ChangeLog 1.1 MB

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  1. Changes in version 0.2.9.5-rc - 2016-1?-??
  2. Changes in version 0.2.8.9 - 2016-10-17
  3. Tor 0.2.8.9 backports a fix for a security hole in previous versions
  4. of Tor that would allow a remote attacker to crash a Tor client,
  5. hidden service, relay, or authority. All Tor users should upgrade to
  6. this version, or to 0.2.9.4-alpha. Patches will be released for older
  7. versions of Tor.
  8. o Major features (security fixes, also in 0.2.9.4-alpha):
  9. - Prevent a class of security bugs caused by treating the contents
  10. of a buffer chunk as if they were a NUL-terminated string. At
  11. least one such bug seems to be present in all currently used
  12. versions of Tor, and would allow an attacker to remotely crash
  13. most Tor instances, especially those compiled with extra compiler
  14. hardening. With this defense in place, such bugs can't crash Tor,
  15. though we should still fix them as they occur. Closes ticket
  16. 20384 (TROVE-2016-10-001).
  17. o Minor features (geoip):
  18. - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
  19. Country database.
  20. Changes in version 0.2.9.4-alpha - 2016-10-17
  21. Tor 0.2.9.4-alpha fixes a security hole in previous versions of Tor
  22. that would allow a remote attacker to crash a Tor client, hidden
  23. service, relay, or authority. All Tor users should upgrade to this
  24. version, or to 0.2.8.9. Patches will be released for older versions
  25. of Tor.
  26. Tor 0.2.9.4-alpha also adds numerous small features and fix-ups to
  27. previous versions of Tor, including the implementation of a feature to
  28. future- proof the Tor ecosystem against protocol changes, some bug
  29. fixes necessary for Tor Browser to use unix domain sockets correctly,
  30. and several portability improvements. We anticipate that this will be
  31. the last alpha in the Tor 0.2.9 series, and that the next release will
  32. be a release candidate.
  33. o Major features (security fixes):
  34. - Prevent a class of security bugs caused by treating the contents
  35. of a buffer chunk as if they were a NUL-terminated string. At
  36. least one such bug seems to be present in all currently used
  37. versions of Tor, and would allow an attacker to remotely crash
  38. most Tor instances, especially those compiled with extra compiler
  39. hardening. With this defense in place, such bugs can't crash Tor,
  40. though we should still fix them as they occur. Closes ticket
  41. 20384 (TROVE-2016-10-001).
  42. o Major features (subprotocol versions):
  43. - Tor directory authorities now vote on a set of recommended
  44. subprotocol versions, and on a set of required subprotocol
  45. versions. Clients and relays that lack support for a _required_
  46. subprotocol version will not start; those that lack support for a
  47. _recommended_ subprotocol version will warn the user to upgrade.
  48. Closes ticket 19958; implements part of proposal 264.
  49. - Tor now uses "subprotocol versions" to indicate compatibility.
  50. Previously, versions of Tor looked at the declared Tor version of
  51. a relay to tell whether they could use a given feature. Now, they
  52. should be able to rely on its declared subprotocol versions. This
  53. change allows compatible implementations of the Tor protocol(s) to
  54. exist without pretending to be 100% bug-compatible with particular
  55. releases of Tor itself. Closes ticket 19958; implements part of
  56. proposal 264.
  57. o Minor feature (fallback directories):
  58. - Remove broken fallbacks from the hard-coded fallback directory
  59. list. Closes ticket 20190; patch by teor.
  60. o Minor features (client, directory):
  61. - Since authorities now omit all routers that lack the Running and
  62. Valid flags, we assume that any relay listed in the consensus must
  63. have those flags. Closes ticket 20001; implements part of
  64. proposal 272.
  65. o Minor features (compilation, portability):
  66. - Compile correctly on MacOS 10.12 (aka "Sierra"). Closes
  67. ticket 20241.
  68. o Minor features (development tools, etags):
  69. - Teach the "make tags" Makefile target how to correctly find
  70. "MOCK_IMPL" function definitions. Patch from nherring; closes
  71. ticket 16869.
  72. o Minor features (geoip):
  73. - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
  74. Country database.
  75. o Minor features (unix domain sockets):
  76. - When configuring a unix domain socket for a SocksPort,
  77. ControlPort, or Hidden service, you can now wrap the address in
  78. quotes, using C-style escapes inside the quotes. This allows unix
  79. domain socket paths to contain spaces.
  80. o Minor features (virtual addresses):
  81. - Increase the maximum number of bits for the IPv6 virtual network
  82. prefix from 16 to 104. In this way, the condition for address
  83. allocation is less restrictive. Closes ticket 20151; feature
  84. on 0.2.4.7-alpha.
  85. o Minor bugfixes (address discovery):
  86. - Stop reordering IP addresses returned by the OS. This makes it
  87. more likely that Tor will guess the same relay IP address every
  88. time. Fixes issue 20163; bugfix on 0.2.7.1-alpha, ticket 17027.
  89. Reported by René Mayrhofer, patch by "cypherpunks".
  90. o Minor bugfixes (client, unix domain sockets):
  91. - Disable IsolateClientAddr when using AF_UNIX backed SocksPorts as
  92. the client address is meaningless. Fixes bug 20261; bugfix
  93. on 0.2.6.3-alpha.
  94. o Minor bugfixes (compilation, OpenBSD):
  95. - Detect Libevent2 functions correctly on systems that provide
  96. libevent2, but where libevent1 is linked with -levent. Fixes bug
  97. 19904; bugfix on 0.2.2.24-alpha. Patch from Rubiate.
  98. o Minor bugfixes (configuration):
  99. - When parsing quoted configuration values from the torrc file,
  100. handle windows line endings correctly. Fixes bug 19167; bugfix on
  101. 0.2.0.16-alpha. Patch from "Pingl".
  102. o Minor bugfixes (getpass):
  103. - Defensively fix a non-triggerable heap corruption at do_getpass()
  104. to protect ourselves from mistakes in the future. Fixes bug
  105. #19223; bugfix on 0.2.7.3-rc. Bug found by Guido Vranken, patch
  106. by nherring.
  107. o Minor bugfixes (hidden service):
  108. - Allow hidden services to run on IPv6 addresses even when the
  109. IPv6Exit option is not set. Fixes bug 18357; bugfix
  110. on 0.2.4.7-alpha.
  111. o Documentation:
  112. - Add module-level internal documentation for 36 C files that
  113. previously didn't have a high-level overview. Closes ticket #20385.
  114. o Required libraries:
  115. - When building with OpenSSL, Tor now requires version 1.0.1 or
  116. later. OpenSSL 1.0.0 and earlier are no longer supported by the
  117. OpenSSL team, and should not be used. Closes ticket 20303.
  118. Changes in version 0.2.9.3-alpha - 2016-09-23
  119. Tor 0.2.9.3-alpha adds improved support for entities that want to make
  120. high-performance services available through the Tor .onion mechanism
  121. without themselves receiving anonymity as they host those services. It
  122. also tries harder to ensure that all steps on a circuit are using the
  123. strongest crypto possible, strengthens some TLS properties, and
  124. resolves several bugs -- including a pair of crash bugs from the 0.2.8
  125. series. Anybody running an earlier version of 0.2.9.x should upgrade.
  126. o Major bugfixes (crash, also in 0.2.8.8):
  127. - Fix a complicated crash bug that could affect Tor clients
  128. configured to use bridges when replacing a networkstatus consensus
  129. in which one of their bridges was mentioned. OpenBSD users saw
  130. more crashes here, but all platforms were potentially affected.
  131. Fixes bug 20103; bugfix on 0.2.8.2-alpha.
  132. o Major bugfixes (relay, OOM handler, also in 0.2.8.8):
  133. - Fix a timing-dependent assertion failure that could occur when we
  134. tried to flush from a circuit after having freed its cells because
  135. of an out-of-memory condition. Fixes bug 20203; bugfix on
  136. 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
  137. this one.
  138. o Major features (circuit building, security):
  139. - Authorities, relays and clients now require ntor keys in all
  140. descriptors, for all hops (except for rare hidden service protocol
  141. cases), for all circuits, and for all other roles. Part of
  142. ticket 19163.
  143. - Tor authorities, relays, and clients only use ntor, except for
  144. rare cases in the hidden service protocol. Part of ticket 19163.
  145. o Major features (single-hop "hidden" services):
  146. - Add experimental HiddenServiceSingleHopMode and
  147. HiddenServiceNonAnonymousMode options. When both are set to 1,
  148. every hidden service on a Tor instance becomes a non-anonymous
  149. Single Onion Service. Single Onions make one-hop (direct)
  150. connections to their introduction and renzedvous points. One-hop
  151. circuits make Single Onion servers easily locatable, but clients
  152. remain location-anonymous. This is compatible with the existing
  153. hidden service implementation, and works on the current tor
  154. network without any changes to older relays or clients. Implements
  155. proposal 260, completes ticket 17178. Patch by teor and asn.
  156. o Major features (resource management):
  157. - Tor can now notice it is about to run out of sockets, and
  158. preemptively close connections of lower priority. (This feature is
  159. off by default for now, since the current prioritizing method is
  160. yet not mature enough. You can enable it by setting
  161. "DisableOOSCheck 0", but watch out: it might close some sockets
  162. you would rather have it keep.) Closes ticket 18640.
  163. o Major bugfixes (circuit building):
  164. - Hidden service client-to-intro-point and service-to-rendezvous-
  165. point cicruits use the TAP key supplied by the protocol, to avoid
  166. epistemic attacks. Fixes bug 19163; bugfix on 0.2.4.18-rc.
  167. o Major bugfixes (compilation, OpenBSD):
  168. - Fix a Libevent-detection bug in our autoconf script that would
  169. prevent Tor from linking successfully on OpenBSD. Patch from
  170. rubiate. Fixes bug 19902; bugfix on 0.2.9.1-alpha.
  171. o Major bugfixes (hidden services):
  172. - Clients now require hidden services to include the TAP keys for
  173. their intro points in the hidden service descriptor. This prevents
  174. an inadvertent upgrade to ntor, which a malicious hidden service
  175. could use to distinguish clients by consensus version. Fixes bug
  176. 20012; bugfix on 0.2.4.8-alpha. Patch by teor.
  177. o Minor features (security, TLS):
  178. - Servers no longer support clients that without AES ciphersuites.
  179. (3DES is no longer considered an acceptable cipher.) We believe
  180. that no such Tor clients currently exist, since Tor has required
  181. OpenSSL 0.9.7 or later since 2009. Closes ticket 19998.
  182. o Minor feature (fallback directories):
  183. - Remove broken entries from the hard-coded fallback directory list.
  184. Closes ticket 20190; patch by teor.
  185. o Minor features (geoip, also in 0.2.8.8):
  186. - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
  187. Country database.
  188. o Minor feature (port flags):
  189. - Add new flags to the *Port options to finer control over which
  190. requests are allowed. The flags are NoDNSRequest, NoOnionTraffic,
  191. and the synthetic flag OnionTrafficOnly, which is equivalent to
  192. NoDNSRequest, NoIPv4Traffic, and NoIPv6Traffic. Closes enhancement
  193. 18693; patch by "teor".
  194. o Minor features (directory authority):
  195. - After voting, if the authorities decide that a relay is not
  196. "Valid", they no longer include it in the consensus at all. Closes
  197. ticket 20002; implements part of proposal 272.
  198. o Minor features (testing):
  199. - Disable memory protections on OpenBSD when performing our unit
  200. tests for memwipe(). The test deliberately invokes undefined
  201. behavior, and the OpenBSD protections interfere with this. Patch
  202. from "rubiate". Closes ticket 20066.
  203. o Minor features (testing, ipv6):
  204. - Add the single-onion and single-onion-ipv6 chutney targets to
  205. "make test-network-all". This requires a recent chutney version
  206. with the single onion network flavours (git c72a652 or later).
  207. Closes ticket 20072; patch by teor.
  208. - Add the hs-ipv6 chutney target to make test-network-all's IPv6
  209. tests. Remove bridges+hs, as it's somewhat redundant. This
  210. requires a recent chutney version that supports IPv6 clients,
  211. relays, and authorities. Closes ticket 20069; patch by teor.
  212. o Minor features (Tor2web):
  213. - Make Tor2web clients respect ReachableAddresses. This feature was
  214. inadvertently enabled in 0.2.8.6, then removed by bugfix 19973 on
  215. 0.2.8.7. Implements feature 20034. Patch by teor.
  216. o Minor features (unit tests):
  217. - We've done significant work to make the unit tests run faster.
  218. - Our link-handshake unit tests now check that when invalid
  219. handshakes fail, they fail with the error messages we expected.
  220. - Our unit testing code that captures log messages no longer
  221. prevents them from being written out if the user asked for them
  222. (by passing --debug or --info or or --notice --warn to the "test"
  223. binary). This change prevents us from missing unexpected log
  224. messages simply because we were looking for others. Related to
  225. ticket 19999.
  226. - The unit tests now log all warning messages with the "BUG" flag.
  227. Previously, they only logged errors by default. This change will
  228. help us make our testing code more correct, and make sure that we
  229. only hit this code when we mean to. In the meantime, however,
  230. there will be more warnings in the unit test logs than before.
  231. This is preparatory work for ticket 19999.
  232. - The unit tests now treat any failure of a "tor_assert_nonfatal()"
  233. assertion as a test failure.
  234. o Minor bug fixes (circuits):
  235. - Use the CircuitBuildTimeout option whenever
  236. LearnCircuitBuildTimeout is disabled. Previously, we would respect
  237. the option when a user disabled it, but not when it was disabled
  238. because some other option was set. Fixes bug 20073; bugfix on
  239. 0.2.4.12-alpha. Patch by teor.
  240. o Minor bugfixes (allocation):
  241. - Change how we allocate memory for large chunks on buffers, to
  242. avoid a (currently impossible) integer overflow, and to waste less
  243. space when allocating unusually large chunks. Fixes bug 20081;
  244. bugfix on 0.2.0.16-alpha. Issue identified by Guido Vranken.
  245. - Always include orconfig.h before including any other C headers.
  246. Sometimes, it includes macros that affect the behavior of the
  247. standard headers. Fixes bug 19767; bugfix on 0.2.9.1-alpha (the
  248. first version to use AC_USE_SYSTEM_EXTENSIONS).
  249. - Fix a syntax error in the IF_BUG_ONCE__() macro in non-GCC-
  250. compatible compilers. Fixes bug 20141; bugfix on 0.2.9.1-alpha.
  251. Patch from Gisle Vanem.
  252. - Stop trying to build with Clang 4.0's -Wthread-safety warnings.
  253. They apparently require a set of annotations that we aren't
  254. currently using, and they create false positives in our pthreads
  255. wrappers. Fixes bug 20110; bugfix on 0.2.9.1-alpha.
  256. o Minor bugfixes (directory authority):
  257. - Die with a more useful error when the operator forgets to place
  258. the authority_signing_key file into the keys directory. This
  259. avoids an uninformative assert & traceback about having an invalid
  260. key. Fixes bug 20065; bugfix on 0.2.0.1-alpha.
  261. - When allowing private addresses, mark Exits that only exit to
  262. private locations as such. Fixes bug 20064; bugfix
  263. on 0.2.2.9-alpha.
  264. o Minor bugfixes (documentation):
  265. - Document the default PathsNeededToBuildCircuits value that's used
  266. by clients when the directory authorities don't set
  267. min_paths_for_circs_pct. Fixes bug 20117; bugfix on 02c320916e02
  268. in tor-0.2.4.10-alpha. Patch by teor, reported by Jesse V.
  269. - Fix manual for the User option: it takes a username, not a UID.
  270. Fixes bug 19122; bugfix on 0.0.2pre16 (the first version to have
  271. a manpage!).
  272. o Minor bugfixes (hidden services):
  273. - Stop logging intro point details to the client log on certain
  274. error conditions. Fixed as part of bug 20012; bugfix on
  275. 0.2.4.8-alpha. Patch by teor.
  276. o Minor bugfixes (IPv6, testing):
  277. - Check for IPv6 correctly on Linux when running test networks.
  278. Fixes bug 19905; bugfix on 0.2.7.3-rc; patch by teor.
  279. o Minor bugfixes (Linux seccomp2 sandbox):
  280. - Add permission to run the sched_yield() and sigaltstack() system
  281. calls, in order to support versions of Tor compiled with asan or
  282. ubsan code that use these calls. Now "sandbox 1" and
  283. "--enable-expensive-hardening" should be compatible on more
  284. systems. Fixes bug 20063; bugfix on 0.2.5.1-alpha.
  285. o Minor bugfixes (logging):
  286. - When logging a message from the BUG() macro, be explicit about
  287. what we were asserting. Previously we were confusing what we were
  288. asserting with what the bug was. Fixes bug 20093; bugfix
  289. on 0.2.9.1-alpha.
  290. - When we are unable to remove the bw_accounting file, do not warn
  291. if the reason we couldn't remove it was that it didn't exist.
  292. Fixes bug 19964; bugfix on 0.2.5.4-alpha. Patch from 'pastly'.
  293. o Minor bugfixes (option parsing):
  294. - Count unix sockets when counting client listeners (SOCKS, Trans,
  295. NATD, and DNS). This has no user-visible behaviour changes: these
  296. options are set once, and never read. Required for correct
  297. behaviour in ticket 17178. Fixes bug 19677; bugfix on
  298. 0.2.6.3-alpha. Patch by teor.
  299. o Minor bugfixes (options):
  300. - Check the consistency of UseEntryGuards and EntryNodes more
  301. reliably. Fixes bug 20074; bugfix on tor- 0.2.4.12-alpha. Patch
  302. by teor.
  303. - Stop changing the configured value of UseEntryGuards on
  304. authorities and Tor2web clients. Fixes bug 20074; bugfix on
  305. commits 51fc6799 in tor-0.1.1.16-rc and acda1735 in tor-0.2.4.3-
  306. alpha. Patch by teor.
  307. o Minor bugfixes (Tor2web):
  308. - Prevent Tor2web clients running hidden services, these services
  309. are not anonymous due to the one-hop client paths. Fixes bug
  310. 19678. Patch by teor.
  311. o Minor bugfixes (unit tests):
  312. - Fix a shared-random unit test that was failing on big endian
  313. architectures due to internal representation of a integer copied
  314. to a buffer. The test is changed to take a full 32 bytes of data
  315. and use the output of a python script that make the COMMIT and
  316. REVEAL calculation according to the spec. Fixes bug 19977; bugfix
  317. on 0.2.9.1-alpha.
  318. - The tor_tls_server_info_callback unit test no longer crashes when
  319. debug-level logging is turned on. Fixes bug 20041; bugfix
  320. on 0.2.8.1-alpha.
  321. Changes in version 0.2.8.8 - 2016-09-23
  322. Tor 0.2.8.8 fixes two crash bugs present in previous versions of the
  323. 0.2.8.x series. Relays running 0.2.8.x should upgrade, as should users
  324. who select public relays as their bridges.
  325. o Major bugfixes (crash):
  326. - Fix a complicated crash bug that could affect Tor clients
  327. configured to use bridges when replacing a networkstatus consensus
  328. in which one of their bridges was mentioned. OpenBSD users saw
  329. more crashes here, but all platforms were potentially affected.
  330. Fixes bug 20103; bugfix on 0.2.8.2-alpha.
  331. o Major bugfixes (relay, OOM handler):
  332. - Fix a timing-dependent assertion failure that could occur when we
  333. tried to flush from a circuit after having freed its cells because
  334. of an out-of-memory condition. Fixes bug 20203; bugfix on
  335. 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
  336. this one.
  337. o Minor feature (fallback directories):
  338. - Remove broken fallbacks from the hard-coded fallback directory
  339. list. Closes ticket 20190; patch by teor.
  340. o Minor features (geoip):
  341. - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
  342. Country database.
  343. Changes in version 0.2.9.2-alpha - 2016-08-24
  344. Tor 0.2.9.2-alpha continues development of the 0.2.9 series with
  345. several new features and bugfixes. It also includes an important
  346. authority update and an important bugfix from 0.2.8.7. Everyone who
  347. sets the ReachableAddresses option, and all bridges, are strongly
  348. encouraged to upgrade to 0.2.8.7, or to 0.2.9.2-alpha.
  349. o Directory authority changes (also in 0.2.8.7):
  350. - The "Tonga" bridge authority has been retired; the new bridge
  351. authority is "Bifroest". Closes tickets 19728 and 19690.
  352. o Major bugfixes (client, security, also in 0.2.8.7):
  353. - Only use the ReachableAddresses option to restrict the first hop
  354. in a path. In earlier versions of 0.2.8.x, it would apply to
  355. every hop in the path, with a possible degradation in anonymity
  356. for anyone using an uncommon ReachableAddress setting. Fixes bug
  357. 19973; bugfix on 0.2.8.2-alpha.
  358. o Major features (user interface):
  359. - Tor now supports the ability to declare options deprecated, so
  360. that we can recommend that people stop using them. Previously,
  361. this was done in an ad-hoc way. Closes ticket 19820.
  362. o Major bugfixes (directory downloads):
  363. - Avoid resetting download status for consensuses hourly, since we
  364. already have another, smarter retry mechanism. Fixes bug 8625;
  365. bugfix on 0.2.0.9-alpha.
  366. o Minor features (config):
  367. - Warn users when descriptor and port addresses are inconsistent.
  368. Mitigates bug 13953; patch by teor.
  369. o Minor features (geoip):
  370. - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
  371. Country database.
  372. o Minor features (user interface):
  373. - There is a new --list-deprecated-options command-line option to
  374. list all of the deprecated options. Implemented as part of
  375. ticket 19820.
  376. o Minor bugfixes (code style):
  377. - Fix an integer signedness conversion issue in the case conversion
  378. tables. Fixes bug 19168; bugfix on 0.2.1.11-alpha.
  379. o Minor bugfixes (compilation):
  380. - Build correctly on versions of libevent2 without support for
  381. evutil_secure_rng_add_bytes(). Fixes bug 19904; bugfix
  382. on 0.2.5.4-alpha.
  383. - Fix a compilation warning on GCC versions before 4.6. Our
  384. ENABLE_GCC_WARNING macro used the word "warning" as an argument,
  385. when it is also required as an argument to the compiler pragma.
  386. Fixes bug 19901; bugfix on 0.2.9.1-alpha.
  387. o Minor bugfixes (compilation, also in 0.2.8.7):
  388. - Remove an inappropriate "inline" in tortls.c that was causing
  389. warnings on older versions of GCC. Fixes bug 19903; bugfix
  390. on 0.2.8.1-alpha.
  391. o Minor bugfixes (fallback directories, also in 0.2.8.7):
  392. - Avoid logging a NULL string pointer when loading fallback
  393. directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
  394. and 0.2.8.1-alpha. Report and patch by "rubiate".
  395. o Minor bugfixes (logging):
  396. - Log a more accurate message when we fail to dump a microdescriptor.
  397. Fixes bug 17758; bugfix on 0.2.2.8-alpha. Patch from Daniel Pinto.
  398. o Minor bugfixes (memory leak):
  399. - Fix a series of slow memory leaks related to parsing torrc files
  400. and options. Fixes bug 19466; bugfix on 0.2.1.6-alpha.
  401. o Deprecated features:
  402. - A number of DNS-cache-related sub-options for client ports are now
  403. deprecated for security reasons, and may be removed in a future
  404. version of Tor. (We believe that client-side DNS cacheing is a bad
  405. idea for anonymity, and you should not turn it on.) The options
  406. are: CacheDNS, CacheIPv4DNS, CacheIPv6DNS, UseDNSCache,
  407. UseIPv4Cache, and UseIPv6Cache.
  408. - A number of options are deprecated for security reasons, and may
  409. be removed in a future version of Tor. The options are:
  410. AllowDotExit, AllowInvalidNodes, AllowSingleHopCircuits,
  411. AllowSingleHopExits, ClientDNSRejectInternalAddresses,
  412. CloseHSClientCircuitsImmediatelyOnTimeout,
  413. CloseHSServiceRendCircuitsImmediatelyOnTimeout,
  414. ExcludeSingleHopRelays, FastFirstHopPK, TLSECGroup,
  415. UseNTorHandshake, and WarnUnsafeSocks.
  416. - The *ListenAddress options are now deprecated as unnecessary: the
  417. corresponding *Port options should be used instead. These options
  418. may someday be removed. The affected options are:
  419. ControlListenAddress, DNSListenAddress, DirListenAddress,
  420. NATDListenAddress, ORListenAddress, SocksListenAddress,
  421. and TransListenAddress.
  422. o Documentation:
  423. - Correct the IPv6 syntax in our documentation for the
  424. VirtualAddrNetworkIPv6 torrc option. Closes ticket 19743.
  425. o Removed code:
  426. - We no longer include the (dead, deprecated) bufferevent code in
  427. Tor. Closes ticket 19450. Based on a patch from U+039b.
  428. Changes in version 0.2.8.7 - 2016-08-24
  429. Tor 0.2.8.7 fixes an important bug related to the ReachableAddresses
  430. option in 0.2.8.6, and replaces a retiring bridge authority. Everyone
  431. who sets the ReachableAddresses option, and all bridges, are strongly
  432. encouraged to upgrade.
  433. o Directory authority changes:
  434. - The "Tonga" bridge authority has been retired; the new bridge
  435. authority is "Bifroest". Closes tickets 19728 and 19690.
  436. o Major bugfixes (client, security):
  437. - Only use the ReachableAddresses option to restrict the first hop
  438. in a path. In earlier versions of 0.2.8.x, it would apply to
  439. every hop in the path, with a possible degradation in anonymity
  440. for anyone using an uncommon ReachableAddress setting. Fixes bug
  441. 19973; bugfix on 0.2.8.2-alpha.
  442. o Minor features (geoip):
  443. - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
  444. Country database.
  445. o Minor bugfixes (compilation):
  446. - Remove an inappropriate "inline" in tortls.c that was causing
  447. warnings on older versions of GCC. Fixes bug 19903; bugfix
  448. on 0.2.8.1-alpha.
  449. o Minor bugfixes (fallback directories):
  450. - Avoid logging a NULL string pointer when loading fallback
  451. directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
  452. and 0.2.8.1-alpha. Report and patch by "rubiate".
  453. Changes in version 0.2.9.1-alpha - 2016-08-08
  454. Tor 0.2.9.1-alpha is the first alpha release in the 0.2.9 development
  455. series. It improves our support for hardened builds and compiler
  456. warnings, deploys some critical infrastructure for improvements to
  457. hidden services, includes a new timing backend that we hope to use for
  458. better support for traffic padding, makes it easier for programmers to
  459. log unexpected events, and contains other small improvements to
  460. security, correctness, and performance.
  461. Below are the changes since 0.2.8.6.
  462. o New system requirements:
  463. - Tor now requires Libevent version 2.0.10-stable or later. Older
  464. versions of Libevent have less efficient backends for several
  465. platforms, and lack the DNS code that we use for our server-side
  466. DNS support. This implements ticket 19554.
  467. - Tor now requires zlib version 1.2 or later, for security,
  468. efficiency, and (eventually) gzip support. (Back when we started,
  469. zlib 1.1 and zlib 1.0 were still found in the wild. 1.2 was
  470. released in 2003. We recommend the latest version.)
  471. o Major features (build, hardening):
  472. - Tor now builds with -ftrapv by default on compilers that support
  473. it. This option detects signed integer overflow (which C forbids),
  474. and turns it into a hard-failure. We do not apply this option to
  475. code that needs to run in constant time to avoid side-channels;
  476. instead, we use -fwrapv in that code. Closes ticket 17983.
