11222. o Minor bugfixes (time parsing):
  11223. - Avoid overflow in tor_timegm when parsing dates in and after 2038
  11224. on platforms with 32-bit time_t. Fixes bug 18479; bugfix on
  11225. 0.0.2pre14. Patch by teor.
  11226. o Minor bugfixes (tor-gencert):
  11227. - Correctly handle the case where an authority operator enters a
  11228. passphrase but sends an EOF before sending a newline. Fixes bug
  11229. 17443; bugfix on 0.2.0.20-rc. Found by junglefowl.
  11230. o Code simplification and refactoring:
  11231. - Quote all the string interpolations in configure.ac -- even those
  11232. which we are pretty sure can't contain spaces. Closes ticket
  11233. 17744. Patch from zerosion.
  11234. - Remove specialized code for non-inplace AES_CTR. 99% of our AES is
  11235. inplace, so there's no need to have a separate implementation for
  11236. the non-inplace code. Closes ticket 18258. Patch from Malek.
  11237. - Simplify return types for some crypto functions that can't
  11238. actually fail. Patch from Hassan Alsibyani. Closes ticket 18259.
  11239. o Documentation:
  11240. - Change build messages to refer to "Fedora" instead of "Fedora
  11241. Core", and "dnf" instead of "yum". Closes tickets 18459 and 18426.
  11242. Patches from "icanhasaccount" and "cypherpunks".
  11243. o Removed features:
  11244. - We no longer maintain an internal freelist in memarea.c.
  11245. Allocators should be good enough to make this code unnecessary,
  11246. and it's doubtful that it ever had any performance benefit.
  11247. o Testing:
  11248. - Fix several warnings from clang's address sanitizer produced in
  11249. the unit tests.
  11250. - Treat backtrace test failures as expected on FreeBSD until we
  11251. solve bug 17808. Closes ticket 18204.
  11252. Changes in version 0.2.8.1-alpha - 2016-02-04
  11253. Tor 0.2.8.1-alpha is the first alpha release in its series. It
  11254. includes numerous small features and bugfixes against previous Tor
  11255. versions, and numerous small infrastructure improvements. The most
  11256. notable features are a set of improvements to the directory subsystem.
  11257. o Major features (security, Linux):
  11258. - When Tor starts as root on Linux and is told to switch user ID, it
  11259. can now retain the capability to bind to low ports. By default,
  11260. Tor will do this only when it's switching user ID and some low
  11261. ports have been configured. You can change this behavior with the
  11262. new option KeepBindCapabilities. Closes ticket 8195.
  11263. o Major features (directory system):
  11264. - When bootstrapping multiple consensus downloads at a time, use the
  11265. first one that starts downloading, and close the rest. This
  11266. reduces failures when authorities or fallback directories are slow
  11267. or down. Together with the code for feature 15775, this feature
  11268. should reduces failures due to fallback churn. Implements ticket
  11269. 4483. Patch by "teor". Implements IPv4 portions of proposal 210 by
  11270. "mikeperry" and "teor".
  11271. - Include a trial list of 21 default fallback directories, generated
  11272. in January 2016, based on an opt-in survey of suitable relays.
  11273. Doing this should make clients bootstrap more quickly and reliably,
  11274. and reduce the load on the directory authorities. Closes ticket
  11275. 15775. Patch by "teor".
  11276. Candidates identified using an OnionOO script by "weasel", "teor",
  11277. "gsathya", and "karsten".
  11278. - Previously only relays that explicitly opened a directory port
  11279. (DirPort) accepted directory requests from clients. Now all
  11280. relays, with and without a DirPort, accept and serve tunneled
  11281. directory requests that they receive through their ORPort. You can
  11282. disable this behavior using the new DirCache option. Closes
  11283. ticket 12538.
  11284. o Major key updates:
  11285. - Update the V3 identity key for the dannenberg directory authority:
  11286. it was changed on 18 November 2015. Closes task 17906. Patch
  11287. by "teor".
  11288. o Minor features (security, clock):
  11289. - Warn when the system clock appears to move back in time (when the
  11290. state file was last written in the future). Tor doesn't know that
  11291. consensuses have expired if the clock is in the past. Patch by
  11292. "teor". Implements ticket 17188.
  11293. o Minor features (security, exit policies):
  11294. - ExitPolicyRejectPrivate now rejects more private addresses by
  11295. default. Specifically, it now rejects the relay's outbound bind
  11296. addresses (if configured), and the relay's configured port
  11297. addresses (such as ORPort and DirPort). Fixes bug 17027; bugfix on
  11298. 0.2.0.11-alpha. Patch by "teor".
  11299. o Minor features (security, memory erasure):
  11300. - Set the unused entries in a smartlist to NULL. This helped catch
  11301. a (harmless) bug, and shouldn't affect performance too much.
  11302. Implements ticket 17026.
  11303. - Use SecureMemoryWipe() function to securely clean memory on
  11304. Windows. Previously we'd use OpenSSL's OPENSSL_cleanse() function.
  11305. Implements feature 17986.
  11306. - Use explicit_bzero or memset_s when present. Previously, we'd use
  11307. OpenSSL's OPENSSL_cleanse() function. Closes ticket 7419; patches
  11308. from <logan@hackers.mu> and <selven@hackers.mu>.
  11309. - Make memwipe() do nothing when passed a NULL pointer or buffer of
  11310. zero size. Check size argument to memwipe() for underflow. Fixes
  11311. bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
  11312. patch by "teor".
  11313. o Minor features (security, RNG):
  11314. - Adjust Tor's use of OpenSSL's RNG APIs so that they absolutely,
  11315. positively are not allowed to fail. Previously we depended on
  11316. internal details of OpenSSL's behavior. Closes ticket 17686.
  11317. - Never use the system entropy output directly for anything besides
  11318. seeding the PRNG. When we want to generate important keys, instead
  11319. of using system entropy directly, we now hash it with the PRNG
  11320. stream. This may help resist certain attacks based on broken OS
  11321. entropy implementations. Closes part of ticket 17694.
  11322. - Use modern system calls (like getentropy() or getrandom()) to
  11323. generate strong entropy on platforms that have them. Closes
  11324. ticket 13696.
  11325. o Minor features (accounting):
  11326. - Added two modes to the AccountingRule option: One for limiting
  11327. only the number of bytes sent ("AccountingRule out"), and one for
  11328. limiting only the number of bytes received ("AccountingRule in").
  11329. Closes ticket 15989; patch from "unixninja92".
  11330. o Minor features (build):
  11331. - Since our build process now uses "make distcheck", we no longer
  11332. force "make dist" to depend on "make check". Closes ticket 17893;
  11333. patch from "cypherpunks."
  11334. - Tor now builds successfully with the recent OpenSSL 1.1
  11335. development branch, and with the latest LibreSSL. Closes tickets
  11336. 17549, 17921, and 17984.
  11337. o Minor features (controller):
  11338. - Adds the FallbackDir entries to 'GETINFO config/defaults'. Closes
  11339. tickets 16774 and 17817. Patch by George Tankersley.
  11340. - New 'GETINFO hs/service/desc/id/' command to retrieve a hidden
  11341. service descriptor from a service's local hidden service
  11342. descriptor cache. Closes ticket 14846.
  11343. - Add 'GETINFO exit-policy/reject-private/[default,relay]', so
  11344. controllers can examine the the reject rules added by
  11345. ExitPolicyRejectPrivate. This makes it easier for stem to display
  11346. exit policies.
  11347. o Minor features (crypto):
  11348. - Add SHA512 support to crypto.c. Closes ticket 17663; patch from
  11349. George Tankersley.
  11350. - Add SHA3 and SHAKE support to crypto.c. Closes ticket 17783.
  11351. - When allocating a digest state object, allocate no more space than
  11352. we actually need. Previously, we would allocate as much space as
  11353. the state for the largest algorithm would need. This change saves
  11354. up to 672 bytes per circuit. Closes ticket 17796.
  11355. - Improve performance when hashing non-multiple of 8 sized buffers,
  11356. based on Andrew Moon's public domain SipHash-2-4 implementation.
  11357. Fixes bug 17544; bugfix on 0.2.5.3-alpha.
  11358. o Minor features (directory downloads):
  11359. - Wait for busy authorities and fallback directories to become non-
  11360. busy when bootstrapping. (A similar change was made in 6c443e987d
  11361. for directory caches chosen from the consensus.) Closes ticket
  11362. 17864; patch by "teor".
  11363. - Add UseDefaultFallbackDirs, which enables any hard-coded fallback
  11364. directory mirrors. The default is 1; set it to 0 to disable
  11365. fallbacks. Implements ticket 17576. Patch by "teor".
  11366. o Minor features (geoip):
  11367. - Update geoip and geoip6 to the January 5 2016 Maxmind GeoLite2
  11368. Country database.
  11369. o Minor features (IPv6):
  11370. - Add an argument 'ipv6=address:orport' to the DirAuthority and
  11371. FallbackDir torrc options, to specify an IPv6 address for an
  11372. authority or fallback directory. Add hard-coded ipv6 addresses for
  11373. directory authorities that have them. Closes ticket 17327; patch
  11374. from Nick Mathewson and "teor".
  11375. - Add address policy assume_action support for IPv6 addresses.
  11376. - Limit IPv6 mask bits to 128.
  11377. - Warn when comparing against an AF_UNSPEC address in a policy, it's
  11378. almost always a bug. Closes ticket 17863; patch by "teor".
  11379. - Allow users to configure directory authorities and fallback
  11380. directory servers with IPv6 addresses and ORPorts. Resolves
  11381. ticket 6027.
  11382. - routerset_parse now accepts IPv6 literal addresses. Fixes bug
  11383. 17060; bugfix on 0.2.1.3-alpha. Patch by "teor".
  11384. - Make tor_ersatz_socketpair work on IPv6-only systems. Fixes bug
  11385. 17638; bugfix on 0.0.2pre8. Patch by "teor".
  11386. o Minor features (logging):
  11387. - When logging to syslog, allow a tag to be added to the syslog
  11388. identity (the string prepended to every log message). The tag can
  11389. be configured with SyslogIdentityTag and defaults to none. Setting
  11390. it to "foo" will cause logs to be tagged as "Tor-foo". Closes
  11391. ticket 17194.
  11392. o Minor features (portability):
  11393. - Use timingsafe_memcmp() where available. Closes ticket 17944;
  11394. patch from <logan@hackers.mu>.
  11395. o Minor features (relay, address discovery):
  11396. - Add a family argument to get_interface_addresses_raw() and
  11397. subfunctions to make network interface address interogation more
  11398. efficient. Now Tor can specifically ask for IPv4, IPv6 or both
  11399. types of interfaces from the operating system. Resolves
  11400. ticket 17950.
  11401. - When get_interface_address6_list(.,AF_UNSPEC,.) is called and
  11402. fails to enumerate interface addresses using the platform-specific
  11403. API, have it rely on the UDP socket fallback technique to try and
  11404. find out what IP addresses (both IPv4 and IPv6) our machine has.
  11405. Resolves ticket 17951.
  11406. o Minor features (replay cache):
  11407. - The replay cache now uses SHA256 instead of SHA1. Implements
  11408. feature 8961. Patch by "teor", issue reported by "rransom".
  11409. o Minor features (unix file permissions):
  11410. - Defer creation of Unix sockets until after setuid. This avoids
  11411. needing CAP_CHOWN and CAP_FOWNER when using systemd's
  11412. CapabilityBoundingSet, or chown and fowner when using SELinux.
  11413. Implements part of ticket 17562. Patch from Jamie Nguyen.
  11414. - If any directory created by Tor is marked as group readable, the
  11415. filesystem group is allowed to be either the default GID or the
  11416. root user. Allowing root to read the DataDirectory prevents the
  11417. need for CAP_READ_SEARCH when using systemd's
  11418. CapabilityBoundingSet, or dac_read_search when using SELinux.
  11419. Implements part of ticket 17562. Patch from Jamie Nguyen.
  11420. - Introduce a new DataDirectoryGroupReadable option. If it is set to
  11421. 1, the DataDirectory will be made readable by the default GID.
  11422. Implements part of ticket 17562. Patch from Jamie Nguyen.
  11423. o Minor bugfixes (accounting):
  11424. - The max bandwidth when using 'AccountRule sum' is now correctly
  11425. logged. Fixes bug 18024; bugfix on 0.2.6.1-alpha. Patch
  11426. from "unixninja92".
  11427. o Minor bugfixes (code correctness):
  11428. - When closing an entry connection, generate a warning if we should
  11429. have sent an end cell for it but we haven't. Fixes bug 17876;
  11430. bugfix on 0.2.3.2-alpha.
  11431. - Assert that allocated memory held by the reputation code is freed
  11432. according to its internal counters. Fixes bug 17753; bugfix
  11433. on 0.1.1.1-alpha.
  11434. - Assert when the TLS contexts fail to initialize. Fixes bug 17683;
  11435. bugfix on 0.0.6.
  11436. o Minor bugfixes (compilation):
  11437. - Mark all object files that include micro-revision.i as depending
  11438. on it, so as to make parallel builds more reliable. Fixes bug
  11439. 17826; bugfix on 0.2.5.1-alpha.
  11440. - Don't try to use the pthread_condattr_setclock() function unless
  11441. it actually exists. Fixes compilation on NetBSD-6.x. Fixes bug
  11442. 17819; bugfix on 0.2.6.3-alpha.
  11443. - Fix backtrace compilation on FreeBSD. Fixes bug 17827; bugfix
  11444. on 0.2.5.2-alpha.
  11445. - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
  11446. bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
  11447. - Fix search for libevent libraries on OpenBSD (and other systems
  11448. that install libevent 1 and libevent 2 in parallel). Fixes bug
  11449. 16651; bugfix on 0.1.0.7-rc. Patch from "rubiate".
  11450. - Isolate environment variables meant for tests from the rest of the
  11451. build system. Fixes bug 17818; bugfix on 0.2.7.3-rc.
  11452. - Replace usage of 'INLINE' with 'inline'. Fixes bug 17804; bugfix
  11453. on 0.0.2pre8.
  11454. - Remove config.log only from make distclean, not from make clean.
  11455. Fixes bug 17924; bugfix on 0.2.4.1-alpha.
  11456. o Minor bugfixes (crypto):
  11457. - Check the return value of HMAC() and assert on failure. Fixes bug
  11458. 17658; bugfix on 0.2.3.6-alpha. Patch by "teor".
  11459. o Minor bugfixes (fallback directories):
  11460. - Mark fallbacks as "too busy" when they return a 503 response,
  11461. rather than just marking authorities. Fixes bug 17572; bugfix on
  11462. 0.2.4.7-alpha. Patch by "teor".
  11463. o Minor bugfixes (IPv6):
  11464. - Update the limits in max_dl_per_request for IPv6 address length.
  11465. Fixes bug 17573; bugfix on 0.2.1.5-alpha.
  11466. o Minor bugfixes (linux seccomp2 sandbox):
  11467. - Fix a crash when using offline master ed25519 keys with the Linux
  11468. seccomp2 sandbox enabled. Fixes bug 17675; bugfix on 0.2.7.3-rc.
  11469. o Minor bugfixes (logging):
  11470. - In log messages that include a function name, use __FUNCTION__
  11471. instead of __PRETTY_FUNCTION__. In GCC, these are synonymous, but
  11472. with clang __PRETTY_FUNCTION__ has extra information we don't
  11473. need. Fixes bug 16563; bugfix on 0.0.2pre8. Fix by Tom van
  11474. der Woerdt.
  11475. - Remove needless quotes from a log message about unparseable
  11476. addresses. Fixes bug 17843; bugfix on 0.2.3.3-alpha.
  11477. o Minor bugfixes (portability):
  11478. - Remove an #endif from configure.ac so that we correctly detect the
  11479. presence of in6_addr.s6_addr32. Fixes bug 17923; bugfix
  11480. on 0.2.0.13-alpha.
  11481. o Minor bugfixes (relays):
  11482. - Check that both the ORPort and DirPort (if present) are reachable
  11483. before publishing a relay descriptor. Otherwise, relays publish a
  11484. descriptor with DirPort 0 when the DirPort reachability test takes
  11485. longer than the ORPort reachability test. Fixes bug 18050; bugfix
  11486. on 0.1.0.1-rc. Reported by "starlight", patch by "teor".
  11487. o Minor bugfixes (relays, hidden services):
  11488. - Refuse connection requests to private OR addresses unless
  11489. ExtendAllowPrivateAddresses is set. Previously, tor would connect,
  11490. then refuse to send any cells to a private address. Fixes bugs
  11491. 17674 and 8976; bugfix on 0.2.3.21-rc. Patch by "teor".
  11492. o Minor bugfixes (safe logging):
  11493. - When logging a malformed hostname received through socks4, scrub
  11494. it if SafeLogging says we should. Fixes bug 17419; bugfix
  11495. on 0.1.1.16-rc.
  11496. o Minor bugfixes (statistics code):
  11497. - Consistently check for overflow in round_*_to_next_multiple_of
  11498. functions, and add unit tests with additional and maximal values.
  11499. Fixes part of bug 13192; bugfix on 0.2.2.1-alpha.
  11500. - Handle edge cases in the laplace functions: avoid division by
  11501. zero, avoid taking the log of zero, and silence clang type
  11502. conversion warnings using round and trunc. Add unit tests for edge
  11503. cases with maximal values. Fixes part of bug 13192; bugfix
  11504. on 0.2.6.2-alpha.
  11505. o Minor bugfixes (testing):
  11506. - The test for log_heartbeat was incorrectly failing in timezones
  11507. with non-integer offsets. Instead of comparing the end of the time
  11508. string against a constant, compare it to the output of
  11509. format_local_iso_time when given the correct input. Fixes bug
  11510. 18039; bugfix on 0.2.5.4-alpha.
  11511. - Make unit tests pass on IPv6-only systems, and systems without
  11512. localhost addresses (like some FreeBSD jails). Fixes bug 17632;
  11513. bugfix on 0.2.7.3-rc. Patch by "teor".
  11514. - Fix a memory leak in the ntor test. Fixes bug 17778; bugfix
  11515. on 0.2.4.8-alpha.
  11516. - Check the full results of SHA256 and SHA512 digests in the unit
  11517. tests. Bugfix on 0.2.2.4-alpha. Patch by "teor".
  11518. o Code simplification and refactoring:
  11519. - Move logging of redundant policy entries in
  11520. policies_parse_exit_policy_internal into its own function. Closes
  11521. ticket 17608; patch from "juce".
  11522. - Extract the more complicated parts of circuit_mark_for_close()
  11523. into a new function that we run periodically before circuits are
  11524. freed. This change removes more than half of the functions
  11525. currently in the "blob". Closes ticket 17218.
  11526. - Clean up a little duplicated code in
  11527. crypto_expand_key_material_TAP(). Closes ticket 17587; patch
  11528. from "pfrankw".
  11529. - Decouple the list of streams waiting to be attached to circuits
  11530. from the overall connection list. This change makes it possible to
  11531. attach streams quickly while simplifying Tor's callgraph and
  11532. avoiding O(N) scans of the entire connection list. Closes
  11533. ticket 17590.
  11534. - When a direct directory request fails immediately on launch,
  11535. instead of relaunching that request from inside the code that
  11536. launches it, instead mark the connection for teardown. This change
  11537. simplifies Tor's callback and prevents the directory-request
  11538. launching code from invoking itself recursively. Closes
  11539. ticket 17589
  11540. - Remove code for configuring OpenSSL dynamic locks; OpenSSL doesn't
  11541. use them. Closes ticket 17926.
  11542. o Documentation:
  11543. - Add a description of the correct use of the '--keygen' command-
  11544. line option. Closes ticket 17583; based on text by 's7r'.
  11545. - Document the minimum HeartbeatPeriod value. Closes ticket 15638.
  11546. - Explain actual minima for BandwidthRate. Closes ticket 16382.
  11547. - Fix a minor formatting typo in the manpage. Closes ticket 17791.
  11548. - Mention torspec URL in the manpage and point the reader to it
  11549. whenever we mention a document that belongs in torspce. Fixes
  11550. issue 17392.
  11551. o Removed features:
  11552. - Remove client-side support for connecting to Tor relays running
  11553. versions of Tor before 0.2.3.6-alpha. These relays didn't support
  11554. the v3 TLS handshake protocol, and are no longer allowed on the
  11555. Tor network. Implements the client side of ticket 11150. Based on
  11556. patches by Tom van der Woerdt.
  11557. o Testing:
  11558. - Add unit tests to check for common RNG failure modes, such as
  11559. returning all zeroes, identical values, or incrementing values
  11560. (OpenSSL's rand_predictable feature). Patch by "teor".
  11561. - Log more information when the backtrace tests fail. Closes ticket
  11562. 17892. Patch from "cypherpunks."
  11563. - Always test both ed25519 backends, so that we can be sure that our
  11564. batch-open replacement code works. Part of ticket 16794.
  11565. - Cover dns_resolve_impl() in dns.c with unit tests. Implements a
  11566. portion of ticket 16831.
  11567. - More unit tests for compat_libevent.c, procmon.c, tortls.c,
  11568. util_format.c, directory.c, and options_validate.c. Closes tickets
  11569. 17075, 17082, 17084, 17003, and 17076 respectively. Patches from
  11570. Ola Bini.
  11571. - Unit tests for directory_handle_command_get. Closes ticket 17004.
  11572. Patch from Reinaldo de Souza Jr.
  11573. Changes in version 0.2.7.6 - 2015-12-10
  11574. Tor version 0.2.7.6 fixes a major bug in entry guard selection, as
  11575. well as a minor bug in hidden service reliability.
  11576. o Major bugfixes (guard selection):
  11577. - Actually look at the Guard flag when selecting a new directory
  11578. guard. When we implemented the directory guard design, we
  11579. accidentally started treating all relays as if they have the Guard
  11580. flag during guard selection, leading to weaker anonymity and worse
  11581. performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
  11582. by Mohsen Imani.
  11583. o Minor features (geoip):
  11584. - Update geoip and geoip6 to the December 1 2015 Maxmind GeoLite2
  11585. Country database.
  11586. o Minor bugfixes (compilation):
  11587. - When checking for net/pfvar.h, include netinet/in.h if possible.
  11588. This fixes transparent proxy detection on OpenBSD. Fixes bug
  11589. 17551; bugfix on 0.1.2.1-alpha. Patch from "rubiate".
  11590. - Fix a compilation warning with Clang 3.6: Do not check the
  11591. presence of an address which can never be NULL. Fixes bug 17781.
  11592. o Minor bugfixes (correctness):
  11593. - When displaying an IPv6 exit policy, include the mask bits
  11594. correctly even when the number is greater than 31. Fixes bug
  11595. 16056; bugfix on 0.2.4.7-alpha. Patch from "gturner".
  11596. - The wrong list was used when looking up expired intro points in a
  11597. rend service object, causing what we think could be reachability
  11598. issues for hidden services, and triggering a BUG log. Fixes bug
  11599. 16702; bugfix on 0.2.7.2-alpha.
  11600. - Fix undefined behavior in the tor_cert_checksig function. Fixes
  11601. bug 17722; bugfix on 0.2.7.2-alpha.
  11602. Changes in version 0.2.7.5 - 2015-11-20
  11603. The Tor 0.2.7 release series is dedicated to the memory of Tor user
  11604. and privacy advocate Caspar Bowden (1961-2015). Caspar worked
  11605. tirelessly to advocate human rights regardless of national borders,
  11606. and oppose the encroachments of mass surveillance. He opposed national
  11607. exceptionalism, he brought clarity to legal and policy debates, he
  11608. understood and predicted the impact of mass surveillance on the world,
  11609. and he laid the groundwork for resisting it. While serving on the Tor
  11610. Project's board of directors, he brought us his uncompromising focus
  11611. on technical excellence in the service of humankind. Caspar was an
  11612. inimitable force for good and a wonderful friend. He was kind,
  11613. humorous, generous, gallant, and believed we should protect one
  11614. another without exception. We honor him here for his ideals, his
  11615. efforts, and his accomplishments. Please honor his memory with works
  11616. that would make him proud.
  11617. Tor 0.2.7.5 is the first stable release in the Tor 0.2.7 series.
  11618. The 0.2.7 series adds a more secure identity key type for relays,
  11619. improves cryptography performance, resolves several longstanding
  11620. hidden-service performance issues, improves controller support for
  11621. hidden services, and includes small bugfixes and performance
  11622. improvements throughout the program. This release series also includes
  11623. more tests than before, and significant simplifications to which parts
  11624. of Tor invoke which others.
  11625. (This release contains no code changes since 0.2.7.4-rc.)
  11626. Changes in version 0.2.7.4-rc - 2015-10-21
  11627. Tor 0.2.7.4-rc is the second release candidate in the 0.2.7 series. It
  11628. fixes some important memory leaks, and a scary-looking (but mostly
  11629. harmless in practice) invalid-read bug. It also has a few small
  11630. bugfixes, notably fixes for compilation and portability on different
  11631. platforms. If no further significant bounds are found, the next
  11632. release will the the official stable release.
  11633. o Major bugfixes (security, correctness):
  11634. - Fix an error that could cause us to read 4 bytes before the
  11635. beginning of an openssl string. This bug could be used to cause
  11636. Tor to crash on systems with unusual malloc implementations, or
  11637. systems with unusual hardening installed. Fixes bug 17404; bugfix
  11638. on 0.2.3.6-alpha.
  11639. o Major bugfixes (correctness):
  11640. - Fix a use-after-free bug in validate_intro_point_failure(). Fixes
  11641. bug 17401; bugfix on 0.2.7.3-rc.
  11642. o Major bugfixes (memory leaks):
  11643. - Fix a memory leak in ed25519 batch signature checking. Fixes bug
  11644. 17398; bugfix on 0.2.6.1-alpha.
  11645. - Fix a memory leak in rend_cache_failure_entry_free(). Fixes bug
  11646. 17402; bugfix on 0.2.7.3-rc.
  11647. - Fix a memory leak when reading an expired signing key from disk.
  11648. Fixes bug 17403; bugfix on 0.2.7.2-rc.
  11649. o Minor features (geoIP):
  11650. - Update geoip and geoip6 to the October 9 2015 Maxmind GeoLite2
  11651. Country database.
  11652. o Minor bugfixes (compilation):
  11653. - Repair compilation with the most recent (unreleased, alpha)
  11654. vesions of OpenSSL 1.1. Fixes part of ticket 17237.
  11655. - Fix an integer overflow warning in test_crypto_slow.c. Fixes bug
  11656. 17251; bugfix on 0.2.7.2-alpha.
  11657. - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
  11658. bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
  11659. o Minor bugfixes (portability):
  11660. - Use libexecinfo on FreeBSD to enable backtrace support. Fixes
  11661. part of bug 17151; bugfix on 0.2.5.2-alpha. Patch from
  11662. Marcin Cieślak.
  11663. o Minor bugfixes (sandbox):
  11664. - Add the "hidserv-stats" filename to our sandbox filter for the
  11665. HiddenServiceStatistics option to work properly. Fixes bug 17354;
  11666. bugfix on 0.2.6.2-alpha. Patch from David Goulet.
  11667. o Minor bugfixes (testing):
  11668. - Add unit tests for get_interface_address* failure cases. Fixes bug
  11669. 17173; bugfix on 0.2.7.3-rc. Patch by fk/teor.
  11670. - Fix breakage when running 'make check' with BSD make. Fixes bug
  11671. 17154; bugfix on 0.2.7.3-rc. Patch by Marcin Cieślak.
  11672. - Make the get_ifaddrs_* unit tests more tolerant of different
  11673. network configurations. (Don't assume every test box has an IPv4
  11674. address, and don't assume every test box has a non-localhost
  11675. address.) Fixes bug 17255; bugfix on 0.2.7.3-rc. Patch by "teor".
  11676. - Skip backtrace tests when backtrace support is not compiled in.
  11677. Fixes part of bug 17151; bugfix on 0.2.7.1-alpha. Patch from
  11678. Marcin Cieślak.
  11679. o Documentation:
  11680. - Fix capitalization of SOCKS in sample torrc. Closes ticket 15609.
  11681. - Note that HiddenServicePorts can take a unix domain socket. Closes
  11682. ticket 17364.
  11683. Changes in version 0.2.7.3-rc - 2015-09-25
  11684. Tor 0.2.7.3-rc is the first release candidate in the 0.2.7 series. It
  11685. contains numerous usability fixes for Ed25519 keys, safeguards against
  11686. several misconfiguration problems, significant simplifications to
  11687. Tor's callgraph, and numerous bugfixes and small features.
  11688. This is the most tested release of Tor to date. The unit tests cover
  11689. 39.40% of the code, and the integration tests (accessible with "make
  11690. test-full-online", requiring stem and chutney and a network
  11691. connection) raise the coverage to 64.49%.
  11692. o Major features (security, hidden services):
  11693. - Hidden services, if using the EntryNodes option, are required to
  11694. use more than one EntryNode, in order to avoid a guard discovery
  11695. attack. (This would only affect people who had configured hidden
  11696. services and manually specified the EntryNodes option with a
  11697. single entry-node. The impact was that it would be easy to
  11698. remotely identify the guard node used by such a hidden service.
  11699. See ticket for more information.) Fixes ticket 14917.
  11700. o Major features (Ed25519 keys, keypinning):
  11701. - The key-pinning option on directory authorities is now advisory-
  11702. only by default. In a future version, or when the AuthDirPinKeys
  11703. option is set, pins are enforced again. Disabling key-pinning
  11704. seemed like a good idea so that we can survive the fallout of any
  11705. usability problems associated with Ed25519 keys. Closes
  11706. ticket 17135.
  11707. o Major features (Ed25519 performance):
  11708. - Improve the speed of Ed25519 operations and Curve25519 keypair
  11709. generation when built targeting 32 bit x86 platforms with SSE2
  11710. available. Implements ticket 16535.
  11711. - Improve the runtime speed of Ed25519 signature verification by
  11712. using Ed25519-donna's batch verification support. Implements
  11713. ticket 16533.
  11714. o Major features (performance testing):
  11715. - The test-network.sh script now supports performance testing.
  11716. Requires corresponding chutney performance testing changes. Patch
  11717. by "teor". Closes ticket 14175.
  11718. o Major features (relay, Ed25519):
  11719. - Significant usability improvements for Ed25519 key management. Log
  11720. messages are better, and the code can recover from far more
  11721. failure conditions. Thanks to "s7r" for reporting and diagnosing
  11722. so many of these!
  11723. - Add a new OfflineMasterKey option to tell Tor never to try loading
  11724. or generating a secret Ed25519 identity key. You can use this in
  11725. combination with tor --keygen to manage offline and/or encrypted
  11726. Ed25519 keys. Implements ticket 16944.
  11727. - Add a --newpass option to allow changing or removing the
  11728. passphrase of an encrypted key with tor --keygen. Implements part
  11729. of ticket 16769.
  11730. - On receiving a HUP signal, check to see whether the Ed25519
  11731. signing key has changed, and reload it if so. Closes ticket 16790.
  11732. o Major bugfixes (relay, Ed25519):
  11733. - Avoid crashing on 'tor --keygen'. Fixes bug 16679; bugfix on
  11734. 0.2.7.2-alpha. Reported by "s7r".
  11735. - Improve handling of expired signing keys with offline master keys.
  11736. Fixes bug 16685; bugfix on 0.2.7.2-alpha. Reported by "s7r".
  11737. o Minor features (client-side privacy):
  11738. - New KeepAliveIsolateSOCKSAuth option to indefinitely extend circuit
  11739. lifespan when IsolateSOCKSAuth and streams with SOCKS
  11740. authentication are attached to the circuit. This allows
  11741. applications like TorBrowser to manage circuit lifetime on their
  11742. own. Implements feature 15482.
  11743. - When logging malformed hostnames from SOCKS5 requests, respect
  11744. SafeLogging configuration. Fixes bug 16891; bugfix on 0.1.1.16-rc.
  11745. o Minor features (compilation):
  11746. - Give a warning as early as possible when trying to build with an
  11747. unsupported OpenSSL version. Closes ticket 16901.
  11748. - Fail during configure if we're trying to build against an OpenSSL
  11749. built without ECC support. Fixes bug 17109, bugfix on 0.2.7.1-alpha
  11750. which started requiring ECC.
  11751. o Minor features (geoip):
  11752. - Update geoip and geoip6 to the September 3 2015 Maxmind GeoLite2
  11753. Country database.
  11754. o Minor features (hidden services):
  11755. - Relays need to have the Fast flag to get the HSDir flag. As this
  11756. is being written, we'll go from 2745 HSDirs down to 2342, a ~14%
  11757. drop. This change should make some attacks against the hidden
  11758. service directory system harder. Fixes ticket 15963.
  11759. - Turn on hidden service statistics collection by setting the torrc
  11760. option HiddenServiceStatistics to "1" by default. (This keeps
  11761. track only of the fraction of traffic used by hidden services, and
  11762. the total number of hidden services in existence.) Closes
  11763. ticket 15254.
  11764. - Client now uses an introduction point failure cache to know when
  11765. to fetch or keep a descriptor in their cache. Previously, failures
  11766. were recorded implicitly, but not explicitly remembered. Closes
  11767. ticket 16389.
  11768. o Minor features (testing, authorities, documentation):
  11769. - New TestingDirAuthVote{Exit,Guard,HSDir}IsStrict flags to
  11770. explicitly manage consensus flags in testing networks. Patch by
  11771. "robgjansen", modified by "teor". Implements part of ticket 14882.
  11772. o Minor bugfixes (security, exit policies):
  11773. - ExitPolicyRejectPrivate now also rejects the relay's published
  11774. IPv6 address (if any), and any publicly routable IPv4 or IPv6
  11775. addresses on any local interfaces. ticket 17027. Patch by "teor".
  11776. Fixes bug 17027; bugfix on 0.2.0.11-alpha.
  11777. o Minor bug fixes (torrc exit policies):
  11778. - In torrc, "accept6 *" and "reject6 *" ExitPolicy lines now only
  11779. produce IPv6 wildcard addresses. Previously they would produce
  11780. both IPv4 and IPv6 wildcard addresses. Patch by "teor". Fixes part
  11781. of bug 16069; bugfix on 0.2.4.7-alpha.
  11782. - When parsing torrc ExitPolicies, we now warn for a number of cases
  11783. where the user's intent is likely to differ from Tor's actual
  11784. behavior. These include: using an IPv4 address with an accept6 or
  11785. reject6 line; using "private" on an accept6 or reject6 line; and
  11786. including any ExitPolicy lines after accept *:* or reject *:*.
  11787. Related to ticket 16069.
  11788. - When parsing torrc ExitPolicies, we now issue an info-level
  11789. message when expanding an "accept/reject *" line to include both
  11790. IPv4 and IPv6 wildcard addresses. Related to ticket 16069.
  11791. - In each instance above, usage advice is provided to avoid the
  11792. message. Resolves ticket 16069. Patch by "teor". Fixes part of bug
  11793. 16069; bugfix on 0.2.4.7-alpha.
  11794. o Minor bugfixes (authority):
  11795. - Don't assign "HSDir" to a router if it isn't Valid and Running.
  11796. Fixes bug 16524; bugfix on 0.2.7.2-alpha.
  11797. - Downgrade log messages about Ed25519 key issues if they are in old
  11798. cached router descriptors. Fixes part of bug 16286; bugfix
  11799. on 0.2.7.2-alpha.
  11800. - When we find an Ed25519 key issue in a cached descriptor, stop
  11801. saying the descriptor was just "uploaded". Fixes another part of
  11802. bug 16286; bugfix on 0.2.7.2-alpha.
  11803. o Minor bugfixes (control port):
  11804. - Repair a warning and a spurious result when getting the maximum
  11805. number of file descriptors from the controller. Fixes bug 16697;
  11806. bugfix on 0.2.7.2-alpha.
  11807. o Minor bugfixes (correctness):
  11808. - When calling channel_free_list(), avoid calling smartlist_remove()
  11809. while inside a FOREACH loop. This partially reverts commit
  11810. 17356fe7fd96af where the correct SMARTLIST_DEL_CURRENT was
  11811. incorrectly removed. Fixes bug 16924; bugfix on 0.2.4.4-alpha.
  11812. o Minor bugfixes (documentation):
  11813. - Advise users on how to configure separate IPv4 and IPv6 exit
  11814. policies in the manpage and sample torrcs. Related to ticket 16069.
  11815. - Fix the usage message of tor-resolve(1) so that it no longer lists
  11816. the removed -F option. Fixes bug 16913; bugfix on 0.2.2.28-beta.
  11817. - Fix an error in the manual page and comments for
  11818. TestingDirAuthVoteHSDir[IsStrict], which suggested that a HSDir
  11819. required "ORPort connectivity". While this is true, it is in no
  11820. way unique to the HSDir flag. Of all the flags, only HSDirs need a
  11821. DirPort configured in order for the authorities to assign that
  11822. particular flag. Patch by "teor". Fixed as part of 14882; bugfix
  11823. on 0.2.6.3-alpha.
  11824. o Minor bugfixes (Ed25519):
  11825. - Fix a memory leak when reading router descriptors with expired
  11826. Ed25519 certificates. Fixes bug 16539; bugfix on 0.2.7.2-alpha.
  11827. o Minor bugfixes (linux seccomp2 sandbox):
  11828. - Allow bridge authorities to run correctly under the seccomp2
  11829. sandbox. Fixes bug 16964; bugfix on 0.2.5.1-alpha.
  11830. - Allow routers with ed25519 keys to run correctly under the
  11831. seccomp2 sandbox. Fixes bug 16965; bugfix on 0.2.7.2-alpha.
  11832. o Minor bugfixes (open file limit):
  11833. - Fix set_max_file_descriptors() to set by default the max open file
  11834. limit to the current limit when setrlimit() fails. Fixes bug
  11835. 16274; bugfix on 0.2.0.10-alpha. Patch by dgoulet.
  11836. o Minor bugfixes (portability):
  11837. - Try harder to normalize the exit status of the Tor process to the
  11838. standard-provided range. Fixes bug 16975; bugfix on every version
  11839. of Tor ever.
  11840. - Check correctly for Windows socket errors in the workqueue
  11841. backend. Fixes bug 16741; bugfix on 0.2.6.3-alpha.
  11842. - Fix the behavior of crypto_rand_time_range() when told to consider
  11843. times before 1970. (These times were possible when running in a
  11844. simulated network environment where time()'s output starts at
  11845. zero.) Fixes bug 16980; bugfix on 0.2.7.1-alpha.
  11846. - Restore correct operation of TLS client-cipher detection on
  11847. OpenSSL 1.1. Fixes bug 14047; bugfix on 0.2.7.2-alpha.
  11848. o Minor bugfixes (relay):
  11849. - Ensure that worker threads actually exit when a fatal error or
  11850. shutdown is indicated. This fix doesn't currently affect the
  11851. behavior of Tor, because Tor workers never indicates fatal error
  11852. or shutdown except in the unit tests. Fixes bug 16868; bugfix
  11853. on 0.2.6.3-alpha.
  11854. - Unblock threads before releasing the work queue mutex to ensure
  11855. predictable scheduling behavior. Fixes bug 16644; bugfix
  11856. on 0.2.6.3-alpha.
  11857. o Code simplification and refactoring:
  11858. - Change the function that's called when we need to retry all
  11859. downloads so that it only reschedules the downloads to happen
  11860. immediately, rather than launching them all at once itself. This
  11861. further simplifies Tor's callgraph.
  11862. - Move some format-parsing functions out of crypto.c and
  11863. crypto_curve25519.c into crypto_format.c and/or util_format.c.
  11864. - Move the client-only parts of init_keys() into a separate
  11865. function. Closes ticket 16763.
  11866. - Simplify the microdesc_free() implementation so that it no longer
  11867. appears (to code analysis tools) to potentially invoke a huge
  11868. suite of other microdesc functions.
  11869. - Simply the control graph further by deferring the inner body of
  11870. directory_all_unreachable() into a callback. Closes ticket 16762.
  11871. - Treat the loss of an owning controller as equivalent to a SIGTERM
  11872. signal. This removes a tiny amount of duplicated code, and
  11873. simplifies our callgraph. Closes ticket 16788.
  11874. - When generating an event to send to the controller, we no longer
  11875. put the event over the network immediately. Instead, we queue
  11876. these events, and use a Libevent callback to deliver them. This
  11877. change simplifies Tor's callgraph by reducing the number of
  11878. functions from which all other Tor functions are reachable. Closes
  11879. ticket 16695.
  11880. - Wrap Windows-only C files inside '#ifdef _WIN32' so that tools
  11881. that try to scan or compile every file on Unix won't decide that
  11882. they are broken.
  11883. - Remove the unused "nulterminate" argument from buf_pullup().
  11884. o Documentation:
  11885. - Recommend a 40 GB example AccountingMax in torrc.sample rather
  11886. than a 4 GB max. Closes ticket 16742.
  11887. - Include the TUNING document in our source tarball. It is referred
  11888. to in the ChangeLog and an error message. Fixes bug 16929; bugfix
  11889. on 0.2.6.1-alpha.
  11890. o Removed code:
  11891. - The internal pure-C tor-fw-helper tool is now removed from the Tor
  11892. distribution, in favor of the pure-Go clone available from
  11893. https://gitweb.torproject.org/tor-fw-helper.git/ . The libraries
  11894. used by the C tor-fw-helper are not, in our opinion, very
  11895. confidence- inspiring in their secure-programming techniques.
  11896. Closes ticket 13338.
  11897. - Remove the code that would try to aggressively flush controller
  11898. connections while writing to them. This code was introduced in
  11899. 0.1.2.7-alpha, in order to keep output buffers from exceeding
  11900. their limits. But there is no longer a maximum output buffer size,
  11901. and flushing data in this way caused some undesirable recursions
  11902. in our call graph. Closes ticket 16480.
  11903. o Testing:
  11904. - Make "bridges+hs" the default test network. This tests almost all
  11905. tor functionality during make test-network, while allowing tests
  11906. to succeed on non-IPv6 systems. Requires chutney commit 396da92 in
  11907. test-network-bridges-hs. Closes tickets 16945 (tor) and 16946
  11908. (chutney). Patches by "teor".
  11909. - Autodetect CHUTNEY_PATH if the chutney and Tor sources are side-
  11910. by-side in the same parent directory. Closes ticket 16903. Patch
  11911. by "teor".
  11912. - Use environment variables rather than autoconf substitutions to
  11913. send variables from the build system to the test scripts. This
  11914. change should be easier to maintain, and cause 'make distcheck' to
  11915. work better than before. Fixes bug 17148.
  11916. - Add a new set of callgraph analysis scripts that use clang to
  11917. produce a list of which Tor functions are reachable from which
  11918. other Tor functions. We're planning to use these to help simplify
  11919. our code structure by identifying illogical dependencies.
  11920. - Add new 'test-full' and 'test-full-online' targets to run all
  11921. tests, including integration tests with stem and chutney.
  11922. - Make the test-workqueue test work on Windows by initializing the
  11923. network before we begin.
  11924. - New make target (make test-network-all) to run multiple applicable
  11925. chutney test cases. Patch from Teor; closes 16953.
  11926. - Unit test dns_resolve(), dns_clip_ttl() and dns_get_expiry_ttl()
  11927. functions in dns.c. Implements a portion of ticket 16831.
  11928. - When building Tor with testing coverage enabled, run Chutney tests
  11929. (if any) using the 'tor-cov' coverage binary.
  11930. - When running test-network or test-stem, check for the absence of
  11931. stem/chutney before doing any build operations.
  11932. Changes in version 0.2.7.2-alpha - 2015-07-27
  11933. This, the second alpha in the Tor 0.2.7 series, has a number of new
  11934. features, including a way to manually pick the number of introduction
  11935. points for hidden services, and the much stronger Ed25519 signing key
  11936. algorithm for regular Tor relays (including support for encrypted
  11937. offline identity keys in the new algorithm).
  11938. Support for Ed25519 on relays is currently limited to signing router
  11939. descriptors; later alphas in this series will extend Ed25519 key
  11940. support to more parts of the Tor protocol.
  11941. o Major features (Ed25519 identity keys, Proposal 220):
  11942. - All relays now maintain a stronger identity key, using the Ed25519
  11943. elliptic curve signature format. This master key is designed so
  11944. that it can be kept offline. Relays also generate an online
  11945. signing key, and a set of other Ed25519 keys and certificates.
  11946. These are all automatically regenerated and rotated as needed.
  11947. Implements part of ticket 12498.
  11948. - Directory authorities now vote on Ed25519 identity keys along with
  11949. RSA1024 keys. Implements part of ticket 12498.
  11950. - Directory authorities track which Ed25519 identity keys have been
  11951. used with which RSA1024 identity keys, and do not allow them to
  11952. vary freely. Implements part of ticket 12498.
  11953. - Microdescriptors now include Ed25519 identity keys. Implements
  11954. part of ticket 12498.
  11955. - Add support for offline encrypted Ed25519 master keys. To use this
  11956. feature on your tor relay, run "tor --keygen" to make a new master
  11957. key (or to make a new signing key if you already have a master
  11958. key). Closes ticket 13642.
  11959. o Major features (Hidden services):
  11960. - Add the torrc option HiddenServiceNumIntroductionPoints, to
  11961. specify a fixed number of introduction points. Its maximum value
  11962. is 10 and default is 3. Using this option can increase a hidden
  11963. service's reliability under load, at the cost of making it more
  11964. visible that the hidden service is facing extra load. Closes
  11965. ticket 4862.
  11966. - Remove the adaptive algorithm for choosing the number of
  11967. introduction points, which used to change the number of
  11968. introduction points (poorly) depending on the number of
  11969. connections the HS sees. Closes ticket 4862.
  11970. o Major features (onion key cross-certification):
  11971. - Relay descriptors now include signatures of their own identity
  11972. keys, made using the TAP and ntor onion keys. These signatures
  11973. allow relays to prove ownership of their own onion keys. Because
  11974. of this change, microdescriptors will no longer need to include
  11975. RSA identity keys. Implements proposal 228; closes ticket 12499.
  11976. o Major features (performance):
  11977. - Improve the runtime speed of Ed25519 operations by using the
  11978. public-domain Ed25519-donna by Andrew M. ("floodyberry").
  11979. Implements ticket 16467.
  11980. - Improve the runtime speed of the ntor handshake by using an
  11981. optimized curve25519 basepoint scalarmult implementation from the
  11982. public-domain Ed25519-donna by Andrew M. ("floodyberry"), based on
  11983. ideas by Adam Langley. Implements ticket 9663.
  11984. o Major bugfixes (client-side privacy, also in 0.2.6.9):
  11985. - Properly separate out each SOCKSPort when applying stream
  11986. isolation. The error occurred because each port's session group
  11987. was being overwritten by a default value when the listener
  11988. connection was initialized. Fixes bug 16247; bugfix on
  11989. 0.2.6.3-alpha. Patch by "jojelino".
  11990. o Major bugfixes (hidden service clients, stability, also in 0.2.6.10):
  11991. - Stop refusing to store updated hidden service descriptors on a
  11992. client. This reverts commit 9407040c59218 (which indeed fixed bug
  11993. 14219, but introduced a major hidden service reachability
  11994. regression detailed in bug 16381). This is a temporary fix since
  11995. we can live with the minor issue in bug 14219 (it just results in
  11996. some load on the network) but the regression of 16381 is too much
  11997. of a setback. First-round fix for bug 16381; bugfix
  11998. on 0.2.6.3-alpha.
  11999. o Major bugfixes (hidden services):
  12000. - When cannibalizing a circuit for an introduction point, always
  12001. extend to the chosen exit node (creating a 4 hop circuit).
  12002. Previously Tor would use the current circuit exit node, which
  12003. changed the original choice of introduction point, and could cause
  12004. the hidden service to skip excluded introduction points or
  12005. reconnect to a skipped introduction point. Fixes bug 16260; bugfix
  12006. on 0.1.0.1-rc.
  12007. o Major bugfixes (open file limit):
  12008. - The open file limit wasn't checked before calling
  12009. tor_accept_socket_nonblocking(), which would make Tor exceed the
  12010. limit. Now, before opening a new socket, Tor validates the open
  12011. file limit just before, and if the max has been reached, return an
  12012. error. Fixes bug 16288; bugfix on 0.1.1.1-alpha.
  12013. o Major bugfixes (stability, also in 0.2.6.10):
  12014. - Stop crashing with an assertion failure when parsing certain kinds
  12015. of malformed or truncated microdescriptors. Fixes bug 16400;
  12016. bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
  12017. by "cypherpunks_backup".
  12018. - Stop random client-side assertion failures that could occur when
  12019. connecting to a busy hidden service, or connecting to a hidden
  12020. service while a NEWNYM is in progress. Fixes bug 16013; bugfix
  12021. on 0.1.0.1-rc.
  12022. o Minor features (directory authorities, security, also in 0.2.6.9):
  12023. - The HSDir flag given by authorities now requires the Stable flag.
  12024. For the current network, this results in going from 2887 to 2806
  12025. HSDirs. Also, it makes it harder for an attacker to launch a sybil
  12026. attack by raising the effort for a relay to become Stable to
  12027. require at the very least 7 days, while maintaining the 96 hours
  12028. uptime requirement for HSDir. Implements ticket 8243.
  12029. o Minor features (client):
  12030. - Relax the validation of hostnames in SOCKS5 requests, allowing the
  12031. character '_' to appear, in order to cope with domains observed in
  12032. the wild that are serving non-RFC compliant records. Resolves
  12033. ticket 16430.
  12034. - Relax the validation done to hostnames in SOCKS5 requests, and
  12035. allow a single trailing '.' to cope with clients that pass FQDNs
  12036. using that syntax to explicitly indicate that the domain name is
  12037. fully-qualified. Fixes bug 16674; bugfix on 0.2.6.2-alpha.
  12038. - Add GroupWritable and WorldWritable options to unix-socket based
  12039. SocksPort and ControlPort options. These options apply to a single
  12040. socket, and override {Control,Socks}SocketsGroupWritable. Closes
  12041. ticket 15220.
  12042. o Minor features (control protocol):
  12043. - Support network-liveness GETINFO key and NETWORK_LIVENESS event in
  12044. the control protocol. Resolves ticket 15358.
  12045. o Minor features (directory authorities):
  12046. - Directory authorities no longer vote against the "Fast", "Stable",
  12047. and "HSDir" flags just because they were going to vote against
  12048. "Running": if the consensus turns out to be that the router was
  12049. running, then the authority's vote should count. Patch from Peter
  12050. Retzlaff; closes issue 8712.
  12051. o Minor features (geoip, also in 0.2.6.10):
  12052. - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
  12053. - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
  12054. o Minor features (hidden services):
  12055. - Add the new options "HiddenServiceMaxStreams" and
  12056. "HiddenServiceMaxStreamsCloseCircuit" to allow hidden services to
  12057. limit the maximum number of simultaneous streams per circuit, and
  12058. optionally tear down the circuit when the limit is exceeded. Part
  12059. of ticket 16052.
  12060. o Minor features (portability):
  12061. - Use C99 variadic macros when the compiler is not GCC. This avoids
  12062. failing compilations on MSVC, and fixes a log-file-based race
  12063. condition in our old workarounds. Original patch from Gisle Vanem.
  12064. o Minor bugfixes (compilation, also in 0.2.6.9):
  12065. - Build with --enable-systemd correctly when libsystemd is
  12066. installed, but systemd is not. Fixes bug 16164; bugfix on
  12067. 0.2.6.3-alpha. Patch from Peter Palfrader.
  12068. o Minor bugfixes (controller):
  12069. - Add the descriptor ID in each HS_DESC control event. It was
  12070. missing, but specified in control-spec.txt. Fixes bug 15881;
  12071. bugfix on 0.2.5.2-alpha.
  12072. o Minor bugfixes (crypto error-handling, also in 0.2.6.10):
  12073. - Check for failures from crypto_early_init, and refuse to continue.
  12074. A previous typo meant that we could keep going with an
  12075. uninitialized crypto library, and would have OpenSSL initialize
  12076. its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
  12077. when implementing ticket 4900. Patch by "teor".
  12078. o Minor bugfixes (hidden services):
  12079. - Fix a crash when reloading configuration while at least one
  12080. configured and one ephemeral hidden service exists. Fixes bug
  12081. 16060; bugfix on 0.2.7.1-alpha.
  12082. - Avoid crashing with a double-free bug when we create an ephemeral
  12083. hidden service but adding it fails for some reason. Fixes bug
  12084. 16228; bugfix on 0.2.7.1-alpha.
  12085. o Minor bugfixes (Linux seccomp2 sandbox):
  12086. - Use the sandbox in tor_open_cloexec whether or not O_CLOEXEC is
  12087. defined. Patch by "teor". Fixes bug 16515; bugfix on 0.2.3.1-alpha.
  12088. o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.10):
  12089. - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
  12090. these when eventfd2() support is missing. Fixes bug 16363; bugfix
  12091. on 0.2.6.3-alpha. Patch from "teor".
  12092. o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.9):
  12093. - Fix sandboxing to work when running as a relay, by allowing the
  12094. renaming of secret_id_key, and allowing the eventfd2 and futex
  12095. syscalls. Fixes bug 16244; bugfix on 0.2.6.1-alpha. Patch by
  12096. Peter Palfrader.
  12097. - Allow systemd connections to work with the Linux seccomp2 sandbox
  12098. code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
  12099. Peter Palfrader.
  12100. o Minor bugfixes (relay):
  12101. - Fix a rarely-encountered memory leak when failing to initialize
  12102. the thread pool. Fixes bug 16631; bugfix on 0.2.6.3-alpha. Patch
  12103. from "cypherpunks".
  12104. o Minor bugfixes (systemd):
  12105. - Fix an accidental formatting error that broke the systemd
  12106. configuration file. Fixes bug 16152; bugfix on 0.2.7.1-alpha.
  12107. - Tor's systemd unit file no longer contains extraneous spaces.
  12108. These spaces would sometimes confuse tools like deb-systemd-
  12109. helper. Fixes bug 16162; bugfix on 0.2.5.5-alpha.
  12110. o Minor bugfixes (tests):
  12111. - Use the configured Python executable when running test-stem-full.
  12112. Fixes bug 16470; bugfix on 0.2.7.1-alpha.
  12113. o Minor bugfixes (tests, also in 0.2.6.9):
  12114. - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
  12115. 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
  12116. o Minor bugfixes (threads, comments):
  12117. - Always initialize return value in compute_desc_id in rendcommon.c
  12118. Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
  12119. - Check for NULL values in getinfo_helper_onions(). Patch by "teor".
  12120. Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
  12121. - Remove undefined directive-in-macro in test_util_writepid clang
  12122. 3.7 complains that using a preprocessor directive inside a macro
  12123. invocation in test_util_writepid in test_util.c is undefined.
  12124. Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
  12125. o Code simplification and refactoring:
  12126. - Define WINVER and _WIN32_WINNT centrally, in orconfig.h, in order
  12127. to ensure they remain consistent and visible everywhere.
  12128. - Remove some vestigial workarounds for the MSVC6 compiler. We
  12129. haven't supported that in ages.
  12130. - The link authentication code has been refactored for better
  12131. testability and reliability. It now uses code generated with the
  12132. "trunnel" binary encoding generator, to reduce the risk of bugs
  12133. due to programmer error. Done as part of ticket 12498.
  12134. o Documentation:
  12135. - Include a specific and (hopefully) accurate documentation of the
  12136. torrc file's meta-format in doc/torrc_format.txt. This is mainly
  12137. of interest to people writing programs to parse or generate torrc
  12138. files. This document is not a commitment to long-term
  12139. compatibility; some aspects of the current format are a bit
  12140. ridiculous. Closes ticket 2325.
  12141. o Removed features:
  12142. - Tor no longer supports copies of OpenSSL that are missing support
  12143. for Elliptic Curve Cryptography. (We began using ECC when
  12144. available in 0.2.4.8-alpha, for more safe and efficient key
  12145. negotiation.) In particular, support for at least one of P256 or
  12146. P224 is now required, with manual configuration needed if only
  12147. P224 is available. Resolves ticket 16140.
  12148. - Tor no longer supports versions of OpenSSL before 1.0. (If you are
  12149. on an operating system that has not upgraded to OpenSSL 1.0 or
  12150. later, and you compile Tor from source, you will need to install a
  12151. more recent OpenSSL to link Tor against.) These versions of
  12152. OpenSSL are still supported by the OpenSSL, but the numerous
  12153. cryptographic improvements in later OpenSSL releases makes them a
  12154. clear choice. Resolves ticket 16034.
  12155. - Remove the HidServDirectoryV2 option. Now all relays offer to
  12156. store hidden service descriptors. Related to 16543.
  12157. - Remove the VoteOnHidServDirectoriesV2 option, since all
  12158. authorities have long set it to 1. Closes ticket 16543.
  12159. o Testing:
  12160. - Document use of coverity, clang static analyzer, and clang dynamic
  12161. undefined behavior and address sanitizers in doc/HACKING. Include
  12162. detailed usage instructions in the blacklist. Patch by "teor".
  12163. Closes ticket 15817.
  12164. - The link authentication protocol code now has extensive tests.
  12165. - The relay descriptor signature testing code now has
  12166. extensive tests.
  12167. - The test_workqueue program now runs faster, and is enabled by
  12168. default as a part of "make check".
  12169. - Now that OpenSSL has its own scrypt implementation, add an unit
  12170. test that checks for interoperability between libscrypt_scrypt()
  12171. and OpenSSL's EVP_PBE_scrypt() so that we could not use libscrypt
  12172. and rely on EVP_PBE_scrypt() whenever possible. Resolves
  12173. ticket 16189.
  12174. Changes in version 0.2.6.10 - 2015-07-12
  12175. Tor version 0.2.6.10 fixes some significant stability and hidden
  12176. service client bugs, bulletproofs the cryptography init process, and
  12177. fixes a bug when using the sandbox code with some older versions of
  12178. Linux. Everyone running an older version, especially an older version
  12179. of 0.2.6, should upgrade.
  12180. o Major bugfixes (hidden service clients, stability):
  12181. - Stop refusing to store updated hidden service descriptors on a
  12182. client. This reverts commit 9407040c59218 (which indeed fixed bug
  12183. 14219, but introduced a major hidden service reachability
  12184. regression detailed in bug 16381). This is a temporary fix since
  12185. we can live with the minor issue in bug 14219 (it just results in
  12186. some load on the network) but the regression of 16381 is too much
  12187. of a setback. First-round fix for bug 16381; bugfix
  12188. on 0.2.6.3-alpha.
  12189. o Major bugfixes (stability):
  12190. - Stop crashing with an assertion failure when parsing certain kinds
  12191. of malformed or truncated microdescriptors. Fixes bug 16400;
  12192. bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
  12193. by "cypherpunks_backup".
  12194. - Stop random client-side assertion failures that could occur when
  12195. connecting to a busy hidden service, or connecting to a hidden
  12196. service while a NEWNYM is in progress. Fixes bug 16013; bugfix
  12197. on 0.1.0.1-rc.
  12198. o Minor features (geoip):
  12199. - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
  12200. - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
  12201. o Minor bugfixes (crypto error-handling):
  12202. - Check for failures from crypto_early_init, and refuse to continue.
  12203. A previous typo meant that we could keep going with an
  12204. uninitialized crypto library, and would have OpenSSL initialize
  12205. its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
  12206. when implementing ticket 4900. Patch by "teor".
  12207. o Minor bugfixes (Linux seccomp2 sandbox):
  12208. - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
  12209. these when eventfd2() support is missing. Fixes bug 16363; bugfix
  12210. on 0.2.6.3-alpha. Patch from "teor".
  12211. Changes in version 0.2.6.9 - 2015-06-11
  12212. Tor 0.2.6.9 fixes a regression in the circuit isolation code, increases the
  12213. requirements for receiving an HSDir flag, and addresses some other small
  12214. bugs in the systemd and sandbox code. Clients using circuit isolation
  12215. should upgrade; all directory authorities should upgrade.
  12216. o Major bugfixes (client-side privacy):
  12217. - Properly separate out each SOCKSPort when applying stream
  12218. isolation. The error occurred because each port's session group was
  12219. being overwritten by a default value when the listener connection
  12220. was initialized. Fixes bug 16247; bugfix on 0.2.6.3-alpha. Patch
  12221. by "jojelino".
  12222. o Minor feature (directory authorities, security):
  12223. - The HSDir flag given by authorities now requires the Stable flag.
  12224. For the current network, this results in going from 2887 to 2806
  12225. HSDirs. Also, it makes it harder for an attacker to launch a sybil
  12226. attack by raising the effort for a relay to become Stable which
  12227. takes at the very least 7 days to do so and by keeping the 96
  12228. hours uptime requirement for HSDir. Implements ticket 8243.
  12229. o Minor bugfixes (compilation):
  12230. - Build with --enable-systemd correctly when libsystemd is
  12231. installed, but systemd is not. Fixes bug 16164; bugfix on
  12232. 0.2.6.3-alpha. Patch from Peter Palfrader.
  12233. o Minor bugfixes (Linux seccomp2 sandbox):
  12234. - Fix sandboxing to work when running as a relaymby renaming of
  12235. secret_id_key, and allowing the eventfd2 and futex syscalls. Fixes
  12236. bug 16244; bugfix on 0.2.6.1-alpha. Patch by Peter Palfrader.
  12237. - Allow systemd connections to work with the Linux seccomp2 sandbox
  12238. code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
  12239. Peter Palfrader.
  12240. o Minor bugfixes (tests):
  12241. - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
  12242. 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
  12243. Changes in version 0.2.6.8 - 2015-05-21
  12244. Tor 0.2.6.8 fixes a bit of dodgy code in parsing INTRODUCE2 cells, and
  12245. fixes an authority-side bug in assigning the HSDir flag. All directory
  12246. authorities should upgrade.
  12247. o Major bugfixes (hidden services, backport from 0.2.7.1-alpha):
  12248. - Revert commit that made directory authorities assign the HSDir
  12249. flag to relays without a DirPort; this was bad because such relays
  12250. can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
  12251. on 0.2.6.3-alpha.
  12252. o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
  12253. - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
  12254. a client authorized hidden service. Fixes bug 15823; bugfix
  12255. on 0.2.1.6-alpha.
  12256. o Minor features (geoip):
  12257. - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
  12258. - Update geoip6 to the April 8 2015 Maxmind GeoLite2
  12259. Country database.
  12260. Changes in version 0.2.7.1-alpha - 2015-05-12
  12261. Tor 0.2.7.1-alpha is the first alpha release in its series. It
  12262. includes numerous small features and bugfixes against previous Tor
  12263. versions, and numerous small infrastructure improvements. The most
  12264. notable features are several new ways for controllers to interact with
  12265. the hidden services subsystem.
  12266. o New system requirements:
  12267. - Tor no longer includes workarounds to support Libevent versions
  12268. before 1.3e. Libevent 2.0 or later is recommended. Closes
  12269. ticket 15248.
  12270. o Major features (controller):
  12271. - Add the ADD_ONION and DEL_ONION commands that allow the creation
  12272. and management of hidden services via the controller. Closes
  12273. ticket 6411.
  12274. - New "GETINFO onions/current" and "GETINFO onions/detached"
  12275. commands to get information about hidden services created via the
  12276. controller. Part of ticket 6411.
  12277. - New HSFETCH command to launch a request for a hidden service
  12278. descriptor. Closes ticket 14847.
  12279. - New HSPOST command to upload a hidden service descriptor. Closes
  12280. ticket 3523. Patch by "DonnchaC".
  12281. o Major bugfixes (hidden services):
  12282. - Revert commit that made directory authorities assign the HSDir
  12283. flag to relays without a DirPort; this was bad because such relays
  12284. can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
  12285. on 0.2.6.3-alpha.
  12286. o Minor features (clock-jump tolerance):
  12287. - Recover better when our clock jumps back many hours, like might
  12288. happen for Tails or Whonix users who start with a very wrong
  12289. hardware clock, use Tor to discover a more accurate time, and then
  12290. fix their clock. Resolves part of ticket 8766.
  12291. o Minor features (command-line interface):
  12292. - Make --hash-password imply --hush to prevent unnecessary noise.
  12293. Closes ticket 15542. Patch from "cypherpunks".
  12294. - Print a warning whenever we find a relative file path being used
  12295. as torrc option. Resolves issue 14018.
  12296. o Minor features (controller):
  12297. - Add DirAuthority lines for default directory authorities to the
  12298. output of the "GETINFO config/defaults" command if not already
  12299. present. Implements ticket 14840.
  12300. - Controllers can now use "GETINFO hs/client/desc/id/..." to
  12301. retrieve items from the client's hidden service descriptor cache.
  12302. Closes ticket 14845.
  12303. - Implement a new controller command "GETINFO status/fresh-relay-
  12304. descs" to fetch a descriptor/extrainfo pair that was generated on
  12305. demand just for the controller's use. Implements ticket 14784.
  12306. o Minor features (DoS-resistance):
  12307. - Make it harder for attackers to overload hidden services with
  12308. introductions, by blocking multiple introduction requests on the
  12309. same circuit. Resolves ticket 15515.
  12310. o Minor features (geoip):
  12311. - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
  12312. - Update geoip6 to the April 8 2015 Maxmind GeoLite2
  12313. Country database.
  12314. o Minor features (HS popularity countermeasure):
  12315. - To avoid leaking HS popularity, don't cycle the introduction point
  12316. when we've handled a fixed number of INTRODUCE2 cells but instead
  12317. cycle it when a random number of introductions is reached, thus
  12318. making it more difficult for an attacker to find out the amount of
  12319. clients that have used the introduction point for a specific HS.
  12320. Closes ticket 15745.
  12321. o Minor features (logging):
  12322. - Include the Tor version in all LD_BUG log messages, since people
  12323. tend to cut and paste those into the bugtracker. Implements
  12324. ticket 15026.
  12325. o Minor features (pluggable transports):
  12326. - When launching managed pluggable transports on Linux systems,
  12327. attempt to have the kernel deliver a SIGTERM on tor exit if the
  12328. pluggable transport process is still running. Resolves
  12329. ticket 15471.
  12330. - When launching managed pluggable transports, setup a valid open
  12331. stdin in the child process that can be used to detect if tor has
  12332. terminated. The "TOR_PT_EXIT_ON_STDIN_CLOSE" environment variable
  12333. can be used by implementations to detect this new behavior.
  12334. Resolves ticket 15435.
  12335. o Minor features (testing):
  12336. - Add a test to verify that the compiler does not eliminate our
  12337. memwipe() implementation. Closes ticket 15377.
  12338. - Add make rule `check-changes` to verify the format of changes
  12339. files. Closes ticket 15180.
  12340. - Add unit tests for control_event_is_interesting(). Add a compile-
  12341. time check that the number of events doesn't exceed the capacity
  12342. of control_event_t.event_mask. Closes ticket 15431, checks for
  12343. bugs similar to 13085. Patch by "teor".
  12344. - Command-line argument tests moved to Stem. Resolves ticket 14806.
  12345. - Integrate the ntor, backtrace, and zero-length keys tests into the
  12346. automake test suite. Closes ticket 15344.
  12347. - Remove assertions during builds to determine Tor's test coverage.
  12348. We don't want to trigger these even in assertions, so including
  12349. them artificially makes our branch coverage look worse than it is.
  12350. This patch provides the new test-stem-full and coverage-html-full
  12351. configure options. Implements ticket 15400.
  12352. o Minor bugfixes (build):
  12353. - Improve out-of-tree builds by making non-standard rules work and
  12354. clean up additional files and directories. Fixes bug 15053; bugfix
  12355. on 0.2.7.0-alpha.
  12356. o Minor bugfixes (command-line interface):
  12357. - When "--quiet" is provided along with "--validate-config", do not
  12358. write anything to stdout on success. Fixes bug 14994; bugfix
  12359. on 0.2.3.3-alpha.
  12360. - When complaining about bad arguments to "--dump-config", use
  12361. stderr, not stdout.
  12362. o Minor bugfixes (configuration, unit tests):
  12363. - Only add the default fallback directories when the DirAuthorities,
  12364. AlternateDirAuthority, and FallbackDir directory config options
  12365. are set to their defaults. The default fallback directory list is
  12366. currently empty, this fix will only change tor's behavior when it
  12367. has default fallback directories. Includes unit tests for
  12368. consider_adding_dir_servers(). Fixes bug 15642; bugfix on
  12369. 90f6071d8dc0 in 0.2.4.7-alpha. Patch by "teor".
  12370. o Minor bugfixes (correctness):
  12371. - For correctness, avoid modifying a constant string in
  12372. handle_control_postdescriptor. Fixes bug 15546; bugfix
  12373. on 0.1.1.16-rc.
  12374. - Remove side-effects from tor_assert() calls. This was harmless,
  12375. because we never disable assertions, but it is bad style and
  12376. unnecessary. Fixes bug 15211; bugfix on 0.2.5.5, 0.2.2.36,
  12377. and 0.2.0.10.
  12378. o Minor bugfixes (hidden service):
  12379. - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
  12380. a client authorized hidden service. Fixes bug 15823; bugfix
  12381. on 0.2.1.6-alpha.
  12382. - Remove an extraneous newline character from the end of hidden
  12383. service descriptors. Fixes bug 15296; bugfix on 0.2.0.10-alpha.
  12384. o Minor bugfixes (interface):
  12385. - Print usage information for --dump-config when it is used without
  12386. an argument. Also, fix the error message to use different wording
  12387. and add newline at the end. Fixes bug 15541; bugfix
  12388. on 0.2.5.1-alpha.
  12389. o Minor bugfixes (logs):
  12390. - When building Tor under Clang, do not include an extra set of
  12391. parentheses in log messages that include function names. Fixes bug
  12392. 15269; bugfix on every released version of Tor when compiled with
  12393. recent enough Clang.
  12394. o Minor bugfixes (network):
  12395. - When attempting to use fallback technique for network interface
  12396. lookup, disregard loopback and multicast addresses since they are
  12397. unsuitable for public communications.
  12398. o Minor bugfixes (statistics):
  12399. - Disregard the ConnDirectionStatistics torrc options when Tor is
  12400. not a relay since in that mode of operation no sensible data is
  12401. being collected and because Tor might run into measurement hiccups
  12402. when running as a client for some time, then becoming a relay.
  12403. Fixes bug 15604; bugfix on 0.2.2.35.
  12404. o Minor bugfixes (test networks):
  12405. - When self-testing reachability, use ExtendAllowPrivateAddresses to
  12406. determine if local/private addresses imply reachability. The
  12407. previous fix used TestingTorNetwork, which implies
  12408. ExtendAllowPrivateAddresses, but this excluded rare configurations
  12409. where ExtendAllowPrivateAddresses is set but TestingTorNetwork is
  12410. not. Fixes bug 15771; bugfix on 0.2.6.1-alpha. Patch by "teor",
  12411. issue discovered by CJ Ess.
  12412. o Minor bugfixes (testing):
  12413. - Check for matching value in server response in ntor_ref.py. Fixes
  12414. bug 15591; bugfix on 0.2.4.8-alpha. Reported and fixed
  12415. by "joelanders".
  12416. - Set the severity correctly when testing
  12417. get_interface_addresses_ifaddrs() and
  12418. get_interface_addresses_win32(), so that the tests fail gracefully
  12419. instead of triggering an assertion. Fixes bug 15759; bugfix on
  12420. 0.2.6.3-alpha. Reported by Nicolas Derive.
  12421. o Code simplification and refactoring:
  12422. - Move the hacky fallback code out of get_interface_address6() into
  12423. separate function and get it covered with unit-tests. Resolves
  12424. ticket 14710.
  12425. - Refactor hidden service client-side cache lookup to intelligently
  12426. report its various failure cases, and disentangle failure cases
  12427. involving a lack of introduction points. Closes ticket 14391.
  12428. - Use our own Base64 encoder instead of OpenSSL's, to allow more
  12429. control over the output. Part of ticket 15652.
  12430. o Documentation:
  12431. - Improve the descriptions of statistics-related torrc options in
  12432. the manpage to describe rationale and possible uses cases. Fixes
  12433. issue 15550.
  12434. - Improve the layout and formatting of ./configure --help messages.
  12435. Closes ticket 15024. Patch from "cypherpunks".
  12436. - Standardize on the term "server descriptor" in the manual page.
  12437. Previously, we had used "router descriptor", "server descriptor",
  12438. and "relay descriptor" interchangeably. Part of ticket 14987.
  12439. o Removed code:
  12440. - Remove `USE_OPENSSL_BASE64` and the corresponding fallback code
  12441. and always use the internal Base64 decoder. The internal decoder
  12442. has been part of tor since 0.2.0.10-alpha, and no one should
  12443. be using the OpenSSL one. Part of ticket 15652.
  12444. - Remove the 'tor_strclear()' function; use memwipe() instead.
  12445. Closes ticket 14922.
  12446. o Removed features:
  12447. - Remove the (seldom-used) DynamicDHGroups feature. For anti-
  12448. fingerprinting we now recommend pluggable transports; for forward-
  12449. secrecy in TLS, we now use the P-256 group. Closes ticket 13736.
  12450. - Remove the undocumented "--digests" command-line option. It
  12451. complicated our build process, caused subtle build issues on
  12452. multiple platforms, and is now redundant since we started
  12453. including git version identifiers. Closes ticket 14742.
  12454. - Tor no longer contains checks for ancient directory cache versions
  12455. that didn't know about microdescriptors.
  12456. - Tor no longer contains workarounds for stat files generated by
  12457. super-old versions of Tor that didn't choose guards sensibly.
  12458. Changes in version 0.2.4.27 - 2015-04-06
  12459. Tor 0.2.4.27 backports two fixes from 0.2.6.7 for security issues that
  12460. could be used by an attacker to crash hidden services, or crash clients
  12461. visiting hidden services. Hidden services should upgrade as soon as
  12462. possible; clients should upgrade whenever packages become available.
  12463. This release also backports a simple improvement to make hidden
  12464. services a bit less vulnerable to denial-of-service attacks.
  12465. o Major bugfixes (security, hidden service):
  12466. - Fix an issue that would allow a malicious client to trigger an
  12467. assertion failure and halt a hidden service. Fixes bug 15600;
  12468. bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
  12469. - Fix a bug that could cause a client to crash with an assertion
  12470. failure when parsing a malformed hidden service descriptor. Fixes
  12471. bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
  12472. o Minor features (DoS-resistance, hidden service):
  12473. - Introduction points no longer allow multiple INTRODUCE1 cells to
  12474. arrive on the same circuit. This should make it more expensive for
  12475. attackers to overwhelm hidden services with introductions.
  12476. Resolves ticket 15515.
  12477. Changes in version 0.2.5.12 - 2015-04-06
  12478. Tor 0.2.5.12 backports two fixes from 0.2.6.7 for security issues that
  12479. could be used by an attacker to crash hidden services, or crash clients
  12480. visiting hidden services. Hidden services should upgrade as soon as
  12481. possible; clients should upgrade whenever packages become available.
  12482. This release also backports a simple improvement to make hidden
  12483. services a bit less vulnerable to denial-of-service attacks.
  12484. o Major bugfixes (security, hidden service):
  12485. - Fix an issue that would allow a malicious client to trigger an
  12486. assertion failure and halt a hidden service. Fixes bug 15600;
  12487. bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
  12488. - Fix a bug that could cause a client to crash with an assertion
  12489. failure when parsing a malformed hidden service descriptor. Fixes
  12490. bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
  12491. o Minor features (DoS-resistance, hidden service):
  12492. - Introduction points no longer allow multiple INTRODUCE1 cells to
  12493. arrive on the same circuit. This should make it more expensive for
  12494. attackers to overwhelm hidden services with introductions.
  12495. Resolves ticket 15515.
  12496. Changes in version 0.2.6.7 - 2015-04-06
  12497. Tor 0.2.6.7 fixes two security issues that could be used by an
  12498. attacker to crash hidden services, or crash clients visiting hidden
  12499. services. Hidden services should upgrade as soon as possible; clients
  12500. should upgrade whenever packages become available.
  12501. This release also contains two simple improvements to make hidden
  12502. services a bit less vulnerable to denial-of-service attacks.
  12503. o Major bugfixes (security, hidden service):
  12504. - Fix an issue that would allow a malicious client to trigger an
  12505. assertion failure and halt a hidden service. Fixes bug 15600;
  12506. bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
  12507. - Fix a bug that could cause a client to crash with an assertion
  12508. failure when parsing a malformed hidden service descriptor. Fixes
  12509. bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
  12510. o Minor features (DoS-resistance, hidden service):
  12511. - Introduction points no longer allow multiple INTRODUCE1 cells to
  12512. arrive on the same circuit. This should make it more expensive for
  12513. attackers to overwhelm hidden services with introductions.
  12514. Resolves ticket 15515.
  12515. - Decrease the amount of reattempts that a hidden service performs
  12516. when its rendezvous circuits fail. This reduces the computational
  12517. cost for running a hidden service under heavy load. Resolves
  12518. ticket 11447.
  12519. Changes in version 0.2.6.6 - 2015-03-24
  12520. Tor 0.2.6.6 is the first stable release in the 0.2.6 series.
  12521. It adds numerous safety, security, correctness, and performance
  12522. improvements. Client programs can be configured to use more kinds of
  12523. sockets, AutomapHosts works better, the multithreading backend is
  12524. improved, cell transmission is refactored, test coverage is much
  12525. higher, more denial-of-service attacks are handled, guard selection is
  12526. improved to handle long-term guards better, pluggable transports
  12527. should work a bit better, and some annoying hidden service performance
  12528. bugs should be addressed.
  12529. o Minor bugfixes (portability):
  12530. - Use the correct datatype in the SipHash-2-4 function to prevent
  12531. compilers from assuming any sort of alignment. Fixes bug 15436;
  12532. bugfix on 0.2.5.3-alpha.
  12533. Changes in version 0.2.6.5-rc - 2015-03-18
  12534. Tor 0.2.6.5-rc is the second and (hopefully) last release candidate in
  12535. the 0.2.6. It fixes a small number of bugs found in 0.2.6.4-rc.
  12536. o Major bugfixes (client):
  12537. - Avoid crashing when making certain configuration option changes on
  12538. clients. Fixes bug 15245; bugfix on 0.2.6.3-alpha. Reported
  12539. by "anonym".
  12540. o Major bugfixes (pluggable transports):
  12541. - Initialize the extended OR Port authentication cookie before
  12542. launching pluggable transports. This prevents a race condition
  12543. that occurred when server-side pluggable transports would cache the
  12544. authentication cookie before it has been (re)generated. Fixes bug
  12545. 15240; bugfix on 0.2.5.1-alpha.
  12546. o Major bugfixes (portability):
  12547. - Do not crash on startup when running on Solaris. Fixes a bug
  12548. related to our fix for 9495; bugfix on 0.2.6.1-alpha. Reported
  12549. by "ruebezahl".
  12550. o Minor features (heartbeat):
  12551. - On relays, report how many connections we negotiated using each
  12552. version of the Tor link protocols. This information will let us
  12553. know if removing support for very old versions of the Tor
  12554. protocols is harming the network. Closes ticket 15212.
  12555. o Code simplification and refactoring:
  12556. - Refactor main loop to extract the 'loop' part. This makes it
  12557. easier to run Tor under Shadow. Closes ticket 15176.
  12558. Changes in version 0.2.5.11 - 2015-03-17
  12559. Tor 0.2.5.11 is the second stable release in the 0.2.5 series.
  12560. It backports several bugfixes from the 0.2.6 branch, including a
  12561. couple of medium-level security fixes for relays and exit nodes.
  12562. It also updates the list of directory authorities.
  12563. o Directory authority changes:
  12564. - Remove turtles as a directory authority.
  12565. - Add longclaw as a new (v3) directory authority. This implements
  12566. ticket 13296. This keeps the directory authority count at 9.
  12567. - The directory authority Faravahar has a new IP address. This
  12568. closes ticket 14487.
  12569. o Major bugfixes (crash, OSX, security):
  12570. - Fix a remote denial-of-service opportunity caused by a bug in
  12571. OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
  12572. in OSX 10.9.
  12573. o Major bugfixes (relay, stability, possible security):
  12574. - Fix a bug that could lead to a relay crashing with an assertion
  12575. failure if a buffer of exactly the wrong layout was passed to
  12576. buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
  12577. 0.2.0.10-alpha. Patch from 'cypherpunks'.
  12578. - Do not assert if the 'data' pointer on a buffer is advanced to the
  12579. very end of the buffer; log a BUG message instead. Only assert if
  12580. it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
  12581. o Major bugfixes (exit node stability):
  12582. - Fix an assertion failure that could occur under high DNS load.
  12583. Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
  12584. diagnosed and fixed by "cypherpunks".
  12585. o Major bugfixes (Linux seccomp2 sandbox):
  12586. - Upon receiving sighup with the seccomp2 sandbox enabled, do not
  12587. crash during attempts to call wait4. Fixes bug 15088; bugfix on
  12588. 0.2.5.1-alpha. Patch from "sanic".
  12589. o Minor features (controller):
  12590. - New "GETINFO bw-event-cache" to get information about recent
  12591. bandwidth events. Closes ticket 14128. Useful for controllers to
  12592. get recent bandwidth history after the fix for ticket 13988.
  12593. o Minor features (geoip):
  12594. - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
  12595. - Update geoip6 to the March 3 2015 Maxmind GeoLite2
  12596. Country database.
  12597. o Minor bugfixes (client, automapping):
  12598. - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
  12599. no value follows the option. Fixes bug 14142; bugfix on
  12600. 0.2.4.7-alpha. Patch by "teor".
  12601. - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
  12602. 14195; bugfix on 0.1.0.1-rc.
  12603. o Minor bugfixes (compilation):
  12604. - Build without warnings with the stock OpenSSL srtp.h header, which
  12605. has a duplicate declaration of SSL_get_selected_srtp_profile().
  12606. Fixes bug 14220; this is OpenSSL's bug, not ours.
  12607. o Minor bugfixes (directory authority):
  12608. - Allow directory authorities to fetch more data from one another if
  12609. they find themselves missing lots of votes. Previously, they had
  12610. been bumping against the 10 MB queued data limit. Fixes bug 14261;
  12611. bugfix on 0.1.2.5-alpha.
  12612. - Enlarge the buffer to read bwauth generated files to avoid an
  12613. issue when parsing the file in dirserv_read_measured_bandwidths().
  12614. Fixes bug 14125; bugfix on 0.2.2.1-alpha.
  12615. o Minor bugfixes (statistics):
  12616. - Increase period over which bandwidth observations are aggregated
  12617. from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
  12618. o Minor bugfixes (preventative security, C safety):
  12619. - When reading a hexadecimal, base-32, or base-64 encoded value from
  12620. a string, always overwrite the whole output buffer. This prevents
  12621. some bugs where we would look at (but fortunately, not reveal)
  12622. uninitialized memory on the stack. Fixes bug 14013; bugfix on all
  12623. versions of Tor.
  12624. Changes in version 0.2.4.26 - 2015-03-17
  12625. Tor 0.2.4.26 includes an updated list of directory authorities. It
  12626. also backports a couple of stability and security bugfixes from 0.2.5
  12627. and beyond.
  12628. o Directory authority changes:
  12629. - Remove turtles as a directory authority.
  12630. - Add longclaw as a new (v3) directory authority. This implements
  12631. ticket 13296. This keeps the directory authority count at 9.
  12632. - The directory authority Faravahar has a new IP address. This
  12633. closes ticket 14487.
  12634. o Major bugfixes (exit node stability, also in 0.2.6.3-alpha):
  12635. - Fix an assertion failure that could occur under high DNS load.
  12636. Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
  12637. diagnosed and fixed by "cypherpunks".
  12638. o Major bugfixes (relay, stability, possible security, also in 0.2.6.4-rc):
  12639. - Fix a bug that could lead to a relay crashing with an assertion
  12640. failure if a buffer of exactly the wrong layout was passed to
  12641. buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
  12642. 0.2.0.10-alpha. Patch from 'cypherpunks'.
  12643. - Do not assert if the 'data' pointer on a buffer is advanced to the
  12644. very end of the buffer; log a BUG message instead. Only assert if
  12645. it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
  12646. o Minor features (geoip):
  12647. - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
  12648. - Update geoip6 to the March 3 2015 Maxmind GeoLite2
  12649. Country database.
  12650. Changes in version 0.2.6.4-rc - 2015-03-09
  12651. Tor 0.2.6.4-alpha fixes an issue in the directory code that an
  12652. attacker might be able to use in order to crash certain Tor
  12653. directories. It also resolves some minor issues left over from, or
  12654. introduced in, Tor 0.2.6.3-alpha or earlier.
  12655. o Major bugfixes (crash, OSX, security):
  12656. - Fix a remote denial-of-service opportunity caused by a bug in
  12657. OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
  12658. in OSX 10.9.
  12659. o Major bugfixes (relay, stability, possible security):
  12660. - Fix a bug that could lead to a relay crashing with an assertion
  12661. failure if a buffer of exactly the wrong layout is passed to
  12662. buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
  12663. 0.2.0.10-alpha. Patch from "cypherpunks".
  12664. - Do not assert if the 'data' pointer on a buffer is advanced to the
  12665. very end of the buffer; log a BUG message instead. Only assert if
  12666. it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
  12667. o Major bugfixes (FreeBSD IPFW transparent proxy):
  12668. - Fix address detection with FreeBSD transparent proxies, when
  12669. "TransProxyType ipfw" is in use. Fixes bug 15064; bugfix
  12670. on 0.2.5.4-alpha.
  12671. o Major bugfixes (Linux seccomp2 sandbox):
  12672. - Pass IPPROTO_TCP rather than 0 to socket(), so that the Linux
  12673. seccomp2 sandbox doesn't fail. Fixes bug 14989; bugfix
  12674. on 0.2.6.3-alpha.
  12675. - Allow AF_UNIX hidden services to be used with the seccomp2
  12676. sandbox. Fixes bug 15003; bugfix on 0.2.6.3-alpha.
  12677. - Upon receiving sighup with the seccomp2 sandbox enabled, do not
  12678. crash during attempts to call wait4. Fixes bug 15088; bugfix on
  12679. 0.2.5.1-alpha. Patch from "sanic".
  12680. o Minor features (controller):
  12681. - Messages about problems in the bootstrap process now include
  12682. information about the server we were trying to connect to when we
  12683. noticed the problem. Closes ticket 15006.
  12684. o Minor features (geoip):
  12685. - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
  12686. - Update geoip6 to the March 3 2015 Maxmind GeoLite2
  12687. Country database.
  12688. o Minor features (logs):
  12689. - Quiet some log messages in the heartbeat and at startup. Closes
  12690. ticket 14950.
  12691. o Minor bugfixes (certificate handling):
  12692. - If an authority operator accidentally makes a signing certificate
  12693. with a future publication time, do not discard its real signing
  12694. certificates. Fixes bug 11457; bugfix on 0.2.0.3-alpha.
  12695. - Remove any old authority certificates that have been superseded
  12696. for at least two days. Previously, we would keep superseded
  12697. certificates until they expired, if they were published close in
  12698. time to the certificate that superseded them. Fixes bug 11454;
  12699. bugfix on 0.2.1.8-alpha.
  12700. o Minor bugfixes (compilation):
  12701. - Fix a compilation warning on s390. Fixes bug 14988; bugfix
  12702. on 0.2.5.2-alpha.
  12703. - Fix a compilation warning on FreeBSD. Fixes bug 15151; bugfix
  12704. on 0.2.6.2-alpha.
  12705. o Minor bugfixes (testing):
  12706. - Fix endianness issues in unit test for resolve_my_address() to
  12707. have it pass on big endian systems. Fixes bug 14980; bugfix on
  12708. Tor 0.2.6.3-alpha.
  12709. - Avoid a side-effect in a tor_assert() in the unit tests. Fixes bug
  12710. 15188; bugfix on 0.1.2.3-alpha. Patch from Tom van der Woerdt.
  12711. - When running the new 'make test-stem' target, use the configured
  12712. python binary. Fixes bug 15037; bugfix on 0.2.6.3-alpha. Patch
  12713. from "cypherpunks".
  12714. - When running the zero-length-keys tests, do not use the default
  12715. torrc file. Fixes bug 15033; bugfix on 0.2.6.3-alpha. Reported
  12716. by "reezer".
  12717. o Directory authority IP change:
  12718. - The directory authority Faravahar has a new IP address. This
  12719. closes ticket 14487.
  12720. o Removed code:
  12721. - Remove some lingering dead code that once supported mempools.
  12722. Mempools were disabled by default in 0.2.5, and removed entirely
  12723. in 0.2.6.3-alpha. Closes more of ticket 14848; patch
  12724. by "cypherpunks".
  12725. Changes in version 0.2.6.3-alpha - 2015-02-19
  12726. Tor 0.2.6.3-alpha is the third (and hopefully final) alpha release in
  12727. the 0.2.6.x series. It introduces support for more kinds of sockets,
  12728. makes it harder to accidentally run an exit, improves our
  12729. multithreading backend, incorporates several fixes for the
  12730. AutomapHostsOnResolve option, and fixes numerous other bugs besides.
  12731. If no major regressions or security holes are found in this version,
  12732. the next version will be a release candidate.
  12733. o Deprecated versions:
  12734. - Tor relays older than 0.2.4.18-rc are no longer allowed to
  12735. advertise themselves on the network. Closes ticket 13555.
  12736. o Major features (security, unix domain sockets):
  12737. - Allow SocksPort to be an AF_UNIX Unix Domain Socket. Now high risk
  12738. applications can reach Tor without having to create AF_INET or
  12739. AF_INET6 sockets, meaning they can completely disable their
  12740. ability to make non-Tor network connections. To create a socket of
  12741. this type, use "SocksPort unix:/path/to/socket". Implements
  12742. ticket 12585.
  12743. - Support mapping hidden service virtual ports to AF_UNIX sockets.
  12744. The syntax is "HiddenServicePort 80 unix:/path/to/socket".
  12745. Implements ticket 11485.
  12746. o Major features (changed defaults):
  12747. - Prevent relay operators from unintentionally running exits: When a
  12748. relay is configured as an exit node, we now warn the user unless
  12749. the "ExitRelay" option is set to 1. We warn even more loudly if
  12750. the relay is configured with the default exit policy, since this
  12751. can indicate accidental misconfiguration. Setting "ExitRelay 0"
  12752. stops Tor from running as an exit relay. Closes ticket 10067.
  12753. o Major features (directory system):
  12754. - When downloading server- or microdescriptors from a directory
  12755. server, we no longer launch multiple simultaneous requests to the
  12756. same server. This reduces load on the directory servers,
  12757. especially when directory guards are in use. Closes ticket 9969.
  12758. - When downloading server- or microdescriptors over a tunneled
  12759. connection, do not limit the length of our requests to what the
  12760. Squid proxy is willing to handle. Part of ticket 9969.
  12761. - Authorities can now vote on the correct digests and latest
  12762. versions for different software packages. This allows packages
  12763. that include Tor to use the Tor authority system as a way to get
  12764. notified of updates and their correct digests. Implements proposal
  12765. 227. Closes ticket 10395.
  12766. o Major features (guards):
  12767. - Introduce the Guardfraction feature to improves load balancing on
  12768. guard nodes. Specifically, it aims to reduce the traffic gap that
  12769. guard nodes experience when they first get the Guard flag. This is
  12770. a required step if we want to increase the guard lifetime to 9
  12771. months or greater. Closes ticket 9321.
  12772. o Major features (performance):
  12773. - Make the CPU worker implementation more efficient by avoiding the
  12774. kernel and lengthening pipelines. The original implementation used
  12775. sockets to transfer data from the main thread to the workers, and
  12776. didn't allow any thread to be assigned more than a single piece of
  12777. work at once. The new implementation avoids communications
  12778. overhead by making requests in shared memory, avoiding kernel IO
  12779. where possible, and keeping more requests in flight at once.
  12780. Implements ticket 9682.
  12781. o Major features (relay):
  12782. - Raise the minimum acceptable configured bandwidth rate for bridges
  12783. to 50 KiB/sec and for relays to 75 KiB/sec. (The old values were
  12784. 20 KiB/sec.) Closes ticket 13822.
  12785. o Major bugfixes (exit node stability):
  12786. - Fix an assertion failure that could occur under high DNS load.
  12787. Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
  12788. diagnosed and fixed by "cypherpunks".
  12789. o Major bugfixes (mixed relay-client operation):
  12790. - When running as a relay and client at the same time (not
  12791. recommended), if we decide not to use a new guard because we want
  12792. to retry older guards, only close the locally-originating circuits
  12793. passing through that guard. Previously we would close all the
  12794. circuits through that guard. Fixes bug 9819; bugfix on
  12795. 0.2.1.1-alpha. Reported by "skruffy".
  12796. o Minor features (build):
  12797. - New --disable-system-torrc compile-time option to prevent Tor from
  12798. looking for the system-wide torrc or torrc-defaults files.
  12799. Resolves ticket 13037.
  12800. o Minor features (controller):
  12801. - Include SOCKS_USERNAME and SOCKS_PASSWORD values in controller
  12802. events so controllers can observe circuit isolation inputs. Closes
  12803. ticket 8405.
  12804. - ControlPort now supports the unix:/path/to/socket syntax as an
  12805. alternative to the ControlSocket option, for consistency with
  12806. SocksPort and HiddenServicePort. Closes ticket 14451.
  12807. - New "GETINFO bw-event-cache" to get information about recent
  12808. bandwidth events. Closes ticket 14128. Useful for controllers to
  12809. get recent bandwidth history after the fix for ticket 13988.
  12810. o Minor features (Denial of service resistance):
  12811. - Count the total number of bytes used storing hidden service
  12812. descriptors against the value of MaxMemInQueues. If we're low on
  12813. memory, and more than 20% of our memory is used holding hidden
  12814. service descriptors, free them until no more than 10% of our
  12815. memory holds hidden service descriptors. Free the least recently
  12816. fetched descriptors first. Resolves ticket 13806.
  12817. - When we have recently been under memory pressure (over 3/4 of
  12818. MaxMemInQueues is allocated), then allocate smaller zlib objects
  12819. for small requests. Closes ticket 11791.
  12820. o Minor features (geoip):
  12821. - Update geoip and geoip6 files to the January 7 2015 Maxmind
  12822. GeoLite2 Country database.
  12823. o Minor features (guard nodes):
  12824. - Reduce the time delay before saving guard status to disk from 10
  12825. minutes to 30 seconds (or from one hour to 10 minutes if
  12826. AvoidDiskWrites is set). Closes ticket 12485.
  12827. o Minor features (hidden service):
  12828. - Make Sybil attacks against hidden services harder by changing the
  12829. minimum time required to get the HSDir flag from 25 hours up to 96
  12830. hours. Addresses ticket 14149.
  12831. - New option "HiddenServiceAllowUnknownPorts" to allow hidden
  12832. services to disable the anti-scanning feature introduced in
  12833. 0.2.6.2-alpha. With this option not set, a connection to an
  12834. unlisted port closes the circuit. With this option set, only a
  12835. RELAY_DONE cell is sent. Closes ticket 14084.
  12836. o Minor features (interface):
  12837. - Implement "-f -" command-line option to read torrc configuration
  12838. from standard input, if you don't want to store the torrc file in
  12839. the file system. Implements feature 13865.
  12840. o Minor features (logging):
  12841. - Add a count of unique clients to the bridge heartbeat message.
  12842. Resolves ticket 6852.
  12843. - Suppress "router info incompatible with extra info" message when
  12844. reading extrainfo documents from cache. (This message got loud
  12845. around when we closed bug 9812 in 0.2.6.2-alpha.) Closes
  12846. ticket 13762.
  12847. - Elevate hidden service authorized-client message from DEBUG to
  12848. INFO. Closes ticket 14015.
  12849. o Minor features (stability):
  12850. - Add assertions in our hash-table iteration code to check for
  12851. corrupted values that could cause infinite loops. Closes
  12852. ticket 11737.
  12853. o Minor features (systemd):
  12854. - Various improvements and modernizations in systemd hardening
  12855. support. Closes ticket 13805. Patch from Craig Andrews.
  12856. o Minor features (testing networks):
  12857. - Drop the minimum RendPostPeriod on a testing network to 5 seconds,
  12858. and the default on a testing network to 2 minutes. Drop the
  12859. MIN_REND_INITIAL_POST_DELAY on a testing network to 5 seconds, but
  12860. keep the default on a testing network at 30 seconds. This reduces
  12861. HS bootstrap time to around 25 seconds. Also, change the default
  12862. time in test-network.sh to match. Closes ticket 13401. Patch
  12863. by "teor".
  12864. - Create TestingDirAuthVoteHSDir to correspond to
  12865. TestingDirAuthVoteExit/Guard. Ensures that authorities vote the
  12866. HSDir flag for the listed relays regardless of uptime or ORPort
  12867. connectivity. Respects the value of VoteOnHidServDirectoriesV2.
  12868. Partial implementation for ticket 14067. Patch by "teor".
  12869. o Minor features (tor2web mode):
  12870. - Introduce the config option Tor2webRendezvousPoints, which allows
  12871. clients in Tor2webMode to select a specific Rendezvous Point to be
  12872. used in HS circuits. This might allow better performance for
  12873. Tor2Web nodes. Implements ticket 12844.
  12874. o Minor bugfixes (client DNS):
  12875. - Report the correct cached DNS expiration times on SOCKS port or in
  12876. DNS replies. Previously, we would report everything as "never
  12877. expires." Fixes bug 14193; bugfix on 0.2.3.17-beta.
  12878. - Avoid a small memory leak when we find a cached answer for a
  12879. reverse DNS lookup in a client-side DNS cache. (Remember, client-
  12880. side DNS caching is off by default, and is not recommended.) Fixes
  12881. bug 14259; bugfix on 0.2.0.1-alpha.
  12882. o Minor bugfixes (client, automapping):
  12883. - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
  12884. no value follows the option. Fixes bug 14142; bugfix on
  12885. 0.2.4.7-alpha. Patch by "teor".
  12886. - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
  12887. 14195; bugfix on 0.1.0.1-rc.
  12888. - Prevent changes to other options from removing the wildcard value
  12889. "." from "AutomapHostsSuffixes". Fixes bug 12509; bugfix
  12890. on 0.2.0.1-alpha.
  12891. - Allow MapAddress and AutomapHostsOnResolve to work together when
  12892. an address is mapped into another address type (like .onion) that
  12893. must be automapped at resolve time. Fixes bug 7555; bugfix
  12894. on 0.2.0.1-alpha.
  12895. o Minor bugfixes (client, bridges):
  12896. - When we are using bridges and we had a network connectivity
  12897. problem, only retry connecting to our currently configured
  12898. bridges, not all bridges we know about and remember using. Fixes
  12899. bug 14216; bugfix on 0.2.2.17-alpha.
  12900. o Minor bugfixes (client, IPv6):
  12901. - Reject socks requests to literal IPv6 addresses when IPv6Traffic
  12902. flag is not set; and not because the NoIPv4Traffic flag was set.
  12903. Previously we'd looked at the NoIPv4Traffic flag for both types of
  12904. literal addresses. Fixes bug 14280; bugfix on 0.2.4.7-alpha.
  12905. o Minor bugfixes (compilation):
  12906. - The address of an array in the middle of a structure will always
  12907. be non-NULL. clang recognises this and complains. Disable the
  12908. tautologous and redundant check to silence this warning. Fixes bug
  12909. 14001; bugfix on 0.2.1.2-alpha.
  12910. - Avoid warnings when building with systemd 209 or later. Fixes bug
  12911. 14072; bugfix on 0.2.6.2-alpha. Patch from "h.venev".
  12912. - Compile correctly with (unreleased) OpenSSL 1.1.0 headers.
  12913. Addresses ticket 14188.
  12914. - Build without warnings with the stock OpenSSL srtp.h header, which
  12915. has a duplicate declaration of SSL_get_selected_srtp_profile().
  12916. Fixes bug 14220; this is OpenSSL's bug, not ours.
  12917. - Do not compile any code related to Tor2Web mode when Tor2Web mode
  12918. is not enabled at compile time. Previously, this code was included
  12919. in a disabled state. See discussion on ticket 12844.
  12920. - Remove the --disable-threads configure option again. It was
  12921. accidentally partially reintroduced in 29ac883606d6d. Fixes bug
  12922. 14819; bugfix on 0.2.6.2-alpha.
  12923. o Minor bugfixes (controller):
  12924. - Report "down" in response to the "GETINFO entry-guards" command
  12925. when relays are down with an unreachable_since value. Previously,
  12926. we would report "up". Fixes bug 14184; bugfix on 0.1.2.2-alpha.
  12927. - Avoid crashing on a malformed EXTENDCIRCUIT command. Fixes bug
  12928. 14116; bugfix on 0.2.2.9-alpha.
  12929. - Add a code for the END_CIRC_REASON_IP_NOW_REDUNDANT circuit close
  12930. reason. Fixes bug 14207; bugfix on 0.2.6.2-alpha.
  12931. o Minor bugfixes (directory authority):
  12932. - Allow directory authorities to fetch more data from one another if
  12933. they find themselves missing lots of votes. Previously, they had
  12934. been bumping against the 10 MB queued data limit. Fixes bug 14261;
  12935. bugfix on 0.1.2.5-alpha.
  12936. - Do not attempt to download extrainfo documents which we will be
  12937. unable to validate with a matching server descriptor. Fixes bug
  12938. 13762; bugfix on 0.2.0.1-alpha.
  12939. - Fix a bug that was truncating AUTHDIR_NEWDESC events sent to the
  12940. control port. Fixes bug 14953; bugfix on 0.2.0.1-alpha.
  12941. - Enlarge the buffer to read bwauth generated files to avoid an
  12942. issue when parsing the file in dirserv_read_measured_bandwidths().
  12943. Fixes bug 14125; bugfix on 0.2.2.1-alpha.
  12944. o Minor bugfixes (file handling):
  12945. - Stop failing when key files are zero-length. Instead, generate new
  12946. keys, and overwrite the empty key files. Fixes bug 13111; bugfix
  12947. on all versions of Tor. Patch by "teor".
  12948. - Stop generating a fresh .old RSA onion key file when the .old file
  12949. is missing. Fixes part of 13111; bugfix on 0.0.6rc1.
  12950. - Avoid overwriting .old key files with empty key files.
  12951. - Skip loading zero-length extrainfo store, router store, stats,
  12952. state, and key files.
  12953. - Avoid crashing when trying to reload a torrc specified as a
  12954. relative path with RunAsDaemon turned on. Fixes bug 13397; bugfix
  12955. on 0.2.3.11-alpha.
  12956. o Minor bugfixes (hidden services):
  12957. - Close the introduction circuit when we have no more usable intro
  12958. points, instead of waiting for it to time out. This also ensures
  12959. that no follow-up HS descriptor fetch is triggered when the
  12960. circuit eventually times out. Fixes bug 14224; bugfix on 0.0.6.
  12961. - When fetching a hidden service descriptor for a down service that
  12962. was recently up, do not keep refetching until we try the same
  12963. replica twice in a row. Fixes bug 14219; bugfix on 0.2.0.10-alpha.
  12964. - Successfully launch Tor with a nonexistent hidden service
  12965. directory. Our fix for bug 13942 didn't catch this case. Fixes bug
  12966. 14106; bugfix on 0.2.6.2-alpha.
  12967. o Minor bugfixes (logging):
  12968. - Avoid crashing when there are more log domains than entries in
  12969. domain_list. Bugfix on 0.2.3.1-alpha.
  12970. - Add a string representation for LD_SCHED. Fixes bug 14740; bugfix
  12971. on 0.2.6.1-alpha.
  12972. - Don't log messages to stdout twice when starting up. Fixes bug
  12973. 13993; bugfix on 0.2.6.1-alpha.
  12974. o Minor bugfixes (parsing):
  12975. - Stop accepting milliseconds (or other junk) at the end of
  12976. descriptor publication times. Fixes bug 9286; bugfix on 0.0.2pre25.
  12977. - Support two-number and three-number version numbers correctly, in
  12978. case we change the Tor versioning system in the future. Fixes bug
  12979. 13661; bugfix on 0.0.8pre1.
  12980. o Minor bugfixes (path counting):
  12981. - When deciding whether the consensus lists any exit nodes, count
  12982. the number listed in the consensus, not the number we have
  12983. descriptors for. Fixes part of bug 14918; bugfix on 0.2.6.2-alpha.
  12984. - When deciding whether we have any exit nodes, only examine
  12985. ExitNodes when the ExitNodes option is actually set. Fixes part of
  12986. bug 14918; bugfix on 0.2.6.2-alpha.
  12987. - Get rid of redundant and possibly scary warnings that we are
  12988. missing directory information while we bootstrap. Fixes part of
  12989. bug 14918; bugfix on 0.2.6.2-alpha.
  12990. o Minor bugfixes (portability):
  12991. - Fix the ioctl()-based network interface lookup code so that it
  12992. will work on systems that have variable-length struct ifreq, for
  12993. example Mac OS X.
  12994. - Fix scheduler compilation on targets where char is unsigned. Fixes
  12995. bug 14764; bugfix on 0.2.6.2-alpha. Reported by Christian Kujau.
  12996. o Minor bugfixes (sandbox):
  12997. - Allow glibc fatal errors to be sent to stderr before Tor exits.
  12998. Previously, glibc would try to write them to /dev/tty, and the
  12999. sandbox would trap the call and make Tor exit prematurely. Fixes
  13000. bug 14759; bugfix on 0.2.5.1-alpha.
  13001. o Minor bugfixes (shutdown):
  13002. - When shutting down, always call event_del() on lingering read or
  13003. write events before freeing them. Otherwise, we risk double-frees
  13004. or read-after-frees in event_base_free(). Fixes bug 12985; bugfix
  13005. on 0.1.0.2-rc.
  13006. o Minor bugfixes (small memory leaks):
  13007. - Avoid leaking memory when using IPv6 virtual address mappings.
  13008. Fixes bug 14123; bugfix on 0.2.4.7-alpha. Patch by Tom van
  13009. der Woerdt.
  13010. o Minor bugfixes (statistics):
  13011. - Increase period over which bandwidth observations are aggregated
  13012. from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
  13013. o Minor bugfixes (systemd support):
  13014. - Fix detection and operation of systemd watchdog. Fixes part of bug
  13015. 14141; bugfix on 0.2.6.2-alpha. Patch from Tomasz Torcz.
  13016. - Run correctly under systemd with the RunAsDaemon option set. Fixes
  13017. part of bug 14141; bugfix on 0.2.5.7-rc. Patch from Tomasz Torcz.
  13018. - Inform the systemd supervisor about more changes in the Tor
  13019. process status. Implements part of ticket 14141. Patch from
  13020. Tomasz Torcz.
  13021. - Cause the "--disable-systemd" option to actually disable systemd
  13022. support. Fixes bug 14350; bugfix on 0.2.6.2-alpha. Patch
  13023. from "blueness".
  13024. o Minor bugfixes (TLS):
  13025. - Check more thoroughly throughout the TLS code for possible
  13026. unlogged TLS errors. Possible diagnostic or fix for bug 13319.
  13027. o Minor bugfixes (transparent proxy):
  13028. - Use getsockname, not getsockopt, to retrieve the address for a
  13029. TPROXY-redirected connection. Fixes bug 13796; bugfix
  13030. on 0.2.5.2-alpha.
  13031. o Code simplification and refactoring:
  13032. - Move fields related to isolating and configuring client ports into
  13033. a shared structure. Previously, they were duplicated across
  13034. port_cfg_t, listener_connection_t, and edge_connection_t. Failure
  13035. to copy them correctly had been the cause of at least one bug in
  13036. the past. Closes ticket 8546.
  13037. - Refactor the get_interface_addresses_raw() doom-function into
  13038. multiple smaller and simpler subfunctions. Cover the resulting
  13039. subfunctions with unit-tests. Fixes a significant portion of
  13040. issue 12376.
  13041. - Remove workaround in dirserv_thinks_router_is_hs_dir() that was
  13042. only for version <= 0.2.2.24 which is now deprecated. Closes
  13043. ticket 14202.
  13044. - Remove a test for a long-defunct broken version-one
  13045. directory server.
  13046. o Documentation:
  13047. - Adding section on OpenBSD to our TUNING document. Thanks to mmcc
  13048. for writing the OpenBSD-specific tips. Resolves ticket 13702.
  13049. - Make the tor-resolve documentation match its help string and its
  13050. options. Resolves part of ticket 14325.
  13051. - Log a more useful error message from tor-resolve when failing to
  13052. look up a hidden service address. Resolves part of ticket 14325.
  13053. o Downgraded warnings:
  13054. - Don't warn when we've attempted to contact a relay using the wrong
  13055. ntor onion key. Closes ticket 9635.
  13056. o Removed features:
  13057. - To avoid confusion with the "ExitRelay" option, "ExitNode" is no
  13058. longer silently accepted as an alias for "ExitNodes".
  13059. - The --enable-mempool and --enable-buf-freelists options, which
  13060. were originally created to work around bad malloc implementations,
  13061. no longer exist. They were off-by-default in 0.2.5. Closes
  13062. ticket 14848.
  13063. o Testing:
  13064. - Make the checkdir/perms test complete successfully even if the
  13065. global umask is not 022. Fixes bug 14215; bugfix on 0.2.6.2-alpha.
  13066. - Test that tor does not fail when key files are zero-length. Check
  13067. that tor generates new keys, and overwrites the empty key files.
  13068. - Test that tor generates new keys when keys are missing
  13069. (existing behavior).
  13070. - Test that tor does not overwrite key files that already contain
  13071. data (existing behavior). Tests bug 13111. Patch by "teor".
  13072. - New "make test-stem" target to run stem integration tests.
  13073. Requires that the "STEM_SOURCE_DIR" environment variable be set.
  13074. Closes ticket 14107.
  13075. - Make the test_cmdline_args.py script work correctly on Windows.
  13076. Patch from Gisle Vanem.
  13077. - Move the slower unit tests into a new "./src/test/test-slow"
  13078. binary that can be run independently of the other tests. Closes
  13079. ticket 13243.
  13080. - Avoid undefined behavior when sampling huge values from the
  13081. Laplace distribution. This made unittests fail on Raspberry Pi.
  13082. Bug found by Device. Fixes bug 14090; bugfix on 0.2.6.2-alpha.
  13083. Changes in version 0.2.6.2-alpha - 2014-12-31
  13084. Tor 0.2.6.2-alpha is the second alpha release in the 0.2.6.x series.
  13085. It introduces a major new backend for deciding when to send cells on
  13086. channels, which should lead down the road to big performance
  13087. increases. It contains security and statistics features for better
  13088. work on hidden services, and numerous bugfixes.
  13089. This release contains many new unit tests, along with major
  13090. performance improvements for running testing networks using Chutney.
  13091. Thanks to a series of patches contributed by "teor", testing networks
  13092. should now bootstrap in seconds, rather than minutes.
  13093. o Major features (relay, infrastructure):
  13094. - Complete revision of the code that relays use to decide which cell
  13095. to send next. Formerly, we selected the best circuit to write on
  13096. each channel, but we didn't select among channels in any
  13097. sophisticated way. Now, we choose the best circuits globally from
  13098. among those whose channels are ready to deliver traffic.
  13099. This patch implements a new inter-cmux comparison API, a global
  13100. high/low watermark mechanism and a global scheduler loop for
  13101. transmission prioritization across all channels as well as among
  13102. circuits on one channel. This schedule is currently tuned to
  13103. (tolerantly) avoid making changes in network performance, but it
  13104. should form the basis for major circuit performance increases in
  13105. the future. Code by Andrea; tuning by Rob Jansen; implements
  13106. ticket 9262.
  13107. o Major features (hidden services):
  13108. - Make HS port scanning more difficult by immediately closing the
  13109. circuit when a user attempts to connect to a nonexistent port.
  13110. Closes ticket 13667.
  13111. - Add a HiddenServiceStatistics option that allows Tor relays to
  13112. gather and publish statistics about the overall size and volume of
  13113. hidden service usage. Specifically, when this option is turned on,
  13114. an HSDir will publish an approximate number of hidden services
  13115. that have published descriptors to it the past 24 hours. Also, if
  13116. a relay has acted as a hidden service rendezvous point, it will
  13117. publish the approximate amount of rendezvous cells it has relayed
  13118. the past 24 hours. The statistics themselves are obfuscated so
  13119. that the exact values cannot be derived. For more details see
  13120. proposal 238, "Better hidden service stats from Tor relays". This
  13121. feature is currently disabled by default. Implements feature 13192.
  13122. o Major bugfixes (client, automap):
  13123. - Repair automapping with IPv6 addresses. This automapping should
  13124. have worked previously, but one piece of debugging code that we
  13125. inserted to detect a regression actually caused the regression to
  13126. manifest itself again. Fixes bug 13811 and bug 12831; bugfix on
  13127. 0.2.4.7-alpha. Diagnosed and fixed by Francisco Blas
  13128. Izquierdo Riera.
  13129. o Major bugfixes (hidden services):
  13130. - When closing an introduction circuit that was opened in parallel
  13131. with others, don't mark the introduction point as unreachable.
  13132. Previously, the first successful connection to an introduction
  13133. point would make the other introduction points get marked as
  13134. having timed out. Fixes bug 13698; bugfix on 0.0.6rc2.
  13135. o Directory authority changes:
  13136. - Remove turtles as a directory authority.
  13137. - Add longclaw as a new (v3) directory authority. This implements
  13138. ticket 13296. This keeps the directory authority count at 9.
  13139. o Major removed features:
  13140. - Tor clients no longer support connecting to hidden services
  13141. running on Tor 0.2.2.x and earlier; the Support022HiddenServices
  13142. option has been removed. (There shouldn't be any hidden services
  13143. running these versions on the network.) Closes ticket 7803.
  13144. o Minor features (client):
  13145. - Validate hostnames in SOCKS5 requests more strictly. If SafeSocks
  13146. is enabled, reject requests with IP addresses as hostnames.
  13147. Resolves ticket 13315.
  13148. o Minor features (controller):
  13149. - Add a "SIGNAL HEARTBEAT" controller command that tells Tor to
  13150. write an unscheduled heartbeat message to the log. Implements
  13151. feature 9503.
  13152. o Minor features (geoip):
  13153. - Update geoip and geoip6 to the November 15 2014 Maxmind GeoLite2
  13154. Country database.
  13155. o Minor features (hidden services):
  13156. - When re-enabling the network, don't try to build introduction
  13157. circuits until we have successfully built a circuit. This makes
  13158. hidden services come up faster when the network is re-enabled.
  13159. Patch from "akwizgran". Closes ticket 13447.
  13160. - When we fail to retrieve a hidden service descriptor, send the
  13161. controller an "HS_DESC FAILED" controller event. Implements
  13162. feature 13212.
  13163. - New HiddenServiceDirGroupReadable option to cause hidden service
  13164. directories and hostname files to be created group-readable. Patch
  13165. from "anon", David Stainton, and "meejah". Closes ticket 11291.
  13166. o Minor features (systemd):
  13167. - Where supported, when running with systemd, report successful
  13168. startup to systemd. Part of ticket 11016. Patch by Michael Scherer.
  13169. - When running with systemd, support systemd watchdog messages. Part
  13170. of ticket 11016. Patch by Michael Scherer.
  13171. o Minor features (transparent proxy):
  13172. - Update the transparent proxy option checks to allow for both ipfw
  13173. and pf on OS X. Closes ticket 14002.
  13174. - Use the correct option when using IPv6 with transparent proxy
  13175. support on Linux. Resolves 13808. Patch by Francisco Blas
  13176. Izquierdo Riera.
  13177. o Minor bugfixes (preventative security, C safety):
  13178. - When reading a hexadecimal, base-32, or base-64 encoded value from
  13179. a string, always overwrite the whole output buffer. This prevents
  13180. some bugs where we would look at (but fortunately, not reveal)
  13181. uninitialized memory on the stack. Fixes bug 14013; bugfix on all
  13182. versions of Tor.
  13183. - Clear all memory targeted by tor_addr_{to,from}_sockaddr(), not
  13184. just the part that's used. This makes it harder for data leak bugs
  13185. to occur in the event of other programming failures. Resolves
  13186. ticket 14041.
  13187. o Minor bugfixes (client, microdescriptors):
  13188. - Use a full 256 bits of the SHA256 digest of a microdescriptor when
  13189. computing which microdescriptors to download. This keeps us from
  13190. erroneous download behavior if two microdescriptor digests ever
  13191. have the same first 160 bits. Fixes part of bug 13399; bugfix
  13192. on 0.2.3.1-alpha.
  13193. - Reset a router's status if its microdescriptor digest changes,
  13194. even if the first 160 bits remain the same. Fixes part of bug
  13195. 13399; bugfix on 0.2.3.1-alpha.
  13196. o Minor bugfixes (compilation):
  13197. - Silence clang warnings under --enable-expensive-hardening,
  13198. including implicit truncation of 64 bit values to 32 bit, const
  13199. char assignment to self, tautological compare, and additional
  13200. parentheses around equality tests. Fixes bug 13577; bugfix
  13201. on 0.2.5.4-alpha.
  13202. - Fix a clang warning about checking whether an address in the
  13203. middle of a structure is NULL. Fixes bug 14001; bugfix
  13204. on 0.2.1.2-alpha.
  13205. o Minor bugfixes (hidden services):
  13206. - Correctly send a controller event when we find that a rendezvous
  13207. circuit has finished. Fixes bug 13936; bugfix on 0.1.1.5-alpha.
  13208. - Pre-check directory permissions for new hidden-services to avoid
  13209. at least one case of "Bug: Acting on config options left us in a
  13210. broken state. Dying." Fixes bug 13942; bugfix on 0.0.6pre1.
  13211. - When adding a new hidden service (for example, via SETCONF), Tor
  13212. no longer congratulates the user for running a relay. Fixes bug
  13213. 13941; bugfix on 0.2.6.1-alpha.
  13214. - When fetching hidden service descriptors, we now check not only
  13215. for whether we got the hidden service we had in mind, but also
  13216. whether we got the particular descriptors we wanted. This prevents
  13217. a class of inefficient but annoying DoS attacks by hidden service
  13218. directories. Fixes bug 13214; bugfix on 0.2.1.6-alpha. Reported
  13219. by "special".
  13220. o Minor bugfixes (Linux seccomp2 sandbox):
  13221. - Make transparent proxy support work along with the seccomp2
  13222. sandbox. Fixes part of bug 13808; bugfix on 0.2.5.1-alpha. Patch
  13223. by Francisco Blas Izquierdo Riera.
  13224. - Fix a memory leak in tor-resolve when running with the sandbox
  13225. enabled. Fixes bug 14050; bugfix on 0.2.5.9-rc.
  13226. o Minor bugfixes (logging):
  13227. - Downgrade warnings about RSA signature failures to info log level.
  13228. Emit a warning when an extra info document is found incompatible
  13229. with a corresponding router descriptor. Fixes bug 9812; bugfix
  13230. on 0.0.6rc3.
  13231. - Make connection_ap_handshake_attach_circuit() log the circuit ID
  13232. correctly. Fixes bug 13701; bugfix on 0.0.6.
  13233. o Minor bugfixes (misc):
  13234. - Stop allowing invalid address patterns like "*/24" that contain
  13235. both a wildcard address and a bit prefix length. This affects all
  13236. our address-range parsing code. Fixes bug 7484; bugfix
  13237. on 0.0.2pre14.
  13238. o Minor bugfixes (testing networks, fast startup):
  13239. - Allow Tor to build circuits using a consensus with no exits. If
  13240. the consensus has no exits (typical of a bootstrapping test
  13241. network), allow Tor to build circuits once enough descriptors have
  13242. been downloaded. This assists in bootstrapping a testing Tor
  13243. network. Fixes bug 13718; bugfix on 0.2.4.10-alpha. Patch
  13244. by "teor".
  13245. - When V3AuthVotingInterval is low, give a lower If-Modified-Since
  13246. header to directory servers. This allows us to obtain consensuses
  13247. promptly when the consensus interval is very short. This assists
  13248. in bootstrapping a testing Tor network. Fixes parts of bugs 13718
  13249. and 13963; bugfix on 0.2.0.3-alpha. Patch by "teor".
  13250. - Stop assuming that private addresses are local when checking
  13251. reachability in a TestingTorNetwork. Instead, when testing, assume
  13252. all OR connections are remote. (This is necessary due to many test
  13253. scenarios running all relays on localhost.) This assists in
  13254. bootstrapping a testing Tor network. Fixes bug 13924; bugfix on
  13255. 0.1.0.1-rc. Patch by "teor".
  13256. - Avoid building exit circuits from a consensus with no exits. Now
  13257. thanks to our fix for 13718, we accept a no-exit network as not
  13258. wholly lost, but we need to remember not to try to build exit
  13259. circuits on it. Closes ticket 13814; patch by "teor".
  13260. - Stop requiring exits to have non-zero bandwithcapacity in a
  13261. TestingTorNetwork. Instead, when TestingMinExitFlagThreshold is 0,
  13262. ignore exit bandwidthcapacity. This assists in bootstrapping a
  13263. testing Tor network. Fixes parts of bugs 13718 and 13839; bugfix
  13264. on 0.2.0.3-alpha. Patch by "teor".
  13265. - Add "internal" to some bootstrap statuses when no exits are
  13266. available. If the consensus does not contain Exits, Tor will only
  13267. build internal circuits. In this case, relevant statuses will
  13268. contain the word "internal" as indicated in the Tor control-
  13269. spec.txt. When bootstrap completes, Tor will be ready to build
  13270. internal circuits. If a future consensus contains Exits, exit
  13271. circuits may become available. Fixes part of bug 13718; bugfix on
  13272. 0.2.4.10-alpha. Patch by "teor".
  13273. - Decrease minimum consensus interval to 10 seconds when
  13274. TestingTorNetwork is set, or 5 seconds for the first consensus.
  13275. Fix assumptions throughout the code that assume larger intervals.
  13276. Fixes bugs 13718 and 13823; bugfix on 0.2.0.3-alpha. Patch
  13277. by "teor".
  13278. - Avoid excluding guards from path building in minimal test
  13279. networks, when we're in a test network and excluding guards would
  13280. exclude all relays. This typically occurs in incredibly small tor
  13281. networks, and those using "TestingAuthVoteGuard *". Fixes part of
  13282. bug 13718; bugfix on 0.1.1.11-alpha. Patch by "teor".
  13283. o Code simplification and refactoring:
  13284. - Stop using can_complete_circuits as a global variable; access it
  13285. with a function instead.
  13286. - Avoid using operators directly as macro arguments: this lets us
  13287. apply coccinelle transformations to our codebase more directly.
  13288. Closes ticket 13172.
  13289. - Combine the functions used to parse ClientTransportPlugin and
  13290. ServerTransportPlugin into a single function. Closes ticket 6456.
  13291. - Add inline functions and convenience macros for inspecting channel
  13292. state. Refactor the code to use convenience macros instead of
  13293. checking channel state directly. Fixes issue 7356.
  13294. - Document all members of was_router_added_t and rename
  13295. ROUTER_WAS_NOT_NEW to ROUTER_IS_ALREADY_KNOWN to make it less
  13296. confusable with ROUTER_WAS_TOO_OLD. Fixes issue 13644.
  13297. - In connection_exit_begin_conn(), use END_CIRC_REASON_TORPROTOCOL
  13298. constant instead of hardcoded value. Fixes issue 13840.
  13299. - Refactor our generic strmap and digestmap types into a single
  13300. implementation, so that we can add a new digest256map
  13301. type trivially.
  13302. o Documentation:
  13303. - Document the bridge-authority-only 'networkstatus-bridges' file.
  13304. Closes ticket 13713; patch from "tom".
  13305. - Fix typo in PredictedPortsRelevanceTime option description in
  13306. manpage. Resolves issue 13707.
  13307. - Stop suggesting that users specify relays by nickname: it isn't a
  13308. good idea. Also, properly cross-reference how to specify relays in
  13309. all parts of manual documenting options that take a list of
  13310. relays. Closes ticket 13381.
  13311. - Clarify the HiddenServiceDir option description in manpage to make
  13312. it clear that relative paths are taken with respect to the current
  13313. working directory. Also clarify that this behavior is not
  13314. guaranteed to remain indefinitely. Fixes issue 13913.
  13315. o Testing:
  13316. - New tests for many parts of channel, relay, and circuitmux
  13317. functionality. Code by Andrea; part of 9262.
  13318. - New tests for parse_transport_line(). Part of ticket 6456.
  13319. - In the unit tests, use chgrp() to change the group of the unit
  13320. test temporary directory to the current user, so that the sticky
  13321. bit doesn't interfere with tests that check directory groups.
  13322. Closes 13678.
  13323. - Add unit tests for resolve_my_addr(). Part of ticket 12376; patch
  13324. by 'rl1987'.
  13325. Changes in version 0.2.6.1-alpha - 2014-10-30
  13326. Tor 0.2.6.1-alpha is the first release in the Tor 0.2.6.x series. It
  13327. includes numerous code cleanups and new tests, and fixes a large
  13328. number of annoying bugs. Out-of-memory conditions are handled better
  13329. than in 0.2.5, pluggable transports have improved proxy support, and
  13330. clients now use optimistic data for contacting hidden services. Also,
  13331. we are now more robust to changes in what we consider a parseable
  13332. directory object, so that tightening restrictions does not have a risk
  13333. of introducing infinite download loops.
  13334. This is the first alpha release in a new series, so expect there to be
  13335. bugs. Users who would rather test out a more stable branch should stay
  13336. with 0.2.5.x for now.
  13337. o New compiler and system requirements:
  13338. - Tor 0.2.6.x requires that your compiler support more of the C99
  13339. language standard than before. The 'configure' script now detects
  13340. whether your compiler supports C99 mid-block declarations and
  13341. designated initializers. If it does not, Tor will not compile.
  13342. We may revisit this requirement if it turns out that a significant
  13343. number of people need to build Tor with compilers that don't
  13344. bother implementing a 15-year-old standard. Closes ticket 13233.
  13345. - Tor no longer supports systems without threading support. When we
  13346. began working on Tor, there were several systems that didn't have
  13347. threads, or where the thread support wasn't able to run the
  13348. threads of a single process on multiple CPUs. That no longer
  13349. holds: every system where Tor needs to run well now has threading
  13350. support. Resolves ticket 12439.
  13351. o Removed platform support:
  13352. - We no longer include special code to build on Windows CE; as far
  13353. as we know, nobody has used Tor on Windows CE in a very long time.
  13354. Closes ticket 11446.
  13355. o Major features (bridges):
  13356. - Expose the outgoing upstream HTTP/SOCKS proxy to pluggable
  13357. transports if they are configured via the "TOR_PT_PROXY"
  13358. environment variable. Implements proposal 232. Resolves
  13359. ticket 8402.
  13360. o Major features (client performance, hidden services):
  13361. - Allow clients to use optimistic data when connecting to a hidden
  13362. service, which should remove a round-trip from hidden service
  13363. initialization. See proposal 181 for details. Implements
  13364. ticket 13211.
  13365. o Major features (directory system):
  13366. - Upon receiving an unparseable directory object, if its digest
  13367. matches what we expected, then don't try to download it again.
  13368. Previously, when we got a descriptor we didn't like, we would keep
  13369. trying to download it over and over. Closes ticket 11243.
  13370. o Major features (sample torrc):
  13371. - Add a new, infrequently-changed "torrc.minimal". This file is
  13372. similar to torrc.sample, but it will change as infrequently as
  13373. possible, for the benefit of users whose systems prompt them for
  13374. intervention whenever a default configuration file is changed.
  13375. Making this change allows us to update torrc.sample to be a more
  13376. generally useful "sample torrc".
  13377. o Major bugfixes (directory authorities):
  13378. - Do not assign the HSDir flag to relays if they are not Valid, or
  13379. currently hibernating. Fixes 12573; bugfix on 0.2.0.10-alpha.
  13380. o Major bugfixes (directory bandwidth performance):
  13381. - Don't flush the zlib buffer aggressively when compressing
  13382. directory information for clients. This should save about 7% of
  13383. the bandwidth currently used for compressed descriptors and
  13384. microdescriptors. Fixes bug 11787; bugfix on 0.1.1.23.
  13385. o Minor features (security, memory wiping):
  13386. - Ensure we securely wipe keys from memory after
  13387. crypto_digest_get_digest and init_curve25519_keypair_from_file
  13388. have finished using them. Resolves ticket 13477.
  13389. o Minor features (security, out-of-memory handling):
  13390. - When handling an out-of-memory condition, allocate less memory for
  13391. temporary data structures. Fixes issue 10115.
  13392. - When handling an out-of-memory condition, consider more types of
  13393. buffers, including those on directory connections, and zlib
  13394. buffers. Resolves ticket 11792.
  13395. o Minor features:
  13396. - When identity keypair is generated for first time, log a
  13397. congratulatory message that links to the new relay lifecycle
  13398. document. Implements feature 10427.
  13399. o Minor features (client):
  13400. - Clients are now willing to send optimistic data (before they
  13401. receive a 'connected' cell) to relays of any version. (Relays
  13402. without support for optimistic data are no longer supported on the
  13403. Tor network.) Resolves ticket 13153.
  13404. o Minor features (directory authorities):
  13405. - Don't list relays with a bandwidth estimate of 0 in the consensus.
  13406. Implements a feature proposed during discussion of bug 13000.
  13407. - In tor-gencert, report an error if the user provides the same
  13408. argument more than once.
  13409. - If a directory authority can't find a best consensus method in the
  13410. votes that it holds, it now falls back to its favorite consensus
  13411. method. Previously, it fell back to method 1. Neither of these is
  13412. likely to get enough signatures, but "fall back to favorite"
  13413. doesn't require us to maintain support an obsolete consensus
  13414. method. Implements part of proposal 215.
  13415. o Minor features (logging):
  13416. - On Unix-like systems, you can now use named pipes as the target of
  13417. the Log option, and other options that try to append to files.