  477. - When --enable-expensive-hardening is selected, stop applying the
  478. clang/gcc sanitizers to code that needs to run in constant time.
  479. Although we are aware of no introduced side-channels, we are not
  480. able to prove that there are none. Related to ticket 17983.
  481. o Major features (compilation):
  482. - Our big list of extra GCC warnings is now enabled by default when
  483. building with GCC (or with anything like Clang that claims to be
  484. GCC-compatible). To make all warnings into fatal compilation
  485. errors, pass --enable-fatal-warnings to configure. Closes
  486. ticket 19044.
  487. - Use the Autoconf macro AC_USE_SYSTEM_EXTENSIONS to automatically
  488. turn on C and POSIX extensions. (Previously, we attempted to do
  489. this on an ad hoc basis.) Closes ticket 19139.
  490. o Major features (directory authorities, hidden services):
  491. - Directory authorities can now perform the shared randomness
  492. protocol specified by proposal 250. Using this protocol, directory
  493. authorities generate a global fresh random value every day. In the
  494. future, this value will be used by hidden services to select
  495. HSDirs. This release implements the directory authority feature;
  496. the hidden service side will be implemented in the future as part
  497. of proposal 224. Resolves ticket 16943; implements proposal 250.
  498. o Major features (downloading, random exponential backoff):
  499. - When we fail to download an object from a directory service, wait
  500. for an (exponentially increasing) randomized amount of time before
  501. retrying, rather than a fixed interval as we did before. This
  502. prevents a group of Tor instances from becoming too synchronized,
  503. or a single Tor instance from becoming too predictable, in its
  504. download schedule. Closes ticket 15942.
  505. o Major bugfixes (exit policies):
  506. - Avoid disclosing exit outbound bind addresses, configured port
  507. bind addresses, and local interface addresses in relay descriptors
  508. by default under ExitPolicyRejectPrivate. Instead, only reject
  509. these (otherwise unlisted) addresses if
  510. ExitPolicyRejectLocalInterfaces is set. Fixes bug 18456; bugfix on
  511. 0.2.7.2-alpha. Patch by teor.
  512. o Major bugfixes (hidden service client):
  513. - Allow Tor clients with appropriate controllers to work with
  514. FetchHidServDescriptors set to 0. Previously, this option also
  515. disabled descriptor cache lookup, thus breaking hidden services
  516. entirely. Fixes bug 18704; bugfix on 0.2.0.20-rc. Patch by "twim".
  517. o Minor features (build, hardening):
  518. - Detect and work around a libclang_rt problem that would prevent
  519. clang from finding __mulodi4() on some 32-bit platforms, and thus
  520. keep -ftrapv from linking on those systems. Closes ticket 19079.
  521. - When building on a system without runtime support for the runtime
  522. hardening options, try to log a useful warning at configuration
  523. time, rather than an incomprehensible warning at link time. If
  524. expensive hardening was requested, this warning becomes an error.
  525. Closes ticket 18895.
  526. o Minor features (code safety):
  527. - In our integer-parsing functions, ensure that maxiumum value we
  528. give is no smaller than the minimum value. Closes ticket 19063;
  529. patch from U+039b.
  530. o Minor features (controller):
  531. - Implement new GETINFO queries for all downloads that use
  532. download_status_t to schedule retries. This allows controllers to
  533. examine the schedule for pending downloads. Closes ticket 19323.
  534. - Allow controllers to configure basic client authorization on
  535. hidden services when they create them with the ADD_ONION control
  536. command. Implements ticket 15588. Patch by "special".
  537. - Fire a STATUS_SERVER controller event whenever the hibernation
  538. status changes between "awake"/"soft"/"hard". Closes ticket 18685.
  539. o Minor features (directory authority):
  540. - Directory authorities now only give the Guard flag to a relay if
  541. they are also giving it the Stable flag. This change allows us to
  542. simplify path selection for clients. It should have minimal effect
  543. in practice, since >99% of Guards already have the Stable flag.
  544. Implements ticket 18624.
  545. - Directory authorities now write their v3-status-votes file out to
  546. disk earlier in the consensus process, so we have a record of the
  547. votes even if we abort the consensus process. Resolves
  548. ticket 19036.
  549. o Minor features (hidden service):
  550. - Stop being so strict about the payload length of "rendezvous1"
  551. cells. We used to be locked in to the "TAP" handshake length, and
  552. now we can handle better handshakes like "ntor". Resolves
  553. ticket 18998.
  554. o Minor features (infrastructure, time):
  555. - Tor now uses the operating system's monotonic timers (where
  556. available) for internal fine-grained timing. Previously we would
  557. look at the system clock, and then attempt to compensate for the
  558. clock running backwards. Closes ticket 18908.
  559. - Tor now includes an improved timer backend, so that we can
  560. efficiently support tens or hundreds of thousands of concurrent
  561. timers, as will be needed for some of our planned anti-traffic-
  562. analysis work. This code is based on William Ahern's "timeout.c"
  563. project, which implements a "tickless hierarchical timing wheel".
  564. Closes ticket 18365.
  565. o Minor features (logging):
  566. - Provide a more useful warning message when configured with an
  567. invalid Nickname. Closes ticket 18300; patch from "icanhasaccount".
  568. - When dumping unparseable router descriptors, optionally store them
  569. in separate files, named by digest, up to a configurable size
  570. limit. You can change the size limit by setting the
  571. MaxUnparseableDescSizeToLog option, and disable this feature by
  572. setting that option to 0. Closes ticket 18322.
  573. - Add a set of macros to check nonfatal assertions, for internal
  574. use. Migrating more of our checks to these should help us avoid
  575. needless crash bugs. Closes ticket 18613.
  576. o Minor features (performance):
  577. - Changer the "optimistic data" extension from "off by default" to
  578. "on by default". The default was ordinarily overridden by a
  579. consensus option, but when clients were bootstrapping for the
  580. first time, they would not have a consensus to get the option
  581. from. Changing this default When fetching a consensus for the
  582. first time, use optimistic data. This saves a round-trip during
  583. startup. Closes ticket 18815.
  584. o Minor features (relay, usability):
  585. - When the directory authorities refuse a bad relay's descriptor,
  586. encourage the relay operator to contact us. Many relay operators
  587. won't notice this line in their logs, but it's a win if even a few
  588. learn why we don't like what their relay was doing. Resolves
  589. ticket 18760.
  590. o Minor features (testing):
  591. - Let backtrace tests work correctly under AddressSanitizer. Fixes
  592. part of bug 18934; bugfix on 0.2.5.2-alpha.
  593. - Move the test-network.sh script to chutney, and modify tor's test-
  594. network.sh to call the (newer) chutney version when available.
  595. Resolves ticket 19116. Patch by teor.
  596. - Use the lcov convention for marking lines as unreachable, so that
  597. we don't count them when we're generating test coverage data.
  598. Update our coverage tools to understand this convention. Closes
  599. ticket 16792.
  600. o Minor bugfixes (bootstrap):
  601. - Remember the directory we fetched the consensus or previous
  602. certificates from, and use it to fetch future authority
  603. certificates. This change improves bootstrapping performance.
  604. Fixes bug 18963; bugfix on 0.2.8.1-alpha.
  605. o Minor bugfixes (build):
  606. - The test-stem and test-network makefile targets now depend only on
  607. the tor binary that they are testing. Previously, they depended on
  608. "make all". Fixes bug 18240; bugfix on 0.2.8.2-alpha. Based on a
  609. patch from "cypherpunks".
  610. o Minor bugfixes (circuits):
  611. - Make sure extend_info_from_router() is only called on servers.
  612. Fixes bug 19639; bugfix on 0.2.8.1-alpha.
  613. o Minor bugfixes (compilation):
  614. - When building with Clang, use a full set of GCC warnings.
  615. (Previously, we included only a subset, because of the way we
  616. detected them.) Fixes bug 19216; bugfix on 0.2.0.1-alpha.
  617. o Minor bugfixes (directory authority):
  618. - Authorities now sort the "package" lines in their votes, for ease
  619. of debugging. (They are already sorted in consensus documents.)
  620. Fixes bug 18840; bugfix on 0.2.6.3-alpha.
  621. - When parsing a detached signature, make sure we use the length of
  622. the digest algorithm instead of an hardcoded DIGEST256_LEN in
  623. order to avoid comparing bytes out-of-bounds with a smaller digest
  624. length such as SHA1. Fixes bug 19066; bugfix on 0.2.2.6-alpha.
  625. o Minor bugfixes (documentation):
  626. - Document the --passphrase-fd option in the tor manpage. Fixes bug
  627. 19504; bugfix on 0.2.7.3-rc.
  628. - Fix the description of the --passphrase-fd option in the
  629. tor-gencert manpage. The option is used to pass the number of a
  630. file descriptor to read the passphrase from, not to read the file
  631. descriptor from. Fixes bug 19505; bugfix on 0.2.0.20-alpha.
  632. o Minor bugfixes (ephemeral hidden service):
  633. - When deleting an ephemeral hidden service, close its intro points
  634. even if they are not completely open. Fixes bug 18604; bugfix
  635. on 0.2.7.1-alpha.
  636. o Minor bugfixes (guard selection):
  637. - Use a single entry guard even if the NumEntryGuards consensus
  638. parameter is not provided. Fixes bug 17688; bugfix
  639. on 0.2.5.6-alpha.
  640. - Don't mark guards as unreachable if connection_connect() fails.
  641. That function fails for local reasons, so it shouldn't reveal
  642. anything about the status of the guard. Fixes bug 14334; bugfix
  643. on 0.2.3.10-alpha.
  644. o Minor bugfixes (hidden service client):
  645. - Increase the minimum number of internal circuits we preemptively
  646. build from 2 to 3, so a circuit is available when a client
  647. connects to another onion service. Fixes bug 13239; bugfix
  648. on 0.1.0.1-rc.
  649. o Minor bugfixes (logging):
  650. - When logging a directory ownership mismatch, log the owning
  651. username correctly. Fixes bug 19578; bugfix on 0.2.2.29-beta.
  652. o Minor bugfixes (memory leaks):
  653. - Fix a small, uncommon memory leak that could occur when reading a
  654. truncated ed25519 key file. Fixes bug 18956; bugfix
  655. on 0.2.6.1-alpha.
  656. o Minor bugfixes (testing):
  657. - Allow clients to retry HSDirs much faster in test networks. Fixes
  658. bug 19702; bugfix on 0.2.7.1-alpha. Patch by teor.
  659. - Disable ASAN's detection of segmentation faults while running
  660. test_bt.sh, so that we can make sure that our own backtrace
  661. generation code works. Fixes another aspect of bug 18934; bugfix
  662. on 0.2.5.2-alpha. Patch from "cypherpunks".
  663. - Fix the test-network-all target on out-of-tree builds by using the
  664. correct path to the test driver script. Fixes bug 19421; bugfix
  665. on 0.2.7.3-rc.
  666. o Minor bugfixes (time):
  667. - Improve overflow checks in tv_udiff and tv_mdiff. Fixes bug 19483;
  668. bugfix on all released tor versions.
  669. - When computing the difference between two times in milliseconds,
  670. we now round to the nearest millisecond correctly. Previously, we
  671. could sometimes round in the wrong direction. Fixes bug 19428;
  672. bugfix on 0.2.2.2-alpha.
  673. o Minor bugfixes (user interface):
  674. - Display a more accurate number of suppressed messages in the log
  675. rate-limiter. Previously, there was a potential integer overflow
  676. in the counter. Now, if the number of messages hits a maximum, the
  677. rate-limiter doesn't count any further. Fixes bug 19435; bugfix
  678. on 0.2.4.11-alpha.
  679. - Fix a typo in the passphrase prompt for the ed25519 identity key.
  680. Fixes bug 19503; bugfix on 0.2.7.2-alpha.
  681. o Code simplification and refactoring:
  682. - Remove redundant declarations of the MIN macro. Closes
  683. ticket 18889.
  684. - Rename tor_dup_addr() to tor_addr_to_str_dup() to avoid confusion.
  685. Closes ticket 18462; patch from "icanhasaccount".
  686. - Split the 600-line directory_handle_command_get function into
  687. separate functions for different URL types. Closes ticket 16698.
  688. o Documentation:
  689. - Fix spelling of "--enable-tor2web-mode" in the manpage. Closes
  690. ticket 19153. Patch from "U+039b".
  691. o Removed features:
  692. - Remove support for "GET /tor/bytes.txt" DirPort request, and
  693. "GETINFO dir-usage" controller request, which were only available
  694. via a compile-time option in Tor anyway. Feature was added in
  695. 0.2.2.1-alpha. Resolves ticket 19035.
  696. - There is no longer a compile-time option to disable support for
  697. TransPort. (If you don't want TransPort; just don't use it.) Patch
  698. from "U+039b". Closes ticket 19449.
  699. o Testing:
  700. - Run more workqueue tests as part of "make check". These had
  701. previously been implemented, but you needed to know special
  702. command-line options to enable them.
  703. - We now have unit tests for our code to reject zlib "compression
  704. bombs". (Fortunately, the code works fine.)
  705. Changes in version 0.2.8.6 - 2016-08-02
  706. Tor 0.2.8.6 is the first stable version of the Tor 0.2.8 series.
  707. The Tor 0.2.8 series improves client bootstrapping performance,
  708. completes the authority-side implementation of improved identity
  709. keys for relays, and includes numerous bugfixes and performance
  710. improvements throughout the program. This release continues to
  711. improve the coverage of Tor's test suite. For a full list of
  712. changes since Tor 0.2.7, see the ReleaseNotes file.
  713. Changes since 0.2.8.5-rc:
  714. o Minor features (geoip):
  715. - Update geoip and geoip6 to the July 6 2016 Maxmind GeoLite2
  716. Country database.
  717. o Minor bugfixes (compilation):
  718. - Fix a compilation warning in the unit tests on systems where char
  719. is signed. Fixes bug 19682; bugfix on 0.2.8.1-alpha.
  720. o Minor bugfixes (fallback directories):
  721. - Remove a fallback that was on the hardcoded list, then opted-out.
  722. Fixes bug 19782; update to fallback list from 0.2.8.2-alpha.
  723. o Minor bugfixes (Linux seccomp2 sandbox):
  724. - Allow more syscalls when running with "Sandbox 1" enabled:
  725. sysinfo, getsockopt(SO_SNDBUF), and setsockopt(SO_SNDBUFFORCE). On
  726. some systems, these are required for Tor to start. Fixes bug
  727. 18397; bugfix on 0.2.5.1-alpha. Patch from Daniel Pinto.
  728. - Allow IPPROTO_UDP datagram sockets when running with "Sandbox 1",
  729. so that get_interface_address6_via_udp_socket_hack() can work.
  730. Fixes bug 19660; bugfix on 0.2.5.1-alpha.
  731. Changes in version 0.2.8.5-rc - 2016-07-07
  732. Tor 0.2.8.5-rc is the second release candidate in the Tor 0.2.8
  733. series. If we find no new bugs or regressions here, the first stable
  734. 0.2.8 release will be identical to it. It has a few small bugfixes
  735. against previous versions.
  736. o Directory authority changes:
  737. - Urras is no longer a directory authority. Closes ticket 19271.
  738. o Major bugfixes (heartbeat):
  739. - Fix a regression that would crash Tor when the periodic
  740. "heartbeat" log messages were disabled. Fixes bug 19454; bugfix on
  741. tor-0.2.8.1-alpha. Reported by "kubaku".
  742. o Minor features (build):
  743. - Tor now again builds with the recent OpenSSL 1.1 development
  744. branch (tested against 1.1.0-pre6-dev). Closes ticket 19499.
  745. - When building manual pages, set the timezone to "UTC", so that the
  746. output is reproducible. Fixes bug 19558; bugfix on 0.2.2.9-alpha.
  747. Patch from intrigeri.
  748. o Minor bugfixes (fallback directory selection):
  749. - Avoid errors during fallback selection if there are no eligible
  750. fallbacks. Fixes bug 19480; bugfix on 0.2.8.3-alpha. Patch
  751. by teor.
  752. o Minor bugfixes (IPv6, microdescriptors):
  753. - Don't check node addresses when we only have a routerstatus. This
  754. allows IPv6-only clients to bootstrap by fetching microdescriptors
  755. from fallback directory mirrors. (The microdescriptor consensus
  756. has no IPv6 addresses in it.) Fixes bug 19608; bugfix
  757. on 0.2.8.2-alpha.
  758. o Minor bugfixes (logging):
  759. - Reduce pointlessly verbose log messages when directory servers
  760. can't be found. Fixes bug 18849; bugfix on 0.2.8.3-alpha and
  761. 0.2.8.1-alpha. Patch by teor.
  762. - When a fallback directory changes its fingerprint from the hard-
  763. coded fingerprint, log a less severe, more explanatory log
  764. message. Fixes bug 18812; bugfix on 0.2.8.1-alpha. Patch by teor.
  765. o Minor bugfixes (Linux seccomp2 sandboxing):
  766. - Allow statistics to be written to disk when "Sandbox 1" is
  767. enabled. Fixes bugs 19556 and 19957; bugfix on 0.2.5.1-alpha and
  768. 0.2.6.1-alpha respectively.
  769. o Minor bugfixes (user interface):
  770. - Remove a warning message "Service [scrubbed] not found after
  771. descriptor upload". This message appears when one uses HSPOST
  772. control command to upload a service descriptor. Since there is
  773. only a descriptor and no service, showing this message is
  774. pointless and confusing. Fixes bug 19464; bugfix on 0.2.7.2-alpha.
  775. o Fallback directory list:
  776. - Add a comment to the generated fallback directory list that
  777. explains how to comment out unsuitable fallbacks in a way that's
  778. compatible with the stem fallback parser.
  779. - Update fallback whitelist and blacklist based on relay operator
  780. emails. Blacklist unsuitable (non-working, over-volatile)
  781. fallbacks. Resolves ticket 19071. Patch by teor.
  782. - Update hard-coded fallback list to remove unsuitable fallbacks.
  783. Resolves ticket 19071. Patch by teor.
  784. Changes in version 0.2.8.4-rc - 2016-06-15
  785. Tor 0.2.8.4-rc is the first release candidate in the Tor 0.2.8 series.
  786. If we find no new bugs or regressions here, the first stable 0.2.8
  787. release will be identical to it. It has a few small bugfixes against
  788. previous versions.
  789. o Major bugfixes (user interface):
  790. - Correctly give a warning in the cases where a relay is specified
  791. by nickname, and one such relay is found, but it is not officially
  792. Named. Fixes bug 19203; bugfix on 0.2.3.1-alpha.
  793. o Minor features (build):
  794. - Tor now builds once again with the recent OpenSSL 1.1 development
  795. branch (tested against 1.1.0-pre5 and 1.1.0-pre6-dev).
  796. o Minor features (geoip):
  797. - Update geoip and geoip6 to the June 7 2016 Maxmind GeoLite2
  798. Country database.
  799. o Minor bugfixes (compilation):
  800. - Cause the unit tests to compile correctly on mingw64 versions that
  801. lack sscanf. Fixes bug 19213; bugfix on 0.2.7.1-alpha.
  802. o Minor bugfixes (downloading):
  803. - Predict more correctly whether we'll be downloading over HTTP when
  804. we determine the maximum length of a URL. This should avoid a
  805. "BUG" warning about the Squid HTTP proxy and its URL limits. Fixes
  806. bug 19191.
  807. Changes in version 0.2.8.3-alpha - 2016-05-26
  808. Tor 0.2.8.3-alpha resolves several bugs, most of them introduced over
  809. the course of the 0.2.8 development cycle. It improves the behavior of
  810. directory clients, fixes several crash bugs, fixes a gap in compiler
  811. hardening, and allows the full integration test suite to run on
  812. more platforms.
  813. o Major bugfixes (security, client, DNS proxy):
  814. - Stop a crash that could occur when a client running with DNSPort
  815. received a query with multiple address types, and the first
  816. address type was not supported. Found and fixed by Scott Dial.
  817. Fixes bug 18710; bugfix on 0.2.5.4-alpha.
  818. o Major bugfixes (security, compilation):
  819. - Correctly detect compiler flags on systems where _FORTIFY_SOURCE
  820. is predefined. Previously, our use of -D_FORTIFY_SOURCE would
  821. cause a compiler warning, thereby making other checks fail, and
  822. needlessly disabling compiler-hardening support. Fixes one case of
  823. bug 18841; bugfix on 0.2.3.17-beta. Patch from "trudokal".
  824. o Major bugfixes (security, directory authorities):
  825. - Fix a crash and out-of-bounds write during authority voting, when
  826. the list of relays includes duplicate ed25519 identity keys. Fixes
  827. bug 19032; bugfix on 0.2.8.2-alpha.
  828. o Major bugfixes (client, bootstrapping):
  829. - Check if bootstrap consensus downloads are still needed when the
  830. linked connection attaches. This prevents tor making unnecessary
  831. begindir-style connections, which are the only directory
  832. connections tor clients make since the fix for 18483 was merged.
  833. - Fix some edge cases where consensus download connections may not
  834. have been closed, even though they were not needed. Related to fix
  835. for 18809.
  836. - Make relays retry consensus downloads the correct number of times,
  837. rather than the more aggressive client retry count. Fixes part of
  838. ticket 18809.
  839. - Stop downloading consensuses when we have a consensus, even if we
  840. don't have all the certificates for it yet. Fixes bug 18809;
  841. bugfix on 0.2.8.1-alpha. Patches by arma and teor.
  842. o Major bugfixes (directory mirrors):
  843. - Decide whether to advertise begindir support in the the same way
  844. we decide whether to advertise our DirPort. Allowing these
  845. decisions to become out-of-sync led to surprising behavior like
  846. advertising begindir support when hibernation made us not
  847. advertise a DirPort. Resolves bug 18616; bugfix on 0.2.8.1-alpha.
  848. Patch by teor.
  849. o Major bugfixes (IPv6 bridges, client):
  850. - Actually use IPv6 addresses when selecting directory addresses for
  851. IPv6 bridges. Fixes bug 18921; bugfix on 0.2.8.1-alpha. Patch
  852. by "teor".
  853. o Major bugfixes (key management):
  854. - If OpenSSL fails to generate an RSA key, do not retain a dangling
  855. pointer to the previous (uninitialized) key value. The impact here
  856. should be limited to a difficult-to-trigger crash, if OpenSSL is
  857. running an engine that makes key generation failures possible, or
  858. if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
  859. 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
  860. Baishakhi Ray.
  861. o Major bugfixes (testing):
  862. - Fix a bug that would block 'make test-network-all' on systems where
  863. IPv6 packets were lost. Fixes bug 19008; bugfix on tor-0.2.7.3-rc.
  864. - Avoid "WSANOTINITIALISED" warnings in the unit tests. Fixes bug 18668;
  865. bugfix on 0.2.8.1-alpha.
  866. o Minor features (clients):
  867. - Make clients, onion services, and bridge relays always use an
  868. encrypted begindir connection for directory requests. Resolves
  869. ticket 18483. Patch by "teor".
  870. o Minor features (fallback directory mirrors):
  871. - Give each fallback the same weight for client selection; restrict
  872. fallbacks to one per operator; report fallback directory detail
  873. changes when rebuilding list; add new fallback directory mirrors
  874. to the whitelist; update fallback directories based on the latest
  875. OnionOO data; and any other minor simplifications and fixes.
  876. Closes tasks 17158, 17905, 18749, bug 18689, and fixes part of bug
  877. 18812 on 0.2.8.1-alpha; patch by "teor".
  878. o Minor features (geoip):
  879. - Update geoip and geoip6 to the May 4 2016 Maxmind GeoLite2
  880. Country database.
  881. o Minor bugfixes (assert, portability):
  882. - Fix an assertion failure in memarea.c on systems where "long" is
  883. shorter than the size of a pointer. Fixes bug 18716; bugfix
  884. on 0.2.1.1-alpha.
  885. o Minor bugfixes (bootstrap):
  886. - Consistently use the consensus download schedule for authority
  887. certificates. Fixes bug 18816; bugfix on 0.2.4.13-alpha.
  888. o Minor bugfixes (build):
  889. - Remove a pair of redundant AM_CONDITIONAL declarations from
  890. configure.ac. Fixes one final case of bug 17744; bugfix
  891. on 0.2.8.2-alpha.
  892. - Resolve warnings when building on systems that are concerned with
  893. signed char. Fixes bug 18728; bugfix on 0.2.7.2-alpha
  894. and 0.2.6.1-alpha.
  895. - When libscrypt.h is found, but no libscrypt library can be linked,
  896. treat libscrypt as absent. Fixes bug 19161; bugfix
  897. on 0.2.6.1-alpha.
  898. o Minor bugfixes (client):
  899. - Turn all TestingClientBootstrap* into non-testing torrc options.
  900. This changes simply renames them by removing "Testing" in front of
  901. them and they do not require TestingTorNetwork to be enabled
  902. anymore. Fixes bug 18481; bugfix on 0.2.8.1-alpha.
  903. - Make directory node selection more reliable, mainly for IPv6-only
  904. clients and clients with few reachable addresses. Fixes bug 18929;
  905. bugfix on 0.2.8.1-alpha. Patch by "teor".
  906. o Minor bugfixes (controller, microdescriptors):
  907. - Make GETINFO dir/status-vote/current/consensus conform to the
  908. control specification by returning "551 Could not open cached
  909. consensus..." when not caching consensuses. Fixes bug 18920;
  910. bugfix on 0.2.2.6-alpha.
  911. o Minor bugfixes (crypto, portability):
  912. - The SHA3 and SHAKE routines now produce the correct output on Big
  913. Endian systems. No code calls either algorithm yet, so this is
  914. primarily a build fix. Fixes bug 18943; bugfix on 0.2.8.1-alpha.
  915. - Tor now builds again with the recent OpenSSL 1.1 development
  916. branch (tested against 1.1.0-pre4 and 1.1.0-pre5-dev). Closes
  917. ticket 18286.
  918. o Minor bugfixes (directories):
  919. - When fetching extrainfo documents, compare their SHA256 digests
  920. and Ed25519 signing key certificates with the routerinfo that led
  921. us to fetch them, rather than with the most recent routerinfo.
  922. Otherwise we generate many spurious warnings about mismatches.
  923. Fixes bug 17150; bugfix on 0.2.7.2-alpha.
  924. o Minor bugfixes (logging):
  925. - When we can't generate a signing key because OfflineMasterKey is
  926. set, do not imply that we should have been able to load it. Fixes
  927. bug 18133; bugfix on 0.2.7.2-alpha.
  928. - Stop periodic_event_dispatch() from blasting twelve lines per
  929. second at loglevel debug. Fixes bug 18729; fix on 0.2.8.1-alpha.
  930. - When rejecting a misformed INTRODUCE2 cell, only log at
  931. PROTOCOL_WARN severity. Fixes bug 18761; bugfix on 0.2.8.2-alpha.
  932. o Minor bugfixes (pluggable transports):
  933. - Avoid reporting a spurious error when we decide that we don't need
  934. to terminate a pluggable transport because it has already exited.
  935. Fixes bug 18686; bugfix on 0.2.5.5-alpha.
  936. o Minor bugfixes (pointer arithmetic):
  937. - Fix a bug in memarea_alloc() that could have resulted in remote
  938. heap write access, if Tor had ever passed an unchecked size to
  939. memarea_alloc(). Fortunately, all the sizes we pass to
  940. memarea_alloc() are pre-checked to be less than 128 kilobytes.
  941. Fixes bug 19150; bugfix on 0.2.1.1-alpha. Bug found by
  942. Guido Vranken.
  943. o Minor bugfixes (relays):
  944. - Consider more config options when relays decide whether to
  945. regenerate their descriptor. Fixes more of bug 12538; bugfix
  946. on 0.2.8.1-alpha.
  947. - Resolve some edge cases where we might launch an ORPort
  948. reachability check even when DisableNetwork is set. Noticed while
  949. fixing bug 18616; bugfix on 0.2.3.9-alpha.
  950. o Minor bugfixes (statistics):
  951. - We now include consensus downloads via IPv6 in our directory-
  952. request statistics. Fixes bug 18460; bugfix on 0.2.3.14-alpha.
  953. o Minor bugfixes (testing):
  954. - Allow directories in small networks to bootstrap by skipping
  955. DirPort checks when the consensus has no exits. Fixes bug 19003;
  956. bugfix on 0.2.8.1-alpha. Patch by teor.
  957. - Fix a small memory leak that would occur when the
  958. TestingEnableCellStatsEvent option was turned on. Fixes bug 18673;
  959. bugfix on 0.2.5.2-alpha.
  960. o Minor bugfixes (time handling):
  961. - When correcting a corrupt 'struct tm' value, fill in the tm_wday
  962. field. Otherwise, our unit tests crash on Windows. Fixes bug
  963. 18977; bugfix on 0.2.2.25-alpha.
  964. o Documentation:
  965. - Document the contents of the 'datadir/keys' subdirectory in the
  966. manual page. Closes ticket 17621.
  967. - Stop recommending use of nicknames to identify relays in our
  968. MapAddress documentation. Closes ticket 18312.
  969. Changes in version 0.2.8.2-alpha - 2016-03-28
  970. Tor 0.2.8.2-alpha is the second alpha in its series. It fixes numerous
  971. bugs in earlier versions of Tor, including some that prevented
  972. authorities using Tor 0.2.7.x from running correctly. IPv6 and
  973. directory support should also be much improved.
  974. o New system requirements:
  975. - Tor no longer supports versions of OpenSSL with a broken
  976. implementation of counter mode. (This bug was present in OpenSSL
  977. 1.0.0, and was fixed in OpenSSL 1.0.0a.) Tor still detects, but no
  978. longer runs with, these versions.
  979. - Tor no longer attempts to support platforms where the "time_t"
  980. type is unsigned. (To the best of our knowledge, only OpenVMS does
  981. this, and Tor has never actually built on OpenVMS.) Closes
  982. ticket 18184.
  983. - Tor now uses Autoconf version 2.63 or later, and Automake 1.11 or
  984. later (released in 2008 and 2009 respectively). If you are
  985. building Tor from the git repository instead of from the source
  986. distribution, and your tools are older than this, you will need to
  987. upgrade. Closes ticket 17732.
  988. o Major bugfixes (security, pointers):
  989. - Avoid a difficult-to-trigger heap corruption attack when extending
  990. a smartlist to contain over 16GB of pointers. Fixes bug 18162;
  991. bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
  992. Reported by Guido Vranken.
  993. o Major bugfixes (bridges, pluggable transports):
  994. - Modify the check for OR connections to private addresses. Allow
  995. bridges on private addresses, including pluggable transports that
  996. ignore the (potentially private) address in the bridge line. Fixes
  997. bug 18517; bugfix on 0.2.8.1-alpha. Reported by gk, patch by teor.
  998. o Major bugfixes (compilation):
  999. - Repair hardened builds under the clang compiler. Previously, our
  1000. use of _FORTIFY_SOURCE would conflict with clang's address
  1001. sanitizer. Fixes bug 14821; bugfix on 0.2.5.4-alpha.
  1002. o Major bugfixes (crash on shutdown):
  1003. - Correctly handle detaching circuits from muxes when shutting down.
  1004. Fixes bug 18116; bugfix on 0.2.8.1-alpha.
  1005. - Fix an assert-on-exit bug related to counting memory usage in
  1006. rephist.c. Fixes bug 18651; bugfix on 0.2.8.1-alpha.
  1007. o Major bugfixes (crash on startup):
  1008. - Fix a segfault during startup: If a Unix domain socket was
  1009. configured as listener (such as a ControlSocket or a SocksPort
  1010. "unix:" socket), and tor was started as root but not configured to
  1011. switch to another user, tor would segfault while trying to string
  1012. compare a NULL value. Fixes bug 18261; bugfix on 0.2.8.1-alpha.
  1013. Patch by weasel.
  1014. o Major bugfixes (dns proxy mode, crash):
  1015. - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
  1016. bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
  1017. o Major bugfixes (relays, bridge clients):
  1018. - Ensure relays always allow IPv4 OR and Dir connections. Ensure
  1019. bridge clients use the address configured in the bridge line.
  1020. Fixes bug 18348; bugfix on 0.2.8.1-alpha. Reported by sysrqb,
  1021. patch by teor.
  1022. o Major bugfixes (voting):
  1023. - Actually enable support for authorities to match routers by their
  1024. Ed25519 identities. Previously, the code had been written, but
  1025. some debugging code that had accidentally been left in the
  1026. codebase made it stay turned off. Fixes bug 17702; bugfix
  1027. on 0.2.7.2-alpha.
  1028. - When collating votes by Ed25519 identities, authorities now
  1029. include a "NoEdConsensus" flag if the ed25519 value (or lack
  1030. thereof) for a server does not reflect the majority consensus.
  1031. Related to bug 17668; bugfix on 0.2.7.2-alpha.
  1032. - When generating a vote with keypinning disabled, never include two
  1033. entries for the same ed25519 identity. This bug was causing
  1034. authorities to generate votes that they could not parse when a
  1035. router violated key pinning by changing its RSA identity but
  1036. keeping its Ed25519 identity. Fixes bug 17668; fixes part of bug
  1037. 18318. Bugfix on 0.2.7.2-alpha.
  1038. o Minor features (security, win32):
  1039. - Set SO_EXCLUSIVEADDRUSE on Win32 to avoid a local port-stealing
  1040. attack. Fixes bug 18123; bugfix on all tor versions. Patch
  1041. by teor.
  1042. o Minor features (bug-resistance):
  1043. - Make Tor survive errors involving connections without a
  1044. corresponding event object. Previously we'd fail with an
  1045. assertion; now we produce a log message. Related to bug 16248.
  1046. o Minor features (build):
  1047. - Detect systems with FreeBSD-derived kernels (such as GNU/kFreeBSD)
  1048. as having possible IPFW support. Closes ticket 18448. Patch from
  1049. Steven Chamberlain.
  1050. o Minor features (code hardening):
  1051. - Use tor_snprintf() and tor_vsnprintf() even in external and low-
  1052. level code, to harden against accidental failures to NUL-
  1053. terminate. Part of ticket 17852. Patch from jsturgix. Found
  1054. with Flawfinder.
  1055. o Minor features (crypto):
  1056. - Validate the hard-coded Diffie-Hellman parameters and ensure that
  1057. p is a safe prime, and g is a suitable generator. Closes
  1058. ticket 18221.
  1059. o Minor features (geoip):
  1060. - Update geoip and geoip6 to the March 3 2016 Maxmind GeoLite2
  1061. Country database.
  1062. o Minor features (hidden service directory):
  1063. - Streamline relay-side hsdir handling: when relays consider whether
  1064. to accept an uploaded hidden service descriptor, they no longer
  1065. check whether they are one of the relays in the network that is
  1066. "supposed" to handle that descriptor. Implements ticket 18332.
  1067. o Minor features (IPv6):
  1068. - Add ClientPreferIPv6DirPort, which is set to 0 by default. If set
  1069. to 1, tor prefers IPv6 directory addresses.
  1070. - Add ClientUseIPv4, which is set to 1 by default. If set to 0, tor
  1071. avoids using IPv4 for client OR and directory connections.
  1072. - Try harder to obey the IP version restrictions "ClientUseIPv4 0",
  1073. "ClientUseIPv6 0", "ClientPreferIPv6ORPort", and
  1074. "ClientPreferIPv6DirPort". Closes ticket 17840; patch by teor.
  1075. o Minor features (linux seccomp2 sandbox):
  1076. - Reject attempts to change our Address with "Sandbox 1" enabled.
  1077. Changing Address with Sandbox turned on would never actually work,
  1078. but previously it would fail in strange and confusing ways. Found
  1079. while fixing 18548.
  1080. o Minor features (robustness):
  1081. - Exit immediately with an error message if the code attempts to use
  1082. Libevent without having initialized it. This should resolve some
  1083. frequently-made mistakes in our unit tests. Closes ticket 18241.
  1084. o Minor features (unix domain sockets):
  1085. - Add a new per-socket option, RelaxDirModeCheck, to allow creating
  1086. Unix domain sockets without checking the permissions on the parent
  1087. directory. (Tor checks permissions by default because some
  1088. operating systems only check permissions on the parent directory.
  1089. However, some operating systems do look at permissions on the
  1090. socket, and tor's default check is unneeded.) Closes ticket 18458.
  1091. Patch by weasel.
  1092. o Minor bugfixes (exit policies, security):
  1093. - Refresh an exit relay's exit policy when interface addresses
  1094. change. Previously, tor only refreshed the exit policy when the
  1095. configured external address changed. Fixes bug 18208; bugfix on
  1096. 0.2.7.3-rc. Patch by teor.
  1097. o Minor bugfixes (security, hidden services):
  1098. - Prevent hidden services connecting to client-supplied rendezvous
  1099. addresses that are reserved as internal or multicast. Fixes bug
  1100. 8976; bugfix on 0.2.3.21-rc. Patch by dgoulet and teor.
  1101. o Minor bugfixes (build):
  1102. - Do not link the unit tests against both the testing and non-
  1103. testing versions of the static libraries. Fixes bug 18490; bugfix
  1104. on 0.2.7.1-alpha.
  1105. - Avoid spurious failures from configure files related to calling
  1106. exit(0) in TOR_SEARCH_LIBRARY. Fixes bug 18625; bugfix on
  1107. 0.2.0.1-alpha. Patch from "cypherpunks".
  1108. - Silence spurious clang-scan warnings in the ed25519_donna code by
  1109. explicitly initializing some objects. Fixes bug 18384; bugfix on
  1110. 0.2.7.2-alpha. Patch by teor.
  1111. o Minor bugfixes (client, bootstrap):
  1112. - Count receipt of new microdescriptors as progress towards
  1113. bootstrapping. Previously, with EntryNodes set, Tor might not
  1114. successfully repopulate the guard set on bootstrapping. Fixes bug
  1115. 16825; bugfix on 0.2.3.1-alpha.
  1116. o Minor bugfixes (code correctness):
  1117. - Update to the latest version of Trunnel, which tries harder to
  1118. avoid generating code that can invoke memcpy(p,NULL,0). Bug found
  1119. by clang address sanitizer. Fixes bug 18373; bugfix
  1120. on 0.2.7.2-alpha.
  1121. o Minor bugfixes (configuration):
  1122. - Fix a tiny memory leak when parsing a port configuration ending in
  1123. ":auto". Fixes bug 18374; bugfix on 0.2.3.3-alpha.
  1124. o Minor bugfixes (containers):
  1125. - If we somehow attempt to construct a heap with more than
  1126. 1073741822 elements, avoid an integer overflow when maintaining
  1127. the heap property. Fixes bug 18296; bugfix on 0.1.2.1-alpha.
  1128. o Minor bugfixes (correctness):
  1129. - Fix a bad memory handling bug that would occur if we had queued a
  1130. cell on a channel's incoming queue. Fortunately, we can't actually
  1131. queue a cell like that as our code is constructed today, but it's
  1132. best to avoid this kind of error, even if there isn't any code
  1133. that triggers it today. Fixes bug 18570; bugfix on 0.2.4.4-alpha.
  1134. o Minor bugfixes (directory):
  1135. - When generating a URL for a directory server on an IPv6 address,
  1136. wrap the IPv6 address in square brackets. Fixes bug 18051; bugfix
  1137. on 0.2.3.9-alpha. Patch from Malek.
  1138. o Minor bugfixes (fallback directory mirrors):
  1139. - When requesting extrainfo descriptors from a trusted directory
  1140. server, check whether it is an authority or a fallback directory
  1141. which supports extrainfo descriptors. Fixes bug 18489; bugfix on
  1142. 0.2.4.7-alpha. Reported by atagar, patch by teor.
  1143. o Minor bugfixes (hidden service, client):
  1144. - Handle the case where the user makes several fast consecutive
  1145. requests to the same .onion address. Previously, the first six
  1146. requests would each trigger a descriptor fetch, each picking a
  1147. directory (there are 6 overall) and the seventh one would fail
  1148. because no directories were left, thereby triggering a close on
  1149. all current directory connections asking for the hidden service.
  1150. The solution here is to not close the connections if we have
  1151. pending directory fetches. Fixes bug 15937; bugfix
  1152. on 0.2.7.1-alpha.
  1153. o Minor bugfixes (hidden service, control port):
  1154. - Add the onion address to the HS_DESC event for the UPLOADED action
  1155. both on success or failure. It was previously hardcoded with
  1156. UNKNOWN. Fixes bug 16023; bugfix on 0.2.7.2-alpha.
  1157. o Minor bugfixes (hidden service, directory):
  1158. - Bridges now refuse "rendezvous2" (hidden service descriptor)
  1159. publish attempts. Suggested by ticket 18332.
  1160. o Minor bugfixes (linux seccomp2 sandbox):
  1161. - Allow the setrlimit syscall, and the prlimit and prlimit64
  1162. syscalls, which some libc implementations use under the hood.
  1163. Fixes bug 15221; bugfix on 0.2.5.1-alpha.
  1164. - Avoid a 10-second delay when starting as a client with "Sandbox 1"
  1165. enabled and no DNS resolvers configured. This should help TAILS
  1166. start up faster. Fixes bug 18548; bugfix on 0.2.5.1-alpha.
  1167. - Fix the sandbox's interoperability with unix domain sockets under
  1168. setuid. Fixes bug 18253; bugfix on 0.2.8.1-alpha.
  1169. o Minor bugfixes (logging):
  1170. - When logging information about an unparsable networkstatus vote or
  1171. consensus, do not say "vote" when we mean consensus. Fixes bug
  1172. 18368; bugfix on 0.2.0.8-alpha.
  1173. - Scrub service name in "unrecognized service ID" log messages.
  1174. Fixes bug 18600; bugfix on 0.2.4.11-alpha.
  1175. - Downgrade logs and backtraces about IP versions to info-level.
  1176. Only log backtraces once each time tor runs. Assists in diagnosing
  1177. bug 18351; bugfix on 0.2.8.1-alpha. Reported by sysrqb and
  1178. Christian, patch by teor.
  1179. o Minor bugfixes (memory safety):
  1180. - Avoid freeing an uninitialized pointer when opening a socket fails
  1181. in get_interface_addresses_ioctl(). Fixes bug 18454; bugfix on
  1182. 0.2.3.11-alpha. Reported by toralf and "cypherpunks", patch
  1183. by teor.
  1184. - Correctly duplicate addresses in get_interface_address6_list().
  1185. Fixes bug 18454; bugfix on 0.2.8.1-alpha. Reported by toralf,
  1186. patch by "cypherpunks".
  1187. - Fix a memory leak in tor-gencert. Fixes part of bug 18672; bugfix
  1188. on 0.2.0.1-alpha.
  1189. - Fix a memory leak in "tor --list-fingerprint". Fixes part of bug
  1190. 18672; bugfix on 0.2.5.1-alpha.
  1191. o Minor bugfixes (private directory):
  1192. - Prevent a race condition when creating private directories. Fixes
  1193. part of bug 17852; bugfix on 0.0.2pre13. Part of ticket 17852.
  1194. Patch from jsturgix. Found with Flawfinder.
  1195. o Minor bugfixes (test networks, IPv6):
  1196. - Allow internal IPv6 addresses in descriptors in test networks.
  1197. Fixes bug 17153; bugfix on 0.2.3.16-alpha. Patch by teor, reported
  1198. by karsten.
  1199. o Minor bugfixes (testing):
  1200. - We no longer disable assertions in the unit tests when coverage is
  1201. enabled. Instead, we require you to say --disable-asserts-in-tests
  1202. to the configure script if you need assertions disabled in the
  1203. unit tests (for example, if you want to perform branch coverage).
  1204. Fixes bug 18242; bugfix on 0.2.7.1-alpha.
  1205. o Minor bugfixes (time parsing):
  1206. - Avoid overflow in tor_timegm when parsing dates in and after 2038
  1207. on platforms with 32-bit time_t. Fixes bug 18479; bugfix on
  1208. 0.0.2pre14. Patch by teor.
  1209. o Minor bugfixes (tor-gencert):
  1210. - Correctly handle the case where an authority operator enters a
  1211. passphrase but sends an EOF before sending a newline. Fixes bug
  1212. 17443; bugfix on 0.2.0.20-rc. Found by junglefowl.
  1213. o Code simplification and refactoring:
  1214. - Quote all the string interpolations in configure.ac -- even those
  1215. which we are pretty sure can't contain spaces. Closes ticket
  1216. 17744. Patch from zerosion.
  1217. - Remove specialized code for non-inplace AES_CTR. 99% of our AES is
  1218. inplace, so there's no need to have a separate implementation for
  1219. the non-inplace code. Closes ticket 18258. Patch from Malek.
  1220. - Simplify return types for some crypto functions that can't
  1221. actually fail. Patch from Hassan Alsibyani. Closes ticket 18259.
  1222. o Documentation:
  1223. - Change build messages to refer to "Fedora" instead of "Fedora
  1224. Core", and "dnf" instead of "yum". Closes tickets 18459 and 18426.
  1225. Patches from "icanhasaccount" and "cypherpunks".
  1226. o Removed features:
  1227. - We no longer maintain an internal freelist in memarea.c.
  1228. Allocators should be good enough to make this code unnecessary,
  1229. and it's doubtful that it ever had any performance benefit.
  1230. o Testing:
  1231. - Fix several warnings from clang's address sanitizer produced in
  1232. the unit tests.
  1233. - Treat backtrace test failures as expected on FreeBSD until we
  1234. solve bug 17808. Closes ticket 18204.
  1235. Changes in version 0.2.8.1-alpha - 2016-02-04
  1236. Tor 0.2.8.1-alpha is the first alpha release in its series. It
  1237. includes numerous small features and bugfixes against previous Tor
  1238. versions, and numerous small infrastructure improvements. The most
  1239. notable features are a set of improvements to the directory subsystem.
  1240. o Major features (security, Linux):
  1241. - When Tor starts as root on Linux and is told to switch user ID, it
  1242. can now retain the capability to bind to low ports. By default,
  1243. Tor will do this only when it's switching user ID and some low
  1244. ports have been configured. You can change this behavior with the
  1245. new option KeepBindCapabilities. Closes ticket 8195.
  1246. o Major features (directory system):
  1247. - When bootstrapping multiple consensus downloads at a time, use the
  1248. first one that starts downloading, and close the rest. This
  1249. reduces failures when authorities or fallback directories are slow
  1250. or down. Together with the code for feature 15775, this feature
  1251. should reduces failures due to fallback churn. Implements ticket
  1252. 4483. Patch by "teor". Implements IPv4 portions of proposal 210 by
  1253. "mikeperry" and "teor".
  1254. - Include a trial list of default fallback directories, based on an
  1255. opt-in survey of suitable relays. Doing this should make clients
  1256. bootstrap more quickly and reliably, and reduce the load on the
  1257. directory authorities. Closes ticket 15775. Patch by "teor".
  1258. Candidates identified using an OnionOO script by "weasel", "teor",
  1259. "gsathya", and "karsten".
  1260. - Previously only relays that explicitly opened a directory port
  1261. (DirPort) accepted directory requests from clients. Now all
  1262. relays, with and without a DirPort, accept and serve tunneled
  1263. directory requests that they receive through their ORPort. You can
  1264. disable this behavior using the new DirCache option. Closes
  1265. ticket 12538.
  1266. o Major key updates:
  1267. - Update the V3 identity key for the dannenberg directory authority:
  1268. it was changed on 18 November 2015. Closes task 17906. Patch
  1269. by "teor".
  1270. o Minor features (security, clock):
  1271. - Warn when the system clock appears to move back in time (when the
  1272. state file was last written in the future). Tor doesn't know that
  1273. consensuses have expired if the clock is in the past. Patch by
  1274. "teor". Implements ticket 17188.
  1275. o Minor features (security, exit policies):
  1276. - ExitPolicyRejectPrivate now rejects more private addresses by
  1277. default. Specifically, it now rejects the relay's outbound bind
  1278. addresses (if configured), and the relay's configured port
  1279. addresses (such as ORPort and DirPort). Fixes bug 17027; bugfix on
  1280. 0.2.0.11-alpha. Patch by "teor".
  1281. o Minor features (security, memory erasure):
  1282. - Set the unused entries in a smartlist to NULL. This helped catch
  1283. a (harmless) bug, and shouldn't affect performance too much.
  1284. Implements ticket 17026.
  1285. - Use SecureMemoryWipe() function to securely clean memory on
  1286. Windows. Previously we'd use OpenSSL's OPENSSL_cleanse() function.
  1287. Implements feature 17986.
  1288. - Use explicit_bzero or memset_s when present. Previously, we'd use
  1289. OpenSSL's OPENSSL_cleanse() function. Closes ticket 7419; patches
  1290. from <logan@hackers.mu> and <selven@hackers.mu>.
  1291. - Make memwipe() do nothing when passed a NULL pointer or buffer of
  1292. zero size. Check size argument to memwipe() for underflow. Fixes
  1293. bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
  1294. patch by "teor".
  1295. o Minor features (security, RNG):
  1296. - Adjust Tor's use of OpenSSL's RNG APIs so that they absolutely,
  1297. positively are not allowed to fail. Previously we depended on
  1298. internal details of OpenSSL's behavior. Closes ticket 17686.
  1299. - Never use the system entropy output directly for anything besides
  1300. seeding the PRNG. When we want to generate important keys, instead
  1301. of using system entropy directly, we now hash it with the PRNG
  1302. stream. This may help resist certain attacks based on broken OS
  1303. entropy implementations. Closes part of ticket 17694.
  1304. - Use modern system calls (like getentropy() or getrandom()) to
  1305. generate strong entropy on platforms that have them. Closes
  1306. ticket 13696.
  1307. o Minor features (accounting):
  1308. - Added two modes to the AccountingRule option: One for limiting
  1309. only the number of bytes sent ("AccountingRule out"), and one for
  1310. limiting only the number of bytes received ("AccountingRule in").
  1311. Closes ticket 15989; patch from "unixninja92".
  1312. o Minor features (build):
  1313. - Since our build process now uses "make distcheck", we no longer
  1314. force "make dist" to depend on "make check". Closes ticket 17893;
  1315. patch from "cypherpunks."
  1316. - Tor now builds successfully with the recent OpenSSL 1.1
  1317. development branch, and with the latest LibreSSL. Closes tickets
  1318. 17549, 17921, and 17984.
  1319. o Minor features (controller):
  1320. - Adds the FallbackDir entries to 'GETINFO config/defaults'. Closes
  1321. tickets 16774 and 17817. Patch by George Tankersley.
  1322. - New 'GETINFO hs/service/desc/id/' command to retrieve a hidden
  1323. service descriptor from a service's local hidden service
  1324. descriptor cache. Closes ticket 14846.
  1325. - Add 'GETINFO exit-policy/reject-private/[default,relay]', so
  1326. controllers can examine the the reject rules added by
  1327. ExitPolicyRejectPrivate. This makes it easier for stem to display
  1328. exit policies.
  1329. o Minor features (crypto):
  1330. - Add SHA512 support to crypto.c. Closes ticket 17663; patch from
  1331. George Tankersley.
  1332. - Add SHA3 and SHAKE support to crypto.c. Closes ticket 17783.
  1333. - When allocating a digest state object, allocate no more space than
  1334. we actually need. Previously, we would allocate as much space as
  1335. the state for the largest algorithm would need. This change saves
  1336. up to 672 bytes per circuit. Closes ticket 17796.
  1337. - Improve performance when hashing non-multiple of 8 sized buffers,
  1338. based on Andrew Moon's public domain SipHash-2-4 implementation.
  1339. Fixes bug 17544; bugfix on 0.2.5.3-alpha.
  1340. o Minor features (directory downloads):
  1341. - Wait for busy authorities and fallback directories to become non-
  1342. busy when bootstrapping. (A similar change was made in 6c443e987d
  1343. for directory caches chosen from the consensus.) Closes ticket
  1344. 17864; patch by "teor".
  1345. - Add UseDefaultFallbackDirs, which enables any hard-coded fallback
  1346. directory mirrors. The default is 1; set it to 0 to disable
  1347. fallbacks. Implements ticket 17576. Patch by "teor".
  1348. o Minor features (geoip):
  1349. - Update geoip and geoip6 to the January 5 2016 Maxmind GeoLite2
  1350. Country database.
  1351. o Minor features (IPv6):
  1352. - Add an argument 'ipv6=address:orport' to the DirAuthority and
  1353. FallbackDir torrc options, to specify an IPv6 address for an
  1354. authority or fallback directory. Add hard-coded ipv6 addresses for
  1355. directory authorities that have them. Closes ticket 17327; patch
  1356. from Nick Mathewson and "teor".
  1357. - Add address policy assume_action support for IPv6 addresses.
  1358. - Limit IPv6 mask bits to 128.
  1359. - Warn when comparing against an AF_UNSPEC address in a policy, it's
  1360. almost always a bug. Closes ticket 17863; patch by "teor".
  1361. - Allow users to configure directory authorities and fallback
  1362. directory servers with IPv6 addresses and ORPorts. Resolves
  1363. ticket 6027.
  1364. - routerset_parse now accepts IPv6 literal addresses. Fixes bug
  1365. 17060; bugfix on 0.2.1.3-alpha. Patch by "teor".
  1366. - Make tor_ersatz_socketpair work on IPv6-only systems. Fixes bug
  1367. 17638; bugfix on 0.0.2pre8. Patch by "teor".
  1368. o Minor features (logging):
  1369. - When logging to syslog, allow a tag to be added to the syslog
  1370. identity (the string prepended to every log message). The tag can
  1371. be configured with SyslogIdentityTag and defaults to none. Setting
  1372. it to "foo" will cause logs to be tagged as "Tor-foo". Closes
  1373. ticket 17194.
  1374. o Minor features (portability):
  1375. - Use timingsafe_memcmp() where available. Closes ticket 17944;
  1376. patch from <logan@hackers.mu>.
  1377. o Minor features (relay, address discovery):
  1378. - Add a family argument to get_interface_addresses_raw() and
  1379. subfunctions to make network interface address interogation more
  1380. efficient. Now Tor can specifically ask for IPv4, IPv6 or both
  1381. types of interfaces from the operating system. Resolves
  1382. ticket 17950.
  1383. - When get_interface_address6_list(.,AF_UNSPEC,.) is called and
  1384. fails to enumerate interface addresses using the platform-specific
  1385. API, have it rely on the UDP socket fallback technique to try and
  1386. find out what IP addresses (both IPv4 and IPv6) our machine has.
  1387. Resolves ticket 17951.
  1388. o Minor features (replay cache):
  1389. - The replay cache now uses SHA256 instead of SHA1. Implements
  1390. feature 8961. Patch by "teor", issue reported by "rransom".