  13418. Closes ticket 12061. Patch from "carlo von lynX".
  13419. - When opening a log file at startup, send it every log message that
  13420. we generated between startup and opening it. Previously, log
  13421. messages that were generated before opening the log file were only
  13422. logged to stdout. Closes ticket 6938.
  13423. - Add a TruncateLogFile option to overwrite logs instead of
  13424. appending to them. Closes ticket 5583.
  13425. o Minor features (portability, Solaris):
  13426. - Threads are no longer disabled by default on Solaris; we believe
  13427. that the versions of Solaris with broken threading support are all
  13428. obsolete by now. Resolves ticket 9495.
  13429. o Minor features (relay):
  13430. - Re-check our address after we detect a changed IP address from
  13431. getsockname(). This ensures that the controller command "GETINFO
  13432. address" will report the correct value. Resolves ticket 11582.
  13433. Patch from "ra".
  13434. - A new AccountingRule option lets Relays set whether they'd like
  13435. AccountingMax to be applied separately to inbound and outbound
  13436. traffic, or applied to the sum of inbound and outbound traffic.
  13437. Resolves ticket 961. Patch by "chobe".
  13438. o Minor features (testing networks):
  13439. - Add the TestingDirAuthVoteExit option, which lists nodes to assign
  13440. the "Exit" flag regardless of their uptime, bandwidth, or exit
  13441. policy. TestingTorNetwork must be set for this option to have any
  13442. effect. Previously, authorities would take up to 35 minutes to
  13443. give nodes the Exit flag in a test network. Partially implements
  13444. ticket 13161.
  13445. o Minor features (validation):
  13446. - Check all date/time values passed to tor_timegm and
  13447. parse_rfc1123_time for validity, taking leap years into account.
  13448. Improves HTTP header validation. Implemented with bug 13476.
  13449. - In correct_tm(), limit the range of values returned by system
  13450. localtime(_r) and gmtime(_r) to be between the years 1 and 8099.
  13451. This means we don't have to deal with negative or too large dates,
  13452. even if a clock is wrong. Otherwise we might fail to read a file
  13453. written by us which includes such a date. Fixes bug 13476.
  13454. o Minor bugfixes (bridge clients):
  13455. - When configured to use a bridge without an identity digest (not
  13456. recommended), avoid launching an extra channel to it when
  13457. bootstrapping. Fixes bug 7733; bugfix on 0.2.4.4-alpha.
  13458. o Minor bugfixes (bridges):
  13459. - When DisableNetwork is set, do not launch pluggable transport
  13460. plugins, and if any are running, terminate them. Fixes bug 13213;
  13461. bugfix on 0.2.3.6-alpha.
  13462. o Minor bugfixes (C correctness):
  13463. - Fix several instances of possible integer overflow/underflow/NaN.
  13464. Fixes bug 13104; bugfix on 0.2.3.1-alpha and later. Patches
  13465. from "teor".
  13466. - In circuit_build_times_calculate_timeout() in circuitstats.c,
  13467. avoid dividing by zero in the pareto calculations. This traps
  13468. under clang's "undefined-trap" sanitizer. Fixes bug 13290; bugfix
  13469. on 0.2.2.2-alpha.
  13470. - Fix an integer overflow in format_time_interval(). Fixes bug
  13471. 13393; bugfix on 0.2.0.10-alpha.
  13472. - Set the correct day of year value when the system's localtime(_r)
  13473. or gmtime(_r) functions fail to set struct tm. Not externally
  13474. visible. Fixes bug 13476; bugfix on 0.0.2pre14.
  13475. - Avoid unlikely signed integer overflow in tor_timegm on systems
  13476. with 32-bit time_t. Fixes bug 13476; bugfix on 0.0.2pre14.
  13477. o Minor bugfixes (client):
  13478. - Fix smartlist_choose_node_by_bandwidth() so that relays with the
  13479. BadExit flag are not considered worthy candidates. Fixes bug
  13480. 13066; bugfix on 0.1.2.3-alpha.
  13481. - Use the consensus schedule for downloading consensuses, and not
  13482. the generic schedule. Fixes bug 11679; bugfix on 0.2.2.6-alpha.
  13483. - Handle unsupported or malformed SOCKS5 requests properly by
  13484. responding with the appropriate error message before closing the
  13485. connection. Fixes bugs 12971 and 13314; bugfix on 0.0.2pre13.
  13486. o Minor bugfixes (client, torrc):
  13487. - Stop modifying the value of our DirReqStatistics torrc option just
  13488. because we're not a bridge or relay. This bug was causing Tor
  13489. Browser users to write "DirReqStatistics 0" in their torrc files
  13490. as if they had chosen to change the config. Fixes bug 4244; bugfix
  13491. on 0.2.3.1-alpha.
  13492. - When GeoIPExcludeUnknown is enabled, do not incorrectly decide
  13493. that our options have changed every time we SIGHUP. Fixes bug
  13494. 9801; bugfix on 0.2.4.10-alpha. Patch from "qwerty1".
  13495. o Minor bugfixes (controller):
  13496. - Return an error when the second or later arguments of the
  13497. "setevents" controller command are invalid events. Previously we
  13498. would return success while silently skipping invalid events. Fixes
  13499. bug 13205; bugfix on 0.2.3.2-alpha. Reported by "fpxnns".
  13500. o Minor bugfixes (directory system):
  13501. - Always believe that v3 directory authorities serve extra-info
  13502. documents, whether they advertise "caches-extra-info" or not.
  13503. Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
  13504. - When running as a v3 directory authority, advertise that you serve
  13505. extra-info documents so that clients who want them can find them
  13506. from you too. Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
  13507. - Check the BRIDGE_DIRINFO flag bitwise rather than using equality.
  13508. Previously, directories offering BRIDGE_DIRINFO and some other
  13509. flag (i.e. microdescriptors or extrainfo) would be ignored when
  13510. looking for bridges. Partially fixes bug 13163; bugfix
  13511. on 0.2.0.7-alpha.
  13512. o Minor bugfixes (networking):
  13513. - Check for orconns and use connection_or_close_for_error() rather
  13514. than connection_mark_for_close() directly in the getsockopt()
  13515. failure case of connection_handle_write_impl(). Fixes bug 11302;
  13516. bugfix on 0.2.4.4-alpha.
  13517. o Minor bugfixes (relay):
  13518. - When generating our family list, remove spaces from around the
  13519. entries. Fixes bug 12728; bugfix on 0.2.1.7-alpha.
  13520. - If our previous bandwidth estimate was 0 bytes, allow publishing a
  13521. new relay descriptor immediately. Fixes bug 13000; bugfix
  13522. on 0.1.1.6-alpha.
  13523. o Minor bugfixes (testing networks):
  13524. - Fix TestingDirAuthVoteGuard to properly give out Guard flags in a
  13525. testing network. Fixes bug 13064; bugfix on 0.2.5.2-alpha.
  13526. - Stop using the default authorities in networks which provide both
  13527. AlternateDirAuthority and AlternateBridgeAuthority. Partially
  13528. fixes bug 13163; bugfix on 0.2.0.13-alpha.
  13529. o Minor bugfixes (testing):
  13530. - Stop spawn test failures due to a race condition between the
  13531. SIGCHLD handler updating the process status, and the test reading
  13532. it. Fixes bug 13291; bugfix on 0.2.3.3-alpha.
  13533. o Minor bugfixes (testing, Windows):
  13534. - Avoid passing an extra backslash when creating a temporary
  13535. directory for running the unit tests on Windows. Fixes bug 12392;
  13536. bugfix on 0.2.2.25-alpha. Patch from Gisle Vanem.
  13537. o Minor bugfixes (windows):
  13538. - Remove code to special-case handling of NTE_BAD_KEYSET when
  13539. acquiring windows CryptoAPI context. This error can't actually
  13540. occur for the parameters we're providing. Fixes bug 10816; bugfix
  13541. on 0.0.2pre26.
  13542. o Minor bugfixes (zlib):
  13543. - Avoid truncating a zlib stream when trying to finalize it with an
  13544. empty output buffer. Fixes bug 11824; bugfix on 0.1.1.23.
  13545. o Build fixes:
  13546. - Allow our configure script to build correctly with autoconf 2.62
  13547. again. Fixes bug 12693; bugfix on 0.2.5.2-alpha.
  13548. - Improve the error message from ./configure to make it clear that
  13549. when asciidoc has not been found, the user will have to either add
  13550. --disable-asciidoc argument or install asciidoc. Resolves
  13551. ticket 13228.
  13552. o Code simplification and refactoring:
  13553. - Change the entry_is_live() function to take named bitfield
  13554. elements instead of an unnamed list of booleans. Closes
  13555. ticket 12202.
  13556. - Refactor and unit-test entry_is_time_to_retry() in entrynodes.c.
  13557. Resolves ticket 12205.
  13558. - Use calloc and reallocarray functions instead of multiply-
  13559. then-malloc. This makes it less likely for us to fall victim to an
  13560. integer overflow attack when allocating. Resolves ticket 12855.
  13561. - Use the standard macro name SIZE_MAX, instead of our
  13562. own SIZE_T_MAX.
  13563. - Document usage of the NO_DIRINFO and ALL_DIRINFO flags clearly in
  13564. functions which take them as arguments. Replace 0 with NO_DIRINFO
  13565. in a function call for clarity. Seeks to prevent future issues
  13566. like 13163.
  13567. - Avoid 4 null pointer errors under clang static analysis by using
  13568. tor_assert() to prove that the pointers aren't null. Fixes
  13569. bug 13284.
  13570. - Rework the API of policies_parse_exit_policy() to use a bitmask to
  13571. represent parsing options, instead of a confusing mess of
  13572. booleans. Resolves ticket 8197.
  13573. - Introduce a helper function to parse ExitPolicy in
  13574. or_options_t structure.
  13575. o Documentation:
  13576. - Add a doc/TUNING document with tips for handling large numbers of
  13577. TCP connections when running busy Tor relay. Update the warning
  13578. message to point to this file when running out of sockets
  13579. operating system is allowing to use simultaneously. Resolves
  13580. ticket 9708.
  13581. o Removed features:
  13582. - We no longer remind the user about configuration options that have
  13583. been obsolete since 0.2.3.x or earlier. Patch by Adrien Bak.
  13584. - Remove our old, non-weighted bandwidth-based node selection code.
  13585. Previously, we used it as a fallback when we couldn't perform
  13586. weighted bandwidth-based node selection. But that would only
  13587. happen in the cases where we had no consensus, or when we had a
  13588. consensus generated by buggy or ancient directory authorities. In
  13589. either case, it's better to use the more modern, better maintained
  13590. algorithm, with reasonable defaults for the weights. Closes
  13591. ticket 13126.
  13592. - Remove the --disable-curve25519 configure option. Relays and
  13593. clients now are required to support curve25519 and the
  13594. ntor handshake.
  13595. - The old "StrictEntryNodes" and "StrictExitNodes" options, which
  13596. used to be deprecated synonyms for "StrictNodes", are now marked
  13597. obsolete. Resolves ticket 12226.
  13598. - Clients don't understand the BadDirectory flag in the consensus
  13599. anymore, and ignore it.
  13600. o Testing:
  13601. - Refactor the function that chooses guard nodes so that it can more
  13602. easily be tested; write some tests for it.
  13603. - Fix and re-enable the fgets_eagain unit test. Fixes bug 12503;
  13604. bugfix on 0.2.3.1-alpha. Patch from "cypherpunks."
  13605. - Create unit tests for format_time_interval(). With bug 13393.
  13606. - Add unit tests for tor_timegm signed overflow, tor_timegm and
  13607. parse_rfc1123_time validity checks, correct_tm year clamping. Unit
  13608. tests (visible) fixes in bug 13476.
  13609. - Add a "coverage-html" make target to generate HTML-visualized
  13610. coverage results when building with --enable-coverage. (Requires
  13611. lcov.) Patch from Kevin Murray.
  13612. - Enable the backtrace handler (where supported) when running the
  13613. unit tests.
  13614. - Revise all unit tests that used the legacy test_* macros to
  13615. instead use the recommended tt_* macros. This patch was generated
  13616. with coccinelle, to avoid manual errors. Closes ticket 13119.
  13617. o Distribution (systemd):
  13618. - systemd unit file: only allow tor to write to /var/lib/tor and
  13619. /var/log/tor. The rest of the filesystem is accessible for reading
  13620. only. Patch by intrigeri; resolves ticket 12751.
  13621. - systemd unit file: ensure that the process and all its children
  13622. can never gain new privileges. Patch by intrigeri; resolves
  13623. ticket 12939.
  13624. - systemd unit file: set up /var/run/tor as writable for the Tor
  13625. service. Patch by intrigeri; resolves ticket 13196.
  13626. o Removed features (directory authorities):
  13627. - Remove code that prevented authorities from listing Tor relays
  13628. affected by CVE-2011-2769 as guards. These relays are already
  13629. rejected altogether due to the minimum version requirement of
  13630. 0.2.3.16-alpha. Closes ticket 13152.
  13631. - The "AuthDirRejectUnlisted" option no longer has any effect, as
  13632. the fingerprints file (approved-routers) has been deprecated.
  13633. - Directory authorities do not support being Naming dirauths anymore.
  13634. The "NamingAuthoritativeDir" config option is now obsolete.
  13635. - Directory authorities do not support giving out the BadDirectory
  13636. flag anymore.
  13637. - Directory authorities no longer advertise or support consensus
  13638. methods 1 through 12 inclusive. These consensus methods were
  13639. obsolete and/or insecure: maintaining the ability to support them
  13640. served no good purpose. Implements part of proposal 215; closes
  13641. ticket 10163.
  13642. o Testing (test-network.sh):
  13643. - Stop using "echo -n", as some shells' built-in echo doesn't
  13644. support "-n". Instead, use "/bin/echo -n". Partially fixes
  13645. bug 13161.
  13646. - Stop an apparent test-network hang when used with make -j2. Fixes
  13647. bug 13331.
  13648. - Add a --delay option to test-network.sh, which configures the
  13649. delay before the chutney network tests for data transmission.
  13650. Partially implements ticket 13161.
  13651. Changes in version 0.2.5.10 - 2014-10-24
  13652. Tor 0.2.5.10 is the first stable release in the 0.2.5 series.
  13653. It adds several new security features, including improved
  13654. denial-of-service resistance for relays, new compiler hardening
  13655. options, and a system-call sandbox for hardened installations on Linux
  13656. (requires seccomp2). The controller protocol has several new features,
  13657. resolving IPv6 addresses should work better than before, and relays
  13658. should be a little more CPU-efficient. We've added support for more
  13659. OpenBSD and FreeBSD transparent proxy types. We've improved the build
  13660. system and testing infrastructure to allow unit testing of more parts
  13661. of the Tor codebase. Finally, we've addressed several nagging pluggable
  13662. transport usability issues, and included numerous other small bugfixes
  13663. and features mentioned below.
  13664. This release marks end-of-life for Tor 0.2.3.x; those Tor versions
  13665. have accumulated many known flaws; everyone should upgrade.
  13666. o Deprecated versions:
  13667. - Tor 0.2.3.x has reached end-of-life; it has received no patches or
  13668. attention for some while.
  13669. Changes in version 0.2.5.9-rc - 2014-10-20
  13670. Tor 0.2.5.9-rc is the third release candidate for the Tor 0.2.5.x
  13671. series. It disables SSL3 in response to the recent "POODLE" attack
  13672. (even though POODLE does not affect Tor). It also works around a crash
  13673. bug caused by some operating systems' response to the "POODLE" attack
  13674. (which does affect Tor). It also contains a few miscellaneous fixes.
  13675. o Major security fixes:
  13676. - Disable support for SSLv3. All versions of OpenSSL in use with Tor
  13677. today support TLS 1.0 or later, so we can safely turn off support
  13678. for this old (and insecure) protocol. Fixes bug 13426.
  13679. o Major bugfixes (openssl bug workaround):
  13680. - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
  13681. 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
  13682. 13471. This is a workaround for an OpenSSL bug.
  13683. o Minor bugfixes:
  13684. - Disable the sandbox name resolver cache when running tor-resolve:
  13685. tor-resolve doesn't use the sandbox code, and turning it on was
  13686. breaking attempts to do tor-resolve on a non-default server on
  13687. Linux. Fixes bug 13295; bugfix on 0.2.5.3-alpha.
  13688. o Compilation fixes:
  13689. - Build and run correctly on systems like OpenBSD-current that have
  13690. patched OpenSSL to remove get_cipher_by_char and/or its
  13691. implementations. Fixes issue 13325.
  13692. o Downgraded warnings:
  13693. - Downgrade the severity of the 'unexpected sendme cell from client'
  13694. from 'warn' to 'protocol warning'. Closes ticket 8093.
  13695. Changes in version 0.2.4.25 - 2014-10-20
  13696. Tor 0.2.4.25 disables SSL3 in response to the recent "POODLE" attack
  13697. (even though POODLE does not affect Tor). It also works around a crash
  13698. bug caused by some operating systems' response to the "POODLE" attack
  13699. (which does affect Tor).
  13700. o Major security fixes (also in 0.2.5.9-rc):
  13701. - Disable support for SSLv3. All versions of OpenSSL in use with Tor
  13702. today support TLS 1.0 or later, so we can safely turn off support
  13703. for this old (and insecure) protocol. Fixes bug 13426.
  13704. o Major bugfixes (openssl bug workaround, also in 0.2.5.9-rc):
  13705. - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
  13706. 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
  13707. 13471. This is a workaround for an OpenSSL bug.
  13708. Changes in version 0.2.5.8-rc - 2014-09-22
  13709. Tor 0.2.5.8-rc is the second release candidate for the Tor 0.2.5.x
  13710. series. It fixes a bug that affects consistency and speed when
  13711. connecting to hidden services, and it updates the location of one of
  13712. the directory authorities.
  13713. o Major bugfixes:
  13714. - Clients now send the correct address for their chosen rendezvous
  13715. point when trying to access a hidden service. They used to send
  13716. the wrong address, which would still work some of the time because
  13717. they also sent the identity digest of the rendezvous point, and if
  13718. the hidden service happened to try connecting to the rendezvous
  13719. point from a relay that already had a connection open to it,
  13720. the relay would reuse that connection. Now connections to hidden
  13721. services should be more robust and faster. Also, this bug meant
  13722. that clients were leaking to the hidden service whether they were
  13723. on a little-endian (common) or big-endian (rare) system, which for
  13724. some users might have reduced their anonymity. Fixes bug 13151;
  13725. bugfix on 0.2.1.5-alpha.
  13726. o Directory authority changes:
  13727. - Change IP address for gabelmoo (v3 directory authority).
  13728. Changes in version 0.2.4.24 - 2014-09-22
  13729. Tor 0.2.4.24 fixes a bug that affects consistency and speed when
  13730. connecting to hidden services, and it updates the location of one of
  13731. the directory authorities.
  13732. o Major bugfixes:
  13733. - Clients now send the correct address for their chosen rendezvous
  13734. point when trying to access a hidden service. They used to send
  13735. the wrong address, which would still work some of the time because
  13736. they also sent the identity digest of the rendezvous point, and if
  13737. the hidden service happened to try connecting to the rendezvous
  13738. point from a relay that already had a connection open to it,
  13739. the relay would reuse that connection. Now connections to hidden
  13740. services should be more robust and faster. Also, this bug meant
  13741. that clients were leaking to the hidden service whether they were
  13742. on a little-endian (common) or big-endian (rare) system, which for
  13743. some users might have reduced their anonymity. Fixes bug 13151;
  13744. bugfix on 0.2.1.5-alpha.
  13745. o Directory authority changes:
  13746. - Change IP address for gabelmoo (v3 directory authority).
  13747. o Minor features (geoip):
  13748. - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
  13749. Country database.
  13750. Changes in version 0.2.5.7-rc - 2014-09-11
  13751. Tor 0.2.5.7-rc fixes several regressions from earlier in the 0.2.5.x
  13752. release series, and some long-standing bugs related to ORPort reachability
  13753. testing and failure to send CREATE cells. It is the first release
  13754. candidate for the Tor 0.2.5.x series.
  13755. o Major bugfixes (client, startup):
  13756. - Start making circuits as soon as DisabledNetwork is turned off.
  13757. When Tor started with DisabledNetwork set, it would correctly
  13758. conclude that it shouldn't build circuits, but it would mistakenly
  13759. cache this conclusion, and continue believing it even when
  13760. DisableNetwork is set to 0. Fixes the bug introduced by the fix
  13761. for bug 11200; bugfix on 0.2.5.4-alpha.
  13762. - Resume expanding abbreviations for command-line options. The fix
  13763. for bug 4647 accidentally removed our hack from bug 586 that
  13764. rewrote HashedControlPassword to __HashedControlSessionPassword
  13765. when it appears on the commandline (which allowed the user to set
  13766. her own HashedControlPassword in the torrc file while the
  13767. controller generates a fresh session password for each run). Fixes
  13768. bug 12948; bugfix on 0.2.5.1-alpha.
  13769. - Warn about attempts to run hidden services and relays in the same
  13770. process: that's probably not a good idea. Closes ticket 12908.
  13771. o Major bugfixes (relay):
  13772. - Avoid queuing or sending destroy cells for circuit ID zero when we
  13773. fail to send a CREATE cell. Fixes bug 12848; bugfix on 0.0.8pre1.
  13774. Found and fixed by "cypherpunks".
  13775. - Fix ORPort reachability detection on relays running behind a
  13776. proxy, by correctly updating the "local" mark on the controlling
  13777. channel when changing the address of an or_connection_t after the
  13778. handshake. Fixes bug 12160; bugfix on 0.2.4.4-alpha.
  13779. o Minor features (bridge):
  13780. - Add an ExtORPortCookieAuthFileGroupReadable option to make the
  13781. cookie file for the ExtORPort g+r by default.
  13782. o Minor features (geoip):
  13783. - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
  13784. Country database.
  13785. o Minor bugfixes (logging):
  13786. - Reduce the log severity of the "Pluggable transport proxy does not
  13787. provide any needed transports and will not be launched." message,
  13788. since Tor Browser includes several ClientTransportPlugin lines in
  13789. its torrc-defaults file, leading every Tor Browser user who looks
  13790. at her logs to see these notices and wonder if they're dangerous.
  13791. Resolves bug 13124; bugfix on 0.2.5.3-alpha.
  13792. - Downgrade "Unexpected onionskin length after decryption" warning
  13793. to a protocol-warn, since there's nothing relay operators can do
  13794. about a client that sends them a malformed create cell. Resolves
  13795. bug 12996; bugfix on 0.0.6rc1.
  13796. - Log more specific warnings when we get an ESTABLISH_RENDEZVOUS
  13797. cell on a cannibalized or non-OR circuit. Resolves ticket 12997.
  13798. - When logging information about an EXTEND2 or EXTENDED2 cell, log
  13799. their names correctly. Fixes part of bug 12700; bugfix
  13800. on 0.2.4.8-alpha.
  13801. - When logging information about a relay cell whose command we don't
  13802. recognize, log its command as an integer. Fixes part of bug 12700;
  13803. bugfix on 0.2.1.10-alpha.
  13804. - Escape all strings from the directory connection before logging
  13805. them. Fixes bug 13071; bugfix on 0.1.1.15. Patch from "teor".
  13806. o Minor bugfixes (controller):
  13807. - Restore the functionality of CookieAuthFileGroupReadable. Fixes
  13808. bug 12864; bugfix on 0.2.5.1-alpha.
  13809. - Actually send TRANSPORT_LAUNCHED and HS_DESC events to
  13810. controllers. Fixes bug 13085; bugfix on 0.2.5.1-alpha. Patch
  13811. by "teor".
  13812. o Minor bugfixes (compilation):
  13813. - Fix compilation of test.h with MSVC. Patch from Gisle Vanem;
  13814. bugfix on 0.2.5.5-alpha.
  13815. - Make the nmake make files work again. Fixes bug 13081. Bugfix on
  13816. 0.2.5.1-alpha. Patch from "NewEraCracker".
  13817. - In routerlist_assert_ok(), don't take the address of a
  13818. routerinfo's cache_info member unless that routerinfo is non-NULL.
  13819. Fixes bug 13096; bugfix on 0.1.1.9-alpha. Patch by "teor".
  13820. - Fix a large number of false positive warnings from the clang
  13821. analyzer static analysis tool. This should make real warnings
  13822. easier for clang analyzer to find. Patch from "teor". Closes
  13823. ticket 13036.
  13824. o Distribution (systemd):
  13825. - Verify configuration file via ExecStartPre in the systemd unit
  13826. file. Patch from intrigeri; resolves ticket 12730.
  13827. - Explicitly disable RunAsDaemon in the systemd unit file. Our
  13828. current systemd unit uses "Type = simple", so systemd does not
  13829. expect tor to fork. If the user has "RunAsDaemon 1" in their
  13830. torrc, then things won't work as expected. This is e.g. the case
  13831. on Debian (and derivatives), since there we pass "--defaults-torrc
  13832. /usr/share/tor/tor-service-defaults-torrc" (that contains
  13833. "RunAsDaemon 1") by default. Patch by intrigeri; resolves
  13834. ticket 12731.
  13835. o Documentation:
  13836. - Adjust the URLs in the README to refer to the new locations of
  13837. several documents on the website. Fixes bug 12830. Patch from
  13838. Matt Pagan.
  13839. - Document 'reject6' and 'accept6' ExitPolicy entries. Resolves
  13840. ticket 12878.
  13841. Changes in version 0.2.5.6-alpha - 2014-07-28
  13842. Tor 0.2.5.6-alpha brings us a big step closer to slowing down the
  13843. risk from guard rotation, and fixes a variety of other issues to get
  13844. us closer to a release candidate.
  13845. o Major features (also in 0.2.4.23):
  13846. - Make the number of entry guards configurable via a new
  13847. NumEntryGuards consensus parameter, and the number of directory
  13848. guards configurable via a new NumDirectoryGuards consensus
  13849. parameter. Implements ticket 12688.
  13850. o Major bugfixes (also in 0.2.4.23):
  13851. - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
  13852. implementation that caused incorrect results on 32-bit
  13853. implementations when certain malformed inputs were used along with
  13854. a small class of private ntor keys. This bug does not currently
  13855. appear to allow an attacker to learn private keys or impersonate a
  13856. Tor server, but it could provide a means to distinguish 32-bit Tor
  13857. implementations from 64-bit Tor implementations. Fixes bug 12694;
  13858. bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
  13859. Adam Langley.
  13860. o Major bugfixes:
  13861. - Perform circuit cleanup operations even when circuit
  13862. construction operations are disabled (because the network is
  13863. disabled, or because there isn't enough directory information).
  13864. Previously, when we were not building predictive circuits, we
  13865. were not closing expired circuits either. Fixes bug 8387; bugfix on
  13866. 0.1.1.11-alpha. This bug became visible in 0.2.4.10-alpha when we
  13867. became more strict about when we have "enough directory information
  13868. to build circuits".
  13869. o Minor features:
  13870. - Authorities now assign the Guard flag to the fastest 25% of the
  13871. network (it used to be the fastest 50%). Also raise the consensus
  13872. weight that guarantees the Guard flag from 250 to 2000. For the
  13873. current network, this results in about 1100 guards, down from 2500.
  13874. This step paves the way for moving the number of entry guards
  13875. down to 1 (proposal 236) while still providing reasonable expected
  13876. performance for most users. Implements ticket 12690.
  13877. - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
  13878. Country database.
  13879. - Slightly enhance the diagnostic message for bug 12184.
  13880. o Minor bugfixes (also in 0.2.4.23):
  13881. - Warn and drop the circuit if we receive an inbound 'relay early'
  13882. cell. Those used to be normal to receive on hidden service circuits
  13883. due to bug 1038, but the buggy Tor versions are long gone from
  13884. the network so we can afford to resume watching for them. Resolves
  13885. the rest of bug 1038; bugfix on 0.2.1.19.
  13886. - Correct a confusing error message when trying to extend a circuit
  13887. via the control protocol but we don't know a descriptor or
  13888. microdescriptor for one of the specified relays. Fixes bug 12718;
  13889. bugfix on 0.2.3.1-alpha.
  13890. o Minor bugfixes:
  13891. - Fix compilation when building with bufferevents enabled. (This
  13892. configuration is still not expected to work, however.)
  13893. Fixes bugs 12438, 12474, 11578; bugfixes on 0.2.5.1-alpha and
  13894. 0.2.5.3-alpha. Patches from Anthony G. Basile and Sathyanarayanan
  13895. Gunasekaran.
  13896. - Compile correctly with builds and forks of OpenSSL (such as
  13897. LibreSSL) that disable compression. Fixes bug 12602; bugfix on
  13898. 0.2.1.1-alpha. Patch from "dhill".
  13899. Changes in version 0.2.4.23 - 2014-07-28
  13900. Tor 0.2.4.23 brings us a big step closer to slowing down the risk from
  13901. guard rotation, and also backports several important fixes from the
  13902. Tor 0.2.5 alpha release series.
  13903. o Major features:
  13904. - Clients now look at the "usecreatefast" consensus parameter to
  13905. decide whether to use CREATE_FAST or CREATE cells for the first hop
  13906. of their circuit. This approach can improve security on connections
  13907. where Tor's circuit handshake is stronger than the available TLS
  13908. connection security levels, but the tradeoff is more computational
  13909. load on guard relays. Implements proposal 221. Resolves ticket 9386.
  13910. - Make the number of entry guards configurable via a new
  13911. NumEntryGuards consensus parameter, and the number of directory
  13912. guards configurable via a new NumDirectoryGuards consensus
  13913. parameter. Implements ticket 12688.
  13914. o Major bugfixes:
  13915. - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
  13916. implementation that caused incorrect results on 32-bit
  13917. implementations when certain malformed inputs were used along with
  13918. a small class of private ntor keys. This bug does not currently
  13919. appear to allow an attacker to learn private keys or impersonate a
  13920. Tor server, but it could provide a means to distinguish 32-bit Tor
  13921. implementations from 64-bit Tor implementations. Fixes bug 12694;
  13922. bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
  13923. Adam Langley.
  13924. o Minor bugfixes:
  13925. - Warn and drop the circuit if we receive an inbound 'relay early'
  13926. cell. Those used to be normal to receive on hidden service circuits
  13927. due to bug 1038, but the buggy Tor versions are long gone from
  13928. the network so we can afford to resume watching for them. Resolves
  13929. the rest of bug 1038; bugfix on 0.2.1.19.
  13930. - Correct a confusing error message when trying to extend a circuit
  13931. via the control protocol but we don't know a descriptor or
  13932. microdescriptor for one of the specified relays. Fixes bug 12718;
  13933. bugfix on 0.2.3.1-alpha.
  13934. - Avoid an illegal read from stack when initializing the TLS
  13935. module using a version of OpenSSL without all of the ciphers
  13936. used by the v2 link handshake. Fixes bug 12227; bugfix on
  13937. 0.2.4.8-alpha. Found by "starlight".
  13938. o Minor features:
  13939. - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
  13940. Country database.
  13941. Changes in version 0.2.5.5-alpha - 2014-06-18
  13942. Tor 0.2.5.5-alpha fixes a wide variety of remaining issues in the Tor
  13943. 0.2.5.x release series, including a couple of DoS issues, some
  13944. performance regressions, a large number of bugs affecting the Linux
  13945. seccomp2 sandbox code, and various other bugfixes. It also adds
  13946. diagnostic bugfixes for a few tricky issues that we're trying to
  13947. track down.
  13948. o Major features (security, traffic analysis resistance):
  13949. - Several major improvements to the algorithm used to decide when to
  13950. close TLS connections. Previous versions of Tor closed connections
  13951. at a fixed interval after the last time a non-padding cell was
  13952. sent over the connection, regardless of the target of the
  13953. connection. Now, we randomize the intervals by adding up to 50% of
  13954. their base value, we measure the length of time since connection
  13955. last had at least one circuit, and we allow connections to known
  13956. ORs to remain open a little longer (15 minutes instead of 3
  13957. minutes minimum). These changes should improve Tor's resistance
  13958. against some kinds of traffic analysis, and lower some overhead
  13959. from needlessly closed connections. Fixes ticket 6799.
  13960. Incidentally fixes ticket 12023; bugfix on 0.2.5.1-alpha.
  13961. o Major bugfixes (security, OOM, new since 0.2.5.4-alpha, also in 0.2.4.22):
  13962. - Fix a memory leak that could occur if a microdescriptor parse
  13963. fails during the tokenizing step. This bug could enable a memory
  13964. exhaustion attack by directory servers. Fixes bug 11649; bugfix
  13965. on 0.2.2.6-alpha.
  13966. o Major bugfixes (security, directory authorities):
  13967. - Directory authorities now include a digest of each relay's
  13968. identity key as a part of its microdescriptor.
  13969. This is a workaround for bug 11743 (reported by "cypherpunks"),
  13970. where Tor clients do not support receiving multiple
  13971. microdescriptors with the same SHA256 digest in the same
  13972. consensus. When clients receive a consensus like this, they only
  13973. use one of the relays. Without this fix, a hostile relay could
  13974. selectively disable some client use of target relays by
  13975. constructing a router descriptor with a different identity and the
  13976. same microdescriptor parameters and getting the authorities to
  13977. list it in a microdescriptor consensus. This fix prevents an
  13978. attacker from causing a microdescriptor collision, because the
  13979. router's identity is not forgeable.
  13980. o Major bugfixes (relay):
  13981. - Use a direct dirport connection when uploading non-anonymous
  13982. descriptors to the directory authorities. Previously, relays would
  13983. incorrectly use tunnel connections under a fairly wide variety of
  13984. circumstances. Fixes bug 11469; bugfix on 0.2.4.3-alpha.
  13985. - When a circuit accidentally has the same circuit ID for its
  13986. forward and reverse direction, correctly detect the direction of
  13987. cells using that circuit. Previously, this bug made roughly one
  13988. circuit in a million non-functional. Fixes bug 12195; this is a
  13989. bugfix on every version of Tor.
  13990. o Major bugfixes (client, pluggable transports):
  13991. - When managing pluggable transports, use OS notification facilities
  13992. to learn if they have crashed, and don't attempt to kill any
  13993. process that has already exited. Fixes bug 8746; bugfix
  13994. on 0.2.3.6-alpha.
  13995. o Minor features (diagnostic):
  13996. - When logging a warning because of bug 7164, additionally check the
  13997. hash table for consistency (as proposed on ticket 11737). This may
  13998. help diagnose bug 7164.
  13999. - When we log a heartbeat, log how many one-hop circuits we have
  14000. that are at least 30 minutes old, and log status information about
  14001. a few of them. This is an attempt to track down bug 8387.
  14002. - When encountering an unexpected CR while writing text to a file on
  14003. Windows, log the name of the file. Should help diagnosing
  14004. bug 11233.
  14005. - Give more specific warnings when a client notices that an onion
  14006. handshake has failed. Fixes ticket 9635.
  14007. - Add significant new logging code to attempt to diagnose bug 12184,
  14008. where relays seem to run out of available circuit IDs.
  14009. - Improve the diagnostic log message for bug 8387 even further to
  14010. try to improve our odds of figuring out why one-hop directory
  14011. circuits sometimes do not get closed.
  14012. o Minor features (security, memory management):
  14013. - Memory allocation tricks (mempools and buffer freelists) are now
  14014. disabled by default. You can turn them back on with
  14015. --enable-mempools and --enable-buf-freelists respectively. We're
  14016. disabling these features because malloc performance is good enough
  14017. on most platforms, and a similar feature in OpenSSL exacerbated
  14018. exploitation of the Heartbleed attack. Resolves ticket 11476.
  14019. o Minor features (security):
  14020. - Apply the secure SipHash-2-4 function to the hash table mapping
  14021. circuit IDs and channels to circuits. We missed this one when we
  14022. were converting all the other hash functions to use SipHash back
  14023. in 0.2.5.3-alpha. Resolves ticket 11750.
  14024. o Minor features (build):
  14025. - The configure script has a --disable-seccomp option to turn off
  14026. support for libseccomp on systems that have it, in case it (or
  14027. Tor's use of it) is broken. Resolves ticket 11628.
  14028. o Minor features (other):
  14029. - Update geoip and geoip6 to the June 4 2014 Maxmind GeoLite2
  14030. Country database.
  14031. o Minor bugfixes (security, new since 0.2.5.4-alpha, also in 0.2.4.22):
  14032. - When running a hidden service, do not allow TunneledDirConns 0;
  14033. this will keep the hidden service from running, and also
  14034. make it publish its descriptors directly over HTTP. Fixes bug 10849;
  14035. bugfix on 0.2.1.1-alpha.
  14036. o Minor bugfixes (performance):
  14037. - Avoid a bug where every successful connection made us recompute
  14038. the flag telling us whether we have sufficient information to
  14039. build circuits. Previously, we would forget our cached value
  14040. whenever we successfully opened a channel (or marked a router as
  14041. running or not running for any other reason), regardless of
  14042. whether we had previously believed the router to be running. This
  14043. forced us to run an expensive update operation far too often.
  14044. Fixes bug 12170; bugfix on 0.1.2.1-alpha.
  14045. - Avoid using tor_memeq() for checking relay cell integrity. This
  14046. removes a possible performance bottleneck. Fixes part of bug
  14047. 12169; bugfix on 0.2.1.31.
  14048. o Minor bugfixes (compilation):
  14049. - Fix compilation of test_status.c when building with MVSC. Bugfix
  14050. on 0.2.5.4-alpha. Patch from Gisle Vanem.
  14051. - Resolve GCC complaints on OpenBSD about discarding constness in
  14052. TO_{ORIGIN,OR}_CIRCUIT functions. Fixes part of bug 11633; bugfix
  14053. on 0.1.1.23. Patch from Dana Koch.
  14054. - Resolve clang complaints on OpenBSD with -Wshorten-64-to-32 due to
  14055. treatment of long and time_t as comparable types. Fixes part of
  14056. bug 11633. Patch from Dana Koch.
  14057. - Make Tor compile correctly with --disable-buf-freelists. Fixes bug
  14058. 11623; bugfix on 0.2.5.3-alpha.
  14059. - When deciding whether to build the 64-bit curve25519
  14060. implementation, detect platforms where we can compile 128-bit
  14061. arithmetic but cannot link it. Fixes bug 11729; bugfix on
  14062. 0.2.4.8-alpha. Patch from "conradev".
  14063. - Fix compilation when DNS_CACHE_DEBUG is enabled. Fixes bug 11761;
  14064. bugfix on 0.2.3.13-alpha. Found by "cypherpunks".
  14065. - Fix compilation with dmalloc. Fixes bug 11605; bugfix
  14066. on 0.2.4.10-alpha.
  14067. o Minor bugfixes (Directory server):
  14068. - When sending a compressed set of descriptors or microdescriptors,
  14069. make sure to finalize the zlib stream. Previously, we would write
  14070. all the compressed data, but if the last descriptor we wanted to
  14071. send was missing or too old, we would not mark the stream as
  14072. finished. This caused problems for decompression tools. Fixes bug
  14073. 11648; bugfix on 0.1.1.23.
  14074. o Minor bugfixes (Linux seccomp sandbox):
  14075. - Make the seccomp sandbox code compile under ARM Linux. Fixes bug
  14076. 11622; bugfix on 0.2.5.1-alpha.
  14077. - Avoid crashing when re-opening listener ports with the seccomp
  14078. sandbox active. Fixes bug 12115; bugfix on 0.2.5.1-alpha.
  14079. - Avoid crashing with the seccomp sandbox enabled along with
  14080. ConstrainedSockets. Fixes bug 12139; bugfix on 0.2.5.1-alpha.
  14081. - When we receive a SIGHUP with the sandbox enabled, correctly
  14082. support rotating our log files. Fixes bug 12032; bugfix
  14083. on 0.2.5.1-alpha.
  14084. - Avoid crash when running with sandboxing enabled and
  14085. DirReqStatistics not disabled. Fixes bug 12035; bugfix
  14086. on 0.2.5.1-alpha.
  14087. - Fix a "BUG" warning when trying to write bridge-stats files with
  14088. the Linux syscall sandbox filter enabled. Fixes bug 12041; bugfix
  14089. on 0.2.5.1-alpha.
  14090. - Prevent the sandbox from crashing on startup when run with the
  14091. --enable-expensive-hardening configuration option. Fixes bug
  14092. 11477; bugfix on 0.2.5.4-alpha.
  14093. - When running with DirPortFrontPage and sandboxing both enabled,
  14094. reload the DirPortFrontPage correctly when restarting. Fixes bug
  14095. 12028; bugfix on 0.2.5.1-alpha.
  14096. - Don't try to enable the sandbox when using the Tor binary to check
  14097. its configuration, hash a passphrase, or so on. Doing so was
  14098. crashing on startup for some users. Fixes bug 11609; bugfix
  14099. on 0.2.5.1-alpha.
  14100. - Avoid warnings when running with sandboxing and node statistics
  14101. enabled at the same time. Fixes part of 12064; bugfix on
  14102. 0.2.5.1-alpha. Patch from Michael Wolf.
  14103. - Avoid warnings when running with sandboxing enabled at the same
  14104. time as cookie authentication, hidden services, or directory
  14105. authority voting. Fixes part of 12064; bugfix on 0.2.5.1-alpha.
  14106. - Do not allow options that require calls to exec to be enabled
  14107. alongside the seccomp2 sandbox: they will inevitably crash. Fixes
  14108. bug 12043; bugfix on 0.2.5.1-alpha.
  14109. - Handle failures in getpwnam()/getpwuid() when running with the
  14110. User option set and the Linux syscall sandbox enabled. Fixes bug
  14111. 11946; bugfix on 0.2.5.1-alpha.
  14112. - Refactor the getaddrinfo workaround that the seccomp sandbox uses
  14113. to avoid calling getaddrinfo() after installing the sandbox
  14114. filters. Previously, it preloaded a cache with the IPv4 address
  14115. for our hostname, and nothing else. Now, it loads the cache with
  14116. every address that it used to initialize the Tor process. Fixes
  14117. bug 11970; bugfix on 0.2.5.1-alpha.
  14118. o Minor bugfixes (pluggable transports):
  14119. - Enable the ExtORPortCookieAuthFile option, to allow changing the
  14120. default location of the authentication token for the extended OR
  14121. Port as used by sever-side pluggable transports. We had
  14122. implemented this option before, but the code to make it settable
  14123. had been omitted. Fixes bug 11635; bugfix on 0.2.5.1-alpha.
  14124. - Avoid another 60-second delay when starting Tor in a pluggable-
  14125. transport-using configuration when we already have cached
  14126. descriptors for our bridges. Fixes bug 11965; bugfix
  14127. on 0.2.3.6-alpha.
  14128. o Minor bugfixes (client):
  14129. - Avoid "Tried to open a socket with DisableNetwork set" warnings
  14130. when starting a client with bridges configured and DisableNetwork
  14131. set. (Tor launcher starts Tor with DisableNetwork set the first
  14132. time it runs.) Fixes bug 10405; bugfix on 0.2.3.9-alpha.
  14133. o Minor bugfixes (testing):
  14134. - The Python parts of the test scripts now work on Python 3 as well
  14135. as Python 2, so systems where '/usr/bin/python' is Python 3 will
  14136. no longer have the tests break. Fixes bug 11608; bugfix
  14137. on 0.2.5.2-alpha.
  14138. - When looking for versions of python that we could run the tests
  14139. with, check for "python2.7" and "python3.3"; previously we were
  14140. only looking for "python", "python2", and "python3". Patch from
  14141. Dana Koch. Fixes bug 11632; bugfix on 0.2.5.2-alpha.
  14142. - Fix all valgrind warnings produced by the unit tests. There were
  14143. over a thousand memory leak warnings previously, mostly produced
  14144. by forgetting to free things in the unit test code. Fixes bug
  14145. 11618, bugfixes on many versions of Tor.
  14146. o Minor bugfixes (tor-fw-helper):
  14147. - Give a correct log message when tor-fw-helper fails to launch.
  14148. (Previously, we would say something like "tor-fw-helper sent us a
  14149. string we could not parse".) Fixes bug 9781; bugfix
  14150. on 0.2.4.2-alpha.
  14151. o Minor bugfixes (relay, threading):
  14152. - Check return code on spawn_func() in cpuworker code, so that we
  14153. don't think we've spawned a nonworking cpuworker and write junk to
  14154. it forever. Fix related to bug 4345; bugfix on all released Tor
  14155. versions. Found by "skruffy".
  14156. - Use a pthread_attr to make sure that spawn_func() cannot return an
  14157. error while at the same time launching a thread. Fix related to
  14158. bug 4345; bugfix on all released Tor versions. Reported
  14159. by "cypherpunks".
  14160. o Minor bugfixes (relay, oom prevention):
  14161. - Correctly detect the total available system memory. We tried to do
  14162. this in 0.2.5.4-alpha, but the code was set up to always return an
  14163. error value, even on success. Fixes bug 11805; bugfix
  14164. on 0.2.5.4-alpha.
  14165. o Minor bugfixes (relay, other):
  14166. - We now drop CREATE cells for already-existent circuit IDs and for
  14167. zero-valued circuit IDs, regardless of other factors that might
  14168. otherwise have called for DESTROY cells. Fixes bug 12191; bugfix
  14169. on 0.0.8pre1.
  14170. - Avoid an illegal read from stack when initializing the TLS module
  14171. using a version of OpenSSL without all of the ciphers used by the
  14172. v2 link handshake. Fixes bug 12227; bugfix on 0.2.4.8-alpha. Found
  14173. by "starlight".
  14174. - When rejecting DATA cells for stream_id zero, still count them
  14175. against the circuit's deliver window so that we don't fail to send
  14176. a SENDME. Fixes bug 11246; bugfix on 0.2.4.10-alpha.
  14177. o Minor bugfixes (logging):
  14178. - Fix a misformatted log message about delayed directory fetches.
  14179. Fixes bug 11654; bugfix on 0.2.5.3-alpha.
  14180. - Squelch a spurious LD_BUG message "No origin circuit for
  14181. successful SOCKS stream" in certain hidden service failure cases;
  14182. fixes bug 10616.
  14183. o Distribution:
  14184. - Include a tor.service file in contrib/dist for use with systemd.
  14185. Some distributions will be able to use this file unmodified;
  14186. others will need to tweak it, or write their own. Patch from Jamie
  14187. Nguyen; resolves ticket 8368.
  14188. o Documentation:
  14189. - Clean up several option names in the manpage to match their real
  14190. names, add the missing documentation for a couple of testing and
  14191. directory authority options, remove the documentation for a
  14192. V2-directory fetching option that no longer exists. Resolves
  14193. ticket 11634.
  14194. - Correct the documentation so that it lists the correct directory
  14195. for the stats files. (They are in a subdirectory called "stats",
  14196. not "status".)
  14197. - In the manpage, move more authority-only options into the
  14198. directory authority section so that operators of regular directory
  14199. caches don't get confused.
  14200. o Package cleanup:
  14201. - The contrib directory has been sorted and tidied. Before, it was
  14202. an unsorted dumping ground for useful and not-so-useful things.
  14203. Now, it is divided based on functionality, and the items which
  14204. seemed to be nonfunctional or useless have been removed. Resolves
  14205. ticket 8966; based on patches from "rl1987".
  14206. o Removed code:
  14207. - Remove /tor/dbg-stability.txt URL that was meant to help debug WFU
  14208. and MTBF calculations, but that nobody was using. Fixes ticket 11742.
  14209. - The TunnelDirConns and PreferTunnelledDirConns options no longer
  14210. exist; tunneled directory connections have been available since
  14211. 0.1.2.5-alpha, and turning them off is not a good idea. This is a
  14212. brute-force fix for 10849, where "TunnelDirConns 0" would break
  14213. hidden services.
  14214. Changes in version 0.2.4.22 - 2014-05-16
  14215. Tor 0.2.4.22 backports numerous high-priority fixes from the Tor 0.2.5
  14216. alpha release series. These include blocking all authority signing
  14217. keys that may have been affected by the OpenSSL "heartbleed" bug,
  14218. choosing a far more secure set of TLS ciphersuites by default, closing
  14219. a couple of memory leaks that could be used to run a target relay out
  14220. of RAM, and several others.
  14221. o Major features (security, backport from 0.2.5.4-alpha):
  14222. - Block authority signing keys that were used on authorities
  14223. vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
  14224. don't have any evidence that these keys _were_ compromised; we're
  14225. doing this to be prudent.) Resolves ticket 11464.
  14226. o Major bugfixes (security, OOM):
  14227. - Fix a memory leak that could occur if a microdescriptor parse
  14228. fails during the tokenizing step. This bug could enable a memory
  14229. exhaustion attack by directory servers. Fixes bug 11649; bugfix
  14230. on 0.2.2.6-alpha.
  14231. o Major bugfixes (TLS cipher selection, backport from 0.2.5.4-alpha):
  14232. - The relay ciphersuite list is now generated automatically based on
  14233. uniform criteria, and includes all OpenSSL ciphersuites with
  14234. acceptable strength and forward secrecy. Previously, we had left
  14235. some perfectly fine ciphersuites unsupported due to omission or
  14236. typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
  14237. 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
  14238. - Relays now trust themselves to have a better view than clients of
  14239. which TLS ciphersuites are better than others. (Thanks to bug
  14240. 11513, the relay list is now well-considered, whereas the client
  14241. list has been chosen mainly for anti-fingerprinting purposes.)
  14242. Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
  14243. CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
  14244. AES128. Resolves ticket 11528.
  14245. - Clients now try to advertise the same list of ciphersuites as
  14246. Firefox 28. This change enables selection of (fast) GCM
  14247. ciphersuites, disables some strange old ciphers, and stops
  14248. advertising the ECDH (not to be confused with ECDHE) ciphersuites.
  14249. Resolves ticket 11438.
  14250. o Minor bugfixes (configuration, security):
  14251. - When running a hidden service, do not allow TunneledDirConns 0:
  14252. trying to set that option together with a hidden service would
  14253. otherwise prevent the hidden service from running, and also make
  14254. it publish its descriptors directly over HTTP. Fixes bug 10849;
  14255. bugfix on 0.2.1.1-alpha.
  14256. o Minor bugfixes (controller, backport from 0.2.5.4-alpha):
  14257. - Avoid sending a garbage value to the controller when a circuit is
  14258. cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
  14259. o Minor bugfixes (exit relay, backport from 0.2.5.4-alpha):
  14260. - Stop leaking memory when we successfully resolve a PTR record.
  14261. Fixes bug 11437; bugfix on 0.2.4.7-alpha.
  14262. o Minor bugfixes (bridge client, backport from 0.2.5.4-alpha):
  14263. - Avoid 60-second delays in the bootstrapping process when Tor is
  14264. launching for a second time while using bridges. Fixes bug 9229;
  14265. bugfix on 0.2.0.3-alpha.
  14266. o Minor bugfixes (relays and bridges, backport from 0.2.5.4-alpha):
  14267. - Give the correct URL in the warning message when trying to run a
  14268. relay on an ancient version of Windows. Fixes bug 9393.
  14269. o Minor bugfixes (compilation):
  14270. - Fix a compilation error when compiling with --disable-curve25519.
  14271. Fixes bug 9700; bugfix on 0.2.4.17-rc.
  14272. o Minor bugfixes:
  14273. - Downgrade the warning severity for the the "md was still
  14274. referenced 1 node(s)" warning. Tor 0.2.5.4-alpha has better code
  14275. for trying to diagnose this bug, and the current warning in
  14276. earlier versions of tor achieves nothing useful. Addresses warning
  14277. from bug 7164.
  14278. o Minor features (log verbosity, backport from 0.2.5.4-alpha):
  14279. - When we run out of usable circuit IDs on a channel, log only one
  14280. warning for the whole channel, and describe how many circuits
  14281. there were on the channel. Fixes part of ticket 11553.
  14282. o Minor features (security, backport from 0.2.5.4-alpha):
  14283. - Decrease the lower limit of MaxMemInCellQueues to 256 MBytes (but
  14284. leave the default at 8GBytes), to better support Raspberry Pi
  14285. users. Fixes bug 9686; bugfix on 0.2.4.14-alpha.
  14286. o Documentation (backport from 0.2.5.4-alpha):
  14287. - Correctly document that we search for a system torrc file before
  14288. looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
  14289. 0.2.3.18-rc.
  14290. Changes in version 0.2.5.4-alpha - 2014-04-25
  14291. Tor 0.2.5.4-alpha includes several security and performance
  14292. improvements for clients and relays, including blacklisting authority
  14293. signing keys that were used while susceptible to the OpenSSL
  14294. "heartbleed" bug, fixing two expensive functions on busy relays,
  14295. improved TLS ciphersuite preference lists, support for run-time
  14296. hardening on compilers that support AddressSanitizer, and more work on
  14297. the Linux sandbox code.
  14298. There are also several usability fixes for clients (especially clients
  14299. that use bridges), two new TransPort protocols supported (one on
  14300. OpenBSD, one on FreeBSD), and various other bugfixes.
  14301. This release marks end-of-life for Tor 0.2.2.x; those Tor versions
  14302. have accumulated many known flaws; everyone should upgrade.
  14303. o Major features (security):
  14304. - If you don't specify MaxMemInQueues yourself, Tor now tries to
  14305. pick a good value based on your total system memory. Previously,
  14306. the default was always 8 GB. You can still override the default by
  14307. setting MaxMemInQueues yourself. Resolves ticket 11396.
  14308. - Block authority signing keys that were used on authorities
  14309. vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
  14310. don't have any evidence that these keys _were_ compromised; we're
  14311. doing this to be prudent.) Resolves ticket 11464.
  14312. o Major features (relay performance):
  14313. - Speed up server-side lookups of rendezvous and introduction point
  14314. circuits by using hashtables instead of linear searches. These
  14315. functions previously accounted between 3 and 7% of CPU usage on
  14316. some busy relays. Resolves ticket 9841.
  14317. - Avoid wasting CPU when extending a circuit over a channel that is
  14318. nearly out of circuit IDs. Previously, we would do a linear scan
  14319. over possible circuit IDs before finding one or deciding that we
  14320. had exhausted our possibilities. Now, we try at most 64 random
  14321. circuit IDs before deciding that we probably won't succeed. Fixes
  14322. a possible root cause of ticket 11553.
  14323. o Major features (seccomp2 sandbox, Linux only):
  14324. - The seccomp2 sandbox can now run a test network for multiple hours
  14325. without crashing. The sandbox is still experimental, and more bugs
  14326. will probably turn up. To try it, enable "Sandbox 1" on a Linux
  14327. host. Resolves ticket 11351.
  14328. - Strengthen sandbox code: the sandbox can now test the arguments
  14329. for rename(), and blocks _sysctl() entirely. Resolves another part
  14330. of ticket 11351.
  14331. - When the sandbox blocks a system call, it now tries to log a stack
  14332. trace before exiting. Resolves ticket 11465.
  14333. o Major bugfixes (TLS cipher selection):
  14334. - The relay ciphersuite list is now generated automatically based on
  14335. uniform criteria, and includes all OpenSSL ciphersuites with
  14336. acceptable strength and forward secrecy. Previously, we had left
  14337. some perfectly fine ciphersuites unsupported due to omission or
  14338. typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
  14339. 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
  14340. - Relays now trust themselves to have a better view than clients of
  14341. which TLS ciphersuites are better than others. (Thanks to bug
  14342. 11513, the relay list is now well-considered, whereas the client
  14343. list has been chosen mainly for anti-fingerprinting purposes.)
  14344. Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
  14345. CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
  14346. AES128. Resolves ticket 11528.
  14347. - Clients now try to advertise the same list of ciphersuites as
  14348. Firefox 28. This change enables selection of (fast) GCM
  14349. ciphersuites, disables some strange old ciphers, and stops
  14350. advertising the ECDH (not to be confused with ECDHE) ciphersuites.
  14351. Resolves ticket 11438.
  14352. o Major bugfixes (bridge client):
  14353. - Avoid 60-second delays in the bootstrapping process when Tor is
  14354. launching for a second time while using bridges. Fixes bug 9229;
  14355. bugfix on 0.2.0.3-alpha.
  14356. o Minor features (transparent proxy, *BSD):
  14357. - Support FreeBSD's ipfw firewall interface for TransPort ports on
  14358. FreeBSD. To enable it, set "TransProxyType ipfw". Resolves ticket
  14359. 10267; patch from "yurivict".
  14360. - Support OpenBSD's divert-to rules with the pf firewall for
  14361. transparent proxy ports. To enable it, set "TransProxyType
  14362. pf-divert". This allows Tor to run a TransPort transparent proxy
  14363. port on OpenBSD 4.4 or later without root privileges. See the
  14364. pf.conf(5) manual page for information on configuring pf to use
  14365. divert-to rules. Closes ticket 10896; patch from Dana Koch.
  14366. o Minor features (security):
  14367. - New --enable-expensive-hardening option to enable security
  14368. hardening options that consume nontrivial amounts of CPU and
  14369. memory. Right now, this includes AddressSanitizer and UbSan, which
  14370. are supported in newer versions of GCC and Clang. Closes ticket
  14371. 11477.
  14372. o Minor features (log verbosity):
  14373. - Demote the message that we give when a flushing connection times
  14374. out for too long from NOTICE to INFO. It was usually meaningless.
  14375. Resolves ticket 5286.
  14376. - Don't log so many notice-level bootstrapping messages at startup
  14377. about downloading descriptors. Previously, we'd log a notice
  14378. whenever we learned about more routers. Now, we only log a notice
  14379. at every 5% of progress. Fixes bug 9963.
  14380. - Warn less verbosely when receiving a malformed
  14381. ESTABLISH_RENDEZVOUS cell. Fixes ticket 11279.
  14382. - When we run out of usable circuit IDs on a channel, log only one
  14383. warning for the whole channel, and describe how many circuits
  14384. there were on the channel. Fixes part of ticket 11553.
  14385. o Minor features (relay):
  14386. - If a circuit timed out for at least 3 minutes, check if we have a
  14387. new external IP address, and publish a new descriptor with the new
  14388. IP address if it changed. Resolves ticket 2454.
  14389. o Minor features (controller):
  14390. - Make the entire exit policy available from the control port via
  14391. GETINFO exit-policy/*. Implements enhancement 7952. Patch from
  14392. "rl1987".
  14393. - Because of the fix for ticket 11396, the real limit for memory
  14394. usage may no longer match the configured MaxMemInQueues value. The
  14395. real limit is now exposed via GETINFO limits/max-mem-in-queues.
  14396. o Minor features (bridge client):
  14397. - Report a more useful failure message when we can't connect to a
  14398. bridge because we don't have the right pluggable transport
  14399. configured. Resolves ticket 9665. Patch from Fábio J. Bertinatto.
  14400. o Minor features (diagnostic):
  14401. - Add more log messages to diagnose bug 7164, which causes
  14402. intermittent "microdesc_free() called but md was still referenced"
  14403. warnings. We now include more information, to figure out why we
  14404. might be cleaning a microdescriptor for being too old if it's
  14405. still referenced by a live node_t object.
  14406. o Minor bugfixes (client, DNSPort):
  14407. - When using DNSPort, try to respond to AAAA requests with AAAA
  14408. answers. Previously, we hadn't looked at the request type when
  14409. deciding which answer type to prefer. Fixes bug 10468; bugfix on
  14410. 0.2.4.7-alpha.
  14411. - When receiving a DNS query for an unsupported record type, reply
  14412. with no answer rather than with a NOTIMPL error. This behavior
  14413. isn't correct either, but it will break fewer client programs, we
  14414. hope. Fixes bug 10268; bugfix on 0.2.0.1-alpha. Original patch
  14415. from "epoch".
  14416. o Minor bugfixes (exit relay):
  14417. - Stop leaking memory when we successfully resolve a PTR record.
  14418. Fixes bug 11437; bugfix on 0.2.4.7-alpha.
  14419. o Minor bugfixes (bridge client):
  14420. - Stop accepting bridge lines containing hostnames. Doing so would
  14421. cause clients to perform DNS requests on the hostnames, which was
  14422. not sensible behavior. Fixes bug 10801; bugfix on 0.2.0.1-alpha.
  14423. - Avoid a 60-second delay in the bootstrapping process when a Tor
  14424. client with pluggable transports re-reads its configuration at
  14425. just the wrong time. Re-fixes bug 11156; bugfix on 0.2.5.3-alpha.
  14426. o Minor bugfixes (client, logging during bootstrap):
  14427. - Warn only once if we start logging in an unsafe way. Previously,
  14428. we complain as many times as we had problems. Fixes bug 9870;
  14429. bugfix on 0.2.5.1-alpha.
  14430. - Only report the first fatal bootstrap error on a given OR
  14431. connection. This stops us from telling the controller bogus error
  14432. messages like "DONE". Fixes bug 10431; bugfix on 0.2.1.1-alpha.
  14433. - Be more helpful when trying to run sandboxed on Linux without
  14434. libseccomp. Instead of saying "Sandbox is not implemented on this
  14435. platform", we now explain that we need to be built with
  14436. libseccomp. Fixes bug 11543; bugfix on 0.2.5.1-alpha.
  14437. - Avoid generating spurious warnings when starting with
  14438. DisableNetwork enabled. Fixes bug 11200 and bug 10405; bugfix on
  14439. 0.2.3.9-alpha.
  14440. o Minor bugfixes (closing OR connections):
  14441. - If write_to_buf() in connection_write_to_buf_impl_() ever fails,
  14442. check if it's an or_connection_t and correctly call
  14443. connection_or_close_for_error() rather than
  14444. connection_mark_for_close() directly. Fixes bug 11304; bugfix on
  14445. 0.2.4.4-alpha.
  14446. - When closing all connections on setting DisableNetwork to 1, use
  14447. connection_or_close_normally() rather than closing OR connections
  14448. out from under the channel layer. Fixes bug 11306; bugfix on
  14449. 0.2.4.4-alpha.
  14450. o Minor bugfixes (controller):
  14451. - Avoid sending a garbage value to the controller when a circuit is
  14452. cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
  14453. o Minor bugfixes (tor-fw-helper):
  14454. - Allow tor-fw-helper to build again by adding src/ext to its
  14455. CPPFLAGS. Fixes bug 11296; bugfix on 0.2.5.3-alpha.
  14456. o Minor bugfixes (bridges):
  14457. - Avoid potential crashes or bad behavior when launching a
  14458. server-side managed proxy with ORPort or ExtORPort temporarily
  14459. disabled. Fixes bug 9650; bugfix on 0.2.3.16-alpha.
  14460. o Minor bugfixes (platform-specific):
  14461. - Fix compilation on Solaris, which does not have <endian.h>. Fixes
  14462. bug 11426; bugfix on 0.2.5.3-alpha.
  14463. - When dumping a malformed directory object to disk, save it in
  14464. binary mode on Windows, not text mode. Fixes bug 11342; bugfix on
  14465. 0.2.2.1-alpha.
  14466. - Don't report failures from make_socket_reuseable() on incoming
  14467. sockets on OSX: this can happen when incoming connections close
  14468. early. Fixes bug 10081.
  14469. o Minor bugfixes (trivial memory leaks):
  14470. - Fix a small memory leak when signing a directory object. Fixes bug
  14471. 11275; bugfix on 0.2.4.13-alpha.
  14472. - Free placeholder entries in our circuit table at exit; fixes a
  14473. harmless memory leak. Fixes bug 11278; bugfix on 0.2.5.1-alpha.
  14474. - Don't re-initialize a second set of OpenSSL mutexes when starting
  14475. up. Previously, we'd make one set of mutexes, and then immediately
  14476. replace them with another. Fixes bug 11726; bugfix on
  14477. 0.2.5.3-alpha.
  14478. - Resolve some memory leaks found by coverity in the unit tests, on
  14479. exit in tor-gencert, and on a failure to compute digests for our
  14480. own keys when generating a v3 networkstatus vote. These leaks
  14481. should never have affected anyone in practice.
  14482. o Minor bugfixes (hidden service):
  14483. - Only retry attempts to connect to a chosen rendezvous point 8
  14484. times, not 30. Fixes bug 4241; bugfix on 0.1.0.1-rc.
  14485. o Minor bugfixes (misc code correctness):
  14486. - Fix various instances of undefined behavior in channeltls.c,
  14487. tor_memmem(), and eventdns.c that would cause us to construct
  14488. pointers to memory outside an allocated object. (These invalid
  14489. pointers were not accessed, but C does not even allow them to
  14490. exist.) Fixes bug 10363; bugfixes on 0.1.1.1-alpha, 0.1.2.1-alpha,
  14491. 0.2.0.10-alpha, and 0.2.3.6-alpha. Reported by "bobnomnom".
  14492. - Use the AddressSanitizer and Ubsan sanitizers (in clang-3.4) to
  14493. fix some miscellaneous errors in our tests and codebase. Fixes bug
  14494. 11232. Bugfixes on versions back as far as 0.2.1.11-alpha.
  14495. - Always check return values for unlink, munmap, UnmapViewOfFile;
  14496. check strftime return values more often. In some cases all we can
  14497. do is report a warning, but this may help prevent deeper bugs from
  14498. going unnoticed. Closes ticket 8787; bugfixes on many, many tor
  14499. versions.
  14500. - Fix numerous warnings from the clang "scan-build" static analyzer.
  14501. Some of these are programming style issues; some of them are false
  14502. positives that indicated awkward code; some are undefined behavior
  14503. cases related to constructing (but not using) invalid pointers;
  14504. some are assumptions about API behavior; some are (harmlessly)
  14505. logging sizeof(ptr) bytes from a token when sizeof(*ptr) would be
  14506. correct; and one or two are genuine bugs that weren't reachable
  14507. from the rest of the program. Fixes bug 8793; bugfixes on many,
  14508. many tor versions.
  14509. o Documentation:
  14510. - Build the torify.1 manpage again. Previously, we were only trying
  14511. to build it when also building tor-fw-helper. That's why we didn't
  14512. notice that we'd broken the ability to build it. Fixes bug 11321;
  14513. bugfix on 0.2.5.1-alpha.
  14514. - Fix the layout of the SOCKSPort flags in the manpage. Fixes bug
  14515. 11061; bugfix on 0.2.4.7-alpha.
  14516. - Correctly document that we search for a system torrc file before
  14517. looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
  14518. 0.2.3.18-rc.
  14519. - Resolve warnings from Doxygen.
  14520. o Code simplifications and refactoring:
  14521. - Remove is_internal_IP() function. Resolves ticket 4645.
  14522. - Remove unused function circuit_dump_by_chan from circuitlist.c.
  14523. Closes issue 9107; patch from "marek".
  14524. - Change our use of the ENUM_BF macro to avoid declarations that
  14525. confuse Doxygen.
  14526. o Deprecated versions:
  14527. - Tor 0.2.2.x has reached end-of-life; it has received no patches or
  14528. attention for some while. Directory authorities no longer accept
  14529. descriptors from relays running any version of Tor prior to Tor
  14530. 0.2.3.16-alpha. Resolves ticket 11149.
  14531. o Testing:
  14532. - New macros in test.h to simplify writing mock-functions for unit
  14533. tests. Part of ticket 11507. Patch from Dana Koch.
  14534. - Complete tests for the status.c module. Resolves ticket 11507.
  14535. Patch from Dana Koch.
  14536. o Removed code:
  14537. - Remove all code for the long unused v1 directory protocol.
  14538. Resolves ticket 11070.
  14539. Changes in version 0.2.5.3-alpha - 2014-03-22
  14540. Tor 0.2.5.3-alpha includes all the fixes from 0.2.4.21. It contains
  14541. two new anti-DoS features for Tor relays, resolves a bug that kept
  14542. SOCKS5 support for IPv6 from working, fixes several annoying usability
  14543. issues for bridge users, and removes more old code for unused
  14544. directory formats.
  14545. The Tor 0.2.5.x release series is now in patch-freeze: no feature
  14546. patches not already written will be considered for inclusion in 0.2.5.x.
  14547. o Major features (relay security, DoS-resistance):
  14548. - When deciding whether we have run out of memory and we need to
  14549. close circuits, also consider memory allocated in buffers for
  14550. streams attached to each circuit.
  14551. This change, which extends an anti-DoS feature introduced in
  14552. 0.2.4.13-alpha and improved in 0.2.4.14-alpha, lets Tor exit relays
  14553. better resist more memory-based DoS attacks than before. Since the
  14554. MaxMemInCellQueues option now applies to all queues, it is renamed
  14555. to MaxMemInQueues. This feature fixes bug 10169.
  14556. - Avoid hash-flooding denial-of-service attacks by using the secure
  14557. SipHash-2-4 hash function for our hashtables. Without this
  14558. feature, an attacker could degrade performance of a targeted
  14559. client or server by flooding their data structures with a large
  14560. number of entries to be stored at the same hash table position,
  14561. thereby slowing down the Tor instance. With this feature, hash
  14562. table positions are derived from a randomized cryptographic key,
  14563. and an attacker cannot predict which entries will collide. Closes
  14564. ticket 4900.
  14565. - Decrease the lower limit of MaxMemInQueues to 256 MBytes (but leave
  14566. the default at 8GBytes), to better support Raspberry Pi users. Fixes
  14567. bug 9686; bugfix on 0.2.4.14-alpha.
  14568. o Minor features (bridges, pluggable transports):
  14569. - Bridges now write the SHA1 digest of their identity key
  14570. fingerprint (that is, a hash of a hash of their public key) to
  14571. notice-level logs, and to a new hashed-fingerprint file. This
  14572. information will help bridge operators look up their bridge in
  14573. Globe and similar tools. Resolves ticket 10884.
  14574. - Improve the message that Tor displays when running as a bridge
  14575. using pluggable transports without an Extended ORPort listener.
  14576. Also, log the message in the log file too. Resolves ticket 11043.
  14577. o Minor features (other):
  14578. - Add a new option, PredictedPortsRelevanceTime, to control how long
  14579. after having received a request to connect to a given port Tor
  14580. will try to keep circuits ready in anticipation of future requests
  14581. for that port. Patch from "unixninja92"; implements ticket 9176.
  14582. - Generate a warning if any ports are listed in the SocksPolicy,
  14583. DirPolicy, AuthDirReject, AuthDirInvalid, AuthDirBadDir, or
  14584. AuthDirBadExit options. (These options only support address
  14585. ranges.) Fixes part of ticket 11108.
  14586. - Update geoip and geoip6 to the February 7 2014 Maxmind GeoLite2
  14587. Country database.
  14588. o Minor bugfixes (new since 0.2.5.2-alpha, also in 0.2.4.21):
  14589. - Build without warnings under clang 3.4. (We have some macros that
  14590. define static functions only some of which will get used later in
  14591. the module. Starting with clang 3.4, these give a warning unless the
  14592. unused attribute is set on them.) Resolves ticket 10904.
  14593. - Fix build warnings about missing "a2x" comment when building the
  14594. manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
  14595. Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
  14596. o Minor bugfixes (client):
  14597. - Improve the log message when we can't connect to a hidden service
  14598. because all of the hidden service directory nodes hosting its
  14599. descriptor are excluded. Improves on our fix for bug 10722, which
  14600. was a bugfix on 0.2.0.10-alpha.
  14601. - Raise a control port warning when we fail to connect to all of
  14602. our bridges. Previously, we didn't inform the controller, and
  14603. the bootstrap process would stall. Fixes bug 11069; bugfix on
  14604. 0.2.1.2-alpha.
  14605. - Exit immediately when a process-owning controller exits.
  14606. Previously, tor relays would wait for a little while after their
  14607. controller exited, as if they had gotten an INT signal -- but this
  14608. was problematic, since there was no feedback for the user. To do a
  14609. clean shutdown, controllers should send an INT signal and give Tor
  14610. a chance to clean up. Fixes bug 10449; bugfix on 0.2.2.28-beta.
  14611. - Stop attempting to connect to bridges before our pluggable
  14612. transports are configured (harmless but resulted in some erroneous
  14613. log messages). Fixes bug 11156; bugfix on 0.2.3.2-alpha.
  14614. - Fix connections to IPv6 addresses over SOCKS5. Previously, we were
  14615. generating incorrect SOCKS5 responses, and confusing client
  14616. applications. Fixes bug 10987; bugfix on 0.2.4.7-alpha.
  14617. o Minor bugfixes (relays and bridges):
  14618. - Avoid crashing on a malformed resolv.conf file when running a
  14619. relay using Libevent 1. Fixes bug 8788; bugfix on 0.1.1.23.
  14620. - Non-exit relays no longer launch mock DNS requests to check for
  14621. DNS hijacking. This has been unnecessary since 0.2.1.7-alpha, when
  14622. non-exit relays stopped servicing DNS requests. Fixes bug 965;
  14623. bugfix on 0.2.1.7-alpha. Patch from Matt Pagan.
  14624. - Bridges now report complete directory request statistics. Related
  14625. to bug 5824; bugfix on 0.2.2.1-alpha.
  14626. - Bridges now never collect statistics that were designed for
  14627. relays. Fixes bug 5824; bugfix on 0.2.3.8-alpha.
  14628. - Stop giving annoying warning messages when we decide not to launch
  14629. a pluggable transport proxy that we don't need (because there are
  14630. no bridges configured to use it). Resolves ticket 5018; bugfix
  14631. on 0.2.5.2-alpha.
  14632. - Give the correct URL in the warning message when trying to run a
  14633. relay on an ancient version of Windows. Fixes bug 9393.
  14634. o Minor bugfixes (backtrace support):
  14635. - Support automatic backtraces on more platforms by using the
  14636. "-fasynchronous-unwind-tables" compiler option. This option is
  14637. needed for platforms like 32-bit Intel where "-fomit-frame-pointer"
  14638. is on by default and table generation is not. This doesn't yet
  14639. add Windows support; only Linux, OSX, and some BSDs are affected.
  14640. Reported by 'cypherpunks'; fixes bug 11047; bugfix on 0.2.5.2-alpha.
  14641. - Avoid strange behavior if two threads hit failed assertions at the
  14642. same time and both try to log backtraces at once. (Previously, if
  14643. this had happened, both threads would have stored their intermediate
  14644. results in the same buffer, and generated junk outputs.) Reported by
  14645. "cypherpunks". Fixes bug 11048; bugfix on 0.2.5.2-alpha.
  14646. - Fix a compiler warning in format_number_sigsafe(). Bugfix on
  14647. 0.2.5.2-alpha; patch from Nick Hopper.
  14648. o Minor bugfixes (unit tests):
  14649. - Fix a small bug in the unit tests that might have made the tests
  14650. call 'chmod' with an uninitialized bitmask. Fixes bug 10928;
  14651. bugfix on 0.2.5.1-alpha. Patch from Dana Koch.
  14652. o Removed code:
  14653. - Remove all remaining code related to version-0 hidden service
  14654. descriptors: they have not been in use since 0.2.2.1-alpha. Fixes
  14655. the rest of bug 10841.
  14656. o Documentation:
  14657. - Document in the manpage that "KBytes" may also be written as
  14658. "kilobytes" or "KB", that "Kbits" may also be written as
  14659. "kilobits", and so forth. Closes ticket 9222.
  14660. - Document that the ClientOnly config option overrides ORPort.
  14661. Our old explanation made ClientOnly sound as though it did
  14662. nothing at all. Resolves bug 9059.
  14663. - Explain that SocksPolicy, DirPolicy, and similar options don't
  14664. take port arguments. Fixes the other part of ticket 11108.
  14665. - Fix a comment about the rend_server_descriptor_t.protocols field
  14666. to more accurately describe its range. Also, make that field
  14667. unsigned, to more accurately reflect its usage. Fixes bug 9099;
  14668. bugfix on 0.2.1.5-alpha.
  14669. - Fix the manpage's description of HiddenServiceAuthorizeClient:
  14670. the maximum client name length is 16, not 19. Fixes bug 11118;
  14671. bugfix on 0.2.1.6-alpha.
  14672. o Code simplifications and refactoring:
  14673. - Get rid of router->address, since in all cases it was just the
  14674. string representation of router->addr. Resolves ticket 5528.
  14675. o Test infrastructure:
  14676. - Update to the latest version of tinytest.
  14677. - Improve the tinytest implementation of string operation tests so
  14678. that comparisons with NULL strings no longer crash the tests; they
  14679. now just fail, normally. Fixes bug 9004; bugfix on 0.2.2.4-alpha.
  14680. Changes in version 0.2.4.21 - 2014-02-28
  14681. Tor 0.2.4.21 further improves security against potential adversaries who
  14682. find breaking 1024-bit crypto doable, and backports several stability
  14683. and robustness patches from the 0.2.5 branch.
  14684. o Major features (client security):
  14685. - When we choose a path for a 3-hop circuit, make sure it contains
  14686. at least one relay that supports the NTor circuit extension
  14687. handshake. Otherwise, there is a chance that we're building
  14688. a circuit that's worth attacking by an adversary who finds
  14689. breaking 1024-bit crypto doable, and that chance changes the game
  14690. theory. Implements ticket 9777.
  14691. o Major bugfixes:
  14692. - Do not treat streams that fail with reason
  14693. END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
  14694. since it could also indicate an ENETUNREACH connection error. Fixes
  14695. part of bug 10777; bugfix on 0.2.4.8-alpha.
  14696. o Code simplification and refactoring:
  14697. - Remove data structures which were introduced to implement the
  14698. CellStatistics option: they are now redundant with the new timestamp
  14699. field in the regular packed_cell_t data structure, which we did
  14700. in 0.2.4.18-rc in order to resolve bug 9093. Resolves ticket 10870.
  14701. o Minor features:
  14702. - Always clear OpenSSL bignums before freeing them -- even bignums
  14703. that don't contain secrets. Resolves ticket 10793. Patch by
  14704. Florent Daigniere.
  14705. - Build without warnings under clang 3.4. (We have some macros that
  14706. define static functions only some of which will get used later in
  14707. the module. Starting with clang 3.4, these give a warning unless the
  14708. unused attribute is set on them.) Resolves ticket 10904.
  14709. - Update geoip and geoip6 files to the February 7 2014 Maxmind
  14710. GeoLite2 Country database.
  14711. o Minor bugfixes:
  14712. - Set the listen() backlog limit to the largest actually supported
  14713. on the system, not to the value in a header file. Fixes bug 9716;
  14714. bugfix on every released Tor.
  14715. - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
  14716. exit node as a NOROUTE error, not an INTERNAL error, since they
  14717. can apparently happen when trying to connect to the wrong sort
  14718. of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
  14719. - Fix build warnings about missing "a2x" comment when building the
  14720. manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
  14721. Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
  14722. - Avoid a segfault on SIGUSR1, where we had freed a connection but did
  14723. not entirely remove it from the connection lists. Fixes bug 9602;
  14724. bugfix on 0.2.4.4-alpha.
  14725. - Fix a segmentation fault in our benchmark code when running with
  14726. Fedora's OpenSSL package, or any other OpenSSL that provides
  14727. ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
  14728. - Turn "circuit handshake stats since last time" log messages into a
  14729. heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
  14730. o Documentation fixes:
  14731. - Document that all but one DirPort entry must have the NoAdvertise
  14732. flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
  14733. Changes in version 0.2.5.2-alpha - 2014-02-13
  14734. Tor 0.2.5.2-alpha includes all the fixes from 0.2.4.18-rc and 0.2.4.20,
  14735. like the "poor random number generation" fix and the "building too many
  14736. circuits" fix. It also further improves security against potential
  14737. adversaries who find breaking 1024-bit crypto doable, and launches
  14738. pluggable transports on demand (which gets us closer to integrating
  14739. pluggable transport support by default -- not to be confused with Tor
  14740. bundles enabling pluggable transports and bridges by default).
  14741. o Major features (client security):
  14742. - When we choose a path for a 3-hop circuit, make sure it contains
  14743. at least one relay that supports the NTor circuit extension
  14744. handshake. Otherwise, there is a chance that we're building
  14745. a circuit that's worth attacking by an adversary who finds
  14746. breaking 1024-bit crypto doable, and that chance changes the game
  14747. theory. Implements ticket 9777.
  14748. - Clients now look at the "usecreatefast" consensus parameter to
  14749. decide whether to use CREATE_FAST or CREATE cells for the first hop
  14750. of their circuit. This approach can improve security on connections
  14751. where Tor's circuit handshake is stronger than the available TLS
  14752. connection security levels, but the tradeoff is more computational
  14753. load on guard relays. Implements proposal 221. Resolves ticket 9386.
  14754. o Major features (bridges):
  14755. - Don't launch pluggable transport proxies if we don't have any
  14756. bridges configured that would use them. Now we can list many
  14757. pluggable transports, and Tor will dynamically start one when it
  14758. hears a bridge address that needs it. Resolves ticket 5018.
  14759. - The bridge directory authority now assigns status flags (Stable,
  14760. Guard, etc) to bridges based on thresholds calculated over all
  14761. Running bridges. Now bridgedb can finally make use of its features
  14762. to e.g. include at least one Stable bridge in its answers. Fixes
  14763. bug 9859.
  14764. o Major features (other):
  14765. - Extend ORCONN controller event to include an "ID" parameter,
  14766. and add four new controller event types CONN_BW, CIRC_BW,
  14767. CELL_STATS, and TB_EMPTY that show connection and circuit usage.
  14768. The new events are emitted in private Tor networks only, with the
  14769. goal of being able to better track performance and load during
  14770. full-network simulations. Implements proposal 218 and ticket 7359.
  14771. - On some platforms (currently: recent OSX versions, glibc-based
  14772. platforms that support the ELF format, and a few other
  14773. Unix-like operating systems), Tor can now dump stack traces
  14774. when a crash occurs or an assertion fails. By default, traces
  14775. are dumped to stderr (if possible) and to any logs that are
  14776. reporting errors. Implements ticket 9299.
  14777. o Major bugfixes:
  14778. - Avoid a segfault on SIGUSR1, where we had freed a connection but did
  14779. not entirely remove it from the connection lists. Fixes bug 9602;
  14780. bugfix on 0.2.4.4-alpha.
  14781. - Do not treat streams that fail with reason
  14782. END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
  14783. since it could also indicate an ENETUNREACH connection error. Fixes
  14784. part of bug 10777; bugfix on 0.2.4.8-alpha.
  14785. o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
  14786. - Do not allow OpenSSL engines to replace the PRNG, even when
  14787. HardwareAccel is set. The only default builtin PRNG engine uses
  14788. the Intel RDRAND instruction to replace the entire PRNG, and
  14789. ignores all attempts to seed it with more entropy. That's
  14790. cryptographically stupid: the right response to a new alleged
  14791. entropy source is never to discard all previously used entropy
  14792. sources. Fixes bug 10402; works around behavior introduced in
  14793. OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
  14794. and "rl1987".
  14795. - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
  14796. address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
  14797. - Avoid launching spurious extra circuits when a stream is pending.
  14798. This fixes a bug where any circuit that _wasn't_ unusable for new
  14799. streams would be treated as if it were, causing extra circuits to
  14800. be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
  14801. o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
  14802. - No longer stop reading or writing on cpuworker connections when
  14803. our rate limiting buckets go empty. Now we should handle circuit
  14804. handshake requests more promptly. Resolves bug 9731.
  14805. - Stop trying to bootstrap all our directory information from
  14806. only our first guard. Discovered while fixing bug 9946; bugfix
  14807. on 0.2.4.8-alpha.
  14808. o Minor features (bridges, pluggable transports):
  14809. - Add threshold cutoffs to the networkstatus document created by
  14810. the Bridge Authority. Fixes bug 1117.
  14811. - On Windows, spawn background processes using the CREATE_NO_WINDOW
  14812. flag. Now Tor Browser Bundle 3.5 with pluggable transports enabled
  14813. doesn't pop up a blank console window. (In Tor Browser Bundle 2.x,
  14814. Vidalia set this option for us.) Implements ticket 10297.
  14815. o Minor features (security):
  14816. - Always clear OpenSSL bignums before freeing them -- even bignums
  14817. that don't contain secrets. Resolves ticket 10793. Patch by
  14818. Florent Daignière.
  14819. o Minor features (config options and command line):
  14820. - Add an --allow-missing-torrc commandline option that tells Tor to
  14821. run even if the configuration file specified by -f is not available.
  14822. Implements ticket 10060.
  14823. - Add support for the TPROXY transparent proxying facility on Linux.
  14824. See documentation for the new TransProxyType option for more
  14825. details. Implementation by "thomo". Closes ticket 10582.
  14826. o Minor features (controller):
  14827. - Add a new "HS_DESC" controller event that reports activities
  14828. related to hidden service descriptors. Resolves ticket 8510.
  14829. - New "DROPGUARDS" controller command to forget all current entry
  14830. guards. Not recommended for ordinary use, since replacing guards
  14831. too frequently makes several attacks easier. Resolves ticket 9934;
  14832. patch from "ra".
  14833. o Minor features (build):
  14834. - Assume that a user using ./configure --host wants to cross-compile,
  14835. and give an error if we cannot find a properly named
  14836. tool-chain. Add a --disable-tool-name-check option to proceed
  14837. nevertheless. Addresses ticket 9869. Patch by Benedikt Gollatz.
  14838. - If we run ./configure and the compiler recognizes -fstack-protector
  14839. but the linker rejects it, warn the user about a potentially missing
  14840. libssp package. Addresses ticket 9948. Patch from Benedikt Gollatz.
  14841. o Minor features (testing):
  14842. - If Python is installed, "make check" now runs extra tests beyond
  14843. the unit test scripts.
  14844. - When bootstrapping a test network, sometimes very few relays get
  14845. the Guard flag. Now a new option "TestingDirAuthVoteGuard" can
  14846. specify a set of relays which should be voted Guard regardless of
  14847. their uptime or bandwidth. Addresses ticket 9206.
  14848. o Minor features (log messages):
  14849. - When ServerTransportPlugin is set on a bridge, Tor can write more
  14850. useful statistics about bridge use in its extrainfo descriptors,
  14851. but only if the Extended ORPort ("ExtORPort") is set too. Add a
  14852. log message to inform the user in this case. Resolves ticket 9651.
  14853. - When receiving a new controller connection, log the origin address.
  14854. Resolves ticket 9698; patch from "sigpipe".
  14855. - When logging OpenSSL engine status at startup, log the status of
  14856. more engines. Fixes ticket 10043; patch from Joshua Datko.
  14857. - Turn "circuit handshake stats since last time" log messages into a
  14858. heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
  14859. o Minor features (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
  14860. - Improve the circuit queue out-of-memory handler. Previously, when
  14861. we ran low on memory, we'd close whichever circuits had the most
  14862. queued cells. Now, we close those that have the *oldest* queued
  14863. cells, on the theory that those are most responsible for us
  14864. running low on memory. Based on analysis from a forthcoming paper
  14865. by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
  14866. - Generate bootstrapping status update events correctly when fetching
  14867. microdescriptors. Fixes bug 9927.
  14868. - Update to the October 2 2013 Maxmind GeoLite Country database.
  14869. o Minor bugfixes (clients):
  14870. - When closing a channel that has already been open, do not close
  14871. pending circuits that were waiting to connect to the same relay.
  14872. Fixes bug 9880; bugfix on 0.2.5.1-alpha. Thanks to skruffy for
  14873. finding this bug.
  14874. o Minor bugfixes (relays):
  14875. - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
  14876. exit node as a NOROUTE error, not an INTERNAL error, since they
  14877. can apparently happen when trying to connect to the wrong sort
  14878. of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
  14879. o Minor bugfixes (bridges):
  14880. - Fix a bug where the first connection works to a bridge that uses a
  14881. pluggable transport with client-side parameters, but we don't send
  14882. the client-side parameters on subsequent connections. (We don't
  14883. use any pluggable transports with client-side parameters yet,
  14884. but ScrambleSuit will soon become the first one.) Fixes bug 9162;
  14885. bugfix on 0.2.0.3-alpha. Based on a patch from "rl1987".
  14886. o Minor bugfixes (node selection):
  14887. - If ExcludeNodes is set, consider non-excluded hidden service
  14888. directory servers before excluded ones. Do not consider excluded
  14889. hidden service directory servers at all if StrictNodes is
  14890. set. (Previously, we would sometimes decide to connect to those
  14891. servers, and then realize before we initiated a connection that
  14892. we had excluded them.) Fixes bug 10722; bugfix on 0.2.0.10-alpha.
  14893. Reported by "mr-4".
  14894. - If we set the ExitNodes option but it doesn't include any nodes
  14895. that have the Exit flag, we would choose not to bootstrap. Now we
  14896. bootstrap so long as ExitNodes includes nodes which can exit to
  14897. some port. Fixes bug 10543; bugfix on 0.2.4.10-alpha.
  14898. o Minor bugfixes (controller and command-line):
  14899. - If changing a config option via "setconf" fails in a recoverable
  14900. way, we used to nonetheless write our new control ports to the
  14901. file described by the "ControlPortWriteToFile" option. Now we only
  14902. write out that file if we successfully switch to the new config
  14903. option. Fixes bug 5605; bugfix on 0.2.2.26-beta. Patch from "Ryman".
  14904. - When a command-line option such as --version or --help that
  14905. ordinarily implies --hush appears on the command line along with
  14906. --quiet, then actually obey --quiet. Previously, we obeyed --quiet
  14907. only if it appeared later on the command line. Fixes bug 9578;
  14908. bugfix on 0.2.5.1-alpha.
  14909. o Minor bugfixes (code correctness):
  14910. - Previously we used two temporary files when writing descriptors to
  14911. disk; now we only use one. Fixes bug 1376.
  14912. - Remove an erroneous (but impossible and thus harmless) pointer
  14913. comparison that would have allowed compilers to skip a bounds
  14914. check in channeltls.c. Fixes bugs 10313 and 9980; bugfix on
  14915. 0.2.0.10-alpha. Noticed by Jared L Wong and David Fifield.
  14916. - Fix an always-true assertion in pluggable transports code so it
  14917. actually checks what it was trying to check. Fixes bug 10046;
  14918. bugfix on 0.2.3.9-alpha. Found by "dcb".
  14919. o Minor bugfixes (protocol correctness):
  14920. - When receiving a VERSIONS cell with an odd number of bytes, close
  14921. the connection immediately since the cell is malformed. Fixes bug
  14922. 10365; bugfix on 0.2.0.10-alpha. Spotted by "bobnomnom"; fix by
  14923. "rl1987".
  14924. o Minor bugfixes (build):
  14925. - Restore the ability to compile Tor with V2_HANDSHAKE_SERVER
  14926. turned off (that is, without support for v2 link handshakes). Fixes
  14927. bug 4677; bugfix on 0.2.3.2-alpha. Patch from "piet".
  14928. - Fix compilation warnings and startup issues when running with
  14929. "Sandbox 1" and libseccomp-2.1.0. Fixes bug 10563; bugfix on
  14930. 0.2.5.1-alpha.
  14931. - Fix compilation on Solaris 9, which didn't like us having an
  14932. identifier named "sun". Fixes bug 10565; bugfix in 0.2.5.1-alpha.
  14933. o Minor bugfixes (testing):
  14934. - Fix a segmentation fault in our benchmark code when running with
  14935. Fedora's OpenSSL package, or any other OpenSSL that provides
  14936. ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
  14937. o Minor bugfixes (log messages):
  14938. - Fix a bug where clients using bridges would report themselves
  14939. as 50% bootstrapped even without a live consensus document.
  14940. Fixes bug 9922; bugfix on 0.2.1.1-alpha.
  14941. - Suppress a warning where, if there's only one directory authority
  14942. in the network, we would complain that votes and signatures cannot
  14943. be uploaded to other directory authorities. Fixes bug 10842;
  14944. bugfix on 0.2.2.26-beta.
  14945. - Report bootstrapping progress correctly when we're downloading
  14946. microdescriptors. We had updated our "do we have enough microdescs
  14947. to begin building circuits?" logic most recently in 0.2.4.10-alpha
  14948. (see bug 5956), but we left the bootstrap status event logic at
  14949. "how far through getting 1/4 of them are we?" Fixes bug 9958;
  14950. bugfix on 0.2.2.36, which is where they diverged (see bug 5343).
  14951. o Minor bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
  14952. - Avoid a crash bug when starting with a corrupted microdescriptor
  14953. cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
  14954. - If we fail to dump a previously cached microdescriptor to disk, avoid
  14955. freeing duplicate data later on. Fixes bug 10423; bugfix on
  14956. 0.2.4.13-alpha. Spotted by "bobnomnom".
  14957. o Minor bugfixes on 0.2.4.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
  14958. - Correctly log long IPv6 exit policies, instead of truncating them
  14959. or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
  14960. - Our default TLS ecdhe groups were backwards: we meant to be using
  14961. P224 for relays (for performance win) and P256 for bridges (since
  14962. it is more common in the wild). Instead we had it backwards. After
  14963. reconsideration, we decided that the default should be P256 on all
  14964. hosts, since its security is probably better, and since P224 is
  14965. reportedly used quite little in the wild. Found by "skruffy" on
  14966. IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
  14967. - Free directory authority certificate download statuses on exit
  14968. rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
  14969. o Minor bugfixes on 0.2.3.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
  14970. - If the guard we choose first doesn't answer, we would try the
  14971. second guard, but once we connected to the second guard we would
  14972. abandon it and retry the first one, slowing down bootstrapping.
  14973. The fix is to treat all our initially chosen guards as acceptable
  14974. to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
  14975. - Fix an assertion failure that would occur when disabling the
  14976. ORPort setting on a running Tor process while accounting was
  14977. enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
  14978. - When examining the list of network interfaces to find our address,
  14979. do not consider non-running or disabled network interfaces. Fixes
  14980. bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
  14981. - Avoid an off-by-one error when checking buffer boundaries when
  14982. formatting the exit status of a pluggable transport helper.
  14983. This is probably not an exploitable bug, but better safe than
  14984. sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
  14985. Pedro Ribeiro.
  14986. o Removed code and features:
  14987. - Clients now reject any directory authority certificates lacking
  14988. a dir-key-crosscert element. These have been included since
  14989. 0.2.1.9-alpha, so there's no real reason for them to be optional
  14990. any longer. Completes proposal 157. Resolves ticket 10162.
  14991. - Remove all code that existed to support the v2 directory system,
  14992. since there are no longer any v2 directory authorities. Resolves
  14993. ticket 10758.
  14994. - Remove the HSAuthoritativeDir and AlternateHSAuthority torrc
  14995. options, which were used for designating authorities as "Hidden
  14996. service authorities". There has been no use of hidden service
  14997. authorities since 0.2.2.1-alpha, when we stopped uploading or
  14998. downloading v0 hidden service descriptors. Fixes bug 10881; also
  14999. part of a fix for bug 10841.
  15000. o Code simplification and refactoring:
  15001. - Remove some old fallback code designed to keep Tor clients working
  15002. in a network with only two working relays. Elsewhere in the code we
  15003. have long since stopped supporting such networks, so there wasn't
  15004. much point in keeping it around. Addresses ticket 9926.
  15005. - Reject 0-length EXTEND2 cells more explicitly. Fixes bug 10536;
  15006. bugfix on 0.2.4.8-alpha. Reported by "cypherpunks".
  15007. - Remove data structures which were introduced to implement the
  15008. CellStatistics option: they are now redundant with the addition
  15009. of a timestamp to the regular packed_cell_t data structure, which
  15010. we did in 0.2.4.18-rc in order to resolve ticket 9093. Implements
  15011. ticket 10870.
  15012. o Documentation (man page) fixes:
  15013. - Update manpage to describe some of the files you can expect to
  15014. find in Tor's DataDirectory. Addresses ticket 9839.
  15015. - Document that all but one DirPort entry must have the NoAdvertise
  15016. flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
  15017. o Documentation fixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
  15018. - Clarify the usage and risks of setting the ContactInfo torrc line
  15019. for your relay or bridge. Resolves ticket 9854.
  15020. - Add anchors to the manpage so we can link to the html version of
  15021. the documentation for specific options. Resolves ticket 9866.
  15022. - Replace remaining references to DirServer in man page and
  15023. log entries. Resolves ticket 10124.
  15024. o Tool changes:
  15025. - Make the "tor-gencert" tool used by directory authority operators
  15026. create 2048-bit signing keys by default (rather than 1024-bit, since
  15027. 1024-bit is uncomfortably small these days). Addresses ticket 10324.
  15028. Changes in version 0.2.4.20 - 2013-12-22
  15029. Tor 0.2.4.20 fixes potentially poor random number generation for users
  15030. who 1) use OpenSSL 1.0.0 or later, 2) set "HardwareAccel 1" in their
  15031. torrc file, 3) have "Sandy Bridge" or "Ivy Bridge" Intel processors,
  15032. and 4) have no state file in their DataDirectory (as would happen on
  15033. first start). Users who generated relay or hidden service identity
  15034. keys in such a situation should discard them and generate new ones.
  15035. This release also fixes a logic error that caused Tor clients to build
  15036. many more preemptive circuits than they actually need.
  15037. o Major bugfixes:
  15038. - Do not allow OpenSSL engines to replace the PRNG, even when
  15039. HardwareAccel is set. The only default builtin PRNG engine uses
  15040. the Intel RDRAND instruction to replace the entire PRNG, and
  15041. ignores all attempts to seed it with more entropy. That's
  15042. cryptographically stupid: the right response to a new alleged
  15043. entropy source is never to discard all previously used entropy
  15044. sources. Fixes bug 10402; works around behavior introduced in
  15045. OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
  15046. and "rl1987".
  15047. - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
  15048. address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
  15049. - Avoid launching spurious extra circuits when a stream is pending.
  15050. This fixes a bug where any circuit that _wasn't_ unusable for new
  15051. streams would be treated as if it were, causing extra circuits to
  15052. be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
  15053. o Minor bugfixes:
  15054. - Avoid a crash bug when starting with a corrupted microdescriptor
  15055. cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
  15056. - If we fail to dump a previously cached microdescriptor to disk, avoid
  15057. freeing duplicate data later on. Fixes bug 10423; bugfix on
  15058. 0.2.4.13-alpha. Spotted by "bobnomnom".
  15059. Changes in version 0.2.4.19 - 2013-12-11
  15060. The Tor 0.2.4 release series is dedicated to the memory of Aaron Swartz
  15061. (1986-2013). Aaron worked on diverse projects including helping to guide
  15062. Creative Commons, playing a key role in stopping SOPA/PIPA, bringing
  15063. transparency to the U.S government's PACER documents, and contributing
  15064. design and development for Tor and Tor2Web. Aaron was one of the latest
  15065. martyrs in our collective fight for civil liberties and human rights,
  15066. and his death is all the more painful because he was one of us.
  15067. Tor 0.2.4.19, the first stable release in the 0.2.4 branch, features
  15068. a new circuit handshake and link encryption that use ECC to provide
  15069. better security and efficiency; makes relays better manage circuit
  15070. creation requests; uses "directory guards" to reduce client enumeration
  15071. risks; makes bridges collect and report statistics about the pluggable
  15072. transports they support; cleans up and improves our geoip database;
  15073. gets much closer to IPv6 support for clients, bridges, and relays; makes
  15074. directory authorities use measured bandwidths rather than advertised
  15075. ones when computing flags and thresholds; disables client-side DNS
  15076. caching to reduce tracking risks; and fixes a big bug in bridge
  15077. reachability testing. This release introduces two new design
  15078. abstractions in the code: a new "channel" abstraction between circuits
  15079. and or_connections to allow for implementing alternate relay-to-relay
  15080. transports, and a new "circuitmux" abstraction storing the queue of
  15081. circuits for a channel. The release also includes many stability,
  15082. security, and privacy fixes.
  15083. Changes in version 0.2.4.18-rc - 2013-11-16
  15084. Tor 0.2.4.18-rc is the fourth release candidate for the Tor 0.2.4.x
  15085. series. It takes a variety of fixes from the 0.2.5.x branch to improve
  15086. stability, performance, and better handling of edge cases.
  15087. o Major features:
  15088. - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
  15089. Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
  15090. 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
  15091. renegotiation from working with TLS 1.1 or 1.2, so we had disabled
  15092. them to solve bug 6033.)
  15093. o Major bugfixes:
  15094. - No longer stop reading or writing on cpuworker connections when
  15095. our rate limiting buckets go empty. Now we should handle circuit
  15096. handshake requests more promptly. Resolves bug 9731.
  15097. - If we are unable to save a microdescriptor to the journal, do not
  15098. drop it from memory and then reattempt downloading it. Fixes bug
  15099. 9645; bugfix on 0.2.2.6-alpha.
  15100. - Stop trying to bootstrap all our directory information from
  15101. only our first guard. Discovered while fixing bug 9946; bugfix
  15102. on 0.2.4.8-alpha.
  15103. - The new channel code sometimes lost track of in-progress circuits,
  15104. causing long-running clients to stop building new circuits. The
  15105. fix is to always call circuit_n_chan_done(chan, 0) from
  15106. channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
  15107. o Minor bugfixes (on 0.2.4.x):
  15108. - Correctly log long IPv6 exit policies, instead of truncating them
  15109. or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
  15110. - Our default TLS ecdhe groups were backwards: we meant to be using
  15111. P224 for relays (for performance win) and P256 for bridges (since
  15112. it is more common in the wild). Instead we had it backwards. After
  15113. reconsideration, we decided that the default should be P256 on all
  15114. hosts, since its security is probably better, and since P224 is
  15115. reportedly used quite little in the wild. Found by "skruffy" on
  15116. IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
  15117. - Free directory authority certificate download statuses on exit
  15118. rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
  15119. o Minor bugfixes (on 0.2.3.x and earlier):
  15120. - If the guard we choose first doesn't answer, we would try the
  15121. second guard, but once we connected to the second guard we would
  15122. abandon it and retry the first one, slowing down bootstrapping.
  15123. The fix is to treat all our initially chosen guards as acceptable
  15124. to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
  15125. - Fix an assertion failure that would occur when disabling the
  15126. ORPort setting on a running Tor process while accounting was
  15127. enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
  15128. - When examining the list of network interfaces to find our address,
  15129. do not consider non-running or disabled network interfaces. Fixes
  15130. bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
  15131. - Avoid an off-by-one error when checking buffer boundaries when
  15132. formatting the exit status of a pluggable transport helper.
  15133. This is probably not an exploitable bug, but better safe than
  15134. sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
  15135. Pedro Ribeiro.
  15136. o Minor features (protecting client timestamps):
  15137. - Clients no longer send timestamps in their NETINFO cells. These were
  15138. not used for anything, and they provided one small way for clients
  15139. to be distinguished from each other as they moved from network to
  15140. network or behind NAT. Implements part of proposal 222.
  15141. - Clients now round timestamps in INTRODUCE cells down to the nearest
  15142. 10 minutes. If a new Support022HiddenServices option is set to 0, or
  15143. if it's set to "auto" and the feature is disabled in the consensus,
  15144. the timestamp is sent as 0 instead. Implements part of proposal 222.
  15145. - Stop sending timestamps in AUTHENTICATE cells. This is not such
  15146. a big deal from a security point of view, but it achieves no actual
  15147. good purpose, and isn't needed. Implements part of proposal 222.
  15148. - Reduce down accuracy of timestamps in hidden service descriptors.
  15149. Implements part of proposal 222.
  15150. o Minor features (other):
  15151. - Improve the circuit queue out-of-memory handler. Previously, when
  15152. we ran low on memory, we'd close whichever circuits had the most
  15153. queued cells. Now, we close those that have the *oldest* queued
  15154. cells, on the theory that those are most responsible for us
  15155. running low on memory. Based on analysis from a forthcoming paper
  15156. by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
  15157. - Generate bootstrapping status update events correctly when fetching
  15158. microdescriptors. Fixes bug 9927.
  15159. - Update to the October 2 2013 Maxmind GeoLite Country database.
  15160. o Documentation fixes:
  15161. - Clarify the usage and risks of setting the ContactInfo torrc line
  15162. for your relay or bridge. Resolves ticket 9854.
  15163. - Add anchors to the manpage so we can link to the html version of
  15164. the documentation for specific options. Resolves ticket 9866.
  15165. - Replace remaining references to DirServer in man page and
  15166. log entries. Resolves ticket 10124.
  15167. Changes in version 0.2.5.1-alpha - 2013-10-02
  15168. Tor 0.2.5.1-alpha introduces experimental support for syscall sandboxing
  15169. on Linux, allows bridges that offer pluggable transports to report usage
  15170. statistics, fixes many issues to make testing easier, and provides
  15171. a pile of minor features and bugfixes that have been waiting for a
  15172. release of the new branch.
  15173. This is the first alpha release in a new series, so expect there to
  15174. be bugs. Users who would rather test out a more stable branch should
  15175. stay with 0.2.4.x for now.
  15176. o Major features (security):
  15177. - Use the seccomp2 syscall filtering facility on Linux to limit
  15178. which system calls Tor can invoke. This is an experimental,
  15179. Linux-only feature to provide defense-in-depth against unknown
  15180. attacks. To try turning it on, set "Sandbox 1" in your torrc
  15181. file. Please be ready to report bugs. We hope to add support
  15182. for better sandboxing in the future, including more fine-grained
  15183. filters, better division of responsibility, and support for more
  15184. platforms. This work has been done by Cristian-Matei Toader for
  15185. Google Summer of Code.
  15186. - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
  15187. Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
  15188. 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
  15189. renegotiation from working with TLS 1.1 or 1.2, so we had disabled
  15190. them to solve bug 6033.)
  15191. o Major features (other):
  15192. - Add support for passing arguments to managed pluggable transport
  15193. proxies. Implements ticket 3594.
  15194. - Bridges now track GeoIP information and the number of their users
  15195. even when pluggable transports are in use, and report usage
  15196. statistics in their extra-info descriptors. Resolves tickets 4773
  15197. and 5040.
  15198. - Make testing Tor networks bootstrap better: lower directory fetch
  15199. retry schedules and maximum interval without directory requests,
  15200. and raise maximum download tries. Implements ticket 6752.
  15201. - Add make target 'test-network' to run tests on a Chutney network.
  15202. Implements ticket 8530.
  15203. - The ntor handshake is now on-by-default, no matter what the
  15204. directory authorities recommend. Implements ticket 8561.
  15205. o Major bugfixes:
  15206. - Instead of writing destroy cells directly to outgoing connection
  15207. buffers, queue them and intersperse them with other outgoing cells.
  15208. This can prevent a set of resource starvation conditions where too
  15209. many pending destroy cells prevent data cells from actually getting
  15210. delivered. Reported by "oftc_must_be_destroyed". Fixes bug 7912;
  15211. bugfix on 0.2.0.1-alpha.
  15212. - If we are unable to save a microdescriptor to the journal, do not
  15213. drop it from memory and then reattempt downloading it. Fixes bug
  15214. 9645; bugfix on 0.2.2.6-alpha.
  15215. - The new channel code sometimes lost track of in-progress circuits,
  15216. causing long-running clients to stop building new circuits. The
  15217. fix is to always call circuit_n_chan_done(chan, 0) from
  15218. channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
  15219. o Build features:
  15220. - Tor now builds each source file in two modes: a mode that avoids
  15221. exposing identifiers needlessly, and another mode that exposes
  15222. more identifiers for testing. This lets the compiler do better at
  15223. optimizing the production code, while enabling us to take more
  15224. radical measures to let the unit tests test things.
  15225. - The production builds no longer include functions used only in
  15226. the unit tests; all functions exposed from a module only for
  15227. unit-testing are now static in production builds.
  15228. - Add an --enable-coverage configuration option to make the unit
  15229. tests (and a new src/or/tor-cov target) to build with gcov test
  15230. coverage support.
  15231. o Testing:
  15232. - We now have rudimentary function mocking support that our unit
  15233. tests can use to test functions in isolation. Function mocking
  15234. lets the tests temporarily replace a function's dependencies with
  15235. stub functions, so that the tests can check the function without
  15236. invoking the other functions it calls.
  15237. - Add more unit tests for the <circid,channel>->circuit map, and
  15238. the destroy-cell-tracking code to fix bug 7912.
  15239. - Unit tests for failing cases of the TAP onion handshake.
  15240. - More unit tests for address-manipulation functions.
  15241. o Minor features (protecting client timestamps):
  15242. - Clients no longer send timestamps in their NETINFO cells. These were
  15243. not used for anything, and they provided one small way for clients
  15244. to be distinguished from each other as they moved from network to
  15245. network or behind NAT. Implements part of proposal 222.
  15246. - Clients now round timestamps in INTRODUCE cells down to the nearest
  15247. 10 minutes. If a new Support022HiddenServices option is set to 0, or
  15248. if it's set to "auto" and the feature is disabled in the consensus,
  15249. the timestamp is sent as 0 instead. Implements part of proposal 222.
  15250. - Stop sending timestamps in AUTHENTICATE cells. This is not such
  15251. a big deal from a security point of view, but it achieves no actual
  15252. good purpose, and isn't needed. Implements part of proposal 222.
  15253. - Reduce down accuracy of timestamps in hidden service descriptors.
  15254. Implements part of proposal 222.
  15255. o Minor features (config options):
  15256. - Config (torrc) lines now handle fingerprints which are missing
  15257. their initial '$'. Resolves ticket 4341; improvement over 0.0.9pre5.
  15258. - Support a --dump-config option to print some or all of the
  15259. configured options. Mainly useful for debugging the command-line
  15260. option parsing code. Helps resolve ticket 4647.
  15261. - Raise awareness of safer logging: notify user of potentially
  15262. unsafe config options, like logging more verbosely than severity
  15263. "notice" or setting SafeLogging to 0. Resolves ticket 5584.
  15264. - Add a new configuration option TestingV3AuthVotingStartOffset
  15265. that bootstraps a network faster by changing the timing for
  15266. consensus votes. Addresses ticket 8532.
  15267. - Add a new torrc option "ServerTransportOptions" that allows
  15268. bridge operators to pass configuration parameters to their
  15269. pluggable transports. Resolves ticket 8929.
  15270. - The config (torrc) file now accepts bandwidth and space limits in
  15271. bits as well as bytes. (Anywhere that you can say "2 Kilobytes",
  15272. you can now say "16 kilobits", and so on.) Resolves ticket 9214.
  15273. Patch by CharlieB.
  15274. o Minor features (build):
  15275. - Add support for `--library-versions` flag. Implements ticket 6384.
  15276. - Return the "unexpected sendme" warnings to a warn severity, but make
  15277. them rate limited, to help diagnose ticket 8093.
  15278. - Detect a missing asciidoc, and warn the user about it, during
  15279. configure rather than at build time. Fixes issue 6506. Patch from
  15280. Arlo Breault.
  15281. o Minor features (other):
  15282. - Use the SOCK_NONBLOCK socket type, if supported, to open nonblocking
  15283. sockets in a single system call. Implements ticket 5129.
  15284. - Log current accounting state (bytes sent and received + remaining
  15285. time for the current accounting period) in the relay's heartbeat
  15286. message. Implements ticket 5526; patch from Peter Retzlaff.
  15287. - Implement the TRANSPORT_LAUNCHED control port event that
  15288. notifies controllers about new launched pluggable
  15289. transports. Resolves ticket 5609.
  15290. - If we're using the pure-C 32-bit curve25519_donna implementation
  15291. of curve25519, build it with the -fomit-frame-pointer option to
  15292. make it go faster on register-starved hosts. This improves our
  15293. handshake performance by about 6% on i386 hosts without nacl.
  15294. Closes ticket 8109.
  15295. - Update to the September 4 2013 Maxmind GeoLite Country database.
  15296. o Minor bugfixes:
  15297. - Set the listen() backlog limit to the largest actually supported
  15298. on the system, not to the value in a header file. Fixes bug 9716;
  15299. bugfix on every released Tor.
  15300. - No longer accept malformed http headers when parsing urls from
  15301. headers. Now we reply with Bad Request ("400"). Fixes bug 2767;
  15302. bugfix on 0.0.6pre1.
  15303. - In munge_extrainfo_into_routerinfo(), check the return value of
  15304. memchr(). This would have been a serious issue if we ever passed
  15305. it a non-extrainfo. Fixes bug 8791; bugfix on 0.2.0.6-alpha. Patch
  15306. from Arlo Breault.
  15307. - On the chance that somebody manages to build Tor on a
  15308. platform where time_t is unsigned, correct the way that
  15309. microdesc_add_to_cache() handles negative time arguments.
  15310. Fixes bug 8042; bugfix on 0.2.3.1-alpha.
  15311. - Reject relative control socket paths and emit a warning. Previously,
  15312. single-component control socket paths would be rejected, but Tor
  15313. would not log why it could not validate the config. Fixes bug 9258;
  15314. bugfix on 0.2.3.16-alpha.
  15315. o Minor bugfixes (command line):
  15316. - Use a single command-line parser for parsing torrc options on the
  15317. command line and for finding special command-line options to avoid
  15318. inconsistent behavior for torrc option arguments that have the same
  15319. names as command-line options. Fixes bugs 4647 and 9578; bugfix on
  15320. 0.0.9pre5.
  15321. - No longer allow 'tor --hash-password' with no arguments. Fixes bug
  15322. 9573; bugfix on 0.0.9pre5.
  15323. o Minor fixes (build, auxiliary programs):
  15324. - Stop preprocessing the "torify" script with autoconf, since
  15325. it no longer refers to LOCALSTATEDIR. Fixes bug 5505; patch
  15326. from Guilhem.
  15327. - The tor-fw-helper program now follows the standard convention and
  15328. exits with status code "0" on success. Fixes bug 9030; bugfix on
  15329. 0.2.3.1-alpha. Patch by Arlo Breault.
  15330. - Corrected ./configure advice for what openssl dev package you should
  15331. install on Debian. Fixes bug 9207; bugfix on 0.2.0.1-alpha.
  15332. o Minor code improvements:
  15333. - Remove constants and tests for PKCS1 padding; it's insecure and
  15334. shouldn't be used for anything new. Fixes bug 8792; patch
  15335. from Arlo Breault.
  15336. - Remove instances of strcpy() from the unit tests. They weren't
  15337. hurting anything, since they were only in the unit tests, but it's
  15338. embarrassing to have strcpy() in the code at all, and some analysis
  15339. tools don't like it. Fixes bug 8790; bugfix on 0.2.3.6-alpha and
  15340. 0.2.3.8-alpha. Patch from Arlo Breault.
  15341. o Removed features:
  15342. - Remove migration code from when we renamed the "cached-routers"
  15343. file to "cached-descriptors" back in 0.2.0.8-alpha. This
  15344. incidentally resolves ticket 6502 by cleaning up the related code
  15345. a bit. Patch from Akshay Hebbar.
  15346. o Code simplification and refactoring:
  15347. - Extract the common duplicated code for creating a subdirectory
  15348. of the data directory and writing to a file in it. Fixes ticket
  15349. 4282; patch from Peter Retzlaff.
  15350. - Since OpenSSL 0.9.7, the i2d_*() functions support allocating output
  15351. buffer. Avoid calling twice: i2d_RSAPublicKey(), i2d_DHparams(),
  15352. i2d_X509(), and i2d_PublicKey(). Resolves ticket 5170.
  15353. - Add a set of accessor functions for the circuit timeout data
  15354. structure. Fixes ticket 6153; patch from "piet".
  15355. - Clean up exit paths from connection_listener_new(). Closes ticket
  15356. 8789. Patch from Arlo Breault.
  15357. - Since we rely on OpenSSL 0.9.8 now, we can use EVP_PKEY_cmp()
  15358. and drop our own custom pkey_eq() implementation. Fixes bug 9043.
  15359. - Use a doubly-linked list to implement the global circuit list.
  15360. Resolves ticket 9108. Patch from Marek Majkowski.
  15361. - Remove contrib/id_to_fp.c since it wasn't used anywhere.
  15362. Changes in version 0.2.4.17-rc - 2013-09-05
  15363. Tor 0.2.4.17-rc is the third release candidate for the Tor 0.2.4.x
  15364. series. It adds an emergency step to help us tolerate the massive
  15365. influx of users: 0.2.4 clients using the new (faster and safer) "NTor"
  15366. circuit-level handshakes now effectively jump the queue compared to
  15367. the 0.2.3 clients using "TAP" handshakes. This release also fixes a
  15368. big bug hindering bridge reachability tests.
  15369. o Major features:
  15370. - Relays now process the new "NTor" circuit-level handshake requests
  15371. with higher priority than the old "TAP" circuit-level handshake
  15372. requests. We still process some TAP requests to not totally starve
  15373. 0.2.3 clients when NTor becomes popular. A new consensus parameter
  15374. "NumNTorsPerTAP" lets us tune the balance later if we need to.
  15375. Implements ticket 9574.
  15376. o Major bugfixes:
  15377. - If the circuit build timeout logic is disabled (via the consensus,
  15378. or because we are an authority), then don't build testing circuits.
  15379. Fixes bug 9657; bugfix on 0.2.2.14-alpha.
  15380. - Bridges now send AUTH_CHALLENGE cells during their v3 handshakes;
  15381. previously they did not, which prevented them from receiving
  15382. successful connections from relays for self-test or bandwidth
  15383. testing. Also, when a relay is extending a circuit to a bridge,
  15384. it needs to send a NETINFO cell, even when the bridge hasn't sent
  15385. an AUTH_CHALLENGE cell. Fixes bug 9546; bugfix on 0.2.3.6-alpha.
  15386. - If the time to download the next old-style networkstatus is in
  15387. the future, do not decline to consider whether to download the
  15388. next microdescriptor networkstatus. Fixes bug 9564; bugfix on
  15389. 0.2.3.14-alpha.
  15390. o Minor bugfixes:
  15391. - Avoid double-closing the listener socket in our socketpair()
  15392. replacement (used on Windows) in the case where the addresses on
  15393. our opened sockets don't match what we expected. Fixes bug 9400;
  15394. bugfix on 0.0.2pre7. Found by Coverity.
  15395. o Minor fixes (config options):
  15396. - Avoid overflows when the user sets MaxCircuitDirtiness to a
  15397. ridiculously high value, by imposing a (ridiculously high) 30-day
  15398. maximum on MaxCircuitDirtiness.
  15399. - Fix the documentation of HeartbeatPeriod to say that the heartbeat
  15400. message is logged at notice, not at info.
  15401. - Warn and fail if a server is configured not to advertise any
  15402. ORPorts at all. (We need *something* to put in our descriptor,
  15403. or we just won't work.)
  15404. o Minor features:
  15405. - Track how many "TAP" and "NTor" circuit handshake requests we get,
  15406. and how many we complete, and log it every hour to help relay
  15407. operators follow trends in network load. Addresses ticket 9658.
  15408. - Update to the August 7 2013 Maxmind GeoLite Country database.
  15409. Changes in version 0.2.4.16-rc - 2013-08-10
  15410. Tor 0.2.4.16-rc is the second release candidate for the Tor 0.2.4.x
  15411. series. It fixes several crash bugs in the 0.2.4 branch.
  15412. o Major bugfixes:
  15413. - Fix a bug in the voting algorithm that could yield incorrect results
  15414. when a non-naming authority declared too many flags. Fixes bug 9200;
  15415. bugfix on 0.2.0.3-alpha.
  15416. - Fix an uninitialized read that could in some cases lead to a remote
  15417. crash while parsing INTRODUCE2 cells. Bugfix on 0.2.4.1-alpha.
  15418. Anybody running a hidden service on the experimental 0.2.4.x
  15419. branch should upgrade. (This is, so far as we know, unrelated to
  15420. the recent news.)
  15421. - Avoid an assertion failure when processing DNS replies without the
  15422. answer types we expected. Fixes bug 9337; bugfix on 0.2.4.7-alpha.
  15423. - Avoid a crash when using --hash-password. Fixes bug 9295; bugfix on
  15424. 0.2.4.15-rc. Found by stem integration tests.
  15425. o Minor bugfixes:
  15426. - Fix an invalid memory read that occurred when a pluggable
  15427. transport proxy failed its configuration protocol.
  15428. Fixes bug 9288; bugfix on 0.2.4.1-alpha.
  15429. - When evaluating whether to use a connection that we haven't
  15430. decided is canonical using a recent link protocol version,
  15431. decide that it's canonical only if it used address _does_
  15432. match the desired address. Fixes bug 9309; bugfix on
  15433. 0.2.4.4-alpha. Reported by skruffy.
  15434. - Make the default behavior of NumDirectoryGuards be to track
  15435. NumEntryGuards. Now a user who changes only NumEntryGuards will get
  15436. the behavior she expects. Fixes bug 9354; bugfix on 0.2.4.8-alpha.
  15437. - Fix a spurious compilation warning with some older versions of
  15438. GCC on FreeBSD. Fixes bug 9254; bugfix on 0.2.4.14-alpha.
  15439. o Minor features:
  15440. - Update to the July 3 2013 Maxmind GeoLite Country database.
  15441. Changes in version 0.2.4.15-rc - 2013-07-01
  15442. Tor 0.2.4.15-rc is the first release candidate for the Tor 0.2.4.x
  15443. series. It fixes a few smaller bugs, but generally appears stable.
  15444. Please test it and let us know whether it is!
  15445. o Major bugfixes:
  15446. - When receiving a new configuration file via the control port's
  15447. LOADCONF command, do not treat the defaults file as absent.
  15448. Fixes bug 9122; bugfix on 0.2.3.9-alpha.
  15449. o Minor features:
  15450. - Issue a warning when running with the bufferevents backend enabled.
  15451. It's still not stable, and people should know that they're likely
  15452. to hit unexpected problems. Closes ticket 9147.
  15453. Changes in version 0.2.4.14-alpha - 2013-06-18
  15454. Tor 0.2.4.14-alpha fixes a pair of client guard enumeration problems
  15455. present in 0.2.4.13-alpha.
  15456. o Major bugfixes:
  15457. - When we have too much memory queued in circuits (according to a new
  15458. MaxMemInCellQueues option), close the circuits consuming the most
  15459. memory. This prevents us from running out of memory as a relay if
  15460. circuits fill up faster than they can be drained. Fixes bug 9063;
  15461. bugfix on the 54th commit of Tor. This bug is a further fix beyond
  15462. bug 6252, whose fix was merged into 0.2.3.21-rc.
  15463. This change also fixes an earlier approach taken in 0.2.4.13-alpha,
  15464. where we tried to solve this issue simply by imposing an upper limit
  15465. on the number of queued cells for a single circuit. That approach
  15466. proved to be problematic, since there are ways to provoke clients to
  15467. send a number of cells in excess of any such reasonable limit. Fixes
  15468. bug 9072; bugfix on 0.2.4.13-alpha.
  15469. - Limit hidden service descriptors to at most ten introduction
  15470. points, to slow one kind of guard enumeration. Fixes bug 9002;
  15471. bugfix on 0.1.1.11-alpha.
  15472. Changes in version 0.2.4.13-alpha - 2013-06-14
  15473. Tor 0.2.4.13-alpha fixes a variety of potential remote crash
  15474. vulnerabilities, makes socks5 username/password circuit isolation
  15475. actually actually work (this time for sure!), and cleans up a bunch
  15476. of other issues in preparation for a release candidate.
  15477. o Major bugfixes (robustness):
  15478. - Close any circuit that has too many cells queued on it. Fixes
  15479. bug 9063; bugfix on the 54th commit of Tor. This bug is a further
  15480. fix beyond bug 6252, whose fix was merged into 0.2.3.21-rc.
  15481. - Prevent the get_freelists() function from running off the end of
  15482. the list of freelists if it somehow gets an unrecognized
  15483. allocation. Fixes bug 8844; bugfix on 0.2.0.16-alpha. Reported by
  15484. eugenis.
  15485. - Avoid an assertion failure on OpenBSD (and perhaps other BSDs)
  15486. when an exit connection with optimistic data succeeds immediately
  15487. rather than returning EINPROGRESS. Fixes bug 9017; bugfix on
  15488. 0.2.3.1-alpha.
  15489. - Fix a directory authority crash bug when building a consensus
  15490. using an older consensus as its basis. Fixes bug 8833. Bugfix
  15491. on 0.2.4.12-alpha.
  15492. o Major bugfixes:
  15493. - Avoid a memory leak where we would leak a consensus body when we
  15494. find that a consensus which we couldn't previously verify due to
  15495. missing certificates is now verifiable. Fixes bug 8719; bugfix
  15496. on 0.2.0.10-alpha.
  15497. - We used to always request authority certificates by identity digest,
  15498. meaning we'd get the newest one even when we wanted one with a
  15499. different signing key. Then we would complain about being given
  15500. a certificate we already had, and never get the one we really
  15501. wanted. Now we use the "fp-sk/" resource as well as the "fp/"
  15502. resource to request the one we want. Fixes bug 5595; bugfix on
  15503. 0.2.0.8-alpha.
  15504. - Follow the socks5 protocol when offering username/password
  15505. authentication. The fix for bug 8117 exposed this bug, and it
  15506. turns out real-world applications like Pidgin do care. Bugfix on
  15507. 0.2.3.2-alpha; fixes bug 8879.
  15508. - Prevent failures on Windows Vista and later when rebuilding the
  15509. microdescriptor cache. Diagnosed by Robert Ransom. Fixes bug 8822;
  15510. bugfix on 0.2.4.12-alpha.
  15511. o Minor bugfixes:
  15512. - Fix an impossible buffer overrun in the AES unit tests. Fixes
  15513. bug 8845; bugfix on 0.2.0.7-alpha. Found by eugenis.
  15514. - If for some reason we fail to write a microdescriptor while
  15515. rebuilding the cache, do not let the annotations from that
  15516. microdescriptor linger in the cache file, and do not let the
  15517. microdescriptor stay recorded as present in its old location.
  15518. Fixes bug 9047; bugfix on 0.2.2.6-alpha.
  15519. - Fix a memory leak that would occur whenever a configuration
  15520. option changed. Fixes bug 8718; bugfix on 0.2.3.3-alpha.
  15521. - Paste the description for PathBias parameters from the man
  15522. page into or.h, so the code documents them too. Fixes bug 7982;
  15523. bugfix on 0.2.3.17-beta and 0.2.4.8-alpha.
  15524. - Relays now treat a changed IPv6 ORPort as sufficient reason to
  15525. publish an updated descriptor. Fixes bug 6026; bugfix on
  15526. 0.2.4.1-alpha.
  15527. - When launching a resolve request on behalf of an AF_UNIX control
  15528. socket, omit the address field of the new entry connection, used in
  15529. subsequent controller events, rather than letting tor_dup_addr()
  15530. set it to "<unknown address type>". Fixes bug 8639; bugfix on
  15531. 0.2.4.12-alpha.
  15532. o Minor bugfixes (log messages):
  15533. - Fix a scaling issue in the path bias accounting code that
  15534. resulted in "Bug:" log messages from either
  15535. pathbias_scale_close_rates() or pathbias_count_build_success().
  15536. This represents a bugfix on a previous bugfix: the original fix
  15537. attempted in 0.2.4.10-alpha was incomplete. Fixes bug 8235; bugfix
  15538. on 0.2.4.1-alpha.
  15539. - Give a less useless error message when the user asks for an IPv4
  15540. address on an IPv6-only port, or vice versa. Fixes bug 8846; bugfix
  15541. on 0.2.4.7-alpha.
  15542. o Minor features:
  15543. - Downgrade "unexpected SENDME" warnings to protocol-warn for 0.2.4.x,
  15544. to tolerate bug 8093 for now.
  15545. - Add an "ignoring-advertised-bws" boolean to the flag-threshold lines
  15546. in directory authority votes to describe whether they have enough
  15547. measured bandwidths to ignore advertised (relay descriptor)
  15548. bandwidth claims. Resolves ticket 8711.
  15549. - Update to the June 5 2013 Maxmind GeoLite Country database.
  15550. o Removed documentation:
  15551. - Remove some of the older contents of doc/ as obsolete; move others
  15552. to torspec.git. Fixes bug 8965.
  15553. o Code simplification and refactoring:
  15554. - Avoid using character buffers when constructing most directory
  15555. objects: this approach was unwieldy and error-prone. Instead,
  15556. build smartlists of strings, and concatenate them when done.
  15557. Changes in version 0.2.4.12-alpha - 2013-04-18
  15558. Tor 0.2.4.12-alpha moves Tor forward on several fronts: it starts the
  15559. process for lengthening the guard rotation period, makes directory
  15560. authority opinions in the consensus a bit less gameable, makes socks5
  15561. username/password circuit isolation actually work, and fixes a wide
  15562. variety of other issues.
  15563. o Major features:
  15564. - Raise the default time that a client keeps an entry guard from
  15565. "1-2 months" to "2-3 months", as suggested by Tariq Elahi's WPES
  15566. 2012 paper. (We would make it even longer, but we need better client
  15567. load balancing first.) Also, make the guard lifetime controllable
  15568. via a new GuardLifetime torrc option and a GuardLifetime consensus
  15569. parameter. Start of a fix for bug 8240; bugfix on 0.1.1.11-alpha.
  15570. - Directory authorities now prefer using measured bandwidths to
  15571. advertised ones when computing flags and thresholds. Resolves
  15572. ticket 8273.
  15573. - Directory authorities that have more than a threshold number
  15574. of relays with measured bandwidths now treat relays with unmeasured
  15575. bandwidths as having bandwidth 0. Resolves ticket 8435.
  15576. o Major bugfixes (assert / resource use):
  15577. - Avoid a bug where our response to TLS renegotiation under certain
  15578. network conditions could lead to a busy-loop, with 100% CPU
  15579. consumption. Fixes bug 5650; bugfix on 0.2.0.16-alpha.
  15580. - Avoid an assertion when we discover that we'd like to write a cell
  15581. onto a closing connection: just discard the cell. Fixes another
  15582. case of bug 7350; bugfix on 0.2.4.4-alpha.
  15583. o Major bugfixes (client-side privacy):
  15584. - When we mark a circuit as unusable for new circuits, have it
  15585. continue to be unusable for new circuits even if MaxCircuitDirtiness
  15586. is increased too much at the wrong time, or the system clock jumps
  15587. backwards. Fixes bug 6174; bugfix on 0.0.2pre26.
  15588. - If ClientDNSRejectInternalAddresses ("do not believe DNS queries
  15589. which have resolved to internal addresses") is set, apply that
  15590. rule to IPv6 as well. Fixes bug 8475; bugfix on 0.2.0.7-alpha.
  15591. - When an exit relay rejects a stream with reason "exit policy", but
  15592. we only know an exit policy summary (e.g. from the microdesc
  15593. consensus) for it, do not mark the relay as useless for all exiting.
  15594. Instead, mark just the circuit as unsuitable for that particular
  15595. address. Fixes part of bug 7582; bugfix on 0.2.3.2-alpha.
  15596. - Allow applications to get proper stream isolation with
  15597. IsolateSOCKSAuth. Many SOCKS5 clients that want to offer
  15598. username/password authentication also offer "no authentication". Tor
  15599. had previously preferred "no authentication", so the applications
  15600. never actually sent Tor their auth details. Now Tor selects
  15601. username/password authentication if it's offered. You can disable
  15602. this behavior on a per-SOCKSPort basis via PreferSOCKSNoAuth. Fixes
  15603. bug 8117; bugfix on 0.2.3.3-alpha.
  15604. o Major bugfixes (other):
  15605. - When unable to find any working directory nodes to use as a
  15606. directory guard, give up rather than adding the same non-working
  15607. nodes to the directory guard list over and over. Fixes bug 8231;
  15608. bugfix on 0.2.4.8-alpha.
  15609. o Minor features:
  15610. - Reject as invalid most directory objects containing a NUL.
  15611. Belt-and-suspender fix for bug 8037.
  15612. - In our testsuite, create temporary directories with a bit more
  15613. entropy in their name to make name collisions less likely. Fixes
  15614. bug 8638.
  15615. - Add CACHED keyword to ADDRMAP events in the control protocol
  15616. to indicate whether a DNS result will be cached or not. Resolves
  15617. ticket 8596.
  15618. - Update to the April 3 2013 Maxmind GeoLite Country database.
  15619. o Minor features (build):
  15620. - Detect and reject attempts to build Tor with threading support
  15621. when OpenSSL has been compiled without threading support.
  15622. Fixes bug 6673.
  15623. - Clarify that when autoconf is checking for nacl, it is checking
  15624. specifically for nacl with a fast curve25519 implementation.
  15625. Fixes bug 8014.
  15626. - Warn if building on a platform with an unsigned time_t: there
  15627. are too many places where Tor currently assumes that time_t can
  15628. hold negative values. We'd like to fix them all, but probably
  15629. some will remain.
  15630. o Minor bugfixes (build):
  15631. - Fix some bugs in tor-fw-helper-natpmp when trying to build and
  15632. run it on Windows. More bugs likely remain. Patch from Gisle Vanem.
  15633. Fixes bug 7280; bugfix on 0.2.3.1-alpha.
  15634. - Add the old src/or/micro-revision.i filename to CLEANFILES.
  15635. On the off chance that somebody has one, it will go away as soon
  15636. as they run "make clean". Fix for bug 7143; bugfix on 0.2.4.1-alpha.
  15637. - Build Tor correctly on 32-bit platforms where the compiler can build
  15638. but not run code using the "uint128_t" construction. Fixes bug 8587;
  15639. bugfix on 0.2.4.8-alpha.
  15640. - Fix compilation warning with some versions of clang that would
  15641. prefer the -Wswitch-enum compiler flag to warn about switch
  15642. statements with missing enum values, even if those switch
  15643. statements have a "default:" statement. Fixes bug 8598; bugfix
  15644. on 0.2.4.10-alpha.
  15645. o Minor bugfixes (protocol):
  15646. - Fix the handling of a TRUNCATE cell when it arrives while the
  15647. circuit extension is in progress. Fixes bug 7947; bugfix on 0.0.7.1.
  15648. - Fix a misframing issue when reading the version numbers in a
  15649. VERSIONS cell. Previously we would recognize [00 01 00 02] as
  15650. 'version 1, version 2, and version 0x100', when it should have
  15651. only included versions 1 and 2. Fixes bug 8059; bugfix on
  15652. 0.2.0.10-alpha. Reported pseudonymously.
  15653. - Make the format and order of STREAM events for DNS lookups
  15654. consistent among the various ways to launch DNS lookups. Fixes
  15655. bug 8203; bugfix on 0.2.0.24-rc. Patch by "Desoxy".
  15656. - Correct our check for which versions of Tor support the EXTEND2
  15657. cell. We had been willing to send it to Tor 0.2.4.7-alpha and
  15658. later, when support was really added in version 0.2.4.8-alpha.
  15659. Fixes bug 8464; bugfix on 0.2.4.8-alpha.
  15660. o Minor bugfixes (other):
  15661. - Correctly store microdescriptors and extrainfo descriptors with
  15662. an internal NUL byte. Fixes bug 8037; bugfix on 0.2.0.1-alpha.
  15663. Bug reported by "cypherpunks".
  15664. - Increase the width of the field used to remember a connection's
  15665. link protocol version to two bytes. Harmless for now, since the
  15666. only currently recognized versions are one byte long. Reported
  15667. pseudonymously. Fixes bug 8062; bugfix on 0.2.0.10-alpha.
  15668. - If the state file's path bias counts are invalid (presumably from a
  15669. buggy Tor prior to 0.2.4.10-alpha), make them correct. Also add
  15670. additional checks and log messages to the scaling of Path Bias
  15671. counts, in case there still are remaining issues with scaling.
  15672. Should help resolve bug 8235.
  15673. - Eliminate several instances where we use "Nickname=ID" to refer to
  15674. nodes in logs. Use "Nickname (ID)" instead. (Elsewhere, we still use
  15675. "$ID=Nickname", which is also acceptable.) Fixes bug 7065. Bugfix
  15676. on 0.2.3.21-rc, 0.2.4.5-alpha, 0.2.4.8-alpha, and 0.2.4.10-alpha.
  15677. o Minor bugfixes (syscalls):
  15678. - Always check the return values of functions fcntl() and
  15679. setsockopt(). We don't believe these are ever actually failing in
  15680. practice, but better safe than sorry. Also, checking these return
  15681. values should please analysis tools like Coverity. Patch from
  15682. 'flupzor'. Fixes bug 8206; bugfix on all versions of Tor.
  15683. - Use direct writes rather than stdio when building microdescriptor
  15684. caches, in an attempt to mitigate bug 8031, or at least make it
  15685. less common.
  15686. o Minor bugfixes (config):
  15687. - When rejecting a configuration because we were unable to parse a
  15688. quoted string, log an actual error message. Fixes bug 7950; bugfix
  15689. on 0.2.0.16-alpha.
  15690. - Behave correctly when the user disables LearnCircuitBuildTimeout
  15691. but doesn't tell us what they would like the timeout to be. Fixes
  15692. bug 6304; bugfix on 0.2.2.14-alpha.
  15693. - When autodetecting the number of CPUs, use the number of available
  15694. CPUs in preference to the number of configured CPUs. Inform the
  15695. user if this reduces the number of available CPUs. Fixes bug 8002;
  15696. bugfix on 0.2.3.1-alpha.
  15697. - Make it an error when you set EntryNodes but disable UseGuardNodes,
  15698. since it will (surprisingly to some users) ignore EntryNodes. Fixes
  15699. bug 8180; bugfix on 0.2.3.11-alpha.
  15700. - Allow TestingTorNetworks to override the 4096-byte minimum for
  15701. the Fast threshold. Otherwise they can't bootstrap until they've
  15702. observed more traffic. Fixes bug 8508; bugfix on 0.2.4.10-alpha.
  15703. - Fix some logic errors when the user manually overrides the
  15704. PathsNeededToBuildCircuits option in torrc. Fixes bug 8599; bugfix
  15705. on 0.2.4.10-alpha.
  15706. o Minor bugfixes (log messages to help diagnose bugs):
  15707. - If we fail to free a microdescriptor because of bug 7164, log
  15708. the filename and line number from which we tried to free it.
  15709. - Add another diagnostic to the heartbeat message: track and log
  15710. overhead that TLS is adding to the data we write. If this is
  15711. high, we are sending too little data to SSL_write at a time.
  15712. Diagnostic for bug 7707.
  15713. - Add more detail to a log message about relaxed timeouts, to help
  15714. track bug 7799.
  15715. - Warn more aggressively when flushing microdescriptors to a
  15716. microdescriptor cache fails, in an attempt to mitigate bug 8031,
  15717. or at least make it more diagnosable.
  15718. - Improve debugging output to help track down bug 8185 ("Bug:
  15719. outgoing relay cell has n_chan==NULL. Dropping.")
  15720. - Log the purpose of a path-bias testing circuit correctly.
  15721. Improves a log message from bug 8477; bugfix on 0.2.4.8-alpha.
  15722. o Minor bugfixes (0.2.4.x log messages that were too noisy):
  15723. - Don't attempt to relax the timeout of already opened 1-hop circuits.
  15724. They might never timeout. This should eliminate some/all cases of
  15725. the relaxed timeout log message.
  15726. - Use circuit creation time for network liveness evaluation. This
  15727. should eliminate warning log messages about liveness caused
  15728. by changes in timeout evaluation. Fixes bug 6572; bugfix on
  15729. 0.2.4.8-alpha.
  15730. - Reduce a path bias length check from notice to info. The message
  15731. is triggered when creating controller circuits. Fixes bug 8196;
  15732. bugfix on 0.2.4.8-alpha.
  15733. - Fix a path state issue that triggered a notice during relay startup.
  15734. Fixes bug 8320; bugfix on 0.2.4.10-alpha.
  15735. - Reduce occurrences of warns about circuit purpose in
  15736. connection_ap_expire_building(). Fixes bug 8477; bugfix on
  15737. 0.2.4.11-alpha.
  15738. o Minor bugfixes (pre-0.2.4.x log messages that were too noisy):
  15739. - If we encounter a write failure on a SOCKS connection before we
  15740. finish our SOCKS handshake, don't warn that we closed the
  15741. connection before we could send a SOCKS reply. Fixes bug 8427;
  15742. bugfix on 0.1.0.1-rc.
  15743. - Correctly recognize that [::1] is a loopback address. Fixes
  15744. bug 8377; bugfix on 0.2.1.3-alpha.
  15745. - Fix a directory authority warn caused when we have a large amount
  15746. of badexit bandwidth. Fixes bug 8419; bugfix on 0.2.2.10-alpha.
  15747. - Don't log inappropriate heartbeat messages when hibernating: a
  15748. hibernating node is _expected_ to drop out of the consensus,
  15749. decide it isn't bootstrapped, and so forth. Fixes bug 7302;
  15750. bugfix on 0.2.3.1-alpha.
  15751. - Don't complain about bootstrapping problems while hibernating.
  15752. These complaints reflect a general code problem, but not one
  15753. with any problematic effects (no connections are actually
  15754. opened). Fixes part of bug 7302; bugfix on 0.2.3.2-alpha.
  15755. o Documentation fixes:
  15756. - Update tor-fw-helper.1.txt and tor-fw-helper.c to make option
  15757. names match. Fixes bug 7768.
  15758. - Make the torify manpage no longer refer to tsocks; torify hasn't
  15759. supported tsocks since 0.2.3.14-alpha.
  15760. - Make the tor manpage no longer reference tsocks.
  15761. - Fix the GeoIPExcludeUnknown documentation to refer to
  15762. ExcludeExitNodes rather than the currently nonexistent
  15763. ExcludeEntryNodes. Spotted by "hamahangi" on tor-talk.
  15764. o Removed files:
  15765. - The tor-tsocks.conf is no longer distributed or installed. We
  15766. recommend that tsocks users use torsocks instead. Resolves
  15767. ticket 8290.
  15768. Changes in version 0.2.4.11-alpha - 2013-03-11
  15769. Tor 0.2.4.11-alpha makes relay measurement by directory authorities
  15770. more robust, makes hidden service authentication work again, and
  15771. resolves a DPI fingerprint for Tor's SSL transport.
  15772. o Major features (directory authorities):
  15773. - Directory authorities now support a new consensus method (17)
  15774. where they cap the published bandwidth of servers for which
  15775. insufficient bandwidth measurements exist. Fixes part of bug 2286.
  15776. - Directory authorities that set "DisableV2DirectoryInfo_ 1" no longer
  15777. serve any v2 directory information. Now we can test disabling the
  15778. old deprecated v2 directory format, and see whether doing so has
  15779. any effect on network load. Begins to fix bug 6783.
  15780. - Directory authorities now include inside each vote a statement of
  15781. the performance thresholds they used when assigning flags.
  15782. Implements ticket 8151.
  15783. o Major bugfixes (directory authorities):
  15784. - Stop marking every relay as having been down for one hour every
  15785. time we restart a directory authority. These artificial downtimes
  15786. were messing with our Stable and Guard flag calculations. Fixes
  15787. bug 8218 (introduced by the fix for 1035). Bugfix on 0.2.2.23-alpha.
  15788. o Major bugfixes (hidden services):
  15789. - Allow hidden service authentication to succeed again. When we
  15790. refactored the hidden service introduction code back
  15791. in 0.2.4.1-alpha, we didn't update the code that checks
  15792. whether authentication information is present, causing all
  15793. authentication checks to return "false". Fix for bug 8207; bugfix
  15794. on 0.2.4.1-alpha. Found by Coverity; this is CID 718615.
  15795. o Minor features (relays, bridges):
  15796. - Make bridge relays check once a minute for whether their IP
  15797. address has changed, rather than only every 15 minutes. Resolves
  15798. bugs 1913 and 1992.
  15799. - Refactor resolve_my_address() so it returns the method by which we
  15800. decided our public IP address (explicitly configured, resolved from
  15801. explicit hostname, guessed from interfaces, learned by gethostname).
  15802. Now we can provide more helpful log messages when a relay guesses
  15803. its IP address incorrectly (e.g. due to unexpected lines in
  15804. /etc/hosts). Resolves ticket 2267.
  15805. - Teach bridge-using clients to avoid 0.2.2 bridges when making
  15806. microdescriptor-related dir requests, and only fall back to normal
  15807. descriptors if none of their bridges can handle microdescriptors
  15808. (as opposed to the fix in ticket 4013, which caused them to fall
  15809. back to normal descriptors if *any* of their bridges preferred
  15810. them). Resolves ticket 4994.
  15811. - Randomize the lifetime of our SSL link certificate, so censors can't
  15812. use the static value for filtering Tor flows. Resolves ticket 8443;
  15813. related to ticket 4014 which was included in 0.2.2.33.
  15814. - Support a new version of the link protocol that allows 4-byte circuit
  15815. IDs. Previously, circuit IDs were limited to 2 bytes, which presented
  15816. a possible resource exhaustion issue. Closes ticket 7351; implements
  15817. proposal 214.
  15818. o Minor features (portability):
  15819. - Tweak the curve25519-donna*.c implementations to tolerate systems
  15820. that lack stdint.h. Fixes bug 3894; bugfix on 0.2.4.8-alpha.
  15821. - Use Ville Laurikari's implementation of AX_CHECK_SIGN() to determine
  15822. the signs of types during autoconf. This is better than our old
  15823. approach, which didn't work when cross-compiling.
  15824. - Detect the sign of enum values, rather than assuming that MSC is the
  15825. only compiler where enum types are all signed. Fixes bug 7727;
  15826. bugfix on 0.2.4.10-alpha.
  15827. o Minor features (other):
  15828. - Say "KBytes" rather than "KB" in the man page (for various values
  15829. of K), to further reduce confusion about whether Tor counts in
  15830. units of memory or fractions of units of memory. Resolves ticket 7054.
  15831. - Clear the high bit on curve25519 public keys before passing them to
  15832. our backend, in case we ever wind up using a backend that doesn't do
  15833. so itself. If we used such a backend, and *didn't* clear the high bit,
  15834. we could wind up in a situation where users with such backends would
  15835. be distinguishable from users without. Fixes bug 8121; bugfix on
  15836. 0.2.4.8-alpha.
  15837. - Update to the March 6 2013 Maxmind GeoLite Country database.
  15838. o Minor bugfixes (clients):
  15839. - When we receive a RELAY_END cell with the reason DONE, or with no
  15840. reason, before receiving a RELAY_CONNECTED cell, report the SOCKS
  15841. status as "connection refused". Previously we reported these cases
  15842. as success but then immediately closed the connection. Fixes bug
  15843. 7902; bugfix on 0.1.0.1-rc. Reported by "oftc_must_be_destroyed".
  15844. - Downgrade an assertion in connection_ap_expire_beginning to an
  15845. LD_BUG message. The fix for bug 8024 should prevent this message
  15846. from displaying, but just in case, a warn that we can diagnose
  15847. is better than more assert crashes. Fixes bug 8065; bugfix on
  15848. 0.2.4.8-alpha.
  15849. - Lower path use bias thresholds to .80 for notice and .60 for warn.
  15850. Also make the rate limiting flags for the path use bias log messages
  15851. independent from the original path bias flags. Fixes bug 8161;
  15852. bugfix on 0.2.4.10-alpha.
  15853. o Minor bugfixes (relays):
  15854. - Stop trying to resolve our hostname so often (e.g. every time we
  15855. think about doing a directory fetch). Now we reuse the cached
  15856. answer in some cases. Fixes bugs 1992 (bugfix on 0.2.0.20-rc)
  15857. and 2410 (bugfix on 0.1.2.2-alpha).
  15858. - Stop sending a stray "(null)" in some cases for the server status
  15859. "EXTERNAL_ADDRESS" controller event. Resolves bug 8200; bugfix
  15860. on 0.1.2.6-alpha.
  15861. - When choosing which stream on a formerly stalled circuit to wake
  15862. first, make better use of the platform's weak RNG. Previously,
  15863. we had been using the % ("modulo") operator to try to generate a
  15864. 1/N chance of picking each stream, but this behaves badly with
  15865. many platforms' choice of weak RNG. Fixes bug 7801; bugfix on
  15866. 0.2.2.20-alpha.
  15867. - Use our own weak RNG when we need a weak RNG. Windows's rand() and
  15868. Irix's random() only return 15 bits; Solaris's random() returns more
  15869. bits but its RAND_MAX says it only returns 15, and so on. Motivated
  15870. by the fix for bug 7801; bugfix on 0.2.2.20-alpha.
  15871. o Minor bugfixes (directory authorities):
  15872. - Directory authorities now use less space when formatting identical
  15873. microdescriptor lines in directory votes. Fixes bug 8158; bugfix
  15874. on 0.2.4.1-alpha.
  15875. o Minor bugfixes (memory leaks spotted by Coverity -- bug 7816):
  15876. - Avoid leaking memory if we fail to compute a consensus signature
  15877. or we generate a consensus we can't parse. Bugfix on 0.2.0.5-alpha.
  15878. - Fix a memory leak when receiving headers from an HTTPS proxy. Bugfix
  15879. on 0.2.1.1-alpha.
  15880. - Fix a memory leak during safe-cookie controller authentication.
  15881. Bugfix on 0.2.3.13-alpha.
  15882. - Avoid memory leak of IPv6 policy content if we fail to format it into
  15883. a router descriptor. Bugfix on 0.2.4.7-alpha.
  15884. o Minor bugfixes (other code correctness issues):
  15885. - Avoid a crash if we fail to generate an extrainfo descriptor.
  15886. Fixes bug 8208; bugfix on 0.2.3.16-alpha. Found by Coverity;
  15887. this is CID 718634.
  15888. - When detecting the largest possible file descriptor (in order to
  15889. close all file descriptors when launching a new program), actually
  15890. use _SC_OPEN_MAX. The old code for doing this was very, very broken.
  15891. Fixes bug 8209; bugfix on 0.2.3.1-alpha. Found by Coverity; this
  15892. is CID 743383.
  15893. - Fix a copy-and-paste error when adding a missing A1 to a routerset
  15894. because of GeoIPExcludeUnknown. Fix for Coverity CID 980650.
  15895. Bugfix on 0.2.4.10-alpha.
  15896. - Fix an impossible-to-trigger integer overflow when estimating how
  15897. long our onionskin queue would take. (This overflow would require us
  15898. to accept 4 million onionskins before processing 100 of them.) Fixes
  15899. bug 8210; bugfix on 0.2.4.10-alpha.
  15900. o Code simplification and refactoring:
  15901. - Add a wrapper function for the common "log a message with a
  15902. rate-limit" case.
  15903. Changes in version 0.2.4.10-alpha - 2013-02-04
  15904. Tor 0.2.4.10-alpha adds defenses at the directory authority level from
  15905. certain attacks that flood the network with relays; changes the queue
  15906. for circuit create requests from a sized-based limit to a time-based
  15907. limit; resumes building with MSVC on Windows; and fixes a wide variety
  15908. of other issues.
  15909. o Major bugfixes (directory authority):
  15910. - When computing directory thresholds, ignore any rejected-as-sybil
  15911. nodes during the computation so that they can't influence Fast,
  15912. Guard, etc. (We should have done this for proposal 109.) Fixes
  15913. bug 8146.
  15914. - When marking a node as a likely sybil, reset its uptime metrics
  15915. to zero, so that it cannot time towards getting marked as Guard,
  15916. Stable, or HSDir. (We should have done this for proposal 109.) Fixes
  15917. bug 8147.
  15918. o Major bugfixes:
  15919. - When a TLS write is partially successful but incomplete, remember
  15920. that the flushed part has been flushed, and notice that bytes were
  15921. actually written. Reported and fixed pseudonymously. Fixes bug
  15922. 7708; bugfix on Tor 0.1.0.5-rc.
  15923. - Reject bogus create and relay cells with 0 circuit ID or 0 stream
  15924. ID: these could be used to create unexpected streams and circuits
  15925. which would count as "present" to some parts of Tor but "absent"
  15926. to others, leading to zombie circuits and streams or to a bandwidth
  15927. denial-of-service. Fixes bug 7889; bugfix on every released version
  15928. of Tor. Reported by "oftc_must_be_destroyed".
  15929. - Rename all macros in our local copy of queue.h to begin with "TOR_".
  15930. This change seems the only good way to permanently prevent conflicts
  15931. with queue.h on various operating systems. Fixes bug 8107; bugfix
  15932. on 0.2.4.6-alpha.
  15933. o Major features (relay):
  15934. - Instead of limiting the number of queued onionskins (aka circuit
  15935. create requests) to a fixed, hard-to-configure number, we limit
  15936. the size of the queue based on how many we expect to be able to
  15937. process in a given amount of time. We estimate the time it will
  15938. take to process an onionskin based on average processing time
  15939. of previous onionskins. Closes ticket 7291. You'll never have to
  15940. configure MaxOnionsPending again.
  15941. o Major features (portability):
  15942. - Resume building correctly with MSVC and Makefile.nmake. This patch
  15943. resolves numerous bugs and fixes reported by ultramage, including
  15944. 7305, 7308, 7309, 7310, 7312, 7313, 7315, 7316, and 7669.
  15945. - Make the ntor and curve25519 code build correctly with MSVC.
  15946. Fix on 0.2.4.8-alpha.
  15947. o Minor features:
  15948. - When directory authorities are computing thresholds for flags,
  15949. never let the threshold for the Fast flag fall below 4096
  15950. bytes. Also, do not consider nodes with extremely low bandwidths
  15951. when deciding thresholds for various directory flags. This change
  15952. should raise our threshold for Fast relays, possibly in turn
  15953. improving overall network performance; see ticket 1854. Resolves
  15954. ticket 8145.
  15955. - The Tor client now ignores sub-domain components of a .onion
  15956. address. This change makes HTTP "virtual" hosting
  15957. possible: http://foo.aaaaaaaaaaaaaaaa.onion/ and
  15958. http://bar.aaaaaaaaaaaaaaaa.onion/ can be two different websites
  15959. hosted on the same hidden service. Implements proposal 204.
  15960. - We compute the overhead from passing onionskins back and forth to
  15961. cpuworkers, and report it when dumping statistics in response to
  15962. SIGUSR1. Supports ticket 7291.
  15963. o Minor features (path selection):
  15964. - When deciding whether we have enough descriptors to build circuits,
  15965. instead of looking at raw relay counts, look at which fraction
  15966. of (bandwidth-weighted) paths we're able to build. This approach
  15967. keeps clients from building circuits if their paths are likely to
  15968. stand out statistically. The default fraction of paths needed is
  15969. taken from the consensus directory; you can override it with the
  15970. new PathsNeededToBuildCircuits option. Fixes ticket 5956.
  15971. - When any country code is listed in ExcludeNodes or ExcludeExitNodes,
  15972. and we have GeoIP information, also exclude all nodes with unknown
  15973. countries "??" and "A1". This behavior is controlled by the
  15974. new GeoIPExcludeUnknown option: you can make such nodes always
  15975. excluded with "GeoIPExcludeUnknown 1", and disable the feature
  15976. with "GeoIPExcludeUnknown 0". Setting "GeoIPExcludeUnknown auto"
  15977. gets you the default behavior. Implements feature 7706.
  15978. - Path Use Bias: Perform separate accounting for successful circuit
  15979. use. Keep separate statistics on stream attempt rates versus stream
  15980. success rates for each guard. Provide configurable thresholds to
  15981. determine when to emit log messages or disable use of guards that
  15982. fail too many stream attempts. Resolves ticket 7802.
  15983. o Minor features (log messages):
  15984. - When learning a fingerprint for a bridge, log its corresponding
  15985. transport type. Implements ticket 7896.
  15986. - Improve the log message when "Bug/attack: unexpected sendme cell
  15987. from client" occurs, to help us track bug 8093.
  15988. o Minor bugfixes:
  15989. - Remove a couple of extraneous semicolons that were upsetting the
  15990. cparser library. Patch by Christian Grothoff. Fixes bug 7115;
  15991. bugfix on 0.2.2.1-alpha.
  15992. - Remove a source of rounding error during path bias count scaling;
  15993. don't count cannibalized circuits as used for path bias until we
  15994. actually try to use them; and fix a circuit_package_relay_cell()
  15995. warning message about n_chan==NULL. Fixes bug 7802.
  15996. - Detect nacl when its headers are in a nacl/ subdirectory. Also,
  15997. actually link against nacl when we're configured to use it. Fixes
  15998. bug 7972; bugfix on 0.2.4.8-alpha.
  15999. - Compile correctly with the --disable-curve25519 option. Fixes
  16000. bug 8153; bugfix on 0.2.4.8-alpha.
  16001. o Build improvements:
  16002. - Do not report status verbosely from autogen.sh unless the -v flag
  16003. is specified. Fixes issue 4664. Patch from Onizuka.
  16004. - Replace all calls to snprintf() outside of src/ext with
  16005. tor_snprintf(). Also remove the #define to replace snprintf with
  16006. _snprintf on Windows; they have different semantics, and all of
  16007. our callers should be using tor_snprintf() anyway. Fixes bug 7304.
  16008. - Try to detect if we are ever building on a platform where
  16009. memset(...,0,...) does not set the value of a double to 0.0. Such
  16010. platforms are permitted by the C standard, though in practice
  16011. they're pretty rare (since IEEE 754 is nigh-ubiquitous). We don't
  16012. currently support them, but it's better to detect them and fail
  16013. than to perform erroneously.
  16014. o Removed features:
  16015. - Stop exporting estimates of v2 and v3 directory traffic shares
  16016. in extrainfo documents. They were unneeded and sometimes inaccurate.
  16017. Also stop exporting any v2 directory request statistics. Resolves
  16018. ticket 5823.
  16019. - Drop support for detecting and warning about versions of Libevent
  16020. before 1.3e. Nothing reasonable ships with them any longer;
  16021. warning the user about them shouldn't be needed. Resolves ticket
  16022. 6826.
  16023. o Code simplifications and refactoring:
  16024. - Rename "isin" functions to "contains", for grammar. Resolves
  16025. ticket 5285.
  16026. - Rename Tor's logging function log() to tor_log(), to avoid conflicts
  16027. with the natural logarithm function from the system libm. Resolves
  16028. ticket 7599.
  16029. Changes in version 0.2.4.9-alpha - 2013-01-15
  16030. Tor 0.2.4.9-alpha provides a quick fix to make the new ntor handshake
  16031. work more robustly.
  16032. o Major bugfixes:
  16033. - Fix backward compatibility logic when receiving an embedded ntor
  16034. handshake tunneled in a CREATE cell. This clears up the "Bug:
  16035. couldn't format CREATED cell" warning. Fixes bug 7959; bugfix
  16036. on 0.2.4.8-alpha.
  16037. Changes in version 0.2.4.8-alpha - 2013-01-14
  16038. Tor 0.2.4.8-alpha introduces directory guards to reduce user enumeration
  16039. risks, adds a new stronger and faster circuit handshake, and offers
  16040. stronger and faster link encryption when both sides support it.
  16041. o Major features:
  16042. - Preliminary support for directory guards (proposal 207): when
  16043. possible, clients now use their entry guards for non-anonymous
  16044. directory requests. This can help prevent client enumeration. Note
  16045. that this behavior only works when we have a usable consensus
  16046. directory, and when options about what to download are more or less
  16047. standard. In the future we should re-bootstrap from our guards,
  16048. rather than re-bootstrapping from the preconfigured list of
  16049. directory sources that ships with Tor. Resolves ticket 6526.
  16050. - Tor relays and clients now support a better CREATE/EXTEND cell
  16051. format, allowing the sender to specify multiple address, identity,
  16052. and handshake types. Implements Robert Ransom's proposal 200;
  16053. closes ticket 7199.
  16054. o Major features (new circuit handshake):
  16055. - Tor now supports a new circuit extension handshake designed by Ian
  16056. Goldberg, Douglas Stebila, and Berkant Ustaoglu. Our original
  16057. circuit extension handshake, later called "TAP", was a bit slow
  16058. (especially on the relay side), had a fragile security proof, and
  16059. used weaker keys than we'd now prefer. The new circuit handshake
  16060. uses Dan Bernstein's "curve25519" elliptic-curve Diffie-Hellman
  16061. function, making it significantly more secure than the older
  16062. handshake, and significantly faster. Tor can use one of two built-in
  16063. pure-C curve25519-donna implementations by Adam Langley, or it
  16064. can link against the "nacl" library for a tuned version if present.
  16065. The built-in version is very fast for 64-bit systems when building
  16066. with GCC. The built-in 32-bit version is still faster than the
  16067. old TAP protocol, but using libnacl is better on most such hosts.
  16068. Clients don't currently use this protocol by default, since
  16069. comparatively few clients support it so far. To try it, set
  16070. UseNTorHandshake to 1.
  16071. Implements proposal 216; closes ticket 7202.
  16072. o Major features (better link encryption):
  16073. - Relays can now enable the ECDHE TLS ciphersuites when available
  16074. and appropriate. These ciphersuites let us negotiate forward-secure
  16075. TLS secret keys more safely and more efficiently than with our
  16076. previous use of Diffie-Hellman modulo a 1024-bit prime. By default,
  16077. public relays prefer the (faster) P224 group, and bridges prefer
  16078. the (more common) P256 group; you can override this with the
  16079. TLSECGroup option.
  16080. Enabling these ciphers was a little tricky, since for a long time,
  16081. clients had been claiming to support them without actually doing
  16082. so, in order to foil fingerprinting. But with the client-side
  16083. implementation of proposal 198 in 0.2.3.17-beta, clients can now
  16084. match the ciphers from recent Firefox versions *and* list the
  16085. ciphers they actually mean, so relays can believe such clients
  16086. when they advertise ECDHE support in their TLS ClientHello messages.
  16087. This feature requires clients running 0.2.3.17-beta or later,
  16088. and requires both sides to be running OpenSSL 1.0.0 or later
  16089. with ECC support. OpenSSL 1.0.1, with the compile-time option
  16090. "enable-ec_nistp_64_gcc_128", is highly recommended.
  16091. Implements the relay side of proposal 198; closes ticket 7200.
  16092. o Major bugfixes:
  16093. - Avoid crashing when, as a relay without IPv6-exit support, a
  16094. client insists on getting an IPv6 address or nothing. Fixes bug
  16095. 7814; bugfix on 0.2.4.7-alpha.
  16096. o Minor features:
  16097. - Improve circuit build timeout handling for hidden services.
  16098. In particular: adjust build timeouts more accurately depending
  16099. upon the number of hop-RTTs that a particular circuit type
  16100. undergoes. Additionally, launch intro circuits in parallel
  16101. if they timeout, and take the first one to reply as valid.
  16102. - Work correctly on Unix systems where EAGAIN and EWOULDBLOCK are
  16103. separate error codes; or at least, don't break for that reason.
  16104. Fixes bug 7935. Reported by "oftc_must_be_destroyed".
  16105. - Update to the January 2 2013 Maxmind GeoLite Country database.
  16106. o Minor features (testing):
  16107. - Add benchmarks for DH (1024-bit multiplicative group) and ECDH
  16108. (P-256) Diffie-Hellman handshakes to src/or/bench.
  16109. - Add benchmark functions to test onion handshake performance.
  16110. o Minor features (path bias detection):
  16111. - Alter the Path Bias log messages to be more descriptive in terms
  16112. of reporting timeouts and other statistics.
  16113. - Create three levels of Path Bias log messages, as opposed to just
  16114. two. These are configurable via consensus as well as via the torrc
  16115. options PathBiasNoticeRate, PathBiasWarnRate, PathBiasExtremeRate.
  16116. The default values are 0.70, 0.50, and 0.30 respectively.
  16117. - Separate the log message levels from the decision to drop guards,
  16118. which also is available via torrc option PathBiasDropGuards.
  16119. PathBiasDropGuards still defaults to 0 (off).
  16120. - Deprecate PathBiasDisableRate in favor of PathBiasDropGuards
  16121. in combination with PathBiasExtremeRate.
  16122. - Increase the default values for PathBiasScaleThreshold and
  16123. PathBiasCircThreshold from (200, 20) to (300, 150).
  16124. - Add in circuit usage accounting to path bias. If we try to use a
  16125. built circuit but fail for any reason, it counts as path bias.
  16126. Certain classes of circuits where the adversary gets to pick your
  16127. destination node are exempt from this accounting. Usage accounting
  16128. can be specifically disabled via consensus parameter or torrc.
  16129. - Convert all internal path bias state to double-precision floating
  16130. point, to avoid roundoff error and other issues.
  16131. - Only record path bias information for circuits that have completed
  16132. *two* hops. Assuming end-to-end tagging is the attack vector, this
  16133. makes us more resilient to ambient circuit failure without any
  16134. detection capability loss.
  16135. o Minor bugfixes (log messages):
  16136. - Rate-limit the "No circuits are opened. Relaxed timeout for a
  16137. circuit with channel state open..." message to once per hour to
  16138. keep it from filling the notice logs. Mitigates bug 7799 but does
  16139. not fix the underlying cause. Bugfix on 0.2.4.7-alpha.
  16140. - Avoid spurious warnings when configuring multiple client ports of
  16141. which only some are nonlocal. Previously, we had claimed that some
  16142. were nonlocal when in fact they weren't. Fixes bug 7836; bugfix on
  16143. 0.2.3.3-alpha.
  16144. o Code simplifications and refactoring:
  16145. - Get rid of a couple of harmless clang warnings, where we compared
  16146. enums to ints. These warnings are newly introduced in clang 3.2.
  16147. - Split the onion.c file into separate modules for the onion queue
  16148. and the different handshakes it supports.
  16149. - Remove the marshalling/unmarshalling code for sending requests to
  16150. cpuworkers over a socket, and instead just send structs. The
  16151. recipient will always be the same Tor binary as the sender, so
  16152. any encoding is overkill.
  16153. Changes in version 0.2.4.7-alpha - 2012-12-24
  16154. Tor 0.2.4.7-alpha introduces a new approach to providing fallback
  16155. directory mirrors for more robust bootstrapping; fixes more issues where
  16156. clients with changing network conditions refuse to make any circuits;
  16157. adds initial support for exiting to IPv6 addresses; resumes being able
  16158. to update our GeoIP database, and includes the geoip6 file this time;
  16159. turns off the client-side DNS cache by default due to privacy risks;
  16160. and fixes a variety of other issues.
  16161. o Major features (client resilience):
  16162. - Add a new "FallbackDir" torrc option to use when we can't use
  16163. a directory mirror from the consensus (either because we lack a
  16164. consensus, or because they're all down). Currently, all authorities
  16165. are fallbacks by default, and there are no other default fallbacks,
  16166. but that will change. This option will allow us to give clients a
  16167. longer list of servers to try to get a consensus from when first
  16168. connecting to the Tor network, and thereby reduce load on the
  16169. directory authorities. Implements proposal 206, "Preconfigured
  16170. directory sources for bootstrapping". We also removed the old
  16171. "FallbackNetworkstatus" option, since we never got it working well
  16172. enough to use it. Closes bug 572.
  16173. - If we have no circuits open, use a relaxed timeout (the
  16174. 95-percentile cutoff) until a circuit succeeds. This heuristic
  16175. should allow Tor to succeed at building circuits even when the
  16176. network connection drastically changes. Should help with bug 3443.
  16177. o Major features (IPv6):
  16178. - Relays can now exit to IPv6 addresses: make sure that you have IPv6
  16179. connectivity, then set the IPv6Exit flag to 1. Also make sure your
  16180. exit policy reads as you would like: the address * applies to all
  16181. address families, whereas *4 is IPv4 address only, and *6 is IPv6
  16182. addresses only. On the client side, you'll need to wait until the
  16183. authorities have upgraded, wait for enough exits to support IPv6,
  16184. apply the "IPv6Traffic" flag to a SocksPort, and use Socks5. Closes
  16185. ticket 5547, implements proposal 117 as revised in proposal 208.
  16186. We DO NOT recommend that clients with actual anonymity needs start
  16187. using IPv6 over Tor yet, since not enough exits support it yet.
  16188. o Major features (geoip database):
  16189. - Maxmind began labelling Tor relays as being in country "A1",
  16190. which breaks by-country node selection inside Tor. Now we use a
  16191. script to replace "A1" ("Anonymous Proxy") entries in our geoip
  16192. file with real country codes. This script fixes about 90% of "A1"
  16193. entries automatically and uses manual country code assignments to
  16194. fix the remaining 10%. See src/config/README.geoip for details.
  16195. Fixes bug 6266. Also update to the December 5 2012 Maxmind GeoLite
  16196. Country database, as modified above.
  16197. o Major bugfixes (client-side DNS):
  16198. - Turn off the client-side DNS cache by default. Updating and using
  16199. the DNS cache is now configurable on a per-client-port
  16200. level. SOCKSPort, DNSPort, etc lines may now contain
  16201. {No,}Cache{IPv4,IPv6,}DNS lines to indicate that we shouldn't
  16202. cache these types of DNS answers when we receive them from an
  16203. exit node in response to an application request on this port, and
  16204. {No,}UseCached{IPv4,IPv6,DNS} lines to indicate that if we have
  16205. cached DNS answers of these types, we shouldn't use them. It's
  16206. potentially risky to use cached DNS answers at the client, since
  16207. doing so can indicate to one exit what answers we've gotten
  16208. for DNS lookups in the past. With IPv6, this becomes especially
  16209. problematic. Using cached DNS answers for requests on the same
  16210. circuit would present less linkability risk, since all traffic
  16211. on a circuit is already linkable, but it would also provide
  16212. little performance benefit: the exit node caches DNS replies
  16213. too. Implements a simplified version of Proposal 205. Implements
  16214. ticket 7570.
  16215. o Major bugfixes (other):
  16216. - Alter circuit build timeout measurement to start at the point
  16217. where we begin the CREATE/CREATE_FAST step (as opposed to circuit
  16218. initialization). This should make our timeout measurements more
  16219. uniform. Previously, we were sometimes including ORconn setup time
  16220. in our circuit build time measurements. Should resolve bug 3443.
  16221. - Fix an assertion that could trigger in hibernate_go_dormant() when
  16222. closing an or_connection_t: call channel_mark_for_close() rather
  16223. than connection_mark_for_close(). Fixes bug 7267. Bugfix on
  16224. 0.2.4.4-alpha.
  16225. - Include the geoip6 IPv6 GeoIP database in the tarball. Fixes bug
  16226. 7655; bugfix on 0.2.4.6-alpha.
  16227. o Minor features:
  16228. - Add a new torrc option "ServerTransportListenAddr" to let bridge
  16229. operators select the address where their pluggable transports will
  16230. listen for connections. Resolves ticket 7013.
  16231. - Allow an optional $ before the node identity digest in the
  16232. controller command GETINFO ns/id/<identity>, for consistency with
  16233. md/id/<identity> and desc/id/<identity>. Resolves ticket 7059.
  16234. - Log packaged cell fullness as part of the heartbeat message.
  16235. Diagnosis to try to determine the extent of bug 7743.
  16236. o Minor features (IPv6):
  16237. - AutomapHostsOnResolve now supports IPv6 addresses. By default, we
  16238. prefer to hand out virtual IPv6 addresses, since there are more of
  16239. them and we can't run out. To override this behavior and make IPv4
  16240. addresses preferred, set NoPreferIPv6Automap on whatever SOCKSPort
  16241. or DNSPort you're using for resolving. Implements ticket 7571.
  16242. - AutomapHostsOnResolve responses are now randomized, to avoid
  16243. annoying situations where Tor is restarted and applications
  16244. connect to the wrong addresses.
  16245. - Never try more than 1000 times to pick a new virtual address when
  16246. AutomapHostsOnResolve is set. That's good enough so long as we
  16247. aren't close to handing out our entire virtual address space;
  16248. if you're getting there, it's best to switch to IPv6 virtual
  16249. addresses anyway.
  16250. o Minor bugfixes:
  16251. - The ADDRMAP command can no longer generate an ill-formed error
  16252. code on a failed MAPADDRESS. It now says "internal" rather than
  16253. an English sentence fragment with spaces in the middle. Bugfix on
  16254. Tor 0.2.0.19-alpha.
  16255. - Fix log messages and comments to avoid saying "GMT" when we mean
  16256. "UTC". Fixes bug 6113.
  16257. - Compile on win64 using mingw64. Fixes bug 7260; patches from
  16258. "yayooo".
  16259. - Fix a crash when debugging unit tests on Windows: deallocate a
  16260. shared library with FreeLibrary, not CloseHandle. Fixes bug 7306;
  16261. bugfix on 0.2.2.17-alpha. Reported by "ultramage".
  16262. o Renamed options:
  16263. - The DirServer option is now DirAuthority, for consistency with
  16264. current naming patterns. You can still use the old DirServer form.
  16265. o Code simplification and refactoring:
  16266. - Move the client-side address-map/virtual-address/DNS-cache code
  16267. out of connection_edge.c into a new addressmap.c module.
  16268. - Remove unused code for parsing v1 directories and "running routers"
  16269. documents. Fixes bug 6887.
  16270. Changes in version 0.2.3.25 - 2012-11-19
  16271. The Tor 0.2.3 release series is dedicated to the memory of Len "rabbi"
  16272. Sassaman (1980-2011), a long-time cypherpunk, anonymity researcher,
  16273. Mixmaster maintainer, Pynchon Gate co-designer, CodeCon organizer,
  16274. programmer, and friend. Unstinting in his dedication to the cause of
  16275. freedom, he inspired and helped many of us as we began our work on
  16276. anonymity, and inspires us still. Please honor his memory by writing
  16277. software to protect people's freedoms, and by helping others to do so.
  16278. Tor 0.2.3.25, the first stable release in the 0.2.3 branch, features
  16279. significantly reduced directory overhead (via microdescriptors),
  16280. enormous crypto performance improvements for fast relays on new
  16281. enough hardware, a new v3 TLS handshake protocol that can better
  16282. resist fingerprinting, support for protocol obfuscation plugins (aka
  16283. pluggable transports), better scalability for hidden services, IPv6
  16284. support for bridges, performance improvements like allowing clients
  16285. to skip the first round-trip on the circuit ("optimistic data") and
  16286. refilling token buckets more often, a new "stream isolation" design
  16287. to isolate different applications on different circuits, and many
  16288. stability, security, and privacy fixes.
  16289. o Major bugfixes:
  16290. - Tor tries to wipe potentially sensitive data after using it, so
  16291. that if some subsequent security failure exposes Tor's memory,
  16292. the damage will be limited. But we had a bug where the compiler
  16293. was eliminating these wipe operations when it decided that the
  16294. memory was no longer visible to a (correctly running) program,
  16295. hence defeating our attempt at defense in depth. We fix that
  16296. by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
  16297. is unlikely to optimize away. Future versions of Tor may use
  16298. a less ridiculously heavy approach for this. Fixes bug 7352.
  16299. Reported in an article by Andrey Karpov.
  16300. o Minor bugfixes:
  16301. - Fix a harmless bug when opting against publishing a relay descriptor
  16302. because DisableNetwork is set. Fixes bug 7464; bugfix on
  16303. 0.2.3.9-alpha.
  16304. Changes in version 0.2.4.6-alpha - 2012-11-13
  16305. Tor 0.2.4.6-alpha fixes an assert bug that has been plaguing relays,
  16306. makes our defense-in-depth memory wiping more reliable, and begins to
  16307. count IPv6 addresses in bridge statistics,
  16308. o Major bugfixes:
  16309. - Fix an assertion failure that could occur when closing a connection
  16310. with a spliced rendezvous circuit. Fix for bug 7212; bugfix on
  16311. Tor 0.2.4.4-alpha.
  16312. - Tor tries to wipe potentially sensitive data after using it, so
  16313. that if some subsequent security failure exposes Tor's memory,
  16314. the damage will be limited. But we had a bug where the compiler
  16315. was eliminating these wipe operations when it decided that the
  16316. memory was no longer visible to a (correctly running) program,
  16317. hence defeating our attempt at defense in depth. We fix that
  16318. by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
  16319. is unlikely to optimize away. Future versions of Tor may use
  16320. a less ridiculously heavy approach for this. Fixes bug 7352.
  16321. Reported in an article by Andrey Karpov.
  16322. o Minor features:
  16323. - Add GeoIP database for IPv6 addresses. The new config option
  16324. is GeoIPv6File.
  16325. - Bridge statistics now count bridge clients connecting over IPv6:
  16326. bridge statistics files now list "bridge-ip-versions" and
  16327. extra-info documents list "geoip6-db-digest". The control protocol
  16328. "CLIENTS_SEEN" and "ip-to-country" queries now support IPv6. Initial
  16329. implementation by "shkoo", addressing ticket 5055.
  16330. o Minor bugfixes:
  16331. - Warn when we are binding low ports when hibernation is enabled;
  16332. previously we had warned when we were _advertising_ low ports with
  16333. hibernation enabled. Fixes bug 7285; bugfix on 0.2.3.9-alpha.
  16334. - Fix a harmless bug when opting against publishing a relay descriptor
  16335. because DisableNetwork is set. Fixes bug 7464; bugfix on
  16336. 0.2.3.9-alpha.
  16337. - Add warning message when a managed proxy dies during configuration.
  16338. Fixes bug 7195; bugfix on 0.2.4.2-alpha.
  16339. - Fix a linking error when building tor-fw-helper without miniupnp.
  16340. Fixes bug 7235; bugfix on 0.2.4.2-alpha. Fix by Anthony G. Basile.
  16341. - Check for closing an or_connection_t without going through correct
  16342. channel functions; emit a warning and then call
  16343. connection_or_close_for_error() so we don't assert as in bugs 7212
  16344. and 7267.
  16345. - Compile correctly on compilers without C99 designated initializer
  16346. support. Fixes bug 7286; bugfix on 0.2.4.4-alpha.
  16347. - Avoid a possible assert that can occur when channel_send_destroy() is
  16348. called on a channel in CHANNEL_STATE_CLOSING, CHANNEL_STATE_CLOSED,
  16349. or CHANNEL_STATE_ERROR when the Tor process is resumed after being
  16350. blocked for a long interval. Fixes bug 7350; bugfix on 0.2.4.4-alpha.
  16351. - Fix a memory leak on failing cases of channel_tls_process_certs_cell.
  16352. Fixes bug 7422; bugfix on 0.2.4.4-alpha.
  16353. o Code simplification and refactoring:
  16354. - Start using OpenBSD's implementation of queue.h, so that we don't
  16355. need to hand-roll our own pointer and list structures whenever we
  16356. need them. (We can't rely on a sys/queue.h, since some operating
  16357. systems don't have them, and the ones that do have them don't all
  16358. present the same extensions.)
  16359. Changes in version 0.2.4.5-alpha - 2012-10-25
  16360. Tor 0.2.4.5-alpha comes hard at the heels of 0.2.4.4-alpha, to fix
  16361. two important security vulnerabilities that could lead to remotely
  16362. triggerable relay crashes, fix a major bug that was preventing clients
  16363. from choosing suitable exit nodes, and refactor some of our code.
  16364. o Major bugfixes (security, also in 0.2.3.24-rc):
  16365. - Fix a group of remotely triggerable assertion failures related to
  16366. incorrect link protocol negotiation. Found, diagnosed, and fixed
  16367. by "some guy from France". Fix for CVE-2012-2250; bugfix on
  16368. 0.2.3.6-alpha.
  16369. - Fix a denial of service attack by which any directory authority
  16370. could crash all the others, or by which a single v2 directory
  16371. authority could crash everybody downloading v2 directory
  16372. information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
  16373. o Major bugfixes (also in 0.2.3.24-rc):
  16374. - When parsing exit policy summaries from microdescriptors, we had
  16375. previously been ignoring the last character in each one, so that
  16376. "accept 80,443,8080" would be treated by clients as indicating
  16377. a node that allows access to ports 80, 443, and 808. That would
  16378. lead to clients attempting connections that could never work,
  16379. and ignoring exit nodes that would support their connections. Now
  16380. clients parse these exit policy summaries correctly. Fixes bug 7192;
  16381. bugfix on 0.2.3.1-alpha.
  16382. o Minor bugfixes (also in 0.2.3.24-rc):
  16383. - Clients now consider the ClientRejectInternalAddresses config option
  16384. when using a microdescriptor consensus stanza to decide whether
  16385. an exit relay would allow exiting to an internal address. Fixes
  16386. bug 7190; bugfix on 0.2.3.1-alpha.
  16387. o Minor bugfixes:
  16388. - Only disable TLS session ticket support when running as a TLS
  16389. server. Now clients will blend better with regular Firefox
  16390. connections. Fixes bug 7189; bugfix on Tor 0.2.3.23-rc.
  16391. o Code simplification and refactoring:
  16392. - Start using OpenBSD's implementation of queue.h (originally by
  16393. Niels Provos).
  16394. - Move the entry node code from circuitbuild.c to its own file.
  16395. - Move the circuit build timeout tracking code from circuitbuild.c
  16396. to its own file.
  16397. Changes in version 0.2.3.24-rc - 2012-10-25
  16398. Tor 0.2.3.24-rc fixes two important security vulnerabilities that
  16399. could lead to remotely triggerable relay crashes, and fixes
  16400. a major bug that was preventing clients from choosing suitable exit
  16401. nodes.
  16402. o Major bugfixes (security):
  16403. - Fix a group of remotely triggerable assertion failures related to
  16404. incorrect link protocol negotiation. Found, diagnosed, and fixed
  16405. by "some guy from France". Fix for CVE-2012-2250; bugfix on
  16406. 0.2.3.6-alpha.
  16407. - Fix a denial of service attack by which any directory authority
  16408. could crash all the others, or by which a single v2 directory
  16409. authority could crash everybody downloading v2 directory
  16410. information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
  16411. o Major bugfixes:
  16412. - When parsing exit policy summaries from microdescriptors, we had
  16413. previously been ignoring the last character in each one, so that
  16414. "accept 80,443,8080" would be treated by clients as indicating
  16415. a node that allows access to ports 80, 443, and 808. That would
  16416. lead to clients attempting connections that could never work,
  16417. and ignoring exit nodes that would support their connections. Now
  16418. clients parse these exit policy summaries correctly. Fixes bug 7192;
  16419. bugfix on 0.2.3.1-alpha.
  16420. o Minor bugfixes:
  16421. - Clients now consider the ClientRejectInternalAddresses config option
  16422. when using a microdescriptor consensus stanza to decide whether
  16423. an exit relay would allow exiting to an internal address. Fixes
  16424. bug 7190; bugfix on 0.2.3.1-alpha.
  16425. Changes in version 0.2.4.4-alpha - 2012-10-20
  16426. Tor 0.2.4.4-alpha adds a new v3 directory authority, fixes a privacy
  16427. vulnerability introduced by a change in OpenSSL, fixes a remotely
  16428. triggerable assert, and adds new channel_t and circuitmux_t abstractions
  16429. that will make it easier to test new connection transport and cell
  16430. scheduling algorithms.
  16431. o New directory authorities (also in 0.2.3.23-rc):
  16432. - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
  16433. authority. Closes ticket 5749.
  16434. o Major bugfixes (security/privacy, also in 0.2.3.23-rc):
  16435. - Disable TLS session tickets. OpenSSL's implementation was giving
  16436. our TLS session keys the lifetime of our TLS context objects, when
  16437. perfect forward secrecy would want us to discard anything that
  16438. could decrypt a link connection as soon as the link connection
  16439. was closed. Fixes bug 7139; bugfix on all versions of Tor linked
  16440. against OpenSSL 1.0.0 or later. Found by Florent Daignière.
  16441. - Discard extraneous renegotiation attempts once the V3 link
  16442. protocol has been initiated. Failure to do so left us open to
  16443. a remotely triggerable assertion failure. Fixes CVE-2012-2249;
  16444. bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
  16445. o Internal abstraction features:
  16446. - Introduce new channel_t abstraction between circuits and
  16447. or_connection_t to allow for implementing alternate OR-to-OR
  16448. transports. A channel_t is an abstract object which can either be a
  16449. cell-bearing channel, which is responsible for authenticating and
  16450. handshaking with the remote OR and transmitting cells to and from
  16451. it, or a listening channel, which spawns new cell-bearing channels
  16452. at the request of remote ORs. Implements part of ticket 6465.
  16453. - Also new is the channel_tls_t subclass of channel_t, adapting it
  16454. to the existing or_connection_t code. The V2/V3 protocol handshaking
  16455. code which formerly resided in command.c has been moved below the
  16456. channel_t abstraction layer and may be found in channeltls.c now.
  16457. Implements the rest of ticket 6465.
  16458. - Introduce new circuitmux_t storing the queue of circuits for
  16459. a channel; this encapsulates and abstracts the queue logic and
  16460. circuit selection policy, and allows the latter to be overridden
  16461. easily by switching out a policy object. The existing EWMA behavior
  16462. is now implemented as a circuitmux_policy_t. Resolves ticket 6816.
  16463. o Required libraries:
  16464. - Tor now requires OpenSSL 0.9.8 or later. OpenSSL 1.0.0 or later is
  16465. strongly recommended.
  16466. o Minor features:
  16467. - Warn users who run hidden services on a Tor client with
  16468. UseEntryGuards disabled that their hidden services will be
  16469. vulnerable to http://freehaven.net/anonbib/#hs-attack06 (the
  16470. attack which motivated Tor to support entry guards in the first
  16471. place). Resolves ticket 6889.
  16472. - Tor now builds correctly on Bitrig, an OpenBSD fork. Patch from
  16473. dhill. Resolves ticket 6982.
  16474. - Option OutboundBindAddress can be specified multiple times and
  16475. accepts IPv6 addresses. Resolves ticket 6876.
  16476. o Minor bugfixes (also in 0.2.3.23-rc):
  16477. - Don't serve or accept v2 hidden service descriptors over a
  16478. relay's DirPort. It's never correct to do so, and disabling it
  16479. might make it more annoying to exploit any bugs that turn up in the
  16480. descriptor-parsing code. Fixes bug 7149.
  16481. - Fix two cases in src/or/transports.c where we were calling
  16482. fmt_addr() twice in a parameter list. Bug found by David
  16483. Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
  16484. - Fix memory leaks whenever we logged any message about the "path
  16485. bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
  16486. - When relays refuse a "create" cell because their queue of pending
  16487. create cells is too big (typically because their cpu can't keep up
  16488. with the arrival rate), send back reason "resource limit" rather
  16489. than reason "internal", so network measurement scripts can get a
  16490. more accurate picture. Fixes bug 7037; bugfix on 0.1.1.11-alpha.
  16491. o Minor bugfixes:
  16492. - Command-line option "--version" implies "--quiet". Fixes bug 6997.
  16493. - Free some more still-in-use memory at exit, to make hunting for
  16494. memory leaks easier. Resolves bug 7029.
  16495. - When a Tor client gets a "truncated" relay cell, the first byte of
  16496. its payload specifies why the circuit was truncated. We were
  16497. ignoring this 'reason' byte when tearing down the circuit, resulting
  16498. in the controller not being told why the circuit closed. Now we
  16499. pass the reason from the truncated cell to the controller. Bugfix
  16500. on 0.1.2.3-alpha; fixes bug 7039.
  16501. - Downgrade "Failed to hand off onionskin" messages to "debug"
  16502. severity, since they're typically redundant with the "Your computer
  16503. is too slow" messages. Fixes bug 7038; bugfix on 0.2.2.16-alpha.
  16504. - Make clients running with IPv6 bridges connect over IPv6 again,
  16505. even without setting new config options ClientUseIPv6 and
  16506. ClientPreferIPv6ORPort. Fixes bug 6757; bugfix on 0.2.4.1-alpha.
  16507. - Use square brackets around IPv6 addresses in numerous places
  16508. that needed them, including log messages, HTTPS CONNECT proxy
  16509. requests, TransportProxy statefile entries, and pluggable transport
  16510. extra-info lines. Fixes bug 7011; patch by David Fifield.
  16511. o Code refactoring and cleanup:
  16512. - Source files taken from other packages now reside in src/ext;
  16513. previously they were scattered around the rest of Tor.
  16514. - Avoid use of reserved identifiers in our C code. The C standard
  16515. doesn't like us declaring anything that starts with an
  16516. underscore, so let's knock it off before we get in trouble. Fix
  16517. for bug 1031; bugfix on the first Tor commit.
  16518. Changes in version 0.2.3.23-rc - 2012-10-20
  16519. Tor 0.2.3.23-rc adds a new v3 directory authority, fixes a privacy
  16520. vulnerability introduced by a change in OpenSSL, and fixes a variety
  16521. of smaller bugs in preparation for the release.
  16522. o New directory authorities:
  16523. - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
  16524. authority. Closes ticket 5749.
  16525. o Major bugfixes (security/privacy):
  16526. - Disable TLS session tickets. OpenSSL's implementation was giving
  16527. our TLS session keys the lifetime of our TLS context objects, when
  16528. perfect forward secrecy would want us to discard anything that
  16529. could decrypt a link connection as soon as the link connection
  16530. was closed. Fixes bug 7139; bugfix on all versions of Tor linked
  16531. against OpenSSL 1.0.0 or later. Found by Florent Daignière.
  16532. - Discard extraneous renegotiation attempts once the V3 link
  16533. protocol has been initiated. Failure to do so left us open to
  16534. a remotely triggerable assertion failure. Fixes CVE-2012-2249;
  16535. bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
  16536. o Major bugfixes:
  16537. - Fix a possible crash bug when checking for deactivated circuits
  16538. in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
  16539. bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
  16540. o Minor bugfixes (on 0.2.3.x):
  16541. - Fix two cases in src/or/transports.c where we were calling
  16542. fmt_addr() twice in a parameter list. Bug found by David
  16543. Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
  16544. - Convert an assert in the pathbias code to a log message. The assert
  16545. appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
  16546. bugfix on 0.2.3.17-beta.
  16547. - Fix memory leaks whenever we logged any message about the "path
  16548. bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
  16549. o Minor bugfixes (on 0.2.2.x and earlier):
  16550. - Don't serve or accept v2 hidden service descriptors over a relay's
  16551. DirPort. It's never correct to do so, and disabling it might
  16552. make it more annoying to exploit any bugs that turn up in the
  16553. descriptor-parsing code. Fixes bug 7149.
  16554. - When relays refuse a "create" cell because their queue of pending
  16555. create cells is too big (typically because their cpu can't keep up
  16556. with the arrival rate), send back reason "resource limit" rather
  16557. than reason "internal", so network measurement scripts can get a
  16558. more accurate picture. Bugfix on 0.1.1.11-alpha; fixes bug 7037.
  16559. - Correct file sizes when reading binary files on Cygwin, to avoid
  16560. a bug where Tor would fail to read its state file. Fixes bug 6844;
  16561. bugfix on 0.1.2.7-alpha.
  16562. - Avoid undefined behavior when parsing the list of supported
  16563. rendezvous/introduction protocols in a hidden service descriptor.
  16564. Previously, Tor would have confused (as-yet-unused) protocol version
  16565. numbers greater than 32 with lower ones on many platforms. Fixes
  16566. bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
  16567. o Documentation fixes:
  16568. - Clarify that hidden services are TCP only. Fixes bug 6024.
  16569. Changes in version 0.2.4.3-alpha - 2012-09-22
  16570. Tor 0.2.4.3-alpha fixes another opportunity for a remotely triggerable
  16571. assertion, resumes letting relays test reachability of their DirPort,
  16572. and cleans up a bunch of smaller bugs.
  16573. o Security fixes:
  16574. - Fix an assertion failure in tor_timegm() that could be triggered
  16575. by a badly formatted directory object. Bug found by fuzzing with
  16576. Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
  16577. o Major bugfixes:
  16578. - Fix a possible crash bug when checking for deactivated circuits
  16579. in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
  16580. bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
  16581. - Allow routers to detect that their own DirPorts are running. When
  16582. we removed support for versions_supports_begindir, we also
  16583. accidentally removed the mechanism we used to self-test our
  16584. DirPort. Diagnosed with help from kargig. Fixes bugs 6814 and 6815;
  16585. bugfix on 0.2.4.2-alpha.
  16586. o Security features:
  16587. - Switch to a completely time-invariant approach for picking nodes
  16588. weighted by bandwidth. Our old approach would run through the
  16589. part of the loop after it had made its choice slightly slower
  16590. than it ran through the part of the loop before it had made its
  16591. choice. Addresses ticket 6538.
  16592. - Disable the use of Guard nodes when in Tor2WebMode. Guard usage
  16593. by tor2web clients allows hidden services to identify tor2web
  16594. clients through their repeated selection of the same rendezvous
  16595. and introduction point circuit endpoints (their guards). Resolves
  16596. ticket 6888.
  16597. o Minor features:
  16598. - Enable Tor to read configuration, state, and key information from
  16599. a FIFO. Previously Tor would only read from files with a positive
  16600. stat.st_size. Code from meejah; fixes bug 6044.
  16601. o Minor bugfixes:
  16602. - Correct file sizes when reading binary files on Cygwin, to avoid
  16603. a bug where Tor would fail to read its state file. Fixes bug 6844;
  16604. bugfix on 0.1.2.7-alpha.
  16605. - Correctly handle votes with more than 31 flags. Fixes bug 6853;
  16606. bugfix on 0.2.0.3-alpha.
  16607. - When complaining about a client port on a public address, log
  16608. which address we're complaining about. Fixes bug 4020; bugfix on
  16609. 0.2.3.3-alpha. Patch by Tom Fitzhenry.
  16610. - Convert an assert in the pathbias code to a log message. The assert
  16611. appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
  16612. bugfix on 0.2.3.17-beta.
  16613. - Our new buildsystem was overzealous about rebuilding manpages: it
  16614. would rebuild them all whenever any one of them changed. Now our
  16615. dependency checking should be correct. Fixes bug 6843; bugfix on
  16616. 0.2.4.1-alpha.
  16617. - Don't do reachability testing over IPv6 unless AuthDirPublishIPv6
  16618. is set. Fixes bug 6880. Bugfix on 0.2.4.1-alpha.
  16619. - Correct log printout about which address family is preferred
  16620. when connecting to a bridge with both an IPv4 and IPv6 OR port.
  16621. Fixes bug 6884; bugfix on 0.2.4.1-alpha.
  16622. o Minor bugfixes (code cleanliness):
  16623. - Fix round_to_power_of_2() so it doesn't invoke undefined behavior
  16624. with large values. This situation was untriggered, but nevertheless
  16625. incorrect. Fixes bug 6831; bugfix on 0.2.0.1-alpha.
  16626. - Reject consensus votes with more than 64 known-flags. We aren't even
  16627. close to that limit yet, and our code doesn't handle it correctly.
  16628. Fixes bug 6833; bugfix on 0.2.0.1-alpha.
  16629. - Avoid undefined behavior when parsing the list of supported
  16630. rendezvous/introduction protocols in a hidden service descriptor.
  16631. Previously, Tor would have confused (as-yet-unused) protocol version
  16632. numbers greater than 32 with lower ones on many platforms. Fixes
  16633. bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
  16634. - Fix handling of rendezvous client authorization types over 8.
  16635. Fixes bug 6861; bugfix on 0.2.1.5-alpha.
  16636. - Fix building with older versions of GCC (2.95, for one) that don't
  16637. like preprocessor directives inside macro arguments. Found by
  16638. grarpamp. Fixes bug 6842; bugfix on 0.2.4.2-alpha.
  16639. - Switch weighted node selection rule from using a list of doubles
  16640. to using a list of int64_t. This change should make the process
  16641. slightly easier to debug and maintain. Needed to finish ticket 6538.
  16642. o Code simplification and refactoring:
  16643. - Move the generic "config" code into a new file, and have "config.c"
  16644. hold only torrc- and state-related code. Resolves ticket 6823.
  16645. - Move the core of our "choose a weighted element at random" logic
  16646. into its own function, and give it unit tests. Now the logic is
  16647. testable, and a little less fragile too.
  16648. - Removed the testing_since field of node_t, which hasn't been used
  16649. for anything since 0.2.0.9-alpha.
  16650. o Documentation fixes:
  16651. - Clarify that hidden services are TCP only. Fixes bug 6024.
  16652. - Resolve a typo in torrc.sample.in. Fixes bug 6819; bugfix on
  16653. 0.2.3.14-alpha.
  16654. Changes in version 0.2.3.22-rc - 2012-09-11
  16655. Tor 0.2.3.22-rc fixes another opportunity for a remotely triggerable
  16656. assertion.
  16657. o Security fixes:
  16658. - Fix an assertion failure in tor_timegm() that could be triggered
  16659. by a badly formatted directory object. Bug found by fuzzing with
  16660. Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
  16661. o Minor bugfixes:
  16662. - Avoid segfault when starting up having run with an extremely old
  16663. version of Tor and parsing its state file. Fixes bug 6801; bugfix
  16664. on 0.2.2.23-alpha.
  16665. Changes in version 0.2.2.39 - 2012-09-11
  16666. Tor 0.2.2.39 fixes two more opportunities for remotely triggerable
  16667. assertions.
  16668. o Security fixes:
  16669. - Fix an assertion failure in tor_timegm() that could be triggered
  16670. by a badly formatted directory object. Bug found by fuzzing with
  16671. Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
  16672. - Do not crash when comparing an address with port value 0 to an
  16673. address policy. This bug could have been used to cause a remote
  16674. assertion failure by or against directory authorities, or to
  16675. allow some applications to crash clients. Fixes bug 6690; bugfix
  16676. on 0.2.1.10-alpha.
  16677. Changes in version 0.2.4.2-alpha - 2012-09-10
  16678. Tor 0.2.4.2-alpha enables port forwarding for pluggable transports,
  16679. raises the default rate limiting even more, and makes the bootstrapping
  16680. log messages less noisy.
  16681. o Major features:
  16682. - Automatically forward the TCP ports of pluggable transport
  16683. proxies using tor-fw-helper if PortForwarding is enabled. Implements
  16684. ticket 4567.
  16685. o Major bugfixes:
  16686. - Raise the default BandwidthRate/BandwidthBurst values from 5MB/10MB
  16687. to 1GB/1GB. The previous defaults were intended to be "basically
  16688. infinite", but it turns out they're now limiting our 100mbit+
  16689. relays and bridges. Fixes bug 6605; bugfix on 0.2.0.10-alpha (the
  16690. last time we raised it).
  16691. o Minor features:
  16692. - Detect when we're running with a version of OpenSSL other than the
  16693. one we compiled with. This has occasionally given people hard-to-
  16694. track-down errors.
  16695. - Log fewer lines at level "notice" about our OpenSSL and Libevent
  16696. versions and capabilities when everything is going right. Resolves
  16697. part of ticket 6736.
  16698. - Directory authorities no long accept descriptors for any version of
  16699. Tor before 0.2.2.35, or for any 0.2.3 release before 0.2.3.10-alpha.
  16700. These versions are insecure, unsupported, or both. Implements
  16701. ticket 6789.
  16702. o Minor bugfixes:
  16703. - Rename the (internal-use-only) UsingTestingNetworkDefaults option
  16704. to start with a triple-underscore so the controller won't touch it.
  16705. Patch by Meejah. Fixes bug 3155. Bugfix on 0.2.2.23-alpha.
  16706. - Avoid segfault when starting up having run with an extremely old
  16707. version of Tor and parsing its state file. Fixes bug 6801; bugfix
  16708. on 0.2.2.23-alpha.
  16709. - Rename the (testing-use-only) _UseFilteringSSLBufferevents option
  16710. so it doesn't start with _. Fixes bug 3155. Bugfix on 0.2.3.1-alpha.
  16711. - Don't follow the NULL pointer if microdescriptor generation fails.
  16712. (This does not appear to be triggerable, but it's best to be safe.)
  16713. Found by "f. tp.". Fixes bug 6797; bugfix on 0.2.4.1-alpha.
  16714. - Fix mis-declared dependencies on src/common/crypto.c and
  16715. src/or/tor_main.c that could break out-of-tree builds under some
  16716. circumstances. Fixes bug 6778; bugfix on 0.2.4.1-alpha.
  16717. - Avoid a warning when building common_sha1.i out of tree. Fixes bug
  16718. 6778; bugfix on 0.2.4.1-alpha.
  16719. - Fix a harmless (in this case) build warning for implicitly
  16720. converting a strlen() to an int. Bugfix on 0.2.4.1-alpha.
  16721. o Removed features:
  16722. - Now that all versions before 0.2.2.x are disallowed, we no longer
  16723. need to work around their missing features. Thus we can remove a
  16724. bunch of compatibility code.
  16725. o Code refactoring:
  16726. - Tweak tor-fw-helper to accept an arbitrary amount of arbitrary
  16727. TCP ports to forward. In the past it only accepted two ports:
  16728. the ORPort and the DirPort.
  16729. Changes in version 0.2.4.1-alpha - 2012-09-05
  16730. Tor 0.2.4.1-alpha lets bridges publish their pluggable transports to
  16731. bridgedb; lets relays use IPv6 addresses and directory authorities
  16732. advertise them; and switches to a cleaner build interface.
  16733. This is the first alpha release in a new series, so expect there to
  16734. be bugs. Users who would rather test out a more stable branch should
  16735. stay with 0.2.3.x for now.
  16736. o Major features (bridges):
  16737. - Bridges now report the pluggable transports they support to the
  16738. bridge authority, so it can pass the supported transports on to
  16739. bridgedb and/or eventually do reachability testing. Implements
  16740. ticket 3589.
  16741. o Major features (IPv6):
  16742. - Bridge authorities now accept IPv6 bridge addresses and include
  16743. them in network status documents. Implements ticket 5534.
  16744. - Clients who set "ClientUseIPv6 1" may connect to entry nodes over
  16745. IPv6. Set "ClientPreferIPv6ORPort 1" to make this even more likely
  16746. to happen. Implements ticket 5535.
  16747. - All kind of relays, not just bridges, can now advertise an IPv6
  16748. OR port. Implements ticket 6362.
  16749. - Directory authorities vote on IPv6 OR ports using the new consensus
  16750. method 14. Implements ticket 6363.
  16751. o Major features (build):
  16752. - Switch to a nonrecursive Makefile structure. Now instead of each
  16753. Makefile.am invoking other Makefile.am's, there is a master
  16754. Makefile.am that includes the others. This change makes our build
  16755. process slightly more maintainable, and improves parallelism for
  16756. building with make -j. Original patch by Stewart Smith; various
  16757. fixes by Jim Meyering.
  16758. - Where available, we now use automake's "silent" make rules by
  16759. default, so that warnings are easier to spot. You can get the old
  16760. behavior with "make V=1". Patch by Stewart Smith for ticket 6522.
  16761. o Minor features (code security and spec conformance):
  16762. - Clear keys and key-derived material left on the stack in
  16763. rendservice.c and rendclient.c. Check return value of
  16764. crypto_pk_write_private_key_to_string() in rend_service_load_keys().
  16765. These fixes should make us more forward-secure against cold-boot
  16766. attacks and the like. Fixes bug 2385.
  16767. - Reject EXTEND cells sent to nonexistent streams. According to the
  16768. spec, an EXTEND cell sent to _any_ nonzero stream ID is invalid, but
  16769. we were only checking for stream IDs that were currently in use.
  16770. Found while hunting for more instances of bug 6271. Bugfix on
  16771. 0.0.2pre8, which introduced incremental circuit construction.
  16772. o Minor features (streamlining);
  16773. - No longer include the "opt" prefix when generating routerinfos
  16774. or v2 directories: it has been needless since Tor 0.1.2. Closes
  16775. ticket 5124.
  16776. - Remove some now-needless code that tried to aggressively flush
  16777. OR connections as data was added to them. Since 0.2.0.1-alpha, our
  16778. cell queue logic has saved us from the failure mode that this code
  16779. was supposed to prevent. Removing this code will limit the number
  16780. of baroque control flow paths through Tor's network logic. Reported
  16781. pseudonymously on IRC. Fixes bug 6468; bugfix on 0.2.0.1-alpha.
  16782. o Minor features (controller):
  16783. - Add a "GETINFO signal/names" control port command. Implements
  16784. ticket 3842.
  16785. - Provide default values for all options via "GETINFO config/defaults".
  16786. Implements ticket 4971.
  16787. o Minor features (IPv6):
  16788. - New config option "AuthDirHasIPv6Connectivity 1" that directory
  16789. authorities should set if they have IPv6 connectivity and want to
  16790. do reachability tests for IPv6 relays. Implements feature 5974.
  16791. - A relay with an IPv6 OR port now sends that address in NETINFO
  16792. cells (in addition to its other address). Implements ticket 6364.
  16793. o Minor features (log messages):
  16794. - Omit the first heartbeat log message, because it never has anything
  16795. useful to say, and it clutters up the bootstrapping messages.
  16796. Resolves ticket 6758.
  16797. - Don't log about reloading the microdescriptor cache at startup. Our
  16798. bootstrap warnings are supposed to tell the user when there's a
  16799. problem, and our bootstrap notices say when there isn't. Resolves
  16800. ticket 6759; bugfix on 0.2.2.6-alpha.
  16801. - Don't log "I learned some more directory information" when we're
  16802. reading cached directory information. Reserve it for when new
  16803. directory information arrives in response to a fetch. Resolves
  16804. ticket 6760.
  16805. - Prevent rounding error in path bias counts when scaling
  16806. them down, and use the correct scale factor default. Also demote
  16807. some path bias related log messages down a level and make others
  16808. less scary sounding. Fixes bug 6647. Bugfix against 0.2.3.17-beta.
  16809. - We no longer warn so much when generating manpages from their
  16810. asciidoc source.
  16811. o Code simplifications and refactoring:
  16812. - Enhance our internal sscanf replacement so that we can eliminate
  16813. the last remaining uses of the system sscanf. (Though those uses
  16814. of sscanf were safe, sscanf itself is generally error prone, so
  16815. we want to eliminate when we can.) Fixes ticket 4195 and Coverity
  16816. CID 448.
  16817. - Move ipv6_preferred from routerinfo_t to node_t. Addresses bug 4620.
  16818. - Move last_reachable and testing_since from routerinfo_t to node_t.
  16819. Implements ticket 5529.
  16820. - Add replaycache_t structure, functions and unit tests, then refactor
  16821. rend_service_introduce() to be more clear to read, improve, debug,
  16822. and test. Resolves bug 6177.
  16823. - Finally remove support for malloc_good_size and malloc_usable_size.
  16824. We had hoped that these functions would let us eke a little more
  16825. memory out of our malloc implementation. Unfortunately, the only
  16826. implementations that provided these functions are also ones that
  16827. are already efficient about not overallocation: they never got us
  16828. more than 7 or so bytes per allocation. Removing them saves us a
  16829. little code complexity and a nontrivial amount of build complexity.
  16830. o New requirements:
  16831. - Tor maintainers now require Automake version 1.9 or later to build
  16832. Tor from the Git repository. (Automake is not required when building
  16833. from a source distribution.)
  16834. Changes in version 0.2.3.21-rc - 2012-09-05
  16835. Tor 0.2.3.21-rc is the fourth release candidate for the Tor 0.2.3.x
  16836. series. It fixes a trio of potential security bugs, fixes a bug where
  16837. we were leaving some of the fast relays out of the microdescriptor
  16838. consensus, resumes interpreting "ORPort 0" and "DirPort 0" correctly,
  16839. and cleans up other smaller issues.
  16840. o Major bugfixes (security):
  16841. - Tear down the circuit if we get an unexpected SENDME cell. Clients
  16842. could use this trick to make their circuits receive cells faster
  16843. than our flow control would have allowed, or to gum up the network,
  16844. or possibly to do targeted memory denial-of-service attacks on
  16845. entry nodes. Fixes bug 6252. Bugfix on the 54th commit on Tor --
  16846. from July 2002, before the release of Tor 0.0.0. We had committed
  16847. this patch previously, but we had to revert it because of bug 6271.
  16848. Now that 6271 is fixed, this patch appears to work.
  16849. - Reject any attempt to extend to an internal address. Without
  16850. this fix, a router could be used to probe addresses on an internal
  16851. network to see whether they were accepting connections. Fixes bug
  16852. 6710; bugfix on 0.0.8pre1.
  16853. - Do not crash when comparing an address with port value 0 to an
  16854. address policy. This bug could have been used to cause a remote
  16855. assertion failure by or against directory authorities, or to
  16856. allow some applications to crash clients. Fixes bug 6690; bugfix
  16857. on 0.2.1.10-alpha.
  16858. o Major bugfixes:
  16859. - Remove the upper bound on microdescriptor length. We were hitting
  16860. the limit for routers with complex exit policies or family
  16861. declarations, causing clients to not use them. Fixes the first
  16862. piece of bug 6404; fix on 0.2.2.6-alpha.
  16863. - Detect "ORPort 0" as meaning, uniformly, that we're not running
  16864. as a relay. Previously, some of our code would treat the presence
  16865. of any ORPort line as meaning that we should act like a relay,
  16866. even though our new listener code would correctly not open any
  16867. ORPorts for ORPort 0. Similar bugs in other Port options are also
  16868. fixed. Fixes the first half of bug 6507; bugfix on 0.2.3.3-alpha.
  16869. o Minor bugfixes:
  16870. - Avoid a pair of double-free and use-after-mark bugs that can
  16871. occur with certain timings in canceled and re-received DNS
  16872. requests. Fixes bug 6472; bugfix on 0.0.7rc1.
  16873. - Fix build and 64-bit compile warnings from --enable-openbsd-malloc.
  16874. Fixes bug 6379. Bugfix on 0.2.0.20-rc.
  16875. - Allow one-hop directory fetching circuits the full "circuit build
  16876. timeout" period, rather than just half of it, before failing them
  16877. and marking the relay down. This fix should help reduce cases where
  16878. clients declare relays (or worse, bridges) unreachable because
  16879. the TLS handshake takes a few seconds to complete. Fixes bug 6743;
  16880. bugfix on 0.2.2.2-alpha, where we changed the timeout from a static
  16881. 30 seconds.
  16882. - Authorities no longer include any router in their microdescriptor
  16883. consensuses for which they couldn't generate or agree on a
  16884. microdescriptor. Fixes the second piece of bug 6404; fix on
  16885. 0.2.2.6-alpha.
  16886. - Detect and reject attempts to specify both "FooPort" and
  16887. "FooPort 0" in the same configuration domain. (It's still okay
  16888. to have a FooPort in your configuration file, and use "FooPort 0"
  16889. on the command line to disable it.) Fixes the second half of bug
  16890. 6507; bugfix on 0.2.3.3-alpha.
  16891. - Make wildcarded addresses (that is, ones beginning with "*.") work
  16892. when provided via the controller's MapAddress command. Previously,
  16893. they were accepted, but we never actually noticed that they were
  16894. wildcards. Fixes bug 6244; bugfix on 0.2.3.9-alpha.
  16895. - Avoid crashing on a malformed state file where EntryGuardPathBias
  16896. precedes EntryGuard. Fix for bug 6774; bugfix on 0.2.3.17-beta.
  16897. - Add a (probably redundant) memory clear between iterations of
  16898. the router status voting loop, to prevent future coding errors
  16899. where data might leak between iterations of the loop. Resolves
  16900. ticket 6514.
  16901. o Minor bugfixes (log messages):
  16902. - Downgrade "set buildtimeout to low value" messages to "info"
  16903. severity; they were never an actual problem, there was never
  16904. anything reasonable to do about them, and they tended to spam logs
  16905. from time to time. Fixes bug 6251; bugfix on 0.2.2.2-alpha.
  16906. - Downgrade path-bias warning messages to "info". We'll try to get
  16907. them working better in 0.2.4. Add internal circuit construction
  16908. state to protect against the noisy warn message "Unexpectedly high
  16909. circuit_successes". Also add some additional rate-limited notice
  16910. messages to help determine the root cause of the warn. Fixes bug
  16911. 6475. Bugfix against 0.2.3.17-beta.
  16912. - Move log message when unable to find a microdesc in a routerstatus
  16913. entry to parse time. Previously we'd spam this warning every time
  16914. we tried to figure out which microdescriptors to download. Fixes
  16915. the third piece of bug 6404; fix on 0.2.3.18-rc.
  16916. o Minor features:
  16917. - Consider new, removed or changed IPv6 OR ports a non-cosmetic
  16918. change when the authority is deciding whether to accept a newly
  16919. uploaded descriptor. Implements ticket 6423.
  16920. - Add missing documentation for consensus and microdesc files.
  16921. Resolves ticket 6732.
  16922. Changes in version 0.2.2.38 - 2012-08-12
  16923. Tor 0.2.2.38 fixes a remotely triggerable crash bug, and fixes a timing
  16924. attack that could in theory leak path information.
  16925. o Security fixes:
  16926. - Avoid an uninitialized memory read when reading a vote or consensus
  16927. document that has an unrecognized flavor name. This read could
  16928. lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
  16929. - Try to leak less information about what relays a client is
  16930. choosing to a side-channel attacker. Previously, a Tor client would
  16931. stop iterating through the list of available relays as soon as it
  16932. had chosen one, thus finishing a little earlier when it picked
  16933. a router earlier in the list. If an attacker can recover this
  16934. timing information (nontrivial but not proven to be impossible),
  16935. they could learn some coarse-grained information about which relays
  16936. a client was picking (middle nodes in particular are likelier to
  16937. be affected than exits). The timing attack might be mitigated by
  16938. other factors (see bug 6537 for some discussion), but it's best
  16939. not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
  16940. Changes in version 0.2.3.20-rc - 2012-08-05
  16941. Tor 0.2.3.20-rc is the third release candidate for the Tor 0.2.3.x
  16942. series. It fixes a pair of code security bugs and a potential anonymity
  16943. issue, updates our RPM spec files, and cleans up other smaller issues.
  16944. o Security fixes:
  16945. - Avoid read-from-freed-memory and double-free bugs that could occur
  16946. when a DNS request fails while launching it. Fixes bug 6480;
  16947. bugfix on 0.2.0.1-alpha.
  16948. - Avoid an uninitialized memory read when reading a vote or consensus
  16949. document that has an unrecognized flavor name. This read could
  16950. lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
  16951. - Try to leak less information about what relays a client is
  16952. choosing to a side-channel attacker. Previously, a Tor client would
  16953. stop iterating through the list of available relays as soon as it
  16954. had chosen one, thus finishing a little earlier when it picked
  16955. a router earlier in the list. If an attacker can recover this
  16956. timing information (nontrivial but not proven to be impossible),
  16957. they could learn some coarse-grained information about which relays
  16958. a client was picking (middle nodes in particular are likelier to
  16959. be affected than exits). The timing attack might be mitigated by
  16960. other factors (see bug 6537 for some discussion), but it's best
  16961. not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
  16962. o Minor features:
  16963. - Try to make the warning when giving an obsolete SOCKSListenAddress
  16964. a little more useful.
  16965. - Terminate active server managed proxies if Tor stops being a
  16966. relay. Addresses parts of bug 6274; bugfix on 0.2.3.6-alpha.
  16967. - Provide a better error message about possible OSX Asciidoc failure
  16968. reasons. Fixes bug 6436.
  16969. - Warn when Tor is configured to use accounting in a way that can
  16970. link a hidden service to some other hidden service or public
  16971. address. Resolves ticket 6490.
  16972. o Minor bugfixes:
  16973. - Check return value of fputs() when writing authority certificate
  16974. file. Fixes Coverity issue 709056; bugfix on 0.2.0.1-alpha.
  16975. - Ignore ServerTransportPlugin lines when Tor is not configured as
  16976. a relay. Fixes bug 6274; bugfix on 0.2.3.6-alpha.
  16977. - When disabling guards for having too high a proportion of failed
  16978. circuits, make sure to look at each guard. Fixes bug 6397; bugfix
  16979. on 0.2.3.17-beta.
  16980. o Packaging (RPM):
  16981. - Update our default RPM spec files to work with mock and rpmbuild
  16982. on RHEL/Fedora. They have an updated set of dependencies and
  16983. conflicts, a fix for an ancient typo when creating the "_tor"
  16984. user, and better instructions. Thanks to Ondrej Mikle for the
  16985. patch series. Fixes bug 6043.
  16986. o Testing:
  16987. - Make it possible to set the TestingTorNetwork configuration
  16988. option using AlternateDirAuthority and AlternateBridgeAuthority
  16989. as an alternative to setting DirServer. Addresses ticket 6377.
  16990. o Documentation:
  16991. - Clarify the documentation for the Alternate*Authority options.
  16992. Fixes bug 6387.
  16993. - Fix some typos in the manpages. Patch from A. Costa. Fixes bug 6500.
  16994. o Code simplification and refactoring:
  16995. - Do not use SMARTLIST_FOREACH for any loop whose body exceeds
  16996. 10 lines. Also, don't nest them. Doing so in the past has
  16997. led to hard-to-debug code. The new style is to use the
  16998. SMARTLIST_FOREACH_{BEGIN,END} pair. Addresses issue 6400.
  16999. Changes in version 0.2.3.19-rc - 2012-07-06
  17000. Tor 0.2.3.19-rc is the second release candidate for the Tor 0.2.3.x
  17001. series. It fixes the compile on Windows, reverts to a GeoIP database
  17002. that isn't as broken, and fixes a flow control bug that has been around
  17003. since the beginning of Tor.
  17004. o Major bugfixes:
  17005. - Fix a bug handling SENDME cells on nonexistent streams that could
  17006. result in bizarre window values. Report and patch contributed
  17007. pseudonymously. Fixes part of bug 6271. This bug was introduced
  17008. before the first Tor release, in svn commit r152.
  17009. - Revert to the May 1 2012 Maxmind GeoLite Country database. In the
  17010. June 2012 database, Maxmind marked many Tor relays as country "A1",
  17011. which will cause risky behavior for clients that set EntryNodes
  17012. or ExitNodes. Addresses bug 6334; bugfix on 0.2.3.17-beta.
  17013. - Instead of ENOBUFS on Windows, say WSAENOBUFS. Fixes compilation
  17014. on Windows. Fixes bug 6296; bugfix on 0.2.3.18-rc.
  17015. o Minor bugfixes:
  17016. - Fix wrong TCP port range in parse_port_range(). Fixes bug 6218;
  17017. bugfix on 0.2.1.10-alpha.
  17018. Changes in version 0.2.3.18-rc - 2012-06-28
  17019. Tor 0.2.3.18-rc is the first release candidate for the Tor 0.2.3.x
  17020. series. It fixes a few smaller bugs, but generally appears stable.
  17021. Please test it and let us know whether it is!
  17022. o Major bugfixes:
  17023. - Allow wildcarded mapaddress targets to be specified on the
  17024. controlport. Partially fixes bug 6244; bugfix on 0.2.3.9-alpha.
  17025. - Make our linker option detection code more robust against linkers
  17026. such as on FreeBSD 8, where a bad combination of options completes
  17027. successfully but makes an unrunnable binary. Fixes bug 6173;
  17028. bugfix on 0.2.3.17-beta.
  17029. o Minor bugfixes (on 0.2.2.x and earlier):
  17030. - Avoid a false positive in the util/threads unit test by increasing
  17031. the maximum timeout time. Fixes bug 6227; bugfix on 0.2.0.4-alpha.
  17032. - Replace "Sending publish request" log messages with "Launching
  17033. upload", so that they no longer confusingly imply that we're
  17034. sending something to a directory we might not even be connected
  17035. to yet. Fixes bug 3311; bugfix on 0.2.0.10-alpha.
  17036. - Make sure to set *socket_error in all error cases in
  17037. connection_connect(), so it can't produce a warning about
  17038. errno being zero from errno_to_orconn_end_reason(). Bugfix on
  17039. 0.2.1.1-alpha; resolves ticket 6028.
  17040. - Downgrade "Got a certificate, but we already have it" log messages
  17041. from warning to info, except when we're a dirauth. Fixes bug 5238;
  17042. bugfix on 0.2.1.7-alpha.
  17043. - When checking for requested signatures on the latest consensus
  17044. before serving it to a client, make sure to check the right
  17045. consensus flavor. Bugfix on 0.2.2.6-alpha.
  17046. - Downgrade "eventdns rejected address" message to LOG_PROTOCOL_WARN.
  17047. Fixes bug 5932; bugfix on 0.2.2.7-alpha.
  17048. o Minor bugfixes (on 0.2.3.x):
  17049. - Make format_helper_exit_status() avoid unnecessary space padding
  17050. and stop confusing log_from_pipe(). Fixes ticket 5557; bugfix
  17051. on 0.2.3.1-alpha.
  17052. - Downgrade a message about cleaning the microdescriptor cache to
  17053. "info" from "notice". Fixes bug 6238; bugfix on 0.2.3.1-alpha.
  17054. - Log a BUG message at severity INFO if we have a networkstatus with
  17055. a missing entry for some microdescriptor. Continues on a patch
  17056. to 0.2.3.2-alpha.
  17057. - Improve the log message when a managed proxy fails to launch. Fixes
  17058. bug 5099; bugfix on 0.2.3.6-alpha.
  17059. - Don't do DNS lookups when parsing corrupted managed proxy protocol
  17060. messages. Fixes bug 6226; bugfix on 0.2.3.6-alpha.
  17061. - When formatting wildcarded address mappings for the controller,
  17062. be sure to include "*." as appropriate. Partially fixes bug 6244;
  17063. bugfix on 0.2.3.9-alpha.
  17064. - Avoid a warning caused by using strcspn() from glibc with clang 3.0.
  17065. Bugfix on 0.2.3.13-alpha.
  17066. - Stop logging messages about running with circuit timeout learning
  17067. enabled at severity LD_BUG. Fixes bug 6169; bugfix on 0.2.3.17-beta.
  17068. - Disable a spurious warning about reading on a marked and flushing
  17069. connection. We shouldn't be doing that, but apparently we
  17070. sometimes do. Fixes bug 6203; bugfix on 0.2.3.17-beta.
  17071. - Fix a bug that stopped AllowDotExit from working on addresses
  17072. that had an entry in the DNS cache. Fixes bug 6211; bugfix on
  17073. 0.2.3.17-beta.
  17074. o Code simplification, refactoring, unit tests:
  17075. - Move tor_gettimeofday_cached() into compat_libevent.c, and use
  17076. Libevent's notion of cached time when possible.
  17077. - Remove duplicate code for invoking getrlimit() from control.c.
  17078. - Add a unit test for the environment_variable_names_equal function.
  17079. o Documentation:
  17080. - Document the --defaults-torrc option, and the new (in 0.2.3)
  17081. semantics for overriding, extending, and clearing lists of
  17082. options. Closes bug 4748.
  17083. Changes in version 0.2.3.17-beta - 2012-06-15
  17084. Tor 0.2.3.17-beta enables compiler and linker hardening by default,
  17085. gets our TLS handshake back on track for being able to blend in with
  17086. Firefox, fixes a big bug in 0.2.3.16-alpha that broke Tor's interaction
  17087. with Vidalia, and otherwise continues to get us closer to a release
  17088. candidate.
  17089. o Major features:
  17090. - Enable gcc and ld hardening by default. Resolves ticket 5210.
  17091. - Update TLS cipher list to match Firefox 8 and later. Resolves
  17092. ticket 4744.
  17093. - Implement the client side of proposal 198: remove support for
  17094. clients falsely claiming to support standard ciphersuites that
  17095. they can actually provide. As of modern OpenSSL versions, it's not
  17096. necessary to fake any standard ciphersuite, and doing so prevents
  17097. us from using better ciphersuites in the future, since servers
  17098. can't know whether an advertised ciphersuite is really supported or
  17099. not. Some hosts -- notably, ones with very old versions of OpenSSL
  17100. or where OpenSSL has been built with ECC disabled -- will stand
  17101. out because of this change; TBB users should not be affected.
  17102. o Major bugfixes:
  17103. - Change the default value for DynamicDHGroups (introduced in
  17104. 0.2.3.9-alpha) to 0. This feature can make Tor relays less
  17105. identifiable by their use of the mod_ssl DH group, but at
  17106. the cost of some usability (#4721) and bridge tracing (#6087)
  17107. regressions. Resolves ticket 5598.
  17108. - Send a CRLF at the end of each STATUS_* control protocol event. This
  17109. bug tickled a bug in Vidalia which would make it freeze. Fixes
  17110. bug 6094; bugfix on 0.2.3.16-alpha.
  17111. o Minor bugfixes:
  17112. - Disable writing on marked-for-close connections when they are
  17113. blocked on bandwidth, to prevent busy-looping in Libevent. Fixes
  17114. bug 5263; bugfix on 0.0.2pre13, where we first added a special
  17115. case for flushing marked connections.
  17116. - Detect SSL handshake even when the initial attempt to write the
  17117. server hello fails. Fixes bug 4592; bugfix on 0.2.0.13-alpha.
  17118. - Change the AllowDotExit rules so they should actually work.
  17119. We now enforce AllowDotExit only immediately after receiving an
  17120. address via SOCKS or DNSPort: other sources are free to provide
  17121. .exit addresses after the resolution occurs. Fixes bug 3940;
  17122. bugfix on 0.2.2.1-alpha.
  17123. - Fix a (harmless) integer overflow in cell statistics reported by
  17124. some fast relays. Fixes bug 5849; bugfix on 0.2.2.1-alpha.
  17125. - Make sure circuitbuild.c checks LearnCircuitBuildTimeout in all the
  17126. right places and never depends on the consensus parameters or
  17127. computes adaptive timeouts when it is disabled. Fixes bug 5049;
  17128. bugfix on 0.2.2.14-alpha.
  17129. - When building Tor on Windows with -DUNICODE (not default), ensure
  17130. that error messages, filenames, and DNS server names are always
  17131. NUL-terminated when we convert them to a single-byte encoding.
  17132. Fixes bug 5909; bugfix on 0.2.2.16-alpha.
  17133. - Make Tor build correctly again with -DUNICODE -D_UNICODE defined.
  17134. Fixes bug 6097; bugfix on 0.2.2.16-alpha.
  17135. - Fix an edge case where TestingTorNetwork is set but the authorities
  17136. and relays all have an uptime of zero, where the private Tor network
  17137. could briefly lack support for hidden services. Fixes bug 3886;
  17138. bugfix on 0.2.2.18-alpha.
  17139. - Correct the manpage's descriptions for the default values of
  17140. DirReqStatistics and ExtraInfoStatistics. Fixes bug 2865; bugfix
  17141. on 0.2.3.1-alpha.
  17142. - Fix the documentation for the --hush and --quiet command line
  17143. options, which changed their behavior back in 0.2.3.3-alpha.
  17144. - Fix compilation warning with clang 3.1. Fixes bug 6141; bugfix on
  17145. 0.2.3.11-alpha.
  17146. o Minor features:
  17147. - Rate-limit the "Weighted bandwidth is 0.000000" message, and add
  17148. more information to it, so that we can track it down in case it
  17149. returns again. Mitigates bug 5235.
  17150. - Check CircuitBuildTimeout and LearnCircuitBuildTimeout in
  17151. options_validate(); warn if LearnCircuitBuildTimeout is disabled and
  17152. CircuitBuildTimeout is set unreasonably low. Resolves ticket 5452.
  17153. - Warn the user when HTTPProxy, but no other proxy type, is
  17154. configured. This can cause surprising behavior: it doesn't send
  17155. all of Tor's traffic over the HTTPProxy -- it sends unencrypted
  17156. directory traffic only. Resolves ticket 4663.
  17157. - Issue a notice if a guard completes less than 40% of your circuits.
  17158. Threshold is configurable by torrc option PathBiasNoticeRate and
  17159. consensus parameter pb_noticepct. There is additional, off-by-
  17160. default code to disable guards which fail too many circuits.
  17161. Addresses ticket 5458.
  17162. - Update to the June 6 2012 Maxmind GeoLite Country database.
  17163. o Code simplifications and refactoring:
  17164. - Remove validate_pluggable_transports_config(): its warning
  17165. message is now handled by connection_or_connect().
  17166. Changes in version 0.2.2.37 - 2012-06-06
  17167. Tor 0.2.2.37 introduces a workaround for a critical renegotiation
  17168. bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
  17169. currently).
  17170. o Major bugfixes:
  17171. - Work around a bug in OpenSSL that broke renegotiation with TLS
  17172. 1.1 and TLS 1.2. Without this workaround, all attempts to speak
  17173. the v2 Tor connection protocol when both sides were using OpenSSL
  17174. 1.0.1 would fail. Resolves ticket 6033.
  17175. - When waiting for a client to renegotiate, don't allow it to add
  17176. any bytes to the input buffer. This fixes a potential DoS issue.
  17177. Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
  17178. - Fix an edge case where if we fetch or publish a hidden service
  17179. descriptor, we might build a 4-hop circuit and then use that circuit
  17180. for exiting afterwards -- even if the new last hop doesn't obey our
  17181. ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
  17182. o Minor bugfixes:
  17183. - Fix a build warning with Clang 3.1 related to our use of vasprintf.
  17184. Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
  17185. o Minor features:
  17186. - Tell GCC and Clang to check for any errors in format strings passed
  17187. to the tor_v*(print|scan)f functions.
  17188. Changes in version 0.2.3.16-alpha - 2012-06-05
  17189. Tor 0.2.3.16-alpha introduces a workaround for a critical renegotiation
  17190. bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
  17191. currently). It also fixes a variety of smaller bugs and other cleanups
  17192. that get us closer to a release candidate.
  17193. o Major bugfixes (general):
  17194. - Work around a bug in OpenSSL that broke renegotiation with TLS
  17195. 1.1 and TLS 1.2. Without this workaround, all attempts to speak
  17196. the v2 Tor connection protocol when both sides were using OpenSSL
  17197. 1.0.1 would fail. Resolves ticket 6033.
  17198. - When waiting for a client to renegotiate, don't allow it to add
  17199. any bytes to the input buffer. This fixes a potential DoS issue.
  17200. Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
  17201. - Pass correct OR address to managed proxies (like obfsproxy),
  17202. even when ORListenAddress is used. Fixes bug 4865; bugfix on
  17203. 0.2.3.9-alpha.
  17204. - The advertised platform of a router now includes only its operating
  17205. system's name (e.g., "Linux", "Darwin", "Windows 7"), and not its
  17206. service pack level (for Windows) or its CPU architecture (for Unix).
  17207. We also no longer include the "git-XYZ" tag in the version. Resolves
  17208. part of bug 2988.
  17209. o Major bugfixes (clients):
  17210. - If we are unable to find any exit that supports our predicted ports,
  17211. stop calling them predicted, so that we don't loop and build
  17212. hopeless circuits indefinitely. Fixes bug 3296; bugfix on 0.0.9pre6,
  17213. which introduced predicted ports.
  17214. - Fix an edge case where if we fetch or publish a hidden service
  17215. descriptor, we might build a 4-hop circuit and then use that circuit
  17216. for exiting afterwards -- even if the new last hop doesn't obey our
  17217. ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
  17218. - Check at each new consensus whether our entry guards were picked
  17219. long enough ago that we should rotate them. Previously, we only
  17220. did this check at startup, which could lead to us holding a guard
  17221. indefinitely. Fixes bug 5380; bugfix on 0.2.1.14-rc.
  17222. - When fetching a bridge descriptor from a bridge authority,
  17223. always do so anonymously, whether we have been able to open
  17224. circuits or not. Partial fix for bug 1938; bugfix on 0.2.0.7-alpha.
  17225. This behavior makes it *safer* to use UpdateBridgesFromAuthority,
  17226. but we'll need to wait for bug 6010 before it's actually usable.
  17227. o Major bugfixes (directory authorities):
  17228. - When computing weight parameters, behave more robustly in the
  17229. presence of a bad bwweightscale value. Previously, the authorities
  17230. would crash if they agreed on a sufficiently broken weight_scale
  17231. value: now, they use a reasonable default and carry on. Partial
  17232. fix for 5786; bugfix on 0.2.2.17-alpha.
  17233. - Check more thoroughly to prevent a rogue authority from
  17234. double-voting on any consensus directory parameter. Previously,
  17235. authorities would crash in this case if the total number of
  17236. votes for any parameter exceeded the number of active voters,
  17237. but would let it pass otherwise. Partial fix for bug 5786; bugfix
  17238. on 0.2.2.2-alpha.
  17239. o Minor features:
  17240. - Rate-limit log messages when asked to connect anonymously to
  17241. a private address. When these hit, they tended to hit fast and
  17242. often. Also, don't bother trying to connect to addresses that we
  17243. are sure will resolve to 127.0.0.1: getting 127.0.0.1 in a directory
  17244. reply makes us think we have been lied to, even when the address the
  17245. client tried to connect to was "localhost." Resolves ticket 2822.
  17246. - Allow packagers to insert an extra string in server descriptor
  17247. platform lines by setting the preprocessor variable TOR_BUILD_TAG.
  17248. Resolves the rest of ticket 2988.
  17249. - Raise the threshold of server descriptors needed (75%) and exit
  17250. server descriptors needed (50%) before we will declare ourselves
  17251. bootstrapped. This will make clients start building circuits a
  17252. little later, but makes the initially constructed circuits less
  17253. skewed and less in conflict with further directory fetches. Fixes
  17254. ticket 3196.
  17255. - Close any connection that sends unrecognized junk before the
  17256. handshake. Solves an issue noted in bug 4369.
  17257. - Improve log messages about managed transports. Resolves ticket 5070.
  17258. - Tag a bridge's descriptor as "never to be sent unencrypted".
  17259. This shouldn't matter, since bridges don't open non-anonymous
  17260. connections to the bridge authority and don't allow unencrypted
  17261. directory connections from clients, but we might as well make
  17262. sure. Closes bug 5139.
  17263. - Expose our view of whether we have gone dormant to the controller,
  17264. via a new "GETINFO dormant" value. Torbutton and other controllers
  17265. can use this to avoid doing periodic requests through Tor while
  17266. it's dormant (bug 4718). Fixes bug 5954.
  17267. - Tell GCC and Clang to check for any errors in format strings passed
  17268. to the tor_v*(print|scan)f functions.
  17269. - Update to the May 1 2012 Maxmind GeoLite Country database.
  17270. o Minor bugfixes (already included in 0.2.2.36):
  17271. - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
  17272. Fixes bug 5346; bugfix on 0.0.8pre3.
  17273. - Correct parsing of certain date types in parse_http_time().
  17274. Without this patch, If-Modified-Since would behave
  17275. incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
  17276. Esteban Manchado Velázques.
  17277. - Make our number-parsing functions always treat too-large values
  17278. as an error, even when those values exceed the width of the
  17279. underlying type. Previously, if the caller provided these
  17280. functions with minima or maxima set to the extreme values of the
  17281. underlying integer type, these functions would return those
  17282. values on overflow rather than treating overflow as an error.
  17283. Fixes part of bug 5786; bugfix on 0.0.9.
  17284. - If we hit the error case where routerlist_insert() replaces an
  17285. existing (old) server descriptor, make sure to remove that
  17286. server descriptor from the old_routers list. Fix related to bug
  17287. 1776. Bugfix on 0.2.2.18-alpha.
  17288. - Clarify the behavior of MaxCircuitDirtiness with hidden service
  17289. circuits. Fixes issue 5259.
  17290. o Minor bugfixes (coding cleanup, on 0.2.2.x and earlier):
  17291. - Prevent a null-pointer dereference when receiving a data cell
  17292. for a nonexistent stream when the circuit in question has an
  17293. empty deliver window. We don't believe this is triggerable,
  17294. since we don't currently allow deliver windows to become empty,
  17295. but the logic is tricky enough that it's better to make the code
  17296. robust. Fixes bug 5541; bugfix on 0.0.2pre14.
  17297. - Fix a memory leak when trying to launch a DNS request when the
  17298. network is disabled or the nameservers are unconfigurable. Fixes
  17299. bug 5916; bugfix on Tor 0.1.2.1-alpha (for the unconfigurable
  17300. nameserver case) and on 0.2.3.9-alpha (for the DisableNetwork case).
  17301. - Don't hold a Windows file handle open for every file mapping;
  17302. the file mapping handle is sufficient. Fixes bug 5951; bugfix on
  17303. 0.1.2.1-alpha.
  17304. - Avoid O(n^2) performance characteristics when parsing a large
  17305. extrainfo cache. Fixes bug 5828; bugfix on 0.2.0.1-alpha.
  17306. - Format more doubles with %f, not %lf. Patch from grarpamp to make
  17307. Tor build correctly on older BSDs again. Fixes bug 3894; bugfix on
  17308. Tor 0.2.0.8-alpha.
  17309. - Make our replacement implementation of strtok_r() compatible with
  17310. the standard behavior of strtok_r(). Patch by nils. Fixes bug 5091;
  17311. bugfix on 0.2.2.1-alpha.
  17312. - Fix a NULL-pointer dereference on a badly formed
  17313. SETCIRCUITPURPOSE command. Found by mikeyc. Fixes bug 5796;
  17314. bugfix on 0.2.2.9-alpha.
  17315. - Fix a build warning with Clang 3.1 related to our use of vasprintf.
  17316. Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
  17317. - Defensively refactor rend_mid_rendezvous() so that protocol
  17318. violations and length checks happen in the beginning. Fixes
  17319. bug 5645.
  17320. - Set _WIN32_WINNT to 0x0501 consistently throughout the code, so
  17321. that IPv6 stuff will compile on MSVC, and compilation issues
  17322. will be easier to track down. Fixes bug 5861.
  17323. o Minor bugfixes (correctness, on 0.2.2.x and earlier):
  17324. - Exit nodes now correctly report EADDRINUSE and EADDRNOTAVAIL as
  17325. resource exhaustion, so that clients can adjust their load to
  17326. try other exits. Fixes bug 4710; bugfix on 0.1.0.1-rc, which
  17327. started using END_STREAM_REASON_RESOURCELIMIT.
  17328. - Don't check for whether the address we're using for outbound
  17329. connections has changed until after the outbound connection has
  17330. completed. On Windows, getsockname() doesn't succeed until the
  17331. connection is finished. Fixes bug 5374; bugfix on 0.1.1.14-alpha.
  17332. - If the configuration tries to set MyFamily on a bridge, refuse to
  17333. do so, and warn about the security implications. Fixes bug 4657;
  17334. bugfix on 0.2.0.3-alpha.
  17335. - If the client fails to set a reasonable set of ciphersuites
  17336. during its v2 handshake renegotiation, allow the renegotiation to
  17337. continue nevertheless (i.e. send all the required certificates).
  17338. Fixes bug 4591; bugfix on 0.2.0.20-rc.
  17339. - When we receive a SIGHUP and the controller __ReloadTorrcOnSIGHUP
  17340. option is set to 0 (which Vidalia version 0.2.16 now does when
  17341. a SAVECONF attempt fails), perform other actions that SIGHUP
  17342. usually causes (like reopening the logs). Fixes bug 5095; bugfix
  17343. on 0.2.1.9-alpha.
  17344. - If we fail to write a microdescriptor to the disk cache, do not
  17345. continue replacing the old microdescriptor file. Fixes bug 2954;
  17346. bugfix on 0.2.2.6-alpha.
  17347. - Exit nodes don't need to fetch certificates for authorities that
  17348. they don't recognize; only directory authorities, bridges,
  17349. and caches need to do that. Fixes part of bug 2297; bugfix on
  17350. 0.2.2.11-alpha.
  17351. - Correctly handle checking the permissions on the parent
  17352. directory of a control socket in the root directory. Bug found
  17353. by Esteban Manchado Velázquez. Fixes bug 5089; bugfix on Tor
  17354. 0.2.2.26-beta.
  17355. - When told to add a bridge with the same digest as a preexisting
  17356. bridge but a different addr:port, change the addr:port as
  17357. requested. Previously we would not notice the change. Fixes half
  17358. of bug 5603; fix on 0.2.2.26-beta.
  17359. - End AUTHCHALLENGE error messages (in the control protocol) with
  17360. a CRLF. Fixes bug 5760; bugfix on 0.2.2.36 and 0.2.3.13-alpha.
  17361. o Minor bugfixes (on 0.2.3.x):
  17362. - Turn an assertion (that the number of handshakes received as a
  17363. server is not < 1) into a warning. Fixes bug 4873; bugfix on
  17364. 0.2.3.1-alpha.
  17365. - Format IPv4 addresses correctly in ADDRMAP events. (Previously,
  17366. we had reversed them when the answer was cached.) Fixes bug
  17367. 5723; bugfix on 0.2.3.1-alpha.
  17368. - Work correctly on Linux systems with accept4 support advertised in
  17369. their headers, but without accept4 support in the kernel. Fix
  17370. by murb. Fixes bug 5762; bugfix on 0.2.3.1-alpha.
  17371. - When told to add a bridge with the same addr:port as a preexisting
  17372. bridge but a different transport, change the transport as
  17373. requested. Previously we would not notice the change. Fixes half
  17374. of bug 5603; fix on 0.2.3.2-alpha.
  17375. - Avoid a "double-reply" warning when replying to a SOCKS request
  17376. with a parse error. Patch from Fabian Keil. Fixes bug 4108;
  17377. bugfix on 0.2.3.4-alpha.
  17378. - Fix a bug where a bridge authority crashes if it has seen no
  17379. directory requests when it's time to write statistics to disk.
  17380. Fixes bug 5891; bugfix on 0.2.3.6-alpha. Also fixes bug 5508 in
  17381. a better way.
  17382. - Don't try to open non-control listeners when DisableNetwork is set.
  17383. Previously, we'd open all listeners, then immediately close them.
  17384. Fixes bug 5604; bugfix on 0.2.3.9-alpha.
  17385. - Don't abort the managed proxy protocol if the managed proxy
  17386. sends us an unrecognized line; ignore it instead. Fixes bug
  17387. 5910; bugfix on 0.2.3.9-alpha.
  17388. - Fix a compile warning in crypto.c when compiling with clang 3.1.
  17389. Fixes bug 5969, bugfix on 0.2.3.9-alpha.
  17390. - Fix a compilation issue on GNU Hurd, which doesn't have PATH_MAX.
  17391. Fixes bug 5355; bugfix on 0.2.3.11-alpha.
  17392. - Remove bogus definition of "_WIN32" from src/win32/orconfig.h, to
  17393. unbreak the MSVC build. Fixes bug 5858; bugfix on 0.2.3.12-alpha.
  17394. - Resolve numerous small warnings and build issues with MSVC. Resolves
  17395. bug 5859.
  17396. o Documentation fixes:
  17397. - Improve the manual's documentation for the NT Service command-line
  17398. options. Addresses ticket 3964.
  17399. - Clarify SessionGroup documentation slightly; resolves ticket 5437.
  17400. - Document the changes to the ORPort and DirPort options, and the
  17401. fact that {OR/Dir}ListenAddress is now unnecessary (and
  17402. therefore deprecated). Resolves ticket 5597.
  17403. o Removed files:
  17404. - Remove the torrc.bridge file: we don't use it for anything, and
  17405. it had become badly desynchronized from torrc.sample. Resolves
  17406. bug 5622.
  17407. Changes in version 0.2.2.36 - 2012-05-24
  17408. Tor 0.2.2.36 updates the addresses for two of the eight directory
  17409. authorities, fixes some potential anonymity and security issues,
  17410. and fixes several crash bugs.
  17411. Tor 0.2.1.x has reached its end-of-life. Those Tor versions have many
  17412. known flaws, and nobody should be using them. You should upgrade. If
  17413. you're using a Linux or BSD and its packages are obsolete, stop using
  17414. those packages and upgrade anyway.
  17415. o Directory authority changes:
  17416. - Change IP address for maatuska (v3 directory authority).
  17417. - Change IP address for ides (v3 directory authority), and rename
  17418. it to turtles.
  17419. o Security fixes:
  17420. - When building or running with any version of OpenSSL earlier
  17421. than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
  17422. versions have a bug (CVE-2011-4576) in which their block cipher
  17423. padding includes uninitialized data, potentially leaking sensitive
  17424. information to any peer with whom they make a SSLv3 connection. Tor
  17425. does not use SSL v3 by default, but a hostile client or server
  17426. could force an SSLv3 connection in order to gain information that
  17427. they shouldn't have been able to get. The best solution here is to
  17428. upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
  17429. or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
  17430. to make sure that the bug can't happen.
  17431. - Never use a bridge or a controller-supplied node as an exit, even
  17432. if its exit policy allows it. Found by wanoskarnet. Fixes bug
  17433. 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
  17434. and 0.2.0.3-alpha (for bridge-purpose descriptors).
  17435. - Only build circuits if we have a sufficient threshold of the total
  17436. descriptors that are marked in the consensus with the "Exit"
  17437. flag. This mitigates an attack proposed by wanoskarnet, in which
  17438. all of a client's bridges collude to restrict the exit nodes that
  17439. the client knows about. Fixes bug 5343.
  17440. - Provide controllers with a safer way to implement the cookie
  17441. authentication mechanism. With the old method, if another locally
  17442. running program could convince a controller that it was the Tor
  17443. process, then that program could trick the controller into telling
  17444. it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
  17445. authentication method uses a challenge-response approach to prevent
  17446. this attack. Fixes bug 5185; implements proposal 193.
  17447. o Major bugfixes:
  17448. - Avoid logging uninitialized data when unable to decode a hidden
  17449. service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
  17450. - Avoid a client-side assertion failure when receiving an INTRODUCE2
  17451. cell on a general purpose circuit. Fixes bug 5644; bugfix on
  17452. 0.2.1.6-alpha.
  17453. - Fix builds when the path to sed, openssl, or sha1sum contains
  17454. spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
  17455. on 0.2.2.1-alpha.
  17456. - Correct our replacements for the timeradd() and timersub() functions
  17457. on platforms that lack them (for example, Windows). The timersub()
  17458. function is used when expiring circuits, while timeradd() is
  17459. currently unused. Bug report and patch by Vektor. Fixes bug 4778;
  17460. bugfix on 0.2.2.24-alpha.
  17461. - Fix the SOCKET_OK test that we use to tell when socket
  17462. creation fails so that it works on Win64. Fixes part of bug 4533;
  17463. bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
  17464. o Minor bugfixes:
  17465. - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
  17466. Fixes bug 5346; bugfix on 0.0.8pre3.
  17467. - Make our number-parsing functions always treat too-large values
  17468. as an error, even when those values exceed the width of the
  17469. underlying type. Previously, if the caller provided these
  17470. functions with minima or maxima set to the extreme values of the
  17471. underlying integer type, these functions would return those
  17472. values on overflow rather than treating overflow as an error.
  17473. Fixes part of bug 5786; bugfix on 0.0.9.
  17474. - Older Linux kernels erroneously respond to strange nmap behavior
  17475. by having accept() return successfully with a zero-length
  17476. socket. When this happens, just close the connection. Previously,
  17477. we would try harder to learn the remote address: but there was
  17478. no such remote address to learn, and our method for trying to
  17479. learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
  17480. on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
  17481. - Correct parsing of certain date types in parse_http_time().
  17482. Without this patch, If-Modified-Since would behave
  17483. incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
  17484. Esteban Manchado Velázques.
  17485. - Change the BridgePassword feature (part of the "bridge community"
  17486. design, which is not yet implemented) to use a time-independent
  17487. comparison. The old behavior might have allowed an adversary
  17488. to use timing to guess the BridgePassword value. Fixes bug 5543;
  17489. bugfix on 0.2.0.14-alpha.
  17490. - Detect and reject certain misformed escape sequences in
  17491. configuration values. Previously, these values would cause us
  17492. to crash if received in a torrc file or over an authenticated
  17493. control port. Bug found by Esteban Manchado Velázquez, and
  17494. independently by Robert Connolly from Matta Consulting who further
  17495. noted that it allows a post-authentication heap overflow. Patch
  17496. by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
  17497. bugfix on 0.2.0.16-alpha.
  17498. - Fix a compile warning when using the --enable-openbsd-malloc
  17499. configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
  17500. - During configure, detect when we're building with clang version
  17501. 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
  17502. CFLAGS. clang doesn't support them yet.
  17503. - When sending an HTTP/1.1 proxy request, include a Host header.
  17504. Fixes bug 5593; bugfix on 0.2.2.1-alpha.
  17505. - Fix a NULL-pointer dereference on a badly formed SETCIRCUITPURPOSE
  17506. command. Found by mikeyc. Fixes bug 5796; bugfix on 0.2.2.9-alpha.
  17507. - If we hit the error case where routerlist_insert() replaces an
  17508. existing (old) server descriptor, make sure to remove that
  17509. server descriptor from the old_routers list. Fix related to bug
  17510. 1776. Bugfix on 0.2.2.18-alpha.
  17511. o Minor bugfixes (documentation and log messages):
  17512. - Fix a typo in a log message in rend_service_rendezvous_has_opened().
  17513. Fixes bug 4856; bugfix on Tor 0.0.6.
  17514. - Update "ClientOnly" man page entry to explain that there isn't
  17515. really any point to messing with it. Resolves ticket 5005.
  17516. - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
  17517. directory authority option (introduced in Tor 0.2.2.34).
  17518. - Downgrade the "We're missing a certificate" message from notice
  17519. to info: people kept mistaking it for a real problem, whereas it
  17520. is seldom the problem even when we are failing to bootstrap. Fixes
  17521. bug 5067; bugfix on 0.2.0.10-alpha.
  17522. - Correctly spell "connect" in a log message on failure to create a
  17523. controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta.
  17524. - Clarify the behavior of MaxCircuitDirtiness with hidden service
  17525. circuits. Fixes issue 5259.
  17526. o Minor features:
  17527. - Directory authorities now reject versions of Tor older than
  17528. 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
  17529. inclusive. These versions accounted for only a small fraction of
  17530. the Tor network, and have numerous known security issues. Resolves
  17531. issue 4788.
  17532. - Update to the May 1 2012 Maxmind GeoLite Country database.
  17533. o Feature removal:
  17534. - When sending or relaying a RELAY_EARLY cell, we used to convert
  17535. it to a RELAY cell if the connection was using the v1 link
  17536. protocol. This was a workaround for older versions of Tor, which
  17537. didn't handle RELAY_EARLY cells properly. Now that all supported
  17538. versions can handle RELAY_EARLY cells, and now that we're enforcing
  17539. the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
  17540. remove this workaround. Addresses bug 4786.
  17541. Changes in version 0.2.3.15-alpha - 2012-04-30
  17542. Tor 0.2.3.15-alpha fixes a variety of smaller bugs, including making
  17543. the development branch build on Windows again.
  17544. o Minor bugfixes (on 0.2.2.x and earlier):
  17545. - Make sure that there are no unhandled pending TLS errors before
  17546. reading from a TLS stream. We had checks in 0.1.0.3-rc, but
  17547. lost them in 0.1.0.5-rc when we refactored read_to_buf_tls().
  17548. Bugfix on 0.1.0.5-rc; fixes bug 4528.
  17549. - Fix an assert that directory authorities could trigger on sighup
  17550. during some configuration state transitions. We now don't treat
  17551. it as a fatal error when the new descriptor we just generated in
  17552. init_keys() isn't accepted. Fixes bug 4438; bugfix on 0.2.1.9-alpha.
  17553. - After we pick a directory mirror, we would refuse to use it if
  17554. it's in our ExcludeExitNodes list, resulting in mysterious failures
  17555. to bootstrap for people who just wanted to avoid exiting from
  17556. certain locations. Fixes bug 5623; bugfix on 0.2.2.25-alpha.
  17557. - When building with --enable-static-tor on OpenBSD, do not
  17558. erroneously attempt to link -lrt. Fixes bug 5103.
  17559. o Minor bugfixes (on 0.2.3.x):
  17560. - When Tor is built with kernel headers from a recent (last few
  17561. years) Linux kernel, do not fail to run on older (pre-2.6.28
  17562. Linux kernels). Fixes bug 5112; bugfix on 0.2.3.1-alpha.
  17563. - Fix cross-compilation issues with mingw. Bugfixes on 0.2.3.6-alpha
  17564. and 0.2.3.12-alpha.
  17565. - Fix compilation with miniupnpc version 1.6; patch from
  17566. Anthony G. Basile. Fixes bug 5434; bugfix on 0.2.3.12-alpha.
  17567. - Fix compilation with MSVC, which had defined MS_WINDOWS. Bugfix
  17568. on 0.2.3.13-alpha; found and fixed by Gisle Vanem.
  17569. - Fix compilation on platforms without unistd.h, or where environ
  17570. is defined in stdlib.h. Fixes bug 5704; bugfix on 0.2.3.13-alpha.
  17571. o Minor features:
  17572. - Directory authorities are now a little more lenient at accepting
  17573. older router descriptors, or newer router descriptors that don't
  17574. make big changes. This should help ameliorate past and future
  17575. issues where routers think they have uploaded valid descriptors,
  17576. but the authorities don't think so. Fix for ticket 2479.
  17577. - Make the code that clients use to detect an address change be
  17578. IPv6-aware, so that it won't fill clients' logs with error
  17579. messages when trying to get the IPv4 address of an IPv6
  17580. connection. Implements ticket 5537.
  17581. o Removed features:
  17582. - Remove the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays option;
  17583. authorities needed to use it for a while to keep the network working
  17584. as people upgraded to 0.2.1.31, 0.2.2.34, or 0.2.3.6-alpha, but
  17585. that was six months ago. As of now, it should no longer be needed
  17586. or used.
  17587. Changes in version 0.2.3.14-alpha - 2012-04-23
  17588. Tor 0.2.3.14-alpha fixes yet more bugs to get us closer to a release
  17589. candidate. It also dramatically speeds up AES: fast relays should
  17590. consider switching to the newer OpenSSL library.
  17591. o Directory authority changes:
  17592. - Change IP address for ides (v3 directory authority), and rename
  17593. it to turtles.
  17594. o Major bugfixes:
  17595. - Avoid logging uninitialized data when unable to decode a hidden
  17596. service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
  17597. - Avoid a client-side assertion failure when receiving an INTRODUCE2
  17598. cell on a general purpose circuit. Fixes bug 5644; bugfix on
  17599. 0.2.1.6-alpha.
  17600. - If authorities are unable to get a v2 consensus document from other
  17601. directory authorities, they no longer fall back to fetching
  17602. them from regular directory caches. Fixes bug 5635; bugfix on
  17603. 0.2.2.26-beta, where routers stopped downloading v2 consensus
  17604. documents entirely.
  17605. - When we start a Tor client with a normal consensus already cached,
  17606. be willing to download a microdescriptor consensus. Fixes bug 4011;
  17607. fix on 0.2.3.1-alpha.
  17608. o Major features (performance):
  17609. - When built to use OpenSSL 1.0.1, and built for an x86 or x86_64
  17610. instruction set, take advantage of OpenSSL's AESNI, bitsliced, or
  17611. vectorized AES implementations as appropriate. These can be much,
  17612. much faster than other AES implementations.
  17613. o Minor bugfixes (0.2.2.x and earlier):
  17614. - Don't launch more than 10 service-side introduction-point circuits
  17615. for a hidden service in five minutes. Previously, we would consider
  17616. launching more introduction-point circuits if at least one second
  17617. had passed without any introduction-point circuits failing. Fixes
  17618. bug 4607; bugfix on 0.0.7pre1.
  17619. - Change the BridgePassword feature (part of the "bridge community"
  17620. design, which is not yet implemented) to use a time-independent
  17621. comparison. The old behavior might have allowed an adversary
  17622. to use timing to guess the BridgePassword value. Fixes bug 5543;
  17623. bugfix on 0.2.0.14-alpha.
  17624. - Enforce correct return behavior of tor_vsscanf() when the '%%'
  17625. pattern is used. Fixes bug 5558. Bugfix on 0.2.1.13.
  17626. - When sending an HTTP/1.1 proxy request, include a Host header.
  17627. Fixes bug 5593; bugfix on 0.2.2.1-alpha.
  17628. - Don't log that we have "decided to publish new relay descriptor"
  17629. unless we are actually publishing a descriptor. Fixes bug 3942;
  17630. bugfix on 0.2.2.28-beta.
  17631. o Minor bugfixes (0.2.3.x):
  17632. - Fix a bug where a bridge authority crashes (on a failed assert)
  17633. if it has seen no directory requests when it's time to write
  17634. statistics to disk. Fixes bug 5508. Bugfix on 0.2.3.6-alpha.
  17635. - Fix bug stomping on ORPort option NoListen and ignoring option
  17636. NoAdvertise. Fixes bug 5151; bugfix on 0.2.3.9-alpha.
  17637. - In the testsuite, provide a large enough buffer in the tor_sscanf
  17638. unit test. Otherwise we'd overrun that buffer and crash during
  17639. the unit tests. Found by weasel. Fixes bug 5449; bugfix on
  17640. 0.2.3.12-alpha.
  17641. - Make sure we create the keys directory if it doesn't exist and we're
  17642. about to store the dynamic Diffie-Hellman parameters. Fixes bug
  17643. 5572; bugfix on 0.2.3.13-alpha.
  17644. - Fix a small memory leak when trying to decode incorrect base16
  17645. authenticator during SAFECOOKIE authentication. Found by
  17646. Coverity Scan. Fixes CID 507. Bugfix on 0.2.3.13-alpha.
  17647. o Minor features:
  17648. - Add more information to a log statement that might help track down
  17649. bug 4091. If you're seeing "Bug: tor_addr_is_internal() called with a
  17650. non-IP address" messages (or any Bug messages, for that matter!),
  17651. please let us know about it.
  17652. - Relays now understand an IPv6 address when they get one from a
  17653. directory server. Resolves ticket 4875.
  17654. - Resolve IPv6 addresses in bridge and entry statistics to country
  17655. code "??" which means we at least count them. Resolves ticket 5053;
  17656. improves on 0.2.3.9-alpha.
  17657. - Update to the April 3 2012 Maxmind GeoLite Country database.
  17658. - Begin a doc/state-contents.txt file to explain the contents of
  17659. the Tor state file. Fixes bug 2987.
  17660. o Default torrc changes:
  17661. - Stop listing "socksport 9050" in torrc.sample. We open a socks
  17662. port on 9050 by default anyway, so this should not change anything
  17663. in practice.
  17664. - Stop mentioning the deprecated *ListenAddress options in
  17665. torrc.sample. Fixes bug 5438.
  17666. - Document unit of bandwidth related options in sample torrc.
  17667. Fixes bug 5621.
  17668. o Removed features:
  17669. - The "torify" script no longer supports the "tsocks" socksifier
  17670. tool, since tsocks doesn't support DNS and UDP right for Tor.
  17671. Everyone should be using torsocks instead. Fixes bugs 3530 and
  17672. 5180. Based on a patch by "ugh".
  17673. o Code refactoring:
  17674. - Change the symmetric cipher interface so that creating and
  17675. initializing a stream cipher are no longer separate functions.
  17676. - Remove all internal support for unpadded RSA. We never used it, and
  17677. it would be a bad idea to start.
  17678. Changes in version 0.2.3.13-alpha - 2012-03-26
  17679. Tor 0.2.3.13-alpha fixes a variety of stability and correctness bugs
  17680. in managed pluggable transports, as well as providing other cleanups
  17681. that get us closer to a release candidate.
  17682. o Directory authority changes:
  17683. - Change IP address for maatuska (v3 directory authority).
  17684. o Security fixes:
  17685. - Provide controllers with a safer way to implement the cookie
  17686. authentication mechanism. With the old method, if another locally
  17687. running program could convince a controller that it was the Tor
  17688. process, then that program could trick the controller into telling
  17689. it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
  17690. authentication method uses a challenge-response approach to prevent
  17691. this attack. Fixes bug 5185, implements proposal 193.
  17692. - Never use a bridge or a controller-supplied node as an exit, even
  17693. if its exit policy allows it. Found by wanoskarnet. Fixes bug
  17694. 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
  17695. and 0.2.0.3-alpha (for bridge-purpose descriptors).
  17696. - Only build circuits if we have a sufficient threshold of the total
  17697. descriptors that are marked in the consensus with the "Exit"
  17698. flag. This mitigates an attack proposed by wanoskarnet, in which
  17699. all of a client's bridges collude to restrict the exit nodes that
  17700. the client knows about. Fixes bug 5343.
  17701. o Major bugfixes (on Tor 0.2.3.x):
  17702. - Avoid an assert when managed proxies like obfsproxy are configured,
  17703. and we receive HUP signals or setconf attempts too rapidly. This
  17704. situation happens most commonly when Vidalia tries to attach to
  17705. Tor or tries to configure the Tor it's attached to. Fixes bug 5084;
  17706. bugfix on 0.2.3.6-alpha.