  1391. o Minor features (unix file permissions):
  1392. - Defer creation of Unix sockets until after setuid. This avoids
  1393. needing CAP_CHOWN and CAP_FOWNER when using systemd's
  1394. CapabilityBoundingSet, or chown and fowner when using SELinux.
  1395. Implements part of ticket 17562. Patch from Jamie Nguyen.
  1396. - If any directory created by Tor is marked as group readable, the
  1397. filesystem group is allowed to be either the default GID or the
  1398. root user. Allowing root to read the DataDirectory prevents the
  1399. need for CAP_READ_SEARCH when using systemd's
  1400. CapabilityBoundingSet, or dac_read_search when using SELinux.
  1401. Implements part of ticket 17562. Patch from Jamie Nguyen.
  1402. - Introduce a new DataDirectoryGroupReadable option. If it is set to
  1403. 1, the DataDirectory will be made readable by the default GID.
  1404. Implements part of ticket 17562. Patch from Jamie Nguyen.
  1405. o Minor bugfixes (accounting):
  1406. - The max bandwidth when using 'AccountRule sum' is now correctly
  1407. logged. Fixes bug 18024; bugfix on 0.2.6.1-alpha. Patch
  1408. from "unixninja92".
  1409. o Minor bugfixes (code correctness):
  1410. - When closing an entry connection, generate a warning if we should
  1411. have sent an end cell for it but we haven't. Fixes bug 17876;
  1412. bugfix on 0.2.3.2-alpha.
  1413. - Assert that allocated memory held by the reputation code is freed
  1414. according to its internal counters. Fixes bug 17753; bugfix
  1415. on 0.1.1.1-alpha.
  1416. - Assert when the TLS contexts fail to initialize. Fixes bug 17683;
  1417. bugfix on 0.0.6.
  1418. o Minor bugfixes (compilation):
  1419. - Mark all object files that include micro-revision.i as depending
  1420. on it, so as to make parallel builds more reliable. Fixes bug
  1421. 17826; bugfix on 0.2.5.1-alpha.
  1422. - Don't try to use the pthread_condattr_setclock() function unless
  1423. it actually exists. Fixes compilation on NetBSD-6.x. Fixes bug
  1424. 17819; bugfix on 0.2.6.3-alpha.
  1425. - Fix backtrace compilation on FreeBSD. Fixes bug 17827; bugfix
  1426. on 0.2.5.2-alpha.
  1427. - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
  1428. bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
  1429. - Fix search for libevent libraries on OpenBSD (and other systems
  1430. that install libevent 1 and libevent 2 in parallel). Fixes bug
  1431. 16651; bugfix on 0.1.0.7-rc. Patch from "rubiate".
  1432. - Isolate environment variables meant for tests from the rest of the
  1433. build system. Fixes bug 17818; bugfix on 0.2.7.3-rc.
  1434. - Replace usage of 'INLINE' with 'inline'. Fixes bug 17804; bugfix
  1435. on 0.0.2pre8.
  1436. - Remove config.log only from make distclean, not from make clean.
  1437. Fixes bug 17924; bugfix on 0.2.4.1-alpha.
  1438. o Minor bugfixes (crypto):
  1439. - Check the return value of HMAC() and assert on failure. Fixes bug
  1440. 17658; bugfix on 0.2.3.6-alpha. Patch by "teor".
  1441. o Minor bugfixes (fallback directories):
  1442. - Mark fallbacks as "too busy" when they return a 503 response,
  1443. rather than just marking authorities. Fixes bug 17572; bugfix on
  1444. 0.2.4.7-alpha. Patch by "teor".
  1445. o Minor bugfixes (IPv6):
  1446. - Update the limits in max_dl_per_request for IPv6 address length.
  1447. Fixes bug 17573; bugfix on 0.2.1.5-alpha.
  1448. o Minor bugfixes (linux seccomp2 sandbox):
  1449. - Fix a crash when using offline master ed25519 keys with the Linux
  1450. seccomp2 sandbox enabled. Fixes bug 17675; bugfix on 0.2.7.3-rc.
  1451. o Minor bugfixes (logging):
  1452. - In log messages that include a function name, use __FUNCTION__
  1453. instead of __PRETTY_FUNCTION__. In GCC, these are synonymous, but
  1454. with clang __PRETTY_FUNCTION__ has extra information we don't
  1455. need. Fixes bug 16563; bugfix on 0.0.2pre8. Fix by Tom van
  1456. der Woerdt.
  1457. - Remove needless quotes from a log message about unparseable
  1458. addresses. Fixes bug 17843; bugfix on 0.2.3.3-alpha.
  1459. o Minor bugfixes (portability):
  1460. - Remove an #endif from configure.ac so that we correctly detect the
  1461. presence of in6_addr.s6_addr32. Fixes bug 17923; bugfix
  1462. on 0.2.0.13-alpha.
  1463. o Minor bugfixes (relays):
  1464. - Check that both the ORPort and DirPort (if present) are reachable
  1465. before publishing a relay descriptor. Otherwise, relays publish a
  1466. descriptor with DirPort 0 when the DirPort reachability test takes
  1467. longer than the ORPort reachability test. Fixes bug 18050; bugfix
  1468. on 0.1.0.1-rc. Reported by "starlight", patch by "teor".
  1469. o Minor bugfixes (relays, hidden services):
  1470. - Refuse connection requests to private OR addresses unless
  1471. ExtendAllowPrivateAddresses is set. Previously, tor would connect,
  1472. then refuse to send any cells to a private address. Fixes bugs
  1473. 17674 and 8976; bugfix on 0.2.3.21-rc. Patch by "teor".
  1474. o Minor bugfixes (safe logging):
  1475. - When logging a malformed hostname received through socks4, scrub
  1476. it if SafeLogging says we should. Fixes bug 17419; bugfix
  1477. on 0.1.1.16-rc.
  1478. o Minor bugfixes (statistics code):
  1479. - Consistently check for overflow in round_*_to_next_multiple_of
  1480. functions, and add unit tests with additional and maximal values.
  1481. Fixes part of bug 13192; bugfix on 0.2.2.1-alpha.
  1482. - Handle edge cases in the laplace functions: avoid division by
  1483. zero, avoid taking the log of zero, and silence clang type
  1484. conversion warnings using round and trunc. Add unit tests for edge
  1485. cases with maximal values. Fixes part of bug 13192; bugfix
  1486. on 0.2.6.2-alpha.
  1487. o Minor bugfixes (testing):
  1488. - The test for log_heartbeat was incorrectly failing in timezones
  1489. with non-integer offsets. Instead of comparing the end of the time
  1490. string against a constant, compare it to the output of
  1491. format_local_iso_time when given the correct input. Fixes bug
  1492. 18039; bugfix on 0.2.5.4-alpha.
  1493. - Make unit tests pass on IPv6-only systems, and systems without
  1494. localhost addresses (like some FreeBSD jails). Fixes bug 17632;
  1495. bugfix on 0.2.7.3-rc. Patch by "teor".
  1496. - Fix a memory leak in the ntor test. Fixes bug 17778; bugfix
  1497. on 0.2.4.8-alpha.
  1498. - Check the full results of SHA256 and SHA512 digests in the unit
  1499. tests. Bugfix on 0.2.2.4-alpha. Patch by "teor".
  1500. o Code simplification and refactoring:
  1501. - Move logging of redundant policy entries in
  1502. policies_parse_exit_policy_internal into its own function. Closes
  1503. ticket 17608; patch from "juce".
  1504. - Extract the more complicated parts of circuit_mark_for_close()
  1505. into a new function that we run periodically before circuits are
  1506. freed. This change removes more than half of the functions
  1507. currently in the "blob". Closes ticket 17218.
  1508. - Clean up a little duplicated code in
  1509. crypto_expand_key_material_TAP(). Closes ticket 17587; patch
  1510. from "pfrankw".
  1511. - Decouple the list of streams waiting to be attached to circuits
  1512. from the overall connection list. This change makes it possible to
  1513. attach streams quickly while simplifying Tor's callgraph and
  1514. avoiding O(N) scans of the entire connection list. Closes
  1515. ticket 17590.
  1516. - When a direct directory request fails immediately on launch,
  1517. instead of relaunching that request from inside the code that
  1518. launches it, instead mark the connection for teardown. This change
  1519. simplifies Tor's callback and prevents the directory-request
  1520. launching code from invoking itself recursively. Closes
  1521. ticket 17589
  1522. - Remove code for configuring OpenSSL dynamic locks; OpenSSL doesn't
  1523. use them. Closes ticket 17926.
  1524. o Documentation:
  1525. - Add a description of the correct use of the '--keygen' command-
  1526. line option. Closes ticket 17583; based on text by 's7r'.
  1527. - Document the minimum HeartbeatPeriod value. Closes ticket 15638.
  1528. - Explain actual minima for BandwidthRate. Closes ticket 16382.
  1529. - Fix a minor formatting typo in the manpage. Closes ticket 17791.
  1530. - Mention torspec URL in the manpage and point the reader to it
  1531. whenever we mention a document that belongs in torspce. Fixes
  1532. issue 17392.
  1533. o Removed features:
  1534. - Remove client-side support for connecting to Tor relays running
  1535. versions of Tor before 0.2.3.6-alpha. These relays didn't support
  1536. the v3 TLS handshake protocol, and are no longer allowed on the
  1537. Tor network. Implements the client side of ticket 11150. Based on
  1538. patches by Tom van der Woerdt.
  1539. o Testing:
  1540. - Add unit tests to check for common RNG failure modes, such as
  1541. returning all zeroes, identical values, or incrementing values
  1542. (OpenSSL's rand_predictable feature). Patch by "teor".
  1543. - Log more information when the backtrace tests fail. Closes ticket
  1544. 17892. Patch from "cypherpunks."
  1545. - Always test both ed25519 backends, so that we can be sure that our
  1546. batch-open replacement code works. Part of ticket 16794.
  1547. - Cover dns_resolve_impl() in dns.c with unit tests. Implements a
  1548. portion of ticket 16831.
  1549. - More unit tests for compat_libevent.c, procmon.c, tortls.c,
  1550. util_format.c, directory.c, and options_validate.c. Closes tickets
  1551. 17075, 17082, 17084, 17003, and 17076 respectively. Patches from
  1552. Ola Bini.
  1553. - Unit tests for directory_handle_command_get. Closes ticket 17004.
  1554. Patch from Reinaldo de Souza Jr.
  1555. Changes in version 0.2.7.6 - 2015-12-10
  1556. Tor version 0.2.7.6 fixes a major bug in entry guard selection, as
  1557. well as a minor bug in hidden service reliability.
  1558. o Major bugfixes (guard selection):
  1559. - Actually look at the Guard flag when selecting a new directory
  1560. guard. When we implemented the directory guard design, we
  1561. accidentally started treating all relays as if they have the Guard
  1562. flag during guard selection, leading to weaker anonymity and worse
  1563. performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
  1564. by Mohsen Imani.
  1565. o Minor features (geoip):
  1566. - Update geoip and geoip6 to the December 1 2015 Maxmind GeoLite2
  1567. Country database.
  1568. o Minor bugfixes (compilation):
  1569. - When checking for net/pfvar.h, include netinet/in.h if possible.
  1570. This fixes transparent proxy detection on OpenBSD. Fixes bug
  1571. 17551; bugfix on 0.1.2.1-alpha. Patch from "rubiate".
  1572. - Fix a compilation warning with Clang 3.6: Do not check the
  1573. presence of an address which can never be NULL. Fixes bug 17781.
  1574. o Minor bugfixes (correctness):
  1575. - When displaying an IPv6 exit policy, include the mask bits
  1576. correctly even when the number is greater than 31. Fixes bug
  1577. 16056; bugfix on 0.2.4.7-alpha. Patch from "gturner".
  1578. - The wrong list was used when looking up expired intro points in a
  1579. rend service object, causing what we think could be reachability
  1580. issues for hidden services, and triggering a BUG log. Fixes bug
  1581. 16702; bugfix on 0.2.7.2-alpha.
  1582. - Fix undefined behavior in the tor_cert_checksig function. Fixes
  1583. bug 17722; bugfix on 0.2.7.2-alpha.
  1584. Changes in version 0.2.7.5 - 2015-11-20
  1585. The Tor 0.2.7 release series is dedicated to the memory of Tor user
  1586. and privacy advocate Caspar Bowden (1961-2015). Caspar worked
  1587. tirelessly to advocate human rights regardless of national borders,
  1588. and oppose the encroachments of mass surveillance. He opposed national
  1589. exceptionalism, he brought clarity to legal and policy debates, he
  1590. understood and predicted the impact of mass surveillance on the world,
  1591. and he laid the groundwork for resisting it. While serving on the Tor
  1592. Project's board of directors, he brought us his uncompromising focus
  1593. on technical excellence in the service of humankind. Caspar was an
  1594. inimitable force for good and a wonderful friend. He was kind,
  1595. humorous, generous, gallant, and believed we should protect one
  1596. another without exception. We honor him here for his ideals, his
  1597. efforts, and his accomplishments. Please honor his memory with works
  1598. that would make him proud.
  1599. Tor 0.2.7.5 is the first stable release in the Tor 0.2.7 series.
  1600. The 0.2.7 series adds a more secure identity key type for relays,
  1601. improves cryptography performance, resolves several longstanding
  1602. hidden-service performance issues, improves controller support for
  1603. hidden services, and includes small bugfixes and performance
  1604. improvements throughout the program. This release series also includes
  1605. more tests than before, and significant simplifications to which parts
  1606. of Tor invoke which others.
  1607. (This release contains no code changes since 0.2.7.4-rc.)
  1608. Changes in version 0.2.7.4-rc - 2015-10-21
  1609. Tor 0.2.7.4-rc is the second release candidate in the 0.2.7 series. It
  1610. fixes some important memory leaks, and a scary-looking (but mostly
  1611. harmless in practice) invalid-read bug. It also has a few small
  1612. bugfixes, notably fixes for compilation and portability on different
  1613. platforms. If no further significant bounds are found, the next
  1614. release will the the official stable release.
  1615. o Major bugfixes (security, correctness):
  1616. - Fix an error that could cause us to read 4 bytes before the
  1617. beginning of an openssl string. This bug could be used to cause
  1618. Tor to crash on systems with unusual malloc implementations, or
  1619. systems with unusual hardening installed. Fixes bug 17404; bugfix
  1620. on 0.2.3.6-alpha.
  1621. o Major bugfixes (correctness):
  1622. - Fix a use-after-free bug in validate_intro_point_failure(). Fixes
  1623. bug 17401; bugfix on 0.2.7.3-rc.
  1624. o Major bugfixes (memory leaks):
  1625. - Fix a memory leak in ed25519 batch signature checking. Fixes bug
  1626. 17398; bugfix on 0.2.6.1-alpha.
  1627. - Fix a memory leak in rend_cache_failure_entry_free(). Fixes bug
  1628. 17402; bugfix on 0.2.7.3-rc.
  1629. - Fix a memory leak when reading an expired signing key from disk.
  1630. Fixes bug 17403; bugfix on 0.2.7.2-rc.
  1631. o Minor features (geoIP):
  1632. - Update geoip and geoip6 to the October 9 2015 Maxmind GeoLite2
  1633. Country database.
  1634. o Minor bugfixes (compilation):
  1635. - Repair compilation with the most recent (unreleased, alpha)
  1636. vesions of OpenSSL 1.1. Fixes part of ticket 17237.
  1637. - Fix an integer overflow warning in test_crypto_slow.c. Fixes bug
  1638. 17251; bugfix on 0.2.7.2-alpha.
  1639. - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
  1640. bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
  1641. o Minor bugfixes (portability):
  1642. - Use libexecinfo on FreeBSD to enable backtrace support. Fixes
  1643. part of bug 17151; bugfix on 0.2.5.2-alpha. Patch from
  1644. Marcin Cieślak.
  1645. o Minor bugfixes (sandbox):
  1646. - Add the "hidserv-stats" filename to our sandbox filter for the
  1647. HiddenServiceStatistics option to work properly. Fixes bug 17354;
  1648. bugfix on 0.2.6.2-alpha. Patch from David Goulet.
  1649. o Minor bugfixes (testing):
  1650. - Add unit tests for get_interface_address* failure cases. Fixes bug
  1651. 17173; bugfix on 0.2.7.3-rc. Patch by fk/teor.
  1652. - Fix breakage when running 'make check' with BSD make. Fixes bug
  1653. 17154; bugfix on 0.2.7.3-rc. Patch by Marcin Cieślak.
  1654. - Make the get_ifaddrs_* unit tests more tolerant of different
  1655. network configurations. (Don't assume every test box has an IPv4
  1656. address, and don't assume every test box has a non-localhost
  1657. address.) Fixes bug 17255; bugfix on 0.2.7.3-rc. Patch by "teor".
  1658. - Skip backtrace tests when backtrace support is not compiled in.
  1659. Fixes part of bug 17151; bugfix on 0.2.7.1-alpha. Patch from
  1660. Marcin Cieślak.
  1661. o Documentation:
  1662. - Fix capitalization of SOCKS in sample torrc. Closes ticket 15609.
  1663. - Note that HiddenServicePorts can take a unix domain socket. Closes
  1664. ticket 17364.
  1665. Changes in version 0.2.7.3-rc - 2015-09-25
  1666. Tor 0.2.7.3-rc is the first release candidate in the 0.2.7 series. It
  1667. contains numerous usability fixes for Ed25519 keys, safeguards against
  1668. several misconfiguration problems, significant simplifications to
  1669. Tor's callgraph, and numerous bugfixes and small features.
  1670. This is the most tested release of Tor to date. The unit tests cover
  1671. 39.40% of the code, and the integration tests (accessible with "make
  1672. test-full-online", requiring stem and chutney and a network
  1673. connection) raise the coverage to 64.49%.
  1674. o Major features (security, hidden services):
  1675. - Hidden services, if using the EntryNodes option, are required to
  1676. use more than one EntryNode, in order to avoid a guard discovery
  1677. attack. (This would only affect people who had configured hidden
  1678. services and manually specified the EntryNodes option with a
  1679. single entry-node. The impact was that it would be easy to
  1680. remotely identify the guard node used by such a hidden service.
  1681. See ticket for more information.) Fixes ticket 14917.
  1682. o Major features (Ed25519 keys, keypinning):
  1683. - The key-pinning option on directory authorities is now advisory-
  1684. only by default. In a future version, or when the AuthDirPinKeys
  1685. option is set, pins are enforced again. Disabling key-pinning
  1686. seemed like a good idea so that we can survive the fallout of any
  1687. usability problems associated with Ed25519 keys. Closes
  1688. ticket 17135.
  1689. o Major features (Ed25519 performance):
  1690. - Improve the speed of Ed25519 operations and Curve25519 keypair
  1691. generation when built targeting 32 bit x86 platforms with SSE2
  1692. available. Implements ticket 16535.
  1693. - Improve the runtime speed of Ed25519 signature verification by
  1694. using Ed25519-donna's batch verification support. Implements
  1695. ticket 16533.
  1696. o Major features (performance testing):
  1697. - The test-network.sh script now supports performance testing.
  1698. Requires corresponding chutney performance testing changes. Patch
  1699. by "teor". Closes ticket 14175.
  1700. o Major features (relay, Ed25519):
  1701. - Significant usability improvements for Ed25519 key management. Log
  1702. messages are better, and the code can recover from far more
  1703. failure conditions. Thanks to "s7r" for reporting and diagnosing
  1704. so many of these!
  1705. - Add a new OfflineMasterKey option to tell Tor never to try loading
  1706. or generating a secret Ed25519 identity key. You can use this in
  1707. combination with tor --keygen to manage offline and/or encrypted
  1708. Ed25519 keys. Implements ticket 16944.
  1709. - Add a --newpass option to allow changing or removing the
  1710. passphrase of an encrypted key with tor --keygen. Implements part
  1711. of ticket 16769.
  1712. - On receiving a HUP signal, check to see whether the Ed25519
  1713. signing key has changed, and reload it if so. Closes ticket 16790.
  1714. o Major bugfixes (relay, Ed25519):
  1715. - Avoid crashing on 'tor --keygen'. Fixes bug 16679; bugfix on
  1716. 0.2.7.2-alpha. Reported by "s7r".
  1717. - Improve handling of expired signing keys with offline master keys.
  1718. Fixes bug 16685; bugfix on 0.2.7.2-alpha. Reported by "s7r".
  1719. o Minor features (client-side privacy):
  1720. - New KeepAliveIsolateSOCKSAuth option to indefinitely extend circuit
  1721. lifespan when IsolateSOCKSAuth and streams with SOCKS
  1722. authentication are attached to the circuit. This allows
  1723. applications like TorBrowser to manage circuit lifetime on their
  1724. own. Implements feature 15482.
  1725. - When logging malformed hostnames from SOCKS5 requests, respect
  1726. SafeLogging configuration. Fixes bug 16891; bugfix on 0.1.1.16-rc.
  1727. o Minor features (compilation):
  1728. - Give a warning as early as possible when trying to build with an
  1729. unsupported OpenSSL version. Closes ticket 16901.
  1730. - Fail during configure if we're trying to build against an OpenSSL
  1731. built without ECC support. Fixes bug 17109, bugfix on 0.2.7.1-alpha
  1732. which started requiring ECC.
  1733. o Minor features (geoip):
  1734. - Update geoip and geoip6 to the September 3 2015 Maxmind GeoLite2
  1735. Country database.
  1736. o Minor features (hidden services):
  1737. - Relays need to have the Fast flag to get the HSDir flag. As this
  1738. is being written, we'll go from 2745 HSDirs down to 2342, a ~14%
  1739. drop. This change should make some attacks against the hidden
  1740. service directory system harder. Fixes ticket 15963.
  1741. - Turn on hidden service statistics collection by setting the torrc
  1742. option HiddenServiceStatistics to "1" by default. (This keeps
  1743. track only of the fraction of traffic used by hidden services, and
  1744. the total number of hidden services in existence.) Closes
  1745. ticket 15254.
  1746. - Client now uses an introduction point failure cache to know when
  1747. to fetch or keep a descriptor in their cache. Previously, failures
  1748. were recorded implicitly, but not explicitly remembered. Closes
  1749. ticket 16389.
  1750. o Minor features (testing, authorities, documentation):
  1751. - New TestingDirAuthVote{Exit,Guard,HSDir}IsStrict flags to
  1752. explicitly manage consensus flags in testing networks. Patch by
  1753. "robgjansen", modified by "teor". Implements part of ticket 14882.
  1754. o Minor bugfixes (security, exit policies):
  1755. - ExitPolicyRejectPrivate now also rejects the relay's published
  1756. IPv6 address (if any), and any publicly routable IPv4 or IPv6
  1757. addresses on any local interfaces. ticket 17027. Patch by "teor".
  1758. Fixes bug 17027; bugfix on 0.2.0.11-alpha.
  1759. o Minor bug fixes (torrc exit policies):
  1760. - In torrc, "accept6 *" and "reject6 *" ExitPolicy lines now only
  1761. produce IPv6 wildcard addresses. Previously they would produce
  1762. both IPv4 and IPv6 wildcard addresses. Patch by "teor". Fixes part
  1763. of bug 16069; bugfix on 0.2.4.7-alpha.
  1764. - When parsing torrc ExitPolicies, we now warn for a number of cases
  1765. where the user's intent is likely to differ from Tor's actual
  1766. behavior. These include: using an IPv4 address with an accept6 or
  1767. reject6 line; using "private" on an accept6 or reject6 line; and
  1768. including any ExitPolicy lines after accept *:* or reject *:*.
  1769. Related to ticket 16069.
  1770. - When parsing torrc ExitPolicies, we now issue an info-level
  1771. message when expanding an "accept/reject *" line to include both
  1772. IPv4 and IPv6 wildcard addresses. Related to ticket 16069.
  1773. - In each instance above, usage advice is provided to avoid the
  1774. message. Resolves ticket 16069. Patch by "teor". Fixes part of bug
  1775. 16069; bugfix on 0.2.4.7-alpha.
  1776. o Minor bugfixes (authority):
  1777. - Don't assign "HSDir" to a router if it isn't Valid and Running.
  1778. Fixes bug 16524; bugfix on 0.2.7.2-alpha.
  1779. - Downgrade log messages about Ed25519 key issues if they are in old
  1780. cached router descriptors. Fixes part of bug 16286; bugfix
  1781. on 0.2.7.2-alpha.
  1782. - When we find an Ed25519 key issue in a cached descriptor, stop
  1783. saying the descriptor was just "uploaded". Fixes another part of
  1784. bug 16286; bugfix on 0.2.7.2-alpha.
  1785. o Minor bugfixes (control port):
  1786. - Repair a warning and a spurious result when getting the maximum
  1787. number of file descriptors from the controller. Fixes bug 16697;
  1788. bugfix on 0.2.7.2-alpha.
  1789. o Minor bugfixes (correctness):
  1790. - When calling channel_free_list(), avoid calling smartlist_remove()
  1791. while inside a FOREACH loop. This partially reverts commit
  1792. 17356fe7fd96af where the correct SMARTLIST_DEL_CURRENT was
  1793. incorrectly removed. Fixes bug 16924; bugfix on 0.2.4.4-alpha.
  1794. o Minor bugfixes (documentation):
  1795. - Advise users on how to configure separate IPv4 and IPv6 exit
  1796. policies in the manpage and sample torrcs. Related to ticket 16069.
  1797. - Fix the usage message of tor-resolve(1) so that it no longer lists
  1798. the removed -F option. Fixes bug 16913; bugfix on 0.2.2.28-beta.
  1799. - Fix an error in the manual page and comments for
  1800. TestingDirAuthVoteHSDir[IsStrict], which suggested that a HSDir
  1801. required "ORPort connectivity". While this is true, it is in no
  1802. way unique to the HSDir flag. Of all the flags, only HSDirs need a
  1803. DirPort configured in order for the authorities to assign that
  1804. particular flag. Patch by "teor". Fixed as part of 14882; bugfix
  1805. on 0.2.6.3-alpha.
  1806. o Minor bugfixes (Ed25519):
  1807. - Fix a memory leak when reading router descriptors with expired
  1808. Ed25519 certificates. Fixes bug 16539; bugfix on 0.2.7.2-alpha.
  1809. o Minor bugfixes (linux seccomp2 sandbox):
  1810. - Allow bridge authorities to run correctly under the seccomp2
  1811. sandbox. Fixes bug 16964; bugfix on 0.2.5.1-alpha.
  1812. - Allow routers with ed25519 keys to run correctly under the
  1813. seccomp2 sandbox. Fixes bug 16965; bugfix on 0.2.7.2-alpha.
  1814. o Minor bugfixes (open file limit):
  1815. - Fix set_max_file_descriptors() to set by default the max open file
  1816. limit to the current limit when setrlimit() fails. Fixes bug
  1817. 16274; bugfix on 0.2.0.10-alpha. Patch by dgoulet.
  1818. o Minor bugfixes (portability):
  1819. - Try harder to normalize the exit status of the Tor process to the
  1820. standard-provided range. Fixes bug 16975; bugfix on every version
  1821. of Tor ever.
  1822. - Check correctly for Windows socket errors in the workqueue
  1823. backend. Fixes bug 16741; bugfix on 0.2.6.3-alpha.
  1824. - Fix the behavior of crypto_rand_time_range() when told to consider
  1825. times before 1970. (These times were possible when running in a
  1826. simulated network environment where time()'s output starts at
  1827. zero.) Fixes bug 16980; bugfix on 0.2.7.1-alpha.
  1828. - Restore correct operation of TLS client-cipher detection on
  1829. OpenSSL 1.1. Fixes bug 14047; bugfix on 0.2.7.2-alpha.
  1830. o Minor bugfixes (relay):
  1831. - Ensure that worker threads actually exit when a fatal error or
  1832. shutdown is indicated. This fix doesn't currently affect the
  1833. behavior of Tor, because Tor workers never indicates fatal error
  1834. or shutdown except in the unit tests. Fixes bug 16868; bugfix
  1835. on 0.2.6.3-alpha.