  17707. - Fix a relay-side pluggable transports bug where managed proxies were
  17708. unreachable from the Internet, because Tor asked them to bind on
  17709. localhost. Fixes bug 4725; bugfix on 0.2.3.9-alpha.
  17710. - Stop discarding command-line arguments when TestingTorNetwork
  17711. is set. Discovered by Kevin Bauer. Fixes bug 5373; bugfix on
  17712. 0.2.3.9-alpha, where task 4552 added support for two layers of
  17713. torrc files.
  17714. - Resume allowing the unit tests to run in gdb. This was accidentally
  17715. made impossible when the DisableDebuggerAttachment option was
  17716. introduced. Fixes bug 5448; bugfix on 0.2.3.9-alpha.
  17717. - Resume building with nat-pmp support. Fixes bug 4955; bugfix on
  17718. 0.2.3.11-alpha. Reported by Anthony G. Basile.
  17719. o Minor bugfixes (on 0.2.2.x and earlier):
  17720. - Ensure we don't cannibalize circuits that are longer than three hops
  17721. already, so we don't end up making circuits with 5 or more
  17722. hops. Patch contributed by wanoskarnet. Fixes bug 5231; bugfix on
  17723. 0.1.0.1-rc which introduced cannibalization.
  17724. - Detect and reject certain misformed escape sequences in
  17725. configuration values. Previously, these values would cause us
  17726. to crash if received in a torrc file or over an authenticated
  17727. control port. Bug found by Esteban Manchado Velázquez, and
  17728. independently by Robert Connolly from Matta Consulting who further
  17729. noted that it allows a post-authentication heap overflow. Patch
  17730. by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
  17731. bugfix on 0.2.0.16-alpha.
  17732. - Fix a compile warning when using the --enable-openbsd-malloc
  17733. configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
  17734. - Directory caches no longer refuse to clean out descriptors because
  17735. of missing v2 networkstatus documents, unless they're configured
  17736. to retrieve v2 networkstatus documents. Fixes bug 4838; bugfix on
  17737. 0.2.2.26-beta. Patch by Daniel Bryg.
  17738. - Update to the latest version of the tinytest unit testing framework.
  17739. This includes a couple of bugfixes that can be relevant for
  17740. running forked unit tests on Windows, and removes all reserved
  17741. identifiers.
  17742. o Minor bugfixes (on 0.2.3.x):
  17743. - On a failed pipe() call, don't leak file descriptors. Fixes bug
  17744. 4296; bugfix on 0.2.3.1-alpha.
  17745. - Spec conformance: on a v3 handshake, do not send a NETINFO cell
  17746. until after we have received a CERTS cell. Fixes bug 4361; bugfix
  17747. on 0.2.3.6-alpha. Patch by "frosty".
  17748. - When binding to an IPv6 address, set the IPV6_V6ONLY socket
  17749. option, so that the IP stack doesn't decide to use it for IPv4
  17750. too. Fixes bug 4760; bugfix on 0.2.3.9-alpha.
  17751. - Ensure that variables set in Tor's environment cannot override
  17752. environment variables that Tor passes to a managed
  17753. pluggable-transport proxy. Previously, Tor would pass every
  17754. variable in its environment to managed proxies along with the new
  17755. ones, in such a way that on many operating systems, the inherited
  17756. environment variables would override those which Tor tried to
  17757. explicitly set. Bugfix on 0.2.3.12-alpha for most Unixoid systems;
  17758. bugfix on 0.2.3.9-alpha for Windows.
  17759. o Minor features:
  17760. - A wide variety of new unit tests by Esteban Manchado Velázquez.
  17761. - Shorten links in the tor-exit-notice file. Patch by Christian Kujau.
  17762. - Update to the March 6 2012 Maxmind GeoLite Country database.
  17763. Changes in version 0.2.3.12-alpha - 2012-02-13
  17764. Tor 0.2.3.12-alpha lets fast exit relays scale better, allows clients
  17765. to use bridges that run Tor 0.2.2.x, and resolves several big bugs
  17766. when Tor is configured to use a pluggable transport like obfsproxy.
  17767. o Major bugfixes:
  17768. - Fix builds when the path to sed, openssl, or sha1sum contains
  17769. spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
  17770. on 0.2.2.1-alpha.
  17771. - Set the SO_REUSEADDR socket option before we call bind() on outgoing
  17772. connections. This change should allow busy exit relays to stop
  17773. running out of available sockets as quickly. Fixes bug 4950;
  17774. bugfix on 0.2.2.26-beta.
  17775. - Allow 0.2.3.x clients to use 0.2.2.x bridges. Previously the client
  17776. would ask the bridge for microdescriptors, which are only supported
  17777. in 0.2.3.x, and then fail to bootstrap when it didn't get the
  17778. answers it wanted. Fixes bug 4013; bugfix on 0.2.3.2-alpha.
  17779. - Properly set up obfsproxy's environment when in managed mode. The
  17780. Tor Browser Bundle needs LD_LIBRARY_PATH to be passed to obfsproxy,
  17781. and when you run your Tor as a daemon, there's no HOME. Fixes bugs
  17782. 5076 and 5082; bugfix on 0.2.3.6-alpha.
  17783. o Minor features:
  17784. - Use the dead_strip option when building Tor on OS X. This reduces
  17785. binary size by almost 19% when linking openssl and libevent
  17786. statically, which we do for Tor Browser Bundle.
  17787. - Fix broken URLs in the sample torrc file, and tell readers about
  17788. the OutboundBindAddress, ExitPolicyRejectPrivate, and
  17789. PublishServerDescriptor options. Addresses bug 4652.
  17790. - Update to the February 7 2012 Maxmind GeoLite Country database.
  17791. o Minor bugfixes:
  17792. - Downgrade the "We're missing a certificate" message from notice
  17793. to info: people kept mistaking it for a real problem, whereas it
  17794. is seldom the problem even when we are failing to bootstrap. Fixes
  17795. bug 5067; bugfix on 0.2.0.10-alpha.
  17796. - Don't put "TOR_PT_EXTENDED_SERVER_PORT=127.0.0.1:4200" in a
  17797. managed pluggable transport server proxy's environment.
  17798. Previously, we would put it there, even though Tor doesn't
  17799. implement an 'extended server port' yet, and even though Tor
  17800. almost certainly isn't listening at that address. For now, we set
  17801. it to an empty string to avoid crashing older obfsproxies. Bugfix
  17802. on 0.2.3.6-alpha.
  17803. - Log the heartbeat message every HeartbeatPeriod seconds, not every
  17804. HeartbeatPeriod + 1 seconds. Fixes bug 4942; bugfix on
  17805. 0.2.3.1-alpha. Bug reported by Scott Bennett.
  17806. - Calculate absolute paths correctly on Windows. Fixes bug 4973;
  17807. bugfix on 0.2.3.11-alpha.
  17808. - Update "ClientOnly" man page entry to explain that there isn't
  17809. really any point to messing with it. Resolves ticket 5005.
  17810. - Use the correct CVE number for CVE-2011-4576 in our comments and
  17811. log messages. Found by "fermenthor". Resolves bug 5066; bugfix on
  17812. 0.2.3.11-alpha.
  17813. o Code simplifications and refactoring:
  17814. - Use the _WIN32 macro throughout our code to detect Windows.
  17815. (Previously we had used the obsolete 'WIN32' and the idiosyncratic
  17816. 'MS_WINDOWS'.)
  17817. Changes in version 0.2.3.11-alpha - 2012-01-22
  17818. Tor 0.2.3.11-alpha marks feature-freeze for the 0.2.3 tree. It deploys
  17819. the last step of the plan to limit maximum circuit length, includes
  17820. a wide variety of hidden service performance and correctness fixes,
  17821. works around an OpenSSL security flaw if your distro is too stubborn
  17822. to upgrade, and fixes a bunch of smaller issues.
  17823. o Major features:
  17824. - Now that Tor 0.2.0.x is completely deprecated, enable the final
  17825. part of "Proposal 110: Avoiding infinite length circuits" by
  17826. refusing all circuit-extend requests that do not use a relay_early
  17827. cell. This change helps Tor resist a class of denial-of-service
  17828. attacks by limiting the maximum circuit length.
  17829. - Adjust the number of introduction points that a hidden service
  17830. will try to maintain based on how long its introduction points
  17831. remain in use and how many introductions they handle. Fixes
  17832. part of bug 3825.
  17833. - Try to use system facilities for enumerating local interface
  17834. addresses, before falling back to our old approach (which was
  17835. binding a UDP socket, and calling getsockname() on it). That
  17836. approach was scaring OS X users whose draconian firewall
  17837. software warned about binding to UDP sockets, regardless of
  17838. whether packets were sent. Now we try to use getifaddrs(),
  17839. SIOCGIFCONF, or GetAdaptersAddresses(), depending on what the
  17840. system supports. Resolves ticket 1827.
  17841. o Major security workaround:
  17842. - When building or running with any version of OpenSSL earlier
  17843. than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
  17844. versions have a bug (CVE-2011-4576) in which their block cipher
  17845. padding includes uninitialized data, potentially leaking sensitive
  17846. information to any peer with whom they make a SSLv3 connection. Tor
  17847. does not use SSL v3 by default, but a hostile client or server
  17848. could force an SSLv3 connection in order to gain information that
  17849. they shouldn't have been able to get. The best solution here is to
  17850. upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
  17851. or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
  17852. to make sure that the bug can't happen.
  17853. o Major bugfixes:
  17854. - Fix the SOCKET_OK test that we use to tell when socket
  17855. creation fails so that it works on Win64. Fixes part of bug 4533;
  17856. bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
  17857. - Correct our replacements for the timeradd() and timersub() functions
  17858. on platforms that lack them (for example, Windows). The timersub()
  17859. function is used when expiring circuits, while timeradd() is
  17860. currently unused. Bug report and patch by Vektor. Fixes bug 4778;
  17861. bugfix on 0.2.2.24-alpha and 0.2.3.1-alpha.
  17862. - Do not use OpenSSL 1.0.0's counter mode: it has a critical bug
  17863. that was fixed in OpenSSL 1.0.0a. We test for the counter mode
  17864. bug at runtime, not compile time, because some distributions hack
  17865. their OpenSSL to mis-report its version. Fixes bug 4779; bugfix
  17866. on 0.2.3.9-alpha. Found by Pascal.
  17867. o Minor features (controller):
  17868. - Use absolute path names when reporting the torrc filename in the
  17869. control protocol, so a controller can more easily find the torrc
  17870. file. Resolves bug 1101.
  17871. - Extend the control protocol to report flags that control a circuit's
  17872. path selection in CIRC events and in replies to 'GETINFO
  17873. circuit-status'. Implements part of ticket 2411.
  17874. - Extend the control protocol to report the hidden service address
  17875. and current state of a hidden-service-related circuit in CIRC
  17876. events and in replies to 'GETINFO circuit-status'. Implements part
  17877. of ticket 2411.
  17878. - When reporting the path to the cookie file to the controller,
  17879. give an absolute path. Resolves ticket 4881.
  17880. - Allow controllers to request an event notification whenever a
  17881. circuit is cannibalized or its purpose is changed. Implements
  17882. part of ticket 3457.
  17883. - Include the creation time of a circuit in CIRC and CIRC2
  17884. control-port events and the list produced by the 'GETINFO
  17885. circuit-status' control-port command.
  17886. o Minor features (directory authorities):
  17887. - Directory authorities now reject versions of Tor older than
  17888. 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
  17889. inclusive. These versions accounted for only a small fraction of
  17890. the Tor network, and have numerous known security issues. Resolves
  17891. issue 4788.
  17892. - Authority operators can now vote for all relays in a given
  17893. set of countries to be BadDir/BadExit/Invalid/Rejected.
  17894. - Provide two consensus parameters (FastFlagMinThreshold and
  17895. FastFlagMaxThreshold) to control the range of allowable bandwidths
  17896. for the Fast directory flag. These allow authorities to run
  17897. experiments on appropriate requirements for being a "Fast" node.
  17898. The AuthDirFastGuarantee config value still applies. Implements
  17899. ticket 3946.
  17900. - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
  17901. directory authority option (introduced in Tor 0.2.2.34).
  17902. o Minor features (other):
  17903. - Don't disable the DirPort when we cannot exceed our AccountingMax
  17904. limit during this interval because the effective bandwidthrate is
  17905. low enough. This is useful in a situation where AccountMax is only
  17906. used as an additional safeguard or to provide statistics.
  17907. - Prepend an informative header to generated dynamic_dh_params files.
  17908. - If EntryNodes are given, but UseEntryGuards is set to 0, warn that
  17909. EntryNodes will have no effect. Resolves issue 2571.
  17910. - Log more useful messages when we fail to disable debugger
  17911. attachment.
  17912. - Log which authority we're missing votes from when we go to fetch
  17913. them from the other auths.
  17914. - Log (at debug level) whenever a circuit's purpose is changed.
  17915. - Add missing documentation for the MaxClientCircuitsPending,
  17916. UseMicrodescriptors, UserspaceIOCPBuffers, and
  17917. _UseFilteringSSLBufferevents options, all introduced during
  17918. the 0.2.3.x series.
  17919. - Update to the January 3 2012 Maxmind GeoLite Country database.
  17920. o Minor bugfixes (hidden services):
  17921. - Don't close hidden service client circuits which have almost
  17922. finished connecting to their destination when they reach
  17923. the normal circuit-build timeout. Previously, we would close
  17924. introduction circuits which are waiting for an acknowledgement
  17925. from the introduction point, and rendezvous circuits which have
  17926. been specified in an INTRODUCE1 cell sent to a hidden service,
  17927. after the normal CBT. Now, we mark them as 'timed out', and launch
  17928. another rendezvous attempt in parallel. This behavior change can
  17929. be disabled using the new CloseHSClientCircuitsImmediatelyOnTimeout
  17930. option. Fixes part of bug 1297; bugfix on 0.2.2.2-alpha.
  17931. - Don't close hidden-service-side rendezvous circuits when they
  17932. reach the normal circuit-build timeout. This behavior change can
  17933. be disabled using the new
  17934. CloseHSServiceRendCircuitsImmediatelyOnTimeout option. Fixes the
  17935. remaining part of bug 1297; bugfix on 0.2.2.2-alpha.
  17936. - Make sure we never mark the wrong rendezvous circuit as having
  17937. had its introduction cell acknowledged by the introduction-point
  17938. relay. Previously, when we received an INTRODUCE_ACK cell on a
  17939. client-side hidden-service introduction circuit, we might have
  17940. marked a rendezvous circuit other than the one we specified in
  17941. the INTRODUCE1 cell as INTRO_ACKED, which would have produced
  17942. a warning message and interfered with the hidden service
  17943. connection-establishment process. Fixes bug 4759; bugfix on
  17944. 0.2.3.3-alpha, when we added the stream-isolation feature which
  17945. might cause Tor to open multiple rendezvous circuits for the same
  17946. hidden service.
  17947. - Don't trigger an assertion failure when we mark a new client-side
  17948. hidden-service introduction circuit for close during the process
  17949. of creating it. Fixes bug 4796; bugfix on 0.2.3.6-alpha. Reported
  17950. by murb.
  17951. o Minor bugfixes (log messages):
  17952. - Correctly spell "connect" in a log message on failure to create a
  17953. controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta and
  17954. 0.2.3.2-alpha.
  17955. - Fix a typo in a log message in rend_service_rendezvous_has_opened().
  17956. Fixes bug 4856; bugfix on Tor 0.0.6.
  17957. - Fix the log message describing how we work around discovering
  17958. that our version is the ill-fated OpenSSL 0.9.8l. Fixes bug
  17959. 4837; bugfix on 0.2.2.9-alpha.
  17960. - When logging about a disallowed .exit name, do not also call it
  17961. an "invalid onion address". Fixes bug 3325; bugfix on 0.2.2.9-alpha.
  17962. o Minor bugfixes (build fixes):
  17963. - During configure, detect when we're building with clang version
  17964. 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
  17965. CFLAGS. clang doesn't support them yet.
  17966. - During configure, search for library containing cos function as
  17967. libm lives in libcore on some platforms (BeOS/Haiku). Linking
  17968. against libm was hard-coded before. Fixes the first part of bug
  17969. 4727; bugfix on 0.2.2.2-alpha. Patch and analysis by Martin Hebnes
  17970. Pedersen.
  17971. - Detect attempts to build Tor on (as yet hypothetical) versions
  17972. of Windows where sizeof(intptr_t) != sizeof(SOCKET). Partial
  17973. fix for bug 4533. Bugfix on 0.2.2.28-beta.
  17974. - Preprocessor directives should not be put inside the arguments
  17975. of a macro. This would break compilation with GCC releases prior
  17976. to version 3.3. We would never recommend such an old GCC version,
  17977. but it is apparently required for binary compatibility on some
  17978. platforms (namely, certain builds of Haiku). Fixes the other part
  17979. of bug 4727; bugfix on 0.2.3.3-alpha. Patch and analysis by Martin
  17980. Hebnes Pedersen.
  17981. o Minor bugfixes (other):
  17982. - Older Linux kernels erroneously respond to strange nmap behavior
  17983. by having accept() return successfully with a zero-length
  17984. socket. When this happens, just close the connection. Previously,
  17985. we would try harder to learn the remote address: but there was
  17986. no such remote address to learn, and our method for trying to
  17987. learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
  17988. on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
  17989. - Fix null-pointer access that could occur if TLS allocation failed.
  17990. Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un". This was
  17991. erroneously listed as fixed in 0.2.3.9-alpha, but the fix had
  17992. accidentally been reverted.
  17993. - Fix our implementation of crypto_random_hostname() so it can't
  17994. overflow on ridiculously large inputs. (No Tor version has ever
  17995. provided this kind of bad inputs, but let's be correct in depth.)
  17996. Fixes bug 4413; bugfix on 0.2.2.9-alpha. Fix by Stephen Palmateer.
  17997. - Find more places in the code that should have been testing for
  17998. invalid sockets using the SOCKET_OK macro. Required for a fix
  17999. for bug 4533. Bugfix on 0.2.2.28-beta.
  18000. - Fix an assertion failure when, while running with bufferevents, a
  18001. connection finishes connecting after it is marked for close, but
  18002. before it is closed. Fixes bug 4697; bugfix on 0.2.3.1-alpha.
  18003. - test_util_spawn_background_ok() hardcoded the expected value
  18004. for ENOENT to 2. This isn't portable as error numbers are
  18005. platform specific, and particularly the hurd has ENOENT at
  18006. 0x40000002. Construct expected string at runtime, using the correct
  18007. value for ENOENT. Fixes bug 4733; bugfix on 0.2.3.1-alpha.
  18008. - Reject attempts to disable DisableDebuggerAttachment while Tor is
  18009. running. Fixes bug 4650; bugfix on 0.2.3.9-alpha.
  18010. - Use an appropriate-width type for sockets in tor-fw-helper on
  18011. win64. Fixes bug 1983 at last. Bugfix on 0.2.3.9-alpha.
  18012. o Feature removal:
  18013. - When sending or relaying a RELAY_EARLY cell, we used to convert
  18014. it to a RELAY cell if the connection was using the v1 link
  18015. protocol. This was a workaround for older versions of Tor, which
  18016. didn't handle RELAY_EARLY cells properly. Now that all supported
  18017. versions can handle RELAY_EARLY cells, and now that we're enforcing
  18018. the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
  18019. remove this workaround. Addresses bug 4786.
  18020. o Code simplifications and refactoring:
  18021. - Use OpenSSL's built-in SSL_state_string_long() instead of our
  18022. own homebrewed ssl_state_to_string() replacement. Patch from
  18023. Emile Snyder. Fixes bug 4653.
  18024. - Use macros to indicate OpenSSL versions, so we don't need to worry
  18025. about accidental hexadecimal bit shifts.
  18026. - Remove some workaround code for OpenSSL 0.9.6 (which is no longer
  18027. supported).
  18028. - Convert more instances of tor_snprintf+tor_strdup into tor_asprintf.
  18029. - Use the smartlist_add_asprintf() alias more consistently.
  18030. - Use a TOR_INVALID_SOCKET macro when initializing a socket to an
  18031. invalid value, rather than just -1.
  18032. - Rename a handful of old identifiers, mostly related to crypto
  18033. structures and crypto functions. By convention, our "create an
  18034. object" functions are called "type_new()", our "free an object"
  18035. functions are called "type_free()", and our types indicate that
  18036. they are types only with a final "_t". But a handful of older
  18037. types and functions broke these rules, with function names like
  18038. "type_create" or "subsystem_op_type", or with type names like
  18039. type_env_t.
  18040. Changes in version 0.2.3.10-alpha - 2011-12-16
  18041. Tor 0.2.3.10-alpha fixes a critical heap-overflow security issue in
  18042. Tor's buffers code. Absolutely everybody should upgrade.
  18043. The bug relied on an incorrect calculation when making data continuous
  18044. in one of our IO buffers, if the first chunk of the buffer was
  18045. misaligned by just the wrong amount. The miscalculation would allow an
  18046. attacker to overflow a piece of heap-allocated memory. To mount this
  18047. attack, the attacker would need to either open a SOCKS connection to
  18048. Tor's SocksPort (usually restricted to localhost), or target a Tor
  18049. instance configured to make its connections through a SOCKS proxy
  18050. (which Tor does not do by default).
  18051. Good security practice requires that all heap-overflow bugs should be
  18052. presumed to be exploitable until proven otherwise, so we are treating
  18053. this as a potential code execution attack. Please upgrade immediately!
  18054. This bug does not affect bufferevents-based builds of Tor. Special
  18055. thanks to "Vektor" for reporting this issue to us!
  18056. This release also contains a few minor bugfixes for issues discovered
  18057. in 0.2.3.9-alpha.
  18058. o Major bugfixes:
  18059. - Fix a heap overflow bug that could occur when trying to pull
  18060. data into the first chunk of a buffer, when that chunk had
  18061. already had some data drained from it. Fixes CVE-2011-2778;
  18062. bugfix on 0.2.0.16-alpha. Reported by "Vektor".
  18063. o Minor bugfixes:
  18064. - If we can't attach streams to a rendezvous circuit when we
  18065. finish connecting to a hidden service, clear the rendezvous
  18066. circuit's stream-isolation state and try to attach streams
  18067. again. Previously, we cleared rendezvous circuits' isolation
  18068. state either too early (if they were freshly built) or not at all
  18069. (if they had been built earlier and were cannibalized). Bugfix on
  18070. 0.2.3.3-alpha; fixes bug 4655.
  18071. - Fix compilation of the libnatpmp helper on non-Windows. Bugfix on
  18072. 0.2.3.9-alpha; fixes bug 4691. Reported by Anthony G. Basile.
  18073. - Fix an assertion failure when a relay with accounting enabled
  18074. starts up while dormant. Fixes bug 4702; bugfix on 0.2.3.9-alpha.
  18075. o Minor features:
  18076. - Update to the December 6 2011 Maxmind GeoLite Country database.
  18077. Changes in version 0.2.2.35 - 2011-12-16
  18078. Tor 0.2.2.35 fixes a critical heap-overflow security issue in Tor's
  18079. buffers code. Absolutely everybody should upgrade.
  18080. The bug relied on an incorrect calculation when making data continuous
  18081. in one of our IO buffers, if the first chunk of the buffer was
  18082. misaligned by just the wrong amount. The miscalculation would allow an
  18083. attacker to overflow a piece of heap-allocated memory. To mount this
  18084. attack, the attacker would need to either open a SOCKS connection to
  18085. Tor's SocksPort (usually restricted to localhost), or target a Tor
  18086. instance configured to make its connections through a SOCKS proxy
  18087. (which Tor does not do by default).
  18088. Good security practice requires that all heap-overflow bugs should be
  18089. presumed to be exploitable until proven otherwise, so we are treating
  18090. this as a potential code execution attack. Please upgrade immediately!
  18091. This bug does not affect bufferevents-based builds of Tor. Special
  18092. thanks to "Vektor" for reporting this issue to us!
  18093. Tor 0.2.2.35 also fixes several bugs in previous versions, including
  18094. crash bugs for unusual configurations, and a long-term bug that
  18095. would prevent Tor from starting on Windows machines with draconian
  18096. AV software.
  18097. With this release, we remind everyone that 0.2.0.x has reached its
  18098. formal end-of-life. Those Tor versions have many known flaws, and
  18099. nobody should be using them. You should upgrade -- ideally to the
  18100. 0.2.2.x series. If you're using a Linux or BSD and its packages are
  18101. obsolete, stop using those packages and upgrade anyway.
  18102. The Tor 0.2.1.x series is also approaching its end-of-life: it will no
  18103. longer receive support after some time in early 2012.
  18104. o Major bugfixes:
  18105. - Fix a heap overflow bug that could occur when trying to pull
  18106. data into the first chunk of a buffer, when that chunk had
  18107. already had some data drained from it. Fixes CVE-2011-2778;
  18108. bugfix on 0.2.0.16-alpha. Reported by "Vektor".
  18109. - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
  18110. that it doesn't attempt to allocate a socketpair. This could cause
  18111. some problems on Windows systems with overzealous firewalls. Fix for
  18112. bug 4457; workaround for Libevent versions 2.0.1-alpha through
  18113. 2.0.15-stable.
  18114. - If we mark an OR connection for close based on a cell we process,
  18115. don't process any further cells on it. We already avoid further
  18116. reads on marked-for-close connections, but now we also discard the
  18117. cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
  18118. which was the first version where we might mark a connection for
  18119. close based on processing a cell on it.
  18120. - Correctly sanity-check that we don't underflow on a memory
  18121. allocation (and then assert) for hidden service introduction
  18122. point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
  18123. bugfix on 0.2.1.5-alpha.
  18124. - Fix a memory leak when we check whether a hidden service
  18125. descriptor has any usable introduction points left. Fixes bug
  18126. 4424. Bugfix on 0.2.2.25-alpha.
  18127. - Don't crash when we're running as a relay and don't have a GeoIP
  18128. file. Bugfix on 0.2.2.34; fixes bug 4340. This backports a fix
  18129. we've had in the 0.2.3.x branch already.
  18130. - When running as a client, do not print a misleading (and plain
  18131. wrong) log message that we're collecting "directory request"
  18132. statistics: clients don't collect statistics. Also don't create a
  18133. useless (because empty) stats file in the stats/ directory. Fixes
  18134. bug 4353; bugfix on 0.2.2.34.
  18135. o Minor bugfixes:
  18136. - Detect failure to initialize Libevent. This fix provides better
  18137. detection for future instances of bug 4457.
  18138. - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
  18139. function. This was eating up hideously large amounts of time on some
  18140. busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
  18141. - Resolve an integer overflow bug in smartlist_ensure_capacity().
  18142. Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
  18143. Mansour Moufid.
  18144. - Don't warn about unused log_mutex in log.c when building with
  18145. --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
  18146. 0.1.0.6-rc which introduced --disable-threads.
  18147. - When configuring, starting, or stopping an NT service, stop
  18148. immediately after the service configuration attempt has succeeded
  18149. or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
  18150. - When sending a NETINFO cell, include the original address
  18151. received for the other side, not its canonical address. Found
  18152. by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
  18153. - Fix a typo in a hibernation-related log message. Fixes bug 4331;
  18154. bugfix on 0.2.2.23-alpha; found by "tmpname0901".
  18155. - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
  18156. occurred when a client tried to fetch a descriptor for a bridge
  18157. in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
  18158. - Backport fixes for a pair of compilation warnings on Windows.
  18159. Fixes bug 4521; bugfix on 0.2.2.28-beta and on 0.2.2.29-beta.
  18160. - If we had ever tried to call tor_addr_to_str on an address of
  18161. unknown type, we would have done a strdup on an uninitialized
  18162. buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
  18163. Reported by "troll_un".
  18164. - Correctly detect and handle transient lookup failures from
  18165. tor_addr_lookup. Fixes bug 4530; bugfix on 0.2.1.5-alpha.
  18166. Reported by "troll_un".
  18167. - Fix null-pointer access that could occur if TLS allocation failed.
  18168. Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
  18169. - Use tor_socket_t type for listener argument to accept(). Fixes bug
  18170. 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
  18171. o Minor features:
  18172. - Add two new config options for directory authorities:
  18173. AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
  18174. Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
  18175. that is always sufficient to satisfy the bandwidth requirement for
  18176. the Guard flag. Now it will be easier for researchers to simulate
  18177. Tor networks with different values. Resolves ticket 4484.
  18178. - When Tor ignores a hidden service specified in its configuration,
  18179. include the hidden service's directory in the warning message.
  18180. Previously, we would only tell the user that some hidden service
  18181. was ignored. Bugfix on 0.0.6; fixes bug 4426.
  18182. - Update to the December 6 2011 Maxmind GeoLite Country database.
  18183. o Packaging changes:
  18184. - Make it easier to automate expert package builds on Windows,
  18185. by removing an absolute path from makensis.exe command.
  18186. Changes in version 0.2.1.32 - 2011-12-16
  18187. Tor 0.2.1.32 backports important security and privacy fixes for
  18188. oldstable. This release is intended only for package maintainers and
  18189. others who cannot use the 0.2.2 stable series. All others should be
  18190. using Tor 0.2.2.x or newer.
  18191. The Tor 0.2.1.x series will reach formal end-of-life some time in
  18192. early 2012; we will stop releasing patches for it then.
  18193. o Major bugfixes (also included in 0.2.2.x):
  18194. - Correctly sanity-check that we don't underflow on a memory
  18195. allocation (and then assert) for hidden service introduction
  18196. point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
  18197. bugfix on 0.2.1.5-alpha.
  18198. - Fix a heap overflow bug that could occur when trying to pull
  18199. data into the first chunk of a buffer, when that chunk had
  18200. already had some data drained from it. Fixes CVE-2011-2778;
  18201. bugfix on 0.2.0.16-alpha. Reported by "Vektor".
  18202. o Minor features:
  18203. - Update to the December 6 2011 Maxmind GeoLite Country database.
  18204. Changes in version 0.2.3.9-alpha - 2011-12-08
  18205. Tor 0.2.3.9-alpha introduces initial IPv6 support for bridges, adds
  18206. a "DisableNetwork" security feature that bundles can use to avoid
  18207. touching the network until bridges are configured, moves forward on
  18208. the pluggable transport design, fixes a flaw in the hidden service
  18209. design that unnecessarily prevented clients with wrong clocks from
  18210. reaching hidden services, and fixes a wide variety of other issues.
  18211. o Major features:
  18212. - Clients can now connect to private bridges over IPv6. Bridges
  18213. still need at least one IPv4 address in order to connect to
  18214. other relays. Note that we don't yet handle the case where the
  18215. user has two bridge lines for the same bridge (one IPv4, one
  18216. IPv6). Implements parts of proposal 186.
  18217. - New "DisableNetwork" config option to prevent Tor from launching any
  18218. connections or accepting any connections except on a control port.
  18219. Bundles and controllers can set this option before letting Tor talk
  18220. to the rest of the network, for example to prevent any connections
  18221. to a non-bridge address. Packages like Orbot can also use this
  18222. option to instruct Tor to save power when the network is off.
  18223. - Clients and bridges can now be configured to use a separate
  18224. "transport" proxy. This approach makes the censorship arms race
  18225. easier by allowing bridges to use protocol obfuscation plugins. It
  18226. implements the "managed proxy" part of proposal 180 (ticket 3472).
  18227. - When using OpenSSL 1.0.0 or later, use OpenSSL's counter mode
  18228. implementation. It makes AES_CTR about 7% faster than our old one
  18229. (which was about 10% faster than the one OpenSSL used to provide).
  18230. Resolves ticket 4526.
  18231. - Add a "tor2web mode" for clients that want to connect to hidden
  18232. services non-anonymously (and possibly more quickly). As a safety
  18233. measure to try to keep users from turning this on without knowing
  18234. what they are doing, tor2web mode must be explicitly enabled at
  18235. compile time, and a copy of Tor compiled to run in tor2web mode
  18236. cannot be used as a normal Tor client. Implements feature 2553.
  18237. - Add experimental support for running on Windows with IOCP and no
  18238. kernel-space socket buffers. This feature is controlled by a new
  18239. "UserspaceIOCPBuffers" config option (off by default), which has
  18240. no effect unless Tor has been built with support for bufferevents,
  18241. is running on Windows, and has enabled IOCP. This may, in the long
  18242. run, help solve or mitigate bug 98.
  18243. - Use a more secure consensus parameter voting algorithm. Now at
  18244. least three directory authorities or a majority of them must
  18245. vote on a given parameter before it will be included in the
  18246. consensus. Implements proposal 178.
  18247. o Major bugfixes:
  18248. - Hidden services now ignore the timestamps on INTRODUCE2 cells.
  18249. They used to check that the timestamp was within 30 minutes
  18250. of their system clock, so they could cap the size of their
  18251. replay-detection cache, but that approach unnecessarily refused
  18252. service to clients with wrong clocks. Bugfix on 0.2.1.6-alpha, when
  18253. the v3 intro-point protocol (the first one which sent a timestamp
  18254. field in the INTRODUCE2 cell) was introduced; fixes bug 3460.
  18255. - Only use the EVP interface when AES acceleration is enabled,
  18256. to avoid a 5-7% performance regression. Resolves issue 4525;
  18257. bugfix on 0.2.3.8-alpha.
  18258. o Privacy/anonymity features (bridge detection):
  18259. - Make bridge SSL certificates a bit more stealthy by using random
  18260. serial numbers, in the same fashion as OpenSSL when generating
  18261. self-signed certificates. Implements ticket 4584.
  18262. - Introduce a new config option "DynamicDHGroups", enabled by
  18263. default, which provides each bridge with a unique prime DH modulus
  18264. to be used during SSL handshakes. This option attempts to help
  18265. against censors who might use the Apache DH modulus as a static
  18266. identifier for bridges. Addresses ticket 4548.
  18267. o Minor features (new/different config options):
  18268. - New configuration option "DisableDebuggerAttachment" (on by default)
  18269. to prevent basic debugging attachment attempts by other processes.
  18270. Supports Mac OS X and Gnu/Linux. Resolves ticket 3313.
  18271. - Allow MapAddress directives to specify matches against super-domains,
  18272. as in "MapAddress *.torproject.org *.torproject.org.torserver.exit".
  18273. Implements issue 933.
  18274. - Slightly change behavior of "list" options (that is, config
  18275. options that can appear more than once) when they appear both in
  18276. torrc and on the command line. Previously, the command-line options
  18277. would be appended to the ones from torrc. Now, the command-line
  18278. options override the torrc options entirely. This new behavior
  18279. allows the user to override list options (like exit policies and
  18280. ports to listen on) from the command line, rather than simply
  18281. appending to the list.
  18282. - You can get the old (appending) command-line behavior for "list"
  18283. options by prefixing the option name with a "+".
  18284. - You can remove all the values for a "list" option from the command
  18285. line without adding any new ones by prefixing the option name
  18286. with a "/".
  18287. - Add experimental support for a "defaults" torrc file to be parsed
  18288. before the regular torrc. Torrc options override the defaults file's
  18289. options in the same way that the command line overrides the torrc.
  18290. The SAVECONF controller command saves only those options which
  18291. differ between the current configuration and the defaults file. HUP
  18292. reloads both files. (Note: This is an experimental feature; its
  18293. behavior will probably be refined in future 0.2.3.x-alpha versions
  18294. to better meet packagers' needs.) Implements task 4552.
  18295. o Minor features:
  18296. - Try to make the introductory warning message that Tor prints on
  18297. startup more useful for actually finding help and information.
  18298. Resolves ticket 2474.
  18299. - Running "make version" now displays the version of Tor that
  18300. we're about to build. Idea from katmagic; resolves issue 4400.
  18301. - Expire old or over-used hidden service introduction points.
  18302. Required by fix for bug 3460.
  18303. - Move the replay-detection cache for the RSA-encrypted parts of
  18304. INTRODUCE2 cells to the introduction point data structures.
  18305. Previously, we would use one replay-detection cache per hidden
  18306. service. Required by fix for bug 3460.
  18307. - Reduce the lifetime of elements of hidden services' Diffie-Hellman
  18308. public key replay-detection cache from 60 minutes to 5 minutes. This
  18309. replay-detection cache is now used only to detect multiple
  18310. INTRODUCE2 cells specifying the same rendezvous point, so we can
  18311. avoid launching multiple simultaneous attempts to connect to it.
  18312. o Minor bugfixes (on Tor 0.2.2.x and earlier):
  18313. - Resolve an integer overflow bug in smartlist_ensure_capacity().
  18314. Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
  18315. Mansour Moufid.
  18316. - Fix a minor formatting issue in one of tor-gencert's error messages.
  18317. Fixes bug 4574.
  18318. - Prevent a false positive from the check-spaces script, by disabling
  18319. the "whitespace between function name and (" check for functions
  18320. named 'op()'.
  18321. - Fix a log message suggesting that people contact a non-existent
  18322. email address. Fixes bug 3448.
  18323. - Fix null-pointer access that could occur if TLS allocation failed.
  18324. Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
  18325. - Report a real bootstrap problem to the controller on router
  18326. identity mismatch. Previously we just said "foo", which probably
  18327. made a lot of sense at the time. Fixes bug 4169; bugfix on
  18328. 0.2.1.1-alpha.
  18329. - If we had ever tried to call tor_addr_to_str() on an address of
  18330. unknown type, we would have done a strdup() on an uninitialized
  18331. buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
  18332. Reported by "troll_un".
  18333. - Correctly detect and handle transient lookup failures from
  18334. tor_addr_lookup(). Fixes bug 4530; bugfix on 0.2.1.5-alpha.
  18335. Reported by "troll_un".
  18336. - Use tor_socket_t type for listener argument to accept(). Fixes bug
  18337. 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
  18338. - Initialize conn->addr to a valid state in spawn_cpuworker(). Fixes
  18339. bug 4532; found by "troll_un".
  18340. o Minor bugfixes (on Tor 0.2.3.x):
  18341. - Fix a compile warning in tor_inet_pton(). Bugfix on 0.2.3.8-alpha;
  18342. fixes bug 4554.
  18343. - Don't send two ESTABLISH_RENDEZVOUS cells when opening a new
  18344. circuit for use as a hidden service client's rendezvous point.
  18345. Fixes bugs 4641 and 4171; bugfix on 0.2.3.3-alpha. Diagnosed
  18346. with help from wanoskarnet.
  18347. - Restore behavior of overriding SocksPort, ORPort, and similar
  18348. options from the command line. Bugfix on 0.2.3.3-alpha.
  18349. o Build fixes:
  18350. - Properly handle the case where the build-tree is not the same
  18351. as the source tree when generating src/common/common_sha1.i,
  18352. src/or/micro-revision.i, and src/or/or_sha1.i. Fixes bug 3953;
  18353. bugfix on 0.2.0.1-alpha.
  18354. o Code simplifications, cleanups, and refactorings:
  18355. - Remove the pure attribute from all functions that used it
  18356. previously. In many cases we assigned it incorrectly, because the
  18357. functions might assert or call impure functions, and we don't have
  18358. evidence that keeping the pure attribute is worthwhile. Implements
  18359. changes suggested in ticket 4421.
  18360. - Remove some dead code spotted by coverity. Fixes cid 432.
  18361. Bugfix on 0.2.3.1-alpha, closes bug 4637.
  18362. Changes in version 0.2.3.8-alpha - 2011-11-22
  18363. Tor 0.2.3.8-alpha fixes some crash and assert bugs, including a
  18364. socketpair-related bug that has been bothering Windows users. It adds
  18365. support to serve microdescriptors to controllers, so Vidalia's network
  18366. map can resume listing relays (once Vidalia implements its side),
  18367. and adds better support for hardware AES acceleration. Finally, it
  18368. starts the process of adjusting the bandwidth cutoff for getting the
  18369. "Fast" flag from 20KB to (currently) 32KB -- preliminary results show
  18370. that tiny relays harm performance more than they help network capacity.
  18371. o Major bugfixes:
  18372. - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
  18373. that it doesn't attempt to allocate a socketpair. This could cause
  18374. some problems on Windows systems with overzealous firewalls. Fix for
  18375. bug 4457; workaround for Libevent versions 2.0.1-alpha through
  18376. 2.0.15-stable.
  18377. - Correctly sanity-check that we don't underflow on a memory
  18378. allocation (and then assert) for hidden service introduction
  18379. point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
  18380. bugfix on 0.2.1.5-alpha.
  18381. - Remove the artificially low cutoff of 20KB to guarantee the Fast
  18382. flag. In the past few years the average relay speed has picked
  18383. up, and while the "top 7/8 of the network get the Fast flag" and
  18384. "all relays with 20KB or more of capacity get the Fast flag" rules
  18385. used to have the same result, now the top 7/8 of the network has
  18386. a capacity more like 32KB. Bugfix on 0.2.1.14-rc. Fixes bug 4489.
  18387. - Fix a rare assertion failure when checking whether a v0 hidden
  18388. service descriptor has any usable introduction points left, and
  18389. we don't have enough information to build a circuit to the first
  18390. intro point named in the descriptor. The HS client code in
  18391. 0.2.3.x no longer uses v0 HS descriptors, but this assertion can
  18392. trigger on (and crash) v0 HS authorities. Fixes bug 4411.
  18393. Bugfix on 0.2.3.1-alpha; diagnosed by frosty_un.
  18394. - Make bridge authorities not crash when they are asked for their own
  18395. descriptor. Bugfix on 0.2.3.7-alpha, reported by Lucky Green.
  18396. - When running as a client, do not print a misleading (and plain
  18397. wrong) log message that we're collecting "directory request"
  18398. statistics: clients don't collect statistics. Also don't create a
  18399. useless (because empty) stats file in the stats/ directory. Fixes
  18400. bug 4353; bugfix on 0.2.2.34 and 0.2.3.7-alpha.
  18401. o Major features:
  18402. - Allow Tor controllers like Vidalia to obtain the microdescriptor
  18403. for a relay by identity digest or nickname. Previously,
  18404. microdescriptors were only available by their own digests, so a
  18405. controller would have to ask for and parse the whole microdescriptor
  18406. consensus in order to look up a single relay's microdesc. Fixes
  18407. bug 3832; bugfix on 0.2.3.1-alpha.
  18408. - Use OpenSSL's EVP interface for AES encryption, so that all AES
  18409. operations can use hardware acceleration (if present). Resolves
  18410. ticket 4442.
  18411. o Minor bugfixes (on 0.2.2.x and earlier):
  18412. - Detect failure to initialize Libevent. This fix provides better
  18413. detection for future instances of bug 4457.
  18414. - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
  18415. function. This was eating up hideously large amounts of time on some
  18416. busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
  18417. - Don't warn about unused log_mutex in log.c when building with
  18418. --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
  18419. 0.1.0.6-rc which introduced --disable-threads.
  18420. - Allow manual 'authenticate' commands to the controller interface
  18421. from netcat (nc) as well as telnet. We were rejecting them because
  18422. they didn't come with the expected whitespace at the end of the
  18423. command. Bugfix on 0.1.1.1-alpha; fixes bug 2893.
  18424. - Fix some (not actually triggerable) buffer size checks in usage of
  18425. tor_inet_ntop. Fixes bug 4434; bugfix on Tor 0.2.0.1-alpha. Patch
  18426. by Anders Sundman.
  18427. - Fix parsing of some corner-cases with tor_inet_pton(). Fixes
  18428. bug 4515; bugfix on 0.2.0.1-alpha; fix by Anders Sundman.
  18429. - When configuring, starting, or stopping an NT service, stop
  18430. immediately after the service configuration attempt has succeeded
  18431. or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
  18432. - When sending a NETINFO cell, include the original address
  18433. received for the other side, not its canonical address. Found
  18434. by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
  18435. - Rename the bench_{aes,dmap} functions to test_*, so that tinytest
  18436. can pick them up when the tests aren't disabled. Bugfix on
  18437. 0.2.2.4-alpha which introduced tinytest.
  18438. - Fix a memory leak when we check whether a hidden service
  18439. descriptor has any usable introduction points left. Fixes bug
  18440. 4424. Bugfix on 0.2.2.25-alpha.
  18441. - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
  18442. occurred when a client tried to fetch a descriptor for a bridge
  18443. in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
  18444. o Minor bugfixes (on 0.2.3.x):
  18445. - Make util unit tests build correctly with MSVC. Bugfix on
  18446. 0.2.3.3-alpha. Patch by Gisle Vanem.
  18447. - Successfully detect AUTH_CHALLENGE cells with no recognized
  18448. authentication type listed. Fixes bug 4367; bugfix on 0.2.3.6-alpha.
  18449. Found by frosty_un.
  18450. - If a relay receives an AUTH_CHALLENGE cell it can't answer,
  18451. it should still send a NETINFO cell to allow the connection to
  18452. become open. Fixes bug 4368; fix on 0.2.3.6-alpha; bug found by
  18453. "frosty".
  18454. - Log less loudly when we get an invalid authentication certificate
  18455. from a source other than a directory authority: it's not unusual
  18456. to see invalid certs because of clock skew. Fixes bug 4370; bugfix
  18457. on 0.2.3.6-alpha.
  18458. - Tolerate servers with more clock skew in their authentication
  18459. certificates than previously. Fixes bug 4371; bugfix on
  18460. 0.2.3.6-alpha.
  18461. - Fix a couple of compile warnings on Windows. Fixes bug 4469; bugfix
  18462. on 0.2.3.4-alpha and 0.2.3.6-alpha.
  18463. o Minor features:
  18464. - Add two new config options for directory authorities:
  18465. AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
  18466. Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
  18467. that is always sufficient to satisfy the bandwidth requirement for
  18468. the Guard flag. Now it will be easier for researchers to simulate
  18469. Tor networks with different values. Resolves ticket 4484.
  18470. - When Tor ignores a hidden service specified in its configuration,
  18471. include the hidden service's directory in the warning message.
  18472. Previously, we would only tell the user that some hidden service
  18473. was ignored. Bugfix on 0.0.6; fixes bug 4426.
  18474. - When we fail to initialize Libevent, retry with IOCP disabled so we
  18475. don't need to turn on multi-threading support in Libevent, which in
  18476. turn requires a working socketpair(). This is a workaround for bug
  18477. 4457, which affects Libevent versions from 2.0.1-alpha through
  18478. 2.0.15-stable.
  18479. - Detect when we try to build on a platform that doesn't define
  18480. AF_UNSPEC to 0. We don't work there, so refuse to compile.
  18481. - Update to the November 1 2011 Maxmind GeoLite Country database.
  18482. o Packaging changes:
  18483. - Make it easier to automate expert package builds on Windows,
  18484. by removing an absolute path from makensis.exe command.
  18485. o Code simplifications and refactoring:
  18486. - Remove some redundant #include directives throughout the code.
  18487. Patch from Andrea Gelmini.
  18488. - Unconditionally use OpenSSL's AES implementation instead of our
  18489. old built-in one. OpenSSL's AES has been better for a while, and
  18490. relatively few servers should still be on any version of OpenSSL
  18491. that doesn't have good optimized assembly AES.
  18492. - Use the name "CERTS" consistently to refer to the new cell type;
  18493. we were calling it CERT in some places and CERTS in others.
  18494. o Testing:
  18495. - Numerous new unit tests for functions in util.c and address.c by
  18496. Anders Sundman.
  18497. - The long-disabled benchmark tests are now split into their own
  18498. ./src/test/bench binary.
  18499. - The benchmark tests can now use more accurate timers than
  18500. gettimeofday() when such timers are available.
  18501. Changes in version 0.2.3.7-alpha - 2011-10-30
  18502. Tor 0.2.3.7-alpha fixes a crash bug in 0.2.3.6-alpha introduced by
  18503. the new v3 handshake. It also resolves yet another bridge address
  18504. enumeration issue.
  18505. o Major bugfixes:
  18506. - If we mark an OR connection for close based on a cell we process,
  18507. don't process any further cells on it. We already avoid further
  18508. reads on marked-for-close connections, but now we also discard the
  18509. cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
  18510. which was the first version where we might mark a connection for
  18511. close based on processing a cell on it.
  18512. - Fix a double-free bug that would occur when we received an invalid
  18513. certificate in a CERT cell in the new v3 handshake. Fixes bug 4343;
  18514. bugfix on 0.2.3.6-alpha.
  18515. - Bridges no longer include their address in NETINFO cells on outgoing
  18516. OR connections, to allow them to blend in better with clients.
  18517. Removes another avenue for enumerating bridges. Reported by
  18518. "troll_un". Fixes bug 4348; bugfix on 0.2.0.10-alpha, when NETINFO
  18519. cells were introduced.
  18520. o Trivial fixes:
  18521. - Fixed a typo in a hibernation-related log message. Fixes bug 4331;
  18522. bugfix on 0.2.2.23-alpha; found by "tmpname0901".
  18523. Changes in version 0.2.3.6-alpha - 2011-10-26
  18524. Tor 0.2.3.6-alpha includes the fix from 0.2.2.34 for a critical
  18525. anonymity vulnerability where an attacker can deanonymize Tor
  18526. users. Everybody should upgrade.
  18527. This release also features support for a new v3 connection handshake
  18528. protocol, and fixes to make hidden service connections more robust.
  18529. o Major features:
  18530. - Implement a new handshake protocol (v3) for authenticating Tors to
  18531. each other over TLS. It should be more resistant to fingerprinting
  18532. than previous protocols, and should require less TLS hacking for
  18533. future Tor implementations. Implements proposal 176.
  18534. - Allow variable-length padding cells to disguise the length of
  18535. Tor's TLS records. Implements part of proposal 184.
  18536. o Privacy/anonymity fixes (clients):
  18537. - Clients and bridges no longer send TLS certificate chains on
  18538. outgoing OR connections. Previously, each client or bridge would
  18539. use the same cert chain for all outgoing OR connections until
  18540. its IP address changes, which allowed any relay that the client
  18541. or bridge contacted to determine which entry guards it is using.
  18542. Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
  18543. - If a relay receives a CREATE_FAST cell on a TLS connection, it
  18544. no longer considers that connection as suitable for satisfying a
  18545. circuit EXTEND request. Now relays can protect clients from the
  18546. CVE-2011-2768 issue even if the clients haven't upgraded yet.
  18547. - Directory authorities no longer assign the Guard flag to relays
  18548. that haven't upgraded to the above "refuse EXTEND requests
  18549. to client connections" fix. Now directory authorities can
  18550. protect clients from the CVE-2011-2768 issue even if neither
  18551. the clients nor the relays have upgraded yet. There's a new
  18552. "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
  18553. to let us transition smoothly, else tomorrow there would be no
  18554. guard relays.
  18555. o Major bugfixes (hidden services):
  18556. - Improve hidden service robustness: when an attempt to connect to
  18557. a hidden service ends, be willing to refetch its hidden service
  18558. descriptors from each of the HSDir relays responsible for them
  18559. immediately. Previously, we would not consider refetching the
  18560. service's descriptors from each HSDir for 15 minutes after the last
  18561. fetch, which was inconvenient if the hidden service was not running
  18562. during the first attempt. Bugfix on 0.2.0.18-alpha; fixes bug 3335.
  18563. - When one of a hidden service's introduction points appears to be
  18564. unreachable, stop trying it. Previously, we would keep trying
  18565. to build circuits to the introduction point until we lost the
  18566. descriptor, usually because the user gave up and restarted Tor.
  18567. Partly fixes bug 3825.
  18568. - Don't launch a useless circuit after failing to use one of a
  18569. hidden service's introduction points. Previously, we would
  18570. launch a new introduction circuit, but not set the hidden service
  18571. which that circuit was intended to connect to, so it would never
  18572. actually be used. A different piece of code would then create a
  18573. new introduction circuit correctly. Bug reported by katmagic and
  18574. found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
  18575. o Major bugfixes (other):
  18576. - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
  18577. that they initiated. Relays could distinguish incoming bridge
  18578. connections from client connections, creating another avenue for
  18579. enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
  18580. Found by "frosty_un".
  18581. - Don't update the AccountingSoftLimitHitAt state file entry whenever
  18582. tor gets started. This prevents a wrong average bandwidth
  18583. estimate, which would cause relays to always start a new accounting
  18584. interval at the earliest possible moment. Fixes bug 2003; bugfix
  18585. on 0.2.2.7-alpha. Reported by BryonEldridge, who also helped
  18586. immensely in tracking this bug down.
  18587. - Fix a crash bug when changing node restrictions while a DNS lookup
  18588. is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
  18589. by "Tey'".
  18590. o Minor bugfixes (on 0.2.2.x and earlier):
  18591. - When a hidden service turns an extra service-side introduction
  18592. circuit into a general-purpose circuit, free the rend_data and
  18593. intro_key fields first, so we won't leak memory if the circuit
  18594. is cannibalized for use as another service-side introduction
  18595. circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
  18596. - Rephrase the log message emitted if the TestSocks check is
  18597. successful. Patch from Fabian Keil; fixes bug 4094.
  18598. - Bridges now skip DNS self-tests, to act a little more stealthily.
  18599. Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
  18600. bridges. Patch by "warms0x".
  18601. - Remove a confusing dollar sign from the example fingerprint in the
  18602. man page, and also make the example fingerprint a valid one. Fixes
  18603. bug 4309; bugfix on 0.2.1.3-alpha.
  18604. - Fix internal bug-checking logic that was supposed to catch
  18605. failures in digest generation so that it will fail more robustly
  18606. if we ask for a nonexistent algorithm. Found by Coverity Scan.
  18607. Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
  18608. - Report any failure in init_keys() calls launched because our
  18609. IP address has changed. Spotted by Coverity Scan. Bugfix on
  18610. 0.1.1.4-alpha; fixes CID 484.
  18611. o Minor bugfixes (on 0.2.3.x):
  18612. - Fix a bug in configure.in that kept it from building a configure
  18613. script with autoconf versions earlier than 2.61. Fixes bug 2430;
  18614. bugfix on 0.2.3.1-alpha.
  18615. - Don't warn users that they are exposing a client port to the
  18616. Internet if they have specified an RFC1918 address. Previously,
  18617. we would warn if the user had specified any non-loopback
  18618. address. Bugfix on 0.2.3.3-alpha. Fixes bug 4018; reported by Tas.
  18619. - Fix memory leaks in the failing cases of the new SocksPort and
  18620. ControlPort code. Found by Coverity Scan. Bugfix on 0.2.3.3-alpha;
  18621. fixes coverity CIDs 485, 486, and 487.
  18622. o Minor features:
  18623. - When a hidden service's introduction point times out, consider
  18624. trying it again during the next attempt to connect to the
  18625. HS. Previously, we would not try it again unless a newly fetched
  18626. descriptor contained it. Required by fixes for bugs 1297 and 3825.
  18627. - The next version of Windows will be called Windows 8, and it has
  18628. a major version of 6, minor version of 2. Correctly identify that
  18629. version instead of calling it "Very recent version". Resolves
  18630. ticket 4153; reported by funkstar.
  18631. - The Bridge Authority now writes statistics on how many bridge
  18632. descriptors it gave out in total, and how many unique descriptors
  18633. it gave out. It also lists how often the most and least commonly
  18634. fetched descriptors were given out, as well as the median and
  18635. 25th/75th percentile. Implements tickets 4200 and 4294.
  18636. - Update to the October 4 2011 Maxmind GeoLite Country database.
  18637. o Code simplifications and refactoring:
  18638. - Remove some old code to remember statistics about which descriptors
  18639. we've served as a directory mirror. The feature wasn't used and
  18640. is outdated now that microdescriptors are around.
  18641. - Rename Tor functions that turn strings into addresses, so that
  18642. "parse" indicates that no hostname resolution occurs, and
  18643. "lookup" indicates that hostname resolution may occur. This
  18644. should help prevent mistakes in the future. Fixes bug 3512.
  18645. Changes in version 0.2.2.34 - 2011-10-26
  18646. Tor 0.2.2.34 fixes a critical anonymity vulnerability where an attacker
  18647. can deanonymize Tor users. Everybody should upgrade.
  18648. The attack relies on four components: 1) Clients reuse their TLS cert
  18649. when talking to different relays, so relays can recognize a user by
  18650. the identity key in her cert. 2) An attacker who knows the client's
  18651. identity key can probe each guard relay to see if that identity key
  18652. is connected to that guard relay right now. 3) A variety of active
  18653. attacks in the literature (starting from "Low-Cost Traffic Analysis
  18654. of Tor" by Murdoch and Danezis in 2005) allow a malicious website to
  18655. discover the guard relays that a Tor user visiting the website is using.
  18656. 4) Clients typically pick three guards at random, so the set of guards
  18657. for a given user could well be a unique fingerprint for her. This
  18658. release fixes components #1 and #2, which is enough to block the attack;
  18659. the other two remain as open research problems. Special thanks to
  18660. "frosty_un" for reporting the issue to us!
  18661. Clients should upgrade so they are no longer recognizable by the TLS
  18662. certs they present. Relays should upgrade so they no longer allow a
  18663. remote attacker to probe them to test whether unpatched clients are
  18664. currently connected to them.
  18665. This release also fixes several vulnerabilities that allow an attacker
  18666. to enumerate bridge relays. Some bridge enumeration attacks still
  18667. remain; see for example proposal 188.
  18668. o Privacy/anonymity fixes (clients):
  18669. - Clients and bridges no longer send TLS certificate chains on
  18670. outgoing OR connections. Previously, each client or bridge would
  18671. use the same cert chain for all outgoing OR connections until
  18672. its IP address changes, which allowed any relay that the client
  18673. or bridge contacted to determine which entry guards it is using.
  18674. Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
  18675. - If a relay receives a CREATE_FAST cell on a TLS connection, it
  18676. no longer considers that connection as suitable for satisfying a
  18677. circuit EXTEND request. Now relays can protect clients from the
  18678. CVE-2011-2768 issue even if the clients haven't upgraded yet.
  18679. - Directory authorities no longer assign the Guard flag to relays
  18680. that haven't upgraded to the above "refuse EXTEND requests
  18681. to client connections" fix. Now directory authorities can
  18682. protect clients from the CVE-2011-2768 issue even if neither
  18683. the clients nor the relays have upgraded yet. There's a new
  18684. "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
  18685. to let us transition smoothly, else tomorrow there would be no
  18686. guard relays.
  18687. o Privacy/anonymity fixes (bridge enumeration):
  18688. - Bridge relays now do their directory fetches inside Tor TLS
  18689. connections, like all the other clients do, rather than connecting
  18690. directly to the DirPort like public relays do. Removes another
  18691. avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
  18692. - Bridges relays now build circuits for themselves in a more similar
  18693. way to how clients build them. Removes another avenue for
  18694. enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
  18695. when bridges were introduced.
  18696. - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
  18697. that they initiated. Relays could distinguish incoming bridge
  18698. connections from client connections, creating another avenue for
  18699. enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
  18700. Found by "frosty_un".
  18701. o Major bugfixes:
  18702. - Fix a crash bug when changing node restrictions while a DNS lookup
  18703. is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
  18704. by "Tey'".
  18705. - Don't launch a useless circuit after failing to use one of a
  18706. hidden service's introduction points. Previously, we would
  18707. launch a new introduction circuit, but not set the hidden service
  18708. which that circuit was intended to connect to, so it would never
  18709. actually be used. A different piece of code would then create a
  18710. new introduction circuit correctly. Bug reported by katmagic and
  18711. found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
  18712. o Minor bugfixes:
  18713. - Change an integer overflow check in the OpenBSD_Malloc code so
  18714. that GCC is less likely to eliminate it as impossible. Patch
  18715. from Mansour Moufid. Fixes bug 4059.
  18716. - When a hidden service turns an extra service-side introduction
  18717. circuit into a general-purpose circuit, free the rend_data and
  18718. intro_key fields first, so we won't leak memory if the circuit
  18719. is cannibalized for use as another service-side introduction
  18720. circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
  18721. - Bridges now skip DNS self-tests, to act a little more stealthily.
  18722. Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
  18723. bridges. Patch by "warms0x".
  18724. - Fix internal bug-checking logic that was supposed to catch
  18725. failures in digest generation so that it will fail more robustly
  18726. if we ask for a nonexistent algorithm. Found by Coverity Scan.
  18727. Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
  18728. - Report any failure in init_keys() calls launched because our
  18729. IP address has changed. Spotted by Coverity Scan. Bugfix on
  18730. 0.1.1.4-alpha; fixes CID 484.
  18731. o Minor bugfixes (log messages and documentation):
  18732. - Remove a confusing dollar sign from the example fingerprint in the
  18733. man page, and also make the example fingerprint a valid one. Fixes
  18734. bug 4309; bugfix on 0.2.1.3-alpha.
  18735. - The next version of Windows will be called Windows 8, and it has
  18736. a major version of 6, minor version of 2. Correctly identify that
  18737. version instead of calling it "Very recent version". Resolves
  18738. ticket 4153; reported by funkstar.
  18739. - Downgrade log messages about circuit timeout calibration from
  18740. "notice" to "info": they don't require or suggest any human
  18741. intervention. Patch from Tom Lowenthal. Fixes bug 4063;
  18742. bugfix on 0.2.2.14-alpha.
  18743. o Minor features:
  18744. - Turn on directory request statistics by default and include them in
  18745. extra-info descriptors. Don't break if we have no GeoIP database.
  18746. Backported from 0.2.3.1-alpha; implements ticket 3951.
  18747. - Update to the October 4 2011 Maxmind GeoLite Country database.
  18748. Changes in version 0.2.1.31 - 2011-10-26
  18749. Tor 0.2.1.31 backports important security and privacy fixes for
  18750. oldstable. This release is intended only for package maintainers and
  18751. others who cannot use the 0.2.2 stable series. All others should be
  18752. using Tor 0.2.2.x or newer.
  18753. o Security fixes (also included in 0.2.2.x):
  18754. - Replace all potentially sensitive memory comparison operations
  18755. with versions whose runtime does not depend on the data being
  18756. compared. This will help resist a class of attacks where an
  18757. adversary can use variations in timing information to learn
  18758. sensitive data. Fix for one case of bug 3122. (Safe memcmp
  18759. implementation by Robert Ransom based partially on code by DJB.)
  18760. - Fix an assert in parsing router descriptors containing IPv6
  18761. addresses. This one took down the directory authorities when
  18762. somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
  18763. o Privacy/anonymity fixes (also included in 0.2.2.x):
  18764. - Clients and bridges no longer send TLS certificate chains on
  18765. outgoing OR connections. Previously, each client or bridge would
  18766. use the same cert chain for all outgoing OR connections until
  18767. its IP address changes, which allowed any relay that the client
  18768. or bridge contacted to determine which entry guards it is using.
  18769. Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
  18770. - If a relay receives a CREATE_FAST cell on a TLS connection, it
  18771. no longer considers that connection as suitable for satisfying a
  18772. circuit EXTEND request. Now relays can protect clients from the
  18773. CVE-2011-2768 issue even if the clients haven't upgraded yet.
  18774. - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
  18775. that they initiated. Relays could distinguish incoming bridge
  18776. connections from client connections, creating another avenue for
  18777. enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
  18778. Found by "frosty_un".
  18779. - When receiving a hidden service descriptor, check that it is for
  18780. the hidden service we wanted. Previously, Tor would store any
  18781. hidden service descriptors that a directory gave it, whether it
  18782. wanted them or not. This wouldn't have let an attacker impersonate
  18783. a hidden service, but it did let directories pre-seed a client
  18784. with descriptors that it didn't want. Bugfix on 0.0.6.
  18785. - Avoid linkability based on cached hidden service descriptors: forget
  18786. all hidden service descriptors cached as a client when processing a
  18787. SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
  18788. - Make the bridge directory authority refuse to answer directory
  18789. requests for "all" descriptors. It used to include bridge
  18790. descriptors in its answer, which was a major information leak.
  18791. Found by "piebeer". Bugfix on 0.2.0.3-alpha.
  18792. - Don't attach new streams to old rendezvous circuits after SIGNAL
  18793. NEWNYM. Previously, we would keep using an existing rendezvous
  18794. circuit if it remained open (i.e. if it were kept open by a
  18795. long-lived stream, or if a new stream were attached to it before
  18796. Tor could notice that it was old and no longer in use). Bugfix on
  18797. 0.1.1.15-rc; fixes bug 3375.
  18798. o Minor bugfixes (also included in 0.2.2.x):
  18799. - When we restart our relay, we might get a successful connection
  18800. from the outside before we've started our reachability tests,
  18801. triggering a warning: "ORPort found reachable, but I have no
  18802. routerinfo yet. Failing to inform controller of success." This
  18803. bug was harmless unless Tor is running under a controller
  18804. like Vidalia, in which case the controller would never get a
  18805. REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
  18806. fixes bug 1172.
  18807. - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
  18808. enabled. Fixes bug 1526.
  18809. - Remove undocumented option "-F" from tor-resolve: it hasn't done
  18810. anything since 0.2.1.16-rc.
  18811. - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
  18812. None of the cases where we did this before were wrong, but by making
  18813. this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
  18814. - Fix a rare crash bug that could occur when a client was configured
  18815. with a large number of bridges. Fixes bug 2629; bugfix on
  18816. 0.2.1.2-alpha. Bugfix by trac user "shitlei".
  18817. - Correct the warning displayed when a rendezvous descriptor exceeds
  18818. the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
  18819. John Brooks.
  18820. - Fix an uncommon assertion failure when running with DNSPort under
  18821. heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
  18822. - When warning about missing zlib development packages during compile,
  18823. give the correct package names. Bugfix on 0.2.0.1-alpha.
  18824. - Require that introduction point keys and onion keys have public
  18825. exponent 65537. Bugfix on 0.2.0.10-alpha.
  18826. - Do not crash when our configuration file becomes unreadable, for
  18827. example due to a permissions change, between when we start up
  18828. and when a controller calls SAVECONF. Fixes bug 3135; bugfix
  18829. on 0.0.9pre6.
  18830. - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
  18831. Fixes bug 3208.
  18832. - Always NUL-terminate the sun_path field of a sockaddr_un before
  18833. passing it to the kernel. (Not a security issue: kernels are
  18834. smart enough to reject bad sockaddr_uns.) Found by Coverity;
  18835. CID #428. Bugfix on Tor 0.2.0.3-alpha.
  18836. - Don't stack-allocate the list of supplementary GIDs when we're
  18837. about to log them. Stack-allocating NGROUPS_MAX gid_t elements
  18838. could take up to 256K, which is way too much stack. Found by
  18839. Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
  18840. o Minor bugfixes (only in 0.2.1.x):
  18841. - Resume using micro-version numbers in 0.2.1.x: our Debian packages
  18842. rely on them. Bugfix on 0.2.1.30.
  18843. - Use git revisions instead of svn revisions when generating our
  18844. micro-version numbers. Bugfix on 0.2.1.15-rc; fixes bug 2402.
  18845. o Minor features (also included in 0.2.2.x):
  18846. - Adjust the expiration time on our SSL session certificates to
  18847. better match SSL certs seen in the wild. Resolves ticket 4014.
  18848. - Allow nameservers with IPv6 address. Resolves bug 2574.
  18849. - Update to the October 4 2011 Maxmind GeoLite Country database.
  18850. Changes in version 0.2.3.5-alpha - 2011-09-28
  18851. Tor 0.2.3.5-alpha fixes two bugs that make it possible to enumerate
  18852. bridge relays; fixes an assertion error that many users started hitting
  18853. today; and adds the ability to refill token buckets more often than
  18854. once per second, allowing significant performance improvements.
  18855. o Security fixes:
  18856. - Bridge relays now do their directory fetches inside Tor TLS
  18857. connections, like all the other clients do, rather than connecting
  18858. directly to the DirPort like public relays do. Removes another
  18859. avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
  18860. - Bridges relays now build circuits for themselves in a more similar
  18861. way to how clients build them. Removes another avenue for
  18862. enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
  18863. when bridges were introduced.
  18864. o Major bugfixes:
  18865. - Fix an "Assertion md->held_by_node == 1 failed" error that could
  18866. occur when the same microdescriptor was referenced by two node_t
  18867. objects at once. Fix for bug 4118; bugfix on Tor 0.2.3.1-alpha.
  18868. o Major features (networking):
  18869. - Add a new TokenBucketRefillInterval option to refill token buckets
  18870. more frequently than once per second. This should improve network
  18871. performance, alleviate queueing problems, and make traffic less
  18872. bursty. Implements proposal 183; closes ticket 3630. Design by
  18873. Florian Tschorsch and Björn Scheuermann; implementation by
  18874. Florian Tschorsch.
  18875. o Minor bugfixes:
  18876. - Change an integer overflow check in the OpenBSD_Malloc code so
  18877. that GCC is less likely to eliminate it as impossible. Patch
  18878. from Mansour Moufid. Fixes bug 4059.
  18879. o Minor bugfixes (usability):
  18880. - Downgrade log messages about circuit timeout calibration from
  18881. "notice" to "info": they don't require or suggest any human
  18882. intervention. Patch from Tom Lowenthal. Fixes bug 4063;
  18883. bugfix on 0.2.2.14-alpha.
  18884. o Minor features (diagnostics):
  18885. - When the system call to create a listener socket fails, log the
  18886. error message explaining why. This may help diagnose bug 4027.
  18887. Changes in version 0.2.3.4-alpha - 2011-09-13
  18888. Tor 0.2.3.4-alpha includes the fixes from 0.2.2.33, including a slight
  18889. tweak to Tor's TLS handshake that makes relays and bridges that run
  18890. this new version reachable from Iran again. It also fixes a few new
  18891. bugs in 0.2.3.x, and teaches relays to recognize when they're not
  18892. listed in the network consensus and republish.
  18893. o Major bugfixes (also part of 0.2.2.33):
  18894. - Avoid an assertion failure when reloading a configuration with
  18895. TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
  18896. 3923; bugfix on 0.2.2.25-alpha.
  18897. o Minor features (security, also part of 0.2.2.33):
  18898. - Check for replays of the public-key encrypted portion of an
  18899. INTRODUCE1 cell, in addition to the current check for replays of
  18900. the g^x value. This prevents a possible class of active attacks
  18901. by an attacker who controls both an introduction point and a
  18902. rendezvous point, and who uses the malleability of AES-CTR to
  18903. alter the encrypted g^x portion of the INTRODUCE1 cell. We think
  18904. that these attacks are infeasible (requiring the attacker to send
  18905. on the order of zettabytes of altered cells in a short interval),
  18906. but we'd rather block them off in case there are any classes of
  18907. this attack that we missed. Reported by Willem Pinckaers.
  18908. o Minor features (also part of 0.2.2.33):
  18909. - Adjust the expiration time on our SSL session certificates to
  18910. better match SSL certs seen in the wild. Resolves ticket 4014.
  18911. - Change the default required uptime for a relay to be accepted as
  18912. a HSDir (hidden service directory) from 24 hours to 25 hours.
  18913. Improves on 0.2.0.10-alpha; resolves ticket 2649.
  18914. - Add a VoteOnHidServDirectoriesV2 config option to allow directory
  18915. authorities to abstain from voting on assignment of the HSDir
  18916. consensus flag. Related to bug 2649.
  18917. - Update to the September 6 2011 Maxmind GeoLite Country database.
  18918. o Minor bugfixes (also part of 0.2.2.33):
  18919. - Demote the 'replay detected' log message emitted when a hidden
  18920. service receives the same Diffie-Hellman public key in two different
  18921. INTRODUCE2 cells to info level. A normal Tor client can cause that
  18922. log message during its normal operation. Bugfix on 0.2.1.6-alpha;
  18923. fixes part of bug 2442.
  18924. - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
  18925. level. There is nothing that a hidden service's operator can do
  18926. to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
  18927. of bug 2442.
  18928. - Clarify a log message specifying the characters permitted in
  18929. HiddenServiceAuthorizeClient client names. Previously, the log
  18930. message said that "[A-Za-z0-9+-_]" were permitted; that could have
  18931. given the impression that every ASCII character between "+" and "_"
  18932. was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
  18933. o Build fixes (also part of 0.2.2.33):
  18934. - Clean up some code issues that prevented Tor from building on older
  18935. BSDs. Fixes bug 3894; reported by "grarpamp".
  18936. - Search for a platform-specific version of "ar" when cross-compiling.
  18937. Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
  18938. o Major bugfixes:
  18939. - Fix a bug where the SocksPort option (for example) would get
  18940. ignored and replaced by the default if a SocksListenAddress
  18941. option was set. Bugfix on 0.2.3.3-alpha; fixes bug 3936. Fix by
  18942. Fabian Keil.
  18943. o Major features:
  18944. - Relays now try regenerating and uploading their descriptor more
  18945. frequently if they are not listed in the consensus, or if the
  18946. version of their descriptor listed in the consensus is too
  18947. old. This fix should prevent situations where a server declines
  18948. to re-publish itself because it has done so too recently, even
  18949. though the authorities decided not to list its recent-enough
  18950. descriptor. Fix for bug 3327.
  18951. o Minor features:
  18952. - Relays now include a reason for regenerating their descriptors
  18953. in an HTTP header when uploading to the authorities. This will
  18954. make it easier to debug descriptor-upload issues in the future.
  18955. - When starting as root and then changing our UID via the User
  18956. control option, and we have a ControlSocket configured, make sure
  18957. that the ControlSocket is owned by the same account that Tor will
  18958. run under. Implements ticket 3421; fix by Jérémy Bobbio.
  18959. o Minor bugfixes:
  18960. - Abort if tor_vasprintf fails in connection_printf_to_buf (a
  18961. utility function used in the control-port code). This shouldn't
  18962. ever happen unless Tor is completely out of memory, but if it did
  18963. happen and Tor somehow recovered from it, Tor could have sent a log
  18964. message to a control port in the middle of a reply to a controller
  18965. command. Fixes part of bug 3428; bugfix on 0.1.2.3-alpha.
  18966. - Make 'FetchUselessDescriptors' cause all descriptor types and
  18967. all consensus types (including microdescriptors) to get fetched.
  18968. Fixes bug 3851; bugfix on 0.2.3.1-alpha.
  18969. o Code refactoring:
  18970. - Make a new "entry connection" struct as an internal subtype of "edge
  18971. connection", to simplify the code and make exit connections smaller.
  18972. Changes in version 0.2.2.33 - 2011-09-13
  18973. Tor 0.2.2.33 fixes several bugs, and includes a slight tweak to Tor's
  18974. TLS handshake that makes relays and bridges that run this new version
  18975. reachable from Iran again.
  18976. o Major bugfixes:
  18977. - Avoid an assertion failure when reloading a configuration with
  18978. TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
  18979. 3923; bugfix on 0.2.2.25-alpha.
  18980. o Minor features (security):
  18981. - Check for replays of the public-key encrypted portion of an
  18982. INTRODUCE1 cell, in addition to the current check for replays of
  18983. the g^x value. This prevents a possible class of active attacks
  18984. by an attacker who controls both an introduction point and a
  18985. rendezvous point, and who uses the malleability of AES-CTR to
  18986. alter the encrypted g^x portion of the INTRODUCE1 cell. We think
  18987. that these attacks are infeasible (requiring the attacker to send
  18988. on the order of zettabytes of altered cells in a short interval),
  18989. but we'd rather block them off in case there are any classes of
  18990. this attack that we missed. Reported by Willem Pinckaers.
  18991. o Minor features:
  18992. - Adjust the expiration time on our SSL session certificates to
  18993. better match SSL certs seen in the wild. Resolves ticket 4014.
  18994. - Change the default required uptime for a relay to be accepted as
  18995. a HSDir (hidden service directory) from 24 hours to 25 hours.
  18996. Improves on 0.2.0.10-alpha; resolves ticket 2649.
  18997. - Add a VoteOnHidServDirectoriesV2 config option to allow directory
  18998. authorities to abstain from voting on assignment of the HSDir
  18999. consensus flag. Related to bug 2649.
  19000. - Update to the September 6 2011 Maxmind GeoLite Country database.
  19001. o Minor bugfixes (documentation and log messages):
  19002. - Correct the man page to explain that HashedControlPassword and
  19003. CookieAuthentication can both be set, in which case either method
  19004. is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
  19005. when we decided to allow these config options to both be set. Issue
  19006. raised by bug 3898.
  19007. - Demote the 'replay detected' log message emitted when a hidden
  19008. service receives the same Diffie-Hellman public key in two different
  19009. INTRODUCE2 cells to info level. A normal Tor client can cause that
  19010. log message during its normal operation. Bugfix on 0.2.1.6-alpha;
  19011. fixes part of bug 2442.
  19012. - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
  19013. level. There is nothing that a hidden service's operator can do
  19014. to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
  19015. of bug 2442.
  19016. - Clarify a log message specifying the characters permitted in
  19017. HiddenServiceAuthorizeClient client names. Previously, the log
  19018. message said that "[A-Za-z0-9+-_]" were permitted; that could have
  19019. given the impression that every ASCII character between "+" and "_"
  19020. was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
  19021. o Build fixes:
  19022. - Provide a substitute implementation of lround() for MSVC, which
  19023. apparently lacks it. Patch from Gisle Vanem.
  19024. - Clean up some code issues that prevented Tor from building on older
  19025. BSDs. Fixes bug 3894; reported by "grarpamp".
  19026. - Search for a platform-specific version of "ar" when cross-compiling.
  19027. Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
  19028. Changes in version 0.2.3.3-alpha - 2011-09-01
  19029. Tor 0.2.3.3-alpha adds a new "stream isolation" feature to improve Tor's
  19030. security, and provides client-side support for the microdescriptor
  19031. and optimistic data features introduced earlier in the 0.2.3.x
  19032. series. It also includes numerous critical bugfixes in the (optional)
  19033. bufferevent-based networking backend.
  19034. o Major features (stream isolation):
  19035. - You can now configure Tor so that streams from different
  19036. applications are isolated on different circuits, to prevent an
  19037. attacker who sees your streams as they leave an exit node from
  19038. linking your sessions to one another. To do this, choose some way
  19039. to distinguish the applications: have them connect to different
  19040. SocksPorts, or have one of them use SOCKS4 while the other uses
  19041. SOCKS5, or have them pass different authentication strings to the
  19042. SOCKS proxy. Then, use the new SocksPort syntax to configure the
  19043. degree of isolation you need. This implements Proposal 171.
  19044. - There's a new syntax for specifying multiple client ports (such as
  19045. SOCKSPort, TransPort, DNSPort, NATDPort): you can now just declare
  19046. multiple *Port entries with full addr:port syntax on each.
  19047. The old *ListenAddress format is still supported, but you can't
  19048. mix it with the new *Port syntax.
  19049. o Major features (other):
  19050. - Enable microdescriptor fetching by default for clients. This allows
  19051. clients to download a much smaller amount of directory information.
  19052. To disable it (and go back to the old-style consensus and
  19053. descriptors), set "UseMicrodescriptors 0" in your torrc file.
  19054. - Tor's firewall-helper feature, introduced in 0.2.3.1-alpha (see the
  19055. "PortForwarding" config option), now supports Windows.
  19056. - When using an exit relay running 0.2.3.x, clients can now
  19057. "optimistically" send data before the exit relay reports that
  19058. the stream has opened. This saves a round trip when starting
  19059. connections where the client speaks first (such as web browsing).
  19060. This behavior is controlled by a consensus parameter (currently
  19061. disabled). To turn it on or off manually, use the "OptimisticData"
  19062. torrc option. Implements proposal 181; code by Ian Goldberg.
  19063. o Major bugfixes (bufferevents, fixes on 0.2.3.1-alpha):
  19064. - When using IOCP on Windows, we need to enable Libevent windows
  19065. threading support.
  19066. - The IOCP backend now works even when the user has not specified
  19067. the (internal, debugging-only) _UseFilteringSSLBufferevents option.
  19068. Fixes part of bug 3752.
  19069. - Correctly record the bytes we've read and written when using
  19070. bufferevents, so that we can include them in our bandwidth history
  19071. and advertised bandwidth. Fixes bug 3803.
  19072. - Apply rate-limiting only at the bottom of a chain of filtering
  19073. bufferevents. This prevents us from filling up internal read
  19074. buffers and violating rate-limits when filtering bufferevents
  19075. are enabled. Fixes part of bug 3804.
  19076. - Add high-watermarks to the output buffers for filtered
  19077. bufferevents. This prevents us from filling up internal write
  19078. buffers and wasting CPU cycles when filtering bufferevents are
  19079. enabled. Fixes part of bug 3804.
  19080. - Correctly notice when data has been written from a bufferevent
  19081. without flushing it completely. Fixes bug 3805.
  19082. - Fix a bug where server-side tunneled bufferevent-based directory
  19083. streams would get closed prematurely. Fixes bug 3814.
  19084. - Fix a use-after-free error with per-connection rate-limiting
  19085. buckets. Fixes bug 3888.
  19086. o Major bugfixes (also part of 0.2.2.31-rc):
  19087. - If we're configured to write our ControlPorts to disk, only write
  19088. them after switching UID and creating the data directory. This way,
  19089. we don't fail when starting up with a nonexistent DataDirectory
  19090. and a ControlPortWriteToFile setting based on that directory. Fixes
  19091. bug 3747; bugfix on Tor 0.2.2.26-beta.
  19092. o Minor features:
  19093. - Added a new CONF_CHANGED event so that controllers can be notified
  19094. of any configuration changes made by other controllers, or by the
  19095. user. Implements ticket 1692.
  19096. - Use evbuffer_copyout() in inspect_evbuffer(). This fixes a memory
  19097. leak when using bufferevents, and lets Libevent worry about how to
  19098. best copy data out of a buffer.
  19099. - Replace files in stats/ rather than appending to them. Now that we
  19100. include statistics in extra-info descriptors, it makes no sense to
  19101. keep old statistics forever. Implements ticket 2930.
  19102. o Minor features (build compatibility):
  19103. - Limited, experimental support for building with nmake and MSVC.
  19104. - Provide a substitute implementation of lround() for MSVC, which
  19105. apparently lacks it. Patch from Gisle Vanem.
  19106. o Minor features (also part of 0.2.2.31-rc):
  19107. - Update to the August 2 2011 Maxmind GeoLite Country database.
  19108. o Minor bugfixes (on 0.2.3.x-alpha):
  19109. - Fix a spurious warning when parsing SOCKS requests with
  19110. bufferevents enabled. Fixes bug 3615; bugfix on 0.2.3.2-alpha.
  19111. - Get rid of a harmless warning that could happen on relays running
  19112. with bufferevents. The warning was caused by someone doing an http
  19113. request to a relay's orport. Also don't warn for a few related
  19114. non-errors. Fixes bug 3700; bugfix on 0.2.3.1-alpha.
  19115. o Minor bugfixes (on 2.2.x and earlier):
  19116. - Correct the man page to explain that HashedControlPassword and
  19117. CookieAuthentication can both be set, in which case either method
  19118. is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
  19119. when we decided to allow these config options to both be set. Issue
  19120. raised by bug 3898.
  19121. - The "--quiet" and "--hush" options now apply not only to Tor's
  19122. behavior before logs are configured, but also to Tor's behavior in
  19123. the absence of configured logs. Fixes bug 3550; bugfix on
  19124. 0.2.0.10-alpha.
  19125. o Minor bugfixes (also part of 0.2.2.31-rc):
  19126. - Write several files in text mode, on OSes that distinguish text
  19127. mode from binary mode (namely, Windows). These files are:
  19128. 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
  19129. that collect those statistics; 'client_keys' and 'hostname' for
  19130. hidden services that use authentication; and (in the tor-gencert
  19131. utility) newly generated identity and signing keys. Previously,
  19132. we wouldn't specify text mode or binary mode, leading to an
  19133. assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
  19134. the DirRecordUsageByCountry option which would have triggered
  19135. the assertion failure was added), although this assertion failure
  19136. would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
  19137. - Selectively disable deprecation warnings on OS X because Lion
  19138. started deprecating the shipped copy of openssl. Fixes bug 3643.
  19139. - Remove an extra pair of quotation marks around the error
  19140. message in control-port STATUS_GENERAL BUG events. Bugfix on
  19141. 0.1.2.6-alpha; fixes bug 3732.
  19142. - When unable to format an address as a string, report its value
  19143. as "???" rather than reusing the last formatted address. Bugfix
  19144. on 0.2.1.5-alpha.
  19145. o Code simplifications and refactoring:
  19146. - Rewrite the listener-selection logic so that parsing which ports
  19147. we want to listen on is now separate from binding to the ports
  19148. we want.
  19149. o Build changes:
  19150. - Building Tor with bufferevent support now requires Libevent
  19151. 2.0.13-stable or later. Previous versions of Libevent had bugs in
  19152. SSL-related bufferevents and related issues that would make Tor
  19153. work badly with bufferevents. Requiring 2.0.13-stable also allows
  19154. Tor with bufferevents to take advantage of Libevent APIs
  19155. introduced after 2.0.8-rc.
  19156. Changes in version 0.2.2.32 - 2011-08-27
  19157. The Tor 0.2.2 release series is dedicated to the memory of Andreas
  19158. Pfitzmann (1958-2010), a pioneer in anonymity and privacy research,
  19159. a founder of the PETS community, a leader in our field, a mentor,
  19160. and a friend. He left us with these words: "I had the possibility
  19161. to contribute to this world that is not as it should be. I hope I
  19162. could help in some areas to make the world a better place, and that
  19163. I could also encourage other people to be engaged in improving the
  19164. world. Please, stay engaged. This world needs you, your love, your
  19165. initiative -- now I cannot be part of that anymore."
  19166. Tor 0.2.2.32, the first stable release in the 0.2.2 branch, is finally
  19167. ready. More than two years in the making, this release features improved
  19168. client performance and hidden service reliability, better compatibility
  19169. for Android, correct behavior for bridges that listen on more than
  19170. one address, more extensible and flexible directory object handling,
  19171. better reporting of network statistics, improved code security, and
  19172. many many other features and bugfixes.
  19173. Changes in version 0.2.2.31-rc - 2011-08-17
  19174. Tor 0.2.2.31-rc is the second and hopefully final release candidate
  19175. for the Tor 0.2.2.x series.
  19176. o Major bugfixes:
  19177. - Remove an extra pair of quotation marks around the error
  19178. message in control-port STATUS_GENERAL BUG events. Bugfix on
  19179. 0.1.2.6-alpha; fixes bug 3732.
  19180. - If we're configured to write our ControlPorts to disk, only write
  19181. them after switching UID and creating the data directory. This way,
  19182. we don't fail when starting up with a nonexistent DataDirectory
  19183. and a ControlPortWriteToFile setting based on that directory. Fixes
  19184. bug 3747; bugfix on Tor 0.2.2.26-beta.
  19185. o Minor features:
  19186. - Update to the August 2 2011 Maxmind GeoLite Country database.
  19187. o Minor bugfixes:
  19188. - Allow GETINFO fingerprint to return a fingerprint even when
  19189. we have not yet built a router descriptor. Fixes bug 3577;
  19190. bugfix on 0.2.0.1-alpha.
  19191. - Write several files in text mode, on OSes that distinguish text
  19192. mode from binary mode (namely, Windows). These files are:
  19193. 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
  19194. that collect those statistics; 'client_keys' and 'hostname' for
  19195. hidden services that use authentication; and (in the tor-gencert
  19196. utility) newly generated identity and signing keys. Previously,
  19197. we wouldn't specify text mode or binary mode, leading to an
  19198. assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
  19199. the DirRecordUsageByCountry option which would have triggered
  19200. the assertion failure was added), although this assertion failure
  19201. would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
  19202. - Selectively disable deprecation warnings on OS X because Lion
  19203. started deprecating the shipped copy of openssl. Fixes bug 3643.
  19204. - When unable to format an address as a string, report its value
  19205. as "???" rather than reusing the last formatted address. Bugfix
  19206. on 0.2.1.5-alpha.
  19207. Changes in version 0.2.3.2-alpha - 2011-07-18
  19208. Tor 0.2.3.2-alpha introduces two new experimental features:
  19209. microdescriptors and pluggable transports. It also continues cleaning
  19210. up a variety of recently introduced features.
  19211. o Major features:
  19212. - Clients can now use microdescriptors instead of regular descriptors
  19213. to build circuits. Microdescriptors are authority-generated
  19214. summaries of regular descriptors' contents, designed to change
  19215. very rarely (see proposal 158 for details). This feature is
  19216. designed to save bandwidth, especially for clients on slow internet
  19217. connections. It's off by default for now, since nearly no caches
  19218. support it, but it will be on-by-default for clients in a future
  19219. version. You can use the UseMicrodescriptors option to turn it on.
  19220. - Tor clients using bridges can now be configured to use a separate
  19221. 'transport' proxy for each bridge. This approach helps to resist
  19222. censorship by allowing bridges to use protocol obfuscation
  19223. plugins. It implements part of proposal 180. Implements ticket 2841.
  19224. - While we're trying to bootstrap, record how many TLS connections
  19225. fail in each state, and report which states saw the most failures
  19226. in response to any bootstrap failures. This feature may speed up
  19227. diagnosis of censorship events. Implements ticket 3116.
  19228. o Major bugfixes (on 0.2.3.1-alpha):
  19229. - When configuring a large set of nodes in EntryNodes (as with
  19230. 'EntryNodes {cc}' or 'EntryNodes 1.1.1.1/16'), choose only a
  19231. random subset to be guards, and choose them in random
  19232. order. Fixes bug 2798.
  19233. - Tor could crash when remembering a consensus in a non-used consensus
  19234. flavor without having a current consensus set. Fixes bug 3361.
  19235. - Comparing an unknown address to a microdescriptor's shortened exit
  19236. policy would always give a "rejected" result. Fixes bug 3599.
  19237. - Using microdescriptors as a client no longer prevents Tor from
  19238. uploading and downloading hidden service descriptors. Fixes
  19239. bug 3601.
  19240. o Minor features:
  19241. - Allow nameservers with IPv6 address. Resolves bug 2574.
  19242. - Accept attempts to include a password authenticator in the
  19243. handshake, as supported by SOCKS5. This handles SOCKS clients that
  19244. don't know how to omit a password when authenticating. Resolves
  19245. bug 1666.
  19246. - When configuring a large set of nodes in EntryNodes, and there are
  19247. enough of them listed as Guard so that we don't need to consider
  19248. the non-guard entries, prefer the ones listed with the Guard flag.
  19249. - Check for and recover from inconsistency in the microdescriptor
  19250. cache. This will make it harder for us to accidentally free a
  19251. microdescriptor without removing it from the appropriate data
  19252. structures. Fixes issue 3135; issue noted by "wanoskarnet".
  19253. - Log SSL state transitions at log level DEBUG, log domain
  19254. HANDSHAKE. This can be useful for debugging censorship events.
  19255. Implements ticket 3264.
  19256. - Add port 6523 (Gobby) to LongLivedPorts. Patch by intrigeri;
  19257. implements ticket 3439.
  19258. o Minor bugfixes (on 0.2.3.1-alpha):
  19259. - Do not free all general-purpose regular descriptors just
  19260. because microdescriptor use is enabled. Fixes bug 3113.
  19261. - Correctly link libevent_openssl when --enable-static-libevent
  19262. is passed to configure. Fixes bug 3118.
  19263. - Bridges should not complain during their heartbeat log messages that
  19264. they are unlisted in the consensus: that's more or less the point
  19265. of being a bridge. Fixes bug 3183.
  19266. - Report a SIGNAL event to controllers when acting on a delayed
  19267. SIGNAL NEWNYM command. Previously, we would report a SIGNAL
  19268. event to the controller if we acted on a SIGNAL NEWNYM command
  19269. immediately, and otherwise not report a SIGNAL event for the
  19270. command at all. Fixes bug 3349.
  19271. - Fix a crash when handling the SIGNAL controller command or
  19272. reporting ERR-level status events with bufferevents enabled. Found
  19273. by Robert Ransom. Fixes bug 3367.
  19274. - Always ship the tor-fw-helper manpage in our release tarballs.
  19275. Fixes bug 3389. Reported by Stephen Walker.
  19276. - Fix a class of double-mark-for-close bugs when bufferevents
  19277. are enabled. Fixes bug 3403.
  19278. - Update tor-fw-helper to support libnatpmp-20110618. Fixes bug 3434.
  19279. - Add SIGNAL to the list returned by the 'GETINFO events/names'
  19280. control-port command. Fixes part of bug 3465.
  19281. - Prevent using negative indices during unit test runs when read_all()
  19282. fails. Spotted by coverity.
  19283. - Fix a rare memory leak when checking the nodelist without it being
  19284. present. Found by coverity.
  19285. - Only try to download a microdescriptor-flavored consensus from
  19286. a directory cache that provides them.
  19287. o Minor bugfixes (on 0.2.2.x and earlier):
  19288. - Assert that hidden-service-related operations are not performed
  19289. using single-hop circuits. Previously, Tor would assert that
  19290. client-side streams are not attached to single-hop circuits,
  19291. but not that other sensitive operations on the client and service
  19292. side are not performed using single-hop circuits. Fixes bug 3332;
  19293. bugfix on 0.0.6.
  19294. - Don't publish a new relay descriptor when we reload our onion key,
  19295. unless the onion key has actually changed. Fixes bug 3263 and
  19296. resolves another cause of bug 1810. Bugfix on 0.1.1.11-alpha.
  19297. - Allow GETINFO fingerprint to return a fingerprint even when
  19298. we have not yet built a router descriptor. Fixes bug 3577;
  19299. bugfix on 0.2.0.1-alpha.
  19300. - Make 'tor --digests' list hashes of all Tor source files. Bugfix
  19301. on 0.2.2.4-alpha; fixes bug 3427.
  19302. o Code simplification and refactoring:
  19303. - Use tor_sscanf() in place of scanf() in more places through the
  19304. code. This makes us a little more locale-independent, and
  19305. should help shut up code-analysis tools that can't tell
  19306. a safe sscanf string from a dangerous one.
  19307. - Use tt_assert(), not tor_assert(), for checking for test failures.
  19308. This makes the unit tests more able to go on in the event that
  19309. one of them fails.
  19310. - Split connection_about_to_close() into separate functions for each
  19311. connection type.
  19312. o Build changes:
  19313. - On Windows, we now define the _WIN32_WINNT macros only if they
  19314. are not already defined. This lets the person building Tor decide,
  19315. if they want, to require a later version of Windows.
  19316. Changes in version 0.2.2.30-rc - 2011-07-07
  19317. Tor 0.2.2.30-rc is the first release candidate for the Tor 0.2.2.x
  19318. series. It fixes a few smaller bugs, but generally appears stable.
  19319. Please test it and let us know whether it is!
  19320. o Minor bugfixes:
  19321. - Send a SUCCEEDED stream event to the controller when a reverse
  19322. resolve succeeded. Fixes bug 3536; bugfix on 0.0.8pre1. Issue
  19323. discovered by katmagic.
  19324. - Always NUL-terminate the sun_path field of a sockaddr_un before
  19325. passing it to the kernel. (Not a security issue: kernels are
  19326. smart enough to reject bad sockaddr_uns.) Found by Coverity;
  19327. CID #428. Bugfix on Tor 0.2.0.3-alpha.
  19328. - Don't stack-allocate the list of supplementary GIDs when we're
  19329. about to log them. Stack-allocating NGROUPS_MAX gid_t elements
  19330. could take up to 256K, which is way too much stack. Found by
  19331. Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
  19332. - Add BUILDTIMEOUT_SET to the list returned by the 'GETINFO
  19333. events/names' control-port command. Bugfix on 0.2.2.9-alpha;
  19334. fixes part of bug 3465.
  19335. - Fix a memory leak when receiving a descriptor for a hidden
  19336. service we didn't ask for. Found by Coverity; CID #30. Bugfix
  19337. on 0.2.2.26-beta.
  19338. o Minor features:
  19339. - Update to the July 1 2011 Maxmind GeoLite Country database.
  19340. Changes in version 0.2.2.29-beta - 2011-06-20
  19341. Tor 0.2.2.29-beta reverts an accidental behavior change for users who
  19342. have bridge lines in their torrc but don't want to use them; gets
  19343. us closer to having the control socket feature working on Debian;
  19344. and fixes a variety of smaller bugs.
  19345. o Major bugfixes:
  19346. - Revert the UseBridges option to its behavior before 0.2.2.28-beta.
  19347. When we changed the default behavior to "use bridges if any
  19348. are listed in the torrc", we surprised users who had bridges
  19349. in their torrc files but who didn't actually want to use them.
  19350. Partial resolution for bug 3354.
  19351. o Privacy fixes:
  19352. - Don't attach new streams to old rendezvous circuits after SIGNAL
  19353. NEWNYM. Previously, we would keep using an existing rendezvous
  19354. circuit if it remained open (i.e. if it were kept open by a
  19355. long-lived stream, or if a new stream were attached to it before
  19356. Tor could notice that it was old and no longer in use). Bugfix on
  19357. 0.1.1.15-rc; fixes bug 3375.
  19358. o Minor bugfixes:
  19359. - Fix a bug when using ControlSocketsGroupWritable with User. The
  19360. directory's group would be checked against the current group, not
  19361. the configured group. Patch by Jérémy Bobbio. Fixes bug 3393;
  19362. bugfix on 0.2.2.26-beta.
  19363. - Make connection_printf_to_buf()'s behavior sane. Its callers
  19364. expect it to emit a CRLF iff the format string ends with CRLF;
  19365. it actually emitted a CRLF iff (a) the format string ended with
  19366. CRLF or (b) the resulting string was over 1023 characters long or
  19367. (c) the format string did not end with CRLF *and* the resulting
  19368. string was 1021 characters long or longer. Bugfix on 0.1.1.9-alpha;
  19369. fixes part of bug 3407.
  19370. - Make send_control_event_impl()'s behavior sane. Its callers
  19371. expect it to always emit a CRLF at the end of the string; it
  19372. might have emitted extra control characters as well. Bugfix on
  19373. 0.1.1.9-alpha; fixes another part of bug 3407.
  19374. - Make crypto_rand_int() check the value of its input correctly.
  19375. Previously, it accepted values up to UINT_MAX, but could return a
  19376. negative number if given a value above INT_MAX+1. Found by George
  19377. Kadianakis. Fixes bug 3306; bugfix on 0.2.2pre14.
  19378. - Avoid a segfault when reading a malformed circuit build state
  19379. with more than INT_MAX entries. Found by wanoskarnet. Bugfix on
  19380. 0.2.2.4-alpha.
  19381. - When asked about a DNS record type we don't support via a
  19382. client DNSPort, reply with NOTIMPL rather than an empty
  19383. reply. Patch by intrigeri. Fixes bug 3369; bugfix on 2.0.1-alpha.
  19384. - Fix a rare memory leak during stats writing. Found by coverity.
  19385. o Minor features:
  19386. - Update to the June 1 2011 Maxmind GeoLite Country database.
  19387. o Code simplifications and refactoring:
  19388. - Remove some dead code as indicated by coverity.
  19389. - Remove a few dead assignments during router parsing. Found by
  19390. coverity.
  19391. - Add some forgotten return value checks during unit tests. Found
  19392. by coverity.
  19393. - Don't use 1-bit wide signed bit fields. Found by coverity.
  19394. Changes in version 0.2.2.28-beta - 2011-06-04
  19395. Tor 0.2.2.28-beta makes great progress towards a new stable release: we
  19396. fixed a big bug in whether relays stay in the consensus consistently,
  19397. we moved closer to handling bridges and hidden services correctly,
  19398. and we started the process of better handling the dreaded "my Vidalia
  19399. died, and now my Tor demands a password when I try to reconnect to it"
  19400. usability issue.
  19401. o Major bugfixes:
  19402. - Don't decide to make a new descriptor when receiving a HUP signal.
  19403. This bug has caused a lot of 0.2.2.x relays to disappear from the
  19404. consensus periodically. Fixes the most common case of triggering
  19405. bug 1810; bugfix on 0.2.2.7-alpha.
  19406. - Actually allow nameservers with IPv6 addresses. Fixes bug 2574.
  19407. - Don't try to build descriptors if "ORPort auto" is set and we
  19408. don't know our actual ORPort yet. Fix for bug 3216; bugfix on
  19409. 0.2.2.26-beta.
  19410. - Resolve a crash that occurred when setting BridgeRelay to 1 with
  19411. accounting enabled. Fixes bug 3228; bugfix on 0.2.2.18-alpha.
  19412. - Apply circuit timeouts to opened hidden-service-related circuits
  19413. based on the correct start time. Previously, we would apply the
  19414. circuit build timeout based on time since the circuit's creation;
  19415. it was supposed to be applied based on time since the circuit
  19416. entered its current state. Bugfix on 0.0.6; fixes part of bug 1297.
  19417. - Use the same circuit timeout for client-side introduction
  19418. circuits as for other four-hop circuits, rather than the timeout
  19419. for single-hop directory-fetch circuits; the shorter timeout may
  19420. have been appropriate with the static circuit build timeout in
  19421. 0.2.1.x and earlier, but caused many hidden service access attempts
  19422. to fail with the adaptive CBT introduced in 0.2.2.2-alpha. Bugfix
  19423. on 0.2.2.2-alpha; fixes another part of bug 1297.
  19424. - In ticket 2511 we fixed a case where you could use an unconfigured
  19425. bridge if you had configured it as a bridge the last time you ran
  19426. Tor. Now fix another edge case: if you had configured it as a bridge
  19427. but then switched to a different bridge via the controller, you
  19428. would still be willing to use the old one. Bugfix on 0.2.0.1-alpha;
  19429. fixes bug 3321.
  19430. o Major features:
  19431. - Add an __OwningControllerProcess configuration option and a
  19432. TAKEOWNERSHIP control-port command. Now a Tor controller can ensure
  19433. that when it exits, Tor will shut down. Implements feature 3049.
  19434. - If "UseBridges 1" is set and no bridges are configured, Tor will
  19435. now refuse to build any circuits until some bridges are set.
  19436. If "UseBridges auto" is set, Tor will use bridges if they are
  19437. configured and we are not running as a server, but otherwise will
  19438. make circuits as usual. The new default is "auto". Patch by anonym,
  19439. so the Tails LiveCD can stop automatically revealing you as a Tor
  19440. user on startup.
  19441. o Minor bugfixes:
  19442. - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
  19443. - Remove a trailing asterisk from "exit-policy/default" in the
  19444. output of the control port command "GETINFO info/names". Bugfix
  19445. on 0.1.2.5-alpha.
  19446. - Use a wide type to hold sockets when built for 64-bit Windows builds.
  19447. Fixes bug 3270.
  19448. - Warn when the user configures two HiddenServiceDir lines that point
  19449. to the same directory. Bugfix on 0.0.6 (the version introducing
  19450. HiddenServiceDir); fixes bug 3289.
  19451. - Remove dead code from rend_cache_lookup_v2_desc_as_dir. Fixes
  19452. part of bug 2748; bugfix on 0.2.0.10-alpha.
  19453. - Log malformed requests for rendezvous descriptors as protocol
  19454. warnings, not warnings. Also, use a more informative log message
  19455. in case someone sees it at log level warning without prior
  19456. info-level messages. Fixes the other part of bug 2748; bugfix
  19457. on 0.2.0.10-alpha.
  19458. - Clear the table recording the time of the last request for each
  19459. hidden service descriptor from each HS directory on SIGNAL NEWNYM.
  19460. Previously, we would clear our HS descriptor cache on SIGNAL
  19461. NEWNYM, but if we had previously retrieved a descriptor (or tried
  19462. to) from every directory responsible for it, we would refuse to
  19463. fetch it again for up to 15 minutes. Bugfix on 0.2.2.25-alpha;
  19464. fixes bug 3309.
  19465. - Fix a log message that said "bits" while displaying a value in
  19466. bytes. Found by wanoskarnet. Fixes bug 3318; bugfix on
  19467. 0.2.0.1-alpha.
  19468. - When checking for 1024-bit keys, check for 1024 bits, not 128
  19469. bytes. This allows Tor to correctly discard keys of length 1017
  19470. through 1023. Bugfix on 0.0.9pre5.
  19471. o Minor features:
  19472. - Relays now log the reason for publishing a new relay descriptor,
  19473. so we have a better chance of hunting down instances of bug 1810.
  19474. Resolves ticket 3252.
  19475. - Revise most log messages that refer to nodes by nickname to
  19476. instead use the "$key=nickname at address" format. This should be
  19477. more useful, especially since nicknames are less and less likely
  19478. to be unique. Resolves ticket 3045.
  19479. - Log (at info level) when purging pieces of hidden-service-client
  19480. state because of SIGNAL NEWNYM.
  19481. o Removed options:
  19482. - Remove undocumented option "-F" from tor-resolve: it hasn't done
  19483. anything since 0.2.1.16-rc.
  19484. Changes in version 0.2.2.27-beta - 2011-05-18
  19485. Tor 0.2.2.27-beta fixes a bridge-related stability bug in the previous
  19486. release, and also adds a few more general bugfixes.
  19487. o Major bugfixes:
  19488. - Fix a crash bug when changing bridges in a running Tor process.
  19489. Fixes bug 3213; bugfix on 0.2.2.26-beta.
  19490. - When the controller configures a new bridge, don't wait 10 to 60
  19491. seconds before trying to fetch its descriptor. Bugfix on
  19492. 0.2.0.3-alpha; fixes bug 3198 (suggested by 2355).
  19493. o Minor bugfixes:
  19494. - Require that onion keys have exponent 65537 in microdescriptors too.
  19495. Fixes more of bug 3207; bugfix on 0.2.2.26-beta.
  19496. - Tor used to limit HttpProxyAuthenticator values to 48 characters.
  19497. Changed the limit to 512 characters by removing base64 newlines.
  19498. Fixes bug 2752. Fix by Michael Yakubovich.
  19499. - When a client starts or stops using bridges, never use a circuit
  19500. that was built before the configuration change. This behavior could
  19501. put at risk a user who uses bridges to ensure that her traffic
  19502. only goes to the chosen addresses. Bugfix on 0.2.0.3-alpha; fixes
  19503. bug 3200.
  19504. Changes in version 0.2.2.26-beta - 2011-05-17
  19505. Tor 0.2.2.26-beta fixes a variety of potential privacy problems. It
  19506. also introduces a new "socksport auto" approach that should make it
  19507. easier to run multiple Tors on the same system, and does a lot of
  19508. cleanup to get us closer to a release candidate.
  19509. o Security/privacy fixes:
  19510. - Replace all potentially sensitive memory comparison operations
  19511. with versions whose runtime does not depend on the data being
  19512. compared. This will help resist a class of attacks where an
  19513. adversary can use variations in timing information to learn
  19514. sensitive data. Fix for one case of bug 3122. (Safe memcmp
  19515. implementation by Robert Ransom based partially on code by DJB.)
  19516. - When receiving a hidden service descriptor, check that it is for
  19517. the hidden service we wanted. Previously, Tor would store any
  19518. hidden service descriptors that a directory gave it, whether it
  19519. wanted them or not. This wouldn't have let an attacker impersonate
  19520. a hidden service, but it did let directories pre-seed a client
  19521. with descriptors that it didn't want. Bugfix on 0.0.6.
  19522. - On SIGHUP, do not clear out all TrackHostExits mappings, client
  19523. DNS cache entries, and virtual address mappings: that's what
  19524. NEWNYM is for. Fixes bug 1345; bugfix on 0.1.0.1-rc.
  19525. o Major features:
  19526. - The options SocksPort, ControlPort, and so on now all accept a
  19527. value "auto" that opens a socket on an OS-selected port. A
  19528. new ControlPortWriteToFile option tells Tor to write its
  19529. actual control port or ports to a chosen file. If the option
  19530. ControlPortFileGroupReadable is set, the file is created as
  19531. group-readable. Now users can run two Tor clients on the same
  19532. system without needing to manually mess with parameters. Resolves
  19533. part of ticket 3076.
  19534. - Set SO_REUSEADDR on all sockets, not just listeners. This should
  19535. help busy exit nodes avoid running out of useable ports just
  19536. because all the ports have been used in the near past. Resolves
  19537. issue 2850.
  19538. o Minor features:
  19539. - New "GETINFO net/listeners/(type)" controller command to return
  19540. a list of addresses and ports that are bound for listeners for a
  19541. given connection type. This is useful when the user has configured
  19542. "SocksPort auto" and the controller needs to know which port got
  19543. chosen. Resolves another part of ticket 3076.
  19544. - Add a new ControlSocketsGroupWritable configuration option: when
  19545. it is turned on, ControlSockets are group-writeable by the default
  19546. group of the current user. Patch by Jérémy Bobbio; implements
  19547. ticket 2972.
  19548. - Tor now refuses to create a ControlSocket in a directory that is
  19549. world-readable (or group-readable if ControlSocketsGroupWritable
  19550. is 0). This is necessary because some operating systems do not
  19551. enforce permissions on an AF_UNIX sockets. Permissions on the
  19552. directory holding the socket, however, seems to work everywhere.
  19553. - Rate-limit a warning about failures to download v2 networkstatus
  19554. documents. Resolves part of bug 1352.
  19555. - Backport code from 0.2.3.x that allows directory authorities to
  19556. clean their microdescriptor caches. Needed to resolve bug 2230.
  19557. - When an HTTPS proxy reports "403 Forbidden", we now explain
  19558. what it means rather than calling it an unexpected status code.
  19559. Closes bug 2503. Patch from Michael Yakubovich.
  19560. - Update to the May 1 2011 Maxmind GeoLite Country database.
  19561. o Minor bugfixes:
  19562. - Authorities now clean their microdesc cache periodically and when
  19563. reading from disk initially, not only when adding new descriptors.
  19564. This prevents a bug where we could lose microdescriptors. Bugfix
  19565. on 0.2.2.6-alpha. Fixes bug 2230.
  19566. - Do not crash when our configuration file becomes unreadable, for
  19567. example due to a permissions change, between when we start up
  19568. and when a controller calls SAVECONF. Fixes bug 3135; bugfix
  19569. on 0.0.9pre6.
  19570. - Avoid a bug that would keep us from replacing a microdescriptor
  19571. cache on Windows. (We would try to replace the file while still
  19572. holding it open. That's fine on Unix, but Windows doesn't let us
  19573. do that.) Bugfix on 0.2.2.6-alpha; bug found by wanoskarnet.
  19574. - Add missing explanations for the authority-related torrc options
  19575. RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey in the
  19576. man page. Resolves issue 2379.
  19577. - As an authority, do not upload our own vote or signature set to
  19578. ourself. It would tell us nothing new, and as of 0.2.2.24-alpha,
  19579. it would get flagged as a duplicate. Resolves bug 3026.
  19580. - Accept hidden service descriptors if we think we might be a hidden
  19581. service directory, regardless of what our consensus says. This
  19582. helps robustness, since clients and hidden services can sometimes
  19583. have a more up-to-date view of the network consensus than we do,
  19584. and if they think that the directory authorities list us a HSDir,
  19585. we might actually be one. Related to bug 2732; bugfix on
  19586. 0.2.0.10-alpha.
  19587. - When a controller changes TrackHostExits, remove mappings for
  19588. hosts that should no longer have their exits tracked. Bugfix on
  19589. 0.1.0.1-rc.
  19590. - When a controller changes VirtualAddrNetwork, remove any mappings
  19591. for hosts that were automapped to the old network. Bugfix on
  19592. 0.1.1.19-rc.
  19593. - When a controller changes one of the AutomapHosts* options, remove
  19594. any mappings for hosts that should no longer be automapped. Bugfix
  19595. on 0.2.0.1-alpha.
  19596. - Do not reset the bridge descriptor download status every time we
  19597. re-parse our configuration or get a configuration change. Fixes
  19598. bug 3019; bugfix on 0.2.0.3-alpha.
  19599. o Minor bugfixes (code cleanup):
  19600. - When loading the microdesc journal, remember its current size.
  19601. In 0.2.2, this helps prevent the microdesc journal from growing
  19602. without limit on authorities (who are the only ones to use it in
  19603. 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
  19604. Fix posted by "cypherpunks."
  19605. - The microdesc journal is supposed to get rebuilt only if it is
  19606. at least _half_ the length of the store, not _twice_ the length
  19607. of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
  19608. - Fix a potential null-pointer dereference while computing a
  19609. consensus. Bugfix on 0.2.0.3-alpha, found with the help of
  19610. clang's analyzer.
  19611. - Avoid a possible null-pointer dereference when rebuilding the mdesc
  19612. cache without actually having any descriptors to cache. Bugfix on
  19613. 0.2.2.6-alpha. Issue discovered using clang's static analyzer.
  19614. - If we fail to compute the identity digest of a v3 legacy keypair,
  19615. warn, and don't use a buffer-full of junk instead. Bugfix on
  19616. 0.2.1.1-alpha; fixes bug 3106.
  19617. - Resolve an untriggerable issue in smartlist_string_num_isin(),
  19618. where if the function had ever in the future been used to check
  19619. for the presence of a too-large number, it would have given an
  19620. incorrect result. (Fortunately, we only used it for 16-bit
  19621. values.) Fixes bug 3175; bugfix on 0.1.0.1-rc.
  19622. - Require that introduction point keys and onion handshake keys
  19623. have a public exponent of 65537. Starts to fix bug 3207; bugfix
  19624. on 0.2.0.10-alpha.
  19625. o Removed features:
  19626. - Caches no longer download and serve v2 networkstatus documents
  19627. unless FetchV2Networkstatus flag is set: these documents haven't
  19628. haven't been used by clients or relays since 0.2.0.x. Resolves
  19629. bug 3022.
  19630. Changes in version 0.2.3.1-alpha - 2011-05-05
  19631. Tor 0.2.3.1-alpha adds some new experimental features, including support
  19632. for an improved network IO backend, IOCP networking on Windows,
  19633. microdescriptor caching, "fast-start" support for streams, and automatic
  19634. home router configuration. There are also numerous internal improvements
  19635. to try to make the code easier for developers to work with.
  19636. This is the first alpha release in a new series, so expect there to be
  19637. bugs. Users who would rather test out a more stable branch should
  19638. stay with 0.2.2.x for now.
  19639. o Major features:
  19640. - Tor can now optionally build with the "bufferevents" buffered IO
  19641. backend provided by Libevent 2. To use this feature, make sure you
  19642. have the latest possible version of Libevent, and pass the
  19643. --enable-bufferevents flag to configure when building Tor from
  19644. source. This feature will make our networking code more flexible,
  19645. let us stack layers on each other, and let us use more efficient
  19646. zero-copy transports where available.
  19647. - As an experimental feature, Tor can use IOCP for networking on Windows.
  19648. Once this code is tuned and optimized, it promises much better
  19649. performance than the select-based backend we've used in the past. To
  19650. try this feature, you must build Tor with Libevent 2, configure Tor
  19651. with the "bufferevents" buffered IO backend, and add "DisableIOCP 0" to
  19652. your torrc. There are known bugs here: only try this if you can help
  19653. debug it as it breaks.
  19654. - The EntryNodes option can now include country codes like {de} or IP
  19655. addresses or network masks. Previously we had disallowed these options
  19656. because we didn't have an efficient way to keep the list up to
  19657. date. Fixes bug 1982, but see bug 2798 for an unresolved issue here.
  19658. - Exit nodes now accept and queue data on not-yet-connected streams.
  19659. Previously, the client wasn't allowed to send data until the stream was
  19660. connected, which slowed down all connections. This change will enable
  19661. clients to perform a "fast-start" on streams and send data without
  19662. having to wait for a confirmation that the stream has opened. (Patch
  19663. from Ian Goldberg; implements the server side of Proposal 174.)
  19664. - Tor now has initial support for automatic port mapping on the many
  19665. home routers that support NAT-PMP or UPnP. (Not yet supported on
  19666. Windows). To build the support code, you'll need to have libnatpnp
  19667. library and/or the libminiupnpc library, and you'll need to enable the
  19668. feature specifically by passing "--enable-upnp" and/or
  19669. "--enable-natpnp" to configure. To turn it on, use the new
  19670. PortForwarding option.
  19671. - Caches now download, cache, and serve multiple "flavors" of the
  19672. consensus, including a flavor that describes microdescriptors.
  19673. - Caches now download, cache, and serve microdescriptors -- small
  19674. summaries of router descriptors that are authenticated by all of the
  19675. directory authorities. Once enough caches are running this code,
  19676. clients will be able to save significant amounts of directory bandwidth
  19677. by downloading microdescriptors instead of router descriptors.
  19678. o Minor features:
  19679. - Make logging resolution configurable with a new LogTimeGranularity
  19680. option, and change the default from 1 millisecond to 1 second.
  19681. Implements enhancement 1668.
  19682. - We log which torrc file we're using on startup. Implements ticket
  19683. 2444.
  19684. - Ordinarily, Tor does not count traffic from private addresses (like
  19685. 127.0.0.1 or 10.0.0.1) when calculating rate limits or accounting.
  19686. There is now a new option, CountPrivateBandwidth, to disable this
  19687. behavior. Patch from Daniel Cagara.
  19688. - New --enable-static-tor configure option for building Tor as
  19689. statically as possible. Idea, general hackery and thoughts from
  19690. Alexei Czeskis, John Gilmore, Jacob Appelbaum. Implements ticket
  19691. 2702.
  19692. - If you set the NumCPUs option to 0, Tor will now try to detect how
  19693. many CPUs you have. This is the new default behavior.
  19694. - Turn on directory request statistics by default and include them in
  19695. extra-info descriptors. Don't break if we have no GeoIP database.
  19696. - Relays that set "ConnDirectionStatistics 1" write statistics on the
  19697. bidirectional use of connections to disk every 24 hours.
  19698. - Add a GeoIP file digest to the extra-info descriptor. Implements
  19699. enhancement 1883.
  19700. - The NodeFamily option -- which let you declare that you want to
  19701. consider nodes to be part of a family whether they list themselves
  19702. that way or not -- now allows IP address ranges and country codes.
  19703. - Add a new 'Heartbeat' log message type to periodically log a message
  19704. describing Tor's status at level Notice. This feature is meant for
  19705. operators who log at notice, and want to make sure that their Tor
  19706. server is still working. Implementation by George Kadianakis.
  19707. o Minor bugfixes (on 0.2.2.25-alpha):
  19708. - When loading the microdesc journal, remember its current size.
  19709. In 0.2.2, this helps prevent the microdesc journal from growing
  19710. without limit on authorities (who are the only ones to use it in
  19711. 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
  19712. Fix posted by "cypherpunks."
  19713. - The microdesc journal is supposed to get rebuilt only if it is
  19714. at least _half_ the length of the store, not _twice_ the length
  19715. of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
  19716. - If as an authority we fail to compute the identity digest of a v3
  19717. legacy keypair, warn, and don't use a buffer-full of junk instead.
  19718. Bugfix on 0.2.1.1-alpha; fixes bug 3106.
  19719. - Authorities now clean their microdesc cache periodically and when
  19720. reading from disk initially, not only when adding new descriptors.
  19721. This prevents a bug where we could lose microdescriptors. Bugfix
  19722. on 0.2.2.6-alpha.
  19723. o Minor features (controller):
  19724. - Add a new SIGNAL event to the controller interface so that
  19725. controllers can be notified when Tor handles a signal. Resolves
  19726. issue 1955. Patch by John Brooks.
  19727. - Add a new GETINFO option to get total bytes read and written. Patch
  19728. from pipe, revised by atagar. Resolves ticket 2345.
  19729. - Implement some GETINFO controller fields to provide information about
  19730. the Tor process's pid, euid, username, and resource limits.
  19731. o Build changes:
  19732. - Our build system requires automake 1.6 or later to create the
  19733. Makefile.in files. Previously, you could have used 1.4.
  19734. This only affects developers and people building Tor from git;
  19735. people who build Tor from the source distribution without changing
  19736. the Makefile.am files should be fine.
  19737. - Our autogen.sh script uses autoreconf to launch autoconf, automake, and
  19738. so on. This is more robust against some of the failure modes
  19739. associated with running the autotools pieces on their own.
  19740. o Minor packaging issues:
  19741. - On OpenSUSE, create the /var/run/tor directory on startup if it is not
  19742. already created. Patch from Andreas Stieger. Fixes bug 2573.
  19743. o Code simplifications and refactoring:
  19744. - A major revision to our internal node-selecting and listing logic.
  19745. Tor already had at least two major ways to look at the question of
  19746. "which Tor servers do we know about": a list of router descriptors,
  19747. and a list of entries in the current consensus. With
  19748. microdescriptors, we're adding a third. Having so many systems
  19749. without an abstraction layer over them was hurting the codebase.
  19750. Now, we have a new "node_t" abstraction that presents a consistent
  19751. interface to a client's view of a Tor node, and holds (nearly) all
  19752. of the mutable state formerly in routerinfo_t and routerstatus_t.
  19753. - The helper programs tor-gencert, tor-resolve, and tor-checkkey
  19754. no longer link against Libevent: they never used it, but
  19755. our library structure used to force them to link it.
  19756. o Removed features:
  19757. - Remove some old code to work around even older versions of Tor that
  19758. used forked processes to handle DNS requests. Such versions of Tor
  19759. are no longer in use as servers.
  19760. o Documentation fixes:
  19761. - Correct a broken faq link in the INSTALL file. Fixes bug 2307.
  19762. - Add missing documentation for the authority-related torrc options
  19763. RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey. Resolves
  19764. issue 2379.
  19765. Changes in version 0.2.2.25-alpha - 2011-04-29
  19766. Tor 0.2.2.25-alpha fixes many bugs: hidden service clients are more
  19767. robust, routers no longer overreport their bandwidth, Win7 should crash
  19768. a little less, and NEWNYM (as used by Vidalia's "new identity" button)
  19769. now prevents hidden service-related activity from being linkable. It
  19770. provides more information to Vidalia so you can see if your bridge is
  19771. working. Also, 0.2.2.25-alpha revamps the Entry/Exit/ExcludeNodes and
  19772. StrictNodes configuration options to make them more reliable, more
  19773. understandable, and more regularly applied. If you use those options,
  19774. please see the revised documentation for them in the manual page.
  19775. o Major bugfixes:
  19776. - Relays were publishing grossly inflated bandwidth values because
  19777. they were writing their state files wrong--now they write the
  19778. correct value. Also, resume reading bandwidth history from the
  19779. state file correctly. Fixes bug 2704; bugfix on 0.2.2.23-alpha.
  19780. - Improve hidden service robustness: When we find that we have
  19781. extended a hidden service's introduction circuit to a relay not
  19782. listed as an introduction point in the HS descriptor we currently
  19783. have, retry with an introduction point from the current
  19784. descriptor. Previously we would just give up. Fixes bugs 1024 and
  19785. 1930; bugfix on 0.2.0.10-alpha.
  19786. - Clients now stop trying to use an exit node associated with a given
  19787. destination by TrackHostExits if they fail to reach that exit node.
  19788. Fixes bug 2999. Bugfix on 0.2.0.20-rc.
  19789. - Fix crash bug on platforms where gmtime and localtime can return
  19790. NULL. Windows 7 users were running into this one. Fixes part of bug
  19791. 2077. Bugfix on all versions of Tor. Found by boboper.
  19792. o Security and stability fixes:
  19793. - Don't double-free a parsable, but invalid, microdescriptor, even if
  19794. it is followed in the blob we're parsing by an unparsable
  19795. microdescriptor. Fixes an issue reported in a comment on bug 2954.
  19796. Bugfix on 0.2.2.6-alpha; fix by "cypherpunks".
  19797. - If the Nickname configuration option isn't given, Tor would pick a
  19798. nickname based on the local hostname as the nickname for a relay.
  19799. Because nicknames are not very important in today's Tor and the
  19800. "Unnamed" nickname has been implemented, this is now problematic
  19801. behavior: It leaks information about the hostname without being
  19802. useful at all. Fixes bug 2979; bugfix on 0.1.2.2-alpha, which
  19803. introduced the Unnamed nickname. Reported by tagnaq.
  19804. - Fix an uncommon assertion failure when running with DNSPort under
  19805. heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
  19806. - Avoid linkability based on cached hidden service descriptors: forget
  19807. all hidden service descriptors cached as a client when processing a
  19808. SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
  19809. o Major features:
  19810. - Export GeoIP information on bridge usage to controllers even if we
  19811. have not yet been running for 24 hours. Now Vidalia bridge operators
  19812. can get more accurate and immediate feedback about their
  19813. contributions to the network.
  19814. o Major features and bugfixes (node selection):
  19815. - Revise and reconcile the meaning of the ExitNodes, EntryNodes,
  19816. ExcludeEntryNodes, ExcludeExitNodes, ExcludeNodes, and StrictNodes
  19817. options. Previously, we had been ambiguous in describing what
  19818. counted as an "exit" node, and what operations exactly "StrictNodes
  19819. 0" would permit. This created confusion when people saw nodes built
  19820. through unexpected circuits, and made it hard to tell real bugs from
  19821. surprises. Now the intended behavior is:
  19822. . "Exit", in the context of ExitNodes and ExcludeExitNodes, means
  19823. a node that delivers user traffic outside the Tor network.
  19824. . "Entry", in the context of EntryNodes, means a node used as the
  19825. first hop of a multihop circuit. It doesn't include direct
  19826. connections to directory servers.
  19827. . "ExcludeNodes" applies to all nodes.
  19828. . "StrictNodes" changes the behavior of ExcludeNodes only. When
  19829. StrictNodes is set, Tor should avoid all nodes listed in
  19830. ExcludeNodes, even when it will make user requests fail. When
  19831. StrictNodes is *not* set, then Tor should follow ExcludeNodes
  19832. whenever it can, except when it must use an excluded node to
  19833. perform self-tests, connect to a hidden service, provide a
  19834. hidden service, fulfill a .exit request, upload directory
  19835. information, or fetch directory information.
  19836. Collectively, the changes to implement the behavior fix bug 1090.
  19837. - ExcludeNodes now takes precedence over EntryNodes and ExitNodes: if
  19838. a node is listed in both, it's treated as excluded.
  19839. - ExcludeNodes now applies to directory nodes -- as a preference if
  19840. StrictNodes is 0, or an absolute requirement if StrictNodes is 1.
  19841. Don't exclude all the directory authorities and set StrictNodes to 1
  19842. unless you really want your Tor to break.
  19843. - ExcludeNodes and ExcludeExitNodes now override exit enclaving.
  19844. - ExcludeExitNodes now overrides .exit requests.
  19845. - We don't use bridges listed in ExcludeNodes.
  19846. - When StrictNodes is 1:
  19847. . We now apply ExcludeNodes to hidden service introduction points
  19848. and to rendezvous points selected by hidden service users. This
  19849. can make your hidden service less reliable: use it with caution!
  19850. . If we have used ExcludeNodes on ourself, do not try relay
  19851. reachability self-tests.
  19852. . If we have excluded all the directory authorities, we will not
  19853. even try to upload our descriptor if we're a relay.
  19854. . Do not honor .exit requests to an excluded node.
  19855. - Remove a misfeature that caused us to ignore the Fast/Stable flags
  19856. when ExitNodes is set. Bugfix on 0.2.2.7-alpha.
  19857. - When the set of permitted nodes changes, we now remove any mappings
  19858. introduced via TrackExitHosts to now-excluded nodes. Bugfix on
  19859. 0.1.0.1-rc.
  19860. - We never cannibalize a circuit that had excluded nodes on it, even
  19861. if StrictNodes is 0. Bugfix on 0.1.0.1-rc.
  19862. - Revert a change where we would be laxer about attaching streams to
  19863. circuits than when building the circuits. This was meant to prevent
  19864. a set of bugs where streams were never attachable, but our improved
  19865. code here should make this unnecessary. Bugfix on 0.2.2.7-alpha.
  19866. - Keep track of how many times we launch a new circuit to handle a
  19867. given stream. Too many launches could indicate an inconsistency
  19868. between our "launch a circuit to handle this stream" logic and our
  19869. "attach this stream to one of the available circuits" logic.
  19870. - Improve log messages related to excluded nodes.
  19871. o Minor bugfixes:
  19872. - Fix a spurious warning when moving from a short month to a long
  19873. month on relays with month-based BandwidthAccounting. Bugfix on
  19874. 0.2.2.17-alpha; fixes bug 3020.
  19875. - When a client finds that an origin circuit has run out of 16-bit
  19876. stream IDs, we now mark it as unusable for new streams. Previously,
  19877. we would try to close the entire circuit. Bugfix on 0.0.6.
  19878. - Add a forgotten cast that caused a compile warning on OS X 10.6.
  19879. Bugfix on 0.2.2.24-alpha.
  19880. - Be more careful about reporting the correct error from a failed
  19881. connect() system call. Under some circumstances, it was possible to
  19882. look at an incorrect value for errno when sending the end reason.
  19883. Bugfix on 0.1.0.1-rc.
  19884. - Correctly handle an "impossible" overflow cases in connection byte
  19885. counting, where we write or read more than 4GB on an edge connection
  19886. in a single second. Bugfix on 0.1.2.8-beta.
  19887. - Correct the warning displayed when a rendezvous descriptor exceeds
  19888. the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
  19889. John Brooks.
  19890. - Clients and hidden services now use HSDir-flagged relays for hidden
  19891. service descriptor downloads and uploads even if the relays have no
  19892. DirPort set and the client has disabled TunnelDirConns. This will
  19893. eventually allow us to give the HSDir flag to relays with no
  19894. DirPort. Fixes bug 2722; bugfix on 0.2.1.6-alpha.
  19895. - Downgrade "no current certificates known for authority" message from
  19896. Notice to Info. Fixes bug 2899; bugfix on 0.2.0.10-alpha.
  19897. - Make the SIGNAL DUMP control-port command work on FreeBSD. Fixes bug
  19898. 2917. Bugfix on 0.1.1.1-alpha.
  19899. - Only limit the lengths of single HS descriptors, even when multiple
  19900. HS descriptors are published to an HSDir relay in a single POST
  19901. operation. Fixes bug 2948; bugfix on 0.2.1.5-alpha. Found by hsdir.
  19902. - Write the current time into the LastWritten line in our state file,
  19903. rather than the time from the previous write attempt. Also, stop
  19904. trying to use a time of -1 in our log statements. Fixes bug 3039;
  19905. bugfix on 0.2.2.14-alpha.
  19906. - Be more consistent in our treatment of file system paths. "~" should
  19907. get expanded to the user's home directory in the Log config option.
  19908. Fixes bug 2971; bugfix on 0.2.0.1-alpha, which introduced the
  19909. feature for the -f and --DataDirectory options.
  19910. o Minor features:
  19911. - Make sure every relay writes a state file at least every 12 hours.
  19912. Previously, a relay could go for weeks without writing its state
  19913. file, and on a crash could lose its bandwidth history, capacity
  19914. estimates, client country statistics, and so on. Addresses bug 3012.
  19915. - Send END_STREAM_REASON_NOROUTE in response to EHOSTUNREACH errors.
  19916. Clients before 0.2.1.27 didn't handle NOROUTE correctly, but such
  19917. clients are already deprecated because of security bugs.
  19918. - Don't allow v0 hidden service authorities to act as clients.
  19919. Required by fix for bug 3000.
  19920. - Ignore SIGNAL NEWNYM commands on relay-only Tor instances. Required
  19921. by fix for bug 3000.
  19922. - Ensure that no empty [dirreq-](read|write)-history lines are added
  19923. to an extrainfo document. Implements ticket 2497.
  19924. o Code simplification and refactoring:
  19925. - Remove workaround code to handle directory responses from servers
  19926. that had bug 539 (they would send HTTP status 503 responses _and_
  19927. send a body too). Since only server versions before
  19928. 0.2.0.16-alpha/0.1.2.19 were affected, there is no longer reason to
  19929. keep the workaround in place.
  19930. - Remove the old 'fuzzy time' logic. It was supposed to be used for
  19931. handling calculations where we have a known amount of clock skew and
  19932. an allowed amount of unknown skew. But we only used it in three
  19933. places, and we never adjusted the known/unknown skew values. This is
  19934. still something we might want to do someday, but if we do, we'll
  19935. want to do it differently.
  19936. - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
  19937. None of the cases where we did this before were wrong, but by making
  19938. this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
  19939. - Use GetTempDir to find the proper temporary directory location on
  19940. Windows when generating temporary files for the unit tests. Patch by
  19941. Gisle Vanem.
  19942. Changes in version 0.2.2.24-alpha - 2011-04-08
  19943. Tor 0.2.2.24-alpha fixes a variety of bugs, including a big bug that
  19944. prevented Tor clients from effectively using "multihomed" bridges,
  19945. that is, bridges that listen on multiple ports or IP addresses so users
  19946. can continue to use some of their addresses even if others get blocked.
  19947. o Major bugfixes:
  19948. - Fix a bug where bridge users who configure the non-canonical
  19949. address of a bridge automatically switch to its canonical
  19950. address. If a bridge listens at more than one address, it should be
  19951. able to advertise those addresses independently and any non-blocked
  19952. addresses should continue to work. Bugfix on Tor 0.2.0.x. Fixes
  19953. bug 2510.
  19954. - If you configured Tor to use bridge A, and then quit and
  19955. configured Tor to use bridge B instead, it would happily continue
  19956. to use bridge A if it's still reachable. While this behavior is
  19957. a feature if your goal is connectivity, in some scenarios it's a
  19958. dangerous bug. Bugfix on Tor 0.2.0.1-alpha; fixes bug 2511.
  19959. - Directory authorities now use data collected from their own
  19960. uptime observations when choosing whether to assign the HSDir flag
  19961. to relays, instead of trusting the uptime value the relay reports in
  19962. its descriptor. This change helps prevent an attack where a small
  19963. set of nodes with frequently-changing identity keys can blackhole
  19964. a hidden service. (Only authorities need upgrade; others will be
  19965. fine once they do.) Bugfix on 0.2.0.10-alpha; fixes bug 2709.
  19966. o Minor bugfixes:
  19967. - When we restart our relay, we might get a successful connection
  19968. from the outside before we've started our reachability tests,
  19969. triggering a warning: "ORPort found reachable, but I have no
  19970. routerinfo yet. Failing to inform controller of success." This
  19971. bug was harmless unless Tor is running under a controller
  19972. like Vidalia, in which case the controller would never get a
  19973. REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
  19974. fixes bug 1172.
  19975. - Make directory authorities more accurate at recording when
  19976. relays that have failed several reachability tests became
  19977. unreachable, so we can provide more accuracy at assigning Stable,
  19978. Guard, HSDir, etc flags. Bugfix on 0.2.0.6-alpha. Resolves bug 2716.
  19979. - Fix an issue that prevented static linking of libevent on
  19980. some platforms (notably Linux). Fixes bug 2698; bugfix on
  19981. versions 0.2.1.23/0.2.2.8-alpha (the versions introducing
  19982. the --with-static-libevent configure option).
  19983. - We now ask the other side of a stream (the client or the exit)
  19984. for more data on that stream when the amount of queued data on
  19985. that stream dips low enough. Previously, we wouldn't ask the
  19986. other side for more data until either it sent us more data (which
  19987. it wasn't supposed to do if it had exhausted its window!) or we
  19988. had completely flushed all our queued data. This flow control fix
  19989. should improve throughput. Fixes bug 2756; bugfix on the earliest
  19990. released versions of Tor (svn commit r152).
  19991. - Avoid a double-mark-for-free warning when failing to attach a
  19992. transparent proxy connection. (We thought we had fixed this in
  19993. 0.2.2.23-alpha, but it turns out our fix was checking the wrong
  19994. connection.) Fixes bug 2757; bugfix on 0.1.2.1-alpha (the original
  19995. bug) and 0.2.2.23-alpha (the incorrect fix).
  19996. - When warning about missing zlib development packages during compile,
  19997. give the correct package names. Bugfix on 0.2.0.1-alpha.
  19998. o Minor features:
  19999. - Directory authorities now log the source of a rejected POSTed v3
  20000. networkstatus vote.
  20001. - Make compilation with clang possible when using
  20002. --enable-gcc-warnings by removing two warning options that clang
  20003. hasn't implemented yet and by fixing a few warnings. Implements
  20004. ticket 2696.
  20005. - When expiring circuits, use microsecond timers rather than
  20006. one-second timers. This can avoid an unpleasant situation where a
  20007. circuit is launched near the end of one second and expired right
  20008. near the beginning of the next, and prevent fluctuations in circuit
  20009. timeout values.
  20010. - Use computed circuit-build timeouts to decide when to launch
  20011. parallel introduction circuits for hidden services. (Previously,
  20012. we would retry after 15 seconds.)
  20013. - Update to the April 1 2011 Maxmind GeoLite Country database.
  20014. o Packaging fixes:
  20015. - Create the /var/run/tor directory on startup on OpenSUSE if it is
  20016. not already created. Patch from Andreas Stieger. Fixes bug 2573.
  20017. o Documentation changes:
  20018. - Modernize the doxygen configuration file slightly. Fixes bug 2707.
  20019. - Resolve all doxygen warnings except those for missing documentation.
  20020. Fixes bug 2705.
  20021. - Add doxygen documentation for more functions, fields, and types.
  20022. Changes in version 0.2.2.23-alpha - 2011-03-08
  20023. Tor 0.2.2.23-alpha lets relays record their bandwidth history so when
  20024. they restart they don't lose their bandwidth capacity estimate. This
  20025. release also fixes a diverse set of user-facing bugs, ranging from
  20026. relays overrunning their rate limiting to clients falsely warning about
  20027. clock skew to bridge descriptor leaks by our bridge directory authority.
  20028. o Major bugfixes:
  20029. - Stop sending a CLOCK_SKEW controller status event whenever
  20030. we fetch directory information from a relay that has a wrong clock.
  20031. Instead, only inform the controller when it's a trusted authority
  20032. that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
  20033. the rest of bug 1074.
  20034. - Fix an assert in parsing router descriptors containing IPv6
  20035. addresses. This one took down the directory authorities when
  20036. somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
  20037. - Make the bridge directory authority refuse to answer directory
  20038. requests for "all" descriptors. It used to include bridge
  20039. descriptors in its answer, which was a major information leak.
  20040. Found by "piebeer". Bugfix on 0.2.0.3-alpha.
  20041. - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
  20042. Tor would ignore their RelayBandwidthBurst setting,
  20043. potentially using more bandwidth than expected. Bugfix on
  20044. 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
  20045. - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
  20046. hidserv" in her torrc. The 'hidserv' argument never controlled
  20047. publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
  20048. o Major features:
  20049. - Relays now save observed peak bandwidth throughput rates to their
  20050. state file (along with total usage, which was already saved)
  20051. so that they can determine their correct estimated bandwidth on
  20052. restart. Resolves bug 1863, where Tor relays would reset their
  20053. estimated bandwidth to 0 after restarting.
  20054. - Directory authorities now take changes in router IP address and
  20055. ORPort into account when determining router stability. Previously,
  20056. if a router changed its IP or ORPort, the authorities would not
  20057. treat it as having any downtime for the purposes of stability
  20058. calculation, whereas clients would experience downtime since the
  20059. change could take a while to propagate to them. Resolves issue 1035.
  20060. - Enable Address Space Layout Randomization (ASLR) and Data Execution
  20061. Prevention (DEP) by default on Windows to make it harder for
  20062. attackers to exploit vulnerabilities. Patch from John Brooks.
  20063. o Minor bugfixes (on 0.2.1.x and earlier):
  20064. - Fix a rare crash bug that could occur when a client was configured
  20065. with a large number of bridges. Fixes bug 2629; bugfix on
  20066. 0.2.1.2-alpha. Bugfix by trac user "shitlei".
  20067. - Avoid a double mark-for-free warning when failing to attach a
  20068. transparent proxy connection. Bugfix on 0.1.2.1-alpha. Fixes
  20069. bug 2279.
  20070. - Correctly detect failure to allocate an OpenSSL BIO. Fixes bug 2378;
  20071. found by "cypherpunks". This bug was introduced before the first
  20072. Tor release, in svn commit r110.
  20073. - Country codes aren't supported in EntryNodes until 0.2.3.x, so
  20074. don't mention them in the manpage. Fixes bug 2450; issue
  20075. spotted by keb and G-Lo.
  20076. - Fix a bug in bandwidth history state parsing that could have been
  20077. triggered if a future version of Tor ever changed the timing
  20078. granularity at which bandwidth history is measured. Bugfix on
  20079. Tor 0.1.1.11-alpha.
  20080. - When a relay decides that its DNS is too broken for it to serve
  20081. as an exit server, it advertised itself as a non-exit, but
  20082. continued to act as an exit. This could create accidental
  20083. partitioning opportunities for users. Instead, if a relay is
  20084. going to advertise reject *:* as its exit policy, it should
  20085. really act with exit policy "reject *:*". Fixes bug 2366.
  20086. Bugfix on Tor 0.1.2.5-alpha. Bugfix by user "postman" on trac.
  20087. - In the special case where you configure a public exit relay as your
  20088. bridge, Tor would be willing to use that exit relay as the last
  20089. hop in your circuit as well. Now we fail that circuit instead.
  20090. Bugfix on 0.2.0.12-alpha. Fixes bug 2403. Reported by "piebeer".
  20091. - Fix a bug with our locking implementation on Windows that couldn't
  20092. correctly detect when a file was already locked. Fixes bug 2504,
  20093. bugfix on 0.2.1.6-alpha.
  20094. - Fix IPv6-related connect() failures on some platforms (BSD, OS X).
  20095. Bugfix on 0.2.0.3-alpha; fixes first part of bug 2660. Patch by
  20096. "piebeer".
  20097. - Set target port in get_interface_address6() correctly. Bugfix
  20098. on 0.1.1.4-alpha and 0.2.0.3-alpha; fixes second part of bug 2660.
  20099. - Directory authorities are now more robust to hops back in time
  20100. when calculating router stability. Previously, if a run of uptime
  20101. or downtime appeared to be negative, the calculation could give
  20102. incorrect results. Bugfix on 0.2.0.6-alpha; noticed when fixing
  20103. bug 1035.
  20104. - Fix an assert that got triggered when using the TestingTorNetwork
  20105. configuration option and then issuing a GETINFO config-text control
  20106. command. Fixes bug 2250; bugfix on 0.2.1.2-alpha.
  20107. o Minor bugfixes (on 0.2.2.x):
  20108. - Clients should not weight BadExit nodes as Exits in their node
  20109. selection. Similarly, directory authorities should not count BadExit
  20110. bandwidth as Exit bandwidth when computing bandwidth-weights.
  20111. Bugfix on 0.2.2.10-alpha; fixes bug 2203.
  20112. - Correctly clear our dir_read/dir_write history when there is an
  20113. error parsing any bw history value from the state file. Bugfix on
  20114. Tor 0.2.2.15-alpha.
  20115. - Resolve a bug in verifying signatures of directory objects
  20116. with digests longer than SHA1. Bugfix on 0.2.2.20-alpha.
  20117. Fixes bug 2409. Found by "piebeer".
  20118. - Bridge authorities no longer crash on SIGHUP when they try to
  20119. publish their relay descriptor to themselves. Fixes bug 2572. Bugfix
  20120. on 0.2.2.22-alpha.
  20121. o Minor features:
  20122. - Log less aggressively about circuit timeout changes, and improve
  20123. some other circuit timeout messages. Resolves bug 2004.
  20124. - Log a little more clearly about the times at which we're no longer
  20125. accepting new connections. Resolves bug 2181.
  20126. - Reject attempts at the client side to open connections to private
  20127. IP addresses (like 127.0.0.1, 10.0.0.1, and so on) with
  20128. a randomly chosen exit node. Attempts to do so are always
  20129. ill-defined, generally prevented by exit policies, and usually
  20130. in error. This will also help to detect loops in transparent
  20131. proxy configurations. You can disable this feature by setting
  20132. "ClientRejectInternalAddresses 0" in your torrc.
  20133. - Always treat failure to allocate an RSA key as an unrecoverable
  20134. allocation error.
  20135. - Update to the March 1 2011 Maxmind GeoLite Country database.
  20136. o Minor features (log subsystem):
  20137. - Add documentation for configuring logging at different severities in
  20138. different log domains. We've had this feature since 0.2.1.1-alpha,
  20139. but for some reason it never made it into the manpage. Fixes
  20140. bug 2215.
  20141. - Make it simpler to specify "All log domains except for A and B".
  20142. Previously you needed to say "[*,~A,~B]". Now you can just say
  20143. "[~A,~B]".
  20144. - Add a "LogMessageDomains 1" option to include the domains of log
  20145. messages along with the messages. Without this, there's no way
  20146. to use log domains without reading the source or doing a lot
  20147. of guessing.
  20148. o Packaging changes:
  20149. - Stop shipping the Tor specs files and development proposal documents
  20150. in the tarball. They are now in a separate git repository at
  20151. git://git.torproject.org/torspec.git
  20152. Changes in version 0.2.1.30 - 2011-02-23
  20153. Tor 0.2.1.30 fixes a variety of less critical bugs. The main other
  20154. change is a slight tweak to Tor's TLS handshake that makes relays
  20155. and bridges that run this new version reachable from Iran again.
  20156. We don't expect this tweak will win the arms race long-term, but it
  20157. buys us time until we roll out a better solution.
  20158. o Major bugfixes:
  20159. - Stop sending a CLOCK_SKEW controller status event whenever
  20160. we fetch directory information from a relay that has a wrong clock.
  20161. Instead, only inform the controller when it's a trusted authority
  20162. that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
  20163. the rest of bug 1074.
  20164. - Fix a bounds-checking error that could allow an attacker to
  20165. remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
  20166. Found by "piebeer".
  20167. - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
  20168. Tor would ignore their RelayBandwidthBurst setting,
  20169. potentially using more bandwidth than expected. Bugfix on
  20170. 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
  20171. - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
  20172. hidserv" in her torrc. The 'hidserv' argument never controlled
  20173. publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
  20174. o Minor features:
  20175. - Adjust our TLS Diffie-Hellman parameters to match those used by
  20176. Apache's mod_ssl.
  20177. - Update to the February 1 2011 Maxmind GeoLite Country database.
  20178. o Minor bugfixes:
  20179. - Check for and reject overly long directory certificates and
  20180. directory tokens before they have a chance to hit any assertions.
  20181. Bugfix on 0.2.1.28. Found by "doorss".
  20182. - Bring the logic that gathers routerinfos and assesses the
  20183. acceptability of circuits into line. This prevents a Tor OP from
  20184. getting locked in a cycle of choosing its local OR as an exit for a
  20185. path (due to a .exit request) and then rejecting the circuit because
  20186. its OR is not listed yet. It also prevents Tor clients from using an
  20187. OR running in the same instance as an exit (due to a .exit request)
  20188. if the OR does not meet the same requirements expected of an OR
  20189. running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
  20190. o Packaging changes:
  20191. - Stop shipping the Tor specs files and development proposal documents
  20192. in the tarball. They are now in a separate git repository at
  20193. git://git.torproject.org/torspec.git
  20194. - Do not include Git version tags as though they are SVN tags when
  20195. generating a tarball from inside a repository that has switched
  20196. between branches. Bugfix on 0.2.1.15-rc; fixes bug 2402.
  20197. Changes in version 0.2.2.22-alpha - 2011-01-25
  20198. Tor 0.2.2.22-alpha fixes a few more less-critical security issues. The
  20199. main other change is a slight tweak to Tor's TLS handshake that makes
  20200. relays and bridges that run this new version reachable from Iran again.
  20201. We don't expect this tweak will win the arms race long-term, but it
  20202. will buy us a bit more time until we roll out a better solution.
  20203. o Major bugfixes:
  20204. - Fix a bounds-checking error that could allow an attacker to
  20205. remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
  20206. Found by "piebeer".
  20207. - Don't assert when changing from bridge to relay or vice versa
  20208. via the controller. The assert happened because we didn't properly
  20209. initialize our keys in this case. Bugfix on 0.2.2.18-alpha; fixes
  20210. bug 2433. Reported by bastik.
  20211. o Minor features:
  20212. - Adjust our TLS Diffie-Hellman parameters to match those used by
  20213. Apache's mod_ssl.
  20214. - Provide a log message stating which geoip file we're parsing
  20215. instead of just stating that we're parsing the geoip file.
  20216. Implements ticket 2432.
  20217. o Minor bugfixes:
  20218. - Check for and reject overly long directory certificates and
  20219. directory tokens before they have a chance to hit any assertions.
  20220. Bugfix on 0.2.1.28 / 0.2.2.20-alpha. Found by "doorss".
  20221. Changes in version 0.2.2.21-alpha - 2011-01-15
  20222. Tor 0.2.2.21-alpha includes all the patches from Tor 0.2.1.29, which
  20223. continues our recent code security audit work. The main fix resolves
  20224. a remote heap overflow vulnerability that can allow remote code
  20225. execution (CVE-2011-0427). Other fixes address a variety of assert
  20226. and crash bugs, most of which we think are hard to exploit remotely.
  20227. o Major bugfixes (security), also included in 0.2.1.29:
  20228. - Fix a heap overflow bug where an adversary could cause heap
  20229. corruption. This bug probably allows remote code execution
  20230. attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
  20231. 0.1.2.10-rc.
  20232. - Prevent a denial-of-service attack by disallowing any
  20233. zlib-compressed data whose compression factor is implausibly
  20234. high. Fixes part of bug 2324; reported by "doorss".
  20235. - Zero out a few more keys in memory before freeing them. Fixes
  20236. bug 2384 and part of bug 2385. These key instances found by
  20237. "cypherpunks", based on Andrew Case's report about being able
  20238. to find sensitive data in Tor's memory space if you have enough
  20239. permissions. Bugfix on 0.0.2pre9.
  20240. o Major bugfixes (crashes), also included in 0.2.1.29:
  20241. - Prevent calls to Libevent from inside Libevent log handlers.
  20242. This had potential to cause a nasty set of crashes, especially
  20243. if running Libevent with debug logging enabled, and running
  20244. Tor with a controller watching for low-severity log messages.
  20245. Bugfix on 0.1.0.2-rc. Fixes bug 2190.
  20246. - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
  20247. underflow errors there too. Fixes the other part of bug 2324.
  20248. - Fix a bug where we would assert if we ever had a
  20249. cached-descriptors.new file (or another file read directly into
  20250. memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
  20251. on 0.2.1.25. Found by doorss.
  20252. - Fix some potential asserts and parsing issues with grossly
  20253. malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
  20254. Found by doorss.
  20255. o Minor bugfixes (other), also included in 0.2.1.29:
  20256. - Fix a bug with handling misformed replies to reverse DNS lookup
  20257. requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
  20258. bug reported by doorss.
  20259. - Fix compilation on mingw when a pthreads compatibility library
  20260. has been installed. (We don't want to use it, so we shouldn't
  20261. be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
  20262. - Fix a bug where we would declare that we had run out of virtual
  20263. addresses when the address space was only half-exhausted. Bugfix
  20264. on 0.1.2.1-alpha.
  20265. - Correctly handle the case where AutomapHostsOnResolve is set but
  20266. no virtual addresses are available. Fixes bug 2328; bugfix on
  20267. 0.1.2.1-alpha. Bug found by doorss.
  20268. - Correctly handle wrapping around when we run out of virtual
  20269. address space. Found by cypherpunks; bugfix on 0.2.0.5-alpha.
  20270. o Minor features, also included in 0.2.1.29:
  20271. - Update to the January 1 2011 Maxmind GeoLite Country database.
  20272. - Introduce output size checks on all of our decryption functions.
  20273. o Build changes, also included in 0.2.1.29:
  20274. - Tor does not build packages correctly with Automake 1.6 and earlier;
  20275. added a check to Makefile.am to make sure that we're building with
  20276. Automake 1.7 or later.
  20277. - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
  20278. because we built it with a too-old version of automake. Thus that
  20279. release broke ./configure --enable-openbsd-malloc, which is popular
  20280. among really fast exit relays on Linux.
  20281. o Major bugfixes, new in 0.2.2.21-alpha:
  20282. - Prevent crash/heap corruption when the cbtnummodes consensus
  20283. parameter is set to 0 or large values. Fixes bug 2317; bugfix
  20284. on 0.2.2.14-alpha.
  20285. o Major features, new in 0.2.2.21-alpha:
  20286. - Introduce minimum/maximum values that clients will believe
  20287. from the consensus. Now we'll have a better chance to avoid crashes
  20288. or worse when a consensus param has a weird value.
  20289. o Minor features, new in 0.2.2.21-alpha:
  20290. - Make sure to disable DirPort if running as a bridge. DirPorts aren't
  20291. used on bridges, and it makes bridge scanning somewhat easier.
  20292. - If writing the state file to disk fails, wait up to an hour before
  20293. retrying again, rather than trying again each second. Fixes bug
  20294. 2346; bugfix on Tor 0.1.1.3-alpha.
  20295. - Make Libevent log messages get delivered to controllers later,
  20296. and not from inside the Libevent log handler. This prevents unsafe
  20297. reentrant Libevent calls while still letting the log messages
  20298. get through.
  20299. - Detect platforms that brokenly use a signed size_t, and refuse to
  20300. build there. Found and analyzed by doorss and rransom.
  20301. - Fix a bunch of compile warnings revealed by mingw with gcc 4.5.
  20302. Resolves bug 2314.
  20303. o Minor bugfixes, new in 0.2.2.21-alpha:
  20304. - Handle SOCKS messages longer than 128 bytes long correctly, rather
  20305. than waiting forever for them to finish. Fixes bug 2330; bugfix
  20306. on 0.2.0.16-alpha. Found by doorss.
  20307. - Add assertions to check for overflow in arguments to
  20308. base32_encode() and base32_decode(); fix a signed-unsigned
  20309. comparison there too. These bugs are not actually reachable in Tor,
  20310. but it's good to prevent future errors too. Found by doorss.
  20311. - Correctly detect failures to create DNS requests when using Libevent
  20312. versions before v2. (Before Libevent 2, we used our own evdns
  20313. implementation. Its return values for Libevent's evdns_resolve_*()
  20314. functions are not consistent with those from Libevent.) Fixes bug
  20315. 2363; bugfix on 0.2.2.6-alpha. Found by "lodger".
  20316. o Documentation, new in 0.2.2.21-alpha:
  20317. - Document the default socks host and port (127.0.0.1:9050) for
  20318. tor-resolve.
  20319. Changes in version 0.2.1.29 - 2011-01-15
  20320. Tor 0.2.1.29 continues our recent code security audit work. The main
  20321. fix resolves a remote heap overflow vulnerability that can allow remote
  20322. code execution. Other fixes address a variety of assert and crash bugs,
  20323. most of which we think are hard to exploit remotely.
  20324. o Major bugfixes (security):
  20325. - Fix a heap overflow bug where an adversary could cause heap
  20326. corruption. This bug probably allows remote code execution
  20327. attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
  20328. 0.1.2.10-rc.
  20329. - Prevent a denial-of-service attack by disallowing any
  20330. zlib-compressed data whose compression factor is implausibly
  20331. high. Fixes part of bug 2324; reported by "doorss".
  20332. - Zero out a few more keys in memory before freeing them. Fixes
  20333. bug 2384 and part of bug 2385. These key instances found by
  20334. "cypherpunks", based on Andrew Case's report about being able
  20335. to find sensitive data in Tor's memory space if you have enough
  20336. permissions. Bugfix on 0.0.2pre9.
  20337. o Major bugfixes (crashes):
  20338. - Prevent calls to Libevent from inside Libevent log handlers.
  20339. This had potential to cause a nasty set of crashes, especially
  20340. if running Libevent with debug logging enabled, and running
  20341. Tor with a controller watching for low-severity log messages.
  20342. Bugfix on 0.1.0.2-rc. Fixes bug 2190.
  20343. - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
  20344. underflow errors there too. Fixes the other part of bug 2324.
  20345. - Fix a bug where we would assert if we ever had a
  20346. cached-descriptors.new file (or another file read directly into
  20347. memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
  20348. on 0.2.1.25. Found by doorss.
  20349. - Fix some potential asserts and parsing issues with grossly
  20350. malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
  20351. Found by doorss.
  20352. o Minor bugfixes (other):
  20353. - Fix a bug with handling misformed replies to reverse DNS lookup
  20354. requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
  20355. bug reported by doorss.
  20356. - Fix compilation on mingw when a pthreads compatibility library
  20357. has been installed. (We don't want to use it, so we shouldn't
  20358. be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
  20359. - Fix a bug where we would declare that we had run out of virtual
  20360. addresses when the address space was only half-exhausted. Bugfix
  20361. on 0.1.2.1-alpha.
  20362. - Correctly handle the case where AutomapHostsOnResolve is set but
  20363. no virtual addresses are available. Fixes bug 2328; bugfix on
  20364. 0.1.2.1-alpha. Bug found by doorss.
  20365. - Correctly handle wrapping around to when we run out of virtual
  20366. address space. Found by cypherpunks, bugfix on 0.2.0.5-alpha.
  20367. - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
  20368. because we built it with a too-old version of automake. Thus that
  20369. release broke ./configure --enable-openbsd-malloc, which is popular
  20370. among really fast exit relays on Linux.
  20371. o Minor features:
  20372. - Update to the January 1 2011 Maxmind GeoLite Country database.
  20373. - Introduce output size checks on all of our decryption functions.
  20374. o Build changes:
  20375. - Tor does not build packages correctly with Automake 1.6 and earlier;
  20376. added a check to Makefile.am to make sure that we're building with
  20377. Automake 1.7 or later.
  20378. Changes in version 0.2.2.20-alpha - 2010-12-17
  20379. Tor 0.2.2.20-alpha does some code cleanup to reduce the risk of remotely
  20380. exploitable bugs. We also fix a variety of other significant bugs,
  20381. change the IP address for one of our directory authorities, and update
  20382. the minimum version that Tor relays must run to join the network.
  20383. o Major bugfixes:
  20384. - Fix a remotely exploitable bug that could be used to crash instances
  20385. of Tor remotely by overflowing on the heap. Remote-code execution
  20386. hasn't been confirmed, but can't be ruled out. Everyone should
  20387. upgrade. Bugfix on the 0.1.1 series and later.
  20388. - Fix a bug that could break accounting on 64-bit systems with large
  20389. time_t values, making them hibernate for impossibly long intervals.
  20390. Fixes bug 2146. Bugfix on 0.0.9pre6; fix by boboper.
  20391. - Fix a logic error in directory_fetches_from_authorities() that
  20392. would cause all _non_-exits refusing single-hop-like circuits
  20393. to fetch from authorities, when we wanted to have _exits_ fetch
  20394. from authorities. Fixes more of 2097. Bugfix on 0.2.2.16-alpha;
  20395. fix by boboper.
  20396. - Fix a stream fairness bug that would cause newer streams on a given
  20397. circuit to get preference when reading bytes from the origin or
  20398. destination. Fixes bug 2210. Fix by Mashael AlSabah. This bug was
  20399. introduced before the first Tor release, in svn revision r152.
  20400. o Directory authority changes:
  20401. - Change IP address and ports for gabelmoo (v3 directory authority).
  20402. o Minor bugfixes:
  20403. - Avoid crashes when AccountingMax is set on clients. Fixes bug 2235.
  20404. Bugfix on 0.2.2.18-alpha. Diagnosed by boboper.
  20405. - Fix an off-by-one error in calculating some controller command
  20406. argument lengths. Fortunately, this mistake is harmless since
  20407. the controller code does redundant NUL termination too. Found by
  20408. boboper. Bugfix on 0.1.1.1-alpha.
  20409. - Do not dereference NULL if a bridge fails to build its
  20410. extra-info descriptor. Found by an anonymous commenter on
  20411. Trac. Bugfix on 0.2.2.19-alpha.
  20412. o Minor features:
  20413. - Update to the December 1 2010 Maxmind GeoLite Country database.
  20414. - Directory authorities now reject relays running any versions of
  20415. Tor between 0.2.1.3-alpha and 0.2.1.18 inclusive; they have
  20416. known bugs that keep RELAY_EARLY cells from working on rendezvous
  20417. circuits. Followup to fix for bug 2081.
  20418. - Directory authorities now reject relays running any version of Tor
  20419. older than 0.2.0.26-rc. That version is the earliest that fetches
  20420. current directory information correctly. Fixes bug 2156.
  20421. - Report only the top 10 ports in exit-port stats in order not to
  20422. exceed the maximum extra-info descriptor length of 50 KB. Implements
  20423. task 2196.
  20424. Changes in version 0.2.1.28 - 2010-12-17
  20425. Tor 0.2.1.28 does some code cleanup to reduce the risk of remotely
  20426. exploitable bugs. We also took this opportunity to change the IP address
  20427. for one of our directory authorities, and to update the geoip database
  20428. we ship.
  20429. o Major bugfixes:
  20430. - Fix a remotely exploitable bug that could be used to crash instances
  20431. of Tor remotely by overflowing on the heap. Remote-code execution
  20432. hasn't been confirmed, but can't be ruled out. Everyone should
  20433. upgrade. Bugfix on the 0.1.1 series and later.
  20434. o Directory authority changes:
  20435. - Change IP address and ports for gabelmoo (v3 directory authority).
  20436. o Minor features:
  20437. - Update to the December 1 2010 Maxmind GeoLite Country database.
  20438. Changes in version 0.2.1.27 - 2010-11-23
  20439. Yet another OpenSSL security patch broke its compatibility with Tor:
  20440. Tor 0.2.1.27 makes relays work with openssl 0.9.8p and 1.0.0.b. We
  20441. also took this opportunity to fix several crash bugs, integrate a new
  20442. directory authority, and update the bundled GeoIP database.
  20443. o Major bugfixes:
  20444. - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
  20445. No longer set the tlsext_host_name extension on server SSL objects;
  20446. but continue to set it on client SSL objects. Our goal in setting
  20447. it was to imitate a browser, not a vhosting server. Fixes bug 2204;
  20448. bugfix on 0.2.1.1-alpha.
  20449. - Do not log messages to the controller while shrinking buffer
  20450. freelists. Doing so would sometimes make the controller connection
  20451. try to allocate a buffer chunk, which would mess up the internals
  20452. of the freelist and cause an assertion failure. Fixes bug 1125;
  20453. fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
  20454. - Learn our external IP address when we're a relay or bridge, even if
  20455. we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
  20456. where we introduced bridge relays that don't need to publish to
  20457. be useful. Fixes bug 2050.
  20458. - Do even more to reject (and not just ignore) annotations on
  20459. router descriptors received anywhere but from the cache. Previously
  20460. we would ignore such annotations at first, but cache them to disk
  20461. anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
  20462. - When you're using bridges and your network goes away and your
  20463. bridges get marked as down, recover when you attempt a new socks
  20464. connection (if the network is back), rather than waiting up to an
  20465. hour to try fetching new descriptors for your bridges. Bugfix on
  20466. 0.2.0.3-alpha; fixes bug 1981.
  20467. o Major features:
  20468. - Move to the November 2010 Maxmind GeoLite country db (rather
  20469. than the June 2009 ip-to-country GeoIP db) for our statistics that
  20470. count how many users relays are seeing from each country. Now we'll
  20471. have more accurate data, especially for many African countries.
  20472. o New directory authorities:
  20473. - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
  20474. authority.
  20475. o Minor bugfixes:
  20476. - Fix an assertion failure that could occur in directory caches or
  20477. bridge users when using a very short voting interval on a testing
  20478. network. Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on
  20479. 0.2.0.8-alpha.
  20480. - Enforce multiplicity rules when parsing annotations. Bugfix on
  20481. 0.2.0.8-alpha. Found by piebeer.
  20482. - Allow handshaking OR connections to take a full KeepalivePeriod
  20483. seconds to handshake. Previously, we would close them after
  20484. IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
  20485. were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
  20486. for analysis help.
  20487. - When building with --enable-gcc-warnings on OpenBSD, disable
  20488. warnings in system headers. This makes --enable-gcc-warnings
  20489. pass on OpenBSD 4.8.
  20490. o Minor features:
  20491. - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
  20492. and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
  20493. stream ending reason for this case: END_STREAM_REASON_NOROUTE.
  20494. Servers can start sending this code when enough clients recognize
  20495. it. Bugfix on 0.1.0.1-rc; fixes part of bug 1793.
  20496. - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
  20497. Patch from mingw-san.
  20498. o Removed files:
  20499. - Remove the old debian/ directory from the main Tor distribution.
  20500. The official Tor-for-debian git repository lives at the URL
  20501. https://git.torproject.org/debian/tor.git
  20502. - Stop shipping the old doc/website/ directory in the tarball. We
  20503. changed the website format in late 2010, and what we shipped in
  20504. 0.2.1.26 really wasn't that useful anyway.
  20505. Changes in version 0.2.2.19-alpha - 2010-11-22
  20506. Yet another OpenSSL security patch broke its compatibility with Tor:
  20507. Tor 0.2.2.19-alpha makes relays work with OpenSSL 0.9.8p and 1.0.0.b.
  20508. o Major bugfixes:
  20509. - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
  20510. No longer set the tlsext_host_name extension on server SSL objects;
  20511. but continue to set it on client SSL objects. Our goal in setting
  20512. it was to imitate a browser, not a vhosting server. Fixes bug 2204;
  20513. bugfix on 0.2.1.1-alpha.
  20514. o Minor bugfixes:
  20515. - Try harder not to exceed the maximum length of 50 KB when writing
  20516. statistics to extra-info descriptors. This bug was triggered by very
  20517. fast relays reporting exit-port, entry, and dirreq statistics.
  20518. Reported by Olaf Selke. Bugfix on 0.2.2.1-alpha. Fixes bug 2183.
  20519. - Publish a router descriptor even if generating an extra-info
  20520. descriptor fails. Previously we would not publish a router
  20521. descriptor without an extra-info descriptor; this can cause fast
  20522. exit relays collecting exit-port statistics to drop from the
  20523. consensus. Bugfix on 0.1.2.9-rc; fixes bug 2195.
  20524. Changes in version 0.2.2.18-alpha - 2010-11-16
  20525. Tor 0.2.2.18-alpha fixes several crash bugs that have been nagging
  20526. us lately, makes unpublished bridge relays able to detect their IP
  20527. address, and fixes a wide variety of other bugs to get us much closer
  20528. to a stable release.
  20529. o Major bugfixes:
  20530. - Do even more to reject (and not just ignore) annotations on
  20531. router descriptors received anywhere but from the cache. Previously
  20532. we would ignore such annotations at first, but cache them to disk
  20533. anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
  20534. - Do not log messages to the controller while shrinking buffer
  20535. freelists. Doing so would sometimes make the controller connection
  20536. try to allocate a buffer chunk, which would mess up the internals
  20537. of the freelist and cause an assertion failure. Fixes bug 1125;
  20538. fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
  20539. - Learn our external IP address when we're a relay or bridge, even if
  20540. we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
  20541. where we introduced bridge relays that don't need to publish to
  20542. be useful. Fixes bug 2050.
  20543. - Maintain separate TLS contexts and certificates for incoming and
  20544. outgoing connections in bridge relays. Previously we would use the
  20545. same TLS contexts and certs for incoming and outgoing connections.
  20546. Bugfix on 0.2.0.3-alpha; addresses bug 988.
  20547. - Maintain separate identity keys for incoming and outgoing TLS
  20548. contexts in bridge relays. Previously we would use the same
  20549. identity keys for incoming and outgoing TLS contexts. Bugfix on
  20550. 0.2.0.3-alpha; addresses the other half of bug 988.
  20551. - Avoid an assertion failure when we as an authority receive a
  20552. duplicate upload of a router descriptor that we already have,
  20553. but which we previously considered an obsolete descriptor.
  20554. Fixes another case of bug 1776. Bugfix on 0.2.2.16-alpha.
  20555. - Avoid a crash bug triggered by looking at a dangling pointer while
  20556. setting the network status consensus. Found by Robert Ransom.
  20557. Bugfix on 0.2.2.17-alpha. Fixes bug 2097.
  20558. - Fix a logic error where servers that _didn't_ act as exits would
  20559. try to keep their server lists more aggressively up to date than
  20560. exits, when it was supposed to be the other way around. Bugfix
  20561. on 0.2.2.17-alpha.
  20562. o Minor bugfixes (on Tor 0.2.1.x and earlier):
  20563. - When we're trying to guess whether we know our IP address as
  20564. a relay, we would log various ways that we failed to guess
  20565. our address, but never log that we ended up guessing it
  20566. successfully. Now add a log line to help confused and anxious
  20567. relay operators. Bugfix on 0.1.2.1-alpha; fixes bug 1534.
  20568. - Bring the logic that gathers routerinfos and assesses the
  20569. acceptability of circuits into line. This prevents a Tor OP from
  20570. getting locked in a cycle of choosing its local OR as an exit for a
  20571. path (due to a .exit request) and then rejecting the circuit because
  20572. its OR is not listed yet. It also prevents Tor clients from using an
  20573. OR running in the same instance as an exit (due to a .exit request)
  20574. if the OR does not meet the same requirements expected of an OR
  20575. running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
  20576. - Correctly describe errors that occur when generating a TLS object.
  20577. Previously we would attribute them to a failure while generating a
  20578. TLS context. Patch by Robert Ransom. Bugfix on 0.1.0.4-rc; fixes
  20579. bug 1994.
  20580. - Enforce multiplicity rules when parsing annotations. Bugfix on
  20581. 0.2.0.8-alpha. Found by piebeer.
  20582. - Fix warnings that newer versions of autoconf produced during
  20583. ./autogen.sh. These warnings appear to be harmless in our case,
  20584. but they were extremely verbose. Fixes bug 2020.
  20585. o Minor bugfixes (on Tor 0.2.2.x):
  20586. - Enable protection of small arrays whenever we build with gcc
  20587. hardening features, not only when also building with warnings
  20588. enabled. Fixes bug 2031; bugfix on 0.2.2.14-alpha. Reported by keb.
  20589. o Minor features:
  20590. - Make hidden services work better in private Tor networks by not
  20591. requiring any uptime to join the hidden service descriptor
  20592. DHT. Implements ticket 2088.
  20593. - Rate-limit the "your application is giving Tor only an IP address"
  20594. warning. Addresses bug 2000; bugfix on 0.0.8pre2.
  20595. - When AllowSingleHopExits is set, print a warning to explain to the
  20596. relay operator why most clients are avoiding her relay.
  20597. - Update to the November 1 2010 Maxmind GeoLite Country database.
  20598. o Code simplifications and refactoring:
  20599. - When we fixed bug 1038 we had to put in a restriction not to send
  20600. RELAY_EARLY cells on rend circuits. This was necessary as long
  20601. as relays using Tor 0.2.1.3-alpha through 0.2.1.18-alpha were
  20602. active. Now remove this obsolete check. Resolves bug 2081.
  20603. - Some options used different conventions for uppercasing of acronyms
  20604. when comparing manpage and source. Fix those in favor of the
  20605. manpage, as it makes sense to capitalize acronyms.
  20606. - Remove the torrc.complete file. It hasn't been kept up to date
  20607. and users will have better luck checking out the manpage.
  20608. - Remove the obsolete "NoPublish" option; it has been flagged
  20609. as obsolete and has produced a warning since 0.1.1.18-rc.
  20610. - Remove everything related to building the expert bundle for OS X.
  20611. It has confused many users, doesn't work right on OS X 10.6,
  20612. and is hard to get rid of once installed. Resolves bug 1274.
  20613. Changes in version 0.2.2.17-alpha - 2010-09-30
  20614. Tor 0.2.2.17-alpha introduces a feature to make it harder for clients
  20615. to use one-hop circuits (which can put the exit relays at higher risk,
  20616. plus unbalance the network); fixes a big bug in bandwidth accounting
  20617. for relays that want to limit their monthly bandwidth use; fixes a
  20618. big pile of bugs in how clients tolerate temporary network failure;
  20619. and makes our adaptive circuit build timeout feature (which improves
  20620. client performance if your network is fast while not breaking things
  20621. if your network is slow) better handle bad networks.
  20622. o Major features:
  20623. - Exit relays now try harder to block exit attempts from unknown
  20624. relays, to make it harder for people to use them as one-hop proxies
  20625. a la tortunnel. Controlled by the refuseunknownexits consensus
  20626. parameter (currently enabled), or you can override it on your
  20627. relay with the RefuseUnknownExits torrc option. Resolves bug 1751.
  20628. o Major bugfixes (0.2.1.x and earlier):
  20629. - Fix a bug in bandwidth accounting that could make us use twice
  20630. the intended bandwidth when our interval start changes due to
  20631. daylight saving time. Now we tolerate skew in stored vs computed
  20632. interval starts: if the start of the period changes by no more than
  20633. 50% of the period's duration, we remember bytes that we transferred
  20634. in the old period. Fixes bug 1511; bugfix on 0.0.9pre5.
  20635. - Always search the Windows system directory for system DLLs, and
  20636. nowhere else. Bugfix on 0.1.1.23; fixes bug 1954.
  20637. - When you're using bridges and your network goes away and your
  20638. bridges get marked as down, recover when you attempt a new socks
  20639. connection (if the network is back), rather than waiting up to an
  20640. hour to try fetching new descriptors for your bridges. Bugfix on
  20641. 0.2.0.3-alpha; fixes bug 1981.
  20642. o Major bugfixes (on 0.2.2.x):
  20643. - Fix compilation on Windows. Bugfix on 0.2.2.16-alpha; related to
  20644. bug 1797.
  20645. - Fix a segfault that could happen when operating a bridge relay with
  20646. no GeoIP database set. Fixes bug 1964; bugfix on 0.2.2.15-alpha.
  20647. - The consensus bandwidth-weights (used by clients to choose fast
  20648. relays) entered an unexpected edge case in September where
  20649. Exits were much scarcer than Guards, resulting in bad weight
  20650. recommendations. Now we compute them using new constraints that
  20651. should succeed in all cases. Also alter directory authorities to
  20652. not include the bandwidth-weights line if they fail to produce
  20653. valid values. Fixes bug 1952; bugfix on 0.2.2.10-alpha.
  20654. - When weighting bridges during path selection, we used to trust
  20655. the bandwidths they provided in their descriptor, only capping them
  20656. at 10MB/s. This turned out to be problematic for two reasons:
  20657. Bridges could claim to handle a lot more traffic then they
  20658. actually would, thus making more clients pick them and have a
  20659. pretty effective DoS attack. The other issue is that new bridges
  20660. that might not have a good estimate for their bw capacity yet
  20661. would not get used at all unless no other bridges are available
  20662. to a client. Fixes bug 1912; bugfix on 0.2.2.7-alpha.
  20663. o Major bugfixes (on the circuit build timeout feature, 0.2.2.x):
  20664. - Ignore cannibalized circuits when recording circuit build times.
  20665. This should provide for a minor performance improvement for hidden
  20666. service users using 0.2.2.14-alpha, and should remove two spurious
  20667. notice log messages. Bugfix on 0.2.2.14-alpha; fixes bug 1740.
  20668. - Simplify the logic that causes us to decide if the network is
  20669. unavailable for purposes of recording circuit build times. If we
  20670. receive no cells whatsoever for the entire duration of a circuit's
  20671. full measured lifetime, the network is probably down. Also ignore
  20672. one-hop directory fetching circuit timeouts when calculating our
  20673. circuit build times. These changes should hopefully reduce the
  20674. cases where we see ridiculous circuit build timeouts for people
  20675. with spotty wireless connections. Fixes part of bug 1772; bugfix
  20676. on 0.2.2.2-alpha.
  20677. - Prevent the circuit build timeout from becoming larger than
  20678. the maximum build time we have ever seen. Also, prevent the time
  20679. period for measurement circuits from becoming larger than twice that
  20680. value. Fixes the other part of bug 1772; bugfix on 0.2.2.2-alpha.
  20681. o Minor features:
  20682. - When we run out of directory information such that we can't build
  20683. circuits, but then get enough that we can build circuits, log when
  20684. we actually construct a circuit, so the user has a better chance of
  20685. knowing what's going on. Fixes bug 1362.
  20686. - Be more generous with how much bandwidth we'd use up (with
  20687. accounting enabled) before entering "soft hibernation". Previously,
  20688. we'd refuse new connections and circuits once we'd used up 95% of
  20689. our allotment. Now, we use up 95% of our allotment, AND make sure
  20690. that we have no more than 500MB (or 3 hours of expected traffic,
  20691. whichever is lower) remaining before we enter soft hibernation.
  20692. - If we've configured EntryNodes and our network goes away and/or all
  20693. our entrynodes get marked down, optimistically retry them all when
  20694. a new socks application request appears. Fixes bug 1882.
  20695. - Add some more defensive programming for architectures that can't
  20696. handle unaligned integer accesses. We don't know of any actual bugs
  20697. right now, but that's the best time to fix them. Fixes bug 1943.
  20698. - Support line continuations in the torrc config file. If a line
  20699. ends with a single backslash character, the newline is ignored, and
  20700. the configuration value is treated as continuing on the next line.
  20701. Resolves bug 1929.
  20702. o Minor bugfixes (on 0.2.1.x and earlier):
  20703. - For bandwidth accounting, calculate our expected bandwidth rate
  20704. based on the time during which we were active and not in
  20705. soft-hibernation during the last interval. Previously, we were
  20706. also considering the time spent in soft-hibernation. If this
  20707. was a long time, we would wind up underestimating our bandwidth
  20708. by a lot, and skewing our wakeup time towards the start of the
  20709. accounting interval. Fixes bug 1789. Bugfix on 0.0.9pre5.
  20710. o Minor bugfixes (on 0.2.2.x):
  20711. - Resume generating CIRC FAILED REASON=TIMEOUT control port messages,
  20712. which were disabled by the circuit build timeout changes in
  20713. 0.2.2.14-alpha. Bugfix on 0.2.2.14-alpha; fixes bug 1739.
  20714. - Make sure we don't warn about missing bandwidth weights when
  20715. choosing bridges or other relays not in the consensus. Bugfix on
  20716. 0.2.2.10-alpha; fixes bug 1805.
  20717. - In our logs, do not double-report signatures from unrecognized
  20718. authorities both as "from unknown authority" and "not
  20719. present". Fixes bug 1956, bugfix on 0.2.2.16-alpha.
  20720. Changes in version 0.2.2.16-alpha - 2010-09-17
  20721. Tor 0.2.2.16-alpha fixes a variety of old stream fairness bugs (most
  20722. evident at exit relays), and also continues to resolve all the little
  20723. bugs that have been filling up trac lately.
  20724. o Major bugfixes (stream-level fairness):
  20725. - When receiving a circuit-level SENDME for a blocked circuit, try
  20726. to package cells fairly from all the streams that had previously
  20727. been blocked on that circuit. Previously, we had started with the
  20728. oldest stream, and allowed each stream to potentially exhaust
  20729. the circuit's package window. This gave older streams on any
  20730. given circuit priority over newer ones. Fixes bug 1937. Detected
  20731. originally by Camilo Viecco. This bug was introduced before the
  20732. first Tor release, in svn commit r152: it is the new winner of
  20733. the longest-lived bug prize.
  20734. - When the exit relay got a circuit-level sendme cell, it started
  20735. reading on the exit streams, even if had 500 cells queued in the
  20736. circuit queue already, so the circuit queue just grew and grew in
  20737. some cases. We fix this by not re-enabling reading on receipt of a
  20738. sendme cell when the cell queue is blocked. Fixes bug 1653. Bugfix
  20739. on 0.2.0.1-alpha. Detected by Mashael AlSabah. Original patch by
  20740. "yetonetime".
  20741. - Newly created streams were allowed to read cells onto circuits,
  20742. even if the circuit's cell queue was blocked and waiting to drain.
  20743. This created potential unfairness, as older streams would be
  20744. blocked, but newer streams would gladly fill the queue completely.
  20745. We add code to detect this situation and prevent any stream from
  20746. getting more than one free cell. Bugfix on 0.2.0.1-alpha. Partially
  20747. fixes bug 1298.
  20748. o Minor features:
  20749. - Update to the September 1 2010 Maxmind GeoLite Country database.
  20750. - Warn when CookieAuthFileGroupReadable is set but CookieAuthFile is
  20751. not. This would lead to a cookie that is still not group readable.
  20752. Closes bug 1843. Suggested by katmagic.
  20753. - When logging a rate-limited warning, we now mention how many messages
  20754. got suppressed since the last warning.
  20755. - Add new "perconnbwrate" and "perconnbwburst" consensus params to
  20756. do individual connection-level rate limiting of clients. The torrc
  20757. config options with the same names trump the consensus params, if
  20758. both are present. Replaces the old "bwconnrate" and "bwconnburst"
  20759. consensus params which were broken from 0.2.2.7-alpha through
  20760. 0.2.2.14-alpha. Closes bug 1947.
  20761. - When a router changes IP address or port, authorities now launch
  20762. a new reachability test for it. Implements ticket 1899.
  20763. - Make the formerly ugly "2 unknown, 7 missing key, 0 good, 0 bad,
  20764. 2 no signature, 4 required" messages about consensus signatures
  20765. easier to read, and make sure they get logged at the same severity
  20766. as the messages explaining which keys are which. Fixes bug 1290.
  20767. - Don't warn when we have a consensus that we can't verify because
  20768. of missing certificates, unless those certificates are ones
  20769. that we have been trying and failing to download. Fixes bug 1145.
  20770. - If you configure your bridge with a known identity fingerprint,
  20771. and the bridge authority is unreachable (as it is in at least
  20772. one country now), fall back to directly requesting the descriptor
  20773. from the bridge. Finishes the feature started in 0.2.0.10-alpha;
  20774. closes bug 1138.
  20775. - When building with --enable-gcc-warnings on OpenBSD, disable
  20776. warnings in system headers. This makes --enable-gcc-warnings
  20777. pass on OpenBSD 4.8.
  20778. o Minor bugfixes (on 0.2.1.x and earlier):
  20779. - Authorities will now attempt to download consensuses if their
  20780. own efforts to make a live consensus have failed. This change
  20781. means authorities that restart will fetch a valid consensus, and
  20782. it means authorities that didn't agree with the current consensus
  20783. will still fetch and serve it if it has enough signatures. Bugfix
  20784. on 0.2.0.9-alpha; fixes bug 1300.
  20785. - Ensure DNS requests launched by "RESOLVE" commands from the
  20786. controller respect the __LeaveStreamsUnattached setconf options. The
  20787. same goes for requests launched via DNSPort or transparent
  20788. proxying. Bugfix on 0.2.0.1-alpha; fixes bug 1525.
  20789. - Allow handshaking OR connections to take a full KeepalivePeriod
  20790. seconds to handshake. Previously, we would close them after
  20791. IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
  20792. were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
  20793. for analysis help.
  20794. - Rate-limit "Failed to hand off onionskin" warnings.
  20795. - Never relay a cell for a circuit we have already destroyed.
  20796. Between marking a circuit as closeable and finally closing it,
  20797. it may have been possible for a few queued cells to get relayed,
  20798. even though they would have been immediately dropped by the next
  20799. OR in the circuit. Fixes bug 1184; bugfix on 0.2.0.1-alpha.
  20800. - Never queue a cell for a circuit that's already been marked
  20801. for close.
  20802. - Never vote for a server as "Running" if we have a descriptor for
  20803. it claiming to be hibernating, and that descriptor was published
  20804. more recently than our last contact with the server. Bugfix on
  20805. 0.2.0.3-alpha; fixes bug 911.
  20806. - Squash a compile warning on OpenBSD. Reported by Tas; fixes
  20807. bug 1848.
  20808. o Minor bugfixes (on 0.2.2.x):
  20809. - Fix a regression introduced in 0.2.2.7-alpha that marked relays
  20810. down if a directory fetch fails and you've configured either
  20811. bridges or EntryNodes. The intent was to mark the relay as down
  20812. _unless_ you're using bridges or EntryNodes, since if you are
  20813. then you could quickly run out of entry points.
  20814. - Fix the Windows directory-listing code. A bug introduced in
  20815. 0.2.2.14-alpha could make Windows directory servers forget to load
  20816. some of their cached v2 networkstatus files.
  20817. - Really allow clients to use relays as bridges. Fixes bug 1776;
  20818. bugfix on 0.2.2.15-alpha.
  20819. - Demote a warn to info that happens when the CellStatistics option
  20820. was just enabled. Bugfix on 0.2.2.15-alpha; fixes bug 1921.
  20821. Reported by Moritz Bartl.
  20822. - On Windows, build correctly either with or without Unicode support.
  20823. This is necessary so that Tor can support fringe platforms like
  20824. Windows 98 (which has no Unicode), or Windows CE (which has no
  20825. non-Unicode). Bugfix on 0.2.2.14-alpha; fixes bug 1797.
  20826. o Testing
  20827. - Add a unit test for cross-platform directory-listing code.
  20828. Changes in version 0.2.2.15-alpha - 2010-08-18
  20829. Tor 0.2.2.15-alpha fixes a big bug in hidden service availability,
  20830. fixes a variety of other bugs that were preventing performance
  20831. experiments from moving forward, fixes several bothersome memory leaks,
  20832. and generally closes a lot of smaller bugs that have been filling up
  20833. trac lately.
  20834. o Major bugfixes:
  20835. - Stop assigning the HSDir flag to relays that disable their
  20836. DirPort (and thus will refuse to answer directory requests). This
  20837. fix should dramatically improve the reachability of hidden services:
  20838. hidden services and hidden service clients pick six HSDir relays
  20839. to store and retrieve the hidden service descriptor, and currently
  20840. about half of the HSDir relays will refuse to work. Bugfix on
  20841. 0.2.0.10-alpha; fixes part of bug 1693.
  20842. - The PerConnBWRate and Burst config options, along with the
  20843. bwconnrate and bwconnburst consensus params, initialized each conn's
  20844. token bucket values only when the connection is established. Now we
  20845. update them if the config options change, and update them every time
  20846. we get a new consensus. Otherwise we can encounter an ugly edge
  20847. case where we initialize an OR conn to client-level bandwidth,
  20848. but then later the relay joins the consensus and we leave it
  20849. throttled. Bugfix on 0.2.2.7-alpha; fixes bug 1830.
  20850. - Fix a regression that caused Tor to rebind its ports if it receives
  20851. SIGHUP while hibernating. Bugfix in 0.1.1.6-alpha; closes bug 919.
  20852. o Major features:
  20853. - Lower the maximum weighted-fractional-uptime cutoff to 98%. This
  20854. should give us approximately 40-50% more Guard-flagged nodes,
  20855. improving the anonymity the Tor network can provide and also
  20856. decreasing the dropoff in throughput that relays experience when
  20857. they first get the Guard flag.
  20858. - Allow enabling or disabling the *Statistics config options while
  20859. Tor is running.
  20860. o Minor features:
  20861. - Update to the August 1 2010 Maxmind GeoLite Country database.
  20862. - Have the controller interface give a more useful message than
  20863. "Internal Error" in response to failed GETINFO requests.
  20864. - Warn when the same option is provided more than once in a torrc
  20865. file, on the command line, or in a single SETCONF statement, and
  20866. the option is one that only accepts a single line. Closes bug 1384.
  20867. - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
  20868. Patch from mingw-san.
  20869. - Add support for the country code "{??}" in torrc options like
  20870. ExcludeNodes, to indicate all routers of unknown country. Closes
  20871. bug 1094.
  20872. - Relays report the number of bytes spent on answering directory
  20873. requests in extra-info descriptors similar to {read,write}-history.
  20874. Implements enhancement 1790.
  20875. o Minor bugfixes (on 0.2.1.x and earlier):
  20876. - Complain if PublishServerDescriptor is given multiple arguments that
  20877. include 0 or 1. This configuration will be rejected in the future.
  20878. Bugfix on 0.2.0.1-alpha; closes bug 1107.
  20879. - Disallow BridgeRelay 1 and ORPort 0 at once in the configuration.
  20880. Bugfix on 0.2.0.13-alpha; closes bug 928.
  20881. - Change "Application request when we're believed to be offline."
  20882. notice to "Application request when we haven't used client
  20883. functionality lately.", to clarify that it's not an error. Bugfix
  20884. on 0.0.9.3; fixes bug 1222.
  20885. - Fix a bug in the controller interface where "GETINFO ns/asdaskljkl"
  20886. would return "551 Internal error" rather than "552 Unrecognized key
  20887. ns/asdaskljkl". Bugfix on 0.1.2.3-alpha.
  20888. - Users can't configure a regular relay to be their bridge. It didn't
  20889. work because when Tor fetched the bridge descriptor, it found
  20890. that it already had it, and didn't realize that the purpose of the
  20891. descriptor had changed. Now we replace routers with a purpose other
  20892. than bridge with bridge descriptors when fetching them. Bugfix on
  20893. 0.1.1.9-alpha. Bug 1776 not yet fixed because now we immediately
  20894. refetch the descriptor with router purpose 'general', disabling
  20895. it as a bridge.
  20896. - Fix a rare bug in rend_fn unit tests: we would fail a test when
  20897. a randomly generated port is 0. Diagnosed by Matt Edman. Bugfix
  20898. on 0.2.0.10-alpha; fixes bug 1808.
  20899. - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
  20900. and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
  20901. stream ending reason for this case: END_STREAM_REASON_NOROUTE.
  20902. Servers can start sending this code when enough clients recognize
  20903. it. Also update the spec to reflect this new reason. Bugfix on
  20904. 0.1.0.1-rc; fixes part of bug 1793.
  20905. - Delay geoip stats collection by bridges for 6 hours, not 2 hours,
  20906. when we switch from being a public relay to a bridge. Otherwise
  20907. there will still be clients that see the relay in their consensus,
  20908. and the stats will end up wrong. Bugfix on 0.2.1.15-rc; fixes bug
  20909. 932 even more.
  20910. - Instead of giving an assertion failure on an internal mismatch
  20911. on estimated freelist size, just log a BUG warning and try later.
  20912. Mitigates but does not fix bug 1125.
  20913. - Fix an assertion failure that could occur in caches or bridge users
  20914. when using a very short voting interval on a testing network.
  20915. Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on 0.2.0.8-alpha.
  20916. o Minor bugfixes (on 0.2.2.x):
  20917. - Alter directory authorities to always consider Exit-flagged nodes
  20918. as potential Guard nodes in their votes. The actual decision to
  20919. use Exits as Guards is done in the consensus bandwidth weights.
  20920. Fixes bug 1294; bugfix on 0.2.2.10-alpha.
  20921. - When the controller is reporting the purpose of circuits that
  20922. didn't finish building before the circuit build timeout, it was
  20923. printing UNKNOWN_13. Now print EXPIRED. Bugfix on 0.2.2.14-alpha.
  20924. - Our libevent version parsing code couldn't handle versions like
  20925. 1.4.14b-stable and incorrectly warned the user about using an
  20926. old and broken version of libevent. Treat 1.4.14b-stable like
  20927. 1.4.14-stable when parsing the version. Fixes bug 1731; bugfix
  20928. on 0.2.2.1-alpha.
  20929. - Don't use substitution references like $(VAR:MOD) when
  20930. $(asciidoc_files) is empty -- make(1) on NetBSD transforms
  20931. '$(:x)' to 'x' rather than the empty string. This bites us in
  20932. doc/ when configured with --disable-asciidoc. Bugfix on
  20933. 0.2.2.9-alpha; fixes bug 1773.
  20934. - Remove a spurious hidden service server-side log notice about
  20935. "Ancient non-dirty circuits". Bugfix on 0.2.2.14-alpha; fixes
  20936. bug 1741.
  20937. - Fix compilation with --with-dmalloc set. Bugfix on 0.2.2.6-alpha;
  20938. fixes bug 1832.
  20939. - Correctly report written bytes on linked connections. Found while
  20940. implementing 1790. Bugfix on 0.2.2.4-alpha.
  20941. - Fix three memory leaks: one in circuit_build_times_parse_state(),
  20942. one in dirvote_add_signatures_to_pending_consensus(), and one every
  20943. time we parse a v3 network consensus. Bugfixes on 0.2.2.14-alpha,
  20944. 0.2.2.6-alpha, and 0.2.2.10-alpha respectively; fixes bug 1831.
  20945. o Code simplifications and refactoring:
  20946. - Take a first step towards making or.h smaller by splitting out
  20947. function definitions for all source files in src/or/. Leave
  20948. structures and defines in or.h for now.
  20949. - Remove a bunch of unused function declarations as well as a block of
  20950. #if 0'd code from the unit tests. Closes bug 1824.
  20951. - New unit tests for exit-port history statistics; refactored exit
  20952. statistics code to be more easily tested.
  20953. - Remove the old debian/ directory from the main Tor distribution.
  20954. The official Tor-for-debian git repository lives at the URL
  20955. https://git.torproject.org/debian/tor.git
  20956. Changes in version 0.2.2.14-alpha - 2010-07-12
  20957. Tor 0.2.2.14-alpha greatly improves client-side handling of
  20958. circuit build timeouts, which are used to estimate speed and improve
  20959. performance. We also move to a much better GeoIP database, port Tor to
  20960. Windows CE, introduce new compile flags that improve code security,
  20961. add an eighth v3 directory authority, and address a lot of more
  20962. minor issues.
  20963. o Major bugfixes:
  20964. - Tor directory authorities no longer crash when started with a
  20965. cached-microdesc-consensus file in their data directory. Bugfix
  20966. on 0.2.2.6-alpha; fixes bug 1532.
  20967. - Treat an unset $HOME like an empty $HOME rather than triggering an
  20968. assert. Bugfix on 0.0.8pre1; fixes bug 1522.
  20969. - Ignore negative and large circuit build timeout values that can
  20970. happen during a suspend or hibernate. These values caused various
  20971. asserts to fire. Bugfix on 0.2.2.2-alpha; fixes bug 1245.
  20972. - Alter calculation of Pareto distribution parameter 'Xm' for
  20973. Circuit Build Timeout learning to use the weighted average of the
  20974. top N=3 modes (because we have three entry guards). Considering
  20975. multiple modes should improve the timeout calculation in some cases,
  20976. and prevent extremely high timeout values. Bugfix on 0.2.2.2-alpha;
  20977. fixes bug 1335.
  20978. - Alter calculation of Pareto distribution parameter 'Alpha' to use a
  20979. right censored distribution model. This approach improves over the
  20980. synthetic timeout generation approach that was producing insanely
  20981. high timeout values. Now we calculate build timeouts using truncated
  20982. times. Bugfix on 0.2.2.2-alpha; fixes bugs 1245 and 1335.
  20983. - Do not close circuits that are under construction when they reach
  20984. the circuit build timeout. Instead, leave them building (but do not
  20985. use them) for up until the time corresponding to the 95th percentile
  20986. on the Pareto CDF or 60 seconds, whichever is greater. This is done
  20987. to provide better data for the new Pareto model. This percentile
  20988. can be controlled by the consensus.
  20989. o Major features:
  20990. - Move to the June 2010 Maxmind GeoLite country db (rather than the
  20991. June 2009 ip-to-country GeoIP db) for our statistics that count
  20992. how many users relays are seeing from each country. Now we have
  20993. more accurate data for many African countries.
  20994. - Port Tor to build and run correctly on Windows CE systems, using
  20995. the wcecompat library. Contributed by Valerio Lupi.
  20996. - New "--enable-gcc-hardening" ./configure flag (off by default)
  20997. to turn on gcc compile time hardening options. It ensures
  20998. that signed ints have defined behavior (-fwrapv), enables
  20999. -D_FORTIFY_SOURCE=2 (requiring -O2), adds stack smashing protection
  21000. with canaries (-fstack-protector-all), turns on ASLR protection if
  21001. supported by the kernel (-fPIE, -pie), and adds additional security
  21002. related warnings. Verified to work on Mac OS X and Debian Lenny.
  21003. - New "--enable-linker-hardening" ./configure flag (off by default)
  21004. to turn on ELF specific hardening features (relro, now). This does
  21005. not work with Mac OS X or any other non-ELF binary format.
  21006. o New directory authorities:
  21007. - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
  21008. authority.
  21009. o Minor features:
  21010. - New config option "WarnUnsafeSocks 0" disables the warning that
  21011. occurs whenever Tor receives a socks handshake using a version of
  21012. the socks protocol that can only provide an IP address (rather
  21013. than a hostname). Setups that do DNS locally over Tor are fine,
  21014. and we shouldn't spam the logs in that case.
  21015. - Convert the HACKING file to asciidoc, and add a few new sections
  21016. to it, explaining how we use Git, how we make changelogs, and
  21017. what should go in a patch.
  21018. - Add a TIMEOUT_RATE keyword to the BUILDTIMEOUT_SET control port
  21019. event, to give information on the current rate of circuit timeouts
  21020. over our stored history.
  21021. - Add ability to disable circuit build time learning via consensus
  21022. parameter and via a LearnCircuitBuildTimeout config option. Also
  21023. automatically disable circuit build time calculation if we are
  21024. either a AuthoritativeDirectory, or if we fail to write our state
  21025. file. Fixes bug 1296.
  21026. - More gracefully handle corrupt state files, removing asserts
  21027. in favor of saving a backup and resetting state.
  21028. - Rename the "log.h" header to "torlog.h" so as to conflict with fewer
  21029. system headers.
  21030. o Minor bugfixes:
  21031. - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
  21032. enabled.
  21033. - When a2x fails, mention that the user could disable manpages instead
  21034. of trying to fix their asciidoc installation.
  21035. - Where available, use Libevent 2.0's periodic timers so that our
  21036. once-per-second cleanup code gets called even more closely to
  21037. once per second than it would otherwise. Fixes bug 943.
  21038. - If you run a bridge that listens on multiple IP addresses, and
  21039. some user configures a bridge address that uses a different IP
  21040. address than your bridge writes in its router descriptor, and the
  21041. user doesn't specify an identity key, their Tor would discard the
  21042. descriptor because "it isn't one of our configured bridges", and
  21043. fail to bootstrap. Now believe the descriptor and bootstrap anyway.
  21044. Bugfix on 0.2.0.3-alpha.
  21045. - If OpenSSL fails to make a duplicate of a private or public key, log
  21046. an error message and try to exit cleanly. May help with debugging
  21047. if bug 1209 ever remanifests.
  21048. - Save a couple bytes in memory allocation every time we escape
  21049. certain characters in a string. Patch from Florian Zumbiehl.
  21050. - Make it explicit that we don't cannibalize one-hop circuits. This
  21051. happens in the wild, but doesn't turn out to be a problem because
  21052. we fortunately don't use those circuits. Many thanks to outofwords
  21053. for the initial analysis and to swissknife who confirmed that
  21054. two-hop circuits are actually created.
  21055. - Make directory mirrors report non-zero dirreq-v[23]-shares again.
  21056. Fixes bug 1564; bugfix on 0.2.2.9-alpha.
  21057. - Eliminate a case where a circuit build time warning was displayed
  21058. after network connectivity resumed. Bugfix on 0.2.2.2-alpha.
  21059. Changes in version 0.2.1.26 - 2010-05-02
  21060. Tor 0.2.1.26 addresses the recent connection and memory overload
  21061. problems we've been seeing on relays, especially relays with their
  21062. DirPort open. If your relay has been crashing, or you turned it off
  21063. because it used too many resources, give this release a try.
  21064. This release also fixes yet another instance of broken OpenSSL libraries
  21065. that was causing some relays to drop out of the consensus.
  21066. o Major bugfixes:
  21067. - Teach relays to defend themselves from connection overload. Relays
  21068. now close idle circuits early if it looks like they were intended
  21069. for directory fetches. Relays are also more aggressive about closing
  21070. TLS connections that have no circuits on them. Such circuits are
  21071. unlikely to be re-used, and tens of thousands of them were piling
  21072. up at the fast relays, causing the relays to run out of sockets
  21073. and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
  21074. their directory fetches over TLS).
  21075. - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
  21076. that claim to be earlier than 0.9.8m, but which have in reality
  21077. backported huge swaths of 0.9.8m or 0.9.8n renegotiation
  21078. behavior. Possible fix for some cases of bug 1346.
  21079. - Directory mirrors were fetching relay descriptors only from v2
  21080. directory authorities, rather than v3 authorities like they should.
  21081. Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
  21082. to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
  21083. o Minor bugfixes:
  21084. - Finally get rid of the deprecated and now harmful notion of "clique
  21085. mode", where directory authorities maintain TLS connections to
  21086. every other relay.
  21087. o Testsuite fixes:
  21088. - In the util/threads test, no longer free the test_mutex before all
  21089. worker threads have finished. Bugfix on 0.2.1.6-alpha.
  21090. - The master thread could starve the worker threads quite badly on
  21091. certain systems, causing them to run only partially in the allowed
  21092. window. This resulted in test failures. Now the master thread sleeps
  21093. occasionally for a few microseconds while the two worker-threads
  21094. compete for the mutex. Bugfix on 0.2.0.1-alpha.
  21095. Changes in version 0.2.2.13-alpha - 2010-04-24
  21096. Tor 0.2.2.13-alpha addresses the recent connection and memory overload
  21097. problems we've been seeing on relays, especially relays with their
  21098. DirPort open. If your relay has been crashing, or you turned it off
  21099. because it used too many resources, give this release a try.
  21100. o Major bugfixes:
  21101. - Teach relays to defend themselves from connection overload. Relays
  21102. now close idle circuits early if it looks like they were intended
  21103. for directory fetches. Relays are also more aggressive about closing
  21104. TLS connections that have no circuits on them. Such circuits are
  21105. unlikely to be re-used, and tens of thousands of them were piling
  21106. up at the fast relays, causing the relays to run out of sockets
  21107. and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
  21108. their directory fetches over TLS).
  21109. o Minor features:
  21110. - Finally get rid of the deprecated and now harmful notion of "clique
  21111. mode", where directory authorities maintain TLS connections to
  21112. every other relay.
  21113. - Directory authorities now do an immediate reachability check as soon
  21114. as they hear about a new relay. This change should slightly reduce
  21115. the time between setting up a relay and getting listed as running
  21116. in the consensus. It should also improve the time between setting
  21117. up a bridge and seeing use by bridge users.
  21118. - Directory authorities no longer launch a TLS connection to every
  21119. relay as they startup. Now that we have 2k+ descriptors cached,
  21120. the resulting network hiccup is becoming a burden. Besides,
  21121. authorities already avoid voting about Running for the first half
  21122. hour of their uptime.
  21123. Changes in version 0.2.2.12-alpha - 2010-04-20
  21124. Tor 0.2.2.12-alpha fixes a critical bug in how directory authorities
  21125. handle and vote on descriptors. It was causing relays to drop out of
  21126. the consensus.
  21127. o Major bugfixes:
  21128. - Many relays have been falling out of the consensus lately because
  21129. not enough authorities know about their descriptor for them to get
  21130. a majority of votes. When we deprecated the v2 directory protocol,
  21131. we got rid of the only way that v3 authorities can hear from each
  21132. other about other descriptors. Now authorities examine every v3
  21133. vote for new descriptors, and fetch them from that authority. Bugfix
  21134. on 0.2.1.23.
  21135. - Fix two typos in tor_vasprintf() that broke the compile on Windows,
  21136. and a warning in or.h related to bandwidth_weight_rule_t that
  21137. prevented clean compile on OS X. Fixes bug 1363; bugfix on
  21138. 0.2.2.11-alpha.
  21139. - Fix a segfault on relays when DirReqStatistics is enabled
  21140. and 24 hours pass. Bug found by keb. Fixes bug 1365; bugfix on
  21141. 0.2.2.11-alpha.
  21142. o Minor bugfixes:
  21143. - Demote a confusing TLS warning that relay operators might get when
  21144. someone tries to talk to their OrPort. It is neither the operator's
  21145. fault nor can they do anything about it. Fixes bug 1364; bugfix
  21146. on 0.2.0.14-alpha.
  21147. Changes in version 0.2.2.11-alpha - 2010-04-15
  21148. Tor 0.2.2.11-alpha fixes yet another instance of broken OpenSSL
  21149. libraries that was causing some relays to drop out of the consensus.
  21150. o Major bugfixes:
  21151. - Directory mirrors were fetching relay descriptors only from v2
  21152. directory authorities, rather than v3 authorities like they should.
  21153. Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
  21154. to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
  21155. - Fix a parsing error that made every possible value of
  21156. CircPriorityHalflifeMsec get treated as "1 msec". Bugfix
  21157. on 0.2.2.7-alpha. Rename CircPriorityHalflifeMsec to
  21158. CircuitPriorityHalflifeMsec, so authorities can tell newer relays
  21159. about the option without breaking older ones.
  21160. - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
  21161. that claim to be earlier than 0.9.8m, but which have in reality
  21162. backported huge swaths of 0.9.8m or 0.9.8n renegotiation
  21163. behavior. Possible fix for some cases of bug 1346.
  21164. o Minor features:
  21165. - Experiment with a more aggressive approach to preventing clients
  21166. from making one-hop exit streams. Exit relays who want to try it
  21167. out can set "RefuseUnknownExits 1" in their torrc, and then look
  21168. for "Attempt by %s to open a stream" log messages. Let us know
  21169. how it goes!
  21170. - Add support for statically linking zlib by specifying
  21171. --enable-static-zlib, to go with our support for statically linking
  21172. openssl and libevent. Resolves bug 1358.
  21173. o Minor bugfixes:
  21174. - Fix a segfault that happens whenever a Tor client that is using
  21175. libevent2's bufferevents gets a hup signal. Bugfix on 0.2.2.5-alpha;
  21176. fixes bug 1341.
  21177. - When we cleaned up the contrib/tor-exit-notice.html file, we left
  21178. out the first line. Fixes bug 1295.
  21179. - When building the manpage from a tarball, we required asciidoc, but
  21180. the asciidoc -> roff/html conversion was already done for the
  21181. tarball. Make 'make' complain only when we need asciidoc (either
  21182. because we're compiling directly from git, or because we altered
  21183. the asciidoc manpage in the tarball). Bugfix on 0.2.2.9-alpha.
  21184. - When none of the directory authorities vote on any params, Tor
  21185. segfaulted when trying to make the consensus from the votes. We
  21186. didn't trigger the bug in practice, because authorities do include
  21187. params in their votes. Bugfix on 0.2.2.10-alpha; fixes bug 1322.
  21188. o Testsuite fixes:
  21189. - In the util/threads test, no longer free the test_mutex before all
  21190. worker threads have finished. Bugfix on 0.2.1.6-alpha.
  21191. - The master thread could starve the worker threads quite badly on
  21192. certain systems, causing them to run only partially in the allowed
  21193. window. This resulted in test failures. Now the master thread sleeps
  21194. occasionally for a few microseconds while the two worker-threads
  21195. compete for the mutex. Bugfix on 0.2.0.1-alpha.
  21196. Changes in version 0.2.2.10-alpha - 2010-03-07
  21197. Tor 0.2.2.10-alpha fixes a regression introduced in 0.2.2.9-alpha that
  21198. could prevent relays from guessing their IP address correctly. It also
  21199. starts the groundwork for another client-side performance boost, since
  21200. currently we're not making efficient use of relays that have both the
  21201. Guard flag and the Exit flag.
  21202. o Major bugfixes:
  21203. - Fix a regression from our patch for bug 1244 that caused relays
  21204. to guess their IP address incorrectly if they didn't set Address
  21205. in their torrc and/or their address fails to resolve. Bugfix on
  21206. 0.2.2.9-alpha; fixes bug 1269.
  21207. o Major features (performance):
  21208. - Directory authorities now compute consensus weightings that instruct
  21209. clients how to weight relays flagged as Guard, Exit, Guard+Exit,
  21210. and no flag. Clients that use these weightings will distribute
  21211. network load more evenly across these different relay types. The
  21212. weightings are in the consensus so we can change them globally in
  21213. the future. Extra thanks to "outofwords" for finding some nasty
  21214. security bugs in the first implementation of this feature.
  21215. o Minor features (performance):
  21216. - Always perform router selections using weighted relay bandwidth,
  21217. even if we don't need a high capacity circuit at the time. Non-fast
  21218. circuits now only differ from fast ones in that they can use relays
  21219. not marked with the Fast flag. This "feature" could turn out to
  21220. be a horrible bug; we should investigate more before it goes into
  21221. a stable release.
  21222. o Minor features:
  21223. - Allow disabling building of the manpages. Skipping the manpage
  21224. speeds up the build considerably.
  21225. o Minor bugfixes (on 0.2.2.x):
  21226. - Fix a memleak in the EXTENDCIRCUIT logic. Spotted by coverity.
  21227. Bugfix on 0.2.2.9-alpha.
  21228. - Disallow values larger than INT32_MAX for PerConnBWRate|Burst
  21229. config option. Bugfix on 0.2.2.7-alpha.
  21230. - Ship the asciidoc-helper file in the tarball, so that people can
  21231. build from source if they want to, and touching the .1.txt files
  21232. doesn't break the build. Bugfix on 0.2.2.9-alpha.
  21233. o Minor bugfixes (on 0.2.1.x or earlier):
  21234. - Fix a dereference-then-NULL-check sequence when publishing
  21235. descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
  21236. bug 1255.
  21237. - Fix another dereference-then-NULL-check sequence. Bugfix on
  21238. 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
  21239. - Make sure we treat potentially not NUL-terminated strings correctly.
  21240. Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
  21241. o Code simplifications and refactoring:
  21242. - Fix some urls in the exit notice file and make it XHTML1.1 strict
  21243. compliant. Based on a patch from Christian Kujau.
  21244. - Don't use sed in asciidoc-helper anymore.
  21245. - Make the build process fail if asciidoc cannot be found and
  21246. building with asciidoc isn't disabled.
  21247. Changes in version 0.2.2.9-alpha - 2010-02-22
  21248. Tor 0.2.2.9-alpha makes Tor work again on the latest OS X, updates the
  21249. location of a directory authority, and cleans up a bunch of small bugs.
  21250. o Directory authority changes:
  21251. - Change IP address for dannenberg (v3 directory authority), and
  21252. remove moria2 (obsolete v1, v2 directory authority and v0 hidden
  21253. service directory authority) from the list.
  21254. o Major bugfixes:
  21255. - Make Tor work again on the latest OS X: when deciding whether to
  21256. use strange flags to turn TLS renegotiation on, detect the OpenSSL
  21257. version at run-time, not compile time. We need to do this because
  21258. Apple doesn't update its dev-tools headers when it updates its
  21259. libraries in a security patch.
  21260. - Fix a potential buffer overflow in lookup_last_hid_serv_request()
  21261. that could happen on 32-bit platforms with 64-bit time_t. Also fix
  21262. a memory leak when requesting a hidden service descriptor we've
  21263. requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
  21264. by aakova.
  21265. - Authorities could be tricked into giving out the Exit flag to relays
  21266. that didn't allow exiting to any ports. This bug could screw
  21267. with load balancing and stats. Bugfix on 0.1.1.6-alpha; fixes bug
  21268. 1238. Bug discovered by Martin Kowalczyk.
  21269. - When freeing a session key, zero it out completely. We only zeroed
  21270. the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
  21271. patched by ekir. Fixes bug 1254.
  21272. o Minor bugfixes:
  21273. - Fix static compilation by listing the openssl libraries in the right
  21274. order. Bugfix on Tor 0.2.2.8-alpha; fixes bug 1237.
  21275. - Resume handling .exit hostnames in a special way: originally we
  21276. stripped the .exit part and used the requested exit relay. In
  21277. 0.2.2.1-alpha we stopped treating them in any special way, meaning
  21278. if you use a .exit address then Tor will pass it on to the exit
  21279. relay. Now we reject the .exit stream outright, since that behavior
  21280. might be more expected by the user. Found and diagnosed by Scott
  21281. Bennett and Downie on or-talk.
  21282. - Don't spam the controller with events when we have no file
  21283. descriptors available. Bugfix on 0.2.1.5-alpha. (Rate-limiting
  21284. for log messages was already solved from bug 748.)
  21285. - Avoid a bogus overlapped memcpy in tor_addr_copy(). Reported by
  21286. "memcpyfail".
  21287. - Make the DNSPort option work with libevent 2.x. Don't alter the
  21288. behavior for libevent 1.x. Fixes bug 1143. Found by SwissTorExit.
  21289. - Emit a GUARD DROPPED controller event for a case we missed.
  21290. - Make more fields in the controller protocol case-insensitive, since
  21291. control-spec.txt said they were.
  21292. - Refactor resolve_my_address() to not use gethostbyname() anymore.
  21293. Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
  21294. - Fix a spec conformance issue: the network-status-version token
  21295. must be the first token in a v3 consensus or vote. Discovered by
  21296. parakeep. Bugfix on 0.2.0.3-alpha.
  21297. o Code simplifications and refactoring:
  21298. - Generate our manpage and HTML documentation using Asciidoc. This
  21299. change should make it easier to maintain the documentation, and
  21300. produce nicer HTML.
  21301. - Remove the --enable-iphone option. According to reports from Marco
  21302. Bonetti, Tor builds fine without any special tweaking on recent
  21303. iPhone SDK versions.
  21304. - Removed some unnecessary files from the source distribution. The
  21305. AUTHORS file has now been merged into the people page on the
  21306. website. The roadmaps and design doc can now be found in the
  21307. projects directory in svn.
  21308. - Enabled various circuit build timeout constants to be controlled
  21309. by consensus parameters. Also set better defaults for these
  21310. parameters based on experimentation on broadband and simulated
  21311. high latency links.
  21312. o Minor features:
  21313. - The 'EXTENDCIRCUIT' control port command can now be used with
  21314. a circ id of 0 and no path. This feature will cause Tor to build
  21315. a new 'fast' general purpose circuit using its own path selection
  21316. algorithms.
  21317. - Added a BUILDTIMEOUT_SET controller event to describe changes
  21318. to the circuit build timeout.
  21319. - Future-proof the controller protocol a bit by ignoring keyword
  21320. arguments we do not recognize.
  21321. - Expand homedirs passed to tor-checkkey. This should silence a
  21322. coverity complaint about passing a user-supplied string into
  21323. open() without checking it.
  21324. Changes in version 0.2.1.25 - 2010-03-16
  21325. Tor 0.2.1.25 fixes a regression introduced in 0.2.1.23 that could
  21326. prevent relays from guessing their IP address correctly. It also fixes
  21327. several minor potential security bugs.
  21328. o Major bugfixes:
  21329. - Fix a regression from our patch for bug 1244 that caused relays
  21330. to guess their IP address incorrectly if they didn't set Address
  21331. in their torrc and/or their address fails to resolve. Bugfix on
  21332. 0.2.1.23; fixes bug 1269.
  21333. - When freeing a session key, zero it out completely. We only zeroed
  21334. the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
  21335. patched by ekir. Fixes bug 1254.
  21336. o Minor bugfixes:
  21337. - Fix a dereference-then-NULL-check sequence when publishing
  21338. descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
  21339. bug 1255.
  21340. - Fix another dereference-then-NULL-check sequence. Bugfix on
  21341. 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
  21342. - Make sure we treat potentially not NUL-terminated strings correctly.
  21343. Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
  21344. Changes in version 0.2.1.24 - 2010-02-21
  21345. Tor 0.2.1.24 makes Tor work again on the latest OS X -- this time
  21346. for sure!
  21347. o Minor bugfixes:
  21348. - Work correctly out-of-the-box with even more vendor-patched versions
  21349. of OpenSSL. In particular, make it so Debian and OS X don't need
  21350. customized patches to run/build.
  21351. Changes in version 0.2.1.23 - 2010-02-13
  21352. Tor 0.2.1.23 fixes a huge client-side performance bug, makes Tor work
  21353. again on the latest OS X, and updates the location of a directory
  21354. authority.
  21355. o Major bugfixes (performance):
  21356. - We were selecting our guards uniformly at random, and then weighting
  21357. which of our guards we'd use uniformly at random. This imbalance
  21358. meant that Tor clients were severely limited on throughput (and
  21359. probably latency too) by the first hop in their circuit. Now we
  21360. select guards weighted by currently advertised bandwidth. We also
  21361. automatically discard guards picked using the old algorithm. Fixes
  21362. bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
  21363. o Major bugfixes:
  21364. - Make Tor work again on the latest OS X: when deciding whether to
  21365. use strange flags to turn TLS renegotiation on, detect the OpenSSL
  21366. version at run-time, not compile time. We need to do this because
  21367. Apple doesn't update its dev-tools headers when it updates its
  21368. libraries in a security patch.
  21369. - Fix a potential buffer overflow in lookup_last_hid_serv_request()
  21370. that could happen on 32-bit platforms with 64-bit time_t. Also fix
  21371. a memory leak when requesting a hidden service descriptor we've
  21372. requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
  21373. by aakova.
  21374. o Directory authority changes:
  21375. - Change IP address for dannenberg (v3 directory authority), and
  21376. remove moria2 (obsolete v1, v2 directory authority and v0 hidden
  21377. service directory authority) from the list.
  21378. o Minor bugfixes:
  21379. - Refactor resolve_my_address() to not use gethostbyname() anymore.
  21380. Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
  21381. o Minor features:
  21382. - Avoid a mad rush at the beginning of each month when each client
  21383. rotates half of its guards. Instead we spread the rotation out
  21384. throughout the month, but we still avoid leaving a precise timestamp
  21385. in the state file about when we first picked the guard. Improves
  21386. over the behavior introduced in 0.1.2.17.
  21387. Changes in version 0.2.2.8-alpha - 2010-01-26
  21388. Tor 0.2.2.8-alpha fixes a crash bug in 0.2.2.7-alpha that has been
  21389. causing bridge relays to disappear. If you're running a bridge,
  21390. please upgrade.
  21391. o Major bugfixes:
  21392. - Fix a memory corruption bug on bridges that occurred during the
  21393. inclusion of stats data in extra-info descriptors. Also fix the
  21394. interface for geoip_get_bridge_stats* to prevent similar bugs in
  21395. the future. Diagnosis by Tas, patch by Karsten and Sebastian.
  21396. Fixes bug 1208; bugfix on 0.2.2.7-alpha.
  21397. o Minor bugfixes:
  21398. - Ignore OutboundBindAddress when connecting to localhost.
  21399. Connections to localhost need to come _from_ localhost, or else
  21400. local servers (like DNS and outgoing HTTP/SOCKS proxies) will often
  21401. refuse to listen.
  21402. Changes in version 0.2.2.7-alpha - 2010-01-19
  21403. Tor 0.2.2.7-alpha fixes a huge client-side performance bug, as well
  21404. as laying the groundwork for further relay-side performance fixes. It
  21405. also starts cleaning up client behavior with respect to the EntryNodes,
  21406. ExitNodes, and StrictNodes config options.
  21407. This release also rotates two directory authority keys, due to a
  21408. security breach of some of the Torproject servers.
  21409. o Directory authority changes:
  21410. - Rotate keys (both v3 identity and relay identity) for moria1
  21411. and gabelmoo.
  21412. o Major features (performance):
  21413. - We were selecting our guards uniformly at random, and then weighting
  21414. which of our guards we'd use uniformly at random. This imbalance
  21415. meant that Tor clients were severely limited on throughput (and
  21416. probably latency too) by the first hop in their circuit. Now we
  21417. select guards weighted by currently advertised bandwidth. We also
  21418. automatically discard guards picked using the old algorithm. Fixes
  21419. bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
  21420. - When choosing which cells to relay first, relays can now favor
  21421. circuits that have been quiet recently, to provide lower latency
  21422. for low-volume circuits. By default, relays enable or disable this
  21423. feature based on a setting in the consensus. You can override
  21424. this default by using the new "CircuitPriorityHalflife" config
  21425. option. Design and code by Ian Goldberg, Can Tang, and Chris
  21426. Alexander.
  21427. - Add separate per-conn write limiting to go with the per-conn read
  21428. limiting. We added a global write limit in Tor 0.1.2.5-alpha,
  21429. but never per-conn write limits.
  21430. - New consensus params "bwconnrate" and "bwconnburst" to let us
  21431. rate-limit client connections as they enter the network. It's
  21432. controlled in the consensus so we can turn it on and off for
  21433. experiments. It's starting out off. Based on proposal 163.
  21434. o Major features (relay selection options):
  21435. - Switch to a StrictNodes config option, rather than the previous
  21436. "StrictEntryNodes" / "StrictExitNodes" separation that was missing a
  21437. "StrictExcludeNodes" option.
  21438. - If EntryNodes, ExitNodes, ExcludeNodes, or ExcludeExitNodes
  21439. change during a config reload, mark and discard all our origin
  21440. circuits. This fix should address edge cases where we change the
  21441. config options and but then choose a circuit that we created before
  21442. the change.
  21443. - If EntryNodes or ExitNodes are set, be more willing to use an
  21444. unsuitable (e.g. slow or unstable) circuit. The user asked for it,
  21445. they get it.
  21446. - Make EntryNodes config option much more aggressive even when
  21447. StrictNodes is not set. Before it would prepend your requested
  21448. entrynodes to your list of guard nodes, but feel free to use others
  21449. after that. Now it chooses only from your EntryNodes if any of
  21450. those are available, and only falls back to others if a) they're
  21451. all down and b) StrictNodes is not set.
  21452. - Now we refresh your entry guards from EntryNodes at each consensus
  21453. fetch -- rather than just at startup and then they slowly rot as
  21454. the network changes.
  21455. o Major bugfixes:
  21456. - Stop bridge directory authorities from answering dbg-stability.txt
  21457. directory queries, which would let people fetch a list of all
  21458. bridge identities they track. Bugfix on 0.2.1.6-alpha.
  21459. o Minor features:
  21460. - Log a notice when we get a new control connection. Now it's easier
  21461. for security-conscious users to recognize when a local application
  21462. is knocking on their controller door. Suggested by bug 1196.
  21463. - New config option "CircuitStreamTimeout" to override our internal
  21464. timeout schedule for how many seconds until we detach a stream from
  21465. a circuit and try a new circuit. If your network is particularly
  21466. slow, you might want to set this to a number like 60.
  21467. - New controller command "getinfo config-text". It returns the
  21468. contents that Tor would write if you send it a SAVECONF command,
  21469. so the controller can write the file to disk itself.
  21470. - New options for SafeLogging to allow scrubbing only log messages
  21471. generated while acting as a relay.
  21472. - Ship the bridges spec file in the tarball too.
  21473. - Avoid a mad rush at the beginning of each month when each client
  21474. rotates half of its guards. Instead we spread the rotation out
  21475. throughout the month, but we still avoid leaving a precise timestamp
  21476. in the state file about when we first picked the guard. Improves
  21477. over the behavior introduced in 0.1.2.17.
  21478. o Minor bugfixes (compiling):
  21479. - Fix compilation on OS X 10.3, which has a stub mlockall() but
  21480. hides it. Bugfix on 0.2.2.6-alpha.
  21481. - Fix compilation on Solaris by removing support for the
  21482. DisableAllSwap config option. Solaris doesn't have an rlimit for
  21483. mlockall, so we cannot use it safely. Fixes bug 1198; bugfix on
  21484. 0.2.2.6-alpha.
  21485. o Minor bugfixes (crashes):
  21486. - Do not segfault when writing buffer stats when we haven't observed
  21487. a single circuit to report about. Found by Fabian Lanze. Bugfix on
  21488. 0.2.2.1-alpha.
  21489. - If we're in the pathological case where there's no exit bandwidth
  21490. but there is non-exit bandwidth, or no guard bandwidth but there
  21491. is non-guard bandwidth, don't crash during path selection. Bugfix
  21492. on 0.2.0.3-alpha.
  21493. - Fix an impossible-to-actually-trigger buffer overflow in relay
  21494. descriptor generation. Bugfix on 0.1.0.15.
  21495. o Minor bugfixes (privacy):
  21496. - Fix an instance where a Tor directory mirror might accidentally
  21497. log the IP address of a misbehaving Tor client. Bugfix on
  21498. 0.1.0.1-rc.
  21499. - Don't list Windows capabilities in relay descriptors. We never made
  21500. use of them, and maybe it's a bad idea to publish them. Bugfix
  21501. on 0.1.1.8-alpha.
  21502. o Minor bugfixes (other):
  21503. - Resolve an edge case in path weighting that could make us misweight
  21504. our relay selection. Fixes bug 1203; bugfix on 0.0.8rc1.
  21505. - Fix statistics on client numbers by country as seen by bridges that
  21506. were broken in 0.2.2.1-alpha. Also switch to reporting full 24-hour
  21507. intervals instead of variable 12-to-48-hour intervals.
  21508. - After we free an internal connection structure, overwrite it
  21509. with a different memory value than we use for overwriting a freed
  21510. internal circuit structure. Should help with debugging. Suggested
  21511. by bug 1055.
  21512. - Update our OpenSSL 0.9.8l fix so that it works with OpenSSL 0.9.8m
  21513. too.
  21514. o Removed features:
  21515. - Remove the HSAuthorityRecordStats option that version 0 hidden
  21516. service authorities could have used to track statistics of overall
  21517. hidden service usage.
  21518. Changes in version 0.2.1.22 - 2010-01-19
  21519. Tor 0.2.1.22 fixes a critical privacy problem in bridge directory
  21520. authorities -- it would tell you its whole history of bridge descriptors
  21521. if you make the right directory request. This stable update also
  21522. rotates two of the seven v3 directory authority keys and locations.
  21523. o Directory authority changes:
  21524. - Rotate keys (both v3 identity and relay identity) for moria1
  21525. and gabelmoo.
  21526. o Major bugfixes:
  21527. - Stop bridge directory authorities from answering dbg-stability.txt
  21528. directory queries, which would let people fetch a list of all
  21529. bridge identities they track. Bugfix on 0.2.1.6-alpha.
  21530. Changes in version 0.2.1.21 - 2009-12-21
  21531. Tor 0.2.1.21 fixes an incompatibility with the most recent OpenSSL
  21532. library. If you use Tor on Linux / Unix and you're getting SSL
  21533. renegotiation errors, upgrading should help. We also recommend an
  21534. upgrade if you're an exit relay.
  21535. o Major bugfixes:
  21536. - Work around a security feature in OpenSSL 0.9.8l that prevents our
  21537. handshake from working unless we explicitly tell OpenSSL that we
  21538. are using SSL renegotiation safely. We are, of course, but OpenSSL
  21539. 0.9.8l won't work unless we say we are.
  21540. - Avoid crashing if the client is trying to upload many bytes and the
  21541. circuit gets torn down at the same time, or if the flip side
  21542. happens on the exit relay. Bugfix on 0.2.0.1-alpha; fixes bug 1150.
  21543. o Minor bugfixes:
  21544. - Do not refuse to learn about authority certs and v2 networkstatus
  21545. documents that are older than the latest consensus. This bug might
  21546. have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
  21547. Spotted and fixed by xmux.
  21548. - Fix a couple of very-hard-to-trigger memory leaks, and one hard-to-
  21549. trigger platform-specific option misparsing case found by Coverity
  21550. Scan.
  21551. - Fix a compilation warning on Fedora 12 by removing an impossible-to-
  21552. trigger assert. Fixes bug 1173.
  21553. Changes in version 0.2.2.6-alpha - 2009-11-19
  21554. Tor 0.2.2.6-alpha lays the groundwork for many upcoming features:
  21555. support for the new lower-footprint "microdescriptor" directory design,
  21556. future-proofing our consensus format against new hash functions or
  21557. other changes, and an Android port. It also makes Tor compatible with
  21558. the upcoming OpenSSL 0.9.8l release, and fixes a variety of bugs.
  21559. o Major features:
  21560. - Directory authorities can now create, vote on, and serve multiple
  21561. parallel formats of directory data as part of their voting process.
  21562. Partially implements Proposal 162: "Publish the consensus in
  21563. multiple flavors".
  21564. - Directory authorities can now agree on and publish small summaries
  21565. of router information that clients can use in place of regular
  21566. server descriptors. This transition will eventually allow clients
  21567. to use far less bandwidth for downloading information about the
  21568. network. Begins the implementation of Proposal 158: "Clients
  21569. download consensus + microdescriptors".
  21570. - The directory voting system is now extensible to use multiple hash
  21571. algorithms for signatures and resource selection. Newer formats
  21572. are signed with SHA256, with a possibility for moving to a better
  21573. hash algorithm in the future.
  21574. - New DisableAllSwap option. If set to 1, Tor will attempt to lock all
  21575. current and future memory pages via mlockall(). On supported
  21576. platforms (modern Linux and probably BSD but not Windows or OS X),
  21577. this should effectively disable any and all attempts to page out
  21578. memory. This option requires that you start your Tor as root --
  21579. if you use DisableAllSwap, please consider using the User option
  21580. to properly reduce the privileges of your Tor.
  21581. - Numerous changes, bugfixes, and workarounds from Nathan Freitas
  21582. to help Tor build correctly for Android phones.
  21583. o Major bugfixes:
  21584. - Work around a security feature in OpenSSL 0.9.8l that prevents our
  21585. handshake from working unless we explicitly tell OpenSSL that we
  21586. are using SSL renegotiation safely. We are, but OpenSSL 0.9.8l
  21587. won't work unless we say we are.
  21588. o Minor bugfixes:
  21589. - Fix a crash bug when trying to initialize the evdns module in
  21590. Libevent 2. Bugfix on 0.2.1.16-rc.
  21591. - Stop logging at severity 'warn' when some other Tor client tries
  21592. to establish a circuit with us using weak DH keys. It's a protocol
  21593. violation, but that doesn't mean ordinary users need to hear about
  21594. it. Fixes the bug part of bug 1114. Bugfix on 0.1.0.13.
  21595. - Do not refuse to learn about authority certs and v2 networkstatus
  21596. documents that are older than the latest consensus. This bug might
  21597. have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
  21598. Spotted and fixed by xmux.
  21599. - Fix numerous small code-flaws found by Coverity Scan Rung 3.
  21600. - If all authorities restart at once right before a consensus vote,
  21601. nobody will vote about "Running", and clients will get a consensus
  21602. with no usable relays. Instead, authorities refuse to build a
  21603. consensus if this happens. Bugfix on 0.2.0.10-alpha; fixes bug 1066.
  21604. - If your relay can't keep up with the number of incoming create
  21605. cells, it would log one warning per failure into your logs. Limit
  21606. warnings to 1 per minute. Bugfix on 0.0.2pre10; fixes bug 1042.
  21607. - Bridges now use "reject *:*" as their default exit policy. Bugfix
  21608. on 0.2.0.3-alpha; fixes bug 1113.
  21609. - Fix a memory leak on directory authorities during voting that was
  21610. introduced in 0.2.2.1-alpha. Found via valgrind.
  21611. Changes in version 0.2.1.20 - 2009-10-15
  21612. Tor 0.2.1.20 fixes a crash bug when you're accessing many hidden
  21613. services at once, prepares for more performance improvements, and
  21614. fixes a bunch of smaller bugs.
  21615. The Windows and OS X bundles also include a more recent Vidalia,
  21616. and switch from Privoxy to Polipo.
  21617. The OS X installers are now drag and drop. It's best to un-install
  21618. Tor/Vidalia and then install this new bundle, rather than upgrade. If
  21619. you want to upgrade, you'll need to update the paths for Tor and Polipo
  21620. in the Vidalia Settings window.
  21621. o Major bugfixes:
  21622. - Send circuit or stream sendme cells when our window has decreased
  21623. by 100 cells, not when it has decreased by 101 cells. Bug uncovered
  21624. by Karsten when testing the "reduce circuit window" performance
  21625. patch. Bugfix on the 54th commit on Tor -- from July 2002,
  21626. before the release of Tor 0.0.0. This is the new winner of the
  21627. oldest-bug prize.
  21628. - Fix a remotely triggerable memory leak when a consensus document
  21629. contains more than one signature from the same voter. Bugfix on
  21630. 0.2.0.3-alpha.
  21631. - Avoid segfault in rare cases when finishing an introduction circuit
  21632. as a client and finding out that we don't have an introduction key
  21633. for it. Fixes bug 1073. Reported by Aaron Swartz.
  21634. o Major features:
  21635. - Tor now reads the "circwindow" parameter out of the consensus,
  21636. and uses that value for its circuit package window rather than the
  21637. default of 1000 cells. Begins the implementation of proposal 168.
  21638. o New directory authorities:
  21639. - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
  21640. authority.
  21641. - Move moria1 and tonga to alternate IP addresses.
  21642. o Minor bugfixes:
  21643. - Fix a signed/unsigned compile warning in 0.2.1.19.
  21644. - Fix possible segmentation fault on directory authorities. Bugfix on
  21645. 0.2.1.14-rc.
  21646. - Fix an extremely rare infinite recursion bug that could occur if
  21647. we tried to log a message after shutting down the log subsystem.
  21648. Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
  21649. - Fix an obscure bug where hidden services on 64-bit big-endian
  21650. systems might mis-read the timestamp in v3 introduce cells, and
  21651. refuse to connect back to the client. Discovered by "rotor".
  21652. Bugfix on 0.2.1.6-alpha.
  21653. - We were triggering a CLOCK_SKEW controller status event whenever
  21654. we connect via the v2 connection protocol to any relay that has
  21655. a wrong clock. Instead, we should only inform the controller when
  21656. it's a trusted authority that claims our clock is wrong. Bugfix
  21657. on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
  21658. - We were telling the controller about CHECKING_REACHABILITY and
  21659. REACHABILITY_FAILED status events whenever we launch a testing
  21660. circuit or notice that one has failed. Instead, only tell the
  21661. controller when we want to inform the user of overall success or
  21662. overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
  21663. by SwissTorExit.
  21664. - Don't warn when we're using a circuit that ends with a node
  21665. excluded in ExcludeExitNodes, but the circuit is not used to access
  21666. the outside world. This should help fix bug 1090. Bugfix on
  21667. 0.2.1.6-alpha.
  21668. - Work around a small memory leak in some versions of OpenSSL that
  21669. stopped the memory used by the hostname TLS extension from being
  21670. freed.
  21671. o Minor features:
  21672. - Add a "getinfo status/accepted-server-descriptor" controller
  21673. command, which is the recommended way for controllers to learn
  21674. whether our server descriptor has been successfully received by at
  21675. least on directory authority. Un-recommend good-server-descriptor
  21676. getinfo and status events until we have a better design for them.
  21677. Changes in version 0.2.2.5-alpha - 2009-10-11
  21678. Tor 0.2.2.5-alpha fixes a few compile problems in 0.2.2.4-alpha.
  21679. o Major bugfixes:
  21680. - Make the tarball compile again. Oops. Bugfix on 0.2.2.4-alpha.
  21681. o Directory authorities:
  21682. - Temporarily (just for this release) move dizum to an alternate
  21683. IP address.
  21684. Changes in version 0.2.2.4-alpha - 2009-10-10
  21685. Tor 0.2.2.4-alpha fixes more crash bugs in 0.2.2.2-alpha. It also
  21686. introduces a new unit test framework, shifts directry authority
  21687. addresses around to reduce the impact from recent blocking events,
  21688. and fixes a few smaller bugs.
  21689. o Major bugfixes:
  21690. - Fix several more asserts in the circuit_build_times code, for
  21691. example one that causes Tor to fail to start once we have
  21692. accumulated 5000 build times in the state file. Bugfixes on
  21693. 0.2.2.2-alpha; fixes bug 1108.
  21694. o New directory authorities:
  21695. - Move moria1 and Tonga to alternate IP addresses.
  21696. o Minor features:
  21697. - Log SSL state transitions at debug level during handshake, and
  21698. include SSL states in error messages. This may help debug future
  21699. SSL handshake issues.
  21700. - Add a new "Handshake" log domain for activities that happen
  21701. during the TLS handshake.
  21702. - Revert to the "June 3 2009" ip-to-country file. The September one
  21703. seems to have removed most US IP addresses.
  21704. - Directory authorities now reject Tor relays with versions less than
  21705. 0.1.2.14. This step cuts out four relays from the current network,
  21706. none of which are very big.
  21707. o Minor bugfixes:
  21708. - Fix a couple of smaller issues with gathering statistics. Bugfixes
  21709. on 0.2.2.1-alpha.
  21710. - Fix two memory leaks in the error case of
  21711. circuit_build_times_parse_state(). Bugfix on 0.2.2.2-alpha.
  21712. - Don't count one-hop circuits when we're estimating how long it
  21713. takes circuits to build on average. Otherwise we'll set our circuit
  21714. build timeout lower than we should. Bugfix on 0.2.2.2-alpha.
  21715. - Directory authorities no longer change their opinion of, or vote on,
  21716. whether a router is Running, unless they have themselves been
  21717. online long enough to have some idea. Bugfix on 0.2.0.6-alpha.
  21718. Fixes bug 1023.
  21719. o Code simplifications and refactoring:
  21720. - Revise our unit tests to use the "tinytest" framework, so we
  21721. can run tests in their own processes, have smarter setup/teardown
  21722. code, and so on. The unit test code has moved to its own
  21723. subdirectory, and has been split into multiple modules.
  21724. Changes in version 0.2.2.3-alpha - 2009-09-23
  21725. Tor 0.2.2.3-alpha fixes a few crash bugs in 0.2.2.2-alpha.
  21726. o Major bugfixes:
  21727. - Fix an overzealous assert in our new circuit build timeout code.
  21728. Bugfix on 0.2.2.2-alpha; fixes bug 1103.
  21729. o Minor bugfixes:
  21730. - If the networkstatus consensus tells us that we should use a
  21731. negative circuit package window, ignore it. Otherwise we'll
  21732. believe it and then trigger an assert. Bugfix on 0.2.2.2-alpha.
  21733. Changes in version 0.2.2.2-alpha - 2009-09-21
  21734. Tor 0.2.2.2-alpha introduces our latest performance improvement for
  21735. clients: Tor tracks the average time it takes to build a circuit, and
  21736. avoids using circuits that take too long to build. For fast connections,
  21737. this feature can cut your expected latency in half. For slow or flaky
  21738. connections, it could ruin your Tor experience. Let us know if it does!
  21739. o Major features:
  21740. - Tor now tracks how long it takes to build client-side circuits
  21741. over time, and adapts its timeout to local network performance.
  21742. Since a circuit that takes a long time to build will also provide
  21743. bad performance, we get significant latency improvements by
  21744. discarding the slowest 20% of circuits. Specifically, Tor creates
  21745. circuits more aggressively than usual until it has enough data
  21746. points for a good timeout estimate. Implements proposal 151.
  21747. We are especially looking for reports (good and bad) from users with
  21748. both EDGE and broadband connections that can move from broadband
  21749. to EDGE and find out if the build-time data in the .tor/state gets
  21750. reset without loss of Tor usability. You should also see a notice
  21751. log message telling you that Tor has reset its timeout.
  21752. - Directory authorities can now vote on arbitrary integer values as
  21753. part of the consensus process. This is designed to help set
  21754. network-wide parameters. Implements proposal 167.
  21755. - Tor now reads the "circwindow" parameter out of the consensus,
  21756. and uses that value for its circuit package window rather than the
  21757. default of 1000 cells. Begins the implementation of proposal 168.
  21758. o Major bugfixes:
  21759. - Fix a remotely triggerable memory leak when a consensus document
  21760. contains more than one signature from the same voter. Bugfix on
  21761. 0.2.0.3-alpha.
  21762. o Minor bugfixes:
  21763. - Fix an extremely rare infinite recursion bug that could occur if
  21764. we tried to log a message after shutting down the log subsystem.
  21765. Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
  21766. - Fix parsing for memory or time units given without a space between
  21767. the number and the unit. Bugfix on 0.2.2.1-alpha; fixes bug 1076.
  21768. - A networkstatus vote must contain exactly one signature. Spec
  21769. conformance issue. Bugfix on 0.2.0.3-alpha.
  21770. - Fix an obscure bug where hidden services on 64-bit big-endian
  21771. systems might mis-read the timestamp in v3 introduce cells, and
  21772. refuse to connect back to the client. Discovered by "rotor".
  21773. Bugfix on 0.2.1.6-alpha.
  21774. - We were triggering a CLOCK_SKEW controller status event whenever
  21775. we connect via the v2 connection protocol to any relay that has
  21776. a wrong clock. Instead, we should only inform the controller when
  21777. it's a trusted authority that claims our clock is wrong. Bugfix
  21778. on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
  21779. - We were telling the controller about CHECKING_REACHABILITY and
  21780. REACHABILITY_FAILED status events whenever we launch a testing
  21781. circuit or notice that one has failed. Instead, only tell the
  21782. controller when we want to inform the user of overall success or
  21783. overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
  21784. by SwissTorExit.
  21785. - Don't warn when we're using a circuit that ends with a node
  21786. excluded in ExcludeExitNodes, but the circuit is not used to access
  21787. the outside world. This should help fix bug 1090, but more problems
  21788. remain. Bugfix on 0.2.1.6-alpha.
  21789. - Work around a small memory leak in some versions of OpenSSL that
  21790. stopped the memory used by the hostname TLS extension from being
  21791. freed.
  21792. - Make our 'torify' script more portable; if we have only one of
  21793. 'torsocks' or 'tsocks' installed, don't complain to the user;
  21794. and explain our warning about tsocks better.
  21795. o Minor features:
  21796. - Add a "getinfo status/accepted-server-descriptor" controller
  21797. command, which is the recommended way for controllers to learn
  21798. whether our server descriptor has been successfully received by at
  21799. least on directory authority. Un-recommend good-server-descriptor
  21800. getinfo and status events until we have a better design for them.
  21801. - Update to the "September 4 2009" ip-to-country file.
  21802. Changes in version 0.2.2.1-alpha - 2009-08-26
  21803. Tor 0.2.2.1-alpha disables ".exit" address notation by default, allows
  21804. Tor clients to bootstrap on networks where only port 80 is reachable,
  21805. makes it more straightforward to support hardware crypto accelerators,
  21806. and starts the groundwork for gathering stats safely at relays.
  21807. o Security fixes:
  21808. - Start the process of disabling ".exit" address notation, since it
  21809. can be used for a variety of esoteric application-level attacks
  21810. on users. To reenable it, set "AllowDotExit 1" in your torrc. Fix
  21811. on 0.0.9rc5.
  21812. o New directory authorities:
  21813. - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
  21814. authority.
  21815. o Major features:
  21816. - New AccelName and AccelDir options add support for dynamic OpenSSL
  21817. hardware crypto acceleration engines.
  21818. - Tor now supports tunneling all of its outgoing connections over
  21819. a SOCKS proxy, using the SOCKS4Proxy and/or SOCKS5Proxy
  21820. configuration options. Code by Christopher Davis.
  21821. o Major bugfixes:
  21822. - Send circuit or stream sendme cells when our window has decreased
  21823. by 100 cells, not when it has decreased by 101 cells. Bug uncovered
  21824. by Karsten when testing the "reduce circuit window" performance
  21825. patch. Bugfix on the 54th commit on Tor -- from July 2002,
  21826. before the release of Tor 0.0.0. This is the new winner of the
  21827. oldest-bug prize.
  21828. o New options for gathering stats safely:
  21829. - Directory mirrors that set "DirReqStatistics 1" write statistics
  21830. about directory requests to disk every 24 hours. As compared to the
  21831. --enable-geoip-stats flag in 0.2.1.x, there are a few improvements:
  21832. 1) stats are written to disk exactly every 24 hours; 2) estimated
  21833. shares of v2 and v3 requests are determined as mean values, not at
  21834. the end of a measurement period; 3) unresolved requests are listed
  21835. with country code '??'; 4) directories also measure download times.
  21836. - Exit nodes that set "ExitPortStatistics 1" write statistics on the
  21837. number of exit streams and transferred bytes per port to disk every
  21838. 24 hours.
  21839. - Relays that set "CellStatistics 1" write statistics on how long
  21840. cells spend in their circuit queues to disk every 24 hours.
  21841. - Entry nodes that set "EntryStatistics 1" write statistics on the
  21842. rough number and origins of connecting clients to disk every 24
  21843. hours.
  21844. - Relays that write any of the above statistics to disk and set
  21845. "ExtraInfoStatistics 1" include the past 24 hours of statistics in
  21846. their extra-info documents.
  21847. o Minor features:
  21848. - New --digests command-line switch to output the digests of the
  21849. source files Tor was built with.
  21850. - The "torify" script now uses torsocks where available.
  21851. - The memarea code now uses a sentinel value at the end of each area
  21852. to make sure nothing writes beyond the end of an area. This might
  21853. help debug some conceivable causes of bug 930.
  21854. - Time and memory units in the configuration file can now be set to
  21855. fractional units. For example, "2.5 GB" is now a valid value for
  21856. AccountingMax.
  21857. - Certain Tor clients (such as those behind check.torproject.org) may
  21858. want to fetch the consensus in an extra early manner. To enable this
  21859. a user may now set FetchDirInfoExtraEarly to 1. This also depends on
  21860. setting FetchDirInfoEarly to 1. Previous behavior will stay the same
  21861. as only certain clients who must have this information sooner should
  21862. set this option.
  21863. - Instead of adding the svn revision to the Tor version string, report
  21864. the git commit (when we're building from a git checkout).
  21865. o Minor bugfixes:
  21866. - If any of the v3 certs we download are unparseable, we should
  21867. actually notice the failure so we don't retry indefinitely. Bugfix
  21868. on 0.2.0.x; reported by "rotator".
  21869. - If the cached cert file is unparseable, warn but don't exit.
  21870. - Fix possible segmentation fault on directory authorities. Bugfix on
  21871. 0.2.1.14-rc.
  21872. - When Tor fails to parse a descriptor of any kind, dump it to disk.
  21873. Might help diagnosing bug 1051.
  21874. o Deprecated and removed features:
  21875. - The controller no longer accepts the old obsolete "addr-mappings/"
  21876. or "unregistered-servers-" GETINFO values.
  21877. - Hidden services no longer publish version 0 descriptors, and clients
  21878. do not request or use version 0 descriptors. However, the old hidden
  21879. service authorities still accept and serve version 0 descriptors
  21880. when contacted by older hidden services/clients.
  21881. - The EXTENDED_EVENTS and VERBOSE_NAMES controller features are now
  21882. always on; using them is necessary for correct forward-compatible
  21883. controllers.
  21884. - Remove support for .noconnect style addresses. Nobody was using
  21885. them, and they provided another avenue for detecting Tor users
  21886. via application-level web tricks.
  21887. o Packaging changes:
  21888. - Upgrade Vidalia from 0.1.15 to 0.2.3 in the Windows and OS X
  21889. installer bundles. See
  21890. https://trac.vidalia-project.net/browser/vidalia/tags/vidalia-0.2.3/CHANGELOG
  21891. for details of what's new in Vidalia 0.2.3.
  21892. - Windows Vidalia Bundle: update Privoxy from 3.0.6 to 3.0.14-beta.
  21893. - OS X Vidalia Bundle: move to Polipo 1.0.4 with Tor specific
  21894. configuration file, rather than the old Privoxy.
  21895. - OS X Vidalia Bundle: Vidalia, Tor, and Polipo are compiled as
  21896. x86-only for better compatibility with OS X 10.6, aka Snow Leopard.
  21897. - OS X Tor Expert Bundle: Tor is compiled as x86-only for
  21898. better compatibility with OS X 10.6, aka Snow Leopard.
  21899. - OS X Vidalia Bundle: The multi-package installer is now replaced
  21900. by a simple drag and drop to the /Applications folder. This change
  21901. occurred with the upgrade to Vidalia 0.2.3.
  21902. Changes in version 0.2.1.19 - 2009-07-28
  21903. Tor 0.2.1.19 fixes a major bug with accessing and providing hidden
  21904. services on Tor 0.2.1.3-alpha through 0.2.1.18.
  21905. o Major bugfixes:
  21906. - Make accessing hidden services on 0.2.1.x work right again.
  21907. Bugfix on 0.2.1.3-alpha; workaround for bug 1038. Diagnosis and
  21908. part of patch provided by "optimist".
  21909. o Minor features:
  21910. - When a relay/bridge is writing out its identity key fingerprint to
  21911. the "fingerprint" file and to its logs, write it without spaces. Now
  21912. it will look like the fingerprints in our bridges documentation,
  21913. and confuse fewer users.
  21914. o Minor bugfixes:
  21915. - Relays no longer publish a new server descriptor if they change
  21916. their MaxAdvertisedBandwidth config option but it doesn't end up
  21917. changing their advertised bandwidth numbers. Bugfix on 0.2.0.28-rc;
  21918. fixes bug 1026. Patch from Sebastian.
  21919. - Avoid leaking memory every time we get a create cell but we have
  21920. so many already queued that we refuse it. Bugfix on 0.2.0.19-alpha;
  21921. fixes bug 1034. Reported by BarkerJr.
  21922. Changes in version 0.2.1.18 - 2009-07-24
  21923. Tor 0.2.1.18 lays the foundations for performance improvements,
  21924. adds status events to help users diagnose bootstrap problems, adds
  21925. optional authentication/authorization for hidden services, fixes a
  21926. variety of potential anonymity problems, and includes a huge pile of
  21927. other features and bug fixes.
  21928. o Build fixes:
  21929. - Add LIBS=-lrt to Makefile.am so the Tor RPMs use a static libevent.
  21930. Changes in version 0.2.1.17-rc - 2009-07-07
  21931. Tor 0.2.1.17-rc marks the fourth -- and hopefully last -- release
  21932. candidate for the 0.2.1.x series. It lays the groundwork for further
  21933. client performance improvements, and also fixes a big bug with directory
  21934. authorities that were causing them to assign Guard and Stable flags
  21935. poorly.
  21936. The Windows bundles also finally include the geoip database that we
  21937. thought we'd been shipping since 0.2.0.x (oops), and the OS X bundles
  21938. should actually install Torbutton rather than giving you a cryptic
  21939. failure message (oops).
  21940. o Major features:
  21941. - Clients now use the bandwidth values in the consensus, rather than
  21942. the bandwidth values in each relay descriptor. This approach opens
  21943. the door to more accurate bandwidth estimates once the directory
  21944. authorities start doing active measurements. Implements more of
  21945. proposal 141.
  21946. o Major bugfixes:
  21947. - When Tor clients restart after 1-5 days, they discard all their
  21948. cached descriptors as too old, but they still use the cached
  21949. consensus document. This approach is good for robustness, but
  21950. bad for performance: since they don't know any bandwidths, they
  21951. end up choosing at random rather than weighting their choice by
  21952. speed. Fixed by the above feature of putting bandwidths in the
  21953. consensus. Bugfix on 0.2.0.x.
  21954. - Directory authorities were neglecting to mark relays down in their
  21955. internal histories if the relays fall off the routerlist without
  21956. ever being found unreachable. So there were relays in the histories
  21957. that haven't been seen for eight months, and are listed as being
  21958. up for eight months. This wreaked havoc on the "median wfu"
  21959. and "median mtbf" calculations, in turn making Guard and Stable
  21960. flags very wrong, hurting network performance. Fixes bugs 696 and
  21961. 969. Bugfix on 0.2.0.6-alpha.
  21962. o Minor bugfixes:
  21963. - Serve the DirPortFrontPage page even when we have been approaching
  21964. our quotas recently. Fixes bug 1013; bugfix on 0.2.1.8-alpha.
  21965. - The control port would close the connection before flushing long
  21966. replies, such as the network consensus, if a QUIT command was issued
  21967. before the reply had completed. Now, the control port flushes all
  21968. pending replies before closing the connection. Also fixed a spurious
  21969. warning when a QUIT command is issued after a malformed or rejected
  21970. AUTHENTICATE command, but before the connection was closed. Patch
  21971. by Marcus Griep. Bugfix on 0.2.0.x; fixes bugs 1015 and 1016.
  21972. - When we can't find an intro key for a v2 hidden service descriptor,
  21973. fall back to the v0 hidden service descriptor and log a bug message.
  21974. Workaround for bug 1024.
  21975. - Fix a log message that did not respect the SafeLogging option.
  21976. Resolves bug 1027.
  21977. o Minor features:
  21978. - If we're a relay and we change our IP address, be more verbose
  21979. about the reason that made us change. Should help track down
  21980. further bugs for relays on dynamic IP addresses.
  21981. Changes in version 0.2.0.35 - 2009-06-24
  21982. o Security fix:
  21983. - Avoid crashing in the presence of certain malformed descriptors.
  21984. Found by lark, and by automated fuzzing.
  21985. - Fix an edge case where a malicious exit relay could convince a
  21986. controller that the client's DNS question resolves to an internal IP
  21987. address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
  21988. o Major bugfixes:
  21989. - Finally fix the bug where dynamic-IP relays disappear when their
  21990. IP address changes: directory mirrors were mistakenly telling
  21991. them their old address if they asked via begin_dir, so they
  21992. never got an accurate answer about their new address, so they
  21993. just vanished after a day. For belt-and-suspenders, relays that
  21994. don't set Address in their config now avoid using begin_dir for
  21995. all direct connections. Should fix bugs 827, 883, and 900.
  21996. - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
  21997. that would occur on some exit nodes when DNS failures and timeouts
  21998. occurred in certain patterns. Fix for bug 957.
  21999. o Minor bugfixes:
  22000. - When starting with a cache over a few days old, do not leak
  22001. memory for the obsolete router descriptors in it. Bugfix on
  22002. 0.2.0.33; fixes bug 672.
  22003. - Hidden service clients didn't use a cached service descriptor that
  22004. was older than 15 minutes, but wouldn't fetch a new one either,
  22005. because there was already one in the cache. Now, fetch a v2
  22006. descriptor unless the same descriptor was added to the cache within
  22007. the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
  22008. Changes in version 0.2.1.16-rc - 2009-06-20
  22009. Tor 0.2.1.16-rc speeds up performance for fast exit relays, and fixes
  22010. a bunch of minor bugs.
  22011. o Security fixes:
  22012. - Fix an edge case where a malicious exit relay could convince a
  22013. controller that the client's DNS question resolves to an internal IP
  22014. address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
  22015. o Major performance improvements (on 0.2.0.x):
  22016. - Disable and refactor some debugging checks that forced a linear scan
  22017. over the whole server-side DNS cache. These accounted for over 50%
  22018. of CPU time on a relatively busy exit node's gprof profile. Found
  22019. by Jacob.
  22020. - Disable some debugging checks that appeared in exit node profile
  22021. data.
  22022. o Minor features:
  22023. - Update to the "June 3 2009" ip-to-country file.
  22024. - Do not have tor-resolve automatically refuse all .onion addresses;
  22025. if AutomapHostsOnResolve is set in your torrc, this will work fine.
  22026. o Minor bugfixes (on 0.2.0.x):
  22027. - Log correct error messages for DNS-related network errors on
  22028. Windows.
  22029. - Fix a race condition that could cause crashes or memory corruption
  22030. when running as a server with a controller listening for log
  22031. messages.
  22032. - Avoid crashing when we have a policy specified in a DirPolicy or
  22033. SocksPolicy or ReachableAddresses option with ports set on it,
  22034. and we re-load the policy. May fix bug 996.
  22035. - Hidden service clients didn't use a cached service descriptor that
  22036. was older than 15 minutes, but wouldn't fetch a new one either,
  22037. because there was already one in the cache. Now, fetch a v2
  22038. descriptor unless the same descriptor was added to the cache within
  22039. the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
  22040. o Minor bugfixes (on 0.2.1.x):
  22041. - Don't warn users about low port and hibernation mix when they
  22042. provide a *ListenAddress directive to fix that. Bugfix on
  22043. 0.2.1.15-rc.
  22044. - When switching back and forth between bridge mode, do not start
  22045. gathering GeoIP data until two hours have passed.
  22046. - Do not complain that the user has requested an excluded node as
  22047. an exit when the node is not really an exit. This could happen
  22048. because the circuit was for testing, or an introduction point.
  22049. Fix for bug 984.
  22050. Changes in version 0.2.1.15-rc - 2009-05-25
  22051. Tor 0.2.1.15-rc marks the second release candidate for the 0.2.1.x
  22052. series. It fixes a major bug on fast exit relays, as well as a variety
  22053. of more minor bugs.
  22054. o Major bugfixes (on 0.2.0.x):
  22055. - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
  22056. that would occur on some exit nodes when DNS failures and timeouts
  22057. occurred in certain patterns. Fix for bug 957.
  22058. o Minor bugfixes (on 0.2.0.x):
  22059. - Actually return -1 in the error case for read_bandwidth_usage().
  22060. Harmless bug, since we currently don't care about the return value
  22061. anywhere. Bugfix on 0.2.0.9-alpha.
  22062. - Provide a more useful log message if bug 977 (related to buffer
  22063. freelists) ever reappears, and do not crash right away.
  22064. - Fix an assertion failure on 64-bit platforms when we allocated
  22065. memory right up to the end of a memarea, then realigned the memory
  22066. one step beyond the end. Fixes a possible cause of bug 930.
  22067. - Protect the count of open sockets with a mutex, so we can't
  22068. corrupt it when two threads are closing or opening sockets at once.
  22069. Fix for bug 939. Bugfix on 0.2.0.1-alpha.
  22070. - Don't allow a bridge to publish its router descriptor to a
  22071. non-bridge directory authority. Fixes part of bug 932.
  22072. - When we change to or from being a bridge, reset our counts of
  22073. client usage by country. Fixes bug 932.
  22074. - Fix a bug that made stream bandwidth get misreported to the
  22075. controller.
  22076. - Stop using malloc_usable_size() to use more area than we had
  22077. actually allocated: it was safe, but made valgrind really unhappy.
  22078. - Fix a memory leak when v3 directory authorities load their keys
  22079. and cert from disk. Bugfix on 0.2.0.1-alpha.
  22080. o Minor bugfixes (on 0.2.1.x):
  22081. - Fix use of freed memory when deciding to mark a non-addable
  22082. descriptor as never-downloadable. Bugfix on 0.2.1.9-alpha.
  22083. Changes in version 0.2.1.14-rc - 2009-04-12
  22084. Tor 0.2.1.14-rc marks the first release candidate for the 0.2.1.x
  22085. series. It begins fixing some major performance problems, and also
  22086. finally addresses the bug that was causing relays on dynamic IP
  22087. addresses to fall out of the directory.
  22088. o Major features:
  22089. - Clients replace entry guards that were chosen more than a few months
  22090. ago. This change should significantly improve client performance,
  22091. especially once more people upgrade, since relays that have been
  22092. a guard for a long time are currently overloaded.
  22093. o Major bugfixes (on 0.2.0):
  22094. - Finally fix the bug where dynamic-IP relays disappear when their
  22095. IP address changes: directory mirrors were mistakenly telling
  22096. them their old address if they asked via begin_dir, so they
  22097. never got an accurate answer about their new address, so they
  22098. just vanished after a day. For belt-and-suspenders, relays that
  22099. don't set Address in their config now avoid using begin_dir for
  22100. all direct connections. Should fix bugs 827, 883, and 900.
  22101. - Relays were falling out of the networkstatus consensus for
  22102. part of a day if they changed their local config but the
  22103. authorities discarded their new descriptor as "not sufficiently
  22104. different". Now directory authorities accept a descriptor as changed
  22105. if bandwidthrate or bandwidthburst changed. Partial fix for bug 962;
  22106. patch by Sebastian.
  22107. - Avoid crashing in the presence of certain malformed descriptors.
  22108. Found by lark, and by automated fuzzing.
  22109. o Minor features:
  22110. - When generating circuit events with verbose nicknames for
  22111. controllers, try harder to look up nicknames for routers on a
  22112. circuit. (Previously, we would look in the router descriptors we had
  22113. for nicknames, but not in the consensus.) Partial fix for bug 941.
  22114. - If the bridge config line doesn't specify a port, assume 443.
  22115. This makes bridge lines a bit smaller and easier for users to
  22116. understand.
  22117. - Raise the minimum bandwidth to be a relay from 20000 bytes to 20480
  22118. bytes (aka 20KB/s), to match our documentation. Also update
  22119. directory authorities so they always assign the Fast flag to relays
  22120. with 20KB/s of capacity. Now people running relays won't suddenly
  22121. find themselves not seeing any use, if the network gets faster
  22122. on average.
  22123. - Update to the "April 3 2009" ip-to-country file.
  22124. o Minor bugfixes:
  22125. - Avoid trying to print raw memory to the logs when we decide to
  22126. give up on downloading a given relay descriptor. Bugfix on
  22127. 0.2.1.9-alpha.
  22128. - In tor-resolve, when the Tor client to use is specified by
  22129. <hostname>:<port>, actually use the specified port rather than
  22130. defaulting to 9050. Bugfix on 0.2.1.6-alpha.