  1836. - Unblock threads before releasing the work queue mutex to ensure
  1837. predictable scheduling behavior. Fixes bug 16644; bugfix
  1838. on 0.2.6.3-alpha.
  1839. o Code simplification and refactoring:
  1840. - Change the function that's called when we need to retry all
  1841. downloads so that it only reschedules the downloads to happen
  1842. immediately, rather than launching them all at once itself. This
  1843. further simplifies Tor's callgraph.
  1844. - Move some format-parsing functions out of crypto.c and
  1845. crypto_curve25519.c into crypto_format.c and/or util_format.c.
  1846. - Move the client-only parts of init_keys() into a separate
  1847. function. Closes ticket 16763.
  1848. - Simplify the microdesc_free() implementation so that it no longer
  1849. appears (to code analysis tools) to potentially invoke a huge
  1850. suite of other microdesc functions.
  1851. - Simply the control graph further by deferring the inner body of
  1852. directory_all_unreachable() into a callback. Closes ticket 16762.
  1853. - Treat the loss of an owning controller as equivalent to a SIGTERM
  1854. signal. This removes a tiny amount of duplicated code, and
  1855. simplifies our callgraph. Closes ticket 16788.
  1856. - When generating an event to send to the controller, we no longer
  1857. put the event over the network immediately. Instead, we queue
  1858. these events, and use a Libevent callback to deliver them. This
  1859. change simplifies Tor's callgraph by reducing the number of
  1860. functions from which all other Tor functions are reachable. Closes
  1861. ticket 16695.
  1862. - Wrap Windows-only C files inside '#ifdef _WIN32' so that tools
  1863. that try to scan or compile every file on Unix won't decide that
  1864. they are broken.
  1865. - Remove the unused "nulterminate" argument from buf_pullup().
  1866. o Documentation:
  1867. - Recommend a 40 GB example AccountingMax in torrc.sample rather
  1868. than a 4 GB max. Closes ticket 16742.
  1869. - Include the TUNING document in our source tarball. It is referred
  1870. to in the ChangeLog and an error message. Fixes bug 16929; bugfix
  1871. on 0.2.6.1-alpha.
  1872. o Removed code:
  1873. - The internal pure-C tor-fw-helper tool is now removed from the Tor
  1874. distribution, in favor of the pure-Go clone available from
  1875. https://gitweb.torproject.org/tor-fw-helper.git/ . The libraries
  1876. used by the C tor-fw-helper are not, in our opinion, very
  1877. confidence- inspiring in their secure-programming techniques.
  1878. Closes ticket 13338.
  1879. - Remove the code that would try to aggressively flush controller
  1880. connections while writing to them. This code was introduced in
  1881. 0.1.2.7-alpha, in order to keep output buffers from exceeding
  1882. their limits. But there is no longer a maximum output buffer size,
  1883. and flushing data in this way caused some undesirable recursions
  1884. in our call graph. Closes ticket 16480.
  1885. o Testing:
  1886. - Make "bridges+hs" the default test network. This tests almost all
  1887. tor functionality during make test-network, while allowing tests
  1888. to succeed on non-IPv6 systems. Requires chutney commit 396da92 in
  1889. test-network-bridges-hs. Closes tickets 16945 (tor) and 16946
  1890. (chutney). Patches by "teor".
  1891. - Autodetect CHUTNEY_PATH if the chutney and Tor sources are side-
  1892. by-side in the same parent directory. Closes ticket 16903. Patch
  1893. by "teor".
  1894. - Use environment variables rather than autoconf substitutions to
  1895. send variables from the build system to the test scripts. This
  1896. change should be easier to maintain, and cause 'make distcheck' to
  1897. work better than before. Fixes bug 17148.
  1898. - Add a new set of callgraph analysis scripts that use clang to
  1899. produce a list of which Tor functions are reachable from which
  1900. other Tor functions. We're planning to use these to help simplify
  1901. our code structure by identifying illogical dependencies.
  1902. - Add new 'test-full' and 'test-full-online' targets to run all
  1903. tests, including integration tests with stem and chutney.
  1904. - Make the test-workqueue test work on Windows by initializing the
  1905. network before we begin.
  1906. - New make target (make test-network-all) to run multiple applicable
  1907. chutney test cases. Patch from Teor; closes 16953.
  1908. - Unit test dns_resolve(), dns_clip_ttl() and dns_get_expiry_ttl()
  1909. functions in dns.c. Implements a portion of ticket 16831.
  1910. - When building Tor with testing coverage enabled, run Chutney tests
  1911. (if any) using the 'tor-cov' coverage binary.
  1912. - When running test-network or test-stem, check for the absence of
  1913. stem/chutney before doing any build operations.
  1914. Changes in version 0.2.7.2-alpha - 2015-07-27
  1915. This, the second alpha in the Tor 0.2.7 series, has a number of new
  1916. features, including a way to manually pick the number of introduction
  1917. points for hidden services, and the much stronger Ed25519 signing key
  1918. algorithm for regular Tor relays (including support for encrypted
  1919. offline identity keys in the new algorithm).
  1920. Support for Ed25519 on relays is currently limited to signing router
  1921. descriptors; later alphas in this series will extend Ed25519 key
  1922. support to more parts of the Tor protocol.
  1923. o Major features (Ed25519 identity keys, Proposal 220):
  1924. - All relays now maintain a stronger identity key, using the Ed25519
  1925. elliptic curve signature format. This master key is designed so
  1926. that it can be kept offline. Relays also generate an online
  1927. signing key, and a set of other Ed25519 keys and certificates.
  1928. These are all automatically regenerated and rotated as needed.
  1929. Implements part of ticket 12498.
  1930. - Directory authorities now vote on Ed25519 identity keys along with
  1931. RSA1024 keys. Implements part of ticket 12498.
  1932. - Directory authorities track which Ed25519 identity keys have been
  1933. used with which RSA1024 identity keys, and do not allow them to
  1934. vary freely. Implements part of ticket 12498.
  1935. - Microdescriptors now include Ed25519 identity keys. Implements
  1936. part of ticket 12498.
  1937. - Add support for offline encrypted Ed25519 master keys. To use this
  1938. feature on your tor relay, run "tor --keygen" to make a new master
  1939. key (or to make a new signing key if you already have a master
  1940. key). Closes ticket 13642.
  1941. o Major features (Hidden services):
  1942. - Add the torrc option HiddenServiceNumIntroductionPoints, to
  1943. specify a fixed number of introduction points. Its maximum value
  1944. is 10 and default is 3. Using this option can increase a hidden
  1945. service's reliability under load, at the cost of making it more
  1946. visible that the hidden service is facing extra load. Closes
  1947. ticket 4862.
  1948. - Remove the adaptive algorithm for choosing the number of
  1949. introduction points, which used to change the number of
  1950. introduction points (poorly) depending on the number of
  1951. connections the HS sees. Closes ticket 4862.
  1952. o Major features (onion key cross-certification):
  1953. - Relay descriptors now include signatures of their own identity
  1954. keys, made using the TAP and ntor onion keys. These signatures
  1955. allow relays to prove ownership of their own onion keys. Because
  1956. of this change, microdescriptors will no longer need to include
  1957. RSA identity keys. Implements proposal 228; closes ticket 12499.
  1958. o Major features (performance):
  1959. - Improve the runtime speed of Ed25519 operations by using the
  1960. public-domain Ed25519-donna by Andrew M. ("floodyberry").
  1961. Implements ticket 16467.
  1962. - Improve the runtime speed of the ntor handshake by using an
  1963. optimized curve25519 basepoint scalarmult implementation from the
  1964. public-domain Ed25519-donna by Andrew M. ("floodyberry"), based on
  1965. ideas by Adam Langley. Implements ticket 9663.
  1966. o Major bugfixes (client-side privacy, also in 0.2.6.9):
  1967. - Properly separate out each SOCKSPort when applying stream
  1968. isolation. The error occurred because each port's session group
  1969. was being overwritten by a default value when the listener
  1970. connection was initialized. Fixes bug 16247; bugfix on
  1971. 0.2.6.3-alpha. Patch by "jojelino".
  1972. o Major bugfixes (hidden service clients, stability, also in 0.2.6.10):
  1973. - Stop refusing to store updated hidden service descriptors on a
  1974. client. This reverts commit 9407040c59218 (which indeed fixed bug
  1975. 14219, but introduced a major hidden service reachability
  1976. regression detailed in bug 16381). This is a temporary fix since
  1977. we can live with the minor issue in bug 14219 (it just results in
  1978. some load on the network) but the regression of 16381 is too much
  1979. of a setback. First-round fix for bug 16381; bugfix
  1980. on 0.2.6.3-alpha.
  1981. o Major bugfixes (hidden services):
  1982. - When cannibalizing a circuit for an introduction point, always
  1983. extend to the chosen exit node (creating a 4 hop circuit).
  1984. Previously Tor would use the current circuit exit node, which
  1985. changed the original choice of introduction point, and could cause
  1986. the hidden service to skip excluded introduction points or
  1987. reconnect to a skipped introduction point. Fixes bug 16260; bugfix
  1988. on 0.1.0.1-rc.
  1989. o Major bugfixes (open file limit):
  1990. - The open file limit wasn't checked before calling
  1991. tor_accept_socket_nonblocking(), which would make Tor exceed the
  1992. limit. Now, before opening a new socket, Tor validates the open
  1993. file limit just before, and if the max has been reached, return an
  1994. error. Fixes bug 16288; bugfix on 0.1.1.1-alpha.
  1995. o Major bugfixes (stability, also in 0.2.6.10):
  1996. - Stop crashing with an assertion failure when parsing certain kinds
  1997. of malformed or truncated microdescriptors. Fixes bug 16400;
  1998. bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
  1999. by "cypherpunks_backup".
  2000. - Stop random client-side assertion failures that could occur when
  2001. connecting to a busy hidden service, or connecting to a hidden
  2002. service while a NEWNYM is in progress. Fixes bug 16013; bugfix
  2003. on 0.1.0.1-rc.
  2004. o Minor features (directory authorities, security, also in 0.2.6.9):
  2005. - The HSDir flag given by authorities now requires the Stable flag.
  2006. For the current network, this results in going from 2887 to 2806
  2007. HSDirs. Also, it makes it harder for an attacker to launch a sybil
  2008. attack by raising the effort for a relay to become Stable to
  2009. require at the very least 7 days, while maintaining the 96 hours
  2010. uptime requirement for HSDir. Implements ticket 8243.
  2011. o Minor features (client):
  2012. - Relax the validation of hostnames in SOCKS5 requests, allowing the
  2013. character '_' to appear, in order to cope with domains observed in
  2014. the wild that are serving non-RFC compliant records. Resolves
  2015. ticket 16430.
  2016. - Relax the validation done to hostnames in SOCKS5 requests, and
  2017. allow a single trailing '.' to cope with clients that pass FQDNs
  2018. using that syntax to explicitly indicate that the domain name is
  2019. fully-qualified. Fixes bug 16674; bugfix on 0.2.6.2-alpha.
  2020. - Add GroupWritable and WorldWritable options to unix-socket based
  2021. SocksPort and ControlPort options. These options apply to a single
  2022. socket, and override {Control,Socks}SocketsGroupWritable. Closes
  2023. ticket 15220.
  2024. o Minor features (control protocol):
  2025. - Support network-liveness GETINFO key and NETWORK_LIVENESS event in
  2026. the control protocol. Resolves ticket 15358.
  2027. o Minor features (directory authorities):
  2028. - Directory authorities no longer vote against the "Fast", "Stable",
  2029. and "HSDir" flags just because they were going to vote against
  2030. "Running": if the consensus turns out to be that the router was
  2031. running, then the authority's vote should count. Patch from Peter
  2032. Retzlaff; closes issue 8712.
  2033. o Minor features (geoip, also in 0.2.6.10):
  2034. - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
  2035. - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
  2036. o Minor features (hidden services):
  2037. - Add the new options "HiddenServiceMaxStreams" and
  2038. "HiddenServiceMaxStreamsCloseCircuit" to allow hidden services to
  2039. limit the maximum number of simultaneous streams per circuit, and
  2040. optionally tear down the circuit when the limit is exceeded. Part
  2041. of ticket 16052.
  2042. o Minor features (portability):
  2043. - Use C99 variadic macros when the compiler is not GCC. This avoids
  2044. failing compilations on MSVC, and fixes a log-file-based race
  2045. condition in our old workarounds. Original patch from Gisle Vanem.
  2046. o Minor bugfixes (compilation, also in 0.2.6.9):
  2047. - Build with --enable-systemd correctly when libsystemd is
  2048. installed, but systemd is not. Fixes bug 16164; bugfix on
  2049. 0.2.6.3-alpha. Patch from Peter Palfrader.
  2050. o Minor bugfixes (controller):
  2051. - Add the descriptor ID in each HS_DESC control event. It was
  2052. missing, but specified in control-spec.txt. Fixes bug 15881;
  2053. bugfix on 0.2.5.2-alpha.
  2054. o Minor bugfixes (crypto error-handling, also in 0.2.6.10):
  2055. - Check for failures from crypto_early_init, and refuse to continue.
  2056. A previous typo meant that we could keep going with an
  2057. uninitialized crypto library, and would have OpenSSL initialize
  2058. its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
  2059. when implementing ticket 4900. Patch by "teor".
  2060. o Minor bugfixes (hidden services):
  2061. - Fix a crash when reloading configuration while at least one
  2062. configured and one ephemeral hidden service exists. Fixes bug
  2063. 16060; bugfix on 0.2.7.1-alpha.
  2064. - Avoid crashing with a double-free bug when we create an ephemeral
  2065. hidden service but adding it fails for some reason. Fixes bug
  2066. 16228; bugfix on 0.2.7.1-alpha.
  2067. o Minor bugfixes (Linux seccomp2 sandbox):
  2068. - Use the sandbox in tor_open_cloexec whether or not O_CLOEXEC is
  2069. defined. Patch by "teor". Fixes bug 16515; bugfix on 0.2.3.1-alpha.
  2070. o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.10):
  2071. - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
  2072. these when eventfd2() support is missing. Fixes bug 16363; bugfix
  2073. on 0.2.6.3-alpha. Patch from "teor".
  2074. o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.9):
  2075. - Fix sandboxing to work when running as a relay, by allowing the
  2076. renaming of secret_id_key, and allowing the eventfd2 and futex
  2077. syscalls. Fixes bug 16244; bugfix on 0.2.6.1-alpha. Patch by
  2078. Peter Palfrader.
  2079. - Allow systemd connections to work with the Linux seccomp2 sandbox
  2080. code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
  2081. Peter Palfrader.
  2082. o Minor bugfixes (relay):
  2083. - Fix a rarely-encountered memory leak when failing to initialize
  2084. the thread pool. Fixes bug 16631; bugfix on 0.2.6.3-alpha. Patch
  2085. from "cypherpunks".
  2086. o Minor bugfixes (systemd):
  2087. - Fix an accidental formatting error that broke the systemd
  2088. configuration file. Fixes bug 16152; bugfix on 0.2.7.1-alpha.
  2089. - Tor's systemd unit file no longer contains extraneous spaces.
  2090. These spaces would sometimes confuse tools like deb-systemd-
  2091. helper. Fixes bug 16162; bugfix on 0.2.5.5-alpha.
  2092. o Minor bugfixes (tests):
  2093. - Use the configured Python executable when running test-stem-full.
  2094. Fixes bug 16470; bugfix on 0.2.7.1-alpha.
  2095. o Minor bugfixes (tests, also in 0.2.6.9):
  2096. - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
  2097. 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
  2098. o Minor bugfixes (threads, comments):
  2099. - Always initialize return value in compute_desc_id in rendcommon.c
  2100. Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
  2101. - Check for NULL values in getinfo_helper_onions(). Patch by "teor".
  2102. Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
  2103. - Remove undefined directive-in-macro in test_util_writepid clang
  2104. 3.7 complains that using a preprocessor directive inside a macro
  2105. invocation in test_util_writepid in test_util.c is undefined.
  2106. Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
  2107. o Code simplification and refactoring:
  2108. - Define WINVER and _WIN32_WINNT centrally, in orconfig.h, in order
  2109. to ensure they remain consistent and visible everywhere.
  2110. - Remove some vestigial workarounds for the MSVC6 compiler. We
  2111. haven't supported that in ages.
  2112. - The link authentication code has been refactored for better
  2113. testability and reliability. It now uses code generated with the
  2114. "trunnel" binary encoding generator, to reduce the risk of bugs
  2115. due to programmer error. Done as part of ticket 12498.
  2116. o Documentation:
  2117. - Include a specific and (hopefully) accurate documentation of the
  2118. torrc file's meta-format in doc/torrc_format.txt. This is mainly
  2119. of interest to people writing programs to parse or generate torrc
  2120. files. This document is not a commitment to long-term
  2121. compatibility; some aspects of the current format are a bit
  2122. ridiculous. Closes ticket 2325.
  2123. o Removed features:
  2124. - Tor no longer supports copies of OpenSSL that are missing support
  2125. for Elliptic Curve Cryptography. (We began using ECC when
  2126. available in 0.2.4.8-alpha, for more safe and efficient key
  2127. negotiation.) In particular, support for at least one of P256 or
  2128. P224 is now required, with manual configuration needed if only
  2129. P224 is available. Resolves ticket 16140.
  2130. - Tor no longer supports versions of OpenSSL before 1.0. (If you are
  2131. on an operating system that has not upgraded to OpenSSL 1.0 or
  2132. later, and you compile Tor from source, you will need to install a
  2133. more recent OpenSSL to link Tor against.) These versions of
  2134. OpenSSL are still supported by the OpenSSL, but the numerous
  2135. cryptographic improvements in later OpenSSL releases makes them a
  2136. clear choice. Resolves ticket 16034.
  2137. - Remove the HidServDirectoryV2 option. Now all relays offer to
  2138. store hidden service descriptors. Related to 16543.
  2139. - Remove the VoteOnHidServDirectoriesV2 option, since all
  2140. authorities have long set it to 1. Closes ticket 16543.
  2141. o Testing:
  2142. - Document use of coverity, clang static analyzer, and clang dynamic
  2143. undefined behavior and address sanitizers in doc/HACKING. Include
  2144. detailed usage instructions in the blacklist. Patch by "teor".
  2145. Closes ticket 15817.
  2146. - The link authentication protocol code now has extensive tests.
  2147. - The relay descriptor signature testing code now has
  2148. extensive tests.
  2149. - The test_workqueue program now runs faster, and is enabled by
  2150. default as a part of "make check".
  2151. - Now that OpenSSL has its own scrypt implementation, add an unit
  2152. test that checks for interoperability between libscrypt_scrypt()
  2153. and OpenSSL's EVP_PBE_scrypt() so that we could not use libscrypt
  2154. and rely on EVP_PBE_scrypt() whenever possible. Resolves
  2155. ticket 16189.
  2156. Changes in version 0.2.6.10 - 2015-07-12
  2157. Tor version 0.2.6.10 fixes some significant stability and hidden
  2158. service client bugs, bulletproofs the cryptography init process, and
  2159. fixes a bug when using the sandbox code with some older versions of
  2160. Linux. Everyone running an older version, especially an older version
  2161. of 0.2.6, should upgrade.
  2162. o Major bugfixes (hidden service clients, stability):
  2163. - Stop refusing to store updated hidden service descriptors on a
  2164. client. This reverts commit 9407040c59218 (which indeed fixed bug
  2165. 14219, but introduced a major hidden service reachability
  2166. regression detailed in bug 16381). This is a temporary fix since
  2167. we can live with the minor issue in bug 14219 (it just results in
  2168. some load on the network) but the regression of 16381 is too much
  2169. of a setback. First-round fix for bug 16381; bugfix
  2170. on 0.2.6.3-alpha.
  2171. o Major bugfixes (stability):
  2172. - Stop crashing with an assertion failure when parsing certain kinds
  2173. of malformed or truncated microdescriptors. Fixes bug 16400;
  2174. bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
  2175. by "cypherpunks_backup".
  2176. - Stop random client-side assertion failures that could occur when
  2177. connecting to a busy hidden service, or connecting to a hidden
  2178. service while a NEWNYM is in progress. Fixes bug 16013; bugfix
  2179. on 0.1.0.1-rc.
  2180. o Minor features (geoip):
  2181. - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
  2182. - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
  2183. o Minor bugfixes (crypto error-handling):
  2184. - Check for failures from crypto_early_init, and refuse to continue.
  2185. A previous typo meant that we could keep going with an
  2186. uninitialized crypto library, and would have OpenSSL initialize
  2187. its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
  2188. when implementing ticket 4900. Patch by "teor".
  2189. o Minor bugfixes (Linux seccomp2 sandbox):
  2190. - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
  2191. these when eventfd2() support is missing. Fixes bug 16363; bugfix
  2192. on 0.2.6.3-alpha. Patch from "teor".
  2193. Changes in version 0.2.6.9 - 2015-06-11
  2194. Tor 0.2.6.9 fixes a regression in the circuit isolation code, increases the
  2195. requirements for receiving an HSDir flag, and addresses some other small
  2196. bugs in the systemd and sandbox code. Clients using circuit isolation
  2197. should upgrade; all directory authorities should upgrade.
  2198. o Major bugfixes (client-side privacy):
  2199. - Properly separate out each SOCKSPort when applying stream
  2200. isolation. The error occurred because each port's session group was
  2201. being overwritten by a default value when the listener connection
  2202. was initialized. Fixes bug 16247; bugfix on 0.2.6.3-alpha. Patch
  2203. by "jojelino".
  2204. o Minor feature (directory authorities, security):
  2205. - The HSDir flag given by authorities now requires the Stable flag.
  2206. For the current network, this results in going from 2887 to 2806
  2207. HSDirs. Also, it makes it harder for an attacker to launch a sybil
  2208. attack by raising the effort for a relay to become Stable which
  2209. takes at the very least 7 days to do so and by keeping the 96
  2210. hours uptime requirement for HSDir. Implements ticket 8243.
  2211. o Minor bugfixes (compilation):
  2212. - Build with --enable-systemd correctly when libsystemd is
  2213. installed, but systemd is not. Fixes bug 16164; bugfix on
  2214. 0.2.6.3-alpha. Patch from Peter Palfrader.
  2215. o Minor bugfixes (Linux seccomp2 sandbox):
  2216. - Fix sandboxing to work when running as a relaymby renaming of
  2217. secret_id_key, and allowing the eventfd2 and futex syscalls. Fixes
  2218. bug 16244; bugfix on 0.2.6.1-alpha. Patch by Peter Palfrader.
  2219. - Allow systemd connections to work with the Linux seccomp2 sandbox
  2220. code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
  2221. Peter Palfrader.
  2222. o Minor bugfixes (tests):
  2223. - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
  2224. 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
  2225. Changes in version 0.2.6.8 - 2015-05-21
  2226. Tor 0.2.6.8 fixes a bit of dodgy code in parsing INTRODUCE2 cells, and
  2227. fixes an authority-side bug in assigning the HSDir flag. All directory
  2228. authorities should upgrade.
  2229. o Major bugfixes (hidden services, backport from 0.2.7.1-alpha):
  2230. - Revert commit that made directory authorities assign the HSDir
  2231. flag to relay without a DirPort; this was bad because such relays
  2232. can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
  2233. on 0.2.6.3-alpha.
  2234. o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
  2235. - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
  2236. a client authorized hidden service. Fixes bug 15823; bugfix
  2237. on 0.2.1.6-alpha.
  2238. o Minor features (geoip):
  2239. - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
  2240. - Update geoip6 to the April 8 2015 Maxmind GeoLite2
  2241. Country database.
  2242. Changes in version 0.2.7.1-alpha - 2015-05-12
  2243. Tor 0.2.7.1-alpha is the first alpha release in its series. It
  2244. includes numerous small features and bugfixes against previous Tor
  2245. versions, and numerous small infrastructure improvements. The most
  2246. notable features are several new ways for controllers to interact with
  2247. the hidden services subsystem.
  2248. o New system requirements:
  2249. - Tor no longer includes workarounds to support Libevent versions
  2250. before 1.3e. Libevent 2.0 or later is recommended. Closes
  2251. ticket 15248.
  2252. o Major features (controller):
  2253. - Add the ADD_ONION and DEL_ONION commands that allow the creation
  2254. and management of hidden services via the controller. Closes
  2255. ticket 6411.
  2256. - New "GETINFO onions/current" and "GETINFO onions/detached"
  2257. commands to get information about hidden services created via the
  2258. controller. Part of ticket 6411.
  2259. - New HSFETCH command to launch a request for a hidden service
  2260. descriptor. Closes ticket 14847.
  2261. - New HSPOST command to upload a hidden service descriptor. Closes
  2262. ticket 3523. Patch by "DonnchaC".
  2263. o Major bugfixes (hidden services):
  2264. - Revert commit that made directory authorities assign the HSDir
  2265. flag to relay without a DirPort; this was bad because such relays
  2266. can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
  2267. on 0.2.6.3-alpha.
  2268. o Minor features (clock-jump tolerance):
  2269. - Recover better when our clock jumps back many hours, like might
  2270. happen for Tails or Whonix users who start with a very wrong
  2271. hardware clock, use Tor to discover a more accurate time, and then
  2272. fix their clock. Resolves part of ticket 8766.
  2273. o Minor features (command-line interface):
  2274. - Make --hash-password imply --hush to prevent unnecessary noise.
  2275. Closes ticket 15542. Patch from "cypherpunks".
  2276. - Print a warning whenever we find a relative file path being used
  2277. as torrc option. Resolves issue 14018.
  2278. o Minor features (controller):
  2279. - Add DirAuthority lines for default directory authorities to the
  2280. output of the "GETINFO config/defaults" command if not already
  2281. present. Implements ticket 14840.
  2282. - Controllers can now use "GETINFO hs/client/desc/id/..." to
  2283. retrieve items from the client's hidden service descriptor cache.
  2284. Closes ticket 14845.
  2285. - Implement a new controller command "GETINFO status/fresh-relay-
  2286. descs" to fetch a descriptor/extrainfo pair that was generated on
  2287. demand just for the controller's use. Implements ticket 14784.
  2288. o Minor features (DoS-resistance):
  2289. - Make it harder for attackers to overload hidden services with
  2290. introductions, by blocking multiple introduction requests on the
  2291. same circuit. Resolves ticket 15515.
  2292. o Minor features (geoip):
  2293. - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
  2294. - Update geoip6 to the April 8 2015 Maxmind GeoLite2
  2295. Country database.
  2296. o Minor features (HS popularity countermeasure):
  2297. - To avoid leaking HS popularity, don't cycle the introduction point
  2298. when we've handled a fixed number of INTRODUCE2 cells but instead
  2299. cycle it when a random number of introductions is reached, thus
  2300. making it more difficult for an attacker to find out the amount of
  2301. clients that have used the introduction point for a specific HS.
  2302. Closes ticket 15745.
  2303. o Minor features (logging):
  2304. - Include the Tor version in all LD_BUG log messages, since people
  2305. tend to cut and paste those into the bugtracker. Implements
  2306. ticket 15026.
  2307. o Minor features (pluggable transports):
  2308. - When launching managed pluggable transports on Linux systems,
  2309. attempt to have the kernel deliver a SIGTERM on tor exit if the
  2310. pluggable transport process is still running. Resolves
  2311. ticket 15471.
  2312. - When launching managed pluggable transports, setup a valid open
  2313. stdin in the child process that can be used to detect if tor has
  2314. terminated. The "TOR_PT_EXIT_ON_STDIN_CLOSE" environment variable
  2315. can be used by implementations to detect this new behavior.