  22131. - Make directory usage recording work again. Bugfix on 0.2.1.6-alpha.
  22132. - When starting with a cache over a few days old, do not leak
  22133. memory for the obsolete router descriptors in it. Bugfix on
  22134. 0.2.0.33.
  22135. - Avoid double-free on list of successfully uploaded hidden
  22136. service discriptors. Fix for bug 948. Bugfix on 0.2.1.6-alpha.
  22137. - Change memarea_strndup() implementation to work even when
  22138. duplicating a string at the end of a page. This bug was
  22139. harmless for now, but could have meant crashes later. Fix by
  22140. lark. Bugfix on 0.2.1.1-alpha.
  22141. - Limit uploaded directory documents to be 16M rather than 500K.
  22142. The directory authorities were refusing v3 consensus votes from
  22143. other authorities, since the votes are now 504K. Fixes bug 959;
  22144. bugfix on 0.0.2pre17 (where we raised it from 50K to 500K ;).
  22145. - Directory authorities should never send a 503 "busy" response to
  22146. requests for votes or keys. Bugfix on 0.2.0.8-alpha; exposed by
  22147. bug 959.
  22148. Changes in version 0.2.1.13-alpha - 2009-03-09
  22149. Tor 0.2.1.13-alpha includes another big pile of minor bugfixes and
  22150. cleanups. We're finally getting close to a release candidate.
  22151. o Major bugfixes:
  22152. - Correctly update the list of which countries we exclude as
  22153. exits, when the GeoIP file is loaded or reloaded. Diagnosed by
  22154. lark. Bugfix on 0.2.1.6-alpha.
  22155. o Minor bugfixes (on 0.2.0.x and earlier):
  22156. - Automatically detect MacOSX versions earlier than 10.4.0, and
  22157. disable kqueue from inside Tor when running with these versions.
  22158. We previously did this from the startup script, but that was no
  22159. help to people who didn't use the startup script. Resolves bug 863.
  22160. - When we had picked an exit node for a connection, but marked it as
  22161. "optional", and it turned out we had no onion key for the exit,
  22162. stop wanting that exit and try again. This situation may not
  22163. be possible now, but will probably become feasible with proposal
  22164. 158. Spotted by rovv. Fixes another case of bug 752.
  22165. - Clients no longer cache certificates for authorities they do not
  22166. recognize. Bugfix on 0.2.0.9-alpha.
  22167. - When we can't transmit a DNS request due to a network error, retry
  22168. it after a while, and eventually transmit a failing response to
  22169. the RESOLVED cell. Bugfix on 0.1.2.5-alpha.
  22170. - If the controller claimed responsibility for a stream, but that
  22171. stream never finished making its connection, it would live
  22172. forever in circuit_wait state. Now we close it after SocksTimeout
  22173. seconds. Bugfix on 0.1.2.7-alpha; reported by Mike Perry.
  22174. - Drop begin cells to a hidden service if they come from the middle
  22175. of a circuit. Patch from lark.
  22176. - When we erroneously receive two EXTEND cells for the same circuit
  22177. ID on the same connection, drop the second. Patch from lark.
  22178. - Fix a crash that occurs on exit nodes when a nameserver request
  22179. timed out. Bugfix on 0.1.2.1-alpha; our CLEAR debugging code had
  22180. been suppressing the bug since 0.1.2.10-alpha. Partial fix for
  22181. bug 929.
  22182. - Do not assume that a stack-allocated character array will be
  22183. 64-bit aligned on platforms that demand that uint64_t access is
  22184. aligned. Possible fix for bug 604.
  22185. - Parse dates and IPv4 addresses in a locale- and libc-independent
  22186. manner, to avoid platform-dependent behavior on malformed input.
  22187. - Build correctly when configured to build outside the main source
  22188. path. Patch from Michael Gold.
  22189. - We were already rejecting relay begin cells with destination port
  22190. of 0. Now also reject extend cells with destination port or address
  22191. of 0. Suggested by lark.
  22192. o Minor bugfixes (on 0.2.1.x):
  22193. - Don't re-extend introduction circuits if we ran out of RELAY_EARLY
  22194. cells. Bugfix on 0.2.1.3-alpha. Fixes more of bug 878.
  22195. - If we're an exit node, scrub the IP address to which we are exiting
  22196. in the logs. Bugfix on 0.2.1.8-alpha.
  22197. o Minor features:
  22198. - On Linux, use the prctl call to re-enable core dumps when the user
  22199. is option is set.
  22200. - New controller event NEWCONSENSUS that lists the networkstatus
  22201. lines for every recommended relay. Now controllers like Torflow
  22202. can keep up-to-date on which relays they should be using.
  22203. - Update to the "February 26 2009" ip-to-country file.
  22204. Changes in version 0.2.0.34 - 2009-02-08
  22205. Tor 0.2.0.34 features several more security-related fixes. You should
  22206. upgrade, especially if you run an exit relay (remote crash) or a
  22207. directory authority (remote infinite loop), or you're on an older
  22208. (pre-XP) or not-recently-patched Windows (remote exploit).
  22209. This release marks end-of-life for Tor 0.1.2.x. Those Tor versions
  22210. have many known flaws, and nobody should be using them. You should
  22211. upgrade. If you're using a Linux or BSD and its packages are obsolete,
  22212. stop using those packages and upgrade anyway.
  22213. o Security fixes:
  22214. - Fix an infinite-loop bug on handling corrupt votes under certain
  22215. circumstances. Bugfix on 0.2.0.8-alpha.
  22216. - Fix a temporary DoS vulnerability that could be performed by
  22217. a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
  22218. - Avoid a potential crash on exit nodes when processing malformed
  22219. input. Remote DoS opportunity. Bugfix on 0.2.0.33.
  22220. - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
  22221. Spec conformance issue. Bugfix on Tor 0.0.2pre27.
  22222. o Minor bugfixes:
  22223. - Fix compilation on systems where time_t is a 64-bit integer.
  22224. Patch from Matthias Drochner.
  22225. - Don't consider expiring already-closed client connections. Fixes
  22226. bug 893. Bugfix on 0.0.2pre20.
  22227. Changes in version 0.2.1.12-alpha - 2009-02-08
  22228. Tor 0.2.1.12-alpha features several more security-related fixes. You
  22229. should upgrade, especially if you run an exit relay (remote crash) or
  22230. a directory authority (remote infinite loop), or you're on an older
  22231. (pre-XP) or not-recently-patched Windows (remote exploit). It also
  22232. includes a big pile of minor bugfixes and cleanups.
  22233. o Security fixes:
  22234. - Fix an infinite-loop bug on handling corrupt votes under certain
  22235. circumstances. Bugfix on 0.2.0.8-alpha.
  22236. - Fix a temporary DoS vulnerability that could be performed by
  22237. a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
  22238. - Avoid a potential crash on exit nodes when processing malformed
  22239. input. Remote DoS opportunity. Bugfix on 0.2.1.7-alpha.
  22240. o Minor bugfixes:
  22241. - Let controllers actually ask for the "clients_seen" event for
  22242. getting usage summaries on bridge relays. Bugfix on 0.2.1.10-alpha;
  22243. reported by Matt Edman.
  22244. - Fix a compile warning on OSX Panther. Fixes bug 913; bugfix against
  22245. 0.2.1.11-alpha.
  22246. - Fix a bug in address parsing that was preventing bridges or hidden
  22247. service targets from being at IPv6 addresses.
  22248. - Solve a bug that kept hardware crypto acceleration from getting
  22249. enabled when accounting was turned on. Fixes bug 907. Bugfix on
  22250. 0.0.9pre6.
  22251. - Remove a bash-ism from configure.in to build properly on non-Linux
  22252. platforms. Bugfix on 0.2.1.1-alpha.
  22253. - Fix code so authorities _actually_ send back X-Descriptor-Not-New
  22254. headers. Bugfix on 0.2.0.10-alpha.
  22255. - Don't consider expiring already-closed client connections. Fixes
  22256. bug 893. Bugfix on 0.0.2pre20.
  22257. - Fix another interesting corner-case of bug 891 spotted by rovv:
  22258. Previously, if two hosts had different amounts of clock drift, and
  22259. one of them created a new connection with just the wrong timing,
  22260. the other might decide to deprecate the new connection erroneously.
  22261. Bugfix on 0.1.1.13-alpha.
  22262. - Resolve a very rare crash bug that could occur when the user forced
  22263. a nameserver reconfiguration during the middle of a nameserver
  22264. probe. Fixes bug 526. Bugfix on 0.1.2.1-alpha.
  22265. - Support changing value of ServerDNSRandomizeCase during SIGHUP.
  22266. Bugfix on 0.2.1.7-alpha.
  22267. - If we're using bridges and our network goes away, be more willing
  22268. to forgive our bridges and try again when we get an application
  22269. request. Bugfix on 0.2.0.x.
  22270. o Minor features:
  22271. - Support platforms where time_t is 64 bits long. (Congratulations,
  22272. NetBSD!) Patch from Matthias Drochner.
  22273. - Add a 'getinfo status/clients-seen' controller command, in case
  22274. controllers want to hear clients_seen events but connect late.
  22275. o Build changes:
  22276. - Disable GCC's strict alias optimization by default, to avoid the
  22277. likelihood of its introducing subtle bugs whenever our code violates
  22278. the letter of C99's alias rules.
  22279. Changes in version 0.2.0.33 - 2009-01-21
  22280. Tor 0.2.0.33 fixes a variety of bugs that were making relays less
  22281. useful to users. It also finally fixes a bug where a relay or client
  22282. that's been off for many days would take a long time to bootstrap.
  22283. This update also fixes an important security-related bug reported by
  22284. Ilja van Sprundel. You should upgrade. (We'll send out more details
  22285. about the bug once people have had some time to upgrade.)
  22286. o Security fixes:
  22287. - Fix a heap-corruption bug that may be remotely triggerable on
  22288. some platforms. Reported by Ilja van Sprundel.
  22289. o Major bugfixes:
  22290. - When a stream at an exit relay is in state "resolving" or
  22291. "connecting" and it receives an "end" relay cell, the exit relay
  22292. would silently ignore the end cell and not close the stream. If
  22293. the client never closes the circuit, then the exit relay never
  22294. closes the TCP connection. Bug introduced in Tor 0.1.2.1-alpha;
  22295. reported by "wood".
  22296. - When sending CREATED cells back for a given circuit, use a 64-bit
  22297. connection ID to find the right connection, rather than an addr:port
  22298. combination. Now that we can have multiple OR connections between
  22299. the same ORs, it is no longer possible to use addr:port to uniquely
  22300. identify a connection.
  22301. - Bridge relays that had DirPort set to 0 would stop fetching
  22302. descriptors shortly after startup, and then briefly resume
  22303. after a new bandwidth test and/or after publishing a new bridge
  22304. descriptor. Bridge users that try to bootstrap from them would
  22305. get a recent networkstatus but would get descriptors from up to
  22306. 18 hours earlier, meaning most of the descriptors were obsolete
  22307. already. Reported by Tas; bugfix on 0.2.0.13-alpha.
  22308. - Prevent bridge relays from serving their 'extrainfo' document
  22309. to anybody who asks, now that extrainfo docs include potentially
  22310. sensitive aggregated client geoip summaries. Bugfix on
  22311. 0.2.0.13-alpha.
  22312. - If the cached networkstatus consensus is more than five days old,
  22313. discard it rather than trying to use it. In theory it could be
  22314. useful because it lists alternate directory mirrors, but in practice
  22315. it just means we spend many minutes trying directory mirrors that
  22316. are long gone from the network. Also discard router descriptors as
  22317. we load them if they are more than five days old, since the onion
  22318. key is probably wrong by now. Bugfix on 0.2.0.x. Fixes bug 887.
  22319. o Minor bugfixes:
  22320. - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
  22321. could make gcc generate non-functional binary search code. Bugfix
  22322. on 0.2.0.10-alpha.
  22323. - Build correctly on platforms without socklen_t.
  22324. - Compile without warnings on solaris.
  22325. - Avoid potential crash on internal error during signature collection.
  22326. Fixes bug 864. Patch from rovv.
  22327. - Correct handling of possible malformed authority signing key
  22328. certificates with internal signature types. Fixes bug 880.
  22329. Bugfix on 0.2.0.3-alpha.
  22330. - Fix a hard-to-trigger resource leak when logging credential status.
  22331. CID 349.
  22332. - When we can't initialize DNS because the network is down, do not
  22333. automatically stop Tor from starting. Instead, we retry failed
  22334. dns_init() every 10 minutes, and change the exit policy to reject
  22335. *:* until one succeeds. Fixes bug 691.
  22336. - Use 64 bits instead of 32 bits for connection identifiers used with
  22337. the controller protocol, to greatly reduce risk of identifier reuse.
  22338. - When we're choosing an exit node for a circuit, and we have
  22339. no pending streams, choose a good general exit rather than one that
  22340. supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
  22341. - Fix another case of assuming, when a specific exit is requested,
  22342. that we know more than the user about what hosts it allows.
  22343. Fixes one case of bug 752. Patch from rovv.
  22344. - Clip the MaxCircuitDirtiness config option to a minimum of 10
  22345. seconds. Warn the user if lower values are given in the
  22346. configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
  22347. - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
  22348. user if lower values are given in the configuration. Bugfix on
  22349. 0.1.1.17-rc. Patch by Sebastian.
  22350. - Fix a memory leak when we decline to add a v2 rendezvous descriptor to
  22351. the cache because we already had a v0 descriptor with the same ID.
  22352. Bugfix on 0.2.0.18-alpha.
  22353. - Fix a race condition when freeing keys shared between main thread
  22354. and CPU workers that could result in a memory leak. Bugfix on
  22355. 0.1.0.1-rc. Fixes bug 889.
  22356. - Send a valid END cell back when a client tries to connect to a
  22357. nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
  22358. 840. Patch from rovv.
  22359. - Check which hops rendezvous stream cells are associated with to
  22360. prevent possible guess-the-streamid injection attacks from
  22361. intermediate hops. Fixes another case of bug 446. Based on patch
  22362. from rovv.
  22363. - If a broken client asks a non-exit router to connect somewhere,
  22364. do not even do the DNS lookup before rejecting the connection.
  22365. Fixes another case of bug 619. Patch from rovv.
  22366. - When a relay gets a create cell it can't decrypt (e.g. because it's
  22367. using the wrong onion key), we were dropping it and letting the
  22368. client time out. Now actually answer with a destroy cell. Fixes
  22369. bug 904. Bugfix on 0.0.2pre8.
  22370. o Minor bugfixes (hidden services):
  22371. - Do not throw away existing introduction points on SIGHUP. Bugfix on
  22372. 0.0.6pre1. Patch by Karsten. Fixes bug 874.
  22373. o Minor features:
  22374. - Report the case where all signatures in a detached set are rejected
  22375. differently than the case where there is an error handling the
  22376. detached set.
  22377. - When we realize that another process has modified our cached
  22378. descriptors, print out a more useful error message rather than
  22379. triggering an assertion. Fixes bug 885. Patch from Karsten.
  22380. - Implement the 0x20 hack to better resist DNS poisoning: set the
  22381. case on outgoing DNS requests randomly, and reject responses that do
  22382. not match the case correctly. This logic can be disabled with the
  22383. ServerDNSRamdomizeCase setting, if you are using one of the 0.3%
  22384. of servers that do not reliably preserve case in replies. See
  22385. "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
  22386. for more info.
  22387. - Check DNS replies for more matching fields to better resist DNS
  22388. poisoning.
  22389. - Never use OpenSSL compression: it wastes RAM and CPU trying to
  22390. compress cells, which are basically all encrypted, compressed, or
  22391. both.
  22392. Changes in version 0.2.1.11-alpha - 2009-01-20
  22393. Tor 0.2.1.11-alpha finishes fixing the "if your Tor is off for a
  22394. week it will take a long time to bootstrap again" bug. It also fixes
  22395. an important security-related bug reported by Ilja van Sprundel. You
  22396. should upgrade. (We'll send out more details about the bug once people
  22397. have had some time to upgrade.)
  22398. o Security fixes:
  22399. - Fix a heap-corruption bug that may be remotely triggerable on
  22400. some platforms. Reported by Ilja van Sprundel.
  22401. o Major bugfixes:
  22402. - Discard router descriptors as we load them if they are more than
  22403. five days old. Otherwise if Tor is off for a long time and then
  22404. starts with cached descriptors, it will try to use the onion
  22405. keys in those obsolete descriptors when building circuits. Bugfix
  22406. on 0.2.0.x. Fixes bug 887.
  22407. o Minor features:
  22408. - Try to make sure that the version of Libevent we're running with
  22409. is binary-compatible with the one we built with. May address bug
  22410. 897 and others.
  22411. - Make setting ServerDNSRandomizeCase to 0 actually work. Bugfix
  22412. for bug 905. Bugfix on 0.2.1.7-alpha.
  22413. - Add a new --enable-local-appdata configuration switch to change
  22414. the default location of the datadir on win32 from APPDATA to
  22415. LOCAL_APPDATA. In the future, we should migrate to LOCAL_APPDATA
  22416. entirely. Patch from coderman.
  22417. o Minor bugfixes:
  22418. - Make outbound DNS packets respect the OutboundBindAddress setting.
  22419. Fixes the bug part of bug 798. Bugfix on 0.1.2.2-alpha.
  22420. - When our circuit fails at the first hop (e.g. we get a destroy
  22421. cell back), avoid using that OR connection anymore, and also
  22422. tell all the one-hop directory requests waiting for it that they
  22423. should fail. Bugfix on 0.2.1.3-alpha.
  22424. - In the torify(1) manpage, mention that tsocks will leak your
  22425. DNS requests.
  22426. Changes in version 0.2.1.10-alpha - 2009-01-06
  22427. Tor 0.2.1.10-alpha fixes two major bugs in bridge relays (one that
  22428. would make the bridge relay not so useful if it had DirPort set to 0,
  22429. and one that could let an attacker learn a little bit of information
  22430. about the bridge's users), and a bug that would cause your Tor relay
  22431. to ignore a circuit create request it can't decrypt (rather than reply
  22432. with an error). It also fixes a wide variety of other bugs.
  22433. o Major bugfixes:
  22434. - If the cached networkstatus consensus is more than five days old,
  22435. discard it rather than trying to use it. In theory it could
  22436. be useful because it lists alternate directory mirrors, but in
  22437. practice it just means we spend many minutes trying directory
  22438. mirrors that are long gone from the network. Helps bug 887 a bit;
  22439. bugfix on 0.2.0.x.
  22440. - Bridge relays that had DirPort set to 0 would stop fetching
  22441. descriptors shortly after startup, and then briefly resume
  22442. after a new bandwidth test and/or after publishing a new bridge
  22443. descriptor. Bridge users that try to bootstrap from them would
  22444. get a recent networkstatus but would get descriptors from up to
  22445. 18 hours earlier, meaning most of the descriptors were obsolete
  22446. already. Reported by Tas; bugfix on 0.2.0.13-alpha.
  22447. - Prevent bridge relays from serving their 'extrainfo' document
  22448. to anybody who asks, now that extrainfo docs include potentially
  22449. sensitive aggregated client geoip summaries. Bugfix on
  22450. 0.2.0.13-alpha.
  22451. o Minor features:
  22452. - New controller event "clients_seen" to report a geoip-based summary
  22453. of which countries we've seen clients from recently. Now controllers
  22454. like Vidalia can show bridge operators that they're actually making
  22455. a difference.
  22456. - Build correctly against versions of OpenSSL 0.9.8 or later built
  22457. without support for deprecated functions.
  22458. - Update to the "December 19 2008" ip-to-country file.
  22459. o Minor bugfixes (on 0.2.0.x):
  22460. - Authorities now vote for the Stable flag for any router whose
  22461. weighted MTBF is at least 5 days, regardless of the mean MTBF.
  22462. - Do not remove routers as too old if we do not have any consensus
  22463. document. Bugfix on 0.2.0.7-alpha.
  22464. - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
  22465. Spec conformance issue. Bugfix on Tor 0.0.2pre27.
  22466. - When an exit relay resolves a stream address to a local IP address,
  22467. do not just keep retrying that same exit relay over and
  22468. over. Instead, just close the stream. Addresses bug 872. Bugfix
  22469. on 0.2.0.32. Patch from rovv.
  22470. - If a hidden service sends us an END cell, do not consider
  22471. retrying the connection; just close it. Patch from rovv.
  22472. - When we made bridge authorities stop serving bridge descriptors over
  22473. unencrypted links, we also broke DirPort reachability testing for
  22474. bridges. So bridges with a non-zero DirPort were printing spurious
  22475. warns to their logs. Bugfix on 0.2.0.16-alpha. Fixes bug 709.
  22476. - When a relay gets a create cell it can't decrypt (e.g. because it's
  22477. using the wrong onion key), we were dropping it and letting the
  22478. client time out. Now actually answer with a destroy cell. Fixes
  22479. bug 904. Bugfix on 0.0.2pre8.
  22480. - Squeeze 2-5% out of client performance (according to oprofile) by
  22481. improving the implementation of some policy-manipulation functions.
  22482. o Minor bugfixes (on 0.2.1.x):
  22483. - Make get_interface_address() function work properly again; stop
  22484. guessing the wrong parts of our address as our address.
  22485. - Do not cannibalize a circuit if we're out of RELAY_EARLY cells to
  22486. send on that circuit. Otherwise we might violate the proposal-110
  22487. limit. Bugfix on 0.2.1.3-alpha. Partial fix for bug 878. Diagnosis
  22488. thanks to Karsten.
  22489. - When we're sending non-EXTEND cells to the first hop in a circuit,
  22490. for example to use an encrypted directory connection, we don't need
  22491. to use RELAY_EARLY cells: the first hop knows what kind of cell
  22492. it is, and nobody else can even see the cell type. Conserving
  22493. RELAY_EARLY cells makes it easier to cannibalize circuits like
  22494. this later.
  22495. - Stop logging nameserver addresses in reverse order.
  22496. - If we are retrying a directory download slowly over and over, do
  22497. not automatically give up after the 254th failure. Bugfix on
  22498. 0.2.1.9-alpha.
  22499. - Resume reporting accurate "stream end" reasons to the local control
  22500. port. They were lost in the changes for Proposal 148. Bugfix on
  22501. 0.2.1.9-alpha.
  22502. o Deprecated and removed features:
  22503. - The old "tor --version --version" command, which would print out
  22504. the subversion "Id" of most of the source files, is now removed. It
  22505. turned out to be less useful than we'd expected, and harder to
  22506. maintain.
  22507. o Code simplifications and refactoring:
  22508. - Change our header file guard macros to be less likely to conflict
  22509. with system headers. Adam Langley noticed that we were conflicting
  22510. with log.h on Android.
  22511. - Tool-assisted documentation cleanup. Nearly every function or
  22512. static variable in Tor should have its own documentation now.
  22513. Changes in version 0.2.1.9-alpha - 2008-12-25
  22514. Tor 0.2.1.9-alpha fixes many more bugs, some of them security-related.
  22515. o New directory authorities:
  22516. - gabelmoo (the authority run by Karsten Loesing) now has a new
  22517. IP address.
  22518. o Security fixes:
  22519. - Never use a connection with a mismatched address to extend a
  22520. circuit, unless that connection is canonical. A canonical
  22521. connection is one whose address is authenticated by the router's
  22522. identity key, either in a NETINFO cell or in a router descriptor.
  22523. - Avoid a possible memory corruption bug when receiving hidden service
  22524. descriptors. Bugfix on 0.2.1.6-alpha.
  22525. o Major bugfixes:
  22526. - Fix a logic error that would automatically reject all but the first
  22527. configured DNS server. Bugfix on 0.2.1.5-alpha. Possible fix for
  22528. part of bug 813/868. Bug spotted by coderman.
  22529. - When a stream at an exit relay is in state "resolving" or
  22530. "connecting" and it receives an "end" relay cell, the exit relay
  22531. would silently ignore the end cell and not close the stream. If
  22532. the client never closes the circuit, then the exit relay never
  22533. closes the TCP connection. Bug introduced in 0.1.2.1-alpha;
  22534. reported by "wood".
  22535. - When we can't initialize DNS because the network is down, do not
  22536. automatically stop Tor from starting. Instead, retry failed
  22537. dns_init() every 10 minutes, and change the exit policy to reject
  22538. *:* until one succeeds. Fixes bug 691.
  22539. o Minor features:
  22540. - Give a better error message when an overzealous init script says
  22541. "sudo -u username tor --user username". Makes Bug 882 easier for
  22542. users to diagnose.
  22543. - When a directory authority gives us a new guess for our IP address,
  22544. log which authority we used. Hopefully this will help us debug
  22545. the recent complaints about bad IP address guesses.
  22546. - Detect svn revision properly when we're using git-svn.
  22547. - Try not to open more than one descriptor-downloading connection
  22548. to an authority at once. This should reduce load on directory
  22549. authorities. Fixes bug 366.
  22550. - Add cross-certification to newly generated certificates, so that
  22551. a signing key is enough information to look up a certificate.
  22552. Partial implementation of proposal 157.
  22553. - Start serving certificates by <identity digest, signing key digest>
  22554. pairs. Partial implementation of proposal 157.
  22555. - Clients now never report any stream end reason except 'MISC'.
  22556. Implements proposal 148.
  22557. - On platforms with a maximum syslog string length, truncate syslog
  22558. messages to that length ourselves, rather than relying on the
  22559. system to do it for us.
  22560. - Optimize out calls to time(NULL) that occur for every IO operation,
  22561. or for every cell. On systems where time() is a slow syscall,
  22562. this fix will be slightly helpful.
  22563. - Exit servers can now answer resolve requests for ip6.arpa addresses.
  22564. - When we download a descriptor that we then immediately (as
  22565. a directory authority) reject, do not retry downloading it right
  22566. away. Should save some bandwidth on authorities. Fix for bug
  22567. 888. Patch by Sebastian Hahn.
  22568. - When a download gets us zero good descriptors, do not notify
  22569. Tor that new directory information has arrived.
  22570. - Avoid some nasty corner cases in the logic for marking connections
  22571. as too old or obsolete or noncanonical for circuits. Partial
  22572. bugfix on bug 891.
  22573. o Minor features (controller):
  22574. - New CONSENSUS_ARRIVED event to note when a new consensus has
  22575. been fetched and validated.
  22576. - When we realize that another process has modified our cached
  22577. descriptors file, print out a more useful error message rather
  22578. than triggering an assertion. Fixes bug 885. Patch from Karsten.
  22579. - Add an internal-use-only __ReloadTorrcOnSIGHUP option for
  22580. controllers to prevent SIGHUP from reloading the
  22581. configuration. Fixes bug 856.
  22582. o Minor bugfixes:
  22583. - Resume using the correct "REASON=" stream when telling the
  22584. controller why we closed a stream. Bugfix in 0.2.1.1-alpha.
  22585. - When a canonical connection appears later in our internal list
  22586. than a noncanonical one for a given OR ID, always use the
  22587. canonical one. Bugfix on 0.2.0.12-alpha. Fixes bug 805.
  22588. Spotted by rovv.
  22589. - Clip the MaxCircuitDirtiness config option to a minimum of 10
  22590. seconds. Warn the user if lower values are given in the
  22591. configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
  22592. - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
  22593. user if lower values are given in the configuration. Bugfix on
  22594. 0.1.1.17-rc. Patch by Sebastian.
  22595. - Fix a race condition when freeing keys shared between main thread
  22596. and CPU workers that could result in a memory leak. Bugfix on
  22597. 0.1.0.1-rc. Fixes bug 889.
  22598. o Minor bugfixes (hidden services):
  22599. - Do not throw away existing introduction points on SIGHUP (bugfix on
  22600. 0.0.6pre1); also, do not stall hidden services because we're
  22601. throwing away introduction points; bugfix on 0.2.1.7-alpha. Spotted
  22602. by John Brooks. Patch by Karsten. Fixes bug 874.
  22603. - Fix a memory leak when we decline to add a v2 rendezvous
  22604. descriptor to the cache because we already had a v0 descriptor
  22605. with the same ID. Bugfix on 0.2.0.18-alpha.
  22606. o Deprecated and removed features:
  22607. - RedirectExits has been removed. It was deprecated since
  22608. 0.2.0.3-alpha.
  22609. - Finally remove deprecated "EXTENDED_FORMAT" controller feature. It
  22610. has been called EXTENDED_EVENTS since 0.1.2.4-alpha.
  22611. - Cell pools are now always enabled; --disable-cell-pools is ignored.
  22612. o Code simplifications and refactoring:
  22613. - Rename the confusing or_is_obsolete field to the more appropriate
  22614. is_bad_for_new_circs, and move it to or_connection_t where it
  22615. belongs.
  22616. - Move edge-only flags from connection_t to edge_connection_t: not
  22617. only is this better coding, but on machines of plausible alignment,
  22618. it should save 4-8 bytes per connection_t. "Every little bit helps."
  22619. - Rename ServerDNSAllowBrokenResolvConf to ServerDNSAllowBrokenConfig
  22620. for consistency; keep old option working for backward compatibility.
  22621. - Simplify the code for finding connections to use for a circuit.
  22622. Changes in version 0.2.1.8-alpha - 2008-12-08
  22623. Tor 0.2.1.8-alpha fixes some crash bugs in earlier alpha releases,
  22624. builds better on unusual platforms like Solaris and old OS X, and
  22625. fixes a variety of other issues.
  22626. o Major features:
  22627. - New DirPortFrontPage option that takes an html file and publishes
  22628. it as "/" on the DirPort. Now relay operators can provide a
  22629. disclaimer without needing to set up a separate webserver. There's
  22630. a sample disclaimer in contrib/tor-exit-notice.html.
  22631. o Security fixes:
  22632. - When the client is choosing entry guards, now it selects at most
  22633. one guard from a given relay family. Otherwise we could end up with
  22634. all of our entry points into the network run by the same operator.
  22635. Suggested by Camilo Viecco. Fix on 0.1.1.11-alpha.
  22636. o Major bugfixes:
  22637. - Fix a DOS opportunity during the voting signature collection process
  22638. at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
  22639. - Fix a possible segfault when establishing an exit connection. Bugfix
  22640. on 0.2.1.5-alpha.
  22641. o Minor bugfixes:
  22642. - Get file locking working on win32. Bugfix on 0.2.1.6-alpha. Fixes
  22643. bug 859.
  22644. - Made Tor a little less aggressive about deleting expired
  22645. certificates. Partial fix for bug 854.
  22646. - Stop doing unaligned memory access that generated bus errors on
  22647. sparc64. Bugfix on 0.2.0.10-alpha. Fix for bug 862.
  22648. - Fix a crash bug when changing EntryNodes from the controller. Bugfix
  22649. on 0.2.1.6-alpha. Fix for bug 867. Patched by Sebastian.
  22650. - Make USR2 log-level switch take effect immediately. Bugfix on
  22651. 0.1.2.8-beta.
  22652. - If one win32 nameserver fails to get added, continue adding the
  22653. rest, and don't automatically fail.
  22654. - Use fcntl() for locking when flock() is not available. Should fix
  22655. compilation on Solaris. Should fix Bug 873. Bugfix on 0.2.1.6-alpha.
  22656. - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
  22657. could make gcc generate non-functional binary search code. Bugfix
  22658. on 0.2.0.10-alpha.
  22659. - Build correctly on platforms without socklen_t.
  22660. - Avoid potential crash on internal error during signature collection.
  22661. Fixes bug 864. Patch from rovv.
  22662. - Do not use C's stdio library for writing to log files. This will
  22663. improve logging performance by a minute amount, and will stop
  22664. leaking fds when our disk is full. Fixes bug 861.
  22665. - Stop erroneous use of O_APPEND in cases where we did not in fact
  22666. want to re-seek to the end of a file before every last write().
  22667. - Correct handling of possible malformed authority signing key
  22668. certificates with internal signature types. Fixes bug 880. Bugfix
  22669. on 0.2.0.3-alpha.
  22670. - Fix a hard-to-trigger resource leak when logging credential status.
  22671. CID 349.
  22672. o Minor features:
  22673. - Directory mirrors no longer fetch the v1 directory or
  22674. running-routers files. They are obsolete, and nobody asks for them
  22675. anymore. This is the first step to making v1 authorities obsolete.
  22676. o Minor features (controller):
  22677. - Return circuit purposes in response to GETINFO circuit-status. Fixes
  22678. bug 858.
  22679. Changes in version 0.2.0.32 - 2008-11-20
  22680. Tor 0.2.0.32 fixes a major security problem in Debian and Ubuntu
  22681. packages (and maybe other packages) noticed by Theo de Raadt, fixes
  22682. a smaller security flaw that might allow an attacker to access local
  22683. services, further improves hidden service performance, and fixes a
  22684. variety of other issues.
  22685. o Security fixes:
  22686. - The "User" and "Group" config options did not clear the
  22687. supplementary group entries for the Tor process. The "User" option
  22688. is now more robust, and we now set the groups to the specified
  22689. user's primary group. The "Group" option is now ignored. For more
  22690. detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
  22691. in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
  22692. and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848 and 857.
  22693. - The "ClientDNSRejectInternalAddresses" config option wasn't being
  22694. consistently obeyed: if an exit relay refuses a stream because its
  22695. exit policy doesn't allow it, we would remember what IP address
  22696. the relay said the destination address resolves to, even if it's
  22697. an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
  22698. o Major bugfixes:
  22699. - Fix a DOS opportunity during the voting signature collection process
  22700. at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
  22701. o Major bugfixes (hidden services):
  22702. - When fetching v0 and v2 rendezvous service descriptors in parallel,
  22703. we were failing the whole hidden service request when the v0
  22704. descriptor fetch fails, even if the v2 fetch is still pending and
  22705. might succeed. Similarly, if the last v2 fetch fails, we were
  22706. failing the whole hidden service request even if a v0 fetch is
  22707. still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
  22708. - When extending a circuit to a hidden service directory to upload a
  22709. rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
  22710. requests failed, because the router descriptor has not been
  22711. downloaded yet. In these cases, do not attempt to upload the
  22712. rendezvous descriptor, but wait until the router descriptor is
  22713. downloaded and retry. Likewise, do not attempt to fetch a rendezvous
  22714. descriptor from a hidden service directory for which the router
  22715. descriptor has not yet been downloaded. Fixes bug 767. Bugfix
  22716. on 0.2.0.10-alpha.
  22717. o Minor bugfixes:
  22718. - Fix several infrequent memory leaks spotted by Coverity.
  22719. - When testing for libevent functions, set the LDFLAGS variable
  22720. correctly. Found by Riastradh.
  22721. - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
  22722. bootstrapping with tunneled directory connections. Bugfix on
  22723. 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
  22724. - When asked to connect to A.B.exit:80, if we don't know the IP for A
  22725. and we know that server B rejects most-but-not all connections to
  22726. port 80, we would previously reject the connection. Now, we assume
  22727. the user knows what they were asking for. Fixes bug 752. Bugfix
  22728. on 0.0.9rc5. Diagnosed by BarkerJr.
  22729. - If we overrun our per-second write limits a little, count this as
  22730. having used up our write allocation for the second, and choke
  22731. outgoing directory writes. Previously, we had only counted this when
  22732. we had met our limits precisely. Fixes bug 824. Patch from by rovv.
  22733. Bugfix on 0.2.0.x (??).
  22734. - Remove the old v2 directory authority 'lefkada' from the default
  22735. list. It has been gone for many months.
  22736. - Stop doing unaligned memory access that generated bus errors on
  22737. sparc64. Bugfix on 0.2.0.10-alpha. Fixes bug 862.
  22738. - Make USR2 log-level switch take effect immediately. Bugfix on
  22739. 0.1.2.8-beta.
  22740. o Minor bugfixes (controller):
  22741. - Make DNS resolved events into "CLOSED", not "FAILED". Bugfix on
  22742. 0.1.2.5-alpha. Fix by Robert Hogan. Resolves bug 807.
  22743. Changes in version 0.2.1.7-alpha - 2008-11-08
  22744. Tor 0.2.1.7-alpha fixes a major security problem in Debian and Ubuntu
  22745. packages (and maybe other packages) noticed by Theo de Raadt, fixes
  22746. a smaller security flaw that might allow an attacker to access local
  22747. services, adds better defense against DNS poisoning attacks on exit
  22748. relays, further improves hidden service performance, and fixes a
  22749. variety of other issues.
  22750. o Security fixes:
  22751. - The "ClientDNSRejectInternalAddresses" config option wasn't being
  22752. consistently obeyed: if an exit relay refuses a stream because its
  22753. exit policy doesn't allow it, we would remember what IP address
  22754. the relay said the destination address resolves to, even if it's
  22755. an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
  22756. - The "User" and "Group" config options did not clear the
  22757. supplementary group entries for the Tor process. The "User" option
  22758. is now more robust, and we now set the groups to the specified
  22759. user's primary group. The "Group" option is now ignored. For more
  22760. detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
  22761. in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
  22762. and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848.
  22763. - Do not use or believe expired v3 authority certificates. Patch
  22764. from Karsten. Bugfix in 0.2.0.x. Fixes bug 851.
  22765. o Minor features:
  22766. - Now NodeFamily and MyFamily config options allow spaces in
  22767. identity fingerprints, so it's easier to paste them in.
  22768. Suggested by Lucky Green.
  22769. - Implement the 0x20 hack to better resist DNS poisoning: set the
  22770. case on outgoing DNS requests randomly, and reject responses that do
  22771. not match the case correctly. This logic can be disabled with the
  22772. ServerDNSRandomizeCase setting, if you are using one of the 0.3%
  22773. of servers that do not reliably preserve case in replies. See
  22774. "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
  22775. for more info.
  22776. - Preserve case in replies to DNSPort requests in order to support
  22777. the 0x20 hack for resisting DNS poisoning attacks.
  22778. o Hidden service performance improvements:
  22779. - When the client launches an introduction circuit, retry with a
  22780. new circuit after 30 seconds rather than 60 seconds.
  22781. - Launch a second client-side introduction circuit in parallel
  22782. after a delay of 15 seconds (based on work by Christian Wilms).
  22783. - Hidden services start out building five intro circuits rather
  22784. than three, and when the first three finish they publish a service
  22785. descriptor using those. Now we publish our service descriptor much
  22786. faster after restart.
  22787. o Minor bugfixes:
  22788. - Minor fix in the warning messages when you're having problems
  22789. bootstrapping; also, be more forgiving of bootstrap problems when
  22790. we're still making incremental progress on a given bootstrap phase.
  22791. - When we're choosing an exit node for a circuit, and we have
  22792. no pending streams, choose a good general exit rather than one that
  22793. supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
  22794. - Send a valid END cell back when a client tries to connect to a
  22795. nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
  22796. 840. Patch from rovv.
  22797. - If a broken client asks a non-exit router to connect somewhere,
  22798. do not even do the DNS lookup before rejecting the connection.
  22799. Fixes another case of bug 619. Patch from rovv.
  22800. - Fix another case of assuming, when a specific exit is requested,
  22801. that we know more than the user about what hosts it allows.
  22802. Fixes another case of bug 752. Patch from rovv.
  22803. - Check which hops rendezvous stream cells are associated with to
  22804. prevent possible guess-the-streamid injection attacks from
  22805. intermediate hops. Fixes another case of bug 446. Based on patch
  22806. from rovv.
  22807. - Avoid using a negative right-shift when comparing 32-bit
  22808. addresses. Possible fix for bug 845 and bug 811.
  22809. - Make the assert_circuit_ok() function work correctly on circuits that
  22810. have already been marked for close.
  22811. - Fix read-off-the-end-of-string error in unit tests when decoding
  22812. introduction points.
  22813. - Fix uninitialized size field for memory area allocation: may improve
  22814. memory performance during directory parsing.
  22815. - Treat duplicate certificate fetches as failures, so that we do
  22816. not try to re-fetch an expired certificate over and over and over.
  22817. - Do not say we're fetching a certificate when we'll in fact skip it
  22818. because of a pending download.
  22819. Changes in version 0.2.1.6-alpha - 2008-09-30
  22820. Tor 0.2.1.6-alpha further improves performance and robustness of
  22821. hidden services, starts work on supporting per-country relay selection,
  22822. and fixes a variety of smaller issues.
  22823. o Major features:
  22824. - Implement proposal 121: make it possible to build hidden services
  22825. that only certain clients are allowed to connect to. This is
  22826. enforced at several points, so that unauthorized clients are unable
  22827. to send INTRODUCE cells to the service, or even (depending on the
  22828. type of authentication) to learn introduction points. This feature
  22829. raises the bar for certain kinds of active attacks against hidden
  22830. services. Code by Karsten Loesing.
  22831. - Relays now store and serve v2 hidden service descriptors by default,
  22832. i.e., the new default value for HidServDirectoryV2 is 1. This is
  22833. the last step in proposal 114, which aims to make hidden service
  22834. lookups more reliable.
  22835. - Start work to allow node restrictions to include country codes. The
  22836. syntax to exclude nodes in a country with country code XX is
  22837. "ExcludeNodes {XX}". Patch from Robert Hogan. It still needs some
  22838. refinement to decide what config options should take priority if
  22839. you ask to both use a particular node and exclude it.
  22840. - Allow ExitNodes list to include IP ranges and country codes, just
  22841. like the Exclude*Nodes lists. Patch from Robert Hogan.
  22842. o Major bugfixes:
  22843. - Fix a bug when parsing ports in tor_addr_port_parse() that caused
  22844. Tor to fail to start if you had it configured to use a bridge
  22845. relay. Fixes bug 809. Bugfix on 0.2.1.5-alpha.
  22846. - When extending a circuit to a hidden service directory to upload a
  22847. rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
  22848. requests failed, because the router descriptor had not been
  22849. downloaded yet. In these cases, we now wait until the router
  22850. descriptor is downloaded, and then retry. Likewise, clients
  22851. now skip over a hidden service directory if they don't yet have
  22852. its router descriptor, rather than futilely requesting it and
  22853. putting mysterious complaints in the logs. Fixes bug 767. Bugfix
  22854. on 0.2.0.10-alpha.
  22855. - When fetching v0 and v2 rendezvous service descriptors in parallel,
  22856. we were failing the whole hidden service request when the v0
  22857. descriptor fetch fails, even if the v2 fetch is still pending and
  22858. might succeed. Similarly, if the last v2 fetch fails, we were
  22859. failing the whole hidden service request even if a v0 fetch is
  22860. still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
  22861. - DNS replies need to have names matching their requests, but
  22862. these names should be in the questions section, not necessarily
  22863. in the answers section. Fixes bug 823. Bugfix on 0.2.1.5-alpha.
  22864. o Minor features:
  22865. - Update to the "September 1 2008" ip-to-country file.
  22866. - Allow ports 465 and 587 in the default exit policy again. We had
  22867. rejected them in 0.1.0.15, because back in 2005 they were commonly
  22868. misconfigured and ended up as spam targets. We hear they are better
  22869. locked down these days.
  22870. - Use a lockfile to make sure that two Tor processes are not
  22871. simultaneously running with the same datadir.
  22872. - Serve the latest v3 networkstatus consensus via the control
  22873. port. Use "getinfo dir/status-vote/current/consensus" to fetch it.
  22874. - Better logging about stability/reliability calculations on directory
  22875. servers.
  22876. - Drop the requirement to have an open dir port for storing and
  22877. serving v2 hidden service descriptors.
  22878. - Directory authorities now serve a /tor/dbg-stability.txt URL to
  22879. help debug WFU and MTBF calculations.
  22880. - Implement most of Proposal 152: allow specialized servers to permit
  22881. single-hop circuits, and clients to use those servers to build
  22882. single-hop circuits when using a specialized controller. Patch
  22883. from Josh Albrecht. Resolves feature request 768.
  22884. - Add a -p option to tor-resolve for specifying the SOCKS port: some
  22885. people find host:port too confusing.
  22886. - Make TrackHostExit mappings expire a while after their last use, not
  22887. after their creation. Patch from Robert Hogan.
  22888. - Provide circuit purposes along with circuit events to the controller.
  22889. o Minor bugfixes:
  22890. - Fix compile on OpenBSD 4.4-current. Bugfix on 0.2.1.5-alpha.
  22891. Reported by Tas.
  22892. - Fixed some memory leaks -- some quite frequent, some almost
  22893. impossible to trigger -- based on results from Coverity.
  22894. - When testing for libevent functions, set the LDFLAGS variable
  22895. correctly. Found by Riastradh.
  22896. - Fix an assertion bug in parsing policy-related options; possible fix
  22897. for bug 811.
  22898. - Catch and report a few more bootstrapping failure cases when Tor
  22899. fails to establish a TCP connection. Cleanup on 0.2.1.x.
  22900. - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
  22901. bootstrapping with tunneled directory connections. Bugfix on
  22902. 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
  22903. - When asked to connect to A.B.exit:80, if we don't know the IP for A
  22904. and we know that server B rejects most-but-not all connections to
  22905. port 80, we would previously reject the connection. Now, we assume
  22906. the user knows what they were asking for. Fixes bug 752. Bugfix
  22907. on 0.0.9rc5. Diagnosed by BarkerJr.
  22908. - If we are not using BEGIN_DIR cells, don't attempt to contact hidden
  22909. service directories if they have no advertised dir port. Bugfix
  22910. on 0.2.0.10-alpha.
  22911. - If we overrun our per-second write limits a little, count this as
  22912. having used up our write allocation for the second, and choke
  22913. outgoing directory writes. Previously, we had only counted this when
  22914. we had met our limits precisely. Fixes bug 824. Patch by rovv.
  22915. Bugfix on 0.2.0.x (??).
  22916. - Avoid a "0 divided by 0" calculation when calculating router uptime
  22917. at directory authorities. Bugfix on 0.2.0.8-alpha.
  22918. - Make DNS resolved controller events into "CLOSED", not
  22919. "FAILED". Bugfix on 0.1.2.5-alpha. Fix by Robert Hogan. Resolves
  22920. bug 807.
  22921. - Fix a bug where an unreachable relay would establish enough
  22922. reachability testing circuits to do a bandwidth test -- if
  22923. we already have a connection to the middle hop of the testing
  22924. circuit, then it could establish the last hop by using the existing
  22925. connection. Bugfix on 0.1.2.2-alpha, exposed when we made testing
  22926. circuits no longer use entry guards in 0.2.1.3-alpha.
  22927. - If we have correct permissions on $datadir, we complain to stdout
  22928. and fail to start. But dangerous permissions on
  22929. $datadir/cached-status/ would cause us to open a log and complain
  22930. there. Now complain to stdout and fail to start in both cases. Fixes
  22931. bug 820, reported by seeess.
  22932. - Remove the old v2 directory authority 'lefkada' from the default
  22933. list. It has been gone for many months.
  22934. o Code simplifications and refactoring:
  22935. - Revise the connection_new functions so that a more typesafe variant
  22936. exists. This will work better with Coverity, and let us find any
  22937. actual mistakes we're making here.
  22938. - Refactor unit testing logic so that dmalloc can be used sensibly
  22939. with unit tests to check for memory leaks.
  22940. - Move all hidden-service related fields from connection and circuit
  22941. structure to substructures: this way they won't eat so much memory.
  22942. Changes in version 0.2.0.31 - 2008-09-03
  22943. Tor 0.2.0.31 addresses two potential anonymity issues, starts to fix
  22944. a big bug we're seeing where in rare cases traffic from one Tor stream
  22945. gets mixed into another stream, and fixes a variety of smaller issues.
  22946. o Major bugfixes:
  22947. - Make sure that two circuits can never exist on the same connection
  22948. with the same circuit ID, even if one is marked for close. This
  22949. is conceivably a bugfix for bug 779. Bugfix on 0.1.0.4-rc.
  22950. - Relays now reject risky extend cells: if the extend cell includes
  22951. a digest of all zeroes, or asks to extend back to the relay that
  22952. sent the extend cell, tear down the circuit. Ideas suggested
  22953. by rovv.
  22954. - If not enough of our entry guards are available so we add a new
  22955. one, we might use the new one even if it overlapped with the
  22956. current circuit's exit relay (or its family). Anonymity bugfix
  22957. pointed out by rovv.
  22958. o Minor bugfixes:
  22959. - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
  22960. 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
  22961. - Correctly detect the presence of the linux/netfilter_ipv4.h header
  22962. when building against recent kernels. Bugfix on 0.1.2.1-alpha.
  22963. - Pick size of default geoip filename string correctly on windows.
  22964. Fixes bug 806. Bugfix on 0.2.0.30.
  22965. - Make the autoconf script accept the obsolete --with-ssl-dir
  22966. option as an alias for the actually-working --with-openssl-dir
  22967. option. Fix the help documentation to recommend --with-openssl-dir.
  22968. Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
  22969. - When using the TransPort option on OpenBSD, and using the User
  22970. option to change UID and drop privileges, make sure to open
  22971. /dev/pf before dropping privileges. Fixes bug 782. Patch from
  22972. Christopher Davis. Bugfix on 0.1.2.1-alpha.
  22973. - Try to attach connections immediately upon receiving a RENDEZVOUS2
  22974. or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
  22975. on the client side when connecting to a hidden service. Bugfix
  22976. on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
  22977. - When closing an application-side connection because its circuit is
  22978. getting torn down, generate the stream event correctly. Bugfix on
  22979. 0.1.2.x. Anonymous patch.
  22980. Changes in version 0.2.1.5-alpha - 2008-08-31
  22981. Tor 0.2.1.5-alpha moves us closer to handling IPv6 destinations, puts
  22982. in a lot of the infrastructure for adding authorization to hidden
  22983. services, lays the groundwork for having clients read their load
  22984. balancing information out of the networkstatus consensus rather than
  22985. the individual router descriptors, addresses two potential anonymity
  22986. issues, and fixes a variety of smaller issues.
  22987. o Major features:
  22988. - Convert many internal address representations to optionally hold
  22989. IPv6 addresses.
  22990. - Generate and accept IPv6 addresses in many protocol elements.
  22991. - Make resolver code handle nameservers located at ipv6 addresses.
  22992. - Begin implementation of proposal 121 ("Client authorization for
  22993. hidden services"): configure hidden services with client
  22994. authorization, publish descriptors for them, and configure
  22995. authorization data for hidden services at clients. The next
  22996. step is to actually access hidden services that perform client
  22997. authorization.
  22998. - More progress toward proposal 141: Network status consensus
  22999. documents and votes now contain bandwidth information for each
  23000. router and a summary of that router's exit policy. Eventually this
  23001. will be used by clients so that they do not have to download every
  23002. known descriptor before building circuits.
  23003. o Major bugfixes (on 0.2.0.x and before):
  23004. - When sending CREATED cells back for a given circuit, use a 64-bit
  23005. connection ID to find the right connection, rather than an addr:port
  23006. combination. Now that we can have multiple OR connections between
  23007. the same ORs, it is no longer possible to use addr:port to uniquely
  23008. identify a connection.
  23009. - Relays now reject risky extend cells: if the extend cell includes
  23010. a digest of all zeroes, or asks to extend back to the relay that
  23011. sent the extend cell, tear down the circuit. Ideas suggested
  23012. by rovv.
  23013. - If not enough of our entry guards are available so we add a new
  23014. one, we might use the new one even if it overlapped with the
  23015. current circuit's exit relay (or its family). Anonymity bugfix
  23016. pointed out by rovv.
  23017. o Minor bugfixes:
  23018. - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
  23019. 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
  23020. - When using the TransPort option on OpenBSD, and using the User
  23021. option to change UID and drop privileges, make sure to open /dev/pf
  23022. before dropping privileges. Fixes bug 782. Patch from Christopher
  23023. Davis. Bugfix on 0.1.2.1-alpha.
  23024. - Correctly detect the presence of the linux/netfilter_ipv4.h header
  23025. when building against recent kernels. Bugfix on 0.1.2.1-alpha.
  23026. - Add a missing safe_str() call for a debug log message.
  23027. - Use 64 bits instead of 32 bits for connection identifiers used with
  23028. the controller protocol, to greatly reduce risk of identifier reuse.
  23029. - Make the autoconf script accept the obsolete --with-ssl-dir
  23030. option as an alias for the actually-working --with-openssl-dir
  23031. option. Fix the help documentation to recommend --with-openssl-dir.
  23032. Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
  23033. o Minor features:
  23034. - Rate-limit too-many-sockets messages: when they happen, they happen
  23035. a lot. Resolves bug 748.
  23036. - Resist DNS poisoning a little better by making sure that names in
  23037. answer sections match.
  23038. - Print the SOCKS5 error message string as well as the error code
  23039. when a tor-resolve request fails. Patch from Jacob.
  23040. Changes in version 0.2.1.4-alpha - 2008-08-04
  23041. Tor 0.2.1.4-alpha fixes a pair of crash bugs in 0.2.1.3-alpha.
  23042. o Major bugfixes:
  23043. - The address part of exit policies was not correctly written
  23044. to router descriptors. This generated router descriptors that failed
  23045. their self-checks. Noticed by phobos, fixed by Karsten. Bugfix
  23046. on 0.2.1.3-alpha.
  23047. - Tor triggered a false assert when extending a circuit to a relay
  23048. but we already have a connection open to that relay. Noticed by
  23049. phobos, fixed by Karsten. Bugfix on 0.2.1.3-alpha.
  23050. o Minor bugfixes:
  23051. - Fix a hidden service logging bug: in some edge cases, the router
  23052. descriptor of a previously picked introduction point becomes
  23053. obsolete and we need to give up on it rather than continually
  23054. complaining that it has become obsolete. Observed by xiando. Bugfix
  23055. on 0.2.1.3-alpha.
  23056. o Removed features:
  23057. - Take out the TestVia config option, since it was a workaround for
  23058. a bug that was fixed in Tor 0.1.1.21.
  23059. Changes in version 0.2.1.3-alpha - 2008-08-03
  23060. Tor 0.2.1.3-alpha implements most of the pieces to prevent
  23061. infinite-length circuit attacks (see proposal 110); fixes a bug that
  23062. might cause exit relays to corrupt streams they send back; allows
  23063. address patterns (e.g. 255.128.0.0/16) to appear in ExcludeNodes and
  23064. ExcludeExitNodes config options; and fixes a big pile of bugs.
  23065. o Bootstrapping bugfixes (on 0.2.1.x-alpha):
  23066. - Send a bootstrap problem "warn" event on the first problem if the
  23067. reason is NO_ROUTE (that is, our network is down).
  23068. o Major features:
  23069. - Implement most of proposal 110: The first K cells to be sent
  23070. along a circuit are marked as special "early" cells; only K "early"
  23071. cells will be allowed. Once this code is universal, we can block
  23072. certain kinds of DOS attack by requiring that EXTEND commands must
  23073. be sent using an "early" cell.
  23074. o Major bugfixes:
  23075. - Try to attach connections immediately upon receiving a RENDEZVOUS2
  23076. or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
  23077. on the client side when connecting to a hidden service. Bugfix
  23078. on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
  23079. - Ensure that two circuits can never exist on the same connection
  23080. with the same circuit ID, even if one is marked for close. This
  23081. is conceivably a bugfix for bug 779; fixes a bug on 0.1.0.4-rc.
  23082. o Minor features:
  23083. - When relays do their initial bandwidth measurement, don't limit
  23084. to just our entry guards for the test circuits. Otherwise we tend
  23085. to have multiple test circuits going through a single entry guard,
  23086. which makes our bandwidth test less accurate. Fixes part of bug 654;
  23087. patch contributed by Josh Albrecht.
  23088. - Add an ExcludeExitNodes option so users can list a set of nodes
  23089. that should be be excluded from the exit node position, but
  23090. allowed elsewhere. Implements proposal 151.
  23091. - Allow address patterns (e.g., 255.128.0.0/16) to appear in
  23092. ExcludeNodes and ExcludeExitNodes lists.
  23093. - Change the implementation of ExcludeNodes and ExcludeExitNodes to
  23094. be more efficient. Formerly it was quadratic in the number of
  23095. servers; now it should be linear. Fixes bug 509.
  23096. - Save 16-22 bytes per open circuit by moving the n_addr, n_port,
  23097. and n_conn_id_digest fields into a separate structure that's
  23098. only needed when the circuit has not yet attached to an n_conn.
  23099. o Minor bugfixes:
  23100. - Change the contrib/tor.logrotate script so it makes the new
  23101. logs as "_tor:_tor" rather than the default, which is generally
  23102. "root:wheel". Fixes bug 676, reported by Serge Koksharov.
  23103. - Stop using __attribute__((nonnull)) with GCC: it can give us useful
  23104. warnings (occasionally), but it can also cause the compiler to
  23105. eliminate error-checking code. Suggested by Peter Gutmann.
  23106. - When a hidden service is giving up on an introduction point candidate
  23107. that was not included in the last published rendezvous descriptor,
  23108. don't reschedule publication of the next descriptor. Fixes bug 763.
  23109. Bugfix on 0.0.9.3.
  23110. - Mark RendNodes, RendExcludeNodes, HiddenServiceNodes, and
  23111. HiddenServiceExcludeNodes as obsolete: they never worked properly,
  23112. and nobody claims to be using them. Fixes bug 754. Bugfix on
  23113. 0.1.0.1-rc. Patch from Christian Wilms.
  23114. - Fix a small alignment and memory-wasting bug on buffer chunks.
  23115. Spotted by rovv.
  23116. o Minor bugfixes (controller):
  23117. - When closing an application-side connection because its circuit
  23118. is getting torn down, generate the stream event correctly.
  23119. Bugfix on 0.1.2.x. Anonymous patch.
  23120. o Removed features:
  23121. - Remove all backward-compatibility code to support relays running
  23122. versions of Tor so old that they no longer work at all on the
  23123. Tor network.
  23124. Changes in version 0.2.0.30 - 2008-07-15
  23125. o Minor bugfixes:
  23126. - Stop using __attribute__((nonnull)) with GCC: it can give us useful
  23127. warnings (occasionally), but it can also cause the compiler to
  23128. eliminate error-checking code. Suggested by Peter Gutmann.
  23129. Changes in version 0.2.0.29-rc - 2008-07-08
  23130. Tor 0.2.0.29-rc fixes two big bugs with using bridges, fixes more
  23131. hidden-service performance bugs, and fixes a bunch of smaller bugs.
  23132. o Major bugfixes:
  23133. - If you have more than one bridge but don't know their keys,
  23134. you would only launch a request for the descriptor of the first one
  23135. on your list. (Tor considered launching requests for the others, but
  23136. found that it already had a connection on the way for $0000...0000
  23137. so it didn't open another.) Bugfix on 0.2.0.x.
  23138. - If you have more than one bridge but don't know their keys, and the
  23139. connection to one of the bridges failed, you would cancel all
  23140. pending bridge connections. (After all, they all have the same
  23141. digest.) Bugfix on 0.2.0.x.
  23142. - When a hidden service was trying to establish an introduction point,
  23143. and Tor had built circuits preemptively for such purposes, we
  23144. were ignoring all the preemptive circuits and launching a new one
  23145. instead. Bugfix on 0.2.0.14-alpha.
  23146. - When a hidden service was trying to establish an introduction point,
  23147. and Tor *did* manage to reuse one of the preemptively built
  23148. circuits, it didn't correctly remember which one it used,
  23149. so it asked for another one soon after, until there were no
  23150. more preemptive circuits, at which point it launched one from
  23151. scratch. Bugfix on 0.0.9.x.
  23152. - Make directory servers include the X-Your-Address-Is: http header in
  23153. their responses even for begin_dir conns. Now clients who only
  23154. ever use begin_dir connections still have a way to learn their IP
  23155. address. Fixes bug 737; bugfix on 0.2.0.22-rc. Reported by goldy.
  23156. o Minor bugfixes:
  23157. - Fix a macro/CPP interaction that was confusing some compilers:
  23158. some GCCs don't like #if/#endif pairs inside macro arguments.
  23159. Fixes bug 707.
  23160. - Fix macro collision between OpenSSL 0.9.8h and Windows headers.
  23161. Fixes bug 704; fix from Steven Murdoch.
  23162. - When opening /dev/null in finish_daemonize(), do not pass the
  23163. O_CREAT flag. Fortify was complaining, and correctly so. Fixes
  23164. bug 742; fix from Michael Scherer. Bugfix on 0.0.2pre19.
  23165. - Correctly detect transparent proxy support on Linux hosts that
  23166. require in.h to be included before netfilter_ipv4.h. Patch
  23167. from coderman.
  23168. - Disallow session resumption attempts during the renegotiation
  23169. stage of the v2 handshake protocol. Clients should never be trying
  23170. session resumption at this point, but apparently some did, in
  23171. ways that caused the handshake to fail. Bugfix on 0.2.0.20-rc. Bug
  23172. found by Geoff Goodell.
  23173. Changes in version 0.2.1.2-alpha - 2008-06-20
  23174. Tor 0.2.1.2-alpha includes a new "TestingTorNetwork" config option to
  23175. make it easier to set up your own private Tor network; fixes several
  23176. big bugs with using more than one bridge relay; fixes a big bug with
  23177. offering hidden services quickly after Tor starts; and uses a better
  23178. API for reporting potential bootstrapping problems to the controller.
  23179. o Major features:
  23180. - New TestingTorNetwork config option to allow adjustment of
  23181. previously constant values that, while reasonable, could slow
  23182. bootstrapping. Implements proposal 135. Patch from Karsten.
  23183. o Major bugfixes:
  23184. - If you have more than one bridge but don't know their digests,
  23185. you would only learn a request for the descriptor of the first one
  23186. on your list. (Tor considered launching requests for the others, but
  23187. found that it already had a connection on the way for $0000...0000
  23188. so it didn't open another.) Bugfix on 0.2.0.x.
  23189. - If you have more than one bridge but don't know their digests,
  23190. and the connection to one of the bridges failed, you would cancel
  23191. all pending bridge connections. (After all, they all have the
  23192. same digest.) Bugfix on 0.2.0.x.
  23193. - When establishing a hidden service, introduction points that
  23194. originate from cannibalized circuits are completely ignored and not
  23195. included in rendezvous service descriptors. This might be another
  23196. reason for delay in making a hidden service available. Bugfix
  23197. from long ago (0.0.9.x?)
  23198. o Minor features:
  23199. - Allow OpenSSL to use dynamic locks if it wants.
  23200. - When building a consensus, do not include routers that are down.
  23201. This will cut down 30% to 40% on consensus size. Implements
  23202. proposal 138.
  23203. - In directory authorities' approved-routers files, allow
  23204. fingerprints with or without space.
  23205. - Add a "GETINFO /status/bootstrap-phase" controller option, so the
  23206. controller can query our current bootstrap state in case it attaches
  23207. partway through and wants to catch up.
  23208. - Send an initial "Starting" bootstrap status event, so we have a
  23209. state to start out in.
  23210. o Minor bugfixes:
  23211. - Asking for a conditional consensus at .../consensus/<fingerprints>
  23212. would crash a dirserver if it did not already have a
  23213. consensus. Bugfix on 0.2.1.1-alpha.
  23214. - Clean up some macro/CPP interactions: some GCC versions don't like
  23215. #if/#endif pairs inside macro arguments. Fixes bug 707. Bugfix on
  23216. 0.2.0.x.
  23217. o Bootstrapping bugfixes (on 0.2.1.1-alpha):
  23218. - Directory authorities shouldn't complain about bootstrapping
  23219. problems just because they do a lot of reachability testing and
  23220. some of the connection attempts fail.
  23221. - Start sending "count" and "recommendation" key/value pairs in
  23222. bootstrap problem status events, so the controller can hear about
  23223. problems even before Tor decides they're worth reporting for sure.
  23224. - If you're using bridges, generate "bootstrap problem" warnings
  23225. as soon as you run out of working bridges, rather than waiting
  23226. for ten failures -- which will never happen if you have less than
  23227. ten bridges.
  23228. - If we close our OR connection because there's been a circuit
  23229. pending on it for too long, we were telling our bootstrap status
  23230. events "REASON=NONE". Now tell them "REASON=TIMEOUT".
  23231. Changes in version 0.2.1.1-alpha - 2008-06-13
  23232. Tor 0.2.1.1-alpha fixes a lot of memory fragmentation problems that
  23233. were making the Tor process bloat especially on Linux; makes our TLS
  23234. handshake blend in better; sends "bootstrap phase" status events to
  23235. the controller, so it can keep the user informed of progress (and
  23236. problems) fetching directory information and establishing circuits;
  23237. and adds a variety of smaller features.
  23238. o Major features:
  23239. - More work on making our TLS handshake blend in: modify the list
  23240. of ciphers advertised by OpenSSL in client mode to even more
  23241. closely resemble a common web browser. We cheat a little so that
  23242. we can advertise ciphers that the locally installed OpenSSL doesn't
  23243. know about.
  23244. - Start sending "bootstrap phase" status events to the controller,
  23245. so it can keep the user informed of progress fetching directory
  23246. information and establishing circuits. Also inform the controller
  23247. if we think we're stuck at a particular bootstrap phase. Implements
  23248. proposal 137.
  23249. - Resume using OpenSSL's RAND_poll() for better (and more portable)
  23250. cross-platform entropy collection again. We used to use it, then
  23251. stopped using it because of a bug that could crash systems that
  23252. called RAND_poll when they had a lot of fds open. It looks like the
  23253. bug got fixed in late 2006. Our new behavior is to call RAND_poll()
  23254. at startup, and to call RAND_poll() when we reseed later only if
  23255. we have a non-buggy OpenSSL version.
  23256. o Major bugfixes:
  23257. - When we choose to abandon a new entry guard because we think our
  23258. older ones might be better, close any circuits pending on that
  23259. new entry guard connection. This fix should make us recover much
  23260. faster when our network is down and then comes back. Bugfix on
  23261. 0.1.2.8-beta; found by lodger.
  23262. o Memory fixes and improvements:
  23263. - Add a malloc_good_size implementation to OpenBSD_malloc_linux.c,
  23264. to avoid unused RAM in buffer chunks and memory pools.
  23265. - Speed up parsing and cut down on memory fragmentation by using
  23266. stack-style allocations for parsing directory objects. Previously,
  23267. this accounted for over 40% of allocations from within Tor's code
  23268. on a typical directory cache.
  23269. - Use a Bloom filter rather than a digest-based set to track which
  23270. descriptors we need to keep around when we're cleaning out old
  23271. router descriptors. This speeds up the computation significantly,
  23272. and may reduce fragmentation.
  23273. - Reduce the default smartlist size from 32 to 16; it turns out that
  23274. most smartlists hold around 8-12 elements tops.
  23275. - Make dumpstats() log the fullness and size of openssl-internal
  23276. buffers.
  23277. - If the user has applied the experimental SSL_MODE_RELEASE_BUFFERS
  23278. patch to their OpenSSL, turn it on to save memory on servers. This
  23279. patch will (with any luck) get included in a mainline distribution
  23280. before too long.
  23281. - Never use OpenSSL compression: it wastes RAM and CPU trying to
  23282. compress cells, which are basically all encrypted, compressed,
  23283. or both.
  23284. o Minor bugfixes:
  23285. - Stop reloading the router list from disk for no reason when we
  23286. run out of reachable directory mirrors. Once upon a time reloading
  23287. it would set the 'is_running' flag back to 1 for them. It hasn't
  23288. done that for a long time.
  23289. - In very rare situations new hidden service descriptors were
  23290. published earlier than 30 seconds after the last change to the
  23291. service. (We currently think that a hidden service descriptor
  23292. that's been stable for 30 seconds is worth publishing.)
  23293. o Minor features:
  23294. - Allow separate log levels to be configured for different logging
  23295. domains. For example, this allows one to log all notices, warnings,
  23296. or errors, plus all memory management messages of level debug or
  23297. higher, with: Log [MM] debug-err [*] notice-err file /var/log/tor.
  23298. - Add a couple of extra warnings to --enable-gcc-warnings for GCC 4.3,
  23299. and stop using a warning that had become unfixably verbose under
  23300. GCC 4.3.
  23301. - New --hush command-line option similar to --quiet. While --quiet
  23302. disables all logging to the console on startup, --hush limits the
  23303. output to messages of warning and error severity.
  23304. - Servers support a new URL scheme for consensus downloads that
  23305. allows the client to specify which authorities are trusted.
  23306. The server then only sends the consensus if the client will trust
  23307. it. Otherwise a 404 error is sent back. Clients use this
  23308. new scheme when the server supports it (meaning it's running
  23309. 0.2.1.1-alpha or later). Implements proposal 134.
  23310. - New configure/torrc options (--enable-geoip-stats,
  23311. DirRecordUsageByCountry) to record how many IPs we've served
  23312. directory info to in each country code, how many status documents
  23313. total we've sent to each country code, and what share of the total
  23314. directory requests we should expect to see.
  23315. - Use the TLS1 hostname extension to more closely resemble browser
  23316. behavior.
  23317. - Lots of new unit tests.
  23318. - Add a macro to implement the common pattern of iterating through
  23319. two parallel lists in lockstep.
  23320. Changes in version 0.2.0.28-rc - 2008-06-13
  23321. Tor 0.2.0.28-rc fixes an anonymity-related bug, fixes a hidden-service
  23322. performance bug, and fixes a bunch of smaller bugs.
  23323. o Anonymity fixes:
  23324. - Fix a bug where, when we were choosing the 'end stream reason' to
  23325. put in our relay end cell that we send to the exit relay, Tor
  23326. clients on Windows were sometimes sending the wrong 'reason'. The
  23327. anonymity problem is that exit relays may be able to guess whether
  23328. the client is running Windows, thus helping partition the anonymity
  23329. set. Down the road we should stop sending reasons to exit relays,
  23330. or otherwise prevent future versions of this bug.
  23331. o Major bugfixes:
  23332. - While setting up a hidden service, some valid introduction circuits
  23333. were overlooked and abandoned. This might be the reason for
  23334. the long delay in making a hidden service available. Bugfix on
  23335. 0.2.0.14-alpha.
  23336. o Minor features:
  23337. - Update to the "June 9 2008" ip-to-country file.
  23338. - Run 'make test' as part of 'make dist', so we stop releasing so
  23339. many development snapshots that fail their unit tests.
  23340. o Minor bugfixes:
  23341. - When we're checking if we have enough dir info for each relay
  23342. to begin establishing circuits, make sure that we actually have
  23343. the descriptor listed in the consensus, not just any descriptor.
  23344. Bugfix on 0.1.2.x.
  23345. - Bridge relays no longer print "xx=0" in their extrainfo document
  23346. for every single country code in the geoip db. Bugfix on
  23347. 0.2.0.27-rc.
  23348. - Only warn when we fail to load the geoip file if we were planning to
  23349. include geoip stats in our extrainfo document. Bugfix on 0.2.0.27-rc.
  23350. - If we change our MaxAdvertisedBandwidth and then reload torrc,
  23351. Tor won't realize it should publish a new relay descriptor. Fixes
  23352. bug 688, reported by mfr. Bugfix on 0.1.2.x.
  23353. - When we haven't had any application requests lately, don't bother
  23354. logging that we have expired a bunch of descriptors. Bugfix
  23355. on 0.1.2.x.
  23356. - Make relay cells written on a connection count as non-padding when
  23357. tracking how long a connection has been in use. Bugfix on
  23358. 0.2.0.1-alpha. Spotted by lodger.
  23359. - Fix unit tests in 0.2.0.27-rc.
  23360. - Fix compile on Windows.
  23361. Changes in version 0.2.0.27-rc - 2008-06-03
  23362. Tor 0.2.0.27-rc adds a few features we left out of the earlier
  23363. release candidates. In particular, we now include an IP-to-country
  23364. GeoIP database, so controllers can easily look up what country a
  23365. given relay is in, and so bridge relays can give us some sanitized
  23366. summaries about which countries are making use of bridges. (See proposal
  23367. 126-geoip-fetching.txt for details.)
  23368. o Major features:
  23369. - Include an IP-to-country GeoIP file in the tarball, so bridge
  23370. relays can report sanitized summaries of the usage they're seeing.
  23371. o Minor features:
  23372. - Add a "PURPOSE=" argument to "STREAM NEW" events, as suggested by
  23373. Robert Hogan. Fixes the first part of bug 681.
  23374. - Make bridge authorities never serve extrainfo docs.
  23375. - Add support to detect Libevent versions in the 1.4.x series
  23376. on mingw.
  23377. - Fix build on gcc 4.3 with --enable-gcc-warnings set.
  23378. - Include a new contrib/tor-exit-notice.html file that exit relay
  23379. operators can put on their website to help reduce abuse queries.
  23380. o Minor bugfixes:
  23381. - When tunneling an encrypted directory connection, and its first
  23382. circuit fails, do not leave it unattached and ask the controller
  23383. to deal. Fixes the second part of bug 681.
  23384. - Make bridge authorities correctly expire old extrainfo documents
  23385. from time to time.
  23386. Changes in version 0.2.0.26-rc - 2008-05-13
  23387. Tor 0.2.0.26-rc fixes a major security vulnerability caused by a bug
  23388. in Debian's OpenSSL packages. All users running any 0.2.0.x version
  23389. should upgrade, whether they're running Debian or not.
  23390. o Major security fixes:
  23391. - Use new V3 directory authority keys on the tor26, gabelmoo, and
  23392. moria1 V3 directory authorities. The old keys were generated with
  23393. a vulnerable version of Debian's OpenSSL package, and must be
  23394. considered compromised. Other authorities' keys were not generated
  23395. with an affected version of OpenSSL.
  23396. o Major bugfixes:
  23397. - List authority signatures as "unrecognized" based on DirServer
  23398. lines, not on cert cache. Bugfix on 0.2.0.x.
  23399. o Minor features:
  23400. - Add a new V3AuthUseLegacyKey option to make it easier for
  23401. authorities to change their identity keys if they have to.
  23402. Changes in version 0.2.0.25-rc - 2008-04-23
  23403. Tor 0.2.0.25-rc makes Tor work again on OS X and certain BSDs.
  23404. o Major bugfixes:
  23405. - Remember to initialize threading before initializing logging.
  23406. Otherwise, many BSD-family implementations will crash hard on
  23407. startup. Fixes bug 671. Bugfix on 0.2.0.24-rc.
  23408. o Minor bugfixes:
  23409. - Authorities correctly free policies on bad servers on
  23410. exit. Fixes bug 672. Bugfix on 0.2.0.x.
  23411. Changes in version 0.2.0.24-rc - 2008-04-22
  23412. Tor 0.2.0.24-rc adds dizum (run by Alex de Joode) as the new sixth
  23413. v3 directory authority, makes relays with dynamic IP addresses and no
  23414. DirPort notice more quickly when their IP address changes, fixes a few
  23415. rare crashes and memory leaks, and fixes a few other miscellaneous bugs.
  23416. o New directory authorities:
  23417. - Take lefkada out of the list of v3 directory authorities, since
  23418. it has been down for months.
  23419. - Set up dizum (run by Alex de Joode) as the new sixth v3 directory
  23420. authority.
  23421. o Major bugfixes:
  23422. - Detect address changes more quickly on non-directory mirror
  23423. relays. Bugfix on 0.2.0.18-alpha; fixes bug 652.
  23424. o Minor features (security):
  23425. - Reject requests for reverse-dns lookup of names that are in
  23426. a private address space. Patch from lodger.
  23427. - Non-exit relays no longer allow DNS requests. Fixes bug 619. Patch
  23428. from lodger.
  23429. o Minor bugfixes (crashes):
  23430. - Avoid a rare assert that can trigger when Tor doesn't have much
  23431. directory information yet and it tries to fetch a v2 hidden
  23432. service descriptor. Fixes bug 651, reported by nwf.
  23433. - Initialize log mutex before initializing dmalloc. Otherwise,
  23434. running with dmalloc would crash. Bugfix on 0.2.0.x-alpha.
  23435. - Use recursive pthread mutexes in order to avoid deadlock when
  23436. logging debug-level messages to a controller. Bug spotted by nwf,
  23437. bugfix on 0.2.0.16-alpha.
  23438. o Minor bugfixes (resource management):
  23439. - Keep address policies from leaking memory: start their refcount
  23440. at 1, not 2. Bugfix on 0.2.0.16-alpha.
  23441. - Free authority certificates on exit, so they don't look like memory
  23442. leaks. Bugfix on 0.2.0.19-alpha.
  23443. - Free static hashtables for policy maps and for TLS connections on
  23444. shutdown, so they don't look like memory leaks. Bugfix on 0.2.0.x.
  23445. - Avoid allocating extra space when computing consensuses on 64-bit
  23446. platforms. Bug spotted by aakova.
  23447. o Minor bugfixes (misc):
  23448. - Do not read the configuration file when we've only been told to
  23449. generate a password hash. Fixes bug 643. Bugfix on 0.0.9pre5. Fix
  23450. based on patch from Sebastian Hahn.
  23451. - Exit relays that are used as a client can now reach themselves
  23452. using the .exit notation, rather than just launching an infinite
  23453. pile of circuits. Fixes bug 641. Reported by Sebastian Hahn.
  23454. - When attempting to open a logfile fails, tell us why.
  23455. - Fix a dumb bug that was preventing us from knowing that we should
  23456. preemptively build circuits to handle expected directory requests.
  23457. Fixes bug 660. Bugfix on 0.1.2.x.
  23458. - Warn less verbosely about clock skew from netinfo cells from
  23459. untrusted sources. Fixes bug 663.
  23460. - Make controller stream events for DNS requests more consistent,
  23461. by adding "new stream" events for DNS requests, and removing
  23462. spurious "stream closed" events" for cached reverse resolves.
  23463. Patch from mwenge. Fixes bug 646.
  23464. - Correctly notify one-hop connections when a circuit build has
  23465. failed. Possible fix for bug 669. Found by lodger.
  23466. Changes in version 0.2.0.23-rc - 2008-03-24
  23467. Tor 0.2.0.23-rc is the fourth release candidate for the 0.2.0 series. It
  23468. makes bootstrapping faster if the first directory mirror you contact
  23469. is down. The bundles also include the new Vidalia 0.1.2 release.
  23470. o Major bugfixes:
  23471. - When a tunneled directory request is made to a directory server
  23472. that's down, notice after 30 seconds rather than 120 seconds. Also,
  23473. fail any begindir streams that are pending on it, so they can
  23474. retry elsewhere. This was causing multi-minute delays on bootstrap.
  23475. Changes in version 0.2.0.22-rc - 2008-03-18
  23476. Tor 0.2.0.22-rc is the third release candidate for the 0.2.0 series. It
  23477. enables encrypted directory connections by default for non-relays, fixes
  23478. some broken TLS behavior we added in 0.2.0.20-rc, and resolves many
  23479. other bugs. The bundles also include Vidalia 0.1.1 and Torbutton 1.1.17.
  23480. o Major features:
  23481. - Enable encrypted directory connections by default for non-relays,
  23482. so censor tools that block Tor directory connections based on their
  23483. plaintext patterns will no longer work. This means Tor works in
  23484. certain censored countries by default again.
  23485. o Major bugfixes:
  23486. - Make sure servers always request certificates from clients during
  23487. TLS renegotiation. Reported by lodger; bugfix on 0.2.0.20-rc.
  23488. - Do not enter a CPU-eating loop when a connection is closed in
  23489. the middle of client-side TLS renegotiation. Fixes bug 622. Bug
  23490. diagnosed by lodger; bugfix on 0.2.0.20-rc.
  23491. - Fix assertion failure that could occur when a blocked circuit
  23492. became unblocked, and it had pending client DNS requests. Bugfix
  23493. on 0.2.0.1-alpha. Fixes bug 632.
  23494. o Minor bugfixes (on 0.1.2.x):
  23495. - Generate "STATUS_SERVER" events rather than misspelled
  23496. "STATUS_SEVER" events. Caught by mwenge.
  23497. - When counting the number of bytes written on a TLS connection,
  23498. look at the BIO actually used for writing to the network, not
  23499. at the BIO used (sometimes) to buffer data for the network.
  23500. Looking at different BIOs could result in write counts on the
  23501. order of ULONG_MAX. Fixes bug 614.
  23502. - On Windows, correctly detect errors when listing the contents of
  23503. a directory. Fix from lodger.
  23504. o Minor bugfixes (on 0.2.0.x):
  23505. - Downgrade "sslv3 alert handshake failure" message to INFO.
  23506. - If we set RelayBandwidthRate and RelayBandwidthBurst very high but
  23507. left BandwidthRate and BandwidthBurst at the default, we would be
  23508. silently limited by those defaults. Now raise them to match the
  23509. RelayBandwidth* values.
  23510. - Fix the SVK version detection logic to work correctly on a branch.
  23511. - Make --enable-openbsd-malloc work correctly on Linux with alpha
  23512. CPUs. Fixes bug 625.
  23513. - Logging functions now check that the passed severity is sane.
  23514. - Use proper log levels in the testsuite call of
  23515. get_interface_address6().
  23516. - When using a nonstandard malloc, do not use the platform values for
  23517. HAVE_MALLOC_GOOD_SIZE or HAVE_MALLOC_USABLE_SIZE.
  23518. - Make the openbsd malloc code use 8k pages on alpha CPUs and
  23519. 16k pages on ia64.
  23520. - Detect mismatched page sizes when using --enable-openbsd-malloc.
  23521. - Avoid double-marked-for-close warning when certain kinds of invalid
  23522. .in-addr.arpa addresses are passed to the DNSPort. Part of a fix
  23523. for bug 617. Bugfix on 0.2.0.1-alpha.
  23524. - Make sure that the "NULL-means-reject *:*" convention is followed by
  23525. all the policy manipulation functions, avoiding some possible crash
  23526. bugs. Bug found by lodger. Bugfix on 0.2.0.16-alpha.
  23527. - Fix the implementation of ClientDNSRejectInternalAddresses so that it
  23528. actually works, and doesn't warn about every single reverse lookup.
  23529. Fixes the other part of bug 617. Bugfix on 0.2.0.1-alpha.
  23530. o Minor features:
  23531. - Only log guard node status when guard node status has changed.
  23532. - Downgrade the 3 most common "INFO" messages to "DEBUG". This will
  23533. make "INFO" 75% less verbose.
  23534. Changes in version 0.2.0.21-rc - 2008-03-02
  23535. Tor 0.2.0.21-rc is the second release candidate for the 0.2.0 series. It
  23536. makes Tor work well with Vidalia again, fixes a rare assert bug,
  23537. and fixes a pair of more minor bugs. The bundles also include Vidalia
  23538. 0.1.0 and Torbutton 1.1.16.
  23539. o Major bugfixes:
  23540. - The control port should declare that it requires password auth
  23541. when HashedControlSessionPassword is set too. Patch from Matt Edman;
  23542. bugfix on 0.2.0.20-rc. Fixes bug 615.
  23543. - Downgrade assert in connection_buckets_decrement() to a log message.
  23544. This may help us solve bug 614, and in any case will make its
  23545. symptoms less severe. Bugfix on 0.2.0.20-rc. Reported by fredzupy.
  23546. - We were sometimes miscounting the number of bytes read from the
  23547. network, causing our rate limiting to not be followed exactly.
  23548. Bugfix on 0.2.0.16-alpha. Reported by lodger.
  23549. o Minor bugfixes:
  23550. - Fix compilation with OpenSSL 0.9.8 and 0.9.8a. All other supported
  23551. OpenSSL versions should have been working fine. Diagnosis and patch
  23552. from lodger, Karsten Loesing, and Sebastian Hahn. Fixes bug 616.
  23553. Bugfix on 0.2.0.20-rc.
  23554. Changes in version 0.2.0.20-rc - 2008-02-24
  23555. Tor 0.2.0.20-rc is the first release candidate for the 0.2.0 series. It
  23556. makes more progress towards normalizing Tor's TLS handshake, makes
  23557. hidden services work better again, helps relays bootstrap if they don't
  23558. know their IP address, adds optional support for linking in openbsd's
  23559. allocator or tcmalloc, allows really fast relays to scale past 15000
  23560. sockets, and fixes a bunch of minor bugs reported by Veracode.
  23561. o Major features:
  23562. - Enable the revised TLS handshake based on the one designed by
  23563. Steven Murdoch in proposal 124, as revised in proposal 130. It
  23564. includes version negotiation for OR connections as described in
  23565. proposal 105. The new handshake is meant to be harder for censors
  23566. to fingerprint, and it adds the ability to detect certain kinds of
  23567. man-in-the-middle traffic analysis attacks. The version negotiation
  23568. feature will allow us to improve Tor's link protocol more safely
  23569. in the future.
  23570. - Choose which bridge to use proportional to its advertised bandwidth,
  23571. rather than uniformly at random. This should speed up Tor for
  23572. bridge users. Also do this for people who set StrictEntryNodes.
  23573. - When a TrackHostExits-chosen exit fails too many times in a row,
  23574. stop using it. Bugfix on 0.1.2.x; fixes bug 437.
  23575. o Major bugfixes:
  23576. - Resolved problems with (re-)fetching hidden service descriptors.
  23577. Patch from Karsten Loesing; fixes problems with 0.2.0.18-alpha
  23578. and 0.2.0.19-alpha.
  23579. - If we only ever used Tor for hidden service lookups or posts, we
  23580. would stop building circuits and start refusing connections after
  23581. 24 hours, since we falsely believed that Tor was dormant. Reported
  23582. by nwf; bugfix on 0.1.2.x.
  23583. - Servers that don't know their own IP address should go to the
  23584. authorities for their first directory fetch, even if their DirPort
  23585. is off or if they don't know they're reachable yet. This will help
  23586. them bootstrap better. Bugfix on 0.2.0.18-alpha; fixes bug 609.
  23587. - When counting the number of open sockets, count not only the number
  23588. of sockets we have received from the socket() call, but also
  23589. the number we've gotten from accept() and socketpair(). This bug
  23590. made us fail to count all sockets that we were using for incoming
  23591. connections. Bugfix on 0.2.0.x.
  23592. - Fix code used to find strings within buffers, when those strings
  23593. are not in the first chunk of the buffer. Bugfix on 0.2.0.x.
  23594. - Fix potential segfault when parsing HTTP headers. Bugfix on 0.2.0.x.
  23595. - Add a new __HashedControlSessionPassword option for controllers
  23596. to use for one-off session password hashes that shouldn't get
  23597. saved to disk by SAVECONF --- Vidalia users were accumulating a
  23598. pile of HashedControlPassword lines in their torrc files, one for
  23599. each time they had restarted Tor and then clicked Save. Make Tor
  23600. automatically convert "HashedControlPassword" to this new option but
  23601. only when it's given on the command line. Partial fix for bug 586.
  23602. o Minor features (performance):
  23603. - Tune parameters for cell pool allocation to minimize amount of
  23604. RAM overhead used.
  23605. - Add OpenBSD malloc code from phk as an optional malloc
  23606. replacement on Linux: some glibc libraries do very poorly
  23607. with Tor's memory allocation patterns. Pass
  23608. --enable-openbsd-malloc to get the replacement malloc code.
  23609. - Add a --with-tcmalloc option to the configure script to link
  23610. against tcmalloc (if present). Does not yet search for
  23611. non-system include paths.
  23612. - Stop imposing an arbitrary maximum on the number of file descriptors
  23613. used for busy servers. Bug reported by Olaf Selke; patch from
  23614. Sebastian Hahn.
  23615. o Minor features (other):
  23616. - When SafeLogging is disabled, log addresses along with all TLS
  23617. errors.
  23618. - When building with --enable-gcc-warnings, check for whether Apple's
  23619. warning "-Wshorten-64-to-32" is available.
  23620. - Add a --passphrase-fd argument to the tor-gencert command for
  23621. scriptability.
  23622. o Minor bugfixes (memory leaks and code problems):
  23623. - We were leaking a file descriptor if Tor started with a zero-length
  23624. cached-descriptors file. Patch by freddy77; bugfix on 0.1.2.
  23625. - Detect size overflow in zlib code. Reported by Justin Ferguson and
  23626. Dan Kaminsky.
  23627. - We were comparing the raw BridgePassword entry with a base64'ed
  23628. version of it, when handling a "/tor/networkstatus-bridges"
  23629. directory request. Now compare correctly. Noticed by Veracode.
  23630. - Recover from bad tracked-since value in MTBF-history file.
  23631. Should fix bug 537.
  23632. - Alter the code that tries to recover from unhandled write
  23633. errors, to not try to flush onto a socket that's given us
  23634. unhandled errors. Bugfix on 0.1.2.x.
  23635. - Make Unix controlsockets work correctly on OpenBSD. Patch from
  23636. tup. Bugfix on 0.2.0.3-alpha.
  23637. o Minor bugfixes (other):
  23638. - If we have an extra-info document for our server, always make
  23639. it available on the control port, even if we haven't gotten
  23640. a copy of it from an authority yet. Patch from mwenge.
  23641. - Log the correct memory chunk sizes for empty RAM chunks in mempool.c.
  23642. - Directory mirrors no longer include a guess at the client's IP
  23643. address if the connection appears to be coming from the same /24
  23644. network; it was producing too many wrong guesses.
  23645. - Make the new hidden service code respect the SafeLogging setting.
  23646. Bugfix on 0.2.0.x. Patch from Karsten.
  23647. - When starting as an authority, do not overwrite all certificates
  23648. cached from other authorities. Bugfix on 0.2.0.x. Fixes bug 606.
  23649. - If we're trying to flush the last bytes on a connection (for
  23650. example, when answering a directory request), reset the
  23651. time-to-give-up timeout every time we manage to write something
  23652. on the socket. Bugfix on 0.1.2.x.
  23653. - Change the behavior of "getinfo status/good-server-descriptor"
  23654. so it doesn't return failure when any authority disappears.
  23655. - Even though the man page said that "TrackHostExits ." should
  23656. work, nobody had ever implemented it. Bugfix on 0.1.0.x.
  23657. - Report TLS "zero return" case as a "clean close" and "IO error"
  23658. as a "close". Stop calling closes "unexpected closes": existing
  23659. Tors don't use SSL_close(), so having a connection close without
  23660. the TLS shutdown handshake is hardly unexpected.
  23661. - Send NAMESERVER_STATUS messages for a single failed nameserver
  23662. correctly.
  23663. o Code simplifications and refactoring:
  23664. - Remove the tor_strpartition function: its logic was confused,
  23665. and it was only used for one thing that could be implemented far
  23666. more easily.
  23667. Changes in version 0.2.0.19-alpha - 2008-02-09
  23668. Tor 0.2.0.19-alpha makes more progress towards normalizing Tor's TLS
  23669. handshake, makes path selection for relays more secure and IP address
  23670. guessing more robust, and generally fixes a lot of bugs in preparation
  23671. for calling the 0.2.0 branch stable.
  23672. o Major features:
  23673. - Do not include recognizeable strings in the commonname part of
  23674. Tor's x509 certificates.
  23675. o Major bugfixes:
  23676. - If we're a relay, avoid picking ourselves as an introduction point,
  23677. a rendezvous point, or as the final hop for internal circuits. Bug
  23678. reported by taranis and lodger. Bugfix on 0.1.2.x.
  23679. - Patch from "Andrew S. Lists" to catch when we contact a directory
  23680. mirror at IP address X and he says we look like we're coming from
  23681. IP address X. Bugfix on 0.1.2.x.
  23682. o Minor features (security):
  23683. - Be more paranoid about overwriting sensitive memory on free(),
  23684. as a defensive programming tactic to ensure forward secrecy.
  23685. o Minor features (directory authority):
  23686. - Actually validate the options passed to AuthDirReject,
  23687. AuthDirInvalid, AuthDirBadDir, and AuthDirBadExit.
  23688. - Reject router descriptors with out-of-range bandwidthcapacity or
  23689. bandwidthburst values.
  23690. o Minor features (controller):
  23691. - Reject controller commands over 1MB in length. This keeps rogue
  23692. processes from running us out of memory.
  23693. o Minor features (misc):
  23694. - Give more descriptive well-formedness errors for out-of-range
  23695. hidden service descriptor/protocol versions.
  23696. - Make memory debugging information describe more about history
  23697. of cell allocation, so we can help reduce our memory use.
  23698. o Deprecated features (controller):
  23699. - The status/version/num-versioning and status/version/num-concurring
  23700. GETINFO options are no longer useful in the v3 directory protocol:
  23701. treat them as deprecated, and warn when they're used.
  23702. o Minor bugfixes:
  23703. - When our consensus networkstatus has been expired for a while, stop
  23704. being willing to build circuits using it. Fixes bug 401. Bugfix
  23705. on 0.1.2.x.
  23706. - Directory caches now fetch certificates from all authorities
  23707. listed in a networkstatus consensus, even when they do not
  23708. recognize them. Fixes bug 571. Bugfix on 0.2.0.x.
  23709. - When connecting to a bridge without specifying its key, insert
  23710. the connection into the identity-to-connection map as soon as
  23711. a key is learned. Fixes bug 574. Bugfix on 0.2.0.x.
  23712. - Detect versions of OS X where malloc_good_size() is present in the
  23713. library but never actually declared. Resolves bug 587. Bugfix
  23714. on 0.2.0.x.
  23715. - Stop incorrectly truncating zlib responses to directory authority
  23716. signature download requests. Fixes bug 593. Bugfix on 0.2.0.x.
  23717. - Stop recommending that every server operator send mail to tor-ops.
  23718. Resolves bug 597. Bugfix on 0.1.2.x.
  23719. - Don't trigger an assert if we start a directory authority with a
  23720. private IP address (like 127.0.0.1).
  23721. - Avoid possible failures when generating a directory with routers
  23722. with over-long versions strings, or too many flags set. Bugfix
  23723. on 0.1.2.x.
  23724. - If an attempt to launch a DNS resolve request over the control
  23725. port fails because we have overrun the limit on the number of
  23726. connections, tell the controller that the request has failed.
  23727. - Avoid using too little bandwidth when our clock skips a few
  23728. seconds. Bugfix on 0.1.2.x.
  23729. - Fix shell error when warning about missing packages in configure
  23730. script, on Fedora or Red Hat machines. Bugfix on 0.2.0.x.
  23731. - Do not become confused when receiving a spurious VERSIONS-like
  23732. cell from a confused v1 client. Bugfix on 0.2.0.x.
  23733. - Re-fetch v2 (as well as v0) rendezvous descriptors when all
  23734. introduction points for a hidden service have failed. Patch from
  23735. Karsten Loesing. Bugfix on 0.2.0.x.
  23736. o Code simplifications and refactoring:
  23737. - Remove some needless generality from cpuworker code, for improved
  23738. type-safety.
  23739. - Stop overloading the circuit_t.onionskin field for both "onionskin
  23740. from a CREATE cell that we are waiting for a cpuworker to be
  23741. assigned" and "onionskin from an EXTEND cell that we are going to
  23742. send to an OR as soon as we are connected". Might help with bug 600.
  23743. - Add an in-place version of aes_crypt() so that we can avoid doing a
  23744. needless memcpy() call on each cell payload.
  23745. Changes in version 0.2.0.18-alpha - 2008-01-25
  23746. Tor 0.2.0.18-alpha adds a sixth v3 directory authority run by CCC,
  23747. fixes a big memory leak in 0.2.0.17-alpha, and adds new config options
  23748. that can warn or reject connections to ports generally associated with
  23749. vulnerable-plaintext protocols.
  23750. o New directory authorities:
  23751. - Set up dannenberg (run by CCC) as the sixth v3 directory
  23752. authority.
  23753. o Major bugfixes:
  23754. - Fix a major memory leak when attempting to use the v2 TLS
  23755. handshake code. Bugfix on 0.2.0.x; fixes bug 589.
  23756. - We accidentally enabled the under-development v2 TLS handshake
  23757. code, which was causing log entries like "TLS error while
  23758. renegotiating handshake". Disable it again. Resolves bug 590.
  23759. - We were computing the wrong Content-Length: header for directory
  23760. responses that need to be compressed on the fly, causing clients
  23761. asking for those items to always fail. Bugfix on 0.2.0.x; partially
  23762. fixes bug 593.
  23763. o Major features:
  23764. - Avoid going directly to the directory authorities even if you're a
  23765. relay, if you haven't found yourself reachable yet or if you've
  23766. decided not to advertise your dirport yet. Addresses bug 556.
  23767. - If we've gone 12 hours since our last bandwidth check, and we
  23768. estimate we have less than 50KB bandwidth capacity but we could
  23769. handle more, do another bandwidth test.
  23770. - New config options WarnPlaintextPorts and RejectPlaintextPorts so
  23771. Tor can warn and/or refuse connections to ports commonly used with
  23772. vulnerable-plaintext protocols. Currently we warn on ports 23,
  23773. 109, 110, and 143, but we don't reject any.
  23774. o Minor bugfixes:
  23775. - When we setconf ClientOnly to 1, close any current OR and Dir
  23776. listeners. Reported by mwenge.
  23777. - When we get a consensus that's been signed by more people than
  23778. we expect, don't log about it; it's not a big deal. Reported
  23779. by Kyle Williams.
  23780. o Minor features:
  23781. - Don't answer "/tor/networkstatus-bridges" directory requests if
  23782. the request isn't encrypted.
  23783. - Make "ClientOnly 1" config option disable directory ports too.
  23784. - Patches from Karsten Loesing to make v2 hidden services more
  23785. robust: work even when there aren't enough HSDir relays available;
  23786. retry when a v2 rend desc fetch fails; but don't retry if we
  23787. already have a usable v0 rend desc.
  23788. Changes in version 0.2.0.17-alpha - 2008-01-17
  23789. Tor 0.2.0.17-alpha makes the tarball build cleanly again (whoops).
  23790. o Compile fixes:
  23791. - Make the tor-gencert man page get included correctly in the tarball.
  23792. Changes in version 0.2.0.16-alpha - 2008-01-17
  23793. Tor 0.2.0.16-alpha adds a fifth v3 directory authority run by Karsten
  23794. Loesing, and generally cleans up a lot of features and minor bugs.
  23795. o New directory authorities:
  23796. - Set up gabelmoo (run by Karsten Loesing) as the fifth v3 directory
  23797. authority.
  23798. o Major performance improvements:
  23799. - Switch our old ring buffer implementation for one more like that
  23800. used by free Unix kernels. The wasted space in a buffer with 1mb
  23801. of data will now be more like 8k than 1mb. The new implementation
  23802. also avoids realloc();realloc(); patterns that can contribute to
  23803. memory fragmentation.
  23804. o Minor features:
  23805. - Configuration files now accept C-style strings as values. This
  23806. helps encode characters not allowed in the current configuration
  23807. file format, such as newline or #. Addresses bug 557.
  23808. - Although we fixed bug 539 (where servers would send HTTP status 503
  23809. responses _and_ send a body too), there are still servers out
  23810. there that haven't upgraded. Therefore, make clients parse such
  23811. bodies when they receive them.
  23812. - When we're not serving v2 directory information, there is no reason
  23813. to actually keep any around. Remove the obsolete files and directory
  23814. on startup if they are very old and we aren't going to serve them.
  23815. o Minor performance improvements:
  23816. - Reference-count and share copies of address policy entries; only 5%
  23817. of them were actually distinct.
  23818. - Never walk through the list of logs if we know that no log is
  23819. interested in a given message.
  23820. o Minor bugfixes:
  23821. - When an authority has not signed a consensus, do not try to
  23822. download a nonexistent "certificate with key 00000000". Bugfix
  23823. on 0.2.0.x. Fixes bug 569.
  23824. - Fix a rare assert error when we're closing one of our threads:
  23825. use a mutex to protect the list of logs, so we never write to the
  23826. list as it's being freed. Bugfix on 0.1.2.x. Fixes the very rare
  23827. bug 575, which is kind of the revenge of bug 222.
  23828. - Patch from Karsten Loesing to complain less at both the client
  23829. and the relay when a relay used to have the HSDir flag but doesn't
  23830. anymore, and we try to upload a hidden service descriptor.
  23831. - Stop leaking one cert per TLS context. Fixes bug 582. Bugfix on
  23832. 0.2.0.15-alpha.
  23833. - Do not try to download missing certificates until we have tried
  23834. to check our fallback consensus. Fixes bug 583.
  23835. - Make bridges round reported GeoIP stats info up to the nearest
  23836. estimate, not down. Now we can distinguish between "0 people from
  23837. this country" and "1 person from this country".
  23838. - Avoid a spurious free on base64 failure. Bugfix on 0.1.2.
  23839. - Avoid possible segfault if key generation fails in
  23840. crypto_pk_hybrid_encrypt. Bugfix on 0.2.0.
  23841. - Avoid segfault in the case where a badly behaved v2 versioning
  23842. directory sends a signed networkstatus with missing client-versions.
  23843. Bugfix on 0.1.2.
  23844. - Avoid segfaults on certain complex invocations of
  23845. router_get_by_hexdigest(). Bugfix on 0.1.2.
  23846. - Correct bad index on array access in parse_http_time(). Bugfix
  23847. on 0.2.0.
  23848. - Fix possible bug in vote generation when server versions are present
  23849. but client versions are not.
  23850. - Fix rare bug on REDIRECTSTREAM control command when called with no
  23851. port set: it could erroneously report an error when none had
  23852. happened.
  23853. - Avoid bogus crash-prone, leak-prone tor_realloc when we're
  23854. compressing large objects and find ourselves with more than 4k
  23855. left over. Bugfix on 0.2.0.
  23856. - Fix a small memory leak when setting up a hidden service.
  23857. - Fix a few memory leaks that could in theory happen under bizarre
  23858. error conditions.
  23859. - Fix an assert if we post a general-purpose descriptor via the
  23860. control port but that descriptor isn't mentioned in our current
  23861. network consensus. Bug reported by Jon McLachlan; bugfix on
  23862. 0.2.0.9-alpha.
  23863. o Minor features (controller):
  23864. - Get NS events working again. Patch from tup.
  23865. - The GETCONF command now escapes and quotes configuration values
  23866. that don't otherwise fit into the torrc file.
  23867. - The SETCONF command now handles quoted values correctly.
  23868. o Minor features (directory authorities):
  23869. - New configuration options to override default maximum number of
  23870. servers allowed on a single IP address. This is important for
  23871. running a test network on a single host.
  23872. - Actually implement the -s option to tor-gencert.
  23873. - Add a manual page for tor-gencert.
  23874. o Minor features (bridges):
  23875. - Bridge authorities no longer serve bridge descriptors over
  23876. unencrypted connections.
  23877. o Minor features (other):
  23878. - Add hidden services and DNSPorts to the list of things that make
  23879. Tor accept that it has running ports. Change starting Tor with no
  23880. ports from a fatal error to a warning; we might change it back if
  23881. this turns out to confuse anybody. Fixes bug 579.
  23882. Changes in version 0.1.2.19 - 2008-01-17
  23883. Tor 0.1.2.19 fixes a huge memory leak on exit relays, makes the default
  23884. exit policy a little bit more conservative so it's safer to run an
  23885. exit relay on a home system, and fixes a variety of smaller issues.
  23886. o Security fixes:
  23887. - Exit policies now reject connections that are addressed to a
  23888. relay's public (external) IP address too, unless
  23889. ExitPolicyRejectPrivate is turned off. We do this because too
  23890. many relays are running nearby to services that trust them based
  23891. on network address.
  23892. o Major bugfixes:
  23893. - When the clock jumps forward a lot, do not allow the bandwidth
  23894. buckets to become negative. Fixes bug 544.
  23895. - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
  23896. on every successful resolve. Reported by Mike Perry.
  23897. - Purge old entries from the "rephist" database and the hidden
  23898. service descriptor database even when DirPort is zero.
  23899. - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
  23900. requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
  23901. crashing or mis-answering these requests.
  23902. - When we decide to send a 503 response to a request for servers, do
  23903. not then also send the server descriptors: this defeats the whole
  23904. purpose. Fixes bug 539.
  23905. o Minor bugfixes:
  23906. - Changing the ExitPolicyRejectPrivate setting should cause us to
  23907. rebuild our server descriptor.
  23908. - Fix handling of hex nicknames when answering controller requests for
  23909. networkstatus by name, or when deciding whether to warn about
  23910. unknown routers in a config option. (Patch from mwenge.)
  23911. - Fix a couple of hard-to-trigger autoconf problems that could result
  23912. in really weird results on platforms whose sys/types.h files define
  23913. nonstandard integer types.
  23914. - Don't try to create the datadir when running --verify-config or
  23915. --hash-password. Resolves bug 540.
  23916. - If we were having problems getting a particular descriptor from the
  23917. directory caches, and then we learned about a new descriptor for
  23918. that router, we weren't resetting our failure count. Reported
  23919. by lodger.
  23920. - Although we fixed bug 539 (where servers would send HTTP status 503
  23921. responses _and_ send a body too), there are still servers out there
  23922. that haven't upgraded. Therefore, make clients parse such bodies
  23923. when they receive them.
  23924. - Run correctly on systems where rlim_t is larger than unsigned long.
  23925. This includes some 64-bit systems.
  23926. - Run correctly on platforms (like some versions of OS X 10.5) where
  23927. the real limit for number of open files is OPEN_FILES, not rlim_max
  23928. from getrlimit(RLIMIT_NOFILES).
  23929. - Avoid a spurious free on base64 failure.
  23930. - Avoid segfaults on certain complex invocations of
  23931. router_get_by_hexdigest().
  23932. - Fix rare bug on REDIRECTSTREAM control command when called with no
  23933. port set: it could erroneously report an error when none had
  23934. happened.
  23935. Changes in version 0.2.0.15-alpha - 2007-12-25
  23936. Tor 0.2.0.14-alpha and 0.2.0.15-alpha fix a bunch of bugs with the
  23937. features added in 0.2.0.13-alpha.
  23938. o Major bugfixes:
  23939. - Fix several remotely triggerable asserts based on DirPort requests
  23940. for a v2 or v3 networkstatus object before we were prepared. This
  23941. was particularly bad for 0.2.0.13 and later bridge relays, who
  23942. would never have a v2 networkstatus and would thus always crash
  23943. when used. Bugfixes on 0.2.0.x.
  23944. - Estimate the v3 networkstatus size more accurately, rather than
  23945. estimating it at zero bytes and giving it artificially high priority
  23946. compared to other directory requests. Bugfix on 0.2.0.x.
  23947. o Minor bugfixes:
  23948. - Fix configure.in logic for cross-compilation.
  23949. - When we load a bridge descriptor from the cache, and it was
  23950. previously unreachable, mark it as retriable so we won't just
  23951. ignore it. Also, try fetching a new copy immediately. Bugfixes
  23952. on 0.2.0.13-alpha.
  23953. - The bridge GeoIP stats were counting other relays, for example
  23954. self-reachability and authority-reachability tests.
  23955. o Minor features:
  23956. - Support compilation to target iPhone; patch from cjacker huang.
  23957. To build for iPhone, pass the --enable-iphone option to configure.
  23958. Changes in version 0.2.0.14-alpha - 2007-12-23
  23959. o Major bugfixes:
  23960. - Fix a crash on startup if you install Tor 0.2.0.13-alpha fresh
  23961. without a datadirectory from a previous Tor install. Reported
  23962. by Zax.
  23963. - Fix a crash when we fetch a descriptor that turns out to be
  23964. unexpected (it used to be in our networkstatus when we started
  23965. fetching it, but it isn't in our current networkstatus), and we
  23966. aren't using bridges. Bugfix on 0.2.0.x.
  23967. - Fix a crash when accessing hidden services: it would work the first
  23968. time you use a given introduction point for your service, but
  23969. on subsequent requests we'd be using garbage memory. Fixed by
  23970. Karsten Loesing. Bugfix on 0.2.0.13-alpha.
  23971. - Fix a crash when we load a bridge descriptor from disk but we don't
  23972. currently have a Bridge line for it in our torrc. Bugfix on
  23973. 0.2.0.13-alpha.
  23974. o Major features:
  23975. - If bridge authorities set BridgePassword, they will serve a
  23976. snapshot of known bridge routerstatuses from their DirPort to
  23977. anybody who knows that password. Unset by default.
  23978. o Minor bugfixes:
  23979. - Make the unit tests build again.
  23980. - Make "GETINFO/desc-annotations/id/<OR digest>" actually work.
  23981. - Make PublishServerDescriptor default to 1, so the default doesn't
  23982. have to change as we invent new directory protocol versions.
  23983. - Fix test for rlim_t on OSX 10.3: sys/resource.h doesn't want to
  23984. be included unless sys/time.h is already included. Fixes
  23985. bug 553. Bugfix on 0.2.0.x.
  23986. - If we receive a general-purpose descriptor and then receive an
  23987. identical bridge-purpose descriptor soon after, don't discard
  23988. the next one as a duplicate.
  23989. o Minor features:
  23990. - If BridgeRelay is set to 1, then the default for
  23991. PublishServerDescriptor is now "bridge" rather than "v2,v3".
  23992. - If the user sets RelayBandwidthRate but doesn't set
  23993. RelayBandwidthBurst, then make them equal rather than erroring out.
  23994. Changes in version 0.2.0.13-alpha - 2007-12-21
  23995. Tor 0.2.0.13-alpha adds a fourth v3 directory authority run by Geoff
  23996. Goodell, fixes many more bugs, and adds a lot of infrastructure for
  23997. upcoming features.
  23998. o New directory authorities:
  23999. - Set up lefkada (run by Geoff Goodell) as the fourth v3 directory
  24000. authority.
  24001. o Major bugfixes:
  24002. - Only update guard status (usable / not usable) once we have
  24003. enough directory information. This was causing us to always pick
  24004. two new guards on startup (bugfix on 0.2.0.9-alpha), and it was
  24005. causing us to discard all our guards on startup if we hadn't been
  24006. running for a few weeks (bugfix on 0.1.2.x). Fixes bug 448.
  24007. - Purge old entries from the "rephist" database and the hidden
  24008. service descriptor databases even when DirPort is zero. Bugfix
  24009. on 0.1.2.x.
  24010. - We were ignoring our RelayBandwidthRate for the first 30 seconds
  24011. after opening a circuit -- even a relayed circuit. Bugfix on
  24012. 0.2.0.3-alpha.
  24013. - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
  24014. requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
  24015. crashing or mis-answering these types of requests.
  24016. - Relays were publishing their server descriptor to v1 and v2
  24017. directory authorities, but they didn't try publishing to v3-only
  24018. authorities. Fix this; and also stop publishing to v1 authorities.
  24019. Bugfix on 0.2.0.x.
  24020. - When we were reading router descriptors from cache, we were ignoring
  24021. the annotations -- so for example we were reading in bridge-purpose
  24022. descriptors as general-purpose descriptors. Bugfix on 0.2.0.8-alpha.
  24023. - When we decided to send a 503 response to a request for servers, we
  24024. were then also sending the server descriptors: this defeats the
  24025. whole purpose. Fixes bug 539; bugfix on 0.1.2.x.
  24026. o Major features:
  24027. - Bridge relays now behave like clients with respect to time
  24028. intervals for downloading new consensus documents -- otherwise they
  24029. stand out. Bridge users now wait until the end of the interval,
  24030. so their bridge relay will be sure to have a new consensus document.
  24031. - Three new config options (AlternateDirAuthority,
  24032. AlternateBridgeAuthority, and AlternateHSAuthority) that let the
  24033. user selectively replace the default directory authorities by type,
  24034. rather than the all-or-nothing replacement that DirServer offers.
  24035. - Tor can now be configured to read a GeoIP file from disk in one
  24036. of two formats. This can be used by controllers to map IP addresses
  24037. to countries. Eventually, it may support exit-by-country.
  24038. - When possible, bridge relays remember which countries users
  24039. are coming from, and report aggregate information in their
  24040. extra-info documents, so that the bridge authorities can learn
  24041. where Tor is blocked.
  24042. - Bridge directory authorities now do reachability testing on the
  24043. bridges they know. They provide router status summaries to the
  24044. controller via "getinfo ns/purpose/bridge", and also dump summaries
  24045. to a file periodically.
  24046. - Stop fetching directory info so aggressively if your DirPort is
  24047. on but your ORPort is off; stop fetching v2 dir info entirely.
  24048. You can override these choices with the new FetchDirInfoEarly
  24049. config option.
  24050. o Minor bugfixes:
  24051. - The fix in 0.2.0.12-alpha cleared the "hsdir" flag in v3 network
  24052. consensus documents when there are too many relays at a single
  24053. IP address. Now clear it in v2 network status documents too, and
  24054. also clear it in routerinfo_t when the relay is no longer listed
  24055. in the relevant networkstatus document.
  24056. - Don't crash if we get an unexpected value for the
  24057. PublishServerDescriptor config option. Reported by Matt Edman;
  24058. bugfix on 0.2.0.9-alpha.
  24059. - Our new v2 hidden service descriptor format allows descriptors
  24060. that have no introduction points. But Tor crashed when we tried
  24061. to build a descriptor with no intro points (and it would have
  24062. crashed if we had tried to parse one). Bugfix on 0.2.0.x; patch
  24063. by Karsten Loesing.
  24064. - Fix building with dmalloc 5.5.2 with glibc.
  24065. - Reject uploaded descriptors and extrainfo documents if they're
  24066. huge. Otherwise we'll cache them all over the network and it'll
  24067. clog everything up. Reported by Aljosha Judmayer.
  24068. - Check for presence of s6_addr16 and s6_addr32 fields in in6_addr
  24069. via autoconf. Should fix compile on solaris. Bugfix on 0.2.0.x.
  24070. - When the DANGEROUS_VERSION controller status event told us we're
  24071. running an obsolete version, it used the string "OLD" to describe
  24072. it. Yet the "getinfo" interface used the string "OBSOLETE". Now use
  24073. "OBSOLETE" in both cases. Bugfix on 0.1.2.x.
  24074. - If we can't expand our list of entry guards (e.g. because we're
  24075. using bridges or we have StrictEntryNodes set), don't mark relays
  24076. down when they fail a directory request. Otherwise we're too quick
  24077. to mark all our entry points down. Bugfix on 0.1.2.x.
  24078. - Fix handling of hex nicknames when answering controller requests for
  24079. networkstatus by name, or when deciding whether to warn about unknown
  24080. routers in a config option. Bugfix on 0.1.2.x. (Patch from mwenge.)
  24081. - Fix a couple of hard-to-trigger autoconf problems that could result
  24082. in really weird results on platforms whose sys/types.h files define
  24083. nonstandard integer types. Bugfix on 0.1.2.x.
  24084. - Fix compilation with --disable-threads set. Bugfix on 0.2.0.x.
  24085. - Don't crash on name lookup when we have no current consensus. Fixes
  24086. bug 538; bugfix on 0.2.0.x.
  24087. - Only Tors that want to mirror the v2 directory info should
  24088. create the "cached-status" directory in their datadir. (All Tors
  24089. used to create it.) Bugfix on 0.2.0.9-alpha.
  24090. - Directory authorities should only automatically download Extra Info
  24091. documents if they're v1, v2, or v3 authorities. Bugfix on 0.1.2.x.
  24092. o Minor features:
  24093. - On the USR1 signal, when dmalloc is in use, log the top 10 memory
  24094. consumers. (We already do this on HUP.)
  24095. - Authorities and caches fetch the v2 networkstatus documents
  24096. less often, now that v3 is encouraged.
  24097. - Add a new config option BridgeRelay that specifies you want to
  24098. be a bridge relay. Right now the only difference is that it makes
  24099. you answer begin_dir requests, and it makes you cache dir info,
  24100. even if your DirPort isn't on.
  24101. - Add "GETINFO/desc-annotations/id/<OR digest>" so controllers can
  24102. ask about source, timestamp of arrival, purpose, etc. We need
  24103. something like this to help Vidalia not do GeoIP lookups on bridge
  24104. addresses.
  24105. - Allow multiple HashedControlPassword config lines, to support
  24106. multiple controller passwords.
  24107. - Authorities now decide whether they're authoritative for a given
  24108. router based on the router's purpose.
  24109. - New config options AuthDirBadDir and AuthDirListBadDirs for
  24110. authorities to mark certain relays as "bad directories" in the
  24111. networkstatus documents. Also supports the "!baddir" directive in
  24112. the approved-routers file.
  24113. Changes in version 0.2.0.12-alpha - 2007-11-16
  24114. This twelfth development snapshot fixes some more build problems as
  24115. well as a few minor bugs.
  24116. o Compile fixes:
  24117. - Make it build on OpenBSD again. Patch from tup.
  24118. - Substitute BINDIR and LOCALSTATEDIR in scripts. Fixes
  24119. package-building for Red Hat, OS X, etc.
  24120. o Minor bugfixes (on 0.1.2.x):
  24121. - Changing the ExitPolicyRejectPrivate setting should cause us to
  24122. rebuild our server descriptor.
  24123. o Minor bugfixes (on 0.2.0.x):
  24124. - When we're lacking a consensus, don't try to perform rendezvous
  24125. operations. Reported by Karsten Loesing.
  24126. - Fix a small memory leak whenever we decide against using a
  24127. newly picked entry guard. Reported by Mike Perry.
  24128. - When authorities detected more than two relays running on the same
  24129. IP address, they were clearing all the status flags but forgetting
  24130. to clear the "hsdir" flag. So clients were being told that a
  24131. given relay was the right choice for a v2 hsdir lookup, yet they
  24132. never had its descriptor because it was marked as 'not running'
  24133. in the consensus.
  24134. - If we're trying to fetch a bridge descriptor and there's no way
  24135. the bridge authority could help us (for example, we don't know
  24136. a digest, or there is no bridge authority), don't be so eager to
  24137. fall back to asking the bridge authority.
  24138. - If we're using bridges or have strictentrynodes set, and our
  24139. chosen exit is in the same family as all our bridges/entry guards,
  24140. then be flexible about families.
  24141. o Minor features:
  24142. - When we negotiate a v2 link-layer connection (not yet implemented),
  24143. accept RELAY_EARLY cells and turn them into RELAY cells if we've
  24144. negotiated a v1 connection for their next step. Initial code for
  24145. proposal 110.
  24146. Changes in version 0.2.0.11-alpha - 2007-11-12
  24147. This eleventh development snapshot fixes some build problems with
  24148. the previous snapshot. It also includes a more secure-by-default exit
  24149. policy for relays, fixes an enormous memory leak for exit relays, and
  24150. fixes another bug where servers were falling out of the directory list.
  24151. o Security fixes:
  24152. - Exit policies now reject connections that are addressed to a
  24153. relay's public (external) IP address too, unless
  24154. ExitPolicyRejectPrivate is turned off. We do this because too
  24155. many relays are running nearby to services that trust them based
  24156. on network address. Bugfix on 0.1.2.x.
  24157. o Major bugfixes:
  24158. - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
  24159. on every successful resolve. Reported by Mike Perry; bugfix
  24160. on 0.1.2.x.
  24161. - On authorities, never downgrade to old router descriptors simply
  24162. because they're listed in the consensus. This created a catch-22
  24163. where we wouldn't list a new descriptor because there was an
  24164. old one in the consensus, and we couldn't get the new one in the
  24165. consensus because we wouldn't list it. Possible fix for bug 548.
  24166. Also, this might cause bug 543 to appear on authorities; if so,
  24167. we'll need a band-aid for that. Bugfix on 0.2.0.9-alpha.
  24168. o Packaging fixes on 0.2.0.10-alpha:
  24169. - We were including instructions about what to do with the
  24170. src/config/fallback-consensus file, but we weren't actually
  24171. including it in the tarball. Disable all of that for now.
  24172. o Minor features:
  24173. - Allow people to say PreferTunnelledDirConns rather than
  24174. PreferTunneledDirConns, for those alternate-spellers out there.
  24175. o Minor bugfixes:
  24176. - Don't reevaluate all the information from our consensus document
  24177. just because we've downloaded a v2 networkstatus that we intend
  24178. to cache. Fixes bug 545; bugfix on 0.2.0.x.
  24179. Changes in version 0.2.0.10-alpha - 2007-11-10
  24180. This tenth development snapshot adds a third v3 directory authority
  24181. run by Mike Perry, adds most of Karsten Loesing's new hidden service
  24182. descriptor format, fixes a bad crash bug and new bridge bugs introduced
  24183. in 0.2.0.9-alpha, fixes many bugs with the v3 directory implementation,
  24184. fixes some minor memory leaks in previous 0.2.0.x snapshots, and
  24185. addresses many more minor issues.
  24186. o New directory authorities:
  24187. - Set up ides (run by Mike Perry) as the third v3 directory authority.
  24188. o Major features:
  24189. - Allow tunnelled directory connections to ask for an encrypted
  24190. "begin_dir" connection or an anonymized "uses a full Tor circuit"
  24191. connection independently. Now we can make anonymized begin_dir
  24192. connections for (e.g.) more secure hidden service posting and
  24193. fetching.
  24194. - More progress on proposal 114: code from Karsten Loesing to
  24195. implement new hidden service descriptor format.
  24196. - Raise the default BandwidthRate/BandwidthBurst to 5MB/10MB, to
  24197. accommodate the growing number of servers that use the default
  24198. and are reaching it.
  24199. - Directory authorities use a new formula for selecting which nodes
  24200. to advertise as Guards: they must be in the top 7/8 in terms of
  24201. how long we have known about them, and above the median of those
  24202. nodes in terms of weighted fractional uptime.
  24203. - Make "not enough dir info yet" warnings describe *why* Tor feels
  24204. it doesn't have enough directory info yet.
  24205. o Major bugfixes:
  24206. - Stop servers from crashing if they set a Family option (or
  24207. maybe in other situations too). Bugfix on 0.2.0.9-alpha; reported
  24208. by Fabian Keil.
  24209. - Make bridge users work again -- the move to v3 directories in
  24210. 0.2.0.9-alpha had introduced a number of bugs that made bridges
  24211. no longer work for clients.
  24212. - When the clock jumps forward a lot, do not allow the bandwidth
  24213. buckets to become negative. Bugfix on 0.1.2.x; fixes bug 544.
  24214. o Major bugfixes (v3 dir, bugfixes on 0.2.0.9-alpha):
  24215. - When the consensus lists a router descriptor that we previously were
  24216. mirroring, but that we considered non-canonical, reload the
  24217. descriptor as canonical. This fixes bug 543 where Tor servers
  24218. would start complaining after a few days that they don't have
  24219. enough directory information to build a circuit.
  24220. - Consider replacing the current consensus when certificates arrive
  24221. that make the pending consensus valid. Previously, we were only
  24222. considering replacement when the new certs _didn't_ help.
  24223. - Fix an assert error on startup if we didn't already have the
  24224. consensus and certs cached in our datadirectory: we were caching
  24225. the consensus in consensus_waiting_for_certs but then free'ing it
  24226. right after.
  24227. - Avoid sending a request for "keys/fp" (for which we'll get a 400 Bad
  24228. Request) if we need more v3 certs but we've already got pending
  24229. requests for all of them.
  24230. - Correctly back off from failing certificate downloads. Fixes
  24231. bug 546.
  24232. - Authorities don't vote on the Running flag if they have been running
  24233. for less than 30 minutes themselves. Fixes bug 547, where a newly
  24234. started authority would vote that everyone was down.
  24235. o New requirements:
  24236. - Drop support for OpenSSL version 0.9.6. Just about nobody was using
  24237. it, it had no AES, and it hasn't seen any security patches since
  24238. 2004.
  24239. o Minor features:
  24240. - Clients now hold circuitless TLS connections open for 1.5 times
  24241. MaxCircuitDirtiness (15 minutes), since it is likely that they'll
  24242. rebuild a new circuit over them within that timeframe. Previously,
  24243. they held them open only for KeepalivePeriod (5 minutes).
  24244. - Use "If-Modified-Since" to avoid retrieving consensus
  24245. networkstatuses that we already have.
  24246. - When we have no consensus, check FallbackNetworkstatusFile (defaults
  24247. to $PREFIX/share/tor/fallback-consensus) for a consensus. This way
  24248. we start knowing some directory caches.
  24249. - When we receive a consensus from the future, warn about skew.
  24250. - Improve skew reporting: try to give the user a better log message
  24251. about how skewed they are, and how much this matters.
  24252. - When we have a certificate for an authority, believe that
  24253. certificate's claims about the authority's IP address.
  24254. - New --quiet command-line option to suppress the default console log.
  24255. Good in combination with --hash-password.
  24256. - Authorities send back an X-Descriptor-Not-New header in response to
  24257. an accepted-but-discarded descriptor upload. Partially implements
  24258. fix for bug 535.
  24259. - Make the log message for "tls error. breaking." more useful.
  24260. - Better log messages about certificate downloads, to attempt to
  24261. track down the second incarnation of bug 546.
  24262. o Minor features (bridges):
  24263. - If bridge users set UpdateBridgesFromAuthority, but the digest
  24264. they ask for is a 404 from the bridge authority, they now fall
  24265. back to trying the bridge directly.
  24266. - Bridges now use begin_dir to publish their server descriptor to
  24267. the bridge authority, even when they haven't set TunnelDirConns.
  24268. o Minor features (controller):
  24269. - When reporting clock skew, and we know that the clock is _at least
  24270. as skewed_ as some value, but we don't know the actual value,
  24271. report the value as a "minimum skew."
  24272. o Utilities:
  24273. - Update linux-tor-prio.sh script to allow QoS based on the uid of
  24274. the Tor process. Patch from Marco Bonetti with tweaks from Mike
  24275. Perry.
  24276. o Minor bugfixes:
  24277. - Refuse to start if both ORPort and UseBridges are set. Bugfix
  24278. on 0.2.0.x, suggested by Matt Edman.
  24279. - Don't stop fetching descriptors when FetchUselessDescriptors is
  24280. set, even if we stop asking for circuits. Bugfix on 0.1.2.x;
  24281. reported by tup and ioerror.
  24282. - Better log message on vote from unknown authority.
  24283. - Don't log "Launching 0 request for 0 router" message.
  24284. o Minor bugfixes (memory leaks):
  24285. - Stop leaking memory every time we parse a v3 certificate. Bugfix
  24286. on 0.2.0.1-alpha.
  24287. - Stop leaking memory every time we load a v3 certificate. Bugfix
  24288. on 0.2.0.1-alpha. Fixes bug 536.
  24289. - Stop leaking a cached networkstatus on exit. Bugfix on
  24290. 0.2.0.3-alpha.
  24291. - Stop leaking voter information every time we free a consensus.
  24292. Bugfix on 0.2.0.3-alpha.
  24293. - Stop leaking signed data every time we check a voter signature.
  24294. Bugfix on 0.2.0.3-alpha.
  24295. - Stop leaking a signature every time we fail to parse a consensus or
  24296. a vote. Bugfix on 0.2.0.3-alpha.
  24297. - Stop leaking v2_download_status_map on shutdown. Bugfix on
  24298. 0.2.0.9-alpha.
  24299. - Stop leaking conn->nickname every time we make a connection to a
  24300. Tor relay without knowing its expected identity digest (e.g. when
  24301. using bridges). Bugfix on 0.2.0.3-alpha.
  24302. - Minor bugfixes (portability):
  24303. - Run correctly on platforms where rlim_t is larger than unsigned
  24304. long, and/or where the real limit for number of open files is
  24305. OPEN_FILES, not rlim_max from getrlimit(RLIMIT_NOFILES). In
  24306. particular, these may be needed for OS X 10.5.
  24307. Changes in version 0.1.2.18 - 2007-10-28
  24308. Tor 0.1.2.18 fixes many problems including crash bugs, problems with
  24309. hidden service introduction that were causing huge delays, and a big
  24310. bug that was causing some servers to disappear from the network status
  24311. lists for a few hours each day.
  24312. o Major bugfixes (crashes):
  24313. - If a connection is shut down abruptly because of something that
  24314. happened inside connection_flushed_some(), do not call
  24315. connection_finished_flushing(). Should fix bug 451:
  24316. "connection_stop_writing: Assertion conn->write_event failed"
  24317. Bugfix on 0.1.2.7-alpha.
  24318. - Fix possible segfaults in functions called from
  24319. rend_process_relay_cell().
  24320. o Major bugfixes (hidden services):
  24321. - Hidden services were choosing introduction points uniquely by
  24322. hexdigest, but when constructing the hidden service descriptor
  24323. they merely wrote the (potentially ambiguous) nickname.
  24324. - Clients now use the v2 intro format for hidden service
  24325. connections: they specify their chosen rendezvous point by identity
  24326. digest rather than by (potentially ambiguous) nickname. These
  24327. changes could speed up hidden service connections dramatically.
  24328. o Major bugfixes (other):
  24329. - Stop publishing a new server descriptor just because we get a
  24330. HUP signal. This led (in a roundabout way) to some servers getting
  24331. dropped from the networkstatus lists for a few hours each day.
  24332. - When looking for a circuit to cannibalize, consider family as well
  24333. as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
  24334. circuit cannibalization).
  24335. - When a router wasn't listed in a new networkstatus, we were leaving
  24336. the flags for that router alone -- meaning it remained Named,
  24337. Running, etc -- even though absence from the networkstatus means
  24338. that it shouldn't be considered to exist at all anymore. Now we
  24339. clear all the flags for routers that fall out of the networkstatus
  24340. consensus. Fixes bug 529.
  24341. o Minor bugfixes:
  24342. - Don't try to access (or alter) the state file when running
  24343. --list-fingerprint or --verify-config or --hash-password. Resolves
  24344. bug 499.
  24345. - When generating information telling us how to extend to a given
  24346. router, do not try to include the nickname if it is
  24347. absent. Resolves bug 467.
  24348. - Fix a user-triggerable segfault in expand_filename(). (There isn't
  24349. a way to trigger this remotely.)
  24350. - When sending a status event to the controller telling it that an
  24351. OR address is reachable, set the port correctly. (Previously we
  24352. were reporting the dir port.)
  24353. - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
  24354. command. Bugfix on 0.1.2.17.
  24355. - When loading bandwidth history, do not believe any information in
  24356. the future. Fixes bug 434.
  24357. - When loading entry guard information, do not believe any information
  24358. in the future.
  24359. - When we have our clock set far in the future and generate an
  24360. onion key, then re-set our clock to be correct, we should not stop
  24361. the onion key from getting rotated.
  24362. - On some platforms, accept() can return a broken address. Detect
  24363. this more quietly, and deal accordingly. Fixes bug 483.
  24364. - It's not actually an error to find a non-pending entry in the DNS
  24365. cache when canceling a pending resolve. Don't log unless stuff
  24366. is fishy. Resolves bug 463.
  24367. - Don't reset trusted dir server list when we set a configuration
  24368. option. Patch from Robert Hogan.
  24369. - Don't try to create the datadir when running --verify-config or
  24370. --hash-password. Resolves bug 540.
  24371. Changes in version 0.2.0.9-alpha - 2007-10-24
  24372. This ninth development snapshot switches clients to the new v3 directory
  24373. system; allows servers to be listed in the network status even when they
  24374. have the same nickname as a registered server; and fixes many other
  24375. bugs including a big one that was causing some servers to disappear
  24376. from the network status lists for a few hours each day.
  24377. o Major features (directory system):
  24378. - Clients now download v3 consensus networkstatus documents instead
  24379. of v2 networkstatus documents. Clients and caches now base their
  24380. opinions about routers on these consensus documents. Clients only
  24381. download router descriptors listed in the consensus.
  24382. - Authorities now list servers who have the same nickname as
  24383. a different named server, but list them with a new flag,
  24384. "Unnamed". Now we can list servers that happen to pick the same
  24385. nickname as a server that registered two years ago and then
  24386. disappeared. Partially implements proposal 122.
  24387. - If the consensus lists a router as "Unnamed", the name is assigned
  24388. to a different router: do not identify the router by that name.
  24389. Partially implements proposal 122.
  24390. - Authorities can now come to a consensus on which method to use to
  24391. compute the consensus. This gives us forward compatibility.
  24392. o Major bugfixes:
  24393. - Stop publishing a new server descriptor just because we HUP or
  24394. when we find our DirPort to be reachable but won't actually publish
  24395. it. New descriptors without any real changes are dropped by the
  24396. authorities, and can screw up our "publish every 18 hours" schedule.
  24397. Bugfix on 0.1.2.x.
  24398. - When a router wasn't listed in a new networkstatus, we were leaving
  24399. the flags for that router alone -- meaning it remained Named,
  24400. Running, etc -- even though absence from the networkstatus means
  24401. that it shouldn't be considered to exist at all anymore. Now we
  24402. clear all the flags for routers that fall out of the networkstatus
  24403. consensus. Fixes bug 529; bugfix on 0.1.2.x.
  24404. - Fix awful behavior in DownloadExtraInfo option where we'd fetch
  24405. extrainfo documents and then discard them immediately for not
  24406. matching the latest router. Bugfix on 0.2.0.1-alpha.
  24407. o Minor features (v3 directory protocol):
  24408. - Allow tor-gencert to generate a new certificate without replacing
  24409. the signing key.
  24410. - Allow certificates to include an address.
  24411. - When we change our directory-cache settings, reschedule all voting
  24412. and download operations.
  24413. - Reattempt certificate downloads immediately on failure, as long as
  24414. we haven't failed a threshold number of times yet.
  24415. - Delay retrying consensus downloads while we're downloading
  24416. certificates to verify the one we just got. Also, count getting a
  24417. consensus that we already have (or one that isn't valid) as a failure,
  24418. and count failing to get the certificates after 20 minutes as a
  24419. failure.
  24420. - Build circuits and download descriptors even if our consensus is a
  24421. little expired. (This feature will go away once authorities are
  24422. more reliable.)
  24423. o Minor features (router descriptor cache):
  24424. - If we find a cached-routers file that's been sitting around for more
  24425. than 28 days unmodified, then most likely it's a leftover from
  24426. when we upgraded to 0.2.0.8-alpha. Remove it. It has no good
  24427. routers anyway.
  24428. - When we (as a cache) download a descriptor because it was listed
  24429. in a consensus, remember when the consensus was supposed to expire,
  24430. and don't expire the descriptor until then.
  24431. o Minor features (performance):
  24432. - Call routerlist_remove_old_routers() much less often. This should
  24433. speed startup, especially on directory caches.
  24434. - Don't try to launch new descriptor downloads quite so often when we
  24435. already have enough directory information to build circuits.
  24436. - Base64 decoding was actually showing up on our profile when parsing
  24437. the initial descriptor file; switch to an in-process all-at-once
  24438. implementation that's about 3.5x times faster than calling out to
  24439. OpenSSL.
  24440. o Minor features (compilation):
  24441. - Detect non-ASCII platforms (if any still exist) and refuse to
  24442. build there: some of our code assumes that 'A' is 65 and so on.
  24443. o Minor bugfixes (v3 directory authorities, bugfixes on 0.2.0.x):
  24444. - Make the "next period" votes into "current period" votes immediately
  24445. after publishing the consensus; avoid a heisenbug that made them
  24446. stick around indefinitely.
  24447. - When we discard a vote as a duplicate, do not report this as
  24448. an error.
  24449. - Treat missing v3 keys or certificates as an error when running as a
  24450. v3 directory authority.
  24451. - When we're configured to be a v3 authority, but we're only listed
  24452. as a non-v3 authority in our DirServer line for ourself, correct
  24453. the listing.
  24454. - If an authority doesn't have a qualified hostname, just put
  24455. its address in the vote. This fixes the problem where we referred to
  24456. "moria on moria:9031."
  24457. - Distinguish between detached signatures for the wrong period, and
  24458. detached signatures for a divergent vote.
  24459. - Fix a small memory leak when computing a consensus.
  24460. - When there's no consensus, we were forming a vote every 30
  24461. minutes, but writing the "valid-after" line in our vote based
  24462. on our configured V3AuthVotingInterval: so unless the intervals
  24463. matched up, we immediately rejected our own vote because it didn't
  24464. start at the voting interval that caused us to construct a vote.
  24465. o Minor bugfixes (v3 directory protocol, bugfixes on 0.2.0.x):
  24466. - Delete unverified-consensus when the real consensus is set.
  24467. - Consider retrying a consensus networkstatus fetch immediately
  24468. after one fails: don't wait 60 seconds to notice.
  24469. - When fetching a consensus as a cache, wait until a newer consensus
  24470. should exist before trying to replace the current one.
  24471. - Use a more forgiving schedule for retrying failed consensus
  24472. downloads than for other types.
  24473. o Minor bugfixes (other directory issues):
  24474. - Correct the implementation of "download votes by digest." Bugfix on
  24475. 0.2.0.8-alpha.
  24476. - Authorities no longer send back "400 you're unreachable please fix
  24477. it" errors to Tor servers that aren't online all the time. We're
  24478. supposed to tolerate these servers now. Bugfix on 0.1.2.x.
  24479. o Minor bugfixes (controller):
  24480. - Don't reset trusted dir server list when we set a configuration
  24481. option. Patch from Robert Hogan; bugfix on 0.1.2.x.
  24482. - Respond to INT and TERM SIGNAL commands before we execute the
  24483. signal, in case the signal shuts us down. We had a patch in
  24484. 0.1.2.1-alpha that tried to do this by queueing the response on
  24485. the connection's buffer before shutting down, but that really
  24486. isn't the same thing at all. Bug located by Matt Edman.
  24487. o Minor bugfixes (misc):
  24488. - Correctly check for bad options to the "PublishServerDescriptor"
  24489. config option. Bugfix on 0.2.0.1-alpha; reported by Matt Edman.
  24490. - Stop leaking memory on failing case of base32_decode, and make
  24491. it accept upper-case letters. Bugfixes on 0.2.0.7-alpha.
  24492. - Don't try to download extrainfo documents when we're trying to
  24493. fetch enough directory info to build a circuit: having enough
  24494. info should get priority. Bugfix on 0.2.0.x.
  24495. - Don't complain that "your server has not managed to confirm that its
  24496. ports are reachable" if we haven't been able to build any circuits
  24497. yet. Bug found by spending four hours without a v3 consensus. Bugfix
  24498. on 0.1.2.x.
  24499. - Detect the reason for failing to mmap a descriptor file we just
  24500. wrote, and give a more useful log message. Fixes bug 533. Bugfix
  24501. on 0.1.2.x.
  24502. o Code simplifications and refactoring:
  24503. - Remove support for the old bw_accounting file: we've been storing
  24504. bandwidth accounting information in the state file since
  24505. 0.1.2.5-alpha. This may result in bandwidth accounting errors
  24506. if you try to upgrade from 0.1.1.x or earlier, or if you try to
  24507. downgrade to 0.1.1.x or earlier.
  24508. - New convenience code to locate a file within the DataDirectory.
  24509. - Move non-authority functionality out of dirvote.c.
  24510. - Refactor the arguments for router_pick_{directory_|trusteddir}server
  24511. so that they all take the same named flags.
  24512. o Utilities
  24513. - Include the "tor-ctrl.sh" bash script by Stefan Behte to provide
  24514. Unix users an easy way to script their Tor process (e.g. by
  24515. adjusting bandwidth based on the time of the day).
  24516. Changes in version 0.2.0.8-alpha - 2007-10-12
  24517. This eighth development snapshot fixes a crash bug that's been bothering
  24518. us since February 2007, lets bridge authorities store a list of bridge
  24519. descriptors they've seen, gets v3 directory voting closer to working,
  24520. starts caching v3 directory consensus documents on directory mirrors,
  24521. and fixes a variety of smaller issues including some minor memory leaks.
  24522. o Major features (router descriptor cache):
  24523. - Store routers in a file called cached-descriptors instead of in
  24524. cached-routers. Initialize cached-descriptors from cached-routers
  24525. if the old format is around. The new format allows us to store
  24526. annotations along with descriptors.
  24527. - Use annotations to record the time we received each descriptor, its
  24528. source, and its purpose.
  24529. - Disable the SETROUTERPURPOSE controller command: it is now
  24530. obsolete.
  24531. - Controllers should now specify cache=no or cache=yes when using
  24532. the +POSTDESCRIPTOR command.
  24533. - Bridge authorities now write bridge descriptors to disk, meaning
  24534. we can export them to other programs and begin distributing them
  24535. to blocked users.
  24536. o Major features (directory authorities):
  24537. - When a v3 authority is missing votes or signatures, it now tries
  24538. to fetch them.
  24539. - Directory authorities track weighted fractional uptime as well as
  24540. weighted mean-time-between failures. WFU is suitable for deciding
  24541. whether a node is "usually up", while MTBF is suitable for deciding
  24542. whether a node is "likely to stay up." We need both, because
  24543. "usually up" is a good requirement for guards, while "likely to
  24544. stay up" is a good requirement for long-lived connections.
  24545. o Major features (v3 directory system):
  24546. - Caches now download v3 network status documents as needed,
  24547. and download the descriptors listed in them.
  24548. - All hosts now attempt to download and keep fresh v3 authority
  24549. certificates, and re-attempt after failures.
  24550. - More internal-consistency checks for vote parsing.
  24551. o Major bugfixes (crashes):
  24552. - If a connection is shut down abruptly because of something that
  24553. happened inside connection_flushed_some(), do not call
  24554. connection_finished_flushing(). Should fix bug 451. Bugfix on
  24555. 0.1.2.7-alpha.
  24556. o Major bugfixes (performance):
  24557. - Fix really bad O(n^2) performance when parsing a long list of
  24558. routers: Instead of searching the entire list for an "extra-info "
  24559. string which usually wasn't there, once for every routerinfo
  24560. we read, just scan lines forward until we find one we like.
  24561. Bugfix on 0.2.0.1.
  24562. - When we add data to a write buffer in response to the data on that
  24563. write buffer getting low because of a flush, do not consider the
  24564. newly added data as a candidate for immediate flushing, but rather
  24565. make it wait until the next round of writing. Otherwise, we flush
  24566. and refill recursively, and a single greedy TLS connection can
  24567. eat all of our bandwidth. Bugfix on 0.1.2.7-alpha.
  24568. o Minor features (v3 authority system):
  24569. - Add more ways for tools to download the votes that lead to the
  24570. current consensus.
  24571. - Send a 503 when low on bandwidth and a vote, consensus, or
  24572. certificate is requested.
  24573. - If-modified-since is now implemented properly for all kinds of
  24574. certificate requests.
  24575. o Minor bugfixes (network statuses):
  24576. - Tweak the implementation of proposal 109 slightly: allow at most
  24577. two Tor servers on the same IP address, except if it's the location
  24578. of a directory authority, in which case allow five. Bugfix on
  24579. 0.2.0.3-alpha.
  24580. o Minor bugfixes (controller):
  24581. - When sending a status event to the controller telling it that an
  24582. OR address is reachable, set the port correctly. (Previously we
  24583. were reporting the dir port.) Bugfix on 0.1.2.x.
  24584. o Minor bugfixes (v3 directory system):
  24585. - Fix logic to look up a cert by its signing key digest. Bugfix on
  24586. 0.2.0.7-alpha.
  24587. - Only change the reply to a vote to "OK" if it's not already
  24588. set. This gets rid of annoying "400 OK" log messages, which may
  24589. have been masking some deeper issue. Bugfix on 0.2.0.7-alpha.
  24590. - When we get a valid consensus, recompute the voting schedule.
  24591. - Base the valid-after time of a vote on the consensus voting
  24592. schedule, not on our preferred schedule.
  24593. - Make the return values and messages from signature uploads and
  24594. downloads more sensible.
  24595. - Fix a memory leak when serving votes and consensus documents, and
  24596. another when serving certificates.
  24597. o Minor bugfixes (performance):
  24598. - Use a slightly simpler string hashing algorithm (copying Python's
  24599. instead of Java's) and optimize our digest hashing algorithm to take
  24600. advantage of 64-bit platforms and to remove some possibly-costly
  24601. voodoo.
  24602. - Fix a minor memory leak whenever we parse guards from our state
  24603. file. Bugfix on 0.2.0.7-alpha.
  24604. - Fix a minor memory leak whenever we write out a file. Bugfix on
  24605. 0.2.0.7-alpha.
  24606. - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
  24607. command. Bugfix on 0.2.0.5-alpha.
  24608. o Minor bugfixes (portability):
  24609. - On some platforms, accept() can return a broken address. Detect
  24610. this more quietly, and deal accordingly. Fixes bug 483.
  24611. - Stop calling tor_strlower() on uninitialized memory in some cases.
  24612. Bugfix in 0.2.0.7-alpha.
  24613. o Minor bugfixes (usability):
  24614. - Treat some 403 responses from directory servers as INFO rather than
  24615. WARN-severity events.
  24616. - It's not actually an error to find a non-pending entry in the DNS
  24617. cache when canceling a pending resolve. Don't log unless stuff is
  24618. fishy. Resolves bug 463.
  24619. o Minor bugfixes (anonymity):
  24620. - Never report that we've used more bandwidth than we're willing to
  24621. relay: it leaks how much non-relay traffic we're using. Resolves
  24622. bug 516.
  24623. - When looking for a circuit to cannibalize, consider family as well
  24624. as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
  24625. circuit cannibalization).
  24626. o Code simplifications and refactoring:
  24627. - Make a bunch of functions static. Remove some dead code.
  24628. - Pull out about a third of the really big routerlist.c; put it in a
  24629. new module, networkstatus.c.
  24630. - Merge the extra fields in local_routerstatus_t back into
  24631. routerstatus_t: we used to need one routerstatus_t for each
  24632. authority's opinion, plus a local_routerstatus_t for the locally
  24633. computed consensus opinion. To save space, we put the locally
  24634. modified fields into local_routerstatus_t, and only the common
  24635. stuff into routerstatus_t. But once v3 directories are in use,
  24636. clients and caches will no longer need to hold authority opinions;
  24637. thus, the rationale for keeping the types separate is now gone.
  24638. - Make the code used to reschedule and reattempt downloads more
  24639. uniform.
  24640. - Turn all 'Are we a directory server/mirror?' logic into a call to
  24641. dirserver_mode().
  24642. - Remove the code to generate the oldest (v1) directory format.
  24643. The code has been disabled since 0.2.0.5-alpha.
  24644. Changes in version 0.2.0.7-alpha - 2007-09-21
  24645. This seventh development snapshot makes bridges work again, makes bridge
  24646. authorities work for the first time, fixes two huge performance flaws
  24647. in hidden services, and fixes a variety of minor issues.
  24648. o New directory authorities:
  24649. - Set up moria1 and tor26 as the first v3 directory authorities. See
  24650. doc/spec/dir-spec.txt for details on the new directory design.
  24651. o Major bugfixes (crashes):
  24652. - Fix possible segfaults in functions called from
  24653. rend_process_relay_cell(). Bugfix on 0.1.2.x.
  24654. o Major bugfixes (bridges):
  24655. - Fix a bug that made servers send a "404 Not found" in response to
  24656. attempts to fetch their server descriptor. This caused Tor servers
  24657. to take many minutes to establish reachability for their DirPort,
  24658. and it totally crippled bridges. Bugfix on 0.2.0.5-alpha.
  24659. - Make "UpdateBridgesFromAuthority" torrc option work: when bridge
  24660. users configure that and specify a bridge with an identity
  24661. fingerprint, now they will lookup the bridge descriptor at the
  24662. default bridge authority via a one-hop tunnel, but once circuits
  24663. are established they will switch to a three-hop tunnel for later
  24664. connections to the bridge authority. Bugfix in 0.2.0.3-alpha.
  24665. o Major bugfixes (hidden services):
  24666. - Hidden services were choosing introduction points uniquely by
  24667. hexdigest, but when constructing the hidden service descriptor
  24668. they merely wrote the (potentially ambiguous) nickname.
  24669. - Clients now use the v2 intro format for hidden service
  24670. connections: they specify their chosen rendezvous point by identity
  24671. digest rather than by (potentially ambiguous) nickname. Both
  24672. are bugfixes on 0.1.2.x, and they could speed up hidden service
  24673. connections dramatically. Thanks to Karsten Loesing.
  24674. o Minor features (security):
  24675. - As a client, do not believe any server that tells us that an
  24676. address maps to an internal address space.
  24677. - Make it possible to enable HashedControlPassword and
  24678. CookieAuthentication at the same time.
  24679. o Minor features (guard nodes):
  24680. - Tag every guard node in our state file with the version that
  24681. we believe added it, or with our own version if we add it. This way,
  24682. if a user temporarily runs an old version of Tor and then switches
  24683. back to a new one, she doesn't automatically lose her guards.
  24684. o Minor features (speed):
  24685. - When implementing AES counter mode, update only the portions of the
  24686. counter buffer that need to change, and don't keep separate
  24687. network-order and host-order counters when they are the same (i.e.,
  24688. on big-endian hosts.)
  24689. o Minor features (controller):
  24690. - Accept LF instead of CRLF on controller, since some software has a
  24691. hard time generating real Internet newlines.
  24692. - Add GETINFO values for the server status events
  24693. "REACHABILITY_SUCCEEDED" and "GOOD_SERVER_DESCRIPTOR". Patch from
  24694. Robert Hogan.
  24695. o Removed features:
  24696. - Routers no longer include bandwidth-history lines in their
  24697. descriptors; this information is already available in extra-info
  24698. documents, and including it in router descriptors took up 60%
  24699. (!) of compressed router descriptor downloads. Completes
  24700. implementation of proposal 104.
  24701. - Remove the contrib scripts ExerciseServer.py, PathDemo.py,
  24702. and TorControl.py, as they use the old v0 controller protocol,
  24703. and are obsoleted by TorFlow anyway.
  24704. - Drop support for v1 rendezvous descriptors, since we never used
  24705. them anyway, and the code has probably rotted by now. Based on
  24706. patch from Karsten Loesing.
  24707. - On OSX, stop warning the user that kqueue support in libevent is
  24708. "experimental", since it seems to have worked fine for ages.
  24709. o Minor bugfixes:
  24710. - When generating information telling us how to extend to a given
  24711. router, do not try to include the nickname if it is absent. Fixes
  24712. bug 467. Bugfix on 0.2.0.3-alpha.
  24713. - Fix a user-triggerable (but not remotely-triggerable) segfault
  24714. in expand_filename(). Bugfix on 0.1.2.x.
  24715. - Fix a memory leak when freeing incomplete requests from DNSPort.
  24716. Found by Niels Provos with valgrind. Bugfix on 0.2.0.1-alpha.
  24717. - Don't try to access (or alter) the state file when running
  24718. --list-fingerprint or --verify-config or --hash-password. (Resolves
  24719. bug 499.) Bugfix on 0.1.2.x.
  24720. - Servers used to decline to publish their DirPort if their
  24721. BandwidthRate, RelayBandwidthRate, or MaxAdvertisedBandwidth
  24722. were below a threshold. Now they only look at BandwidthRate and
  24723. RelayBandwidthRate. Bugfix on 0.1.2.x.
  24724. - Remove an optimization in the AES counter-mode code that assumed
  24725. that the counter never exceeded 2^68. When the counter can be set
  24726. arbitrarily as an IV (as it is by Karsten's new hidden services
  24727. code), this assumption no longer holds. Bugfix on 0.1.2.x.
  24728. - Resume listing "AUTHORITY" flag for authorities in network status.
  24729. Bugfix on 0.2.0.3-alpha; reported by Alex de Joode.
  24730. o Code simplifications and refactoring:
  24731. - Revamp file-writing logic so we don't need to have the entire
  24732. contents of a file in memory at once before we write to disk. Tor,
  24733. meet stdio.
  24734. - Turn "descriptor store" into a full-fledged type.
  24735. - Move all NT services code into a separate source file.
  24736. - Unify all code that computes medians, percentile elements, etc.
  24737. - Get rid of a needless malloc when parsing address policies.
  24738. Changes in version 0.1.2.17 - 2007-08-30
  24739. Tor 0.1.2.17 features a new Vidalia version in the Windows and OS
  24740. X bundles. Vidalia 0.0.14 makes authentication required for the
  24741. ControlPort in the default configuration, which addresses important
  24742. security risks. Everybody who uses Vidalia (or another controller)
  24743. should upgrade.
  24744. In addition, this Tor update fixes major load balancing problems with
  24745. path selection, which should speed things up a lot once many people
  24746. have upgraded.
  24747. o Major bugfixes (security):
  24748. - We removed support for the old (v0) control protocol. It has been
  24749. deprecated since Tor 0.1.1.1-alpha, and keeping it secure has
  24750. become more of a headache than it's worth.
  24751. o Major bugfixes (load balancing):
  24752. - When choosing nodes for non-guard positions, weight guards
  24753. proportionally less, since they already have enough load. Patch
  24754. from Mike Perry.
  24755. - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
  24756. will allow fast Tor servers to get more attention.
  24757. - When we're upgrading from an old Tor version, forget our current
  24758. guards and pick new ones according to the new weightings. These
  24759. three load balancing patches could raise effective network capacity
  24760. by a factor of four. Thanks to Mike Perry for measurements.
  24761. o Major bugfixes (stream expiration):
  24762. - Expire not-yet-successful application streams in all cases if
  24763. they've been around longer than SocksTimeout. Right now there are
  24764. some cases where the stream will live forever, demanding a new
  24765. circuit every 15 seconds. Fixes bug 454; reported by lodger.
  24766. o Minor features (controller):
  24767. - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
  24768. is valid before any authentication has been received. It tells
  24769. a controller what kind of authentication is expected, and what
  24770. protocol is spoken. Implements proposal 119.
  24771. o Minor bugfixes (performance):
  24772. - Save on most routerlist_assert_ok() calls in routerlist.c, thus
  24773. greatly speeding up loading cached-routers from disk on startup.
  24774. - Disable sentinel-based debugging for buffer code: we squashed all
  24775. the bugs that this was supposed to detect a long time ago, and now
  24776. its only effect is to change our buffer sizes from nice powers of
  24777. two (which platform mallocs tend to like) to values slightly over
  24778. powers of two (which make some platform mallocs sad).
  24779. o Minor bugfixes (misc):
  24780. - If exit bandwidth ever exceeds one third of total bandwidth, then
  24781. use the correct formula to weight exit nodes when choosing paths.
  24782. Based on patch from Mike Perry.
  24783. - Choose perfectly fairly among routers when choosing by bandwidth and
  24784. weighting by fraction of bandwidth provided by exits. Previously, we
  24785. would choose with only approximate fairness, and correct ourselves
  24786. if we ran off the end of the list.
  24787. - If we require CookieAuthentication but we fail to write the
  24788. cookie file, we would warn but not exit, and end up in a state
  24789. where no controller could authenticate. Now we exit.
  24790. - If we require CookieAuthentication, stop generating a new cookie
  24791. every time we change any piece of our config.
  24792. - Refuse to start with certain directory authority keys, and
  24793. encourage people using them to stop.
  24794. - Terminate multi-line control events properly. Original patch
  24795. from tup.
  24796. - Fix a minor memory leak when we fail to find enough suitable
  24797. servers to choose a circuit.
  24798. - Stop leaking part of the descriptor when we run into a particularly
  24799. unparseable piece of it.
  24800. Changes in version 0.2.0.6-alpha - 2007-08-26
  24801. This sixth development snapshot features a new Vidalia version in the
  24802. Windows and OS X bundles. Vidalia 0.0.14 makes authentication required for
  24803. the ControlPort in the default configuration, which addresses important
  24804. security risks.
  24805. In addition, this snapshot fixes major load balancing problems
  24806. with path selection, which should speed things up a lot once many
  24807. people have upgraded. The directory authorities also use a new
  24808. mean-time-between-failure approach to tracking which servers are stable,
  24809. rather than just looking at the most recent uptime.
  24810. o New directory authorities:
  24811. - Set up Tonga as the default bridge directory authority.
  24812. o Major features:
  24813. - Directory authorities now track servers by weighted
  24814. mean-times-between-failures. When we have 4 or more days of data,
  24815. use measured MTBF rather than declared uptime to decide whether
  24816. to call a router Stable. Implements proposal 108.
  24817. o Major bugfixes (load balancing):
  24818. - When choosing nodes for non-guard positions, weight guards
  24819. proportionally less, since they already have enough load. Patch
  24820. from Mike Perry.
  24821. - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
  24822. will allow fast Tor servers to get more attention.
  24823. - When we're upgrading from an old Tor version, forget our current
  24824. guards and pick new ones according to the new weightings. These
  24825. three load balancing patches could raise effective network capacity
  24826. by a factor of four. Thanks to Mike Perry for measurements.
  24827. o Major bugfixes (descriptor parsing):
  24828. - Handle unexpected whitespace better in malformed descriptors. Bug
  24829. found using Benedikt Boss's new Tor fuzzer! Bugfix on 0.2.0.x.
  24830. o Minor features:
  24831. - There is now an ugly, temporary "desc/all-recent-extrainfo-hack"
  24832. GETINFO for Torstat to use until it can switch to using extrainfos.
  24833. - Optionally (if built with -DEXPORTMALLINFO) export the output
  24834. of mallinfo via http, as tor/mallinfo.txt. Only accessible
  24835. from localhost.
  24836. o Minor bugfixes:
  24837. - Do not intermix bridge routers with controller-added
  24838. routers. (Bugfix on 0.2.0.x)
  24839. - Do not fail with an assert when accept() returns an unexpected
  24840. address family. Addresses but does not wholly fix bug 483. (Bugfix
  24841. on 0.2.0.x)
  24842. - Let directory authorities startup even when they can't generate
  24843. a descriptor immediately, e.g. because they don't know their
  24844. address.
  24845. - Stop putting the authentication cookie in a file called "0"
  24846. in your working directory if you don't specify anything for the
  24847. new CookieAuthFile option. Reported by Matt Edman.
  24848. - Make it possible to read the PROTOCOLINFO response in a way that
  24849. conforms to our control-spec. Reported by Matt Edman.
  24850. - Fix a minor memory leak when we fail to find enough suitable
  24851. servers to choose a circuit. Bugfix on 0.1.2.x.
  24852. - Stop leaking part of the descriptor when we run into a particularly
  24853. unparseable piece of it. Bugfix on 0.1.2.x.
  24854. - Unmap the extrainfo cache file on exit.
  24855. Changes in version 0.2.0.5-alpha - 2007-08-19
  24856. This fifth development snapshot fixes compilation on Windows again;
  24857. fixes an obnoxious client-side bug that slowed things down and put
  24858. extra load on the network; gets us closer to using the v3 directory
  24859. voting scheme; makes it easier for Tor controllers to use cookie-based
  24860. authentication; and fixes a variety of other bugs.
  24861. o Removed features:
  24862. - Version 1 directories are no longer generated in full. Instead,
  24863. authorities generate and serve "stub" v1 directories that list
  24864. no servers. This will stop Tor versions 0.1.0.x and earlier from
  24865. working, but (for security reasons) nobody should be running those
  24866. versions anyway.
  24867. o Major bugfixes (compilation, 0.2.0.x):
  24868. - Try to fix Win32 compilation again: improve checking for IPv6 types.
  24869. - Try to fix MSVC compilation: build correctly on platforms that do
  24870. not define s6_addr16 or s6_addr32.
  24871. - Fix compile on platforms without getaddrinfo: bug found by Li-Hui
  24872. Zhou.
  24873. o Major bugfixes (stream expiration):
  24874. - Expire not-yet-successful application streams in all cases if
  24875. they've been around longer than SocksTimeout. Right now there are
  24876. some cases where the stream will live forever, demanding a new
  24877. circuit every 15 seconds. Bugfix on 0.1.2.7-alpha; fixes bug 454;
  24878. reported by lodger.
  24879. o Minor features (directory servers):
  24880. - When somebody requests a list of statuses or servers, and we have
  24881. none of those, return a 404 rather than an empty 200.
  24882. o Minor features (directory voting):
  24883. - Store v3 consensus status consensuses on disk, and reload them
  24884. on startup.
  24885. o Minor features (security):
  24886. - Warn about unsafe ControlPort configurations.
  24887. - Refuse to start with certain directory authority keys, and
  24888. encourage people using them to stop.
  24889. o Minor features (controller):
  24890. - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
  24891. is valid before any authentication has been received. It tells
  24892. a controller what kind of authentication is expected, and what
  24893. protocol is spoken. Implements proposal 119.
  24894. - New config option CookieAuthFile to choose a new location for the
  24895. cookie authentication file, and config option
  24896. CookieAuthFileGroupReadable to make it group-readable.
  24897. o Minor features (unit testing):
  24898. - Add command-line arguments to unit-test executable so that we can
  24899. invoke any chosen test from the command line rather than having
  24900. to run the whole test suite at once; and so that we can turn on
  24901. logging for the unit tests.
  24902. o Minor bugfixes (on 0.1.2.x):
  24903. - If we require CookieAuthentication but we fail to write the
  24904. cookie file, we would warn but not exit, and end up in a state
  24905. where no controller could authenticate. Now we exit.
  24906. - If we require CookieAuthentication, stop generating a new cookie
  24907. every time we change any piece of our config.
  24908. - When loading bandwidth history, do not believe any information in
  24909. the future. Fixes bug 434.
  24910. - When loading entry guard information, do not believe any information
  24911. in the future.
  24912. - When we have our clock set far in the future and generate an
  24913. onion key, then re-set our clock to be correct, we should not stop
  24914. the onion key from getting rotated.
  24915. - Clean up torrc sample config file.
  24916. - Do not automatically run configure from autogen.sh. This
  24917. non-standard behavior tended to annoy people who have built other
  24918. programs.
  24919. o Minor bugfixes (on 0.2.0.x):
  24920. - Fix a bug with AutomapHostsOnResolve that would always cause
  24921. the second request to fail. Bug reported by Kate. Bugfix on
  24922. 0.2.0.3-alpha.
  24923. - Fix a bug in ADDRMAP controller replies that would sometimes
  24924. try to print a NULL. Patch from tup.
  24925. - Read v3 directory authority keys from the right location.
  24926. - Numerous bugfixes to directory voting code.
  24927. Changes in version 0.1.2.16 - 2007-08-01
  24928. Tor 0.1.2.16 fixes a critical security vulnerability that allows a
  24929. remote attacker in certain situations to rewrite the user's torrc
  24930. configuration file. This can completely compromise anonymity of users
  24931. in most configurations, including those running the Vidalia bundles,
  24932. TorK, etc. Or worse.
  24933. o Major security fixes:
  24934. - Close immediately after missing authentication on control port;
  24935. do not allow multiple authentication attempts.
  24936. Changes in version 0.2.0.4-alpha - 2007-08-01
  24937. This fourth development snapshot fixes a critical security vulnerability
  24938. for most users, specifically those running Vidalia, TorK, etc. Everybody
  24939. should upgrade to either 0.1.2.16 or 0.2.0.4-alpha.
  24940. o Major security fixes:
  24941. - Close immediately after missing authentication on control port;
  24942. do not allow multiple authentication attempts.
  24943. o Major bugfixes (compilation):
  24944. - Fix win32 compilation: apparently IN_ADDR and IN6_ADDR are already
  24945. defined there.
  24946. o Minor features (performance):
  24947. - Be even more aggressive about releasing RAM from small
  24948. empty buffers. Thanks to our free-list code, this shouldn't be too
  24949. performance-intensive.
  24950. - Disable sentinel-based debugging for buffer code: we squashed all
  24951. the bugs that this was supposed to detect a long time ago, and
  24952. now its only effect is to change our buffer sizes from nice
  24953. powers of two (which platform mallocs tend to like) to values
  24954. slightly over powers of two (which make some platform mallocs sad).
  24955. - Log malloc statistics from mallinfo() on platforms where it
  24956. exists.
  24957. Changes in version 0.2.0.3-alpha - 2007-07-29
  24958. This third development snapshot introduces new experimental
  24959. blocking-resistance features and a preliminary version of the v3
  24960. directory voting design, and includes many other smaller features
  24961. and bugfixes.
  24962. o Major features:
  24963. - The first pieces of our "bridge" design for blocking-resistance
  24964. are implemented. People can run bridge directory authorities;
  24965. people can run bridges; and people can configure their Tor clients
  24966. with a set of bridges to use as the first hop into the Tor network.
  24967. See http://archives.seul.org/or/talk/Jul-2007/msg00249.html for
  24968. details.
  24969. - Create listener connections before we setuid to the configured
  24970. User and Group. Now non-Windows users can choose port values
  24971. under 1024, start Tor as root, and have Tor bind those ports
  24972. before it changes to another UID. (Windows users could already
  24973. pick these ports.)
  24974. - Added a new ConstrainedSockets config option to set SO_SNDBUF and
  24975. SO_RCVBUF on TCP sockets. Hopefully useful for Tor servers running
  24976. on "vserver" accounts. (Patch from coderman.)
  24977. - Be even more aggressive about separating local traffic from relayed
  24978. traffic when RelayBandwidthRate is set. (Refines proposal 111.)
  24979. o Major features (experimental):
  24980. - First cut of code for "v3 dir voting": directory authorities will
  24981. vote on a common network status document rather than each publishing
  24982. their own opinion. This code needs more testing and more corner-case
  24983. handling before it's ready for use.
  24984. o Security fixes:
  24985. - Directory authorities now call routers Fast if their bandwidth is
  24986. at least 100KB/s, and consider their bandwidth adequate to be a
  24987. Guard if it is at least 250KB/s, no matter the medians. This fix
  24988. complements proposal 107. [Bugfix on 0.1.2.x]
  24989. - Directory authorities now never mark more than 3 servers per IP as
  24990. Valid and Running. (Implements proposal 109, by Kevin Bauer and
  24991. Damon McCoy.)
  24992. - Minor change to organizationName and commonName generation
  24993. procedures in TLS certificates during Tor handshakes, to invalidate
  24994. some earlier censorware approaches. This is not a long-term
  24995. solution, but applying it will give us a bit of time to look into
  24996. the epidemiology of countermeasures as they spread.
  24997. o Major bugfixes (directory):
  24998. - Rewrite directory tokenization code to never run off the end of
  24999. a string. Fixes bug 455. Patch from croup. [Bugfix on 0.1.2.x]
  25000. o Minor features (controller):
  25001. - Add a SOURCE_ADDR field to STREAM NEW events so that controllers can
  25002. match requests to applications. (Patch from Robert Hogan.)
  25003. - Report address and port correctly on connections to DNSPort. (Patch
  25004. from Robert Hogan.)
  25005. - Add a RESOLVE command to launch hostname lookups. (Original patch
  25006. from Robert Hogan.)
  25007. - Add GETINFO status/enough-dir-info to let controllers tell whether
  25008. Tor has downloaded sufficient directory information. (Patch
  25009. from Tup.)
  25010. - You can now use the ControlSocket option to tell Tor to listen for
  25011. controller connections on Unix domain sockets on systems that
  25012. support them. (Patch from Peter Palfrader.)
  25013. - STREAM NEW events are generated for DNSPort requests and for
  25014. tunneled directory connections. (Patch from Robert Hogan.)
  25015. - New "GETINFO address-mappings/*" command to get address mappings
  25016. with expiry information. "addr-mappings/*" is now deprecated.
  25017. (Patch from Tup.)
  25018. o Minor features (misc):
  25019. - Merge in some (as-yet-unused) IPv6 address manipulation code. (Patch
  25020. from croup.)
  25021. - The tor-gencert tool for v3 directory authorities now creates all
  25022. files as readable to the file creator only, and write-protects
  25023. the authority identity key.
  25024. - When dumping memory usage, list bytes used in buffer memory
  25025. free-lists.
  25026. - When running with dmalloc, dump more stats on hup and on exit.
  25027. - Directory authorities now fail quickly and (relatively) harmlessly
  25028. if they generate a network status document that is somehow
  25029. malformed.
  25030. o Traffic load balancing improvements:
  25031. - If exit bandwidth ever exceeds one third of total bandwidth, then
  25032. use the correct formula to weight exit nodes when choosing paths.
  25033. (Based on patch from Mike Perry.)
  25034. - Choose perfectly fairly among routers when choosing by bandwidth and
  25035. weighting by fraction of bandwidth provided by exits. Previously, we
  25036. would choose with only approximate fairness, and correct ourselves
  25037. if we ran off the end of the list. [Bugfix on 0.1.2.x]
  25038. o Performance improvements:
  25039. - Be more aggressive with freeing buffer RAM or putting it on the
  25040. memory free lists.
  25041. - Use Critical Sections rather than Mutexes for synchronizing threads
  25042. on win32; Mutexes are heavier-weight, and designed for synchronizing
  25043. between processes.
  25044. o Deprecated and removed features:
  25045. - RedirectExits is now deprecated.
  25046. - Stop allowing address masks that do not correspond to bit prefixes.
  25047. We have warned about these for a really long time; now it's time
  25048. to reject them. (Patch from croup.)
  25049. o Minor bugfixes (directory):
  25050. - Fix another crash bug related to extra-info caching. (Bug found by
  25051. Peter Palfrader.) [Bugfix on 0.2.0.2-alpha]
  25052. - Directories no longer return a "304 not modified" when they don't
  25053. have the networkstatus the client asked for. Also fix a memory
  25054. leak when returning 304 not modified. [Bugfixes on 0.2.0.2-alpha]
  25055. - We had accidentally labelled 0.1.2.x directory servers as not
  25056. suitable for begin_dir requests, and had labelled no directory
  25057. servers as suitable for uploading extra-info documents. [Bugfix
  25058. on 0.2.0.1-alpha]
  25059. o Minor bugfixes (dns):
  25060. - Fix a crash when DNSPort is set more than once. (Patch from Robert
  25061. Hogan.) [Bugfix on 0.2.0.2-alpha]
  25062. - Add DNSPort connections to the global connection list, so that we
  25063. can time them out correctly. (Bug found by Robert Hogan.) [Bugfix
  25064. on 0.2.0.2-alpha]
  25065. - Fix a dangling reference that could lead to a crash when DNSPort is
  25066. changed or closed (Patch from Robert Hogan.) [Bugfix on
  25067. 0.2.0.2-alpha]
  25068. o Minor bugfixes (controller):
  25069. - Provide DNS expiry times in GMT, not in local time. For backward
  25070. compatibility, ADDRMAP events only provide GMT expiry in an extended
  25071. field. "GETINFO address-mappings" always does the right thing.
  25072. - Use CRLF line endings properly in NS events.
  25073. - Terminate multi-line control events properly. (Original patch
  25074. from tup.) [Bugfix on 0.1.2.x-alpha]
  25075. - Do not include spaces in SOURCE_ADDR fields in STREAM
  25076. events. Resolves bug 472. [Bugfix on 0.2.0.x-alpha]
  25077. Changes in version 0.1.2.15 - 2007-07-17
  25078. Tor 0.1.2.15 fixes several crash bugs, fixes some anonymity-related
  25079. problems, fixes compilation on BSD, and fixes a variety of other
  25080. bugs. Everybody should upgrade.
  25081. o Major bugfixes (compilation):
  25082. - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
  25083. o Major bugfixes (crashes):
  25084. - Try even harder not to dereference the first character after
  25085. an mmap(). Reported by lodger.
  25086. - Fix a crash bug in directory authorities when we re-number the
  25087. routerlist while inserting a new router.
  25088. - When the cached-routers file is an even multiple of the page size,
  25089. don't run off the end and crash. (Fixes bug 455; based on idea
  25090. from croup.)
  25091. - Fix eventdns.c behavior on Solaris: It is critical to include
  25092. orconfig.h _before_ sys/types.h, so that we can get the expected
  25093. definition of _FILE_OFFSET_BITS.
  25094. o Major bugfixes (security):
  25095. - Fix a possible buffer overrun when using BSD natd support. Bug
  25096. found by croup.
  25097. - When sending destroy cells from a circuit's origin, don't include
  25098. the reason for tearing down the circuit. The spec says we didn't,
  25099. and now we actually don't. Reported by lodger.
  25100. - Keep streamids from different exits on a circuit separate. This
  25101. bug may have allowed other routers on a given circuit to inject
  25102. cells into streams. Reported by lodger; fixes bug 446.
  25103. - If there's a never-before-connected-to guard node in our list,
  25104. never choose any guards past it. This way we don't expand our
  25105. guard list unless we need to.
  25106. o Minor bugfixes (guard nodes):
  25107. - Weight guard selection by bandwidth, so that low-bandwidth nodes
  25108. don't get overused as guards.
  25109. o Minor bugfixes (directory):
  25110. - Correctly count the number of authorities that recommend each
  25111. version. Previously, we were under-counting by 1.
  25112. - Fix a potential crash bug when we load many server descriptors at
  25113. once and some of them make others of them obsolete. Fixes bug 458.
  25114. o Minor bugfixes (hidden services):
  25115. - Stop tearing down the whole circuit when the user asks for a
  25116. connection to a port that the hidden service didn't configure.
  25117. Resolves bug 444.
  25118. o Minor bugfixes (misc):
  25119. - On Windows, we were preventing other processes from reading
  25120. cached-routers while Tor was running. Reported by janbar.
  25121. - Fix a possible (but very unlikely) bug in picking routers by
  25122. bandwidth. Add a log message to confirm that it is in fact
  25123. unlikely. Patch from lodger.
  25124. - Backport a couple of memory leak fixes.
  25125. - Backport miscellaneous cosmetic bugfixes.
  25126. Changes in version 0.2.0.2-alpha - 2007-06-02
  25127. o Major bugfixes on 0.2.0.1-alpha:
  25128. - Fix an assertion failure related to servers without extra-info digests.
  25129. Resolves bugs 441 and 442.
  25130. o Minor features (directory):
  25131. - Support "If-Modified-Since" when answering HTTP requests for
  25132. directories, running-routers documents, and network-status documents.
  25133. (There's no need to support it for router descriptors, since those
  25134. are downloaded by descriptor digest.)
  25135. o Minor build issues:
  25136. - Clear up some MIPSPro compiler warnings.
  25137. - When building from a tarball on a machine that happens to have SVK
  25138. installed, report the micro-revision as whatever version existed
  25139. in the tarball, not as "x".
  25140. Changes in version 0.2.0.1-alpha - 2007-06-01
  25141. This early development snapshot provides new features for people running
  25142. Tor as both a client and a server (check out the new RelayBandwidth
  25143. config options); lets Tor run as a DNS proxy; and generally moves us
  25144. forward on a lot of fronts.
  25145. o Major features, server usability:
  25146. - New config options RelayBandwidthRate and RelayBandwidthBurst:
  25147. a separate set of token buckets for relayed traffic. Right now
  25148. relayed traffic is defined as answers to directory requests, and
  25149. OR connections that don't have any local circuits on them.
  25150. o Major features, client usability:
  25151. - A client-side DNS proxy feature to replace the need for
  25152. dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen
  25153. for DNS requests on port 9999, use the Tor network to resolve them
  25154. anonymously, and send the reply back like a regular DNS server.
  25155. The code still only implements a subset of DNS.
  25156. - Make PreferTunneledDirConns and TunnelDirConns work even when
  25157. we have no cached directory info. This means Tor clients can now
  25158. do all of their connections protected by TLS.
  25159. o Major features, performance and efficiency:
  25160. - Directory authorities accept and serve "extra info" documents for
  25161. routers. These documents contain fields from router descriptors
  25162. that aren't usually needed, and that use a lot of excess
  25163. bandwidth. Once these fields are removed from router descriptors,
  25164. the bandwidth savings should be about 60%. [Partially implements
  25165. proposal 104.]
  25166. - Servers upload extra-info documents to any authority that accepts
  25167. them. Authorities (and caches that have been configured to download
  25168. extra-info documents) download them as needed. [Partially implements
  25169. proposal 104.]
  25170. - Change the way that Tor buffers data that it is waiting to write.
  25171. Instead of queueing data cells in an enormous ring buffer for each
  25172. client->OR or OR->OR connection, we now queue cells on a separate
  25173. queue for each circuit. This lets us use less slack memory, and
  25174. will eventually let us be smarter about prioritizing different kinds
  25175. of traffic.
  25176. - Use memory pools to allocate cells with better speed and memory
  25177. efficiency, especially on platforms where malloc() is inefficient.
  25178. - Stop reading on edge connections when their corresponding circuit
  25179. buffers are full; start again as the circuits empty out.
  25180. o Major features, other:
  25181. - Add an HSAuthorityRecordStats option that hidden service authorities
  25182. can use to track statistics of overall hidden service usage without
  25183. logging information that would be very useful to an attacker.
  25184. - Start work implementing multi-level keys for directory authorities:
  25185. Add a standalone tool to generate key certificates. (Proposal 103.)
  25186. o Security fixes:
  25187. - Directory authorities now call routers Stable if they have an
  25188. uptime of at least 30 days, even if that's not the median uptime
  25189. in the network. Implements proposal 107, suggested by Kevin Bauer
  25190. and Damon McCoy.
  25191. o Minor fixes (resource management):
  25192. - Count the number of open sockets separately from the number
  25193. of active connection_t objects. This will let us avoid underusing
  25194. our allocated connection limit.
  25195. - We no longer use socket pairs to link an edge connection to an
  25196. anonymous directory connection or a DirPort test connection.
  25197. Instead, we track the link internally and transfer the data
  25198. in-process. This saves two sockets per "linked" connection (at the
  25199. client and at the server), and avoids the nasty Windows socketpair()
  25200. workaround.
  25201. - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k
  25202. for every single inactive connection_t. Free items from the
  25203. 4k/16k-buffer free lists when they haven't been used for a while.
  25204. o Minor features (build):
  25205. - Make autoconf search for libevent, openssl, and zlib consistently.
  25206. - Update deprecated macros in configure.in.
  25207. - When warning about missing headers, tell the user to let us
  25208. know if the compile succeeds anyway, so we can downgrade the
  25209. warning.
  25210. - Include the current subversion revision as part of the version
  25211. string: either fetch it directly if we're in an SVN checkout, do
  25212. some magic to guess it if we're in an SVK checkout, or use
  25213. the last-detected version if we're building from a .tar.gz.
  25214. Use this version consistently in log messages.
  25215. o Minor features (logging):
  25216. - Always prepend "Bug: " to any log message about a bug.
  25217. - Put a platform string (e.g. "Linux i686") in the startup log
  25218. message, so when people paste just their logs, we know if it's
  25219. OpenBSD or Windows or what.
  25220. - When logging memory usage, break down memory used in buffers by
  25221. buffer type.
  25222. o Minor features (directory system):
  25223. - New config option V2AuthoritativeDirectory that all directory
  25224. authorities should set. This will let future authorities choose
  25225. not to serve V2 directory information.
  25226. - Directory authorities allow multiple router descriptors and/or extra
  25227. info documents to be uploaded in a single go. This will make
  25228. implementing proposal 104 simpler.
  25229. o Minor features (controller):
  25230. - Add a new config option __DisablePredictedCircuits designed for
  25231. use by the controller, when we don't want Tor to build any circuits
  25232. preemptively.
  25233. - Let the controller specify HOP=%d as an argument to ATTACHSTREAM,
  25234. so we can exit from the middle of the circuit.
  25235. - Implement "getinfo status/circuit-established".
  25236. - Implement "getinfo status/version/..." so a controller can tell
  25237. whether the current version is recommended, and whether any versions
  25238. are good, and how many authorities agree. (Patch from shibz.)
  25239. o Minor features (hidden services):
  25240. - Allow multiple HiddenServicePort directives with the same virtual
  25241. port; when they occur, the user is sent round-robin to one
  25242. of the target ports chosen at random. Partially fixes bug 393 by
  25243. adding limited ad-hoc round-robining.
  25244. o Minor features (other):
  25245. - More unit tests.
  25246. - Add a new AutomapHostsOnResolve option: when it is enabled, any
  25247. resolve request for hosts matching a given pattern causes Tor to
  25248. generate an internal virtual address mapping for that host. This
  25249. allows DNSPort to work sensibly with hidden service users. By
  25250. default, .exit and .onion addresses are remapped; the list of
  25251. patterns can be reconfigured with AutomapHostsSuffixes.
  25252. - Add an "-F" option to tor-resolve to force a resolve for a .onion
  25253. address. Thanks to the AutomapHostsOnResolve option, this is no
  25254. longer a completely silly thing to do.
  25255. - If Tor is invoked from something that isn't a shell (e.g. Vidalia),
  25256. now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman.
  25257. - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb,
  25258. minus 1 byte: the actual maximum declared bandwidth.
  25259. o Removed features:
  25260. - Removed support for the old binary "version 0" controller protocol.
  25261. This has been deprecated since 0.1.1, and warnings have been issued
  25262. since 0.1.2. When we encounter a v0 control message, we now send
  25263. back an error and close the connection.
  25264. - Remove the old "dns worker" server DNS code: it hasn't been default
  25265. since 0.1.2.2-alpha, and all the servers seem to be using the new
  25266. eventdns code.
  25267. o Minor bugfixes (portability):
  25268. - Even though Windows is equally happy with / and \ as path separators,
  25269. try to use \ consistently on Windows and / consistently on Unix: it
  25270. makes the log messages nicer.
  25271. - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE.
  25272. - Read resolv.conf files correctly on platforms where read() returns
  25273. partial results on small file reads.
  25274. o Minor bugfixes (directory):
  25275. - Correctly enforce that elements of directory objects do not appear
  25276. more often than they are allowed to appear.
  25277. - When we are reporting the DirServer line we just parsed, we were
  25278. logging the second stanza of the key fingerprint, not the first.
  25279. o Minor bugfixes (logging):
  25280. - When we hit an EOF on a log (probably because we're shutting down),
  25281. don't try to remove the log from the list: just mark it as
  25282. unusable. (Bulletproofs against bug 222.)
  25283. o Minor bugfixes (other):
  25284. - In the exitlist script, only consider the most recently published
  25285. server descriptor for each server. Also, when the user requests
  25286. a list of servers that _reject_ connections to a given address,
  25287. explicitly exclude the IPs that also have servers that accept
  25288. connections to that address. (Resolves bug 405.)
  25289. - Stop allowing hibernating servers to be "stable" or "fast".
  25290. - On Windows, we were preventing other processes from reading
  25291. cached-routers while Tor was running. (Reported by janbar)
  25292. - Make the NodeFamilies config option work. (Reported by
  25293. lodger -- it has never actually worked, even though we added it
  25294. in Oct 2004.)
  25295. - Check return values from pthread_mutex functions.
  25296. - Don't save non-general-purpose router descriptors to the disk cache,
  25297. because we have no way of remembering what their purpose was when
  25298. we restart.
  25299. - Add even more asserts to hunt down bug 417.
  25300. - Build without verbose warnings even on (not-yet-released) gcc 4.2.
  25301. - Fix a possible (but very unlikely) bug in picking routers by bandwidth.
  25302. Add a log message to confirm that it is in fact unlikely.
  25303. o Minor bugfixes (controller):
  25304. - Make 'getinfo fingerprint' return a 551 error if we're not a
  25305. server, so we match what the control spec claims we do. Reported
  25306. by daejees.
  25307. - Fix a typo in an error message when extendcircuit fails that
  25308. caused us to not follow the \r\n-based delimiter protocol. Reported
  25309. by daejees.
  25310. o Code simplifications and refactoring:
  25311. - Stop passing around circuit_t and crypt_path_t pointers that are
  25312. implicit in other procedure arguments.
  25313. - Drop the old code to choke directory connections when the
  25314. corresponding OR connections got full: thanks to the cell queue
  25315. feature, OR conns don't get full any more.
  25316. - Make dns_resolve() handle attaching connections to circuits
  25317. properly, so the caller doesn't have to.
  25318. - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw.
  25319. - Keep the connection array as a dynamic smartlist_t, rather than as
  25320. a fixed-sized array. This is important, as the number of connections
  25321. is becoming increasingly decoupled from the number of sockets.
  25322. Changes in version 0.1.2.14 - 2007-05-25
  25323. Tor 0.1.2.14 changes the addresses of two directory authorities (this
  25324. change especially affects those who serve or use hidden services),
  25325. and fixes several other crash- and security-related bugs.
  25326. o Directory authority changes:
  25327. - Two directory authorities (moria1 and moria2) just moved to new
  25328. IP addresses. This change will particularly affect those who serve
  25329. or use hidden services.
  25330. o Major bugfixes (crashes):
  25331. - If a directory server runs out of space in the connection table
  25332. as it's processing a begin_dir request, it will free the exit stream
  25333. but leave it attached to the circuit, leading to unpredictable
  25334. behavior. (Reported by seeess, fixes bug 425.)
  25335. - Fix a bug in dirserv_remove_invalid() that would cause authorities
  25336. to corrupt memory under some really unlikely scenarios.
  25337. - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
  25338. - Avoid segfaults when reading from mmaped descriptor file. (Reported
  25339. by lodger.)
  25340. o Major bugfixes (security):
  25341. - When choosing an entry guard for a circuit, avoid using guards
  25342. that are in the same family as the chosen exit -- not just guards
  25343. that are exactly the chosen exit. (Reported by lodger.)
  25344. o Major bugfixes (resource management):
  25345. - If a directory authority is down, skip it when deciding where to get
  25346. networkstatus objects or descriptors. Otherwise we keep asking
  25347. every 10 seconds forever. Fixes bug 384.
  25348. - Count it as a failure if we fetch a valid network-status but we
  25349. don't want to keep it. Otherwise we'll keep fetching it and keep
  25350. not wanting to keep it. Fixes part of bug 422.
  25351. - If all of our dirservers have given us bad or no networkstatuses
  25352. lately, then stop hammering them once per minute even when we
  25353. think they're failed. Fixes another part of bug 422.
  25354. o Minor bugfixes:
  25355. - Actually set the purpose correctly for descriptors inserted with
  25356. purpose=controller.
  25357. - When we have k non-v2 authorities in our DirServer config,
  25358. we ignored the last k authorities in the list when updating our
  25359. network-statuses.
  25360. - Correctly back-off from requesting router descriptors that we are
  25361. having a hard time downloading.
  25362. - Read resolv.conf files correctly on platforms where read() returns
  25363. partial results on small file reads.
  25364. - Don't rebuild the entire router store every time we get 32K of
  25365. routers: rebuild it when the journal gets very large, or when
  25366. the gaps in the store get very large.
  25367. o Minor features:
  25368. - When routers publish SVN revisions in their router descriptors,
  25369. authorities now include those versions correctly in networkstatus
  25370. documents.
  25371. - Warn when using a version of libevent before 1.3b to run a server on
  25372. OSX or BSD: these versions interact badly with userspace threads.
  25373. Changes in version 0.1.2.13 - 2007-04-24
  25374. This release features some major anonymity fixes, such as safer path
  25375. selection; better client performance; faster bootstrapping, better
  25376. address detection, and better DNS support for servers; write limiting as
  25377. well as read limiting to make servers easier to run; and a huge pile of
  25378. other features and bug fixes. The bundles also ship with Vidalia 0.0.11.
  25379. Tor 0.1.2.13 is released in memory of Rob Levin (1955-2006), aka lilo
  25380. of the Freenode IRC network, remembering his patience and vision for
  25381. free speech on the Internet.
  25382. o Minor fixes:
  25383. - Fix a memory leak when we ask for "all" networkstatuses and we
  25384. get one we don't recognize.
  25385. - Add more asserts to hunt down bug 417.
  25386. - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
  25387. Changes in version 0.1.2.12-rc - 2007-03-16
  25388. o Major bugfixes:
  25389. - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
  25390. directory information requested inside Tor connections (i.e. via
  25391. begin_dir cells). It only triggered when the same connection was
  25392. serving other data at the same time. Reported by seeess.
  25393. o Minor bugfixes:
  25394. - When creating a circuit via the controller, send a 'launched'
  25395. event when we're done, so we follow the spec better.
  25396. Changes in version 0.1.2.11-rc - 2007-03-15
  25397. o Minor bugfixes (controller), reported by daejees:
  25398. - Correct the control spec to match how the code actually responds
  25399. to 'getinfo addr-mappings/*'.
  25400. - The control spec described a GUARDS event, but the code
  25401. implemented a GUARD event. Standardize on GUARD, but let people
  25402. ask for GUARDS too.
  25403. Changes in version 0.1.2.10-rc - 2007-03-07
  25404. o Major bugfixes (Windows):
  25405. - Do not load the NT services library functions (which may not exist)
  25406. just to detect if we're a service trying to shut down. Now we run
  25407. on Win98 and friends again.
  25408. o Minor bugfixes (other):
  25409. - Clarify a couple of log messages.
  25410. - Fix a misleading socks5 error number.
  25411. Changes in version 0.1.2.9-rc - 2007-03-02
  25412. o Major bugfixes (Windows):
  25413. - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
  25414. of the usual GCC "%llu". This prevents a bug when saving 64-bit
  25415. int configuration values: the high-order 32 bits would get
  25416. truncated. In particular, we were being bitten by the default
  25417. MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
  25418. and maybe also bug 397.)
  25419. o Minor bugfixes (performance):
  25420. - Use OpenSSL's AES implementation on platforms where it's faster.
  25421. This could save us as much as 10% CPU usage.
  25422. o Minor bugfixes (server):
  25423. - Do not rotate onion key immediately after setting it for the first
  25424. time.
  25425. o Minor bugfixes (directory authorities):
  25426. - Stop calling servers that have been hibernating for a long time
  25427. "stable". Also, stop letting hibernating or obsolete servers affect
  25428. uptime and bandwidth cutoffs.
  25429. - Stop listing hibernating servers in the v1 directory.
  25430. o Minor bugfixes (hidden services):
  25431. - Upload hidden service descriptors slightly less often, to reduce
  25432. load on authorities.
  25433. o Minor bugfixes (other):
  25434. - Fix an assert that could trigger if a controller quickly set then
  25435. cleared EntryNodes. Bug found by Udo van den Heuvel.
  25436. - On architectures where sizeof(int)>4, still clamp declarable bandwidth
  25437. to INT32_MAX.
  25438. - Fix a potential race condition in the rpm installer. Found by
  25439. Stefan Nordhausen.
  25440. - Try to fix eventdns warnings once and for all: do not treat a dns rcode
  25441. of 2 as indicating that the server is completely bad; it sometimes
  25442. means that the server is just bad for the request in question. (may fix
  25443. the last of bug 326.)
  25444. - Disable encrypted directory connections when we don't have a server
  25445. descriptor for the destination. We'll get this working again in
  25446. the 0.2.0 branch.
  25447. Changes in version 0.1.2.8-beta - 2007-02-26
  25448. o Major bugfixes (crashes):
  25449. - Stop crashing when the controller asks us to resetconf more than
  25450. one config option at once. (Vidalia 0.0.11 does this.)
  25451. - Fix a crash that happened on Win98 when we're given command-line
  25452. arguments: don't try to load NT service functions from advapi32.dll
  25453. except when we need them. (Bug introduced in 0.1.2.7-alpha;
  25454. resolves bug 389.)
  25455. - Fix a longstanding obscure crash bug that could occur when
  25456. we run out of DNS worker processes. (Resolves bug 390.)
  25457. o Major bugfixes (hidden services):
  25458. - Correctly detect whether hidden service descriptor downloads are
  25459. in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
  25460. o Major bugfixes (accounting):
  25461. - When we start during an accounting interval before it's time to wake
  25462. up, remember to wake up at the correct time. (May fix bug 342.)
  25463. o Minor bugfixes (controller):
  25464. - Give the controller END_STREAM_REASON_DESTROY events _before_ we
  25465. clear the corresponding on_circuit variable, and remember later
  25466. that we don't need to send a redundant CLOSED event. Resolves part
  25467. 3 of bug 367.
  25468. - Report events where a resolve succeeded or where we got a socks
  25469. protocol error correctly, rather than calling both of them
  25470. "INTERNAL".
  25471. - Change reported stream target addresses to IP consistently when
  25472. we finally get the IP from an exit node.
  25473. - Send log messages to the controller even if they happen to be very
  25474. long.
  25475. o Minor bugfixes (other):
  25476. - Display correct results when reporting which versions are
  25477. recommended, and how recommended they are. (Resolves bug 383.)
  25478. - Improve our estimates for directory bandwidth to be less random:
  25479. guess that an unrecognized directory will have the average bandwidth
  25480. from all known directories, not that it will have the average
  25481. bandwidth from those directories earlier than it on the list.
  25482. - If we start a server with ClientOnly 1, then set ClientOnly to 0
  25483. and hup, stop triggering an assert based on an empty onion_key.
  25484. - On platforms with no working mmap() equivalent, don't warn the
  25485. user when cached-routers doesn't exist.
  25486. - Warn the user when mmap() [or its equivalent] fails for some reason
  25487. other than file-not-found.
  25488. - Don't warn the user when cached-routers.new doesn't exist: that's
  25489. perfectly fine when starting up for the first time.
  25490. - When EntryNodes are configured, rebuild the guard list to contain,
  25491. in order: the EntryNodes that were guards before; the rest of the
  25492. EntryNodes; the nodes that were guards before.
  25493. - Mask out all signals in sub-threads; only the libevent signal
  25494. handler should be processing them. This should prevent some crashes
  25495. on some machines using pthreads. (Patch from coderman.)
  25496. - Fix switched arguments on memset in the implementation of
  25497. tor_munmap() for systems with no mmap() call.
  25498. - When Tor receives a router descriptor that it asked for, but
  25499. no longer wants (because it has received fresh networkstatuses
  25500. in the meantime), do not warn the user. Cache the descriptor if
  25501. we're a cache; drop it if we aren't.
  25502. - Make earlier entry guards _really_ get retried when the network
  25503. comes back online.
  25504. - On a malformed DNS reply, always give an error to the corresponding
  25505. DNS request.
  25506. - Build with recent libevents on platforms that do not define the
  25507. nonstandard types "u_int8_t" and friends.
  25508. o Minor features (controller):
  25509. - Warn the user when an application uses the obsolete binary v0
  25510. control protocol. We're planning to remove support for it during
  25511. the next development series, so it's good to give people some
  25512. advance warning.
  25513. - Add STREAM_BW events to report per-entry-stream bandwidth
  25514. use. (Patch from Robert Hogan.)
  25515. - Rate-limit SIGNEWNYM signals in response to controllers that
  25516. impolitely generate them for every single stream. (Patch from
  25517. mwenge; closes bug 394.)
  25518. - Make REMAP stream events have a SOURCE (cache or exit), and
  25519. make them generated in every case where we get a successful
  25520. connected or resolved cell.
  25521. o Minor bugfixes (performance):
  25522. - Call router_have_min_dir_info half as often. (This is showing up in
  25523. some profiles, but not others.)
  25524. - When using GCC, make log_debug never get called at all, and its
  25525. arguments never get evaluated, when no debug logs are configured.
  25526. (This is showing up in some profiles, but not others.)
  25527. o Minor features:
  25528. - Remove some never-implemented options. Mark PathlenCoinWeight as
  25529. obsolete.
  25530. - Implement proposal 106: Stop requiring clients to have well-formed
  25531. certificates; stop checking nicknames in certificates. (Clients
  25532. have certificates so that they can look like Tor servers, but in
  25533. the future we might want to allow them to look like regular TLS
  25534. clients instead. Nicknames in certificates serve no purpose other
  25535. than making our protocol easier to recognize on the wire.)
  25536. - Revise messages on handshake failure again to be even more clear about
  25537. which are incoming connections and which are outgoing.
  25538. - Discard any v1 directory info that's over 1 month old (for
  25539. directories) or over 1 week old (for running-routers lists).
  25540. - Do not warn when individual nodes in the configuration's EntryNodes,
  25541. ExitNodes, etc are down: warn only when all possible nodes
  25542. are down. (Fixes bug 348.)
  25543. - Always remove expired routers and networkstatus docs before checking
  25544. whether we have enough information to build circuits. (Fixes
  25545. bug 373.)
  25546. - Put a lower-bound on MaxAdvertisedBandwidth.
  25547. Changes in version 0.1.2.7-alpha - 2007-02-06
  25548. o Major bugfixes (rate limiting):
  25549. - Servers decline directory requests much more aggressively when
  25550. they're low on bandwidth. Otherwise they end up queueing more and
  25551. more directory responses, which can't be good for latency.
  25552. - But never refuse directory requests from local addresses.
  25553. - Fix a memory leak when sending a 503 response for a networkstatus
  25554. request.
  25555. - Be willing to read or write on local connections (e.g. controller
  25556. connections) even when the global rate limiting buckets are empty.
  25557. - If our system clock jumps back in time, don't publish a negative
  25558. uptime in the descriptor. Also, don't let the global rate limiting
  25559. buckets go absurdly negative.
  25560. - Flush local controller connection buffers periodically as we're
  25561. writing to them, so we avoid queueing 4+ megabytes of data before
  25562. trying to flush.
  25563. o Major bugfixes (NT services):
  25564. - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
  25565. command-line flag so that admins can override the default by saying
  25566. "tor --service install --user "SomeUser"". This will not affect
  25567. existing installed services. Also, warn the user that the service
  25568. will look for its configuration file in the service user's
  25569. %appdata% directory. (We can't do the 'hardwire the user's appdata
  25570. directory' trick any more, since we may not have read access to that
  25571. directory.)
  25572. o Major bugfixes (other):
  25573. - Previously, we would cache up to 16 old networkstatus documents
  25574. indefinitely, if they came from nontrusted authorities. Now we
  25575. discard them if they are more than 10 days old.
  25576. - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
  25577. Del Vecchio).
  25578. - Detect and reject malformed DNS responses containing circular
  25579. pointer loops.
  25580. - If exits are rare enough that we're not marking exits as guards,
  25581. ignore exit bandwidth when we're deciding the required bandwidth
  25582. to become a guard.
  25583. - When we're handling a directory connection tunneled over Tor,
  25584. don't fill up internal memory buffers with all the data we want
  25585. to tunnel; instead, only add it if the OR connection that will
  25586. eventually receive it has some room for it. (This can lead to
  25587. slowdowns in tunneled dir connections; a better solution will have
  25588. to wait for 0.2.0.)
  25589. o Minor bugfixes (dns):
  25590. - Add some defensive programming to eventdns.c in an attempt to catch
  25591. possible memory-stomping bugs.
  25592. - Detect and reject DNS replies containing IPv4 or IPv6 records with
  25593. an incorrect number of bytes. (Previously, we would ignore the
  25594. extra bytes.)
  25595. - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
  25596. in the correct order, and doesn't crash.
  25597. - Free memory held in recently-completed DNS lookup attempts on exit.
  25598. This was not a memory leak, but may have been hiding memory leaks.
  25599. - Handle TTL values correctly on reverse DNS lookups.
  25600. - Treat failure to parse resolv.conf as an error.
  25601. o Minor bugfixes (other):
  25602. - Fix crash with "tor --list-fingerprint" (reported by seeess).
  25603. - When computing clock skew from directory HTTP headers, consider what
  25604. time it was when we finished asking for the directory, not what
  25605. time it is now.
  25606. - Expire socks connections if they spend too long waiting for the
  25607. handshake to finish. Previously we would let them sit around for
  25608. days, if the connecting application didn't close them either.
  25609. - And if the socks handshake hasn't started, don't send a
  25610. "DNS resolve socks failed" handshake reply; just close it.
  25611. - Stop using C functions that OpenBSD's linker doesn't like.
  25612. - Don't launch requests for descriptors unless we have networkstatuses
  25613. from at least half of the authorities. This delays the first
  25614. download slightly under pathological circumstances, but can prevent
  25615. us from downloading a bunch of descriptors we don't need.
  25616. - Do not log IPs with TLS failures for incoming TLS
  25617. connections. (Fixes bug 382.)
  25618. - If the user asks to use invalid exit nodes, be willing to use
  25619. unstable ones.
  25620. - Stop using the reserved ac_cv namespace in our configure script.
  25621. - Call stat() slightly less often; use fstat() when possible.
  25622. - Refactor the way we handle pending circuits when an OR connection
  25623. completes or fails, in an attempt to fix a rare crash bug.
  25624. - Only rewrite a conn's address based on X-Forwarded-For: headers
  25625. if it's a parseable public IP address; and stop adding extra quotes
  25626. to the resulting address.
  25627. o Major features:
  25628. - Weight directory requests by advertised bandwidth. Now we can
  25629. let servers enable write limiting but still allow most clients to
  25630. succeed at their directory requests. (We still ignore weights when
  25631. choosing a directory authority; I hope this is a feature.)
  25632. o Minor features:
  25633. - Create a new file ReleaseNotes which was the old ChangeLog. The
  25634. new ChangeLog file now includes the summaries for all development
  25635. versions too.
  25636. - Check for addresses with invalid characters at the exit as well
  25637. as at the client, and warn less verbosely when they fail. You can
  25638. override this by setting ServerDNSAllowNonRFC953Addresses to 1.
  25639. - Adapt a patch from goodell to let the contrib/exitlist script
  25640. take arguments rather than require direct editing.
  25641. - Inform the server operator when we decide not to advertise a
  25642. DirPort due to AccountingMax enabled or a low BandwidthRate. It
  25643. was confusing Zax, so now we're hopefully more helpful.
  25644. - Bring us one step closer to being able to establish an encrypted
  25645. directory tunnel without knowing a descriptor first. Still not
  25646. ready yet. As part of the change, now assume we can use a
  25647. create_fast cell if we don't know anything about a router.
  25648. - Allow exit nodes to use nameservers running on ports other than 53.
  25649. - Servers now cache reverse DNS replies.
  25650. - Add an --ignore-missing-torrc command-line option so that we can
  25651. get the "use sensible defaults if the configuration file doesn't
  25652. exist" behavior even when specifying a torrc location on the command
  25653. line.
  25654. o Minor features (controller):
  25655. - Track reasons for OR connection failure; make these reasons
  25656. available via the controller interface. (Patch from Mike Perry.)
  25657. - Add a SOCKS_BAD_HOSTNAME client status event so controllers
  25658. can learn when clients are sending malformed hostnames to Tor.
  25659. - Clean up documentation for controller status events.
  25660. - Add a REMAP status to stream events to note that a stream's
  25661. address has changed because of a cached address or a MapAddress
  25662. directive.
  25663. Changes in version 0.1.2.6-alpha - 2007-01-09
  25664. o Major bugfixes:
  25665. - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
  25666. connection handles more than 4 gigs in either direction, we crash.
  25667. - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
  25668. advertised exit node, somebody might try to exit from us when
  25669. we're bootstrapping and before we've built our descriptor yet.
  25670. Refuse the connection rather than crashing.
  25671. o Minor bugfixes:
  25672. - Warn if we (as a server) find that we've resolved an address that we
  25673. weren't planning to resolve.
  25674. - Warn that using select() on any libevent version before 1.1 will be
  25675. unnecessarily slow (even for select()).
  25676. - Flush ERR-level controller status events just like we currently
  25677. flush ERR-level log events, so that a Tor shutdown doesn't prevent
  25678. the controller from learning about current events.
  25679. o Minor features (more controller status events):
  25680. - Implement EXTERNAL_ADDRESS server status event so controllers can
  25681. learn when our address changes.
  25682. - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
  25683. can learn when directories reject our descriptor.
  25684. - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
  25685. can learn when a client application is speaking a non-socks protocol
  25686. to our SocksPort.
  25687. - Implement DANGEROUS_SOCKS client status event so controllers
  25688. can learn when a client application is leaking DNS addresses.
  25689. - Implement BUG general status event so controllers can learn when
  25690. Tor is unhappy about its internal invariants.
  25691. - Implement CLOCK_SKEW general status event so controllers can learn
  25692. when Tor thinks the system clock is set incorrectly.
  25693. - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
  25694. server status events so controllers can learn when their descriptors
  25695. are accepted by a directory.
  25696. - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
  25697. server status events so controllers can learn about Tor's progress in
  25698. deciding whether it's reachable from the outside.
  25699. - Implement BAD_LIBEVENT general status event so controllers can learn
  25700. when we have a version/method combination in libevent that needs to
  25701. be changed.
  25702. - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
  25703. and DNS_USELESS server status events so controllers can learn
  25704. about changes to DNS server status.
  25705. o Minor features (directory):
  25706. - Authorities no longer recommend exits as guards if this would shift
  25707. too much load to the exit nodes.
  25708. Changes in version 0.1.2.5-alpha - 2007-01-06
  25709. o Major features:
  25710. - Enable write limiting as well as read limiting. Now we sacrifice
  25711. capacity if we're pushing out lots of directory traffic, rather
  25712. than overrunning the user's intended bandwidth limits.
  25713. - Include TLS overhead when counting bandwidth usage; previously, we
  25714. would count only the bytes sent over TLS, but not the bytes used
  25715. to send them.
  25716. - Support running the Tor service with a torrc not in the same
  25717. directory as tor.exe and default to using the torrc located in
  25718. the %appdata%\Tor\ of the user who installed the service. Patch
  25719. from Matt Edman.
  25720. - Servers now check for the case when common DNS requests are going to
  25721. wildcarded addresses (i.e. all getting the same answer), and change
  25722. their exit policy to reject *:* if it's happening.
  25723. - Implement BEGIN_DIR cells, so we can connect to the directory
  25724. server via TLS to do encrypted directory requests rather than
  25725. plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
  25726. config options if you like.
  25727. o Minor features (config and docs):
  25728. - Start using the state file to store bandwidth accounting data:
  25729. the bw_accounting file is now obsolete. We'll keep generating it
  25730. for a while for people who are still using 0.1.2.4-alpha.
  25731. - Try to batch changes to the state file so that we do as few
  25732. disk writes as possible while still storing important things in
  25733. a timely fashion.
  25734. - The state file and the bw_accounting file get saved less often when
  25735. the AvoidDiskWrites config option is set.
  25736. - Make PIDFile work on Windows (untested).
  25737. - Add internal descriptions for a bunch of configuration options:
  25738. accessible via controller interface and in comments in saved
  25739. options files.
  25740. - Reject *:563 (NNTPS) in the default exit policy. We already reject
  25741. NNTP by default, so this seems like a sensible addition.
  25742. - Clients now reject hostnames with invalid characters. This should
  25743. avoid some inadvertent info leaks. Add an option
  25744. AllowNonRFC953Hostnames to disable this behavior, in case somebody
  25745. is running a private network with hosts called @, !, and #.
  25746. - Add a maintainer script to tell us which options are missing
  25747. documentation: "make check-docs".
  25748. - Add a new address-spec.txt document to describe our special-case
  25749. addresses: .exit, .onion, and .noconnnect.
  25750. o Minor features (DNS):
  25751. - Ongoing work on eventdns infrastructure: now it has dns server
  25752. and ipv6 support. One day Tor will make use of it.
  25753. - Add client-side caching for reverse DNS lookups.
  25754. - Add support to tor-resolve tool for reverse lookups and SOCKS5.
  25755. - When we change nameservers or IP addresses, reset and re-launch
  25756. our tests for DNS hijacking.
  25757. o Minor features (directory):
  25758. - Authorities now specify server versions in networkstatus. This adds
  25759. about 2% to the size of compressed networkstatus docs, and allows
  25760. clients to tell which servers support BEGIN_DIR and which don't.
  25761. The implementation is forward-compatible with a proposed future
  25762. protocol version scheme not tied to Tor versions.
  25763. - DirServer configuration lines now have an orport= option so
  25764. clients can open encrypted tunnels to the authorities without
  25765. having downloaded their descriptors yet. Enabled for moria1,
  25766. moria2, tor26, and lefkada now in the default configuration.
  25767. - Directory servers are more willing to send a 503 "busy" if they
  25768. are near their write limit, especially for v1 directory requests.
  25769. Now they can use their limited bandwidth for actual Tor traffic.
  25770. - Clients track responses with status 503 from dirservers. After a
  25771. dirserver has given us a 503, we try not to use it until an hour has
  25772. gone by, or until we have no dirservers that haven't given us a 503.
  25773. - When we get a 503 from a directory, and we're not a server, we don't
  25774. count the failure against the total number of failures allowed
  25775. for the thing we're trying to download.
  25776. - Report X-Your-Address-Is correctly from tunneled directory
  25777. connections; don't report X-Your-Address-Is when it's an internal
  25778. address; and never believe reported remote addresses when they're
  25779. internal.
  25780. - Protect against an unlikely DoS attack on directory servers.
  25781. - Add a BadDirectory flag to network status docs so that authorities
  25782. can (eventually) tell clients about caches they believe to be
  25783. broken.
  25784. o Minor features (controller):
  25785. - Have GETINFO dir/status/* work on hosts with DirPort disabled.
  25786. - Reimplement GETINFO so that info/names stays in sync with the
  25787. actual keys.
  25788. - Implement "GETINFO fingerprint".
  25789. - Implement "SETEVENTS GUARD" so controllers can get updates on
  25790. entry guard status as it changes.
  25791. o Minor features (clean up obsolete pieces):
  25792. - Remove some options that have been deprecated since at least
  25793. 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
  25794. SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
  25795. to set log options.
  25796. - We no longer look for identity and onion keys in "identity.key" and
  25797. "onion.key" -- these were replaced by secret_id_key and
  25798. secret_onion_key in 0.0.8pre1.
  25799. - We no longer require unrecognized directory entries to be
  25800. preceded by "opt".
  25801. o Major bugfixes (security):
  25802. - Stop sending the HttpProxyAuthenticator string to directory
  25803. servers when directory connections are tunnelled through Tor.
  25804. - Clients no longer store bandwidth history in the state file.
  25805. - Do not log introduction points for hidden services if SafeLogging
  25806. is set.
  25807. - When generating bandwidth history, round down to the nearest
  25808. 1k. When storing accounting data, round up to the nearest 1k.
  25809. - When we're running as a server, remember when we last rotated onion
  25810. keys, so that we will rotate keys once they're a week old even if
  25811. we never stay up for a week ourselves.
  25812. o Major bugfixes (other):
  25813. - Fix a longstanding bug in eventdns that prevented the count of
  25814. timed-out resolves from ever being reset. This bug caused us to
  25815. give up on a nameserver the third time it timed out, and try it
  25816. 10 seconds later... and to give up on it every time it timed out
  25817. after that.
  25818. - Take out the '5 second' timeout from the connection retry
  25819. schedule. Now the first connect attempt will wait a full 10
  25820. seconds before switching to a new circuit. Perhaps this will help
  25821. a lot. Based on observations from Mike Perry.
  25822. - Fix a bug on the Windows implementation of tor_mmap_file() that
  25823. would prevent the cached-routers file from ever loading. Reported
  25824. by John Kimble.
  25825. o Minor bugfixes:
  25826. - Fix an assert failure when a directory authority sets
  25827. AuthDirRejectUnlisted and then receives a descriptor from an
  25828. unlisted router. Reported by seeess.
  25829. - Avoid a double-free when parsing malformed DirServer lines.
  25830. - Fix a bug when a BSD-style PF socket is first used. Patch from
  25831. Fabian Keil.
  25832. - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
  25833. to resolve an address at a given exit node even when they ask for
  25834. it by name.
  25835. - Servers no longer ever list themselves in their "family" line,
  25836. even if configured to do so. This makes it easier to configure
  25837. family lists conveniently.
  25838. - When running as a server, don't fall back to 127.0.0.1 when no
  25839. nameservers are configured in /etc/resolv.conf; instead, make the
  25840. user fix resolv.conf or specify nameservers explicitly. (Resolves
  25841. bug 363.)
  25842. - Stop accepting certain malformed ports in configured exit policies.
  25843. - Don't re-write the fingerprint file every restart, unless it has
  25844. changed.
  25845. - Stop warning when a single nameserver fails: only warn when _all_ of
  25846. our nameservers have failed. Also, when we only have one nameserver,
  25847. raise the threshold for deciding that the nameserver is dead.
  25848. - Directory authorities now only decide that routers are reachable
  25849. if their identity keys are as expected.
  25850. - When the user uses bad syntax in the Log config line, stop
  25851. suggesting other bad syntax as a replacement.
  25852. - Correctly detect ipv6 DNS capability on OpenBSD.
  25853. o Minor bugfixes (controller):
  25854. - Report the circuit number correctly in STREAM CLOSED events. Bug
  25855. reported by Mike Perry.
  25856. - Do not report bizarre values for results of accounting GETINFOs
  25857. when the last second's write or read exceeds the allotted bandwidth.
  25858. - Report "unrecognized key" rather than an empty string when the
  25859. controller tries to fetch a networkstatus that doesn't exist.
  25860. Changes in version 0.1.1.26 - 2006-12-14
  25861. o Security bugfixes:
  25862. - Stop sending the HttpProxyAuthenticator string to directory
  25863. servers when directory connections are tunnelled through Tor.
  25864. - Clients no longer store bandwidth history in the state file.
  25865. - Do not log introduction points for hidden services if SafeLogging
  25866. is set.
  25867. o Minor bugfixes:
  25868. - Fix an assert failure when a directory authority sets
  25869. AuthDirRejectUnlisted and then receives a descriptor from an
  25870. unlisted router (reported by seeess).
  25871. Changes in version 0.1.2.4-alpha - 2006-12-03
  25872. o Major features:
  25873. - Add support for using natd; this allows FreeBSDs earlier than
  25874. 5.1.2 to have ipfw send connections through Tor without using
  25875. SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
  25876. o Minor features:
  25877. - Make all connections to addresses of the form ".noconnect"
  25878. immediately get closed. This lets application/controller combos
  25879. successfully test whether they're talking to the same Tor by
  25880. watching for STREAM events.
  25881. - Make cross.sh cross-compilation script work even when autogen.sh
  25882. hasn't been run. (Patch from Michael Mohr.)
  25883. - Statistics dumped by -USR2 now include a breakdown of public key
  25884. operations, for profiling.
  25885. o Major bugfixes:
  25886. - Fix a major leak when directory authorities parse their
  25887. approved-routers list, a minor memory leak when we fail to pick
  25888. an exit node, and a few rare leaks on errors.
  25889. - Handle TransPort connections even when the server sends data before
  25890. the client sends data. Previously, the connection would just hang
  25891. until the client sent data. (Patch from tup based on patch from
  25892. Zajcev Evgeny.)
  25893. - Avoid assert failure when our cached-routers file is empty on
  25894. startup.
  25895. o Minor bugfixes:
  25896. - Don't log spurious warnings when we see a circuit close reason we
  25897. don't recognize; it's probably just from a newer version of Tor.
  25898. - Have directory authorities allow larger amounts of drift in uptime
  25899. without replacing the server descriptor: previously, a server that
  25900. restarted every 30 minutes could have 48 "interesting" descriptors
  25901. per day.
  25902. - Start linking to the Tor specification and Tor reference manual
  25903. correctly in the Windows installer.
  25904. - Add Vidalia to the OS X uninstaller script, so when we uninstall
  25905. Tor/Privoxy we also uninstall Vidalia.
  25906. - Resume building on Irix64, and fix a lot of warnings from its
  25907. MIPSpro C compiler.
  25908. - Don't corrupt last_guessed_ip in router_new_address_suggestion()
  25909. when we're running as a client.
  25910. Changes in version 0.1.1.25 - 2006-11-04
  25911. o Major bugfixes:
  25912. - When a client asks us to resolve (rather than connect to)
  25913. an address, and we have a cached answer, give them the cached
  25914. answer. Previously, we would give them no answer at all.
  25915. - We were building exactly the wrong circuits when we predict
  25916. hidden service requirements, meaning Tor would have to build all
  25917. its circuits on demand.
  25918. - If none of our live entry guards have a high uptime, but we
  25919. require a guard with a high uptime, try adding a new guard before
  25920. we give up on the requirement. This patch should make long-lived
  25921. connections more stable on average.
  25922. - When testing reachability of our DirPort, don't launch new
  25923. tests when there's already one in progress -- unreachable
  25924. servers were stacking up dozens of testing streams.
  25925. o Security bugfixes:
  25926. - When the user sends a NEWNYM signal, clear the client-side DNS
  25927. cache too. Otherwise we continue to act on previous information.
  25928. o Minor bugfixes:
  25929. - Avoid a memory corruption bug when creating a hash table for
  25930. the first time.
  25931. - Avoid possibility of controller-triggered crash when misusing
  25932. certain commands from a v0 controller on platforms that do not
  25933. handle printf("%s",NULL) gracefully.
  25934. - Avoid infinite loop on unexpected controller input.
  25935. - Don't log spurious warnings when we see a circuit close reason we
  25936. don't recognize; it's probably just from a newer version of Tor.
  25937. - Add Vidalia to the OS X uninstaller script, so when we uninstall
  25938. Tor/Privoxy we also uninstall Vidalia.
  25939. Changes in version 0.1.2.3-alpha - 2006-10-29
  25940. o Minor features:
  25941. - Prepare for servers to publish descriptors less often: never
  25942. discard a descriptor simply for being too old until either it is
  25943. recommended by no authorities, or until we get a better one for
  25944. the same router. Make caches consider retaining old recommended
  25945. routers for even longer.
  25946. - If most authorities set a BadExit flag for a server, clients
  25947. don't think of it as a general-purpose exit. Clients only consider
  25948. authorities that advertise themselves as listing bad exits.
  25949. - Directory servers now provide 'Pragma: no-cache' and 'Expires'
  25950. headers for content, so that we can work better in the presence of
  25951. caching HTTP proxies.
  25952. - Allow authorities to list nodes as bad exits by fingerprint or by
  25953. address.
  25954. o Minor features, controller:
  25955. - Add a REASON field to CIRC events; for backward compatibility, this
  25956. field is sent only to controllers that have enabled the extended
  25957. event format. Also, add additional reason codes to explain why
  25958. a given circuit has been destroyed or truncated. (Patches from
  25959. Mike Perry)
  25960. - Add a REMOTE_REASON field to extended CIRC events to tell the
  25961. controller about why a remote OR told us to close a circuit.
  25962. - Stream events also now have REASON and REMOTE_REASON fields,
  25963. working much like those for circuit events.
  25964. - There's now a GETINFO ns/... field so that controllers can ask Tor
  25965. about the current status of a router.
  25966. - A new event type "NS" to inform a controller when our opinion of
  25967. a router's status has changed.
  25968. - Add a GETINFO events/names and GETINFO features/names so controllers
  25969. can tell which events and features are supported.
  25970. - A new CLEARDNSCACHE signal to allow controllers to clear the
  25971. client-side DNS cache without expiring circuits.
  25972. o Security bugfixes:
  25973. - When the user sends a NEWNYM signal, clear the client-side DNS
  25974. cache too. Otherwise we continue to act on previous information.
  25975. o Minor bugfixes:
  25976. - Avoid sending junk to controllers or segfaulting when a controller
  25977. uses EVENT_NEW_DESC with verbose nicknames.
  25978. - Stop triggering asserts if the controller tries to extend hidden
  25979. service circuits (reported by mwenge).
  25980. - Avoid infinite loop on unexpected controller input.
  25981. - When the controller does a "GETINFO network-status", tell it
  25982. about even those routers whose descriptors are very old, and use
  25983. long nicknames where appropriate.
  25984. - Change NT service functions to be loaded on demand. This lets us
  25985. build with MinGW without breaking Tor for Windows 98 users.
  25986. - Do DirPort reachability tests less often, since a single test
  25987. chews through many circuits before giving up.
  25988. - In the hidden service example in torrc.sample, stop recommending
  25989. esoteric and discouraged hidden service options.
  25990. - When stopping an NT service, wait up to 10 sec for it to actually
  25991. stop. Patch from Matt Edman; resolves bug 295.
  25992. - Fix handling of verbose nicknames with ORCONN controller events:
  25993. make them show up exactly when requested, rather than exactly when
  25994. not requested.
  25995. - When reporting verbose nicknames in entry_guards_getinfo(), avoid
  25996. printing a duplicate "$" in the keys we send (reported by mwenge).
  25997. - Correctly set maximum connection limit on Cygwin. (This time
  25998. for sure!)
  25999. - Try to detect Windows correctly when cross-compiling.
  26000. - Detect the size of the routers file correctly even if it is
  26001. corrupted (on systems without mmap) or not page-aligned (on systems
  26002. with mmap). This bug was harmless.
  26003. - Sometimes we didn't bother sending a RELAY_END cell when an attempt
  26004. to open a stream fails; now we do in more cases. This should
  26005. make clients able to find a good exit faster in some cases, since
  26006. unhandleable requests will now get an error rather than timing out.
  26007. - Resolve two memory leaks when rebuilding the on-disk router cache
  26008. (reported by fookoowa).
  26009. - Clean up minor code warnings suggested by the MIPSpro C compiler,
  26010. and reported by some Centos users.
  26011. - Controller signals now work on non-Unix platforms that don't define
  26012. SIGUSR1 and SIGUSR2 the way we expect.
  26013. - Patch from Michael Mohr to contrib/cross.sh, so it checks more
  26014. values before failing, and always enables eventdns.
  26015. - Libevent-1.2 exports, but does not define in its headers, strlcpy.
  26016. Try to fix this in configure.in by checking for most functions
  26017. before we check for libevent.
  26018. Changes in version 0.1.2.2-alpha - 2006-10-07
  26019. o Major features:
  26020. - Make our async eventdns library on-by-default for Tor servers,
  26021. and plan to deprecate the separate dnsworker threads.
  26022. - Add server-side support for "reverse" DNS lookups (using PTR
  26023. records so clients can determine the canonical hostname for a given
  26024. IPv4 address). Only supported by servers using eventdns; servers
  26025. now announce in their descriptors whether they support eventdns.
  26026. - Specify and implement client-side SOCKS5 interface for reverse DNS
  26027. lookups (see doc/socks-extensions.txt).
  26028. - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
  26029. connect to directory servers through Tor. Previously, clients needed
  26030. to find Tor exits to make private connections to directory servers.
  26031. - Avoid choosing Exit nodes for entry or middle hops when the
  26032. total bandwidth available from non-Exit nodes is much higher than
  26033. the total bandwidth available from Exit nodes.
  26034. - Workaround for name servers (like Earthlink's) that hijack failing
  26035. DNS requests and replace the no-such-server answer with a "helpful"
  26036. redirect to an advertising-driven search portal. Also work around
  26037. DNS hijackers who "helpfully" decline to hijack known-invalid
  26038. RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
  26039. lets you turn it off.
  26040. - Send out a burst of long-range padding cells once we've established
  26041. that we're reachable. Spread them over 4 circuits, so hopefully
  26042. a few will be fast. This exercises our bandwidth and bootstraps
  26043. us into the directory more quickly.
  26044. o New/improved config options:
  26045. - Add new config option "ResolvConf" to let the server operator
  26046. choose an alternate resolve.conf file when using eventdns.
  26047. - Add an "EnforceDistinctSubnets" option to control our "exclude
  26048. servers on the same /16" behavior. It's still on by default; this
  26049. is mostly for people who want to operate private test networks with
  26050. all the machines on the same subnet.
  26051. - If one of our entry guards is on the ExcludeNodes list, or the
  26052. directory authorities don't think it's a good guard, treat it as
  26053. if it were unlisted: stop using it as a guard, and throw it off
  26054. the guards list if it stays that way for a long time.
  26055. - Allow directory authorities to be marked separately as authorities
  26056. for the v1 directory protocol, the v2 directory protocol, and
  26057. as hidden service directories, to make it easier to retire old
  26058. authorities. V1 authorities should set "HSAuthoritativeDir 1"
  26059. to continue being hidden service authorities too.
  26060. - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
  26061. o Minor features, controller:
  26062. - Fix CIRC controller events so that controllers can learn the
  26063. identity digests of non-Named servers used in circuit paths.
  26064. - Let controllers ask for more useful identifiers for servers. Instead
  26065. of learning identity digests for un-Named servers and nicknames
  26066. for Named servers, the new identifiers include digest, nickname,
  26067. and indication of Named status. Off by default; see control-spec.txt
  26068. for more information.
  26069. - Add a "getinfo address" controller command so it can display Tor's
  26070. best guess to the user.
  26071. - New controller event to alert the controller when our server
  26072. descriptor has changed.
  26073. - Give more meaningful errors on controller authentication failure.
  26074. o Minor features, other:
  26075. - When asked to resolve a hostname, don't use non-exit servers unless
  26076. requested to do so. This allows servers with broken DNS to be
  26077. useful to the network.
  26078. - Divide eventdns log messages into warn and info messages.
  26079. - Reserve the nickname "Unnamed" for routers that can't pick
  26080. a hostname: any router can call itself Unnamed; directory
  26081. authorities will never allocate Unnamed to any particular router;
  26082. clients won't believe that any router is the canonical Unnamed.
  26083. - Only include function names in log messages for info/debug messages.
  26084. For notice/warn/err, the content of the message should be clear on
  26085. its own, and printing the function name only confuses users.
  26086. - Avoid some false positives during reachability testing: don't try
  26087. to test via a server that's on the same /24 as us.
  26088. - If we fail to build a circuit to an intended enclave, and it's
  26089. not mandatory that we use that enclave, stop wanting it.
  26090. - When eventdns is enabled, allow multithreaded builds on NetBSD and
  26091. OpenBSD. (We had previously disabled threads on these platforms
  26092. because they didn't have working thread-safe resolver functions.)
  26093. o Major bugfixes, anonymity/security:
  26094. - If a client asked for a server by name, and there's a named server
  26095. in our network-status but we don't have its descriptor yet, we
  26096. could return an unnamed server instead.
  26097. - Fix NetBSD bug that could allow someone to force uninitialized RAM
  26098. to be sent to a server's DNS resolver. This only affects NetBSD
  26099. and other platforms that do not bounds-check tolower().
  26100. - Reject (most) attempts to use Tor circuits with length one. (If
  26101. many people start using Tor as a one-hop proxy, exit nodes become
  26102. a more attractive target for compromise.)
  26103. - Just because your DirPort is open doesn't mean people should be
  26104. able to remotely teach you about hidden service descriptors. Now
  26105. only accept rendezvous posts if you've got HSAuthoritativeDir set.
  26106. o Major bugfixes, other:
  26107. - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
  26108. - When a client asks the server to resolve (not connect to)
  26109. an address, and it has a cached answer, give them the cached answer.
  26110. Previously, the server would give them no answer at all.
  26111. - Allow really slow clients to not hang up five minutes into their
  26112. directory downloads (suggested by Adam J. Richter).
  26113. - We were building exactly the wrong circuits when we anticipated
  26114. hidden service requirements, meaning Tor would have to build all
  26115. its circuits on demand.
  26116. - Avoid crashing when we mmap a router cache file of size 0.
  26117. - When testing reachability of our DirPort, don't launch new
  26118. tests when there's already one in progress -- unreachable
  26119. servers were stacking up dozens of testing streams.
  26120. o Minor bugfixes, correctness:
  26121. - If we're a directory mirror and we ask for "all" network status
  26122. documents, we would discard status documents from authorities
  26123. we don't recognize.
  26124. - Avoid a memory corruption bug when creating a hash table for
  26125. the first time.
  26126. - Avoid controller-triggered crash when misusing certain commands
  26127. from a v0 controller on platforms that do not handle
  26128. printf("%s",NULL) gracefully.
  26129. - Don't crash when a controller sends a third argument to an
  26130. "extendcircuit" request.
  26131. - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
  26132. response; fix error code when "getinfo dir/status/" fails.
  26133. - Avoid crash when telling controller stream-status and a stream
  26134. is detached.
  26135. - Patch from Adam Langley to fix assert() in eventdns.c.
  26136. - Fix a debug log message in eventdns to say "X resolved to Y"
  26137. instead of "X resolved to X".
  26138. - Make eventdns give strings for DNS errors, not just error numbers.
  26139. - Track unreachable entry guards correctly: don't conflate
  26140. 'unreachable by us right now' with 'listed as down by the directory
  26141. authorities'. With the old code, if a guard was unreachable by
  26142. us but listed as running, it would clog our guard list forever.
  26143. - Behave correctly in case we ever have a network with more than
  26144. 2GB/s total advertised capacity.
  26145. - Make TrackExitHosts case-insensitive, and fix the behavior of
  26146. ".suffix" TrackExitHosts items to avoid matching in the middle of
  26147. an address.
  26148. - Finally fix the openssl warnings from newer gccs that believe that
  26149. ignoring a return value is okay, but casting a return value and
  26150. then ignoring it is a sign of madness.
  26151. - Prevent the contrib/exitlist script from printing the same
  26152. result more than once.
  26153. - Patch from Steve Hildrey: Generate network status correctly on
  26154. non-versioning dirservers.
  26155. - Don't listen to the X-Your-Address-Is hint if you did the lookup
  26156. via Tor; otherwise you'll think you're the exit node's IP address.
  26157. o Minor bugfixes, performance:
  26158. - Two small performance improvements on parsing descriptors.
  26159. - Major performance improvement on inserting descriptors: change
  26160. algorithm from O(n^2) to O(n).
  26161. - Make the common memory allocation path faster on machines where
  26162. malloc(0) returns a pointer.
  26163. - Start remembering X-Your-Address-Is directory hints even if you're
  26164. a client, so you can become a server more smoothly.
  26165. - Avoid duplicate entries on MyFamily line in server descriptor.
  26166. o Packaging, features:
  26167. - Remove architecture from OS X builds. The official builds are
  26168. now universal binaries.
  26169. - The Debian package now uses --verify-config when (re)starting,
  26170. to distinguish configuration errors from other errors.
  26171. - Update RPMs to require libevent 1.1b.
  26172. o Packaging, bugfixes:
  26173. - Patches so Tor builds with MinGW on Windows.
  26174. - Patches so Tor might run on Cygwin again.
  26175. - Resume building on non-gcc compilers and ancient gcc. Resume
  26176. building with the -O0 compile flag. Resume building cleanly on
  26177. Debian woody.
  26178. - Run correctly on OS X platforms with case-sensitive filesystems.
  26179. - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
  26180. - Add autoconf checks so Tor can build on Solaris x86 again.
  26181. o Documentation
  26182. - Documented (and renamed) ServerDNSSearchDomains and
  26183. ServerDNSResolvConfFile options.
  26184. - Be clearer that the *ListenAddress directives can be repeated
  26185. multiple times.
  26186. Changes in version 0.1.1.24 - 2006-09-29
  26187. o Major bugfixes:
  26188. - Allow really slow clients to not hang up five minutes into their
  26189. directory downloads (suggested by Adam J. Richter).
  26190. - Fix major performance regression from 0.1.0.x: instead of checking
  26191. whether we have enough directory information every time we want to
  26192. do something, only check when the directory information has changed.
  26193. This should improve client CPU usage by 25-50%.
  26194. - Don't crash if, after a server has been running for a while,
  26195. it can't resolve its hostname.
  26196. o Minor bugfixes:
  26197. - Allow Tor to start when RunAsDaemon is set but no logs are set.
  26198. - Don't crash when the controller receives a third argument to an
  26199. "extendcircuit" request.
  26200. - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
  26201. response; fix error code when "getinfo dir/status/" fails.
  26202. - Fix configure.in to not produce broken configure files with
  26203. more recent versions of autoconf. Thanks to Clint for his auto*
  26204. voodoo.
  26205. - Fix security bug on NetBSD that could allow someone to force
  26206. uninitialized RAM to be sent to a server's DNS resolver. This
  26207. only affects NetBSD and other platforms that do not bounds-check
  26208. tolower().
  26209. - Warn user when using libevent 1.1a or earlier with win32 or kqueue
  26210. methods: these are known to be buggy.
  26211. - If we're a directory mirror and we ask for "all" network status
  26212. documents, we would discard status documents from authorities
  26213. we don't recognize.
  26214. Changes in version 0.1.2.1-alpha - 2006-08-27
  26215. o Major features:
  26216. - Add "eventdns" async dns library from Adam Langley, tweaked to
  26217. build on OSX and Windows. Only enabled if you pass the
  26218. --enable-eventdns argument to configure.
  26219. - Allow servers with no hostname or IP address to learn their
  26220. IP address by asking the directory authorities. This code only
  26221. kicks in when you would normally have exited with a "no address"
  26222. error. Nothing's authenticated, so use with care.
  26223. - Rather than waiting a fixed amount of time between retrying
  26224. application connections, we wait only 5 seconds for the first,
  26225. 10 seconds for the second, and 15 seconds for each retry after
  26226. that. Hopefully this will improve the expected user experience.
  26227. - Patch from Tup to add support for transparent AP connections:
  26228. this basically bundles the functionality of trans-proxy-tor
  26229. into the Tor mainline. Now hosts with compliant pf/netfilter
  26230. implementations can redirect TCP connections straight to Tor
  26231. without diverting through SOCKS. Needs docs.
  26232. - Busy directory servers save lots of memory by spooling server
  26233. descriptors, v1 directories, and v2 networkstatus docs to buffers
  26234. as needed rather than en masse. Also mmap the cached-routers
  26235. files, so we don't need to keep the whole thing in memory too.
  26236. - Automatically avoid picking more than one node from the same
  26237. /16 network when constructing a circuit.
  26238. - Revise and clean up the torrc.sample that we ship with; add
  26239. a section for BandwidthRate and BandwidthBurst.
  26240. o Minor features:
  26241. - Split circuit_t into origin_circuit_t and or_circuit_t, and
  26242. split connection_t into edge, or, dir, control, and base structs.
  26243. These will save quite a bit of memory on busy servers, and they'll
  26244. also help us track down bugs in the code and bugs in the spec.
  26245. - Experimentally re-enable kqueue on OSX when using libevent 1.1b
  26246. or later. Log when we are doing this, so we can diagnose it when
  26247. it fails. (Also, recommend libevent 1.1b for kqueue and
  26248. win32 methods; deprecate libevent 1.0b harder; make libevent
  26249. recommendation system saner.)
  26250. - Start being able to build universal binaries on OS X (thanks
  26251. to Phobos).
  26252. - Export the default exit policy via the control port, so controllers
  26253. don't need to guess what it is / will be later.
  26254. - Add a man page entry for ProtocolWarnings.
  26255. - Add TestVia config option to the man page.
  26256. - Remove even more protocol-related warnings from Tor server logs,
  26257. such as bad TLS handshakes and malformed begin cells.
  26258. - Stop fetching descriptors if you're not a dir mirror and you
  26259. haven't tried to establish any circuits lately. [This currently
  26260. causes some dangerous behavior, because when you start up again
  26261. you'll use your ancient server descriptors.]
  26262. - New DirPort behavior: if you have your dirport set, you download
  26263. descriptors aggressively like a directory mirror, whether or not
  26264. your ORPort is set.
  26265. - Get rid of the router_retry_connections notion. Now routers
  26266. no longer try to rebuild long-term connections to directory
  26267. authorities, and directory authorities no longer try to rebuild
  26268. long-term connections to all servers. We still don't hang up
  26269. connections in these two cases though -- we need to look at it
  26270. more carefully to avoid flapping, and we likely need to wait til
  26271. 0.1.1.x is obsolete.
  26272. - Drop compatibility with obsolete Tors that permit create cells
  26273. to have the wrong circ_id_type.
  26274. - Re-enable per-connection rate limiting. Get rid of the "OP
  26275. bandwidth" concept. Lay groundwork for "bandwidth classes" --
  26276. separate global buckets that apply depending on what sort of conn
  26277. it is.
  26278. - Start publishing one minute or so after we find our ORPort
  26279. to be reachable. This will help reduce the number of descriptors
  26280. we have for ourselves floating around, since it's quite likely
  26281. other things (e.g. DirPort) will change during that minute too.
  26282. - Fork the v1 directory protocol into its own spec document,
  26283. and mark dir-spec.txt as the currently correct (v2) spec.
  26284. o Major bugfixes:
  26285. - When we find our DirPort to be reachable, publish a new descriptor
  26286. so we'll tell the world (reported by pnx).
  26287. - Publish a new descriptor after we hup/reload. This is important
  26288. if our config has changed such that we'll want to start advertising
  26289. our DirPort now, etc.
  26290. - Allow Tor to start when RunAsDaemon is set but no logs are set.
  26291. - When we have a state file we cannot parse, tell the user and
  26292. move it aside. Now we avoid situations where the user starts
  26293. Tor in 1904, Tor writes a state file with that timestamp in it,
  26294. the user fixes her clock, and Tor refuses to start.
  26295. - Fix configure.in to not produce broken configure files with
  26296. more recent versions of autoconf. Thanks to Clint for his auto*
  26297. voodoo.
  26298. - "tor --verify-config" now exits with -1(255) or 0 depending on
  26299. whether the config options are bad or good.
  26300. - Resolve bug 321 when using dnsworkers: append a period to every
  26301. address we resolve at the exit node, so that we do not accidentally
  26302. pick up local addresses, and so that failing searches are retried
  26303. in the resolver search domains. (This is already solved for
  26304. eventdns.) (This breaks Blossom servers for now.)
  26305. - If we are using an exit enclave and we can't connect, e.g. because
  26306. its webserver is misconfigured to not listen on localhost, then
  26307. back off and try connecting from somewhere else before we fail.
  26308. o Minor bugfixes:
  26309. - Start compiling on MinGW on Windows (patches from Mike Chiussi).
  26310. - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
  26311. - Fix bug 314: Tor clients issued "unsafe socks" warnings even
  26312. when the IP address is mapped through MapAddress to a hostname.
  26313. - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
  26314. useless IPv6 DNS resolves.
  26315. - Patch suggested by Karsten Loesing: respond to SIGNAL command
  26316. before we execute the signal, in case the signal shuts us down.
  26317. - Clean up AllowInvalidNodes man page entry.
  26318. - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
  26319. - Add more asserts to track down an assert error on a windows Tor
  26320. server with connection_add being called with socket == -1.
  26321. - Handle reporting OR_CONN_EVENT_NEW events to the controller.
  26322. - Fix misleading log messages: an entry guard that is "unlisted",
  26323. as well as not known to be "down" (because we've never heard
  26324. of it), is not therefore "up".
  26325. - Remove code to special-case "-cvs" ending, since it has not
  26326. actually mattered since 0.0.9.
  26327. - Make our socks5 handling more robust to broken socks clients:
  26328. throw out everything waiting on the buffer in between socks
  26329. handshake phases, since they can't possibly (so the theory
  26330. goes) have predicted what we plan to respond to them.
  26331. Changes in version 0.1.1.23 - 2006-07-30
  26332. o Major bugfixes:
  26333. - Fast Tor servers, especially exit nodes, were triggering asserts
  26334. due to a bug in handling the list of pending DNS resolves. Some
  26335. bugs still remain here; we're hunting them.
  26336. - Entry guards could crash clients by sending unexpected input.
  26337. - More fixes on reachability testing: if you find yourself reachable,
  26338. then don't ever make any client requests (so you stop predicting
  26339. circuits), then hup or have your clock jump, then later your IP
  26340. changes, you won't think circuits are working, so you won't try to
  26341. test reachability, so you won't publish.
  26342. o Minor bugfixes:
  26343. - Avoid a crash if the controller does a resetconf firewallports
  26344. and then a setconf fascistfirewall=1.
  26345. - Avoid an integer underflow when the dir authority decides whether
  26346. a router is stable: we might wrongly label it stable, and compute
  26347. a slightly wrong median stability, when a descriptor is published
  26348. later than now.
  26349. - Fix a place where we might trigger an assert if we can't build our
  26350. own server descriptor yet.
  26351. Changes in version 0.1.1.22 - 2006-07-05
  26352. o Major bugfixes:
  26353. - Fix a big bug that was causing servers to not find themselves
  26354. reachable if they changed IP addresses. Since only 0.1.1.22+
  26355. servers can do reachability testing correctly, now we automatically
  26356. make sure to test via one of these.
  26357. - Fix to allow clients and mirrors to learn directory info from
  26358. descriptor downloads that get cut off partway through.
  26359. - Directory authorities had a bug in deciding if a newly published
  26360. descriptor was novel enough to make everybody want a copy -- a few
  26361. servers seem to be publishing new descriptors many times a minute.
  26362. o Minor bugfixes:
  26363. - Fix a rare bug that was causing some servers to complain about
  26364. "closing wedged cpuworkers" and skip some circuit create requests.
  26365. - Make the Exit flag in directory status documents actually work.
  26366. Changes in version 0.1.1.21 - 2006-06-10
  26367. o Crash and assert fixes from 0.1.1.20:
  26368. - Fix a rare crash on Tor servers that have enabled hibernation.
  26369. - Fix a seg fault on startup for Tor networks that use only one
  26370. directory authority.
  26371. - Fix an assert from a race condition that occurs on Tor servers
  26372. while exiting, where various threads are trying to log that they're
  26373. exiting, and delete the logs, at the same time.
  26374. - Make our unit tests pass again on certain obscure platforms.
  26375. o Other fixes:
  26376. - Add support for building SUSE RPM packages.
  26377. - Speed up initial bootstrapping for clients: if we are making our
  26378. first ever connection to any entry guard, then don't mark it down
  26379. right after that.
  26380. - When only one Tor server in the network is labelled as a guard,
  26381. and we've already picked him, we would cycle endlessly picking him
  26382. again, being unhappy about it, etc. Now we specifically exclude
  26383. current guards when picking a new guard.
  26384. - Servers send create cells more reliably after the TLS connection
  26385. is established: we were sometimes forgetting to send half of them
  26386. when we had more than one pending.
  26387. - If we get a create cell that asks us to extend somewhere, but the
  26388. Tor server there doesn't match the expected digest, we now send
  26389. a destroy cell back, rather than silently doing nothing.
  26390. - Make options->RedirectExit work again.
  26391. - Make cookie authentication for the controller work again.
  26392. - Stop being picky about unusual characters in the arguments to
  26393. mapaddress. It's none of our business.
  26394. - Add a new config option "TestVia" that lets you specify preferred
  26395. middle hops to use for test circuits. Perhaps this will let me
  26396. debug the reachability problems better.
  26397. o Log / documentation fixes:
  26398. - If we're a server and some peer has a broken TLS certificate, don't
  26399. log about it unless ProtocolWarnings is set, i.e., we want to hear
  26400. about protocol violations by others.
  26401. - Fix spelling of VirtualAddrNetwork in man page.
  26402. - Add a better explanation at the top of the autogenerated torrc file
  26403. about what happened to our old torrc.
  26404. Changes in version 0.1.1.20 - 2006-05-23
  26405. o Bugfixes:
  26406. - Downgrade a log severity where servers complain that they're
  26407. invalid.
  26408. - Avoid a compile warning on FreeBSD.
  26409. - Remove string size limit on NEWDESC messages; solve bug 291.
  26410. - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
  26411. more thoroughly when we're running on windows.
  26412. Changes in version 0.1.1.19-rc - 2006-05-03
  26413. o Minor bugs:
  26414. - Regenerate our local descriptor if it's dirty and we try to use
  26415. it locally (e.g. if it changes during reachability detection).
  26416. - If we setconf our ORPort to 0, we continued to listen on the
  26417. old ORPort and receive connections.
  26418. - Avoid a second warning about machine/limits.h on Debian
  26419. GNU/kFreeBSD.
  26420. - Be willing to add our own routerinfo into the routerlist.
  26421. Now authorities will include themselves in their directories
  26422. and network-statuses.
  26423. - Stop trying to upload rendezvous descriptors to every
  26424. directory authority: only try the v1 authorities.
  26425. - Servers no longer complain when they think they're not
  26426. registered with the directory authorities. There were too many
  26427. false positives.
  26428. - Backport dist-rpm changes so rpms can be built without errors.
  26429. o Features:
  26430. - Implement an option, VirtualAddrMask, to set which addresses
  26431. get handed out in response to mapaddress requests. This works
  26432. around a bug in tsocks where 127.0.0.0/8 is never socksified.
  26433. Changes in version 0.1.1.18-rc - 2006-04-10
  26434. o Major fixes:
  26435. - Work harder to download live network-statuses from all the
  26436. directory authorities we know about. Improve the threshold
  26437. decision logic so we're more robust to edge cases.
  26438. - When fetching rendezvous descriptors, we were willing to ask
  26439. v2 authorities too, which would always return 404.
  26440. o Minor fixes:
  26441. - Stop listing down or invalid nodes in the v1 directory. This will
  26442. reduce its bulk by about 1/3, and reduce load on directory
  26443. mirrors.
  26444. - When deciding whether a router is Fast or Guard-worthy, consider
  26445. his advertised BandwidthRate and not just the BandwidthCapacity.
  26446. - No longer ship INSTALL and README files -- they are useless now.
  26447. - Force rpmbuild to behave and honor target_cpu.
  26448. - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
  26449. - Start to include translated versions of the tor-doc-*.html
  26450. files, along with the screenshots. Still needs more work.
  26451. - Start sending back 512 and 451 errors if mapaddress fails,
  26452. rather than not sending anything back at all.
  26453. - When we fail to bind or listen on an incoming or outgoing
  26454. socket, we should close it before failing. otherwise we just
  26455. leak it. (thanks to weasel for finding.)
  26456. - Allow "getinfo dir/status/foo" to work, as long as your DirPort
  26457. is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
  26458. - Make NoPublish (even though deprecated) work again.
  26459. - Fix a minor security flaw where a versioning auth dirserver
  26460. could list a recommended version many times in a row to make
  26461. clients more convinced that it's recommended.
  26462. - Fix crash bug if there are two unregistered servers running
  26463. with the same nickname, one of them is down, and you ask for
  26464. them by nickname in your EntryNodes or ExitNodes. Also, try
  26465. to pick the one that's running rather than an arbitrary one.
  26466. - Fix an infinite loop we could hit if we go offline for too long.
  26467. - Complain when we hit WSAENOBUFS on recv() or write() too.
  26468. Perhaps this will help us hunt the bug.
  26469. - If you're not a versioning dirserver, don't put the string
  26470. "client-versions \nserver-versions \n" in your network-status.
  26471. - Lower the minimum required number of file descriptors to 1000,
  26472. so we can have some overhead for Valgrind on Linux, where the
  26473. default ulimit -n is 1024.
  26474. o New features:
  26475. - Add tor.dizum.com as the fifth authoritative directory server.
  26476. - Add a new config option FetchUselessDescriptors, off by default,
  26477. for when you plan to run "exitlist" on your client and you want
  26478. to know about even the non-running descriptors.
  26479. Changes in version 0.1.1.17-rc - 2006-03-28
  26480. o Major fixes:
  26481. - Clients and servers since 0.1.1.10-alpha have been expiring
  26482. connections whenever they are idle for 5 minutes and they *do*
  26483. have circuits on them. Oops. With this new version, clients will
  26484. discard their previous entry guard choices and avoid choosing
  26485. entry guards running these flawed versions.
  26486. - Fix memory leak when uncompressing concatenated zlib streams. This
  26487. was causing substantial leaks over time on Tor servers.
  26488. - The v1 directory was including servers as much as 48 hours old,
  26489. because that's how the new routerlist->routers works. Now only
  26490. include them if they're 20 hours old or less.
  26491. o Minor fixes:
  26492. - Resume building on irix64, netbsd 2.0, etc.
  26493. - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
  26494. "-Wall -g -O2".
  26495. - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
  26496. and it is confusing some users.
  26497. - Mirrors stop caching the v1 directory so often.
  26498. - Make the max number of old descriptors that a cache will hold
  26499. rise with the number of directory authorities, so we can scale.
  26500. - Change our win32 uname() hack to be more forgiving about what
  26501. win32 versions it thinks it's found.
  26502. o New features:
  26503. - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
  26504. server.
  26505. - When the controller's *setconf commands fail, collect an error
  26506. message in a string and hand it back to the controller.
  26507. - Make the v2 dir's "Fast" flag based on relative capacity, just
  26508. like "Stable" is based on median uptime. Name everything in the
  26509. top 7/8 Fast, and only the top 1/2 gets to be a Guard.
  26510. - Log server fingerprint on startup, so new server operators don't
  26511. have to go hunting around their filesystem for it.
  26512. - Return a robots.txt on our dirport to discourage google indexing.
  26513. - Let the controller ask for GETINFO dir/status/foo so it can ask
  26514. directly rather than connecting to the dir port. Only works when
  26515. dirport is set for now.
  26516. o New config options rather than constants in the code:
  26517. - SocksTimeout: How long do we let a socks connection wait
  26518. unattached before we fail it?
  26519. - CircuitBuildTimeout: Cull non-open circuits that were born
  26520. at least this many seconds ago.
  26521. - CircuitIdleTimeout: Cull open clean circuits that were born
  26522. at least this many seconds ago.
  26523. Changes in version 0.1.1.16-rc - 2006-03-18
  26524. o Bugfixes on 0.1.1.15-rc:
  26525. - Fix assert when the controller asks to attachstream a connect-wait
  26526. or resolve-wait stream.
  26527. - Now do address rewriting when the controller asks us to attach
  26528. to a particular circuit too. This will let Blossom specify
  26529. "moria2.exit" without having to learn what moria2's IP address is.
  26530. - Make the "tor --verify-config" command-line work again, so people
  26531. can automatically check if their torrc will parse.
  26532. - Authoritative dirservers no longer require an open connection from
  26533. a server to consider him "reachable". We need this change because
  26534. when we add new auth dirservers, old servers won't know not to
  26535. hang up on them.
  26536. - Let Tor build on Sun CC again.
  26537. - Fix an off-by-one buffer size in dirserv.c that magically never
  26538. hit our three authorities but broke sjmurdoch's own tor network.
  26539. - If we as a directory mirror don't know of any v1 directory
  26540. authorities, then don't try to cache any v1 directories.
  26541. - Stop warning about unknown servers in our family when they are
  26542. given as hex digests.
  26543. - Stop complaining as quickly to the server operator that he
  26544. hasn't registered his nickname/key binding.
  26545. - Various cleanups so we can add new V2 Auth Dirservers.
  26546. - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
  26547. reflect the updated flags in our v2 dir protocol.
  26548. - Resume allowing non-printable characters for exit streams (both
  26549. for connecting and for resolving). Now we tolerate applications
  26550. that don't follow the RFCs. But continue to block malformed names
  26551. at the socks side.
  26552. o Bugfixes on 0.1.0.x:
  26553. - Fix assert bug in close_logs(): when we close and delete logs,
  26554. remove them all from the global "logfiles" list.
  26555. - Fix minor integer overflow in calculating when we expect to use up
  26556. our bandwidth allocation before hibernating.
  26557. - Fix a couple of bugs in OpenSSL detection. Also, deal better when
  26558. there are multiple SSLs installed with different versions.
  26559. - When we try to be a server and Address is not explicitly set and
  26560. our hostname resolves to a private IP address, try to use an
  26561. interface address if it has a public address. Now Windows machines
  26562. that think of themselves as localhost can work by default.
  26563. o New features:
  26564. - Let the controller ask for GETINFO dir/server/foo so it can ask
  26565. directly rather than connecting to the dir port.
  26566. - Let the controller tell us about certain router descriptors
  26567. that it doesn't want Tor to use in circuits. Implement
  26568. SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
  26569. - New config option SafeSocks to reject all application connections
  26570. using unsafe socks protocols. Defaults to off.
  26571. Changes in version 0.1.1.15-rc - 2006-03-11
  26572. o Bugfixes and cleanups:
  26573. - When we're printing strings from the network, don't try to print
  26574. non-printable characters. This protects us against shell escape
  26575. sequence exploits, and also against attacks to fool humans into
  26576. misreading their logs.
  26577. - Fix a bug where Tor would fail to establish any connections if you
  26578. left it off for 24 hours and then started it: we were happy with
  26579. the obsolete network statuses, but they all referred to router
  26580. descriptors that were too old to fetch, so we ended up with no
  26581. valid router descriptors.
  26582. - Fix a seg fault in the controller's "getinfo orconn-status"
  26583. command while listing status on incoming handshaking connections.
  26584. Introduce a status name "NEW" for these connections.
  26585. - If we get a linelist or linelist_s config option from the torrc
  26586. (e.g. ExitPolicy) and it has no value, warn and skip rather than
  26587. silently resetting it to its default.
  26588. - Don't abandon entry guards until they've been down or gone for
  26589. a whole month.
  26590. - Cleaner and quieter log messages.
  26591. o New features:
  26592. - New controller signal NEWNYM that makes new application requests
  26593. use clean circuits.
  26594. - Add a new circuit purpose 'controller' to let the controller ask
  26595. for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
  26596. controller command to let you specify the purpose if you're
  26597. starting a new circuit. Add a new SETCIRCUITPURPOSE controller
  26598. command to let you change a circuit's purpose after it's been
  26599. created.
  26600. - Accept "private:*" in routerdesc exit policies; not generated yet
  26601. because older Tors do not understand it.
  26602. - Add BSD-style contributed startup script "rc.subr" from Peter
  26603. Thoenen.
  26604. Changes in version 0.1.1.14-alpha - 2006-02-20
  26605. o Bugfixes on 0.1.1.x:
  26606. - Don't die if we ask for a stdout or stderr log (even implicitly)
  26607. and we're set to RunAsDaemon -- just warn.
  26608. - We still had a few bugs in the OR connection rotation code that
  26609. caused directory servers to slowly aggregate connections to other
  26610. fast Tor servers. This time for sure!
  26611. - Make log entries on Win32 include the name of the function again.
  26612. - We were treating a pair of exit policies if they were equal even
  26613. if one said accept and the other said reject -- causing us to
  26614. not always publish a new descriptor since we thought nothing
  26615. had changed.
  26616. - Retry pending server downloads as well as pending networkstatus
  26617. downloads when we unexpectedly get a socks request.
  26618. - We were ignoring the IS_FAST flag in the directory status,
  26619. meaning we were willing to pick trivial-bandwidth nodes for "fast"
  26620. connections.
  26621. - If the controller's SAVECONF command fails (e.g. due to file
  26622. permissions), let the controller know that it failed.
  26623. o Features:
  26624. - If we're trying to be a Tor server and running Windows 95/98/ME
  26625. as a server, explain that we'll likely crash.
  26626. - When we're a server, a client asks for an old-style directory,
  26627. and our write bucket is empty, don't give it to him. This way
  26628. small servers can continue to serve the directory *sometimes*,
  26629. without getting overloaded.
  26630. - Compress exit policies even more -- look for duplicate lines
  26631. and remove them.
  26632. - Clients now honor the "guard" flag in the router status when
  26633. picking entry guards, rather than looking at is_fast or is_stable.
  26634. - Retain unrecognized lines in $DATADIR/state file, so that we can
  26635. be forward-compatible.
  26636. - Generate 18.0.0.0/8 address policy format in descs when we can;
  26637. warn when the mask is not reducible to a bit-prefix.
  26638. - Let the user set ControlListenAddress in the torrc. This can be
  26639. dangerous, but there are some cases (like a secured LAN) where it
  26640. makes sense.
  26641. - Split ReachableAddresses into ReachableDirAddresses and
  26642. ReachableORAddresses, so we can restrict Dir conns to port 80
  26643. and OR conns to port 443.
  26644. - Now we can target arch and OS in rpm builds (contributed by
  26645. Phobos). Also make the resulting dist-rpm filename match the
  26646. target arch.
  26647. - New config options to help controllers: FetchServerDescriptors
  26648. and FetchHidServDescriptors for whether to fetch server
  26649. info and hidserv info or let the controller do it, and
  26650. PublishServerDescriptor and PublishHidServDescriptors.
  26651. - Also let the controller set the __AllDirActionsPrivate config
  26652. option if you want all directory fetches/publishes to happen via
  26653. Tor (it assumes your controller bootstraps your circuits).
  26654. Changes in version 0.1.0.17 - 2006-02-17
  26655. o Crash bugfixes on 0.1.0.x:
  26656. - When servers with a non-zero DirPort came out of hibernation,
  26657. sometimes they would trigger an assert.
  26658. o Other important bugfixes:
  26659. - On platforms that don't have getrlimit (like Windows), we were
  26660. artificially constraining ourselves to a max of 1024
  26661. connections. Now just assume that we can handle as many as 15000
  26662. connections. Hopefully this won't cause other problems.
  26663. o Backported features:
  26664. - When we're a server, a client asks for an old-style directory,
  26665. and our write bucket is empty, don't give it to him. This way
  26666. small servers can continue to serve the directory *sometimes*,
  26667. without getting overloaded.
  26668. - Whenever you get a 503 in response to a directory fetch, try
  26669. once more. This will become important once servers start sending
  26670. 503's whenever they feel busy.
  26671. - Fetch a new directory every 120 minutes, not every 40 minutes.
  26672. Now that we have hundreds of thousands of users running the old
  26673. directory algorithm, it's starting to hurt a lot.
  26674. - Bump up the period for forcing a hidden service descriptor upload
  26675. from 20 minutes to 1 hour.
  26676. Changes in version 0.1.1.13-alpha - 2006-02-09
  26677. o Crashes in 0.1.1.x:
  26678. - When you tried to setconf ORPort via the controller, Tor would
  26679. crash. So people using TorCP to become a server were sad.
  26680. - Solve (I hope) the stack-smashing bug that we were seeing on fast
  26681. servers. The problem appears to be something do with OpenSSL's
  26682. random number generation, or how we call it, or something. Let me
  26683. know if the crashes continue.
  26684. - Turn crypto hardware acceleration off by default, until we find
  26685. somebody smart who can test it for us. (It appears to produce
  26686. seg faults in at least some cases.)
  26687. - Fix a rare assert error when we've tried all intro points for
  26688. a hidden service and we try fetching the service descriptor again:
  26689. "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
  26690. o Major fixes:
  26691. - Fix a major load balance bug: we were round-robining in 16 KB
  26692. chunks, and servers with bandwidthrate of 20 KB, while downloading
  26693. a 600 KB directory, would starve their other connections. Now we
  26694. try to be a bit more fair.
  26695. - Dir authorities and mirrors were never expiring the newest
  26696. descriptor for each server, causing memory and directory bloat.
  26697. - Fix memory-bloating and connection-bloating bug on servers: We
  26698. were never closing any connection that had ever had a circuit on
  26699. it, because we were checking conn->n_circuits == 0, yet we had a
  26700. bug that let it go negative.
  26701. - Make Tor work using squid as your http proxy again -- squid
  26702. returns an error if you ask for a URL that's too long, and it uses
  26703. a really generic error message. Plus, many people are behind a
  26704. transparent squid so they don't even realize it.
  26705. - On platforms that don't have getrlimit (like Windows), we were
  26706. artificially constraining ourselves to a max of 1024
  26707. connections. Now just assume that we can handle as many as 15000
  26708. connections. Hopefully this won't cause other problems.
  26709. - Add a new config option ExitPolicyRejectPrivate which defaults to
  26710. 1. This means all exit policies will begin with rejecting private
  26711. addresses, unless the server operator explicitly turns it off.
  26712. o Major features:
  26713. - Clients no longer download descriptors for non-running
  26714. descriptors.
  26715. - Before we add new directory authorities, we should make it
  26716. clear that only v1 authorities should receive/publish hidden
  26717. service descriptors.
  26718. o Minor features:
  26719. - As soon as we've fetched some more directory info, immediately
  26720. try to download more server descriptors. This way we don't have
  26721. a 10 second pause during initial bootstrapping.
  26722. - Remove even more loud log messages that the server operator can't
  26723. do anything about.
  26724. - When we're running an obsolete or un-recommended version, make
  26725. the log message more clear about what the problem is and what
  26726. versions *are* still recommended.
  26727. - Provide a more useful warn message when our onion queue gets full:
  26728. the CPU is too slow or the exit policy is too liberal.
  26729. - Don't warn when we receive a 503 from a dirserver/cache -- this
  26730. will pave the way for them being able to refuse if they're busy.
  26731. - When we fail to bind a listener, try to provide a more useful
  26732. log message: e.g., "Is Tor already running?"
  26733. - Adjust tor-spec to parameterize cell and key lengths. Now Ian
  26734. Goldberg can prove things about our handshake protocol more
  26735. easily.
  26736. - MaxConn has been obsolete for a while now. Document the ConnLimit
  26737. config option, which is a *minimum* number of file descriptors
  26738. that must be available else Tor refuses to start.
  26739. - Apply Matt Ghali's --with-syslog-facility patch to ./configure
  26740. if you log to syslog and want something other than LOG_DAEMON.
  26741. - Make dirservers generate a separate "guard" flag to mean,
  26742. "would make a good entry guard". Make clients parse it and vote
  26743. on it. Not used by clients yet.
  26744. - Implement --with-libevent-dir option to ./configure. Also, improve
  26745. search techniques to find libevent, and use those for openssl too.
  26746. - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
  26747. - Only start testing reachability once we've established a
  26748. circuit. This will make startup on dirservers less noisy.
  26749. - Don't try to upload hidden service descriptors until we have
  26750. established a circuit.
  26751. - Fix the controller's "attachstream 0" command to treat conn like
  26752. it just connected, doing address remapping, handling .exit and
  26753. .onion idioms, and so on. Now we're more uniform in making sure
  26754. that the controller hears about new and closing connections.