  2316. Resolves ticket 15435.
  2317. o Minor features (testing):
  2318. - Add a test to verify that the compiler does not eliminate our
  2319. memwipe() implementation. Closes ticket 15377.
  2320. - Add make rule `check-changes` to verify the format of changes
  2321. files. Closes ticket 15180.
  2322. - Add unit tests for control_event_is_interesting(). Add a compile-
  2323. time check that the number of events doesn't exceed the capacity
  2324. of control_event_t.event_mask. Closes ticket 15431, checks for
  2325. bugs similar to 13085. Patch by "teor".
  2326. - Command-line argument tests moved to Stem. Resolves ticket 14806.
  2327. - Integrate the ntor, backtrace, and zero-length keys tests into the
  2328. automake test suite. Closes ticket 15344.
  2329. - Remove assertions during builds to determine Tor's test coverage.
  2330. We don't want to trigger these even in assertions, so including
  2331. them artificially makes our branch coverage look worse than it is.
  2332. This patch provides the new test-stem-full and coverage-html-full
  2333. configure options. Implements ticket 15400.
  2334. o Minor bugfixes (build):
  2335. - Improve out-of-tree builds by making non-standard rules work and
  2336. clean up additional files and directories. Fixes bug 15053; bugfix
  2337. on 0.2.7.0-alpha.
  2338. o Minor bugfixes (command-line interface):
  2339. - When "--quiet" is provided along with "--validate-config", do not
  2340. write anything to stdout on success. Fixes bug 14994; bugfix
  2341. on 0.2.3.3-alpha.
  2342. - When complaining about bad arguments to "--dump-config", use
  2343. stderr, not stdout.
  2344. o Minor bugfixes (configuration, unit tests):
  2345. - Only add the default fallback directories when the DirAuthorities,
  2346. AlternateDirAuthority, and FallbackDir directory config options
  2347. are set to their defaults. The default fallback directory list is
  2348. currently empty, this fix will only change tor's behavior when it
  2349. has default fallback directories. Includes unit tests for
  2350. consider_adding_dir_servers(). Fixes bug 15642; bugfix on
  2351. 90f6071d8dc0 in 0.2.4.7-alpha. Patch by "teor".
  2352. o Minor bugfixes (correctness):
  2353. - For correctness, avoid modifying a constant string in
  2354. handle_control_postdescriptor. Fixes bug 15546; bugfix
  2355. on 0.1.1.16-rc.
  2356. - Remove side-effects from tor_assert() calls. This was harmless,
  2357. because we never disable assertions, but it is bad style and
  2358. unnecessary. Fixes bug 15211; bugfix on 0.2.5.5, 0.2.2.36,
  2359. and 0.2.0.10.
  2360. o Minor bugfixes (hidden service):
  2361. - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
  2362. a client authorized hidden service. Fixes bug 15823; bugfix
  2363. on 0.2.1.6-alpha.
  2364. - Remove an extraneous newline character from the end of hidden
  2365. service descriptors. Fixes bug 15296; bugfix on 0.2.0.10-alpha.
  2366. o Minor bugfixes (interface):
  2367. - Print usage information for --dump-config when it is used without
  2368. an argument. Also, fix the error message to use different wording
  2369. and add newline at the end. Fixes bug 15541; bugfix
  2370. on 0.2.5.1-alpha.
  2371. o Minor bugfixes (logs):
  2372. - When building Tor under Clang, do not include an extra set of
  2373. parentheses in log messages that include function names. Fixes bug
  2374. 15269; bugfix on every released version of Tor when compiled with
  2375. recent enough Clang.
  2376. o Minor bugfixes (network):
  2377. - When attempting to use fallback technique for network interface
  2378. lookup, disregard loopback and multicast addresses since they are
  2379. unsuitable for public communications.
  2380. o Minor bugfixes (statistics):
  2381. - Disregard the ConnDirectionStatistics torrc options when Tor is
  2382. not a relay since in that mode of operation no sensible data is
  2383. being collected and because Tor might run into measurement hiccups
  2384. when running as a client for some time, then becoming a relay.
  2385. Fixes bug 15604; bugfix on 0.2.2.35.
  2386. o Minor bugfixes (test networks):
  2387. - When self-testing reachability, use ExtendAllowPrivateAddresses to
  2388. determine if local/private addresses imply reachability. The
  2389. previous fix used TestingTorNetwork, which implies
  2390. ExtendAllowPrivateAddresses, but this excluded rare configurations
  2391. where ExtendAllowPrivateAddresses is set but TestingTorNetwork is
  2392. not. Fixes bug 15771; bugfix on 0.2.6.1-alpha. Patch by "teor",
  2393. issue discovered by CJ Ess.
  2394. o Minor bugfixes (testing):
  2395. - Check for matching value in server response in ntor_ref.py. Fixes
  2396. bug 15591; bugfix on 0.2.4.8-alpha. Reported and fixed
  2397. by "joelanders".
  2398. - Set the severity correctly when testing
  2399. get_interface_addresses_ifaddrs() and
  2400. get_interface_addresses_win32(), so that the tests fail gracefully
  2401. instead of triggering an assertion. Fixes bug 15759; bugfix on
  2402. 0.2.6.3-alpha. Reported by Nicolas Derive.
  2403. o Code simplification and refactoring:
  2404. - Move the hacky fallback code out of get_interface_address6() into
  2405. separate function and get it covered with unit-tests. Resolves
  2406. ticket 14710.
  2407. - Refactor hidden service client-side cache lookup to intelligently
  2408. report its various failure cases, and disentangle failure cases
  2409. involving a lack of introduction points. Closes ticket 14391.
  2410. - Use our own Base64 encoder instead of OpenSSL's, to allow more
  2411. control over the output. Part of ticket 15652.
  2412. o Documentation:
  2413. - Improve the descriptions of statistics-related torrc options in
  2414. the manpage to describe rationale and possible uses cases. Fixes
  2415. issue 15550.
  2416. - Improve the layout and formatting of ./configure --help messages.
  2417. Closes ticket 15024. Patch from "cypherpunks".
  2418. - Standardize on the term "server descriptor" in the manual page.
  2419. Previously, we had used "router descriptor", "server descriptor",
  2420. and "relay descriptor" interchangeably. Part of ticket 14987.
  2421. o Removed code:
  2422. - Remove `USE_OPENSSL_BASE64` and the corresponding fallback code
  2423. and always use the internal Base64 decoder. The internal decoder
  2424. has been part of tor since 0.2.0.10-alpha, and no one should
  2425. be using the OpenSSL one. Part of ticket 15652.
  2426. - Remove the 'tor_strclear()' function; use memwipe() instead.
  2427. Closes ticket 14922.
  2428. o Removed features:
  2429. - Remove the (seldom-used) DynamicDHGroups feature. For anti-
  2430. fingerprinting we now recommend pluggable transports; for forward-
  2431. secrecy in TLS, we now use the P-256 group. Closes ticket 13736.
  2432. - Remove the undocumented "--digests" command-line option. It
  2433. complicated our build process, caused subtle build issues on
  2434. multiple platforms, and is now redundant since we started
  2435. including git version identifiers. Closes ticket 14742.
  2436. - Tor no longer contains checks for ancient directory cache versions
  2437. that didn't know about microdescriptors.
  2438. - Tor no longer contains workarounds for stat files generated by
  2439. super-old versions of Tor that didn't choose guards sensibly.
  2440. Changes in version 0.2.4.27 - 2015-04-06
  2441. Tor 0.2.4.27 backports two fixes from 0.2.6.7 for security issues that
  2442. could be used by an attacker to crash hidden services, or crash clients
  2443. visiting hidden services. Hidden services should upgrade as soon as
  2444. possible; clients should upgrade whenever packages become available.
  2445. This release also backports a simple improvement to make hidden
  2446. services a bit less vulnerable to denial-of-service attacks.
  2447. o Major bugfixes (security, hidden service):
  2448. - Fix an issue that would allow a malicious client to trigger an
  2449. assertion failure and halt a hidden service. Fixes bug 15600;
  2450. bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
  2451. - Fix a bug that could cause a client to crash with an assertion
  2452. failure when parsing a malformed hidden service descriptor. Fixes
  2453. bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
  2454. o Minor features (DoS-resistance, hidden service):
  2455. - Introduction points no longer allow multiple INTRODUCE1 cells to
  2456. arrive on the same circuit. This should make it more expensive for
  2457. attackers to overwhelm hidden services with introductions.
  2458. Resolves ticket 15515.
  2459. Changes in version 0.2.5.12 - 2015-04-06
  2460. Tor 0.2.5.12 backports two fixes from 0.2.6.7 for security issues that
  2461. could be used by an attacker to crash hidden services, or crash clients
  2462. visiting hidden services. Hidden services should upgrade as soon as
  2463. possible; clients should upgrade whenever packages become available.
  2464. This release also backports a simple improvement to make hidden
  2465. services a bit less vulnerable to denial-of-service attacks.
  2466. o Major bugfixes (security, hidden service):
  2467. - Fix an issue that would allow a malicious client to trigger an
  2468. assertion failure and halt a hidden service. Fixes bug 15600;
  2469. bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
  2470. - Fix a bug that could cause a client to crash with an assertion
  2471. failure when parsing a malformed hidden service descriptor. Fixes
  2472. bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
  2473. o Minor features (DoS-resistance, hidden service):
  2474. - Introduction points no longer allow multiple INTRODUCE1 cells to
  2475. arrive on the same circuit. This should make it more expensive for
  2476. attackers to overwhelm hidden services with introductions.
  2477. Resolves ticket 15515.
  2478. Changes in version 0.2.6.7 - 2015-04-06
  2479. Tor 0.2.6.7 fixes two security issues that could be used by an
  2480. attacker to crash hidden services, or crash clients visiting hidden
  2481. services. Hidden services should upgrade as soon as possible; clients
  2482. should upgrade whenever packages become available.
  2483. This release also contains two simple improvements to make hidden
  2484. services a bit less vulnerable to denial-of-service attacks.
  2485. o Major bugfixes (security, hidden service):
  2486. - Fix an issue that would allow a malicious client to trigger an
  2487. assertion failure and halt a hidden service. Fixes bug 15600;
  2488. bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
  2489. - Fix a bug that could cause a client to crash with an assertion
  2490. failure when parsing a malformed hidden service descriptor. Fixes
  2491. bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
  2492. o Minor features (DoS-resistance, hidden service):
  2493. - Introduction points no longer allow multiple INTRODUCE1 cells to
  2494. arrive on the same circuit. This should make it more expensive for
  2495. attackers to overwhelm hidden services with introductions.
  2496. Resolves ticket 15515.
  2497. - Decrease the amount of reattempts that a hidden service performs
  2498. when its rendezvous circuits fail. This reduces the computational
  2499. cost for running a hidden service under heavy load. Resolves
  2500. ticket 11447.
  2501. Changes in version 0.2.6.6 - 2015-03-24
  2502. Tor 0.2.6.6 is the first stable release in the 0.2.6 series.
  2503. It adds numerous safety, security, correctness, and performance
  2504. improvements. Client programs can be configured to use more kinds of
  2505. sockets, AutomapHosts works better, the multithreading backend is
  2506. improved, cell transmission is refactored, test coverage is much
  2507. higher, more denial-of-service attacks are handled, guard selection is
  2508. improved to handle long-term guards better, pluggable transports
  2509. should work a bit better, and some annoying hidden service performance
  2510. bugs should be addressed.
  2511. o Minor bugfixes (portability):
  2512. - Use the correct datatype in the SipHash-2-4 function to prevent
  2513. compilers from assuming any sort of alignment. Fixes bug 15436;
  2514. bugfix on 0.2.5.3-alpha.
  2515. Changes in version 0.2.6.5-rc - 2015-03-18
  2516. Tor 0.2.6.5-rc is the second and (hopefully) last release candidate in
  2517. the 0.2.6. It fixes a small number of bugs found in 0.2.6.4-rc.
  2518. o Major bugfixes (client):
  2519. - Avoid crashing when making certain configuration option changes on
  2520. clients. Fixes bug 15245; bugfix on 0.2.6.3-alpha. Reported
  2521. by "anonym".
  2522. o Major bugfixes (pluggable transports):
  2523. - Initialize the extended OR Port authentication cookie before
  2524. launching pluggable transports. This prevents a race condition
  2525. that occured when server-side pluggable transports would cache the
  2526. authentication cookie before it has been (re)generated. Fixes bug
  2527. 15240; bugfix on 0.2.5.1-alpha.
  2528. o Major bugfixes (portability):
  2529. - Do not crash on startup when running on Solaris. Fixes a bug
  2530. related to our fix for 9495; bugfix on 0.2.6.1-alpha. Reported
  2531. by "ruebezahl".
  2532. o Minor features (heartbeat):
  2533. - On relays, report how many connections we negotiated using each
  2534. version of the Tor link protocols. This information will let us
  2535. know if removing support for very old versions of the Tor
  2536. protocols is harming the network. Closes ticket 15212.
  2537. o Code simplification and refactoring:
  2538. - Refactor main loop to extract the 'loop' part. This makes it
  2539. easier to run Tor under Shadow. Closes ticket 15176.
  2540. Changes in version 0.2.5.11 - 2015-03-17
  2541. Tor 0.2.5.11 is the second stable release in the 0.2.5 series.
  2542. It backports several bugfixes from the 0.2.6 branch, including a
  2543. couple of medium-level security fixes for relays and exit nodes.
  2544. It also updates the list of directory authorities.
  2545. o Directory authority changes:
  2546. - Remove turtles as a directory authority.
  2547. - Add longclaw as a new (v3) directory authority. This implements
  2548. ticket 13296. This keeps the directory authority count at 9.
  2549. - The directory authority Faravahar has a new IP address. This
  2550. closes ticket 14487.
  2551. o Major bugfixes (crash, OSX, security):
  2552. - Fix a remote denial-of-service opportunity caused by a bug in
  2553. OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
  2554. in OSX 10.9.
  2555. o Major bugfixes (relay, stability, possible security):
  2556. - Fix a bug that could lead to a relay crashing with an assertion
  2557. failure if a buffer of exactly the wrong layout was passed to
  2558. buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
  2559. 0.2.0.10-alpha. Patch from 'cypherpunks'.
  2560. - Do not assert if the 'data' pointer on a buffer is advanced to the
  2561. very end of the buffer; log a BUG message instead. Only assert if
  2562. it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
  2563. o Major bugfixes (exit node stability):
  2564. - Fix an assertion failure that could occur under high DNS load.
  2565. Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
  2566. diagnosed and fixed by "cypherpunks".
  2567. o Major bugfixes (Linux seccomp2 sandbox):
  2568. - Upon receiving sighup with the seccomp2 sandbox enabled, do not
  2569. crash during attempts to call wait4. Fixes bug 15088; bugfix on
  2570. 0.2.5.1-alpha. Patch from "sanic".
  2571. o Minor features (controller):
  2572. - New "GETINFO bw-event-cache" to get information about recent
  2573. bandwidth events. Closes ticket 14128. Useful for controllers to
  2574. get recent bandwidth history after the fix for ticket 13988.
  2575. o Minor features (geoip):
  2576. - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
  2577. - Update geoip6 to the March 3 2015 Maxmind GeoLite2
  2578. Country database.
  2579. o Minor bugfixes (client, automapping):
  2580. - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
  2581. no value follows the option. Fixes bug 14142; bugfix on
  2582. 0.2.4.7-alpha. Patch by "teor".
  2583. - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
  2584. 14195; bugfix on 0.1.0.1-rc.
  2585. o Minor bugfixes (compilation):
  2586. - Build without warnings with the stock OpenSSL srtp.h header, which
  2587. has a duplicate declaration of SSL_get_selected_srtp_profile().
  2588. Fixes bug 14220; this is OpenSSL's bug, not ours.
  2589. o Minor bugfixes (directory authority):
  2590. - Allow directory authorities to fetch more data from one another if
  2591. they find themselves missing lots of votes. Previously, they had
  2592. been bumping against the 10 MB queued data limit. Fixes bug 14261;
  2593. bugfix on 0.1.2.5-alpha.
  2594. - Enlarge the buffer to read bwauth generated files to avoid an
  2595. issue when parsing the file in dirserv_read_measured_bandwidths().
  2596. Fixes bug 14125; bugfix on 0.2.2.1-alpha.
  2597. o Minor bugfixes (statistics):
  2598. - Increase period over which bandwidth observations are aggregated
  2599. from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
  2600. o Minor bugfixes (preventative security, C safety):
  2601. - When reading a hexadecimal, base-32, or base-64 encoded value from
  2602. a string, always overwrite the whole output buffer. This prevents
  2603. some bugs where we would look at (but fortunately, not reveal)
  2604. uninitialized memory on the stack. Fixes bug 14013; bugfix on all
  2605. versions of Tor.
  2606. Changes in version 0.2.4.26 - 2015-03-17
  2607. Tor 0.2.4.26 includes an updated list of directory authorities. It
  2608. also backports a couple of stability and security bugfixes from 0.2.5
  2609. and beyond.
  2610. o Directory authority changes:
  2611. - Remove turtles as a directory authority.
  2612. - Add longclaw as a new (v3) directory authority. This implements
  2613. ticket 13296. This keeps the directory authority count at 9.
  2614. - The directory authority Faravahar has a new IP address. This
  2615. closes ticket 14487.
  2616. o Major bugfixes (exit node stability, also in 0.2.6.3-alpha):
  2617. - Fix an assertion failure that could occur under high DNS load.
  2618. Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
  2619. diagnosed and fixed by "cypherpunks".
  2620. o Major bugfixes (relay, stability, possible security, also in 0.2.6.4-rc):
  2621. - Fix a bug that could lead to a relay crashing with an assertion
  2622. failure if a buffer of exactly the wrong layout was passed to
  2623. buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
  2624. 0.2.0.10-alpha. Patch from 'cypherpunks'.
  2625. - Do not assert if the 'data' pointer on a buffer is advanced to the
  2626. very end of the buffer; log a BUG message instead. Only assert if
  2627. it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
  2628. o Minor features (geoip):
  2629. - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
  2630. - Update geoip6 to the March 3 2015 Maxmind GeoLite2
  2631. Country database.
  2632. Changes in version 0.2.6.4-rc - 2015-03-09
  2633. Tor 0.2.6.4-alpha fixes an issue in the directory code that an
  2634. attacker might be able to use in order to crash certain Tor
  2635. directories. It also resolves some minor issues left over from, or
  2636. introduced in, Tor 0.2.6.3-alpha or earlier.
  2637. o Major bugfixes (crash, OSX, security):
  2638. - Fix a remote denial-of-service opportunity caused by a bug in
  2639. OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
  2640. in OSX 10.9.
  2641. o Major bugfixes (relay, stability, possible security):
  2642. - Fix a bug that could lead to a relay crashing with an assertion
  2643. failure if a buffer of exactly the wrong layout is passed to
  2644. buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
  2645. 0.2.0.10-alpha. Patch from "cypherpunks".
  2646. - Do not assert if the 'data' pointer on a buffer is advanced to the
  2647. very end of the buffer; log a BUG message instead. Only assert if
  2648. it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
  2649. o Major bugfixes (FreeBSD IPFW transparent proxy):
  2650. - Fix address detection with FreeBSD transparent proxies, when
  2651. "TransProxyType ipfw" is in use. Fixes bug 15064; bugfix
  2652. on 0.2.5.4-alpha.
  2653. o Major bugfixes (Linux seccomp2 sandbox):
  2654. - Pass IPPROTO_TCP rather than 0 to socket(), so that the Linux
  2655. seccomp2 sandbox doesn't fail. Fixes bug 14989; bugfix
  2656. on 0.2.6.3-alpha.
  2657. - Allow AF_UNIX hidden services to be used with the seccomp2
  2658. sandbox. Fixes bug 15003; bugfix on 0.2.6.3-alpha.
  2659. - Upon receiving sighup with the seccomp2 sandbox enabled, do not
  2660. crash during attempts to call wait4. Fixes bug 15088; bugfix on
  2661. 0.2.5.1-alpha. Patch from "sanic".
  2662. o Minor features (controller):
  2663. - Messages about problems in the bootstrap process now include
  2664. information about the server we were trying to connect to when we
  2665. noticed the problem. Closes ticket 15006.
  2666. o Minor features (geoip):
  2667. - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
  2668. - Update geoip6 to the March 3 2015 Maxmind GeoLite2
  2669. Country database.
  2670. o Minor features (logs):
  2671. - Quiet some log messages in the heartbeat and at startup. Closes
  2672. ticket 14950.
  2673. o Minor bugfixes (certificate handling):
  2674. - If an authority operator accidentally makes a signing certificate
  2675. with a future publication time, do not discard its real signing
  2676. certificates. Fixes bug 11457; bugfix on 0.2.0.3-alpha.
  2677. - Remove any old authority certificates that have been superseded
  2678. for at least two days. Previously, we would keep superseded
  2679. certificates until they expired, if they were published close in
  2680. time to the certificate that superseded them. Fixes bug 11454;
  2681. bugfix on 0.2.1.8-alpha.
  2682. o Minor bugfixes (compilation):
  2683. - Fix a compilation warning on s390. Fixes bug 14988; bugfix
  2684. on 0.2.5.2-alpha.
  2685. - Fix a compilation warning on FreeBSD. Fixes bug 15151; bugfix
  2686. on 0.2.6.2-alpha.
  2687. o Minor bugfixes (testing):
  2688. - Fix endianness issues in unit test for resolve_my_address() to
  2689. have it pass on big endian systems. Fixes bug 14980; bugfix on
  2690. Tor 0.2.6.3-alpha.
  2691. - Avoid a side-effect in a tor_assert() in the unit tests. Fixes bug
  2692. 15188; bugfix on 0.1.2.3-alpha. Patch from Tom van der Woerdt.
  2693. - When running the new 'make test-stem' target, use the configured
  2694. python binary. Fixes bug 15037; bugfix on 0.2.6.3-alpha. Patch
  2695. from "cypherpunks".
  2696. - When running the zero-length-keys tests, do not use the default
  2697. torrc file. Fixes bug 15033; bugfix on 0.2.6.3-alpha. Reported
  2698. by "reezer".
  2699. o Directory authority IP change:
  2700. - The directory authority Faravahar has a new IP address. This
  2701. closes ticket 14487.
  2702. o Removed code:
  2703. - Remove some lingering dead code that once supported mempools.
  2704. Mempools were disabled by default in 0.2.5, and removed entirely
  2705. in 0.2.6.3-alpha. Closes more of ticket 14848; patch
  2706. by "cypherpunks".
  2707. Changes in version 0.2.6.3-alpha - 2015-02-19
  2708. Tor 0.2.6.3-alpha is the third (and hopefully final) alpha release in
  2709. the 0.2.6.x series. It introduces support for more kinds of sockets,
  2710. makes it harder to accidentally run an exit, improves our
  2711. multithreading backend, incorporates several fixes for the
  2712. AutomapHostsOnResolve option, and fixes numerous other bugs besides.
  2713. If no major regressions or security holes are found in this version,
  2714. the next version will be a release candidate.
  2715. o Deprecated versions:
  2716. - Tor relays older than 0.2.4.18-rc are no longer allowed to
  2717. advertise themselves on the network. Closes ticket 13555.
  2718. o Major features (security, unix domain sockets):
  2719. - Allow SocksPort to be an AF_UNIX Unix Domain Socket. Now high risk
  2720. applications can reach Tor without having to create AF_INET or
  2721. AF_INET6 sockets, meaning they can completely disable their
  2722. ability to make non-Tor network connections. To create a socket of
  2723. this type, use "SocksPort unix:/path/to/socket". Implements
  2724. ticket 12585.
  2725. - Support mapping hidden service virtual ports to AF_UNIX sockets.
  2726. The syntax is "HiddenServicePort 80 unix:/path/to/socket".
  2727. Implements ticket 11485.
  2728. o Major features (changed defaults):
  2729. - Prevent relay operators from unintentionally running exits: When a
  2730. relay is configured as an exit node, we now warn the user unless
  2731. the "ExitRelay" option is set to 1. We warn even more loudly if
  2732. the relay is configured with the default exit policy, since this
  2733. can indicate accidental misconfiguration. Setting "ExitRelay 0"
  2734. stops Tor from running as an exit relay. Closes ticket 10067.
  2735. o Major features (directory system):
  2736. - When downloading server- or microdescriptors from a directory
  2737. server, we no longer launch multiple simultaneous requests to the
  2738. same server. This reduces load on the directory servers,
  2739. especially when directory guards are in use. Closes ticket 9969.
  2740. - When downloading server- or microdescriptors over a tunneled
  2741. connection, do not limit the length of our requests to what the
  2742. Squid proxy is willing to handle. Part of ticket 9969.
  2743. - Authorities can now vote on the correct digests and latest
  2744. versions for different software packages. This allows packages
  2745. that include Tor to use the Tor authority system as a way to get
  2746. notified of updates and their correct digests. Implements proposal
  2747. 227. Closes ticket 10395.
  2748. o Major features (guards):
  2749. - Introduce the Guardfraction feature to improves load balancing on
  2750. guard nodes. Specifically, it aims to reduce the traffic gap that
  2751. guard nodes experience when they first get the Guard flag. This is
  2752. a required step if we want to increase the guard lifetime to 9
  2753. months or greater. Closes ticket 9321.
  2754. o Major features (performance):
  2755. - Make the CPU worker implementation more efficient by avoiding the
  2756. kernel and lengthening pipelines. The original implementation used
  2757. sockets to transfer data from the main thread to the workers, and
  2758. didn't allow any thread to be assigned more than a single piece of
  2759. work at once. The new implementation avoids communications
  2760. overhead by making requests in shared memory, avoiding kernel IO
  2761. where possible, and keeping more requests in flight at once.
  2762. Implements ticket 9682.
  2763. o Major features (relay):
  2764. - Raise the minimum acceptable configured bandwidth rate for bridges
  2765. to 50 KiB/sec and for relays to 75 KiB/sec. (The old values were
  2766. 20 KiB/sec.) Closes ticket 13822.
  2767. o Major bugfixes (exit node stability):
  2768. - Fix an assertion failure that could occur under high DNS load.
  2769. Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
  2770. diagnosed and fixed by "cypherpunks".
  2771. o Major bugfixes (mixed relay-client operation):
  2772. - When running as a relay and client at the same time (not
  2773. recommended), if we decide not to use a new guard because we want
  2774. to retry older guards, only close the locally-originating circuits
  2775. passing through that guard. Previously we would close all the
  2776. circuits through that guard. Fixes bug 9819; bugfix on
  2777. 0.2.1.1-alpha. Reported by "skruffy".
  2778. o Minor features (build):
  2779. - New --disable-system-torrc compile-time option to prevent Tor from
  2780. looking for the system-wide torrc or torrc-defaults files.
  2781. Resolves ticket 13037.
  2782. o Minor features (controller):
  2783. - Include SOCKS_USERNAME and SOCKS_PASSWORD values in controller
  2784. events so controllers can observe circuit isolation inputs. Closes
  2785. ticket 8405.
  2786. - ControlPort now supports the unix:/path/to/socket syntax as an
  2787. alternative to the ControlSocket option, for consistency with
  2788. SocksPort and HiddenServicePort. Closes ticket 14451.
  2789. - New "GETINFO bw-event-cache" to get information about recent
  2790. bandwidth events. Closes ticket 14128. Useful for controllers to
  2791. get recent bandwidth history after the fix for ticket 13988.
  2792. o Minor features (Denial of service resistance):
  2793. - Count the total number of bytes used storing hidden service
  2794. descriptors against the value of MaxMemInQueues. If we're low on
  2795. memory, and more than 20% of our memory is used holding hidden
  2796. service descriptors, free them until no more than 10% of our
  2797. memory holds hidden service descriptors. Free the least recently
  2798. fetched descriptors first. Resolves ticket 13806.
  2799. - When we have recently been under memory pressure (over 3/4 of
  2800. MaxMemInQueues is allocated), then allocate smaller zlib objects
  2801. for small requests. Closes ticket 11791.
  2802. o Minor features (geoip):
  2803. - Update geoip and geoip6 files to the January 7 2015 Maxmind
  2804. GeoLite2 Country database.
  2805. o Minor features (guard nodes):
  2806. - Reduce the time delay before saving guard status to disk from 10
  2807. minutes to 30 seconds (or from one hour to 10 minutes if
  2808. AvoidDiskWrites is set). Closes ticket 12485.
  2809. o Minor features (hidden service):
  2810. - Make Sybil attacks against hidden services harder by changing the
  2811. minimum time required to get the HSDir flag from 25 hours up to 96
  2812. hours. Addresses ticket 14149.
  2813. - New option "HiddenServiceAllowUnknownPorts" to allow hidden
  2814. services to disable the anti-scanning feature introduced in
  2815. 0.2.6.2-alpha. With this option not set, a connection to an
  2816. unlisted port closes the circuit. With this option set, only a
  2817. RELAY_DONE cell is sent. Closes ticket 14084.
  2818. o Minor features (interface):
  2819. - Implement "-f -" command-line option to read torrc configuration
  2820. from standard input, if you don't want to store the torrc file in
  2821. the file system. Implements feature 13865.
  2822. o Minor features (logging):
  2823. - Add a count of unique clients to the bridge heartbeat message.
  2824. Resolves ticket 6852.
  2825. - Suppress "router info incompatible with extra info" message when
  2826. reading extrainfo documents from cache. (This message got loud
  2827. around when we closed bug 9812 in 0.2.6.2-alpha.) Closes
  2828. ticket 13762.
  2829. - Elevate hidden service authorized-client message from DEBUG to
  2830. INFO. Closes ticket 14015.
  2831. o Minor features (stability):
  2832. - Add assertions in our hash-table iteration code to check for
  2833. corrupted values that could cause infinite loops. Closes
  2834. ticket 11737.
  2835. o Minor features (systemd):
  2836. - Various improvements and modernizations in systemd hardening
  2837. support. Closes ticket 13805. Patch from Craig Andrews.
  2838. o Minor features (testing networks):
  2839. - Drop the minimum RendPostPeriod on a testing network to 5 seconds,
  2840. and the default on a testing network to 2 minutes. Drop the
  2841. MIN_REND_INITIAL_POST_DELAY on a testing network to 5 seconds, but
  2842. keep the default on a testing network at 30 seconds. This reduces
  2843. HS bootstrap time to around 25 seconds. Also, change the default
  2844. time in test-network.sh to match. Closes ticket 13401. Patch
  2845. by "teor".
  2846. - Create TestingDirAuthVoteHSDir to correspond to
  2847. TestingDirAuthVoteExit/Guard. Ensures that authorities vote the
  2848. HSDir flag for the listed relays regardless of uptime or ORPort
  2849. connectivity. Respects the value of VoteOnHidServDirectoriesV2.
  2850. Partial implementation for ticket 14067. Patch by "teor".
  2851. o Minor features (tor2web mode):
  2852. - Introduce the config option Tor2webRendezvousPoints, which allows
  2853. clients in Tor2webMode to select a specific Rendezvous Point to be
  2854. used in HS circuits. This might allow better performance for
  2855. Tor2Web nodes. Implements ticket 12844.
  2856. o Minor bugfixes (client DNS):
  2857. - Report the correct cached DNS expiration times on SOCKS port or in
  2858. DNS replies. Previously, we would report everything as "never
  2859. expires." Fixes bug 14193; bugfix on 0.2.3.17-beta.
  2860. - Avoid a small memory leak when we find a cached answer for a
  2861. reverse DNS lookup in a client-side DNS cache. (Remember, client-
  2862. side DNS caching is off by default, and is not recommended.) Fixes
  2863. bug 14259; bugfix on 0.2.0.1-alpha.
  2864. o Minor bugfixes (client, automapping):
  2865. - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
  2866. no value follows the option. Fixes bug 14142; bugfix on
  2867. 0.2.4.7-alpha. Patch by "teor".
  2868. - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
  2869. 14195; bugfix on 0.1.0.1-rc.
  2870. - Prevent changes to other options from removing the wildcard value
  2871. "." from "AutomapHostsSuffixes". Fixes bug 12509; bugfix
  2872. on 0.2.0.1-alpha.
  2873. - Allow MapAddress and AutomapHostsOnResolve to work together when
  2874. an address is mapped into another address type (like .onion) that
  2875. must be automapped at resolve time. Fixes bug 7555; bugfix
  2876. on 0.2.0.1-alpha.
  2877. o Minor bugfixes (client, bridges):
  2878. - When we are using bridges and we had a network connectivity
  2879. problem, only retry connecting to our currently configured
  2880. bridges, not all bridges we know about and remember using. Fixes
  2881. bug 14216; bugfix on 0.2.2.17-alpha.
  2882. o Minor bugfixes (client, IPv6):
  2883. - Reject socks requests to literal IPv6 addresses when IPv6Traffic
  2884. flag is not set; and not because the NoIPv4Traffic flag was set.
  2885. Previously we'd looked at the NoIPv4Traffic flag for both types of
  2886. literal addresses. Fixes bug 14280; bugfix on 0.2.4.7-alpha.
  2887. o Minor bugfixes (compilation):
  2888. - The address of an array in the middle of a structure will always
  2889. be non-NULL. clang recognises this and complains. Disable the
  2890. tautologous and redundant check to silence this warning. Fixes bug
  2891. 14001; bugfix on 0.2.1.2-alpha.
  2892. - Avoid warnings when building with systemd 209 or later. Fixes bug
  2893. 14072; bugfix on 0.2.6.2-alpha. Patch from "h.venev".
  2894. - Compile correctly with (unreleased) OpenSSL 1.1.0 headers.
  2895. Addresses ticket 14188.
  2896. - Build without warnings with the stock OpenSSL srtp.h header, which
  2897. has a duplicate declaration of SSL_get_selected_srtp_profile().
  2898. Fixes bug 14220; this is OpenSSL's bug, not ours.
  2899. - Do not compile any code related to Tor2Web mode when Tor2Web mode
  2900. is not enabled at compile time. Previously, this code was included
  2901. in a disabled state. See discussion on ticket 12844.
  2902. - Remove the --disable-threads configure option again. It was
  2903. accidentally partially reintroduced in 29ac883606d6d. Fixes bug
  2904. 14819; bugfix on 0.2.6.2-alpha.
  2905. o Minor bugfixes (controller):
  2906. - Report "down" in response to the "GETINFO entry-guards" command
  2907. when relays are down with an unreachable_since value. Previously,
  2908. we would report "up". Fixes bug 14184; bugfix on 0.1.2.2-alpha.
  2909. - Avoid crashing on a malformed EXTENDCIRCUIT command. Fixes bug
  2910. 14116; bugfix on 0.2.2.9-alpha.
  2911. - Add a code for the END_CIRC_REASON_IP_NOW_REDUNDANT circuit close
  2912. reason. Fixes bug 14207; bugfix on 0.2.6.2-alpha.
  2913. o Minor bugfixes (directory authority):
  2914. - Allow directory authorities to fetch more data from one another if
  2915. they find themselves missing lots of votes. Previously, they had
  2916. been bumping against the 10 MB queued data limit. Fixes bug 14261;
  2917. bugfix on 0.1.2.5-alpha.
  2918. - Do not attempt to download extrainfo documents which we will be
  2919. unable to validate with a matching server descriptor. Fixes bug
  2920. 13762; bugfix on 0.2.0.1-alpha.
  2921. - Fix a bug that was truncating AUTHDIR_NEWDESC events sent to the
  2922. control port. Fixes bug 14953; bugfix on 0.2.0.1-alpha.
  2923. - Enlarge the buffer to read bwauth generated files to avoid an
  2924. issue when parsing the file in dirserv_read_measured_bandwidths().
  2925. Fixes bug 14125; bugfix on 0.2.2.1-alpha.
  2926. o Minor bugfixes (file handling):
  2927. - Stop failing when key files are zero-length. Instead, generate new
  2928. keys, and overwrite the empty key files. Fixes bug 13111; bugfix
  2929. on all versions of Tor. Patch by "teor".
  2930. - Stop generating a fresh .old RSA onion key file when the .old file
  2931. is missing. Fixes part of 13111; bugfix on 0.0.6rc1.
  2932. - Avoid overwriting .old key files with empty key files.
  2933. - Skip loading zero-length extrainfo store, router store, stats,
  2934. state, and key files.
  2935. - Avoid crashing when trying to reload a torrc specified as a
  2936. relative path with RunAsDaemon turned on. Fixes bug 13397; bugfix
  2937. on 0.2.3.11-alpha.
  2938. o Minor bugfixes (hidden services):
  2939. - Close the introduction circuit when we have no more usable intro
  2940. points, instead of waiting for it to time out. This also ensures
  2941. that no follow-up HS descriptor fetch is triggered when the
  2942. circuit eventually times out. Fixes bug 14224; bugfix on 0.0.6.
  2943. - When fetching a hidden service descriptor for a down service that
  2944. was recently up, do not keep refetching until we try the same
  2945. replica twice in a row. Fixes bug 14219; bugfix on 0.2.0.10-alpha.
  2946. - Successfully launch Tor with a nonexistent hidden service
  2947. directory. Our fix for bug 13942 didn't catch this case. Fixes bug
  2948. 14106; bugfix on 0.2.6.2-alpha.
  2949. o Minor bugfixes (logging):
  2950. - Avoid crashing when there are more log domains than entries in
  2951. domain_list. Bugfix on 0.2.3.1-alpha.
  2952. - Add a string representation for LD_SCHED. Fixes bug 14740; bugfix
  2953. on 0.2.6.1-alpha.
  2954. - Don't log messages to stdout twice when starting up. Fixes bug
  2955. 13993; bugfix on 0.2.6.1-alpha.
  2956. o Minor bugfixes (parsing):
  2957. - Stop accepting milliseconds (or other junk) at the end of
  2958. descriptor publication times. Fixes bug 9286; bugfix on 0.0.2pre25.
  2959. - Support two-number and three-number version numbers correctly, in
  2960. case we change the Tor versioning system in the future. Fixes bug
  2961. 13661; bugfix on 0.0.8pre1.
  2962. o Minor bugfixes (path counting):
  2963. - When deciding whether the consensus lists any exit nodes, count
  2964. the number listed in the consensus, not the number we have
  2965. descriptors for. Fixes part of bug 14918; bugfix on 0.2.6.2-alpha.
  2966. - When deciding whether we have any exit nodes, only examine
  2967. ExitNodes when the ExitNodes option is actually set. Fixes part of
  2968. bug 14918; bugfix on 0.2.6.2-alpha.
  2969. - Get rid of redundant and possibly scary warnings that we are
  2970. missing directory information while we bootstrap. Fixes part of
  2971. bug 14918; bugfix on 0.2.6.2-alpha.
  2972. o Minor bugfixes (portability):
  2973. - Fix the ioctl()-based network interface lookup code so that it
  2974. will work on systems that have variable-length struct ifreq, for
  2975. example Mac OS X.
  2976. - Fix scheduler compilation on targets where char is unsigned. Fixes
  2977. bug 14764; bugfix on 0.2.6.2-alpha. Reported by Christian Kujau.
  2978. o Minor bugfixes (sandbox):
  2979. - Allow glibc fatal errors to be sent to stderr before Tor exits.
  2980. Previously, glibc would try to write them to /dev/tty, and the
  2981. sandbox would trap the call and make Tor exit prematurely. Fixes
  2982. bug 14759; bugfix on 0.2.5.1-alpha.
  2983. o Minor bugfixes (shutdown):
  2984. - When shutting down, always call event_del() on lingering read or
  2985. write events before freeing them. Otherwise, we risk double-frees
  2986. or read-after-frees in event_base_free(). Fixes bug 12985; bugfix
  2987. on 0.1.0.2-rc.
  2988. o Minor bugfixes (small memory leaks):
  2989. - Avoid leaking memory when using IPv6 virtual address mappings.
  2990. Fixes bug 14123; bugfix on 0.2.4.7-alpha. Patch by Tom van
  2991. der Woerdt.
  2992. o Minor bugfixes (statistics):
  2993. - Increase period over which bandwidth observations are aggregated
  2994. from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
  2995. o Minor bugfixes (systemd support):
  2996. - Fix detection and operation of systemd watchdog. Fixes part of bug
  2997. 14141; bugfix on 0.2.6.2-alpha. Patch from Tomasz Torcz.
  2998. - Run correctly under systemd with the RunAsDaemon option set. Fixes
  2999. part of bug 14141; bugfix on 0.2.5.7-rc. Patch from Tomasz Torcz.
  3000. - Inform the systemd supervisor about more changes in the Tor
  3001. process status. Implements part of ticket 14141. Patch from
  3002. Tomasz Torcz.
  3003. - Cause the "--disable-systemd" option to actually disable systemd
  3004. support. Fixes bug 14350; bugfix on 0.2.6.2-alpha. Patch
  3005. from "blueness".
  3006. o Minor bugfixes (TLS):
  3007. - Check more thoroughly throughout the TLS code for possible
  3008. unlogged TLS errors. Possible diagnostic or fix for bug 13319.
  3009. o Minor bugfixes (transparent proxy):
  3010. - Use getsockname, not getsockopt, to retrieve the address for a
  3011. TPROXY-redirected connection. Fixes bug 13796; bugfix
  3012. on 0.2.5.2-alpha.
  3013. o Code simplification and refactoring:
  3014. - Move fields related to isolating and configuring client ports into
  3015. a shared structure. Previously, they were duplicated across
  3016. port_cfg_t, listener_connection_t, and edge_connection_t. Failure
  3017. to copy them correctly had been the cause of at least one bug in
  3018. the past. Closes ticket 8546.
  3019. - Refactor the get_interface_addresses_raw() doom-function into
  3020. multiple smaller and simpler subfunctions. Cover the resulting
  3021. subfunctions with unit-tests. Fixes a significant portion of
  3022. issue 12376.
  3023. - Remove workaround in dirserv_thinks_router_is_hs_dir() that was
  3024. only for version <= 0.2.2.24 which is now deprecated. Closes
  3025. ticket 14202.
  3026. - Remove a test for a long-defunct broken version-one
  3027. directory server.
  3028. o Documentation:
  3029. - Adding section on OpenBSD to our TUNING document. Thanks to mmcc
  3030. for writing the OpenBSD-specific tips. Resolves ticket 13702.
  3031. - Make the tor-resolve documentation match its help string and its
  3032. options. Resolves part of ticket 14325.
  3033. - Log a more useful error message from tor-resolve when failing to
  3034. look up a hidden service address. Resolves part of ticket 14325.
  3035. o Downgraded warnings:
  3036. - Don't warn when we've attempted to contact a relay using the wrong
  3037. ntor onion key. Closes ticket 9635.
  3038. o Removed features:
  3039. - To avoid confusion with the "ExitRelay" option, "ExitNode" is no
  3040. longer silently accepted as an alias for "ExitNodes".
  3041. - The --enable-mempool and --enable-buf-freelists options, which
  3042. were originally created to work around bad malloc implementations,
  3043. no longer exist. They were off-by-default in 0.2.5. Closes
  3044. ticket 14848.
  3045. o Testing:
  3046. - Make the checkdir/perms test complete successfully even if the
  3047. global umask is not 022. Fixes bug 14215; bugfix on 0.2.6.2-alpha.
  3048. - Test that tor does not fail when key files are zero-length. Check
  3049. that tor generates new keys, and overwrites the empty key files.
  3050. - Test that tor generates new keys when keys are missing
  3051. (existing behavior).
  3052. - Test that tor does not overwrite key files that already contain
  3053. data (existing behavior). Tests bug 13111. Patch by "teor".
  3054. - New "make test-stem" target to run stem integration tests.
  3055. Requires that the "STEM_SOURCE_DIR" environment variable be set.
  3056. Closes ticket 14107.
  3057. - Make the test_cmdline_args.py script work correctly on Windows.
  3058. Patch from Gisle Vanem.
  3059. - Move the slower unit tests into a new "./src/test/test-slow"
  3060. binary that can be run independently of the other tests. Closes
  3061. ticket 13243.
  3062. - Avoid undefined behavior when sampling huge values from the
  3063. Laplace distribution. This made unittests fail on Raspberry Pi.
  3064. Bug found by Device. Fixes bug 14090; bugfix on 0.2.6.2-alpha.
  3065. Changes in version 0.2.6.2-alpha - 2014-12-31
  3066. Tor 0.2.6.2-alpha is the second alpha release in the 0.2.6.x series.
  3067. It introduces a major new backend for deciding when to send cells on
  3068. channels, which should lead down the road to big performance
  3069. increases. It contains security and statistics features for better
  3070. work on hidden services, and numerous bugfixes.
  3071. This release contains many new unit tests, along with major
  3072. performance improvements for running testing networks using Chutney.
  3073. Thanks to a series of patches contributed by "teor", testing networks
  3074. should now bootstrap in seconds, rather than minutes.
  3075. o Major features (relay, infrastructure):
  3076. - Complete revision of the code that relays use to decide which cell
  3077. to send next. Formerly, we selected the best circuit to write on
  3078. each channel, but we didn't select among channels in any
  3079. sophisticated way. Now, we choose the best circuits globally from
  3080. among those whose channels are ready to deliver traffic.
  3081. This patch implements a new inter-cmux comparison API, a global
  3082. high/low watermark mechanism and a global scheduler loop for
  3083. transmission prioritization across all channels as well as among
  3084. circuits on one channel. This schedule is currently tuned to
  3085. (tolerantly) avoid making changes in network performance, but it
  3086. should form the basis for major circuit performance increases in
  3087. the future. Code by Andrea; tuning by Rob Jansen; implements
  3088. ticket 9262.
  3089. o Major features (hidden services):
  3090. - Make HS port scanning more difficult by immediately closing the
  3091. circuit when a user attempts to connect to a nonexistent port.
  3092. Closes ticket 13667.
  3093. - Add a HiddenServiceStatistics option that allows Tor relays to
  3094. gather and publish statistics about the overall size and volume of
  3095. hidden service usage. Specifically, when this option is turned on,
  3096. an HSDir will publish an approximate number of hidden services
  3097. that have published descriptors to it the past 24 hours. Also, if
  3098. a relay has acted as a hidden service rendezvous point, it will
  3099. publish the approximate amount of rendezvous cells it has relayed
  3100. the past 24 hours. The statistics themselves are obfuscated so
  3101. that the exact values cannot be derived. For more details see
  3102. proposal 238, "Better hidden service stats from Tor relays". This
  3103. feature is currently disabled by default. Implements feature 13192.
  3104. o Major bugfixes (client, automap):
  3105. - Repair automapping with IPv6 addresses. This automapping should
  3106. have worked previously, but one piece of debugging code that we
  3107. inserted to detect a regression actually caused the regression to
  3108. manifest itself again. Fixes bug 13811 and bug 12831; bugfix on
  3109. 0.2.4.7-alpha. Diagnosed and fixed by Francisco Blas
  3110. Izquierdo Riera.
  3111. o Major bugfixes (hidden services):
  3112. - When closing an introduction circuit that was opened in parallel
  3113. with others, don't mark the introduction point as unreachable.
  3114. Previously, the first successful connection to an introduction
  3115. point would make the other introduction points get marked as
  3116. having timed out. Fixes bug 13698; bugfix on 0.0.6rc2.
  3117. o Directory authority changes:
  3118. - Remove turtles as a directory authority.
  3119. - Add longclaw as a new (v3) directory authority. This implements
  3120. ticket 13296. This keeps the directory authority count at 9.
  3121. o Major removed features:
  3122. - Tor clients no longer support connecting to hidden services
  3123. running on Tor 0.2.2.x and earlier; the Support022HiddenServices
  3124. option has been removed. (There shouldn't be any hidden services
  3125. running these versions on the network.) Closes ticket 7803.
  3126. o Minor features (client):
  3127. - Validate hostnames in SOCKS5 requests more strictly. If SafeSocks
  3128. is enabled, reject requests with IP addresses as hostnames.
  3129. Resolves ticket 13315.
  3130. o Minor features (controller):
  3131. - Add a "SIGNAL HEARTBEAT" controller command that tells Tor to
  3132. write an unscheduled heartbeat message to the log. Implements
  3133. feature 9503.
  3134. o Minor features (geoip):
  3135. - Update geoip and geoip6 to the November 15 2014 Maxmind GeoLite2
  3136. Country database.
  3137. o Minor features (hidden services):
  3138. - When re-enabling the network, don't try to build introduction
  3139. circuits until we have successfully built a circuit. This makes
  3140. hidden services come up faster when the network is re-enabled.
  3141. Patch from "akwizgran". Closes ticket 13447.
  3142. - When we fail to retrieve a hidden service descriptor, send the
  3143. controller an "HS_DESC FAILED" controller event. Implements
  3144. feature 13212.
  3145. - New HiddenServiceDirGroupReadable option to cause hidden service
  3146. directories and hostname files to be created group-readable. Patch
  3147. from "anon", David Stainton, and "meejah". Closes ticket 11291.
  3148. o Minor features (systemd):
  3149. - Where supported, when running with systemd, report successful
  3150. startup to systemd. Part of ticket 11016. Patch by Michael Scherer.
  3151. - When running with systemd, support systemd watchdog messages. Part
  3152. of ticket 11016. Patch by Michael Scherer.
  3153. o Minor features (transparent proxy):
  3154. - Update the transparent proxy option checks to allow for both ipfw
  3155. and pf on OS X. Closes ticket 14002.
  3156. - Use the correct option when using IPv6 with transparent proxy
  3157. support on Linux. Resolves 13808. Patch by Francisco Blas
  3158. Izquierdo Riera.
  3159. o Minor bugfixes (preventative security, C safety):
  3160. - When reading a hexadecimal, base-32, or base-64 encoded value from
  3161. a string, always overwrite the whole output buffer. This prevents
  3162. some bugs where we would look at (but fortunately, not reveal)
  3163. uninitialized memory on the stack. Fixes bug 14013; bugfix on all
  3164. versions of Tor.
  3165. - Clear all memory targetted by tor_addr_{to,from}_sockaddr(), not
  3166. just the part that's used. This makes it harder for data leak bugs
  3167. to occur in the event of other programming failures. Resolves
  3168. ticket 14041.
  3169. o Minor bugfixes (client, microdescriptors):
  3170. - Use a full 256 bits of the SHA256 digest of a microdescriptor when
  3171. computing which microdescriptors to download. This keeps us from
  3172. erroneous download behavior if two microdescriptor digests ever
  3173. have the same first 160 bits. Fixes part of bug 13399; bugfix
  3174. on 0.2.3.1-alpha.
  3175. - Reset a router's status if its microdescriptor digest changes,
  3176. even if the first 160 bits remain the same. Fixes part of bug
  3177. 13399; bugfix on 0.2.3.1-alpha.
  3178. o Minor bugfixes (compilation):
  3179. - Silence clang warnings under --enable-expensive-hardening,
  3180. including implicit truncation of 64 bit values to 32 bit, const
  3181. char assignment to self, tautological compare, and additional
  3182. parentheses around equality tests. Fixes bug 13577; bugfix
  3183. on 0.2.5.4-alpha.
  3184. - Fix a clang warning about checking whether an address in the
  3185. middle of a structure is NULL. Fixes bug 14001; bugfix
  3186. on 0.2.1.2-alpha.
  3187. o Minor bugfixes (hidden services):
  3188. - Correctly send a controller event when we find that a rendezvous
  3189. circuit has finished. Fixes bug 13936; bugfix on 0.1.1.5-alpha.
  3190. - Pre-check directory permissions for new hidden-services to avoid
  3191. at least one case of "Bug: Acting on config options left us in a
  3192. broken state. Dying." Fixes bug 13942; bugfix on 0.0.6pre1.
  3193. - When adding a new hidden service (for example, via SETCONF), Tor
  3194. no longer congratulates the user for running a relay. Fixes bug
  3195. 13941; bugfix on 0.2.6.1-alpha.
  3196. - When fetching hidden service descriptors, we now check not only
  3197. for whether we got the hidden service we had in mind, but also
  3198. whether we got the particular descriptors we wanted. This prevents
  3199. a class of inefficient but annoying DoS attacks by hidden service
  3200. directories. Fixes bug 13214; bugfix on 0.2.1.6-alpha. Reported
  3201. by "special".
  3202. o Minor bugfixes (Linux seccomp2 sandbox):
  3203. - Make transparent proxy support work along with the seccomp2
  3204. sandbox. Fixes part of bug 13808; bugfix on 0.2.5.1-alpha. Patch
  3205. by Francisco Blas Izquierdo Riera.
  3206. - Fix a memory leak in tor-resolve when running with the sandbox
  3207. enabled. Fixes bug 14050; bugfix on 0.2.5.9-rc.
  3208. o Minor bugfixes (logging):
  3209. - Downgrade warnings about RSA signature failures to info log level.
  3210. Emit a warning when an extra info document is found incompatible
  3211. with a corresponding router descriptor. Fixes bug 9812; bugfix
  3212. on 0.0.6rc3.
  3213. - Make connection_ap_handshake_attach_circuit() log the circuit ID
  3214. correctly. Fixes bug 13701; bugfix on 0.0.6.
  3215. o Minor bugfixes (misc):
  3216. - Stop allowing invalid address patterns like "*/24" that contain
  3217. both a wildcard address and a bit prefix length. This affects all
  3218. our address-range parsing code. Fixes bug 7484; bugfix
  3219. on 0.0.2pre14.
  3220. o Minor bugfixes (testing networks, fast startup):
  3221. - Allow Tor to build circuits using a consensus with no exits. If
  3222. the consensus has no exits (typical of a bootstrapping test
  3223. network), allow Tor to build circuits once enough descriptors have
  3224. been downloaded. This assists in bootstrapping a testing Tor
  3225. network. Fixes bug 13718; bugfix on 0.2.4.10-alpha. Patch
  3226. by "teor".
  3227. - When V3AuthVotingInterval is low, give a lower If-Modified-Since
  3228. header to directory servers. This allows us to obtain consensuses
  3229. promptly when the consensus interval is very short. This assists
  3230. in bootstrapping a testing Tor network. Fixes parts of bugs 13718
  3231. and 13963; bugfix on 0.2.0.3-alpha. Patch by "teor".
  3232. - Stop assuming that private addresses are local when checking
  3233. reachability in a TestingTorNetwork. Instead, when testing, assume
  3234. all OR connections are remote. (This is necessary due to many test
  3235. scenarios running all relays on localhost.) This assists in
  3236. bootstrapping a testing Tor network. Fixes bug 13924; bugfix on
  3237. 0.1.0.1-rc. Patch by "teor".
  3238. - Avoid building exit circuits from a consensus with no exits. Now
  3239. thanks to our fix for 13718, we accept a no-exit network as not
  3240. wholly lost, but we need to remember not to try to build exit
  3241. circuits on it. Closes ticket 13814; patch by "teor".
  3242. - Stop requiring exits to have non-zero bandwithcapacity in a
  3243. TestingTorNetwork. Instead, when TestingMinExitFlagThreshold is 0,
  3244. ignore exit bandwidthcapacity. This assists in bootstrapping a
  3245. testing Tor network. Fixes parts of bugs 13718 and 13839; bugfix
  3246. on 0.2.0.3-alpha. Patch by "teor".