  26755. Changes in version 0.1.1.12-alpha - 2006-01-11
  26756. o Bugfixes on 0.1.1.x:
  26757. - The fix to close duplicate server connections was closing all
  26758. Tor client connections if they didn't establish a circuit
  26759. quickly enough. Oops.
  26760. - Fix minor memory issue (double-free) that happened on exit.
  26761. o Bugfixes on 0.1.0.x:
  26762. - Tor didn't warn when it failed to open a log file.
  26763. Changes in version 0.1.1.11-alpha - 2006-01-10
  26764. o Crashes in 0.1.1.x:
  26765. - Include all the assert/crash fixes from 0.1.0.16.
  26766. - If you start Tor and then quit very quickly, there were some
  26767. races that tried to free things that weren't allocated yet.
  26768. - Fix a rare memory stomp if you're running hidden services.
  26769. - Fix segfault when specifying DirServer in config without nickname.
  26770. - Fix a seg fault when you finish connecting to a server but at
  26771. that moment you dump his server descriptor.
  26772. - Extendcircuit and Attachstream controller commands would
  26773. assert/crash if you don't give them enough arguments.
  26774. - Fix an assert error when we're out of space in the connection_list
  26775. and we try to post a hidden service descriptor (reported by weasel).
  26776. - If you specify a relative torrc path and you set RunAsDaemon in
  26777. your torrc, then it chdir()'s to the new directory. If you HUP,
  26778. it tries to load the new torrc location, fails, and exits.
  26779. The fix: no longer allow a relative path to torrc using -f.
  26780. o Major features:
  26781. - Implement "entry guards": automatically choose a handful of entry
  26782. nodes and stick with them for all circuits. Only pick new guards
  26783. when the ones you have are unsuitable, and if the old guards
  26784. become suitable again, switch back. This will increase security
  26785. dramatically against certain end-point attacks. The EntryNodes
  26786. config option now provides some hints about which entry guards you
  26787. want to use most; and StrictEntryNodes means to only use those.
  26788. - New directory logic: download by descriptor digest, not by
  26789. fingerprint. Caches try to download all listed digests from
  26790. authorities; clients try to download "best" digests from caches.
  26791. This avoids partitioning and isolating attacks better.
  26792. - Make the "stable" router flag in network-status be the median of
  26793. the uptimes of running valid servers, and make clients pay
  26794. attention to the network-status flags. Thus the cutoff adapts
  26795. to the stability of the network as a whole, making IRC, IM, etc
  26796. connections more reliable.
  26797. o Major fixes:
  26798. - Tor servers with dynamic IP addresses were needing to wait 18
  26799. hours before they could start doing reachability testing using
  26800. the new IP address and ports. This is because they were using
  26801. the internal descriptor to learn what to test, yet they were only
  26802. rebuilding the descriptor once they decided they were reachable.
  26803. - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
  26804. to download certain server descriptors, throw them away, and then
  26805. fetch them again after 30 minutes. Now mirrors throw away these
  26806. server descriptors so clients can't get them.
  26807. - We were leaving duplicate connections to other ORs open for a week,
  26808. rather than closing them once we detect a duplicate. This only
  26809. really affected authdirservers, but it affected them a lot.
  26810. - Spread the authdirservers' reachability testing over the entire
  26811. testing interval, so we don't try to do 500 TLS's at once every
  26812. 20 minutes.
  26813. o Minor fixes:
  26814. - If the network is down, and we try to connect to a conn because
  26815. we have a circuit in mind, and we timeout (30 seconds) because the
  26816. network never answers, we were expiring the circuit, but we weren't
  26817. obsoleting the connection or telling the entry_guards functions.
  26818. - Some Tor servers process billions of cells per day. These statistics
  26819. need to be uint64_t's.
  26820. - Check for integer overflows in more places, when adding elements
  26821. to smartlists. This could possibly prevent a buffer overflow
  26822. on malicious huge inputs. I don't see any, but I haven't looked
  26823. carefully.
  26824. - ReachableAddresses kept growing new "reject *:*" lines on every
  26825. setconf/reload.
  26826. - When you "setconf log" via the controller, it should remove all
  26827. logs. We were automatically adding back in a "log notice stdout".
  26828. - Newly bootstrapped Tor networks couldn't establish hidden service
  26829. circuits until they had nodes with high uptime. Be more tolerant.
  26830. - We were marking servers down when they could not answer every piece
  26831. of the directory request we sent them. This was far too harsh.
  26832. - Fix the torify (tsocks) config file to not use Tor for localhost
  26833. connections.
  26834. - Directory authorities now go to the proper authority when asking for
  26835. a networkstatus, even when they want a compressed one.
  26836. - Fix a harmless bug that was causing Tor servers to log
  26837. "Got an end because of misc error, but we're not an AP. Closing."
  26838. - Authorities were treating their own descriptor changes as cosmetic,
  26839. meaning the descriptor available in the network-status and the
  26840. descriptor that clients downloaded were different.
  26841. - The OS X installer was adding a symlink for tor_resolve but
  26842. the binary was called tor-resolve (reported by Thomas Hardly).
  26843. - Workaround a problem with some http proxies where they refuse GET
  26844. requests that specify "Content-Length: 0" (reported by Adrian).
  26845. - Fix wrong log message when you add a "HiddenServiceNodes" config
  26846. line without any HiddenServiceDir line (reported by Chris Thomas).
  26847. o Minor features:
  26848. - Write the TorVersion into the state file so we have a prayer of
  26849. keeping forward and backward compatibility.
  26850. - Revive the FascistFirewall config option rather than eliminating it:
  26851. now it's a synonym for ReachableAddresses *:80,*:443.
  26852. - Clients choose directory servers from the network status lists,
  26853. not from their internal list of router descriptors. Now they can
  26854. go to caches directly rather than needing to go to authorities
  26855. to bootstrap.
  26856. - Directory authorities ignore router descriptors that have only
  26857. cosmetic differences: do this for 0.1.0.x servers now too.
  26858. - Add a new flag to network-status indicating whether the server
  26859. can answer v2 directory requests too.
  26860. - Authdirs now stop whining so loudly about bad descriptors that
  26861. they fetch from other dirservers. So when there's a log complaint,
  26862. it's for sure from a freshly uploaded descriptor.
  26863. - Reduce memory requirements in our structs by changing the order
  26864. of fields.
  26865. - There used to be two ways to specify your listening ports in a
  26866. server descriptor: on the "router" line and with a separate "ports"
  26867. line. Remove support for the "ports" line.
  26868. - New config option "AuthDirRejectUnlisted" for auth dirservers as
  26869. a panic button: if we get flooded with unusable servers we can
  26870. revert to only listing servers in the approved-routers file.
  26871. - Auth dir servers can now mark a fingerprint as "!reject" or
  26872. "!invalid" in the approved-routers file (as its nickname), to
  26873. refuse descriptors outright or include them but marked as invalid.
  26874. - Servers store bandwidth history across restarts/crashes.
  26875. - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
  26876. get a better idea of why their circuits failed. Not used yet.
  26877. - Directory mirrors now cache up to 16 unrecognized network-status
  26878. docs. Now we can add new authdirservers and they'll be cached too.
  26879. - When picking a random directory, prefer non-authorities if any
  26880. are known.
  26881. - New controller option "getinfo desc/all-recent" to fetch the
  26882. latest server descriptor for every router that Tor knows about.
  26883. Changes in version 0.1.0.16 - 2006-01-02
  26884. o Crash bugfixes on 0.1.0.x:
  26885. - On Windows, build with a libevent patch from "I-M Weasel" to avoid
  26886. corrupting the heap, losing FDs, or crashing when we need to resize
  26887. the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
  26888. - It turns out sparc64 platforms crash on unaligned memory access
  26889. too -- so detect and avoid this.
  26890. - Handle truncated compressed data correctly (by detecting it and
  26891. giving an error).
  26892. - Fix possible-but-unlikely free(NULL) in control.c.
  26893. - When we were closing connections, there was a rare case that
  26894. stomped on memory, triggering seg faults and asserts.
  26895. - Avoid potential infinite recursion when building a descriptor. (We
  26896. don't know that it ever happened, but better to fix it anyway.)
  26897. - We were neglecting to unlink marked circuits from soon-to-close OR
  26898. connections, which caused some rare scribbling on freed memory.
  26899. - Fix a memory stomping race bug when closing the joining point of two
  26900. rendezvous circuits.
  26901. - Fix an assert in time parsing found by Steven Murdoch.
  26902. o Other bugfixes on 0.1.0.x:
  26903. - When we're doing reachability testing, provide more useful log
  26904. messages so the operator knows what to expect.
  26905. - Do not check whether DirPort is reachable when we are suppressing
  26906. advertising it because of hibernation.
  26907. - When building with -static or on Solaris, we sometimes needed -ldl.
  26908. - When we're deciding whether a stream has enough circuits around
  26909. that can handle it, count the freshly dirty ones and not the ones
  26910. that are so dirty they won't be able to handle it.
  26911. - When we're expiring old circuits, we had a logic error that caused
  26912. us to close new rendezvous circuits rather than old ones.
  26913. - Give a more helpful log message when you try to change ORPort via
  26914. the controller: you should upgrade Tor if you want that to work.
  26915. - We were failing to parse Tor versions that start with "Tor ".
  26916. - Tolerate faulty streams better: when a stream fails for reason
  26917. exitpolicy, stop assuming that the router is lying about his exit
  26918. policy. When a stream fails for reason misc, allow it to retry just
  26919. as if it was resolvefailed. When a stream has failed three times,
  26920. reset its failure count so we can try again and get all three tries.
  26921. Changes in version 0.1.1.10-alpha - 2005-12-11
  26922. o Correctness bugfixes on 0.1.0.x:
  26923. - On Windows, build with a libevent patch from "I-M Weasel" to avoid
  26924. corrupting the heap, losing FDs, or crashing when we need to resize
  26925. the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
  26926. - Stop doing the complex voodoo overkill checking for insecure
  26927. Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
  26928. - When we were closing connections, there was a rare case that
  26929. stomped on memory, triggering seg faults and asserts.
  26930. - We were neglecting to unlink marked circuits from soon-to-close OR
  26931. connections, which caused some rare scribbling on freed memory.
  26932. - When we're deciding whether a stream has enough circuits around
  26933. that can handle it, count the freshly dirty ones and not the ones
  26934. that are so dirty they won't be able to handle it.
  26935. - Recover better from TCP connections to Tor servers that are
  26936. broken but don't tell you (it happens!); and rotate TLS
  26937. connections once a week.
  26938. - When we're expiring old circuits, we had a logic error that caused
  26939. us to close new rendezvous circuits rather than old ones.
  26940. - Fix a scary-looking but apparently harmless bug where circuits
  26941. would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
  26942. servers, and never switch to state CIRCUIT_STATE_OPEN.
  26943. - When building with -static or on Solaris, we sometimes needed to
  26944. build with -ldl.
  26945. - Give a useful message when people run Tor as the wrong user,
  26946. rather than telling them to start chowning random directories.
  26947. - We were failing to inform the controller about new .onion streams.
  26948. o Security bugfixes on 0.1.0.x:
  26949. - Refuse server descriptors if the fingerprint line doesn't match
  26950. the included identity key. Tor doesn't care, but other apps (and
  26951. humans) might actually be trusting the fingerprint line.
  26952. - We used to kill the circuit when we receive a relay command we
  26953. don't recognize. Now we just drop it.
  26954. - Start obeying our firewall options more rigorously:
  26955. . If we can't get to a dirserver directly, try going via Tor.
  26956. . Don't ever try to connect (as a client) to a place our
  26957. firewall options forbid.
  26958. . If we specify a proxy and also firewall options, obey the
  26959. firewall options even when we're using the proxy: some proxies
  26960. can only proxy to certain destinations.
  26961. - Fix a bug found by Lasse Overlier: when we were making internal
  26962. circuits (intended to be cannibalized later for rendezvous and
  26963. introduction circuits), we were picking them so that they had
  26964. useful exit nodes. There was no need for this, and it actually
  26965. aids some statistical attacks.
  26966. - Start treating internal circuits and exit circuits separately.
  26967. It's important to keep them separate because internal circuits
  26968. have their last hops picked like middle hops, rather than like
  26969. exit hops. So exiting on them will break the user's expectations.
  26970. o Bugfixes on 0.1.1.x:
  26971. - Take out the mis-feature where we tried to detect IP address
  26972. flapping for people with DynDNS, and chose not to upload a new
  26973. server descriptor sometimes.
  26974. - Try to be compatible with OpenSSL 0.9.6 again.
  26975. - Log fix: when the controller is logging about .onion addresses,
  26976. sometimes it didn't include the ".onion" part of the address.
  26977. - Don't try to modify options->DirServers internally -- if the
  26978. user didn't specify any, just add the default ones directly to
  26979. the trusted dirserver list. This fixes a bug where people running
  26980. controllers would use SETCONF on some totally unrelated config
  26981. option, and Tor would start yelling at them about changing their
  26982. DirServer lines.
  26983. - Let the controller's redirectstream command specify a port, in
  26984. case the controller wants to change that too.
  26985. - When we requested a pile of server descriptors, we sometimes
  26986. accidentally launched a duplicate request for the first one.
  26987. - Bugfix for trackhostexits: write down the fingerprint of the
  26988. chosen exit, not its nickname, because the chosen exit might not
  26989. be verified.
  26990. - When parsing foo.exit, if foo is unknown, and we are leaving
  26991. circuits unattached, set the chosen_exit field and leave the
  26992. address empty. This matters because controllers got confused
  26993. otherwise.
  26994. - Directory authorities no longer try to download server
  26995. descriptors that they know they will reject.
  26996. o Features and updates:
  26997. - Replace balanced trees with hash tables: this should make stuff
  26998. significantly faster.
  26999. - Resume using the AES counter-mode implementation that we ship,
  27000. rather than OpenSSL's. Ours is significantly faster.
  27001. - Many other CPU and memory improvements.
  27002. - Add a new config option FastFirstHopPK (on by default) so clients
  27003. do a trivial crypto handshake for their first hop, since TLS has
  27004. already taken care of confidentiality and authentication.
  27005. - Add a new config option TestSocks so people can see if their
  27006. applications are using socks4, socks4a, socks5-with-ip, or
  27007. socks5-with-hostname. This way they don't have to keep mucking
  27008. with tcpdump and wondering if something got cached somewhere.
  27009. - Warn when listening on a public address for socks. I suspect a
  27010. lot of people are setting themselves up as open socks proxies,
  27011. and they have no idea that jerks on the Internet are using them,
  27012. since they simply proxy the traffic into the Tor network.
  27013. - Add "private:*" as an alias in configuration for policies. Now
  27014. you can simplify your exit policy rather than needing to list
  27015. every single internal or nonroutable network space.
  27016. - Add a new controller event type that allows controllers to get
  27017. all server descriptors that were uploaded to a router in its role
  27018. as authoritative dirserver.
  27019. - Start shipping socks-extensions.txt, tor-doc-unix.html,
  27020. tor-doc-server.html, and stylesheet.css in the tarball.
  27021. - Stop shipping tor-doc.html in the tarball.
  27022. Changes in version 0.1.1.9-alpha - 2005-11-15
  27023. o Usability improvements:
  27024. - Start calling it FooListenAddress rather than FooBindAddress,
  27025. since few of our users know what it means to bind an address
  27026. or port.
  27027. - Reduce clutter in server logs. We're going to try to make
  27028. them actually usable now. New config option ProtocolWarnings that
  27029. lets you hear about how _other Tors_ are breaking the protocol. Off
  27030. by default.
  27031. - Divide log messages into logging domains. Once we put some sort
  27032. of interface on this, it will let people looking at more verbose
  27033. log levels specify the topics they want to hear more about.
  27034. - Make directory servers return better http 404 error messages
  27035. instead of a generic "Servers unavailable".
  27036. - Check for even more Windows version flags when writing the platform
  27037. string in server descriptors, and note any we don't recognize.
  27038. - Clean up more of the OpenSSL memory when exiting, so we can detect
  27039. memory leaks better.
  27040. - Make directory authorities be non-versioning, non-naming by
  27041. default. Now we can add new directory servers without requiring
  27042. their operators to pay close attention.
  27043. - When logging via syslog, include the pid whenever we provide
  27044. a log entry. Suggested by Todd Fries.
  27045. o Performance improvements:
  27046. - Directory servers now silently throw away new descriptors that
  27047. haven't changed much if the timestamps are similar. We do this to
  27048. tolerate older Tor servers that upload a new descriptor every 15
  27049. minutes. (It seemed like a good idea at the time.)
  27050. - Inline bottleneck smartlist functions; use fast versions by default.
  27051. - Add a "Map from digest to void*" abstraction digestmap_t so we
  27052. can do less hex encoding/decoding. Use it in router_get_by_digest()
  27053. to resolve a performance bottleneck.
  27054. - Allow tor_gzip_uncompress to extract as much as possible from
  27055. truncated compressed data. Try to extract as many
  27056. descriptors as possible from truncated http responses (when
  27057. DIR_PURPOSE_FETCH_ROUTERDESC).
  27058. - Make circ->onionskin a pointer, not a static array. moria2 was using
  27059. 125000 circuit_t's after it had been up for a few weeks, which
  27060. translates to 20+ megs of wasted space.
  27061. - The private half of our EDH handshake keys are now chosen out
  27062. of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
  27063. o Security improvements:
  27064. - Start making directory caches retain old routerinfos, so soon
  27065. clients can start asking by digest of descriptor rather than by
  27066. fingerprint of server.
  27067. - Add half our entropy from RAND_poll in OpenSSL. This knows how
  27068. to use egd (if present), openbsd weirdness (if present), vms/os2
  27069. weirdness (if we ever port there), and more in the future.
  27070. o Bugfixes on 0.1.0.x:
  27071. - Do round-robin writes of at most 16 kB per write. This might be
  27072. more fair on loaded Tor servers, and it might resolve our Windows
  27073. crash bug. It might also slow things down.
  27074. - Our TLS handshakes were generating a single public/private
  27075. keypair for the TLS context, rather than making a new one for
  27076. each new connections. Oops. (But we were still rotating them
  27077. periodically, so it's not so bad.)
  27078. - When we were cannibalizing a circuit with a particular exit
  27079. node in mind, we weren't checking to see if that exit node was
  27080. already present earlier in the circuit. Oops.
  27081. - When a Tor server's IP changes (e.g. from a dyndns address),
  27082. upload a new descriptor so clients will learn too.
  27083. - Really busy servers were keeping enough circuits open on stable
  27084. connections that they were wrapping around the circuit_id
  27085. space. (It's only two bytes.) This exposed a bug where we would
  27086. feel free to reuse a circuit_id even if it still exists but has
  27087. been marked for close. Try to fix this bug. Some bug remains.
  27088. - If we would close a stream early (e.g. it asks for a .exit that
  27089. we know would refuse it) but the LeaveStreamsUnattached config
  27090. option is set by the controller, then don't close it.
  27091. o Bugfixes on 0.1.1.8-alpha:
  27092. - Fix a big pile of memory leaks, some of them serious.
  27093. - Do not try to download a routerdesc if we would immediately reject
  27094. it as obsolete.
  27095. - Resume inserting a newline between all router descriptors when
  27096. generating (old style) signed directories, since our spec says
  27097. we do.
  27098. - When providing content-type application/octet-stream for
  27099. server descriptors using .z, we were leaving out the
  27100. content-encoding header. Oops. (Everything tolerated this just
  27101. fine, but that doesn't mean we need to be part of the problem.)
  27102. - Fix a potential seg fault in getconf and getinfo using version 1
  27103. of the controller protocol.
  27104. - Avoid crash: do not check whether DirPort is reachable when we
  27105. are suppressing it because of hibernation.
  27106. - Make --hash-password not crash on exit.
  27107. Changes in version 0.1.1.8-alpha - 2005-10-07
  27108. o New features (major):
  27109. - Clients don't download or use the directory anymore. Now they
  27110. download and use network-statuses from the trusted dirservers,
  27111. and fetch individual server descriptors as needed from mirrors.
  27112. See dir-spec.txt for all the gory details.
  27113. - Be more conservative about whether to advertise our DirPort.
  27114. The main change is to not advertise if we're running at capacity
  27115. and either a) we could hibernate or b) our capacity is low and
  27116. we're using a default DirPort.
  27117. - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
  27118. o New features (minor):
  27119. - Try to be smart about when to retry network-status and
  27120. server-descriptor fetches. Still needs some tuning.
  27121. - Stop parsing, storing, or using running-routers output (but
  27122. mirrors still cache and serve it).
  27123. - Consider a threshold of versioning dirservers (dirservers who have
  27124. an opinion about which Tor versions are still recommended) before
  27125. deciding whether to warn the user that he's obsolete.
  27126. - Dirservers can now reject/invalidate by key and IP, with the
  27127. config options "AuthDirInvalid" and "AuthDirReject". This is
  27128. useful since currently we automatically list servers as running
  27129. and usable even if we know they're jerks.
  27130. - Provide dire warnings to any users who set DirServer; move it out
  27131. of torrc.sample and into torrc.complete.
  27132. - Add MyFamily to torrc.sample in the server section.
  27133. - Add nicknames to the DirServer line, so we can refer to them
  27134. without requiring all our users to memorize their IP addresses.
  27135. - When we get an EOF or a timeout on a directory connection, note
  27136. how many bytes of serverdesc we are dropping. This will help
  27137. us determine whether it is smart to parse incomplete serverdesc
  27138. responses.
  27139. - Add a new function to "change pseudonyms" -- that is, to stop
  27140. using any currently-dirty circuits for new streams, so we don't
  27141. link new actions to old actions. Currently it's only called on
  27142. HUP (or SIGNAL RELOAD).
  27143. - On sighup, if UseHelperNodes changed to 1, use new circuits.
  27144. - Start using RAND_bytes rather than RAND_pseudo_bytes from
  27145. OpenSSL. Also, reseed our entropy every hour, not just at
  27146. startup. And entropy in 512-bit chunks, not 160-bit chunks.
  27147. o Fixes on 0.1.1.7-alpha:
  27148. - Nobody ever implemented EVENT_ADDRMAP for control protocol
  27149. version 0, so don't let version 0 controllers ask for it.
  27150. - If you requested something with too many newlines via the
  27151. v1 controller protocol, you could crash tor.
  27152. - Fix a number of memory leaks, including some pretty serious ones.
  27153. - Re-enable DirPort testing again, so Tor servers will be willing
  27154. to advertise their DirPort if it's reachable.
  27155. - On TLS handshake, only check the other router's nickname against
  27156. its expected nickname if is_named is set.
  27157. o Fixes forward-ported from 0.1.0.15:
  27158. - Don't crash when we don't have any spare file descriptors and we
  27159. try to spawn a dns or cpu worker.
  27160. - Make the numbers in read-history and write-history into uint64s,
  27161. so they don't overflow and publish negatives in the descriptor.
  27162. o Fixes on 0.1.0.x:
  27163. - For the OS X package's modified privoxy config file, comment
  27164. out the "logfile" line so we don't log everything passed
  27165. through privoxy.
  27166. - We were whining about using socks4 or socks5-with-local-lookup
  27167. even when it's an IP in the "virtual" range we designed exactly
  27168. for this case.
  27169. - We were leaking some memory every time the client changes IPs.
  27170. - Never call free() on tor_malloc()d memory. This will help us
  27171. use dmalloc to detect memory leaks.
  27172. - Check for named servers when looking them up by nickname;
  27173. warn when we'recalling a non-named server by its nickname;
  27174. don't warn twice about the same name.
  27175. - Try to list MyFamily elements by key, not by nickname, and warn
  27176. if we've not heard of the server.
  27177. - Make windows platform detection (uname equivalent) smarter.
  27178. - It turns out sparc64 doesn't like unaligned access either.
  27179. Changes in version 0.1.0.15 - 2005-09-23
  27180. o Bugfixes on 0.1.0.x:
  27181. - Reject ports 465 and 587 (spam targets) in default exit policy.
  27182. - Don't crash when we don't have any spare file descriptors and we
  27183. try to spawn a dns or cpu worker.
  27184. - Get rid of IgnoreVersion undocumented config option, and make us
  27185. only warn, never exit, when we're running an obsolete version.
  27186. - Don't try to print a null string when your server finds itself to
  27187. be unreachable and the Address config option is empty.
  27188. - Make the numbers in read-history and write-history into uint64s,
  27189. so they don't overflow and publish negatives in the descriptor.
  27190. - Fix a minor memory leak in smartlist_string_remove().
  27191. - We were only allowing ourselves to upload a server descriptor at
  27192. most every 20 minutes, even if it changed earlier than that.
  27193. - Clean up log entries that pointed to old URLs.
  27194. Changes in version 0.1.1.7-alpha - 2005-09-14
  27195. o Fixes on 0.1.1.6-alpha:
  27196. - Exit servers were crashing when people asked them to make a
  27197. connection to an address not in their exit policy.
  27198. - Looking up a non-existent stream for a v1 control connection would
  27199. cause a segfault.
  27200. - Fix a seg fault if we ask a dirserver for a descriptor by
  27201. fingerprint but he doesn't know about him.
  27202. - SETCONF was appending items to linelists, not clearing them.
  27203. - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
  27204. out and refuse the setconf if it would fail.
  27205. - Downgrade the dirserver log messages when whining about
  27206. unreachability.
  27207. o New features:
  27208. - Add Peter Palfrader's check-tor script to tor/contrib/
  27209. It lets you easily check whether a given server (referenced by
  27210. nickname) is reachable by you.
  27211. - Numerous changes to move towards client-side v2 directories. Not
  27212. enabled yet.
  27213. o Fixes on 0.1.0.x:
  27214. - If the user gave tor an odd number of command-line arguments,
  27215. we were silently ignoring the last one. Now we complain and fail.
  27216. [This wins the oldest-bug prize -- this bug has been present since
  27217. November 2002, as released in Tor 0.0.0.]
  27218. - Do not use unaligned memory access on alpha, mips, or mipsel.
  27219. It *works*, but is very slow, so we treat them as if it doesn't.
  27220. - Retry directory requests if we fail to get an answer we like
  27221. from a given dirserver (we were retrying before, but only if
  27222. we fail to connect).
  27223. - When writing the RecommendedVersions line, sort them first.
  27224. - When the client asked for a rendezvous port that the hidden
  27225. service didn't want to provide, we were sending an IP address
  27226. back along with the end cell. Fortunately, it was zero. But stop
  27227. that anyway.
  27228. - Correct "your server is reachable" log entries to indicate that
  27229. it was self-testing that told us so.
  27230. Changes in version 0.1.1.6-alpha - 2005-09-09
  27231. o Fixes on 0.1.1.5-alpha:
  27232. - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
  27233. - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
  27234. - Fix bug with tor_memmem finding a match at the end of the string.
  27235. - Make unit tests run without segfaulting.
  27236. - Resolve some solaris x86 compile warnings.
  27237. - Handle duplicate lines in approved-routers files without warning.
  27238. - Fix bug where as soon as a server refused any requests due to his
  27239. exit policy (e.g. when we ask for localhost and he tells us that's
  27240. 127.0.0.1 and he won't do it), we decided he wasn't obeying his
  27241. exit policy using him for any exits.
  27242. - Only do openssl hardware accelerator stuff if openssl version is
  27243. at least 0.9.7.
  27244. o New controller features/fixes:
  27245. - Add a "RESETCONF" command so you can set config options like
  27246. AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
  27247. a config option in the torrc with no value, then it clears it
  27248. entirely (rather than setting it to its default).
  27249. - Add a "GETINFO config-file" to tell us where torrc is.
  27250. - Avoid sending blank lines when GETINFO replies should be empty.
  27251. - Add a QUIT command for the controller (for using it manually).
  27252. - Fix a bug in SAVECONF that was adding default dirservers and
  27253. other redundant entries to the torrc file.
  27254. o Start on the new directory design:
  27255. - Generate, publish, cache, serve new network-status format.
  27256. - Publish individual descriptors (by fingerprint, by "all", and by
  27257. "tell me yours").
  27258. - Publish client and server recommended versions separately.
  27259. - Allow tor_gzip_uncompress() to handle multiple concatenated
  27260. compressed strings. Serve compressed groups of router
  27261. descriptors. The compression logic here could be more
  27262. memory-efficient.
  27263. - Distinguish v1 authorities (all currently trusted directories)
  27264. from v2 authorities (all trusted directories).
  27265. - Change DirServers config line to note which dirs are v1 authorities.
  27266. - Add configuration option "V1AuthoritativeDirectory 1" which
  27267. moria1, moria2, and tor26 should set.
  27268. - Remove option when getting directory cache to see whether they
  27269. support running-routers; they all do now. Replace it with one
  27270. to see whether caches support v2 stuff.
  27271. o New features:
  27272. - Dirservers now do their own external reachability testing of each
  27273. Tor server, and only list them as running if they've been found to
  27274. be reachable. We also send back warnings to the server's logs if
  27275. it uploads a descriptor that we already believe is unreachable.
  27276. - Implement exit enclaves: if we know an IP address for the
  27277. destination, and there's a running Tor server at that address
  27278. which allows exit to the destination, then extend the circuit to
  27279. that exit first. This provides end-to-end encryption and end-to-end
  27280. authentication. Also, if the user wants a .exit address or enclave,
  27281. use 4 hops rather than 3, and cannibalize a general circ for it
  27282. if you can.
  27283. - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
  27284. controller. Also, rotate dns and cpu workers if the controller
  27285. changes options that will affect them; and initialize the dns
  27286. worker cache tree whether or not we start out as a server.
  27287. - Only upload a new server descriptor when options change, 18
  27288. hours have passed, uptime is reset, or bandwidth changes a lot.
  27289. - Check [X-]Forwarded-For headers in HTTP requests when generating
  27290. log messages. This lets people run dirservers (and caches) behind
  27291. Apache but still know which IP addresses are causing warnings.
  27292. o Config option changes:
  27293. - Replace (Fascist)Firewall* config options with a new
  27294. ReachableAddresses option that understands address policies.
  27295. For example, "ReachableAddresses *:80,*:443"
  27296. - Get rid of IgnoreVersion undocumented config option, and make us
  27297. only warn, never exit, when we're running an obsolete version.
  27298. - Make MonthlyAccountingStart config option truly obsolete now.
  27299. o Fixes on 0.1.0.x:
  27300. - Reject ports 465 and 587 in the default exit policy, since
  27301. people have started using them for spam too.
  27302. - It turns out we couldn't bootstrap a network since we added
  27303. reachability detection in 0.1.0.1-rc. Good thing the Tor network
  27304. has never gone down. Add an AssumeReachable config option to let
  27305. servers and dirservers bootstrap. When we're trying to build a
  27306. high-uptime or high-bandwidth circuit but there aren't enough
  27307. suitable servers, try being less picky rather than simply failing.
  27308. - Our logic to decide if the OR we connected to was the right guy
  27309. was brittle and maybe open to a mitm for unverified routers.
  27310. - We weren't cannibalizing circuits correctly for
  27311. CIRCUIT_PURPOSE_C_ESTABLISH_REND and
  27312. CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
  27313. build those from scratch. This should make hidden services faster.
  27314. - Predict required circuits better, with an eye toward making hidden
  27315. services faster on the service end.
  27316. - Retry streams if the exit node sends back a 'misc' failure. This
  27317. should result in fewer random failures. Also, after failing
  27318. from resolve failed or misc, reset the num failures, so we give
  27319. it a fair shake next time we try.
  27320. - Clean up the rendezvous warn log msgs, and downgrade some to info.
  27321. - Reduce severity on logs about dns worker spawning and culling.
  27322. - When we're shutting down and we do something like try to post a
  27323. server descriptor or rendezvous descriptor, don't complain that
  27324. we seem to be unreachable. Of course we are, we're shutting down.
  27325. - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
  27326. We don't use them yet, but maybe one day our DNS resolver will be
  27327. able to discover them.
  27328. - Make ContactInfo mandatory for authoritative directory servers.
  27329. - Require server descriptors to list IPv4 addresses -- hostnames
  27330. are no longer allowed. This also fixes some potential security
  27331. problems with people providing hostnames as their address and then
  27332. preferentially resolving them to partition users.
  27333. - Change log line for unreachability to explicitly suggest /etc/hosts
  27334. as the culprit. Also make it clearer what IP address and ports we're
  27335. testing for reachability.
  27336. - Put quotes around user-supplied strings when logging so users are
  27337. more likely to realize if they add bad characters (like quotes)
  27338. to the torrc.
  27339. - Let auth dir servers start without specifying an Address config
  27340. option.
  27341. - Make unit tests (and other invocations that aren't the real Tor)
  27342. run without launching listeners, creating subdirectories, and so on.
  27343. Changes in version 0.1.1.5-alpha - 2005-08-08
  27344. o Bugfixes included in 0.1.0.14.
  27345. o Bugfixes on 0.1.0.x:
  27346. - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
  27347. torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
  27348. it would silently using ignore the 6668.
  27349. Changes in version 0.1.0.14 - 2005-08-08
  27350. o Bugfixes on 0.1.0.x:
  27351. - Fix the other half of the bug with crypto handshakes
  27352. (CVE-2005-2643).
  27353. - Fix an assert trigger if you send a 'signal term' via the
  27354. controller when it's listening for 'event info' messages.
  27355. Changes in version 0.1.1.4-alpha - 2005-08-04
  27356. o Bugfixes included in 0.1.0.13.
  27357. o Features:
  27358. - Improve tor_gettimeofday() granularity on windows.
  27359. - Make clients regenerate their keys when their IP address changes.
  27360. - Implement some more GETINFO goodness: expose helper nodes, config
  27361. options, getinfo keys.
  27362. Changes in version 0.1.0.13 - 2005-08-04
  27363. o Bugfixes on 0.1.0.x:
  27364. - Fix a critical bug in the security of our crypto handshakes.
  27365. - Fix a size_t underflow in smartlist_join_strings2() that made
  27366. it do bad things when you hand it an empty smartlist.
  27367. - Fix Windows installer to ship Tor license (thanks to Aphex for
  27368. pointing out this oversight) and put a link to the doc directory
  27369. in the start menu.
  27370. - Explicitly set no-unaligned-access for sparc: it turns out the
  27371. new gcc's let you compile broken code, but that doesn't make it
  27372. not-broken.
  27373. Changes in version 0.1.1.3-alpha - 2005-07-23
  27374. o Bugfixes on 0.1.1.2-alpha:
  27375. - Fix a bug in handling the controller's "post descriptor"
  27376. function.
  27377. - Fix several bugs in handling the controller's "extend circuit"
  27378. function.
  27379. - Fix a bug in handling the controller's "stream status" event.
  27380. - Fix an assert failure if we have a controller listening for
  27381. circuit events and we go offline.
  27382. - Re-allow hidden service descriptors to publish 0 intro points.
  27383. - Fix a crash when generating your hidden service descriptor if
  27384. you don't have enough intro points already.
  27385. o New features on 0.1.1.2-alpha:
  27386. - New controller function "getinfo accounting", to ask how
  27387. many bytes we've used in this time period.
  27388. - Experimental support for helper nodes: a lot of the risk from
  27389. a small static adversary comes because users pick new random
  27390. nodes every time they rebuild a circuit. Now users will try to
  27391. stick to the same small set of entry nodes if they can. Not
  27392. enabled by default yet.
  27393. o Bugfixes on 0.1.0.12:
  27394. - If you're an auth dir server, always publish your dirport,
  27395. even if you haven't yet found yourself to be reachable.
  27396. - Fix a size_t underflow in smartlist_join_strings2() that made
  27397. it do bad things when you hand it an empty smartlist.
  27398. Changes in version 0.1.0.12 - 2005-07-18
  27399. o New directory servers:
  27400. - tor26 has changed IP address.
  27401. o Bugfixes on 0.1.0.x:
  27402. - Fix a possible double-free in tor_gzip_uncompress().
  27403. - When --disable-threads is set, do not search for or link against
  27404. pthreads libraries.
  27405. - Don't trigger an assert if an authoritative directory server
  27406. claims its dirport is 0.
  27407. - Fix bug with removing Tor as an NT service: some people were
  27408. getting "The service did not return an error." Thanks to Matt
  27409. Edman for the fix.
  27410. Changes in version 0.1.1.2-alpha - 2005-07-15
  27411. o New directory servers:
  27412. - tor26 has changed IP address.
  27413. o Bugfixes on 0.1.0.x, crashes/leaks:
  27414. - Port the servers-not-obeying-their-exit-policies fix from
  27415. 0.1.0.11.
  27416. - Fix an fd leak in start_daemon().
  27417. - On Windows, you can't always reopen a port right after you've
  27418. closed it. So change retry_listeners() to only close and re-open
  27419. ports that have changed.
  27420. - Fix a possible double-free in tor_gzip_uncompress().
  27421. o Bugfixes on 0.1.0.x, usability:
  27422. - When tor_socketpair() fails in Windows, give a reasonable
  27423. Windows-style errno back.
  27424. - Let people type "tor --install" as well as "tor -install" when
  27425. they
  27426. want to make it an NT service.
  27427. - NT service patch from Matt Edman to improve error messages.
  27428. - When the controller asks for a config option with an abbreviated
  27429. name, give the full name in our response.
  27430. - Correct the man page entry on TrackHostExitsExpire.
  27431. - Looks like we were never delivering deflated (i.e. compressed)
  27432. running-routers lists, even when asked. Oops.
  27433. - When --disable-threads is set, do not search for or link against
  27434. pthreads libraries.
  27435. o Bugfixes on 0.1.1.x:
  27436. - Fix a seg fault with autodetecting which controller version is
  27437. being used.
  27438. o Features:
  27439. - New hidden service descriptor format: put a version in it, and
  27440. let people specify introduction/rendezvous points that aren't
  27441. in "the directory" (which is subjective anyway).
  27442. - Allow the DEBUG controller event to work again. Mark certain log
  27443. entries as "don't tell this to controllers", so we avoid cycles.
  27444. Changes in version 0.1.0.11 - 2005-06-30
  27445. o Bugfixes on 0.1.0.x:
  27446. - Fix major security bug: servers were disregarding their
  27447. exit policies if clients behaved unexpectedly.
  27448. - Make OS X init script check for missing argument, so we don't
  27449. confuse users who invoke it incorrectly.
  27450. - Fix a seg fault in "tor --hash-password foo".
  27451. - The MAPADDRESS control command was broken.
  27452. Changes in version 0.1.1.1-alpha - 2005-06-29
  27453. o Bugfixes:
  27454. - Make OS X init script check for missing argument, so we don't
  27455. confuse users who invoke it incorrectly.
  27456. - Fix a seg fault in "tor --hash-password foo".
  27457. - Fix a possible way to DoS dirservers.
  27458. - When we complain that your exit policy implicitly allows local or
  27459. private address spaces, name them explicitly so operators can
  27460. fix it.
  27461. - Make the log message less scary when all the dirservers are
  27462. temporarily unreachable.
  27463. - We were printing the number of idle dns workers incorrectly when
  27464. culling them.
  27465. o Features:
  27466. - Revised controller protocol (version 1) that uses ascii rather
  27467. than binary. Add supporting libraries in python and java so you
  27468. can use the controller from your applications without caring how
  27469. our protocol works.
  27470. - Spiffy new support for crypto hardware accelerators. Can somebody
  27471. test this?
  27472. Changes in version 0.0.9.10 - 2005-06-16
  27473. o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
  27474. - Refuse relay cells that claim to have a length larger than the
  27475. maximum allowed. This prevents a potential attack that could read
  27476. arbitrary memory (e.g. keys) from an exit server's process
  27477. (CVE-2005-2050).
  27478. Changes in version 0.1.0.10 - 2005-06-14
  27479. o Allow a few EINVALs from libevent before dying. Warn on kqueue with
  27480. libevent before 1.1a.
  27481. Changes in version 0.1.0.9-rc - 2005-06-09
  27482. o Bugfixes:
  27483. - Reset buf->highwater every time buf_shrink() is called, not just on
  27484. a successful shrink. This was causing significant memory bloat.
  27485. - Fix buffer overflow when checking hashed passwords.
  27486. - Security fix: if seeding the RNG on Win32 fails, quit.
  27487. - Allow seeding the RNG on Win32 even when you're not running as
  27488. Administrator.
  27489. - Disable threading on Solaris too. Something is wonky with it,
  27490. cpuworkers, and reentrant libs.
  27491. - Reenable the part of the code that tries to flush as soon as an
  27492. OR outbuf has a full TLS record available. Perhaps this will make
  27493. OR outbufs not grow as huge except in rare cases, thus saving lots
  27494. of CPU time plus memory.
  27495. - Reject malformed .onion addresses rather then passing them on as
  27496. normal web requests.
  27497. - Adapt patch from Adam Langley: fix possible memory leak in
  27498. tor_lookup_hostname().
  27499. - Initialize libevent later in the startup process, so the logs are
  27500. already established by the time we start logging libevent warns.
  27501. - Use correct errno on win32 if libevent fails.
  27502. - Check and warn about known-bad/slow libevent versions.
  27503. - Pay more attention to the ClientOnly config option.
  27504. - Have torctl.in/tor.sh.in check for location of su binary (needed
  27505. on FreeBSD)
  27506. - Correct/add man page entries for LongLivedPorts, ExitPolicy,
  27507. KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
  27508. HttpProxyAuthenticator
  27509. - Stop warning about sigpipes in the logs. We're going to
  27510. pretend that getting these occasionally is normal and fine.
  27511. - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
  27512. certain
  27513. installer screens; and don't put stuff into StartupItems unless
  27514. the user asks you to.
  27515. - Require servers that use the default dirservers to have public IP
  27516. addresses. We have too many servers that are configured with private
  27517. IPs and their admins never notice the log entries complaining that
  27518. their descriptors are being rejected.
  27519. - Add OSX uninstall instructions. An actual uninstall script will
  27520. come later.
  27521. Changes in version 0.1.0.8-rc - 2005-05-23
  27522. o Bugfixes:
  27523. - It turns out that kqueue on OS X 10.3.9 was causing kernel
  27524. panics. Disable kqueue on all OS X Tors.
  27525. - Fix RPM: remove duplicate line accidentally added to the rpm
  27526. spec file.
  27527. - Disable threads on openbsd too, since its gethostaddr is not
  27528. reentrant either.
  27529. - Tolerate libevent 0.8 since it still works, even though it's
  27530. ancient.
  27531. - Enable building on Red Hat 9.0 again.
  27532. - Allow the middle hop of the testing circuit to be running any
  27533. version, now that most of them have the bugfix to let them connect
  27534. to unknown servers. This will allow reachability testing to work
  27535. even when 0.0.9.7-0.0.9.9 become obsolete.
  27536. - Handle relay cells with rh.length too large. This prevents
  27537. a potential attack that could read arbitrary memory (maybe even
  27538. keys) from the exit server's process.
  27539. - We screwed up the dirport reachability testing when we don't yet
  27540. have a cached version of the directory. Hopefully now fixed.
  27541. - Clean up router_load_single_router() (used by the controller),
  27542. so it doesn't seg fault on error.
  27543. - Fix a minor memory leak when somebody establishes an introduction
  27544. point at your Tor server.
  27545. - If a socks connection ends because read fails, don't warn that
  27546. you're not sending a socks reply back.
  27547. o Features:
  27548. - Add HttpProxyAuthenticator config option too, that works like
  27549. the HttpsProxyAuthenticator config option.
  27550. - Encode hashed controller passwords in hex instead of base64,
  27551. to make it easier to write controllers.
  27552. Changes in version 0.1.0.7-rc - 2005-05-17
  27553. o Bugfixes:
  27554. - Fix a bug in the OS X package installer that prevented it from
  27555. installing on Tiger.
  27556. - Fix a script bug in the OS X package installer that made it
  27557. complain during installation.
  27558. - Find libevent even if it's hiding in /usr/local/ and your
  27559. CFLAGS and LDFLAGS don't tell you to look there.
  27560. - Be able to link with libevent as a shared library (the default
  27561. after 1.0d), even if it's hiding in /usr/local/lib and even
  27562. if you haven't added /usr/local/lib to your /etc/ld.so.conf,
  27563. assuming you're running gcc. Otherwise fail and give a useful
  27564. error message.
  27565. - Fix a bug in the RPM packager: set home directory for _tor to
  27566. something more reasonable when first installing.
  27567. - Free a minor amount of memory that is still reachable on exit.
  27568. Changes in version 0.1.0.6-rc - 2005-05-14
  27569. o Bugfixes:
  27570. - Implement --disable-threads configure option. Disable threads on
  27571. netbsd by default, because it appears to have no reentrant resolver
  27572. functions.
  27573. - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
  27574. release (1.1) detects and disables kqueue if it's broken.
  27575. - Append default exit policy before checking for implicit internal
  27576. addresses. Now we don't log a bunch of complaints on startup
  27577. when using the default exit policy.
  27578. - Some people were putting "Address " in their torrc, and they had
  27579. a buggy resolver that resolved " " to 0.0.0.0. Oops.
  27580. - If DataDir is ~/.tor, and that expands to /.tor, then default to
  27581. LOCALSTATEDIR/tor instead.
  27582. - Fix fragmented-message bug in TorControl.py.
  27583. - Resolve a minor bug which would prevent unreachable dirports
  27584. from getting suppressed in the published descriptor.
  27585. - When the controller gave us a new descriptor, we weren't resolving
  27586. it immediately, so Tor would think its address was 0.0.0.0 until
  27587. we fetched a new directory.
  27588. - Fix an uppercase/lowercase case error in suppressing a bogus
  27589. libevent warning on some Linuxes.
  27590. o Features:
  27591. - Begin scrubbing sensitive strings from logs by default. Turn off
  27592. the config option SafeLogging if you need to do debugging.
  27593. - Switch to a new buffer management algorithm, which tries to avoid
  27594. reallocing and copying quite as much. In first tests it looks like
  27595. it uses *more* memory on average, but less cpu.
  27596. - First cut at support for "create-fast" cells. Clients can use
  27597. these when extending to their first hop, since the TLS already
  27598. provides forward secrecy and authentication. Not enabled on
  27599. clients yet.
  27600. - When dirservers refuse a router descriptor, we now log its
  27601. contactinfo, platform, and the poster's IP address.
  27602. - Call tor_free_all instead of connections_free_all after forking, to
  27603. save memory on systems that need to fork.
  27604. - Whine at you if you're a server and you don't set your contactinfo.
  27605. - Implement --verify-config command-line option to check if your torrc
  27606. is valid without actually launching Tor.
  27607. - Rewrite address "serifos.exit" to "localhost.serifos.exit"
  27608. rather than just rejecting it.
  27609. Changes in version 0.1.0.5-rc - 2005-04-27
  27610. o Bugfixes:
  27611. - Stop trying to print a null pointer if an OR conn fails because
  27612. we didn't like its cert.
  27613. o Features:
  27614. - Switch our internal buffers implementation to use a ring buffer,
  27615. to hopefully improve performance for fast servers a lot.
  27616. - Add HttpsProxyAuthenticator support (basic auth only), based
  27617. on patch from Adam Langley.
  27618. - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
  27619. the fast servers that have been joining lately.
  27620. - Give hidden service accesses extra time on the first attempt,
  27621. since 60 seconds is often only barely enough. This might improve
  27622. robustness more.
  27623. - Improve performance for dirservers: stop re-parsing the whole
  27624. directory every time you regenerate it.
  27625. - Add more debugging info to help us find the weird dns freebsd
  27626. pthreads bug; cleaner debug messages to help track future issues.
  27627. Changes in version 0.0.9.9 - 2005-04-23
  27628. o Bugfixes on 0.0.9.x:
  27629. - If unofficial Tor clients connect and send weird TLS certs, our
  27630. Tor server triggers an assert. This release contains a minimal
  27631. backport from the broader fix that we put into 0.1.0.4-rc.
  27632. Changes in version 0.1.0.4-rc - 2005-04-23
  27633. o Bugfixes:
  27634. - If unofficial Tor clients connect and send weird TLS certs, our
  27635. Tor server triggers an assert. Stop asserting, and start handling
  27636. TLS errors better in other situations too.
  27637. - When the controller asks us to tell it about all the debug-level
  27638. logs, it turns out we were generating debug-level logs while
  27639. telling it about them, which turns into a bad loop. Now keep
  27640. track of whether you're sending a debug log to the controller,
  27641. and don't log when you are.
  27642. - Fix the "postdescriptor" feature of the controller interface: on
  27643. non-complete success, only say "done" once.
  27644. o Features:
  27645. - Clients are now willing to load balance over up to 2mB, not 1mB,
  27646. of advertised bandwidth capacity.
  27647. - Add a NoPublish config option, so you can be a server (e.g. for
  27648. testing running Tor servers in other Tor networks) without
  27649. publishing your descriptor to the primary dirservers.
  27650. Changes in version 0.1.0.3-rc - 2005-04-08
  27651. o Improvements on 0.1.0.2-rc:
  27652. - Client now retries when streams end early for 'hibernating' or
  27653. 'resource limit' reasons, rather than failing them.
  27654. - More automated handling for dirserver operators:
  27655. - Automatically approve nodes running 0.1.0.2-rc or later,
  27656. now that the the reachability detection stuff is working.
  27657. - Now we allow two unverified servers with the same nickname
  27658. but different keys. But if a nickname is verified, only that
  27659. nickname+key are allowed.
  27660. - If you're an authdirserver connecting to an address:port,
  27661. and it's not the OR you were expecting, forget about that
  27662. descriptor. If he *was* the one you were expecting, then forget
  27663. about all other descriptors for that address:port.
  27664. - Allow servers to publish descriptors from 12 hours in the future.
  27665. Corollary: only whine about clock skew from the dirserver if
  27666. he's a trusted dirserver (since now even verified servers could
  27667. have quite wrong clocks).
  27668. - Adjust maximum skew and age for rendezvous descriptors: let skew
  27669. be 48 hours rather than 90 minutes.
  27670. - Efficiency improvements:
  27671. - Keep a big splay tree of (circid,orconn)->circuit mappings to make
  27672. it much faster to look up a circuit for each relay cell.
  27673. - Remove most calls to assert_all_pending_dns_resolves_ok(),
  27674. since they're eating our cpu on exit nodes.
  27675. - Stop wasting time doing a case insensitive comparison for every
  27676. dns name every time we do any lookup. Canonicalize the names to
  27677. lowercase and be done with it.
  27678. - Start sending 'truncated' cells back rather than destroy cells,
  27679. if the circuit closes in front of you. This means we won't have
  27680. to abandon partially built circuits.
  27681. - Only warn once per nickname from add_nickname_list_to_smartlist
  27682. per failure, so an entrynode or exitnode choice that's down won't
  27683. yell so much.
  27684. - Put a note in the torrc about abuse potential with the default
  27685. exit policy.
  27686. - Revise control spec and implementation to allow all log messages to
  27687. be sent to controller with their severities intact (suggested by
  27688. Matt Edman). Update TorControl to handle new log event types.
  27689. - Provide better explanation messages when controller's POSTDESCRIPTOR
  27690. fails.
  27691. - Stop putting nodename in the Platform string in server descriptors.
  27692. It doesn't actually help, and it is confusing/upsetting some people.
  27693. o Bugfixes on 0.1.0.2-rc:
  27694. - We were printing the host mask wrong in exit policies in server
  27695. descriptors. This isn't a critical bug though, since we were still
  27696. obeying the exit policy internally.
  27697. - Fix Tor when compiled with libevent but without pthreads: move
  27698. connection_unregister() from _connection_free() to
  27699. connection_free().
  27700. - Fix an assert trigger (already fixed in 0.0.9.x): when we have
  27701. the rare mysterious case of accepting a conn on 0.0.0.0:0, then
  27702. when we look through the connection array, we'll find any of the
  27703. cpu/dnsworkers. This is no good.
  27704. o Bugfixes on 0.0.9.8:
  27705. - Fix possible bug on threading platforms (e.g. win32) which was
  27706. leaking a file descriptor whenever a cpuworker or dnsworker died.
  27707. - When using preferred entry or exit nodes, ignore whether the
  27708. circuit wants uptime or capacity. They asked for the nodes, they
  27709. get the nodes.
  27710. - chdir() to your datadirectory at the *end* of the daemonize process,
  27711. not the beginning. This was a problem because the first time you
  27712. run tor, if your datadir isn't there, and you have runasdaemon set
  27713. to 1, it will try to chdir to it before it tries to create it. Oops.
  27714. - Handle changed router status correctly when dirserver reloads
  27715. fingerprint file. We used to be dropping all unverified descriptors
  27716. right then. The bug was hidden because we would immediately
  27717. fetch a directory from another dirserver, which would include the
  27718. descriptors we just dropped.
  27719. - When we're connecting to an OR and he's got a different nickname/key
  27720. than we were expecting, only complain loudly if we're an OP or a
  27721. dirserver. Complaining loudly to the OR admins just confuses them.
  27722. - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
  27723. artificially capped at 500kB.
  27724. Changes in version 0.0.9.8 - 2005-04-07
  27725. o Bugfixes on 0.0.9.x:
  27726. - We have a bug that I haven't found yet. Sometimes, very rarely,
  27727. cpuworkers get stuck in the 'busy' state, even though the cpuworker
  27728. thinks of itself as idle. This meant that no new circuits ever got
  27729. established. Here's a workaround to kill any cpuworker that's been
  27730. busy for more than 100 seconds.
  27731. Changes in version 0.1.0.2-rc - 2005-04-01
  27732. o Bugfixes on 0.1.0.1-rc:
  27733. - Fixes on reachability detection:
  27734. - Don't check for reachability while hibernating.
  27735. - If ORPort is reachable but DirPort isn't, still publish the
  27736. descriptor, but zero out DirPort until it's found reachable.
  27737. - When building testing circs for ORPort testing, use only
  27738. high-bandwidth nodes, so fewer circuits fail.
  27739. - Complain about unreachable ORPort separately from unreachable
  27740. DirPort, so the user knows what's going on.
  27741. - Make sure we only conclude ORPort reachability if we didn't
  27742. initiate the conn. Otherwise we could falsely conclude that
  27743. we're reachable just because we connected to the guy earlier
  27744. and he used that same pipe to extend to us.
  27745. - Authdirservers shouldn't do ORPort reachability detection,
  27746. since they're in clique mode, so it will be rare to find a
  27747. server not already connected to them.
  27748. - When building testing circuits, always pick middle hops running
  27749. Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
  27750. bug. (This is a kludge; it will go away when 0.0.9.x becomes
  27751. obsolete.)
  27752. - When we decide we're reachable, actually publish our descriptor
  27753. right then.
  27754. - Fix bug in redirectstream in the controller.
  27755. - Fix the state descriptor strings so logs don't claim edge streams
  27756. are in a different state than they actually are.
  27757. - Use recent libevent features when possible (this only really affects
  27758. win32 and osx right now, because the new libevent with these
  27759. features hasn't been released yet). Add code to suppress spurious
  27760. libevent log msgs.
  27761. - Prevent possible segfault in connection_close_unattached_ap().
  27762. - Fix newlines on torrc in win32.
  27763. - Improve error msgs when tor-resolve fails.
  27764. o Improvements on 0.0.9.x:
  27765. - New experimental script tor/contrib/ExerciseServer.py (needs more
  27766. work) that uses the controller interface to build circuits and
  27767. fetch pages over them. This will help us bootstrap servers that
  27768. have lots of capacity but haven't noticed it yet.
  27769. - New experimental script tor/contrib/PathDemo.py (needs more work)
  27770. that uses the controller interface to let you choose whole paths
  27771. via addresses like
  27772. "<hostname>.<path,separated by dots>.<length of path>.path"
  27773. - When we've connected to an OR and handshaked but didn't like
  27774. the result, we were closing the conn without sending destroy
  27775. cells back for pending circuits. Now send those destroys.
  27776. Changes in version 0.0.9.7 - 2005-04-01
  27777. o Bugfixes on 0.0.9.x:
  27778. - Fix another race crash bug (thanks to Glenn Fink for reporting).
  27779. - Compare identity to identity, not to nickname, when extending to
  27780. a router not already in the directory. This was preventing us from
  27781. extending to unknown routers. Oops.
  27782. - Make sure to create OS X Tor user in <500 range, so we aren't
  27783. creating actual system users.
  27784. - Note where connection-that-hasn't-sent-end was marked, and fix
  27785. a few really loud instances of this harmless bug (it's fixed more
  27786. in 0.1.0.x).
  27787. Changes in version 0.1.0.1-rc - 2005-03-28
  27788. o New features:
  27789. - Add reachability testing. Your Tor server will automatically try
  27790. to see if its ORPort and DirPort are reachable from the outside,
  27791. and it won't upload its descriptor until it decides they are.
  27792. - Handle unavailable hidden services better. Handle slow or busy
  27793. hidden services better.
  27794. - Add support for CONNECTing through https proxies, with "HttpsProxy"
  27795. config option.
  27796. - New exit policy: accept most low-numbered ports, rather than
  27797. rejecting most low-numbered ports.
  27798. - More Tor controller support (still experimental). See
  27799. http://tor.eff.org/doc/control-spec.txt for all the new features,
  27800. including signals to emulate unix signals from any platform;
  27801. redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
  27802. closestream; closecircuit; etc.
  27803. - Make nt services work and start on startup on win32 (based on
  27804. patch by Matt Edman).
  27805. - Add a new AddressMap config directive to rewrite incoming socks
  27806. addresses. This lets you, for example, declare an implicit
  27807. required exit node for certain sites.
  27808. - Add a new TrackHostExits config directive to trigger addressmaps
  27809. for certain incoming socks addresses -- for sites that break when
  27810. your exit keeps changing (based on patch by Mike Perry).
  27811. - Redo the client-side dns cache so it's just an addressmap too.
  27812. - Notice when our IP changes, and reset stats/uptime/reachability.
  27813. - When an application is using socks5, give him the whole variety of
  27814. potential socks5 responses (connect refused, host unreachable, etc),
  27815. rather than just "success" or "failure".
  27816. - A more sane version numbering system. See
  27817. http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
  27818. - New contributed script "exitlist": a simple python script to
  27819. parse directories and find Tor nodes that exit to listed
  27820. addresses/ports.
  27821. - New contributed script "privoxy-tor-toggle" to toggle whether
  27822. Privoxy uses Tor. Seems to be configured for Debian by default.
  27823. - Report HTTP reasons to client when getting a response from directory
  27824. servers -- so you can actually know what went wrong.
  27825. - New config option MaxAdvertisedBandwidth which lets you advertise
  27826. a low bandwidthrate (to not attract as many circuits) while still
  27827. allowing a higher bandwidthrate in reality.
  27828. o Robustness/stability fixes:
  27829. - Make Tor use Niels Provos's libevent instead of its current
  27830. poll-but-sometimes-select mess. This will let us use faster async
  27831. cores (like epoll, kpoll, and /dev/poll), and hopefully work better
  27832. on Windows too.
  27833. - pthread support now too. This was forced because when we forked,
  27834. we ended up wasting a lot of duplicate ram over time. Also switch
  27835. to foo_r versions of some library calls to allow reentry and
  27836. threadsafeness.
  27837. - Better handling for heterogeneous / unreliable nodes:
  27838. - Annotate circuits w/ whether they aim to contain high uptime nodes
  27839. and/or high capacity nodes. When building circuits, choose
  27840. appropriate nodes.
  27841. - This means that every single node in an intro rend circuit,
  27842. not just the last one, will have a minimum uptime.
  27843. - New config option LongLivedPorts to indicate application streams
  27844. that will want high uptime circuits.
  27845. - Servers reset uptime when a dir fetch entirely fails. This
  27846. hopefully reflects stability of the server's network connectivity.
  27847. - If somebody starts his tor server in Jan 2004 and then fixes his
  27848. clock, don't make his published uptime be a year.
  27849. - Reset published uptime when you wake up from hibernation.
  27850. - Introduce a notion of 'internal' circs, which are chosen without
  27851. regard to the exit policy of the last hop. Intro and rendezvous
  27852. circs must be internal circs, to avoid leaking information. Resolve
  27853. and connect streams can use internal circs if they want.
  27854. - New circuit pooling algorithm: make sure to have enough circs around
  27855. to satisfy any predicted ports, and also make sure to have 2 internal
  27856. circs around if we've required internal circs lately (and with high
  27857. uptime if we've seen that lately too).
  27858. - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
  27859. which describes how often we retry making new circuits if current
  27860. ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
  27861. how long we're willing to make use of an already-dirty circuit.
  27862. - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
  27863. circ as necessary, if there are any completed ones lying around
  27864. when we try to launch one.
  27865. - Make hidden services try to establish a rendezvous for 30 seconds,
  27866. rather than for n (where n=3) attempts to build a circuit.
  27867. - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
  27868. "ShutdownWaitLength".
  27869. - Try to be more zealous about calling connection_edge_end when
  27870. things go bad with edge conns in connection.c.
  27871. - Revise tor-spec to add more/better stream end reasons.
  27872. - Revise all calls to connection_edge_end to avoid sending "misc",
  27873. and to take errno into account where possible.
  27874. o Bug fixes:
  27875. - Fix a race condition that can trigger an assert, when we have a
  27876. pending create cell and an OR connection fails right then.
  27877. - Fix several double-mark-for-close bugs, e.g. where we were finding
  27878. a conn for a cell even if that conn is already marked for close.
  27879. - Make sequence of log messages when starting on win32 with no config
  27880. file more reasonable.
  27881. - When choosing an exit node for a new non-internal circ, don't take
  27882. into account whether it'll be useful for any pending x.onion
  27883. addresses -- it won't.
  27884. - Turn addr_policy_compare from a tristate to a quadstate; this should
  27885. help address our "Ah, you allow 1.2.3.4:80. You are a good choice
  27886. for google.com" problem.
  27887. - Make "platform" string in descriptor more accurate for Win32 servers,
  27888. so it's not just "unknown platform".
  27889. - Fix an edge case in parsing config options (thanks weasel).
  27890. If they say "--" on the commandline, it's not an option.
  27891. - Reject odd-looking addresses at the client (e.g. addresses that
  27892. contain a colon), rather than having the server drop them because
  27893. they're malformed.
  27894. - tor-resolve requests were ignoring .exit if there was a working circuit
  27895. they could use instead.
  27896. - REUSEADDR on normal platforms means you can rebind to the port
  27897. right after somebody else has let it go. But REUSEADDR on win32
  27898. means to let you bind to the port _even when somebody else
  27899. already has it bound_! So, don't do that on Win32.
  27900. - Change version parsing logic: a version is "obsolete" if it is not
  27901. recommended and (1) there is a newer recommended version in the
  27902. same series, or (2) there are no recommended versions in the same
  27903. series, but there are some recommended versions in a newer series.
  27904. A version is "new" if it is newer than any recommended version in
  27905. the same series.
  27906. - Stop most cases of hanging up on a socks connection without sending
  27907. the socks reject.
  27908. o Helpful fixes:
  27909. - Require BandwidthRate to be at least 20kB/s for servers.
  27910. - When a dirserver causes you to give a warn, mention which dirserver
  27911. it was.
  27912. - New config option DirAllowPrivateAddresses for authdirservers.
  27913. Now by default they refuse router descriptors that have non-IP or
  27914. private-IP addresses.
  27915. - Stop publishing socksport in the directory, since it's not
  27916. actually meant to be public. For compatibility, publish a 0 there
  27917. for now.
  27918. - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
  27919. smart" value, that is low for servers and high for clients.
  27920. - If our clock jumps forward by 100 seconds or more, assume something
  27921. has gone wrong with our network and abandon all not-yet-used circs.
  27922. - Warn when exit policy implicitly allows local addresses.
  27923. - If we get an incredibly skewed timestamp from a dirserver mirror
  27924. that isn't a verified OR, don't warn -- it's probably him that's
  27925. wrong.
  27926. - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
  27927. cookies to disk and doesn't log each web request to disk. (Thanks
  27928. to Brett Carrington for pointing this out.)
  27929. - When a client asks us for a dir mirror and we don't have one,
  27930. launch an attempt to get a fresh one.
  27931. - If we're hibernating and we get a SIGINT, exit immediately.
  27932. - Add --with-dmalloc ./configure option, to track memory leaks.
  27933. - And try to free all memory on closing, so we can detect what
  27934. we're leaking.
  27935. - Cache local dns resolves correctly even when they're .exit
  27936. addresses.
  27937. - Give a better warning when some other server advertises an
  27938. ORPort that is actually an apache running ssl.
  27939. - Add "opt hibernating 1" to server descriptor to make it clearer
  27940. whether the server is hibernating.
  27941. Changes in version 0.0.9.6 - 2005-03-24
  27942. o Bugfixes on 0.0.9.x (crashes and asserts):
  27943. - Add new end stream reasons to maintenance branch. Fix bug where
  27944. reason (8) could trigger an assert. Prevent bug from recurring.
  27945. - Apparently win32 stat wants paths to not end with a slash.
  27946. - Fix assert triggers in assert_cpath_layer_ok(), where we were
  27947. blowing away the circuit that conn->cpath_layer points to, then
  27948. checking to see if the circ is well-formed. Backport check to make
  27949. sure we dont use the cpath on a closed connection.
  27950. - Prevent circuit_resume_edge_reading_helper() from trying to package
  27951. inbufs for marked-for-close streams.
  27952. - Don't crash on hup if your options->address has become unresolvable.
  27953. - Some systems (like OS X) sometimes accept() a connection and tell
  27954. you the remote host is 0.0.0.0:0. If this happens, due to some
  27955. other mis-features, we get confused; so refuse the conn for now.
  27956. o Bugfixes on 0.0.9.x (other):
  27957. - Fix harmless but scary "Unrecognized content encoding" warn message.
  27958. - Add new stream error reason: TORPROTOCOL reason means "you are not
  27959. speaking a version of Tor I understand; say bye-bye to your stream."
  27960. - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
  27961. into the future, now that we are more tolerant of skew. This
  27962. resolves a bug where a Tor server would refuse to cache a directory
  27963. because all the directories it gets are too far in the future;
  27964. yet the Tor server never logs any complaints about clock skew.
  27965. - Mac packaging magic: make man pages useable, and do not overwrite
  27966. existing torrc files.
  27967. - Make OS X log happily to /var/log/tor/tor.log
  27968. Changes in version 0.0.9.5 - 2005-02-22
  27969. o Bugfixes on 0.0.9.x:
  27970. - Fix an assert race at exit nodes when resolve requests fail.
  27971. - Stop picking unverified dir mirrors--it only leads to misery.
  27972. - Patch from Matt Edman to make NT services work better. Service
  27973. support is still not compiled into the executable by default.
  27974. - Patch from Dmitri Bely so the Tor service runs better under
  27975. the win32 SYSTEM account.
  27976. - Make tor-resolve actually work (?) on Win32.
  27977. - Fix a sign bug when getrlimit claims to have 4+ billion
  27978. file descriptors available.
  27979. - Stop refusing to start when bandwidthburst == bandwidthrate.
  27980. - When create cells have been on the onion queue more than five
  27981. seconds, just send back a destroy and take them off the list.
  27982. Changes in version 0.0.9.4 - 2005-02-03
  27983. o Bugfixes on 0.0.9:
  27984. - Fix an assert bug that took down most of our servers: when
  27985. a server claims to have 1 GB of bandwidthburst, don't
  27986. freak out.
  27987. - Don't crash as badly if we have spawned the max allowed number
  27988. of dnsworkers, or we're out of file descriptors.
  27989. - Block more file-sharing ports in the default exit policy.
  27990. - MaxConn is now automatically set to the hard limit of max
  27991. file descriptors we're allowed (ulimit -n), minus a few for
  27992. logs, etc.
  27993. - Give a clearer message when servers need to raise their
  27994. ulimit -n when they start running out of file descriptors.
  27995. - SGI Compatibility patches from Jan Schaumann.
  27996. - Tolerate a corrupt cached directory better.
  27997. - When a dirserver hasn't approved your server, list which one.
  27998. - Go into soft hibernation after 95% of the bandwidth is used,
  27999. not 99%. This is especially important for daily hibernators who
  28000. have a small accounting max. Hopefully it will result in fewer
  28001. cut connections when the hard hibernation starts.
  28002. - Load-balance better when using servers that claim more than
  28003. 800kB/s of capacity.
  28004. - Make NT services work (experimental, only used if compiled in).
  28005. Changes in version 0.0.9.3 - 2005-01-21
  28006. o Bugfixes on 0.0.9:
  28007. - Backport the cpu use fixes from main branch, so busy servers won't
  28008. need as much processor time.
  28009. - Work better when we go offline and then come back, or when we
  28010. run Tor at boot before the network is up. We do this by
  28011. optimistically trying to fetch a new directory whenever an
  28012. application request comes in and we think we're offline -- the
  28013. human is hopefully a good measure of when the network is back.
  28014. - Backport some minimal hidserv bugfixes: keep rend circuits open as
  28015. long as you keep using them; actually publish hidserv descriptors
  28016. shortly after they change, rather than waiting 20-40 minutes.
  28017. - Enable Mac startup script by default.
  28018. - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
  28019. - When you update AllowUnverifiedNodes or FirewallPorts via the
  28020. controller's setconf feature, we were always appending, never
  28021. resetting.
  28022. - When you update HiddenServiceDir via setconf, it was screwing up
  28023. the order of reading the lines, making it fail.
  28024. - Do not rewrite a cached directory back to the cache; otherwise we
  28025. will think it is recent and not fetch a newer one on startup.
  28026. - Workaround for webservers that lie about Content-Encoding: Tor
  28027. now tries to autodetect compressed directories and compression
  28028. itself. This lets us Proxypass dir fetches through apache.
  28029. Changes in version 0.0.9.2 - 2005-01-04
  28030. o Bugfixes on 0.0.9 (crashes and asserts):
  28031. - Fix an assert on startup when the disk is full and you're logging
  28032. to a file.
  28033. - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
  28034. style address, then we'd crash.
  28035. - Fix an assert trigger when the running-routers string we get from
  28036. a dirserver is broken.
  28037. - Make worker threads start and run on win32. Now win32 servers
  28038. may work better.
  28039. - Bandaid (not actually fix, but now it doesn't crash) an assert
  28040. where the dns worker dies mysteriously and the main Tor process
  28041. doesn't remember anything about the address it was resolving.
  28042. o Bugfixes on 0.0.9 (Win32):
  28043. - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
  28044. name out of the warning/assert messages.
  28045. - Fix a superficial "unhandled error on read" bug on win32.
  28046. - The win32 installer no longer requires a click-through for our
  28047. license, since our Free Software license grants rights but does not
  28048. take any away.
  28049. - Win32: When connecting to a dirserver fails, try another one
  28050. immediately. (This was already working for non-win32 Tors.)
  28051. - Stop trying to parse $HOME on win32 when hunting for default
  28052. DataDirectory.
  28053. - Make tor-resolve.c work on win32 by calling network_init().
  28054. o Bugfixes on 0.0.9 (other):
  28055. - Make 0.0.9.x build on Solaris again.
  28056. - Due to a fencepost error, we were blowing away the \n when reporting
  28057. confvalue items in the controller. So asking for multiple config
  28058. values at once couldn't work.
  28059. - When listing circuits that are pending on an opening OR connection,
  28060. if we're an OR we were listing circuits that *end* at us as
  28061. being pending on every listener, dns/cpu worker, etc. Stop that.
  28062. - Dirservers were failing to create 'running-routers' or 'directory'
  28063. strings if we had more than some threshold of routers. Fix them so
  28064. they can handle any number of routers.
  28065. - Fix a superficial "Duplicate mark for close" bug.
  28066. - Stop checking for clock skew for OR connections, even for servers.
  28067. - Fix a fencepost error that was chopping off the last letter of any
  28068. nickname that is the maximum allowed nickname length.
  28069. - Update URLs in log messages so they point to the new website.
  28070. - Fix a potential problem in mangling server private keys while
  28071. writing to disk (not triggered yet, as far as we know).
  28072. - Include the licenses for other free software we include in Tor,
  28073. now that we're shipping binary distributions more regularly.
  28074. Changes in version 0.0.9.1 - 2004-12-15
  28075. o Bugfixes on 0.0.9:
  28076. - Make hibernation actually work.
  28077. - Make HashedControlPassword config option work.
  28078. - When we're reporting event circuit status to a controller,
  28079. don't use the stream status code.
  28080. Changes in version 0.0.9 - 2004-12-12
  28081. o Cleanups:
  28082. - Clean up manpage and torrc.sample file.
  28083. - Clean up severities and text of log warnings.
  28084. o Mistakes:
  28085. - Make servers trigger an assert when they enter hibernation.
  28086. Changes in version 0.0.9rc7 - 2004-12-08
  28087. o Bugfixes on 0.0.9rc:
  28088. - Fix a stack-trashing crash when an exit node begins hibernating.
  28089. - Avoid looking at unallocated memory while considering which
  28090. ports we need to build circuits to cover.
  28091. - Stop a sigpipe: when an 'end' cell races with eof from the app,
  28092. we shouldn't hold-open-until-flush if the eof arrived first.
  28093. - Fix a bug with init_cookie_authentication() in the controller.
  28094. - When recommending new-format log lines, if the upper bound is
  28095. LOG_ERR, leave it implicit.
  28096. o Bugfixes on 0.0.8.1:
  28097. - Fix a whole slew of memory leaks.
  28098. - Fix isspace() and friends so they still make Solaris happy
  28099. but also so they don't trigger asserts on win32.
  28100. - Fix parse_iso_time on platforms without strptime (eg win32).
  28101. - win32: tolerate extra "readable" events better.
  28102. - win32: when being multithreaded, leave parent fdarray open.
  28103. - Make unit tests work on win32.
  28104. Changes in version 0.0.9rc6 - 2004-12-06
  28105. o Bugfixes on 0.0.9pre:
  28106. - Clean up some more integer underflow opportunities (not exploitable
  28107. we think).
  28108. - While hibernating, hup should not regrow our listeners.
  28109. - Send an end to the streams we close when we hibernate, rather
  28110. than just chopping them off.
  28111. - React to eof immediately on non-open edge connections.
  28112. o Bugfixes on 0.0.8.1:
  28113. - Calculate timeout for waiting for a connected cell from the time
  28114. we sent the begin cell, not from the time the stream started. If
  28115. it took a long time to establish the circuit, we would time out
  28116. right after sending the begin cell.
  28117. - Fix router_compare_addr_to_addr_policy: it was not treating a port
  28118. of * as always matching, so we were picking reject *:* nodes as
  28119. exit nodes too. Oops.
  28120. o Features:
  28121. - New circuit building strategy: keep a list of ports that we've
  28122. used in the past 6 hours, and always try to have 2 circuits open
  28123. or on the way that will handle each such port. Seed us with port
  28124. 80 so web users won't complain that Tor is "slow to start up".
  28125. - Make kill -USR1 dump more useful stats about circuits.
  28126. - When warning about retrying or giving up, print the address, so
  28127. the user knows which one it's talking about.
  28128. - If you haven't used a clean circuit in an hour, throw it away,
  28129. just to be on the safe side. (This means after 6 hours a totally
  28130. unused Tor client will have no circuits open.)
  28131. Changes in version 0.0.9rc5 - 2004-12-01
  28132. o Bugfixes on 0.0.8.1:
  28133. - Disallow NDEBUG. We don't ever want anybody to turn off debug.
  28134. - Let resolve conns retry/expire also, rather than sticking around
  28135. forever.
  28136. - If we are using select, make sure we stay within FD_SETSIZE.
  28137. o Bugfixes on 0.0.9pre:
  28138. - Fix integer underflow in tor_vsnprintf() that may be exploitable,
  28139. but doesn't seem to be currently; thanks to Ilja van Sprundel for
  28140. finding it.
  28141. - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
  28142. instead. Impose minima and maxima for all *Period options; impose
  28143. even tighter maxima for fetching if we are a caching dirserver.
  28144. Clip rather than rejecting.
  28145. - Fetch cached running-routers from servers that serve it (that is,
  28146. authdirservers and servers running 0.0.9rc5-cvs or later.)
  28147. o Features:
  28148. - Accept *:706 (silc) in default exit policy.
  28149. - Implement new versioning format for post 0.1.
  28150. - Support "foo.nickname.exit" addresses, to let Alice request the
  28151. address "foo" as viewed by exit node "nickname". Based on a patch
  28152. by Geoff Goodell.
  28153. - Make tor --version --version dump the cvs Id of every file.
  28154. Changes in version 0.0.9rc4 - 2004-11-28
  28155. o Bugfixes on 0.0.8.1:
  28156. - Make windows sockets actually non-blocking (oops), and handle
  28157. win32 socket errors better.
  28158. o Bugfixes on 0.0.9rc1:
  28159. - Actually catch the -USR2 signal.
  28160. Changes in version 0.0.9rc3 - 2004-11-25
  28161. o Bugfixes on 0.0.8.1:
  28162. - Flush the log file descriptor after we print "Tor opening log file",
  28163. so we don't see those messages days later.
  28164. o Bugfixes on 0.0.9rc1:
  28165. - Make tor-resolve work again.
  28166. - Avoid infinite loop in tor-resolve if tor hangs up on it.
  28167. - Fix an assert trigger for clients/servers handling resolves.
  28168. Changes in version 0.0.9rc2 - 2004-11-24
  28169. o Bugfixes on 0.0.9rc1:
  28170. - I broke socks5 support while fixing the eof bug.
  28171. - Allow unitless bandwidths and intervals; they default to bytes
  28172. and seconds.
  28173. - New servers don't start out hibernating; they are active until
  28174. they run out of bytes, so they have a better estimate of how
  28175. long it takes, and so their operators can know they're working.
  28176. Changes in version 0.0.9rc1 - 2004-11-23
  28177. o Bugfixes on 0.0.8.1:
  28178. - Finally fix a bug that's been plaguing us for a year:
  28179. With high load, circuit package window was reaching 0. Whenever
  28180. we got a circuit-level sendme, we were reading a lot on each
  28181. socket, but only writing out a bit. So we would eventually reach
  28182. eof. This would be noticed and acted on even when there were still
  28183. bytes sitting in the inbuf.
  28184. - When poll() is interrupted, we shouldn't believe the revents values.
  28185. o Bugfixes on 0.0.9pre6:
  28186. - Fix hibernate bug that caused pre6 to be broken.
  28187. - Don't keep rephist info for routers that haven't had activity for
  28188. 24 hours. (This matters now that clients have keys, since we track
  28189. them too.)
  28190. - Never call close_temp_logs while validating log options.
  28191. - Fix backslash-escaping on tor.sh.in and torctl.in.
  28192. o Features:
  28193. - Implement weekly/monthly/daily accounting: now you specify your
  28194. hibernation properties by
  28195. AccountingMax N bytes|KB|MB|GB|TB
  28196. AccountingStart day|week|month [day] HH:MM
  28197. Defaults to "month 1 0:00".
  28198. - Let bandwidth and interval config options be specified as 5 bytes,
  28199. kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
  28200. - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
  28201. get back to normal.)
  28202. - If your requested entry or exit node has advertised bandwidth 0,
  28203. pick it anyway.
  28204. - Be more greedy about filling up relay cells -- we try reading again
  28205. once we've processed the stuff we read, in case enough has arrived
  28206. to fill the last cell completely.
  28207. - Apply NT service patch from Osamu Fujino. Still needs more work.
  28208. Changes in version 0.0.9pre6 - 2004-11-15
  28209. o Bugfixes on 0.0.8.1:
  28210. - Fix assert failure on malformed socks4a requests.
  28211. - Use identity comparison, not nickname comparison, to choose which
  28212. half of circuit-ID-space each side gets to use. This is needed
  28213. because sometimes we think of a router as a nickname, and sometimes
  28214. as a hex ID, and we can't predict what the other side will do.
  28215. - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
  28216. write() call will fail and we handle it there.
  28217. - Add a FAST_SMARTLIST define to optionally inline smartlist_get
  28218. and smartlist_len, which are two major profiling offenders.
  28219. o Bugfixes on 0.0.9pre5:
  28220. - Fix a bug in read_all that was corrupting config files on windows.
  28221. - When we're raising the max number of open file descriptors to
  28222. 'unlimited', don't log that we just raised it to '-1'.
  28223. - Include event code with events, as required by control-spec.txt.
  28224. - Don't give a fingerprint when clients do --list-fingerprint:
  28225. it's misleading, because it will never be the same again.
  28226. - Stop using strlcpy in tor_strndup, since it was slowing us
  28227. down a lot.
  28228. - Remove warn on startup about missing cached-directory file.
  28229. - Make kill -USR1 work again.
  28230. - Hibernate if we start tor during the "wait for wakeup-time" phase
  28231. of an accounting interval. Log our hibernation plans better.
  28232. - Authoritative dirservers now also cache their directory, so they
  28233. have it on start-up.
  28234. o Features:
  28235. - Fetch running-routers; cache running-routers; compress
  28236. running-routers; serve compressed running-routers.z
  28237. - Add NSI installer script contributed by J Doe.
  28238. - Commit VC6 and VC7 workspace/project files.
  28239. - Commit a tor.spec for making RPM files, with help from jbash.
  28240. - Add contrib/torctl.in contributed by Glenn Fink.
  28241. - Implement the control-spec's SAVECONF command, to write your
  28242. configuration to torrc.
  28243. - Get cookie authentication for the controller closer to working.
  28244. - Include control-spec.txt in the tarball.
  28245. - When set_conf changes our server descriptor, upload a new copy.
  28246. But don't upload it too often if there are frequent changes.
  28247. - Document authentication config in man page, and document signals
  28248. we catch.
  28249. - Clean up confusing parts of man page and torrc.sample.
  28250. - Make expand_filename handle ~ and ~username.
  28251. - Use autoconf to enable largefile support where necessary. Use
  28252. ftello where available, since ftell can fail at 2GB.
  28253. - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
  28254. log more informatively.
  28255. - Give a slightly more useful output for "tor -h".
  28256. - Refuse application socks connections to port 0.
  28257. - Check clock skew for verified servers, but allow unverified
  28258. servers and clients to have any clock skew.
  28259. - Break DirFetchPostPeriod into:
  28260. - DirFetchPeriod for fetching full directory,
  28261. - StatusFetchPeriod for fetching running-routers,
  28262. - DirPostPeriod for posting server descriptor,
  28263. - RendPostPeriod for posting hidden service descriptors.
  28264. - Make sure the hidden service descriptors are at a random offset
  28265. from each other, to hinder linkability.
  28266. Changes in version 0.0.9pre5 - 2004-11-09
  28267. o Bugfixes on 0.0.9pre4:
  28268. - Fix a seg fault in unit tests (doesn't affect main program).
  28269. - Fix an assert bug where a hidden service provider would fail if
  28270. the first hop of his rendezvous circuit was down.
  28271. - Hidden service operators now correctly handle version 1 style
  28272. INTRODUCE1 cells (nobody generates them still, so not a critical
  28273. bug).
  28274. - If do_hup fails, actually notice.
  28275. - Handle more errnos from accept() without closing the listener.
  28276. Some OpenBSD machines were closing their listeners because
  28277. they ran out of file descriptors.
  28278. - Send resolve cells to exit routers that are running a new
  28279. enough version of the resolve code to work right.
  28280. - Better handling of winsock includes on non-MSV win32 compilers.
  28281. - Some people had wrapped their tor client/server in a script
  28282. that would restart it whenever it died. This did not play well
  28283. with our "shut down if your version is obsolete" code. Now people
  28284. don't fetch a new directory if their local cached version is
  28285. recent enough.
  28286. - Make our autogen.sh work on ksh as well as bash.
  28287. o Major Features:
  28288. - Hibernation: New config option "AccountingMaxKB" lets you
  28289. set how many KBytes per month you want to allow your server to
  28290. consume. Rather than spreading those bytes out evenly over the
  28291. month, we instead hibernate for some of the month and pop up
  28292. at a deterministic time, work until the bytes are consumed, then
  28293. hibernate again. Config option "MonthlyAccountingStart" lets you
  28294. specify which day of the month your billing cycle starts on.
  28295. - Control interface: a separate program can now talk to your
  28296. client/server over a socket, and get/set config options, receive
  28297. notifications of circuits and streams starting/finishing/dying,
  28298. bandwidth used, etc. The next step is to get some GUIs working.
  28299. Let us know if you want to help out. See doc/control-spec.txt .
  28300. - Ship a contrib/tor-control.py as an example script to interact
  28301. with the control port.
  28302. - "tor --hash-password zzyxz" will output a salted password for
  28303. use in authenticating to the control interface.
  28304. - New log format in config:
  28305. "Log minsev[-maxsev] stdout|stderr|syslog" or
  28306. "Log minsev[-maxsev] file /var/foo"
  28307. o Minor Features:
  28308. - DirPolicy config option, to let people reject incoming addresses
  28309. from their dirserver.
  28310. - "tor --list-fingerprint" will list your identity key fingerprint
  28311. and then exit.
  28312. - Add "pass" target for RedirectExit, to make it easier to break
  28313. out of a sequence of RedirectExit rules.
  28314. - Clients now generate a TLS cert too, in preparation for having
  28315. them act more like real nodes.
  28316. - Ship src/win32/ in the tarball, so people can use it to build.
  28317. - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
  28318. is broken.
  28319. - New "router-status" line in directory, to better bind each verified
  28320. nickname to its identity key.
  28321. - Deprecate unofficial config option abbreviations, and abbreviations
  28322. not on the command line.
  28323. - Add a pure-C tor-resolve implementation.
  28324. - Use getrlimit and friends to ensure we can reach MaxConn (currently
  28325. 1024) file descriptors.
  28326. o Code security improvements, inspired by Ilja:
  28327. - Replace sprintf with snprintf. (I think they were all safe, but
  28328. hey.)
  28329. - Replace strcpy/strncpy with strlcpy in more places.
  28330. - Avoid strcat; use snprintf or strlcat instead.
  28331. - snprintf wrapper with consistent (though not C99) overflow behavior.
  28332. Changes in version 0.0.9pre4 - 2004-10-17
  28333. o Bugfixes on 0.0.9pre3:
  28334. - If the server doesn't specify an exit policy, use the real default
  28335. exit policy, not reject *:*.
  28336. - Ignore fascistfirewall when uploading/downloading hidden service
  28337. descriptors, since we go through Tor for those; and when using
  28338. an HttpProxy, since we assume it can reach them all.
  28339. - When looking for an authoritative dirserver, use only the ones
  28340. configured at boot. Don't bother looking in the directory.
  28341. - The rest of the fix for get_default_conf_file() on older win32.
  28342. - Make 'Routerfile' config option obsolete.
  28343. o Features:
  28344. - New 'MyFamily nick1,...' config option for a server to
  28345. specify other servers that shouldn't be used in the same circuit
  28346. with it. Only believed if nick1 also specifies us.
  28347. - New 'NodeFamily nick1,nick2,...' config option for a client to
  28348. specify nodes that it doesn't want to use in the same circuit.
  28349. - New 'Redirectexit pattern address:port' config option for a
  28350. server to redirect exit connections, e.g. to a local squid.
  28351. Changes in version 0.0.9pre3 - 2004-10-13
  28352. o Bugfixes on 0.0.8.1:
  28353. - Better torrc example lines for dirbindaddress and orbindaddress.
  28354. - Improved bounds checking on parsed ints (e.g. config options and
  28355. the ones we find in directories.)
  28356. - Better handling of size_t vs int, so we're more robust on 64
  28357. bit platforms.
  28358. - Fix the rest of the bug where a newly started OR would appear
  28359. as unverified even after we've added his fingerprint and hupped
  28360. the dirserver.
  28361. - Fix a bug from 0.0.7: when read() failed on a stream, we would
  28362. close it without sending back an end. So 'connection refused'
  28363. would simply be ignored and the user would get no response.
  28364. o Bugfixes on 0.0.9pre2:
  28365. - Serving the cached-on-disk directory to people is bad. We now
  28366. provide no directory until we've fetched a fresh one.
  28367. - Workaround for bug on windows where cached-directories get crlf
  28368. corruption.
  28369. - Make get_default_conf_file() work on older windows too.
  28370. - If we write a *:* exit policy line in the descriptor, don't write
  28371. any more exit policy lines.
  28372. o Features:
  28373. - Use only 0.0.9pre1 and later servers for resolve cells.
  28374. - Make the dirservers file obsolete.
  28375. - Include a dir-signing-key token in directories to tell the
  28376. parsing entity which key is being used to sign.
  28377. - Remove the built-in bulky default dirservers string.
  28378. - New config option "Dirserver %s:%d [fingerprint]", which can be
  28379. repeated as many times as needed. If no dirservers specified,
  28380. default to moria1,moria2,tor26.
  28381. - Make moria2 advertise a dirport of 80, so people behind firewalls
  28382. will be able to get a directory.
  28383. - Http proxy support
  28384. - Dirservers translate requests for http://%s:%d/x to /x
  28385. - You can specify "HttpProxy %s[:%d]" and all dir fetches will
  28386. be routed through this host.
  28387. - Clients ask for /tor/x rather than /x for new enough dirservers.
  28388. This way we can one day coexist peacefully with apache.
  28389. - Clients specify a "Host: %s%d" http header, to be compatible
  28390. with more proxies, and so running squid on an exit node can work.
  28391. Changes in version 0.0.8.1 - 2004-10-13
  28392. o Bugfixes:
  28393. - Fix a seg fault that can be triggered remotely for Tor
  28394. clients/servers with an open dirport.
  28395. - Fix a rare assert trigger, where routerinfos for entries in
  28396. our cpath would expire while we're building the path.
  28397. - Fix a bug in OutboundBindAddress so it (hopefully) works.
  28398. - Fix a rare seg fault for people running hidden services on
  28399. intermittent connections.
  28400. - Fix a bug in parsing opt keywords with objects.
  28401. - Fix a stale pointer assert bug when a stream detaches and
  28402. reattaches.
  28403. - Fix a string format vulnerability (probably not exploitable)
  28404. in reporting stats locally.
  28405. - Fix an assert trigger: sometimes launching circuits can fail
  28406. immediately, e.g. because too many circuits have failed recently.
  28407. - Fix a compile warning on 64 bit platforms.
  28408. Changes in version 0.0.9pre2 - 2004-10-03
  28409. o Bugfixes:
  28410. - Make fetching a cached directory work for 64-bit platforms too.
  28411. - Make zlib.h a required header, not an optional header.
  28412. Changes in version 0.0.9pre1 - 2004-10-01
  28413. o Bugfixes:
  28414. - Stop using separate defaults for no-config-file and
  28415. empty-config-file. Now you have to explicitly turn off SocksPort,
  28416. if you don't want it open.
  28417. - Fix a bug in OutboundBindAddress so it (hopefully) works.
  28418. - Improve man page to mention more of the 0.0.8 features.
  28419. - Fix a rare seg fault for people running hidden services on
  28420. intermittent connections.
  28421. - Change our file IO stuff (especially wrt OpenSSL) so win32 is
  28422. happier.
  28423. - Fix more dns related bugs: send back resolve_failed and end cells
  28424. more reliably when the resolve fails, rather than closing the
  28425. circuit and then trying to send the cell. Also attach dummy resolve
  28426. connections to a circuit *before* calling dns_resolve(), to fix
  28427. a bug where cached answers would never be sent in RESOLVED cells.
  28428. - When we run out of disk space, or other log writing error, don't
  28429. crash. Just stop logging to that log and continue.
  28430. - We were starting to daemonize before we opened our logs, so if
  28431. there were any problems opening logs, we would complain to stderr,
  28432. which wouldn't work, and then mysteriously exit.
  28433. - Fix a rare bug where sometimes a verified OR would connect to us
  28434. before he'd uploaded his descriptor, which would cause us to
  28435. assign conn->nickname as though he's unverified. Now we look through
  28436. the fingerprint list to see if he's there.
  28437. - Fix a rare assert trigger, where routerinfos for entries in
  28438. our cpath would expire while we're building the path.
  28439. o Features:
  28440. - Clients can ask dirservers for /dir.z to get a compressed version
  28441. of the directory. Only works for servers running 0.0.9, of course.
  28442. - Make clients cache directories and use them to seed their router
  28443. lists at startup. This means clients have a datadir again.
  28444. - Configuration infrastructure support for warning on obsolete
  28445. options.
  28446. - Respond to content-encoding headers by trying to uncompress as
  28447. appropriate.
  28448. - Reply with a deflated directory when a client asks for "dir.z".
  28449. We could use allow-encodings instead, but allow-encodings isn't
  28450. specified in HTTP 1.0.
  28451. - Raise the max dns workers from 50 to 100.
  28452. - Discourage people from setting their dirfetchpostperiod more often
  28453. than once per minute.
  28454. - Protect dirservers from overzealous descriptor uploading -- wait
  28455. 10 seconds after directory gets dirty, before regenerating.
  28456. Changes in version 0.0.8 - 2004-08-25
  28457. o Port it to SunOS 5.9 / Athena
  28458. Changes in version 0.0.8rc2 - 2004-08-20
  28459. o Make it compile on cygwin again.
  28460. o When picking unverified routers, skip those with low uptime and/or
  28461. low bandwidth, depending on what properties you care about.
  28462. Changes in version 0.0.8rc1 - 2004-08-18
  28463. o Changes from 0.0.7.3:
  28464. - Bugfixes:
  28465. - Fix assert triggers: if the other side returns an address 0.0.0.0,
  28466. don't put it into the client dns cache.
  28467. - If a begin failed due to exit policy, but we believe the IP address
  28468. should have been allowed, switch that router to exitpolicy reject *:*
  28469. until we get our next directory.
  28470. - Features:
  28471. - Clients choose nodes proportional to advertised bandwidth.
  28472. - Avoid using nodes with low uptime as introduction points.
  28473. - Handle servers with dynamic IP addresses: don't replace
  28474. options->Address with the resolved one at startup, and
  28475. detect our address right before we make a routerinfo each time.
  28476. - 'FascistFirewall' option to pick dirservers and ORs on specific
  28477. ports; plus 'FirewallPorts' config option to tell FascistFirewall
  28478. which ports are open. (Defaults to 80,443)
  28479. - Be more aggressive about trying to make circuits when the network
  28480. has changed (e.g. when you unsuspend your laptop).
  28481. - Check for time skew on http headers; report date in response to
  28482. "GET /".
  28483. - If the entrynode config line has only one node, don't pick it as
  28484. an exitnode.
  28485. - Add strict{entry|exit}nodes config options. If set to 1, then
  28486. we refuse to build circuits that don't include the specified entry
  28487. or exit nodes.
  28488. - OutboundBindAddress config option, to bind to a specific
  28489. IP address for outgoing connect()s.
  28490. - End truncated log entries (e.g. directories) with "[truncated]".
  28491. o Patches to 0.0.8preX:
  28492. - Bugfixes:
  28493. - Patches to compile and run on win32 again (maybe)?
  28494. - Fix crash when looking for ~/.torrc with no $HOME set.
  28495. - Fix a race bug in the unit tests.
  28496. - Handle verified/unverified name collisions better when new
  28497. routerinfo's arrive in a directory.
  28498. - Sometimes routers were getting entered into the stats before
  28499. we'd assigned their identity_digest. Oops.
  28500. - Only pick and establish intro points after we've gotten a
  28501. directory.
  28502. - Features:
  28503. - AllowUnverifiedNodes config option to let circuits choose no-name
  28504. routers in entry,middle,exit,introduction,rendezvous positions.
  28505. Allow middle and rendezvous positions by default.
  28506. - Add a man page for tor-resolve.
  28507. Changes in version 0.0.7.3 - 2004-08-12
  28508. o Stop dnsworkers from triggering an assert failure when you
  28509. ask them to resolve the host "".
  28510. Changes in version 0.0.8pre3 - 2004-08-09
  28511. o Changes from 0.0.7.2:
  28512. - Allow multiple ORs with same nickname in routerlist -- now when
  28513. people give us one identity key for a nickname, then later
  28514. another, we don't constantly complain until the first expires.
  28515. - Remember used bandwidth (both in and out), and publish 15-minute
  28516. snapshots for the past day into our descriptor.
  28517. - You can now fetch $DIRURL/running-routers to get just the
  28518. running-routers line, not the whole descriptor list. (But
  28519. clients don't use this yet.)
  28520. - When people mistakenly use Tor as an http proxy, point them
  28521. at the tor-doc.html rather than the INSTALL.
  28522. - Remove our mostly unused -- and broken -- hex_encode()
  28523. function. Use base16_encode() instead. (Thanks to Timo Lindfors
  28524. for pointing out this bug.)
  28525. - Rotate onion keys every 12 hours, not every 2 hours, so we have
  28526. fewer problems with people using the wrong key.
  28527. - Change the default exit policy to reject the default edonkey,
  28528. kazaa, gnutella ports.
  28529. - Add replace_file() to util.[ch] to handle win32's rename().
  28530. o Changes from 0.0.8preX:
  28531. - Fix two bugs in saving onion keys to disk when rotating, so
  28532. hopefully we'll get fewer people using old onion keys.
  28533. - Fix an assert error that was making SocksPolicy not work.
  28534. - Be willing to expire routers that have an open dirport -- it's
  28535. just the authoritative dirservers we want to not forget.
  28536. - Reject tor-resolve requests for .onion addresses early, so we
  28537. don't build a whole rendezvous circuit and then fail.
  28538. - When you're warning a server that he's unverified, don't cry
  28539. wolf unpredictably.
  28540. - Fix a race condition: don't try to extend onto a connection
  28541. that's still handshaking.
  28542. - For servers in clique mode, require the conn to be open before
  28543. you'll choose it for your path.
  28544. - Fix some cosmetic bugs about duplicate mark-for-close, lack of
  28545. end relay cell, etc.
  28546. - Measure bandwidth capacity over the last 24 hours, not just 12
  28547. - Bugfix: authoritative dirservers were making and signing a new
  28548. directory for each client, rather than reusing the cached one.
  28549. Changes in version 0.0.8pre2 - 2004-08-04
  28550. o Changes from 0.0.7.2:
  28551. - Security fixes:
  28552. - Check directory signature _before_ you decide whether you're
  28553. you're running an obsolete version and should exit.
  28554. - Check directory signature _before_ you parse the running-routers
  28555. list to decide who's running or verified.
  28556. - Bugfixes and features:
  28557. - Check return value of fclose while writing to disk, so we don't
  28558. end up with broken files when servers run out of disk space.
  28559. - Log a warning if the user uses an unsafe socks variant, so people
  28560. are more likely to learn about privoxy or socat.
  28561. - Dirservers now include RFC1123-style dates in the HTTP headers,
  28562. which one day we will use to better detect clock skew.
  28563. o Changes from 0.0.8pre1:
  28564. - Make it compile without warnings again on win32.
  28565. - Log a warning if you're running an unverified server, to let you
  28566. know you might want to get it verified.
  28567. - Only pick a default nickname if you plan to be a server.
  28568. Changes in version 0.0.8pre1 - 2004-07-23
  28569. o Bugfixes:
  28570. - Made our unit tests compile again on OpenBSD 3.5, and tor
  28571. itself compile again on OpenBSD on a sparc64.
  28572. - We were neglecting milliseconds when logging on win32, so
  28573. everything appeared to happen at the beginning of each second.
  28574. o Protocol changes:
  28575. - 'Extend' relay cell payloads now include the digest of the
  28576. intended next hop's identity key. Now we can verify that we're
  28577. extending to the right router, and also extend to routers we
  28578. hadn't heard of before.
  28579. o Features:
  28580. - Tor nodes can now act as relays (with an advertised ORPort)
  28581. without being manually verified by the dirserver operators.
  28582. - Uploaded descriptors of unverified routers are now accepted
  28583. by the dirservers, and included in the directory.
  28584. - Verified routers are listed by nickname in the running-routers
  28585. list; unverified routers are listed as "$<fingerprint>".
  28586. - We now use hash-of-identity-key in most places rather than
  28587. nickname or addr:port, for improved security/flexibility.
  28588. - To avoid Sybil attacks, paths still use only verified servers.
  28589. But now we have a chance to play around with hybrid approaches.
  28590. - Nodes track bandwidth usage to estimate capacity (not used yet).
  28591. - ClientOnly option for nodes that never want to become servers.
  28592. - Directory caching.
  28593. - "AuthoritativeDir 1" option for the official dirservers.
  28594. - Now other nodes (clients and servers) will cache the latest
  28595. directory they've pulled down.
  28596. - They can enable their DirPort to serve it to others.
  28597. - Clients will pull down a directory from any node with an open
  28598. DirPort, and check the signature/timestamp correctly.
  28599. - Authoritative dirservers now fetch directories from other
  28600. authdirservers, to stay better synced.
  28601. - Running-routers list tells who's down also, along with noting
  28602. if they're verified (listed by nickname) or unverified (listed
  28603. by hash-of-key).
  28604. - Allow dirservers to serve running-router list separately.
  28605. This isn't used yet.
  28606. - ORs connect-on-demand to other ORs
  28607. - If you get an extend cell to an OR you're not connected to,
  28608. connect, handshake, and forward the create cell.
  28609. - The authoritative dirservers stay connected to everybody,
  28610. and everybody stays connected to 0.0.7 servers, but otherwise
  28611. clients/servers expire unused connections after 5 minutes.
  28612. - When servers get a sigint, they delay 30 seconds (refusing new
  28613. connections) then exit. A second sigint causes immediate exit.
  28614. - File and name management:
  28615. - Look for .torrc if no CONFDIR "torrc" is found.
  28616. - If no datadir is defined, then choose, make, and secure ~/.tor
  28617. as datadir.
  28618. - If torrc not found, exitpolicy reject *:*.
  28619. - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
  28620. - If no nickname is defined, derive default from hostname.
  28621. - Rename secret key files, e.g. identity.key -> secret_id_key,
  28622. to discourage people from mailing their identity key to tor-ops.
  28623. - Refuse to build a circuit before the directory has arrived --
  28624. it won't work anyway, since you won't know the right onion keys
  28625. to use.
  28626. - Try other dirservers immediately if the one you try is down. This
  28627. should tolerate down dirservers better now.
  28628. - Parse tor version numbers so we can do an is-newer-than check
  28629. rather than an is-in-the-list check.
  28630. - New socks command 'resolve', to let us shim gethostbyname()
  28631. locally.
  28632. - A 'tor_resolve' script to access the socks resolve functionality.
  28633. - A new socks-extensions.txt doc file to describe our
  28634. interpretation and extensions to the socks protocols.
  28635. - Add a ContactInfo option, which gets published in descriptor.
  28636. - Publish OR uptime in descriptor (and thus in directory) too.
  28637. - Write tor version at the top of each log file
  28638. - New docs in the tarball:
  28639. - tor-doc.html.
  28640. - Document that you should proxy your SSL traffic too.
  28641. Changes in version 0.0.7.2 - 2004-07-07
  28642. o A better fix for the 0.0.0.0 problem, that will hopefully
  28643. eliminate the remaining related assertion failures.
  28644. Changes in version 0.0.7.1 - 2004-07-04
  28645. o When an address resolves to 0.0.0.0, treat it as a failed resolve,
  28646. since internally we use 0.0.0.0 to signify "not yet resolved".
  28647. Changes in version 0.0.7 - 2004-06-07
  28648. o Updated the man page to reflect the new features.
  28649. Changes in version 0.0.7rc2 - 2004-06-06
  28650. o Changes from 0.0.7rc1:
  28651. - Make it build on Win32 again.
  28652. o Changes from 0.0.6.2:
  28653. - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
  28654. settings too.
  28655. Changes in version 0.0.7rc1 - 2004-06-02
  28656. o Bugfixes:
  28657. - On sighup, we were adding another log without removing the first
  28658. one. So log messages would get duplicated n times for n sighups.
  28659. - Several cases of using a connection after we'd freed it. The
  28660. problem was that connections that are pending resolve are in both
  28661. the pending_resolve tree, and also the circuit's resolving_streams
  28662. list. When you want to remove one, you must remove it from both.
  28663. - Fix a double-mark-for-close where an end cell arrived for a
  28664. resolving stream, and then the resolve failed.
  28665. - Check directory signatures based on name of signer, not on whom
  28666. we got the directory from. This will let us cache directories more
  28667. easily.
  28668. o Features:
  28669. - Crank up some of our constants to handle more users.
  28670. Changes in version 0.0.7pre1 - 2004-06-02
  28671. o Fixes for crashes and other obnoxious bugs:
  28672. - Fix an epipe bug: sometimes when directory connections failed
  28673. to connect, we would give them a chance to flush before closing
  28674. them.
  28675. - When we detached from a circuit because of resolvefailed, we
  28676. would immediately try the same circuit twice more, and then
  28677. give up on the resolve thinking we'd tried three different
  28678. exit nodes.
  28679. - Limit the number of intro circuits we'll attempt to build for a
  28680. hidden service per 15-minute period.
  28681. - Check recommended-software string *early*, before actually parsing
  28682. the directory. Thus we can detect an obsolete version and exit,
  28683. even if the new directory format doesn't parse.
  28684. o Fixes for security bugs:
  28685. - Remember which nodes are dirservers when you startup, and if a
  28686. random OR enables his dirport, don't automatically assume he's
  28687. a trusted dirserver.
  28688. o Other bugfixes:
  28689. - Directory connections were asking the wrong poll socket to
  28690. start writing, and not asking themselves to start writing.
  28691. - When we detached from a circuit because we sent a begin but
  28692. didn't get a connected, we would use it again the first time;
  28693. but after that we would correctly switch to a different one.
  28694. - Stop warning when the first onion decrypt attempt fails; they
  28695. will sometimes legitimately fail now that we rotate keys.
  28696. - Override unaligned-access-ok check when $host_cpu is ia64 or
  28697. arm. Apparently they allow it but the kernel whines.
  28698. - Dirservers try to reconnect periodically too, in case connections
  28699. have failed.
  28700. - Fix some memory leaks in directory servers.
  28701. - Allow backslash in Win32 filenames.
  28702. - Made Tor build complain-free on FreeBSD, hopefully without
  28703. breaking other BSD builds. We'll see.
  28704. o Features:
  28705. - Doxygen markup on all functions and global variables.
  28706. - Make directory functions update routerlist, not replace it. So
  28707. now directory disagreements are not so critical a problem.
  28708. - Remove the upper limit on number of descriptors in a dirserver's
  28709. directory (not that we were anywhere close).
  28710. - Allow multiple logfiles at different severity ranges.
  28711. - Allow *BindAddress to specify ":port" rather than setting *Port
  28712. separately. Allow multiple instances of each BindAddress config
  28713. option, so you can bind to multiple interfaces if you want.
  28714. - Allow multiple exit policy lines, which are processed in order.
  28715. Now we don't need that huge line with all the commas in it.
  28716. - Enable accept/reject policies on SOCKS connections, so you can bind
  28717. to 0.0.0.0 but still control who can use your OP.
  28718. Changes in version 0.0.6.2 - 2004-05-16
  28719. o Our integrity-checking digest was checking only the most recent cell,
  28720. not the previous cells like we'd thought.
  28721. Thanks to Stefan Mark for finding the flaw!
  28722. Changes in version 0.0.6.1 - 2004-05-06
  28723. o Fix two bugs in our AES counter-mode implementation (this affected
  28724. onion-level stream encryption, but not TLS-level). It turns
  28725. out we were doing something much more akin to a 16-character
  28726. polyalphabetic cipher. Oops.
  28727. Thanks to Stefan Mark for finding the flaw!
  28728. o Retire moria3 as a directory server, and add tor26 as a directory
  28729. server.
  28730. Changes in version 0.0.6 - 2004-05-02
  28731. [version bump only]
  28732. Changes in version 0.0.6rc4 - 2004-05-01
  28733. o Update the built-in dirservers list to use the new directory format
  28734. o Fix a rare seg fault: if a node offering a hidden service attempts
  28735. to build a circuit to Alice's rendezvous point and fails before it
  28736. reaches the last hop, it retries with a different circuit, but
  28737. then dies.
  28738. o Handle windows socket errors correctly.
  28739. Changes in version 0.0.6rc3 - 2004-04-28
  28740. o Don't expire non-general excess circuits (if we had enough
  28741. circuits open, we were expiring rendezvous circuits -- even
  28742. when they had a stream attached. oops.)
  28743. o Fetch randomness from /dev/urandom better (not via fopen/fread)
  28744. o Better debugging for tls errors
  28745. o Some versions of openssl have an SSL_pending function that erroneously
  28746. returns bytes when there is a non-application record pending.
  28747. o Set Content-Type on the directory and hidserv descriptor.
  28748. o Remove IVs from cipher code, since AES-ctr has none.
  28749. o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
  28750. o We were using an array of length zero in a few places.
  28751. o win32's gethostbyname can't resolve an IP to an IP.
  28752. o win32's close can't close a socket.
  28753. Changes in version 0.0.6rc2 - 2004-04-26
  28754. o Fix a bug where we were closing tls connections intermittently.
  28755. It turns out openssl keeps its errors around -- so if an error
  28756. happens, and you don't ask about it, and then another openssl
  28757. operation happens and succeeds, and you ask if there was an error,
  28758. it tells you about the first error. Fun fun.
  28759. o Fix a bug that's been lurking since 27 may 03 (!)
  28760. When passing back a destroy cell, we would use the wrong circ id.
  28761. 'Mostly harmless', but still worth fixing.
  28762. o Since we don't support truncateds much, don't bother sending them;
  28763. just close the circ.
  28764. o check for <machine/limits.h> so we build on NetBSD again (I hope).
  28765. o don't crash if a conn that sent a begin has suddenly lost its circuit
  28766. (this was quite rare).
  28767. Changes in version 0.0.6rc1 - 2004-04-25
  28768. o We now rotate link (tls context) keys and onion keys.
  28769. o CREATE cells now include oaep padding, so you can tell
  28770. if you decrypted them correctly.
  28771. o Add bandwidthburst to server descriptor.
  28772. o Directories now say which dirserver signed them.
  28773. o Use a tor_assert macro that logs failed assertions too.
  28774. Changes in version 0.0.6pre5 - 2004-04-18
  28775. o changes from 0.0.6pre4:
  28776. - make tor build on broken freebsd 5.2 installs
  28777. - fix a failed assert when you try an intro point, get a nack, and try
  28778. a second one and it works.
  28779. - when alice uses a port that the hidden service doesn't accept,
  28780. it now sends back an end cell (denied by exit policy). otherwise
  28781. alice would just have to wait to time out.
  28782. - fix another rare bug: when we had tried all the intro
  28783. points for a hidden service, we fetched the descriptor
  28784. again, but we left our introcirc thinking it had already
  28785. sent an intro, so it kept waiting for a response...
  28786. - bugfix: when you sleep your hidden-service laptop, as soon
  28787. as it wakes up it tries to upload a service descriptor, but
  28788. socketpair fails for some reason (localhost not up yet?).
  28789. now we simply give up on that upload, and we'll try again later.
  28790. i'd still like to find the bug though.
  28791. - if an intro circ waiting for an ack dies before getting one, then
  28792. count it as a nack
  28793. - we were reusing stale service descriptors and refetching usable
  28794. ones. oops.
  28795. Changes in version 0.0.6pre4 - 2004-04-14
  28796. o changes from 0.0.6pre3:
  28797. - when bob fails to connect to the rendezvous point, and his
  28798. circ didn't fail because of the rendezvous point itself, then
  28799. he retries a couple of times
  28800. - we expire introduction and rendezvous circs more thoroughly
  28801. (sometimes they were hanging around forever)
  28802. - we expire unattached rendezvous streams that have been around
  28803. too long (they were sticking around forever).
  28804. - fix a measly fencepost error that was crashing everybody with
  28805. a strict glibc.
  28806. Changes in version 0.0.6pre3 - 2004-04-14
  28807. o changes from 0.0.6pre2:
  28808. - make hup work again
  28809. - fix some memory leaks for dirservers
  28810. - allow more skew in rendezvous descriptor timestamps, to help
  28811. handle people like blanu who don't know what time it is
  28812. - normal circs are 3 hops, but some rend/intro circs are 4, if
  28813. the initiator doesn't get to choose the last hop
  28814. - send acks for introductions, so alice can know whether to try
  28815. again
  28816. - bob publishes intro points more correctly
  28817. o changes from 0.0.5:
  28818. - fix an assert trigger that's been plaguing us since the days
  28819. of 0.0.2prexx (thanks weasel!)
  28820. - retry stream correctly when we fail to connect because of
  28821. exit-policy-reject (should try another) or can't-resolve-address
  28822. (also should try another, because dns on random internet servers
  28823. is flaky).
  28824. - when we hup a dirserver and we've *removed* a server from the
  28825. approved-routers list, now we remove that server from the
  28826. in-memory directories too
  28827. Changes in version 0.0.6pre2 - 2004-04-08
  28828. o We fixed our base32 implementation. Now it works on all architectures.
  28829. Changes in version 0.0.6pre1 - 2004-04-08
  28830. o Features:
  28831. - Hidden services and rendezvous points are implemented. Go to
  28832. http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
  28833. hidden services. (This only works via a socks4a proxy such as
  28834. Privoxy, and currently it's quite slow.)
  28835. Changes in version 0.0.5 - 2004-03-30
  28836. [version bump only]
  28837. Changes in version 0.0.5rc3 - 2004-03-29
  28838. o Install torrc as torrc.sample -- we no longer clobber your
  28839. torrc. (Woo!)
  28840. o Re-enable recommendedversion checking (we broke it in rc2, oops)
  28841. o Add in a 'notice' log level for things the operator should hear
  28842. but that aren't warnings
  28843. Changes in version 0.0.5rc2 - 2004-03-29
  28844. o Hold socks connection open until reply is flushed (if possible)
  28845. o Make exit nodes resolve IPs to IPs immediately, rather than asking
  28846. the dns farm to do it.
  28847. o Fix c99 aliasing warnings in rephist.c
  28848. o Don't include server descriptors that are older than 24 hours in the
  28849. directory.
  28850. o Give socks 'reject' replies their whole 15s to attempt to flush,
  28851. rather than seeing the 60s timeout and assuming the flush had failed.
  28852. o Clean automake droppings from the cvs repository
  28853. Changes in version 0.0.5rc1 - 2004-03-28
  28854. o Fix mangled-state bug in directory fetching (was causing sigpipes).
  28855. o Only build circuits after we've fetched the directory: clients were
  28856. using only the directory servers before they'd fetched a directory.
  28857. This also means longer startup time; so it goes.
  28858. o Fix an assert trigger where an OP would fail to handshake, and we'd
  28859. expect it to have a nickname.
  28860. o Work around a tsocks bug: do a socks reject when AP connection dies
  28861. early, else tsocks goes into an infinite loop.
  28862. Changes in version 0.0.4 - 2004-03-26
  28863. o When connecting to a dirserver or OR and the network is down,
  28864. we would crash.
  28865. Changes in version 0.0.3 - 2004-03-26
  28866. o Warn and fail if server chose a nickname with illegal characters
  28867. o Port to Solaris and Sparc:
  28868. - include missing header fcntl.h
  28869. - have autoconf find -lsocket -lnsl automatically
  28870. - deal with hardware word alignment
  28871. - make uname() work (solaris has a different return convention)
  28872. - switch from using signal() to sigaction()
  28873. o Preliminary work on reputation system:
  28874. - Keep statistics on success/fail of connect attempts; they're published
  28875. by kill -USR1 currently.
  28876. - Add a RunTesting option to try to learn link state by creating test
  28877. circuits, even when SocksPort is off.
  28878. - Remove unused open circuits when there are too many.
  28879. Changes in version 0.0.2 - 2004-03-19
  28880. - Include strlcpy and strlcat for safer string ops
  28881. - define INADDR_NONE so we compile (but still not run) on solaris
  28882. Changes in version 0.0.2pre27 - 2004-03-14
  28883. o Bugfixes:
  28884. - Allow internal tor networks (we were rejecting internal IPs,
  28885. now we allow them if they're set explicitly).
  28886. - And fix a few endian issues.
  28887. Changes in version 0.0.2pre26 - 2004-03-14
  28888. o New features:
  28889. - If a stream times out after 15s without a connected cell, don't
  28890. try that circuit again: try a new one.
  28891. - Retry streams at most 4 times. Then give up.
  28892. - When a dirserver gets a descriptor from an unknown router, it
  28893. logs its fingerprint (so the dirserver operator can choose to
  28894. accept it even without mail from the server operator).
  28895. - Inform unapproved servers when we reject their descriptors.
  28896. - Make tor build on Windows again. It works as a client, who knows
  28897. about as a server.
  28898. - Clearer instructions in the torrc for how to set up a server.
  28899. - Be more efficient about reading fd's when our global token bucket
  28900. (used for rate limiting) becomes empty.
  28901. o Bugfixes:
  28902. - Stop asserting that computers always go forward in time. It's
  28903. simply not true.
  28904. - When we sent a cell (e.g. destroy) and then marked an OR connection
  28905. expired, we might close it before finishing a flush if the other
  28906. side isn't reading right then.
  28907. - Don't allow dirservers to start if they haven't defined
  28908. RecommendedVersions
  28909. - We were caching transient dns failures. Oops.
  28910. - Prevent servers from publishing an internal IP as their address.
  28911. - Address a strcat vulnerability in circuit.c
  28912. Changes in version 0.0.2pre25 - 2004-03-04
  28913. o New features:
  28914. - Put the OR's IP in its router descriptor, not its fqdn. That way
  28915. we'll stop being stalled by gethostbyname for nodes with flaky dns,
  28916. e.g. poblano.
  28917. o Bugfixes:
  28918. - If the user typed in an address that didn't resolve, the server
  28919. crashed.
  28920. Changes in version 0.0.2pre24 - 2004-03-03
  28921. o Bugfixes:
  28922. - Fix an assertion failure in dns.c, where we were trying to dequeue
  28923. a pending dns resolve even if it wasn't pending
  28924. - Fix a spurious socks5 warning about still trying to write after the
  28925. connection is finished.
  28926. - Hold certain marked_for_close connections open until they're finished
  28927. flushing, rather than losing bytes by closing them too early.
  28928. - Correctly report the reason for ending a stream
  28929. - Remove some duplicate calls to connection_mark_for_close
  28930. - Put switch_id and start_daemon earlier in the boot sequence, so it
  28931. will actually try to chdir() to options.DataDirectory
  28932. - Make 'make test' exit(1) if a test fails; fix some unit tests
  28933. - Make tor fail when you use a config option it doesn't know about,
  28934. rather than warn and continue.
  28935. - Make --version work
  28936. - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
  28937. Changes in version 0.0.2pre23 - 2004-02-29
  28938. o New features:
  28939. - Print a statement when the first circ is finished, so the user
  28940. knows it's working.
  28941. - If a relay cell is unrecognized at the end of the circuit,
  28942. send back a destroy. (So attacks to mutate cells are more
  28943. clearly thwarted.)
  28944. - New config option 'excludenodes' to avoid certain nodes for circuits.
  28945. - When it daemonizes, it chdir's to the DataDirectory rather than "/",
  28946. so you can collect coredumps there.
  28947. o Bugfixes:
  28948. - Fix a bug in tls flushing where sometimes data got wedged and
  28949. didn't flush until more data got sent. Hopefully this bug was
  28950. a big factor in the random delays we were seeing.
  28951. - Make 'connected' cells include the resolved IP, so the client
  28952. dns cache actually gets populated.
  28953. - Disallow changing from ORPort=0 to ORPort>0 on hup.
  28954. - When we time-out on a stream and detach from the circuit, send an
  28955. end cell down it first.
  28956. - Only warn about an unknown router (in exitnodes, entrynodes,
  28957. excludenodes) after we've fetched a directory.
  28958. Changes in version 0.0.2pre22 - 2004-02-26
  28959. o New features:
  28960. - Servers publish less revealing uname information in descriptors.
  28961. - More memory tracking and assertions, to crash more usefully when
  28962. errors happen.
  28963. - If the default torrc isn't there, just use some default defaults.
  28964. Plus provide an internal dirservers file if they don't have one.
  28965. - When the user tries to use Tor as an http proxy, give them an http
  28966. 501 failure explaining that we're a socks proxy.
  28967. - Dump a new router.desc on hup, to help confused people who change
  28968. their exit policies and then wonder why router.desc doesn't reflect
  28969. it.
  28970. - Clean up the generic tor.sh init script that we ship with.
  28971. o Bugfixes:
  28972. - If the exit stream is pending on the resolve, and a destroy arrives,
  28973. then the stream wasn't getting removed from the pending list. I
  28974. think this was the one causing recent server crashes.
  28975. - Use a more robust poll on OSX 10.3, since their poll is flaky.
  28976. - When it couldn't resolve any dirservers, it was useless from then on.
  28977. Now it reloads the RouterFile (or default dirservers) if it has no
  28978. dirservers.
  28979. - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
  28980. many users don't even *have* a /usr/local/sbin/.
  28981. Changes in version 0.0.2pre21 - 2004-02-18
  28982. o New features:
  28983. - There's a ChangeLog file that actually reflects the changelog.
  28984. - There's a 'torify' wrapper script, with an accompanying
  28985. tor-tsocks.conf, that simplifies the process of using tsocks for
  28986. tor. It even has a man page.
  28987. - The tor binary gets installed to sbin rather than bin now.
  28988. - Retry streams where the connected cell hasn't arrived in 15 seconds
  28989. - Clean up exit policy handling -- get the default out of the torrc,
  28990. so we can update it without forcing each server operator to fix
  28991. his/her torrc.
  28992. - Allow imaps and pop3s in default exit policy
  28993. o Bugfixes:
  28994. - Prevent picking middleman nodes as the last node in the circuit
  28995. Changes in version 0.0.2pre20 - 2004-01-30
  28996. o New features:
  28997. - We now have a deb package, and it's in debian unstable. Go to
  28998. it, apt-getters. :)
  28999. - I've split the TotalBandwidth option into BandwidthRate (how many
  29000. bytes per second you want to allow, long-term) and
  29001. BandwidthBurst (how many bytes you will allow at once before the cap
  29002. kicks in). This better token bucket approach lets you, say, set
  29003. BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
  29004. performance while not exceeding your monthly bandwidth quota.
  29005. - Push out a tls record's worth of data once you've got it, rather
  29006. than waiting until you've read everything waiting to be read. This
  29007. may improve performance by pipelining better. We'll see.
  29008. - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
  29009. from failed circuits (if they haven't been connected yet) and attach
  29010. to new ones.
  29011. - Expire old streams that haven't managed to connect. Some day we'll
  29012. have them reattach to new circuits instead.
  29013. o Bugfixes:
  29014. - Fix several memory leaks that were causing servers to become bloated
  29015. after a while.
  29016. - Fix a few very rare assert triggers. A few more remain.
  29017. - Setuid to User _before_ complaining about running as root.
  29018. Changes in version 0.0.2pre19 - 2004-01-07
  29019. o Bugfixes:
  29020. - Fix deadlock condition in dns farm. We were telling a child to die by
  29021. closing the parent's file descriptor to him. But newer children were
  29022. inheriting the open file descriptor from the parent, and since they
  29023. weren't closing it, the socket never closed, so the child never read
  29024. eof, so he never knew to exit. Similarly, dns workers were holding
  29025. open other sockets, leading to all sorts of chaos.
  29026. - New cleaner daemon() code for forking and backgrounding.
  29027. - If you log to a file, it now prints an entry at the top of the
  29028. logfile so you know it's working.
  29029. - The onionskin challenge length was 30 bytes longer than necessary.
  29030. - Started to patch up the spec so it's not quite so out of date.
  29031. Changes in version 0.0.2pre18 - 2004-01-02
  29032. o Bugfixes:
  29033. - Fix endian issues with the 'integrity' field in the relay header.
  29034. - Fix a potential bug where connections in state
  29035. AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
  29036. Changes in version 0.0.2pre17 - 2003-12-30
  29037. o Bugfixes:
  29038. - Made --debuglogfile (or any second log file, actually) work.
  29039. - Resolved an edge case in get_unique_circ_id_by_conn where a smart
  29040. adversary could force us into an infinite loop.
  29041. o Features:
  29042. - Each onionskin handshake now includes a hash of the computed key,
  29043. to prove the server's identity and help perfect forward secrecy.
  29044. - Changed cell size from 256 to 512 bytes (working toward compatibility
  29045. with MorphMix).
  29046. - Changed cell length to 2 bytes, and moved it to the relay header.
  29047. - Implemented end-to-end integrity checking for the payloads of
  29048. relay cells.
  29049. - Separated streamid from 'recognized' (otherwise circuits will get
  29050. messed up when we try to have streams exit from the middle). We
  29051. use the integrity-checking to confirm that a cell is addressed to
  29052. this hop.
  29053. - Randomize the initial circid and streamid values, so an adversary who
  29054. breaks into a node can't learn how many circuits or streams have
  29055. been made so far.
  29056. Changes in version 0.0.2pre16 - 2003-12-14
  29057. o Bugfixes:
  29058. - Fixed a bug that made HUP trigger an assert
  29059. - Fixed a bug where a circuit that immediately failed wasn't being
  29060. counted as a failed circuit in counting retries.
  29061. o Features:
  29062. - Now we close the circuit when we get a truncated cell: otherwise we're
  29063. open to an anonymity attack where a bad node in the path truncates
  29064. the circuit and then we open streams at him.
  29065. - Add port ranges to exit policies
  29066. - Add a conservative default exit policy
  29067. - Warn if you're running tor as root
  29068. - on HUP, retry OR connections and close/rebind listeners
  29069. - options.EntryNodes: try these nodes first when picking the first node
  29070. - options.ExitNodes: if your best choices happen to include any of
  29071. your preferred exit nodes, you choose among just those preferred
  29072. exit nodes.
  29073. - options.ExcludedNodes: nodes that are never picked in path building
  29074. Changes in version 0.0.2pre15 - 2003-12-03
  29075. o Robustness and bugfixes:
  29076. - Sometimes clients would cache incorrect DNS resolves, which would
  29077. really screw things up.
  29078. - An OP that goes offline would slowly leak all its sockets and stop
  29079. working.
  29080. - A wide variety of bugfixes in exit node selection, exit policy
  29081. handling, and processing pending streams when a new circuit is
  29082. established.
  29083. - Pick nodes for a path only from those the directory says are up
  29084. - Choose randomly from all running dirservers, not always the first one
  29085. - Increase allowed http header size for directory fetch.
  29086. - Stop writing to stderr (if we're daemonized it will be closed).
  29087. - Enable -g always, so cores will be more useful to me.
  29088. - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
  29089. o Documentation:
  29090. - Wrote a man page. It lists commonly used options.
  29091. o Configuration:
  29092. - Change default loglevel to warn.
  29093. - Make PidFile default to null rather than littering in your CWD.
  29094. - OnionRouter config option is now obsolete. Instead it just checks
  29095. ORPort>0.
  29096. - Moved to a single unified torrc file for both clients and servers.
  29097. Changes in version 0.0.2pre14 - 2003-11-29
  29098. o Robustness and bugfixes:
  29099. - Force the admin to make the DataDirectory himself
  29100. - to get ownership/permissions right
  29101. - so clients no longer make a DataDirectory and then never use it
  29102. - fix bug where a client who was offline for 45 minutes would never
  29103. pull down a directory again
  29104. - fix (or at least hide really well) the dns assert bug that was
  29105. causing server crashes
  29106. - warnings and improved robustness wrt clockskew for certs
  29107. - use the native daemon(3) to daemonize, when available
  29108. - exit if bind() fails
  29109. - exit if neither socksport nor orport is defined
  29110. - include our own tor_timegm (Win32 doesn't have its own)
  29111. - bugfix for win32 with lots of connections
  29112. - fix minor bias in PRNG
  29113. - make dirserver more robust to corrupt cached directory
  29114. o Documentation:
  29115. - Wrote the design document (woo)
  29116. o Circuit building and exit policies:
  29117. - Circuits no longer try to use nodes that the directory has told them
  29118. are down.
  29119. - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
  29120. bitcounts (18.0.0.0/8).
  29121. - Make AP connections standby for a circuit if no suitable circuit
  29122. exists, rather than failing
  29123. - Circuits choose exit node based on addr/port, exit policies, and
  29124. which AP connections are standing by
  29125. - Bump min pathlen from 2 to 3
  29126. - Relay end cells have a payload to describe why the stream ended.
  29127. - If the stream failed because of exit policy, try again with a new
  29128. circuit.
  29129. - Clients have a dns cache to remember resolved addresses.
  29130. - Notice more quickly when we have no working circuits
  29131. o Configuration:
  29132. - APPort is now called SocksPort
  29133. - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
  29134. where to bind
  29135. - RecommendedVersions is now a config variable rather than
  29136. hardcoded (for dirservers)
  29137. - Reloads config on HUP
  29138. - Usage info on -h or --help
  29139. - If you set User and Group config vars, it'll setu/gid to them.
  29140. Changes in version 0.0.2pre13 - 2003-10-19
  29141. o General stability:
  29142. - SSL_write no longer fails when it returns WANTWRITE and the number
  29143. of bytes in the buf has changed by the next SSL_write call.
  29144. - Fix segfault fetching directory when network is down
  29145. - Fix a variety of minor memory leaks
  29146. - Dirservers reload the fingerprints file on HUP, so I don't have
  29147. to take down the network when I approve a new router
  29148. - Default server config file has explicit Address line to specify fqdn
  29149. o Buffers:
  29150. - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
  29151. - Make listener connections not ever alloc bufs
  29152. o Autoconf improvements:
  29153. - don't clobber an external CFLAGS in ./configure
  29154. - Make install now works
  29155. - create var/lib/tor on make install
  29156. - autocreate a tor.sh initscript to help distribs
  29157. - autocreate the torrc and sample-server-torrc with correct paths
  29158. o Log files and Daemonizing now work:
  29159. - If --DebugLogFile is specified, log to it at -l debug
  29160. - If --LogFile is specified, use it instead of commandline
  29161. - If --RunAsDaemon is set, tor forks and backgrounds on startup