  3247. - Add "internal" to some bootstrap statuses when no exits are
  3248. available. If the consensus does not contain Exits, Tor will only
  3249. build internal circuits. In this case, relevant statuses will
  3250. contain the word "internal" as indicated in the Tor control-
  3251. spec.txt. When bootstrap completes, Tor will be ready to build
  3252. internal circuits. If a future consensus contains Exits, exit
  3253. circuits may become available. Fixes part of bug 13718; bugfix on
  3254. 0.2.4.10-alpha. Patch by "teor".
  3255. - Decrease minimum consensus interval to 10 seconds when
  3256. TestingTorNetwork is set, or 5 seconds for the first consensus.
  3257. Fix assumptions throughout the code that assume larger intervals.
  3258. Fixes bugs 13718 and 13823; bugfix on 0.2.0.3-alpha. Patch
  3259. by "teor".
  3260. - Avoid excluding guards from path building in minimal test
  3261. networks, when we're in a test network and excluding guards would
  3262. exclude all relays. This typically occurs in incredibly small tor
  3263. networks, and those using "TestingAuthVoteGuard *". Fixes part of
  3264. bug 13718; bugfix on 0.1.1.11-alpha. Patch by "teor".
  3265. o Code simplification and refactoring:
  3266. - Stop using can_complete_circuits as a global variable; access it
  3267. with a function instead.
  3268. - Avoid using operators directly as macro arguments: this lets us
  3269. apply coccinelle transformations to our codebase more directly.
  3270. Closes ticket 13172.
  3271. - Combine the functions used to parse ClientTransportPlugin and
  3272. ServerTransportPlugin into a single function. Closes ticket 6456.
  3273. - Add inline functions and convenience macros for inspecting channel
  3274. state. Refactor the code to use convenience macros instead of
  3275. checking channel state directly. Fixes issue 7356.
  3276. - Document all members of was_router_added_t and rename
  3277. ROUTER_WAS_NOT_NEW to ROUTER_IS_ALREADY_KNOWN to make it less
  3278. confusable with ROUTER_WAS_TOO_OLD. Fixes issue 13644.
  3279. - In connection_exit_begin_conn(), use END_CIRC_REASON_TORPROTOCOL
  3280. constant instead of hardcoded value. Fixes issue 13840.
  3281. - Refactor our generic strmap and digestmap types into a single
  3282. implementation, so that we can add a new digest256map
  3283. type trivially.
  3284. o Documentation:
  3285. - Document the bridge-authority-only 'networkstatus-bridges' file.
  3286. Closes ticket 13713; patch from "tom".
  3287. - Fix typo in PredictedPortsRelevanceTime option description in
  3288. manpage. Resolves issue 13707.
  3289. - Stop suggesting that users specify relays by nickname: it isn't a
  3290. good idea. Also, properly cross-reference how to specify relays in
  3291. all parts of manual documenting options that take a list of
  3292. relays. Closes ticket 13381.
  3293. - Clarify the HiddenServiceDir option description in manpage to make
  3294. it clear that relative paths are taken with respect to the current
  3295. working directory. Also clarify that this behavior is not
  3296. guaranteed to remain indefinitely. Fixes issue 13913.
  3297. o Testing:
  3298. - New tests for many parts of channel, relay, and circuitmux
  3299. functionality. Code by Andrea; part of 9262.
  3300. - New tests for parse_transport_line(). Part of ticket 6456.
  3301. - In the unit tests, use chgrp() to change the group of the unit
  3302. test temporary directory to the current user, so that the sticky
  3303. bit doesn't interfere with tests that check directory groups.
  3304. Closes 13678.
  3305. - Add unit tests for resolve_my_addr(). Part of ticket 12376; patch
  3306. by 'rl1987'.
  3307. Changes in version 0.2.6.1-alpha - 2014-10-30
  3308. Tor 0.2.6.1-alpha is the first release in the Tor 0.2.6.x series. It
  3309. includes numerous code cleanups and new tests, and fixes a large
  3310. number of annoying bugs. Out-of-memory conditions are handled better
  3311. than in 0.2.5, pluggable transports have improved proxy support, and
  3312. clients now use optimistic data for contacting hidden services. Also,
  3313. we are now more robust to changes in what we consider a parseable
  3314. directory object, so that tightening restrictions does not have a risk
  3315. of introducing infinite download loops.
  3316. This is the first alpha release in a new series, so expect there to be
  3317. bugs. Users who would rather test out a more stable branch should stay
  3318. with 0.2.5.x for now.
  3319. o New compiler and system requirements:
  3320. - Tor 0.2.6.x requires that your compiler support more of the C99
  3321. language standard than before. The 'configure' script now detects
  3322. whether your compiler supports C99 mid-block declarations and
  3323. designated initializers. If it does not, Tor will not compile.
  3324. We may revisit this requirement if it turns out that a significant
  3325. number of people need to build Tor with compilers that don't
  3326. bother implementing a 15-year-old standard. Closes ticket 13233.
  3327. - Tor no longer supports systems without threading support. When we
  3328. began working on Tor, there were several systems that didn't have
  3329. threads, or where the thread support wasn't able to run the
  3330. threads of a single process on multiple CPUs. That no longer
  3331. holds: every system where Tor needs to run well now has threading
  3332. support. Resolves ticket 12439.
  3333. o Removed platform support:
  3334. - We no longer include special code to build on Windows CE; as far
  3335. as we know, nobody has used Tor on Windows CE in a very long time.
  3336. Closes ticket 11446.
  3337. o Major features (bridges):
  3338. - Expose the outgoing upstream HTTP/SOCKS proxy to pluggable
  3339. transports if they are configured via the "TOR_PT_PROXY"
  3340. environment variable. Implements proposal 232. Resolves
  3341. ticket 8402.
  3342. o Major features (client performance, hidden services):
  3343. - Allow clients to use optimistic data when connecting to a hidden
  3344. service, which should remove a round-trip from hidden service
  3345. initialization. See proposal 181 for details. Implements
  3346. ticket 13211.
  3347. o Major features (directory system):
  3348. - Upon receiving an unparseable directory object, if its digest
  3349. matches what we expected, then don't try to download it again.
  3350. Previously, when we got a descriptor we didn't like, we would keep
  3351. trying to download it over and over. Closes ticket 11243.
  3352. o Major features (sample torrc):
  3353. - Add a new, infrequently-changed "torrc.minimal". This file is
  3354. similar to torrc.sample, but it will change as infrequently as
  3355. possible, for the benefit of users whose systems prompt them for
  3356. intervention whenever a default configuration file is changed.
  3357. Making this change allows us to update torrc.sample to be a more
  3358. generally useful "sample torrc".
  3359. o Major bugfixes (directory authorities):
  3360. - Do not assign the HSDir flag to relays if they are not Valid, or
  3361. currently hibernating. Fixes 12573; bugfix on 0.2.0.10-alpha.
  3362. o Major bugfixes (directory bandwidth performance):
  3363. - Don't flush the zlib buffer aggressively when compressing
  3364. directory information for clients. This should save about 7% of
  3365. the bandwidth currently used for compressed descriptors and
  3366. microdescriptors. Fixes bug 11787; bugfix on 0.1.1.23.
  3367. o Minor features (security, memory wiping):
  3368. - Ensure we securely wipe keys from memory after
  3369. crypto_digest_get_digest and init_curve25519_keypair_from_file
  3370. have finished using them. Resolves ticket 13477.
  3371. o Minor features (security, out-of-memory handling):
  3372. - When handling an out-of-memory condition, allocate less memory for
  3373. temporary data structures. Fixes issue 10115.
  3374. - When handling an out-of-memory condition, consider more types of
  3375. buffers, including those on directory connections, and zlib
  3376. buffers. Resolves ticket 11792.
  3377. o Minor features:
  3378. - When identity keypair is generated for first time, log a
  3379. congratulatory message that links to the new relay lifecycle
  3380. document. Implements feature 10427.
  3381. o Minor features (client):
  3382. - Clients are now willing to send optimistic data (before they
  3383. receive a 'connected' cell) to relays of any version. (Relays
  3384. without support for optimistic data are no longer supported on the
  3385. Tor network.) Resolves ticket 13153.
  3386. o Minor features (directory authorities):
  3387. - Don't list relays with a bandwidth estimate of 0 in the consensus.
  3388. Implements a feature proposed during discussion of bug 13000.
  3389. - In tor-gencert, report an error if the user provides the same
  3390. argument more than once.
  3391. - If a directory authority can't find a best consensus method in the
  3392. votes that it holds, it now falls back to its favorite consensus
  3393. method. Previously, it fell back to method 1. Neither of these is
  3394. likely to get enough signatures, but "fall back to favorite"
  3395. doesn't require us to maintain support an obsolete consensus
  3396. method. Implements part of proposal 215.
  3397. o Minor features (logging):
  3398. - On Unix-like systems, you can now use named pipes as the target of
  3399. the Log option, and other options that try to append to files.
  3400. Closes ticket 12061. Patch from "carlo von lynX".
  3401. - When opening a log file at startup, send it every log message that
  3402. we generated between startup and opening it. Previously, log
  3403. messages that were generated before opening the log file were only
  3404. logged to stdout. Closes ticket 6938.
  3405. - Add a TruncateLogFile option to overwrite logs instead of
  3406. appending to them. Closes ticket 5583.
  3407. o Minor features (portability, Solaris):
  3408. - Threads are no longer disabled by default on Solaris; we believe
  3409. that the versions of Solaris with broken threading support are all
  3410. obsolete by now. Resolves ticket 9495.
  3411. o Minor features (relay):
  3412. - Re-check our address after we detect a changed IP address from
  3413. getsockname(). This ensures that the controller command "GETINFO
  3414. address" will report the correct value. Resolves ticket 11582.
  3415. Patch from "ra".
  3416. - A new AccountingRule option lets Relays set whether they'd like
  3417. AccountingMax to be applied separately to inbound and outbound
  3418. traffic, or applied to the sum of inbound and outbound traffic.
  3419. Resolves ticket 961. Patch by "chobe".
  3420. o Minor features (testing networks):
  3421. - Add the TestingDirAuthVoteExit option, which lists nodes to assign
  3422. the "Exit" flag regardless of their uptime, bandwidth, or exit
  3423. policy. TestingTorNetwork must be set for this option to have any
  3424. effect. Previously, authorities would take up to 35 minutes to
  3425. give nodes the Exit flag in a test network. Partially implements
  3426. ticket 13161.
  3427. o Minor features (validation):
  3428. - Check all date/time values passed to tor_timegm and
  3429. parse_rfc1123_time for validity, taking leap years into account.
  3430. Improves HTTP header validation. Implemented with bug 13476.
  3431. - In correct_tm(), limit the range of values returned by system
  3432. localtime(_r) and gmtime(_r) to be between the years 1 and 8099.
  3433. This means we don't have to deal with negative or too large dates,
  3434. even if a clock is wrong. Otherwise we might fail to read a file
  3435. written by us which includes such a date. Fixes bug 13476.
  3436. o Minor bugfixes (bridge clients):
  3437. - When configured to use a bridge without an identity digest (not
  3438. recommended), avoid launching an extra channel to it when
  3439. bootstrapping. Fixes bug 7733; bugfix on 0.2.4.4-alpha.
  3440. o Minor bugfixes (bridges):
  3441. - When DisableNetwork is set, do not launch pluggable transport
  3442. plugins, and if any are running, terminate them. Fixes bug 13213;
  3443. bugfix on 0.2.3.6-alpha.
  3444. o Minor bugfixes (C correctness):
  3445. - Fix several instances of possible integer overflow/underflow/NaN.
  3446. Fixes bug 13104; bugfix on 0.2.3.1-alpha and later. Patches
  3447. from "teor".
  3448. - In circuit_build_times_calculate_timeout() in circuitstats.c,
  3449. avoid dividing by zero in the pareto calculations. This traps
  3450. under clang's "undefined-trap" sanitizer. Fixes bug 13290; bugfix
  3451. on 0.2.2.2-alpha.
  3452. - Fix an integer overflow in format_time_interval(). Fixes bug
  3453. 13393; bugfix on 0.2.0.10-alpha.
  3454. - Set the correct day of year value when the system's localtime(_r)
  3455. or gmtime(_r) functions fail to set struct tm. Not externally
  3456. visible. Fixes bug 13476; bugfix on 0.0.2pre14.
  3457. - Avoid unlikely signed integer overflow in tor_timegm on systems
  3458. with 32-bit time_t. Fixes bug 13476; bugfix on 0.0.2pre14.
  3459. o Minor bugfixes (client):
  3460. - Fix smartlist_choose_node_by_bandwidth() so that relays with the
  3461. BadExit flag are not considered worthy candidates. Fixes bug
  3462. 13066; bugfix on 0.1.2.3-alpha.
  3463. - Use the consensus schedule for downloading consensuses, and not
  3464. the generic schedule. Fixes bug 11679; bugfix on 0.2.2.6-alpha.
  3465. - Handle unsupported or malformed SOCKS5 requests properly by
  3466. responding with the appropriate error message before closing the
  3467. connection. Fixes bugs 12971 and 13314; bugfix on 0.0.2pre13.
  3468. o Minor bugfixes (client, torrc):
  3469. - Stop modifying the value of our DirReqStatistics torrc option just
  3470. because we're not a bridge or relay. This bug was causing Tor
  3471. Browser users to write "DirReqStatistics 0" in their torrc files
  3472. as if they had chosen to change the config. Fixes bug 4244; bugfix
  3473. on 0.2.3.1-alpha.
  3474. - When GeoIPExcludeUnknown is enabled, do not incorrectly decide
  3475. that our options have changed every time we SIGHUP. Fixes bug
  3476. 9801; bugfix on 0.2.4.10-alpha. Patch from "qwerty1".
  3477. o Minor bugfixes (controller):
  3478. - Return an error when the second or later arguments of the
  3479. "setevents" controller command are invalid events. Previously we
  3480. would return success while silently skipping invalid events. Fixes
  3481. bug 13205; bugfix on 0.2.3.2-alpha. Reported by "fpxnns".
  3482. o Minor bugfixes (directory system):
  3483. - Always believe that v3 directory authorities serve extra-info
  3484. documents, whether they advertise "caches-extra-info" or not.
  3485. Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
  3486. - When running as a v3 directory authority, advertise that you serve
  3487. extra-info documents so that clients who want them can find them
  3488. from you too. Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
  3489. - Check the BRIDGE_DIRINFO flag bitwise rather than using equality.
  3490. Previously, directories offering BRIDGE_DIRINFO and some other
  3491. flag (i.e. microdescriptors or extrainfo) would be ignored when
  3492. looking for bridges. Partially fixes bug 13163; bugfix
  3493. on 0.2.0.7-alpha.
  3494. o Minor bugfixes (networking):
  3495. - Check for orconns and use connection_or_close_for_error() rather
  3496. than connection_mark_for_close() directly in the getsockopt()
  3497. failure case of connection_handle_write_impl(). Fixes bug 11302;
  3498. bugfix on 0.2.4.4-alpha.
  3499. o Minor bugfixes (relay):
  3500. - When generating our family list, remove spaces from around the
  3501. entries. Fixes bug 12728; bugfix on 0.2.1.7-alpha.
  3502. - If our previous bandwidth estimate was 0 bytes, allow publishing a
  3503. new relay descriptor immediately. Fixes bug 13000; bugfix
  3504. on 0.1.1.6-alpha.
  3505. o Minor bugfixes (testing networks):
  3506. - Fix TestingDirAuthVoteGuard to properly give out Guard flags in a
  3507. testing network. Fixes bug 13064; bugfix on 0.2.5.2-alpha.
  3508. - Stop using the default authorities in networks which provide both
  3509. AlternateDirAuthority and AlternateBridgeAuthority. Partially
  3510. fixes bug 13163; bugfix on 0.2.0.13-alpha.
  3511. o Minor bugfixes (testing):
  3512. - Stop spawn test failures due to a race condition between the
  3513. SIGCHLD handler updating the process status, and the test reading
  3514. it. Fixes bug 13291; bugfix on 0.2.3.3-alpha.
  3515. o Minor bugfixes (testing, Windows):
  3516. - Avoid passing an extra backslash when creating a temporary
  3517. directory for running the unit tests on Windows. Fixes bug 12392;
  3518. bugfix on 0.2.2.25-alpha. Patch from Gisle Vanem.
  3519. o Minor bugfixes (windows):
  3520. - Remove code to special-case handling of NTE_BAD_KEYSET when
  3521. acquiring windows CryptoAPI context. This error can't actually
  3522. occur for the parameters we're providing. Fixes bug 10816; bugfix
  3523. on 0.0.2pre26.
  3524. o Minor bugfixes (zlib):
  3525. - Avoid truncating a zlib stream when trying to finalize it with an
  3526. empty output buffer. Fixes bug 11824; bugfix on 0.1.1.23.
  3527. o Build fixes:
  3528. - Allow our configure script to build correctly with autoconf 2.62
  3529. again. Fixes bug 12693; bugfix on 0.2.5.2-alpha.
  3530. - Improve the error message from ./configure to make it clear that
  3531. when asciidoc has not been found, the user will have to either add
  3532. --disable-asciidoc argument or install asciidoc. Resolves
  3533. ticket 13228.
  3534. o Code simplification and refactoring:
  3535. - Change the entry_is_live() function to take named bitfield
  3536. elements instead of an unnamed list of booleans. Closes
  3537. ticket 12202.
  3538. - Refactor and unit-test entry_is_time_to_retry() in entrynodes.c.
  3539. Resolves ticket 12205.
  3540. - Use calloc and reallocarray functions instead of multiply-
  3541. then-malloc. This makes it less likely for us to fall victim to an
  3542. integer overflow attack when allocating. Resolves ticket 12855.
  3543. - Use the standard macro name SIZE_MAX, instead of our
  3544. own SIZE_T_MAX.
  3545. - Document usage of the NO_DIRINFO and ALL_DIRINFO flags clearly in
  3546. functions which take them as arguments. Replace 0 with NO_DIRINFO
  3547. in a function call for clarity. Seeks to prevent future issues
  3548. like 13163.
  3549. - Avoid 4 null pointer errors under clang static analysis by using
  3550. tor_assert() to prove that the pointers aren't null. Fixes
  3551. bug 13284.
  3552. - Rework the API of policies_parse_exit_policy() to use a bitmask to
  3553. represent parsing options, instead of a confusing mess of
  3554. booleans. Resolves ticket 8197.
  3555. - Introduce a helper function to parse ExitPolicy in
  3556. or_options_t structure.
  3557. o Documentation:
  3558. - Add a doc/TUNING document with tips for handling large numbers of
  3559. TCP connections when running busy Tor relay. Update the warning
  3560. message to point to this file when running out of sockets
  3561. operating system is allowing to use simultaneously. Resolves
  3562. ticket 9708.
  3563. o Removed features:
  3564. - We no longer remind the user about configuration options that have
  3565. been obsolete since 0.2.3.x or earlier. Patch by Adrien Bak.
  3566. - Remove our old, non-weighted bandwidth-based node selection code.
  3567. Previously, we used it as a fallback when we couldn't perform
  3568. weighted bandwidth-based node selection. But that would only
  3569. happen in the cases where we had no consensus, or when we had a
  3570. consensus generated by buggy or ancient directory authorities. In
  3571. either case, it's better to use the more modern, better maintained
  3572. algorithm, with reasonable defaults for the weights. Closes
  3573. ticket 13126.
  3574. - Remove the --disable-curve25519 configure option. Relays and
  3575. clients now are required to support curve25519 and the
  3576. ntor handshake.
  3577. - The old "StrictEntryNodes" and "StrictExitNodes" options, which
  3578. used to be deprecated synonyms for "StrictNodes", are now marked
  3579. obsolete. Resolves ticket 12226.
  3580. - Clients don't understand the BadDirectory flag in the consensus
  3581. anymore, and ignore it.
  3582. o Testing:
  3583. - Refactor the function that chooses guard nodes so that it can more
  3584. easily be tested; write some tests for it.
  3585. - Fix and re-enable the fgets_eagain unit test. Fixes bug 12503;
  3586. bugfix on 0.2.3.1-alpha. Patch from "cypherpunks."
  3587. - Create unit tests for format_time_interval(). With bug 13393.
  3588. - Add unit tests for tor_timegm signed overflow, tor_timegm and
  3589. parse_rfc1123_time validity checks, correct_tm year clamping. Unit
  3590. tests (visible) fixes in bug 13476.
  3591. - Add a "coverage-html" make target to generate HTML-visualized
  3592. coverage results when building with --enable-coverage. (Requires
  3593. lcov.) Patch from Kevin Murray.
  3594. - Enable the backtrace handler (where supported) when running the
  3595. unit tests.
  3596. - Revise all unit tests that used the legacy test_* macros to
  3597. instead use the recommended tt_* macros. This patch was generated
  3598. with coccinelle, to avoid manual errors. Closes ticket 13119.
  3599. o Distribution (systemd):
  3600. - systemd unit file: only allow tor to write to /var/lib/tor and
  3601. /var/log/tor. The rest of the filesystem is accessible for reading
  3602. only. Patch by intrigeri; resolves ticket 12751.
  3603. - systemd unit file: ensure that the process and all its children
  3604. can never gain new privileges. Patch by intrigeri; resolves
  3605. ticket 12939.
  3606. - systemd unit file: set up /var/run/tor as writable for the Tor
  3607. service. Patch by intrigeri; resolves ticket 13196.
  3608. o Removed features (directory authorities):
  3609. - Remove code that prevented authorities from listing Tor relays
  3610. affected by CVE-2011-2769 as guards. These relays are already
  3611. rejected altogether due to the minimum version requirement of
  3612. 0.2.3.16-alpha. Closes ticket 13152.
  3613. - The "AuthDirRejectUnlisted" option no longer has any effect, as
  3614. the fingerprints file (approved-routers) has been deprecated.
  3615. - Directory authorities do not support being Naming dirauths anymore.
  3616. The "NamingAuthoritativeDir" config option is now obsolete.
  3617. - Directory authorities do not support giving out the BadDirectory
  3618. flag anymore.
  3619. - Directory authorities no longer advertise or support consensus
  3620. methods 1 through 12 inclusive. These consensus methods were
  3621. obsolete and/or insecure: maintaining the ability to support them
  3622. served no good purpose. Implements part of proposal 215; closes
  3623. ticket 10163.
  3624. o Testing (test-network.sh):
  3625. - Stop using "echo -n", as some shells' built-in echo doesn't
  3626. support "-n". Instead, use "/bin/echo -n". Partially fixes
  3627. bug 13161.
  3628. - Stop an apparent test-network hang when used with make -j2. Fixes
  3629. bug 13331.
  3630. - Add a --delay option to test-network.sh, which configures the
  3631. delay before the chutney network tests for data transmission.
  3632. Partially implements ticket 13161.
  3633. Changes in version 0.2.5.10 - 2014-10-24
  3634. Tor 0.2.5.10 is the first stable release in the 0.2.5 series.
  3635. It adds several new security features, including improved
  3636. denial-of-service resistance for relays, new compiler hardening
  3637. options, and a system-call sandbox for hardened installations on Linux
  3638. (requires seccomp2). The controller protocol has several new features,
  3639. resolving IPv6 addresses should work better than before, and relays
  3640. should be a little more CPU-efficient. We've added support for more
  3641. OpenBSD and FreeBSD transparent proxy types. We've improved the build
  3642. system and testing infrastructure to allow unit testing of more parts
  3643. of the Tor codebase. Finally, we've addressed several nagging pluggable
  3644. transport usability issues, and included numerous other small bugfixes
  3645. and features mentioned below.
  3646. This release marks end-of-life for Tor 0.2.3.x; those Tor versions
  3647. have accumulated many known flaws; everyone should upgrade.
  3648. o Deprecated versions:
  3649. - Tor 0.2.3.x has reached end-of-life; it has received no patches or
  3650. attention for some while.
  3651. Changes in version 0.2.5.9-rc - 2014-10-20
  3652. Tor 0.2.5.9-rc is the third release candidate for the Tor 0.2.5.x
  3653. series. It disables SSL3 in response to the recent "POODLE" attack
  3654. (even though POODLE does not affect Tor). It also works around a crash
  3655. bug caused by some operating systems' response to the "POODLE" attack
  3656. (which does affect Tor). It also contains a few miscellaneous fixes.
  3657. o Major security fixes:
  3658. - Disable support for SSLv3. All versions of OpenSSL in use with Tor
  3659. today support TLS 1.0 or later, so we can safely turn off support
  3660. for this old (and insecure) protocol. Fixes bug 13426.
  3661. o Major bugfixes (openssl bug workaround):
  3662. - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
  3663. 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
  3664. 13471. This is a workaround for an OpenSSL bug.
  3665. o Minor bugfixes:
  3666. - Disable the sandbox name resolver cache when running tor-resolve:
  3667. tor-resolve doesn't use the sandbox code, and turning it on was
  3668. breaking attempts to do tor-resolve on a non-default server on
  3669. Linux. Fixes bug 13295; bugfix on 0.2.5.3-alpha.
  3670. o Compilation fixes:
  3671. - Build and run correctly on systems like OpenBSD-current that have
  3672. patched OpenSSL to remove get_cipher_by_char and/or its
  3673. implementations. Fixes issue 13325.
  3674. o Downgraded warnings:
  3675. - Downgrade the severity of the 'unexpected sendme cell from client'
  3676. from 'warn' to 'protocol warning'. Closes ticket 8093.
  3677. Changes in version 0.2.4.25 - 2014-10-20
  3678. Tor 0.2.4.25 disables SSL3 in response to the recent "POODLE" attack
  3679. (even though POODLE does not affect Tor). It also works around a crash
  3680. bug caused by some operating systems' response to the "POODLE" attack
  3681. (which does affect Tor).
  3682. o Major security fixes (also in 0.2.5.9-rc):
  3683. - Disable support for SSLv3. All versions of OpenSSL in use with Tor
  3684. today support TLS 1.0 or later, so we can safely turn off support
  3685. for this old (and insecure) protocol. Fixes bug 13426.
  3686. o Major bugfixes (openssl bug workaround, also in 0.2.5.9-rc):
  3687. - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
  3688. 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
  3689. 13471. This is a workaround for an OpenSSL bug.
  3690. Changes in version 0.2.5.8-rc - 2014-09-22
  3691. Tor 0.2.5.8-rc is the second release candidate for the Tor 0.2.5.x
  3692. series. It fixes a bug that affects consistency and speed when
  3693. connecting to hidden services, and it updates the location of one of
  3694. the directory authorities.
  3695. o Major bugfixes:
  3696. - Clients now send the correct address for their chosen rendezvous
  3697. point when trying to access a hidden service. They used to send
  3698. the wrong address, which would still work some of the time because
  3699. they also sent the identity digest of the rendezvous point, and if
  3700. the hidden service happened to try connecting to the rendezvous
  3701. point from a relay that already had a connection open to it,
  3702. the relay would reuse that connection. Now connections to hidden
  3703. services should be more robust and faster. Also, this bug meant
  3704. that clients were leaking to the hidden service whether they were
  3705. on a little-endian (common) or big-endian (rare) system, which for
  3706. some users might have reduced their anonymity. Fixes bug 13151;
  3707. bugfix on 0.2.1.5-alpha.
  3708. o Directory authority changes:
  3709. - Change IP address for gabelmoo (v3 directory authority).
  3710. Changes in version 0.2.4.24 - 2014-09-22
  3711. Tor 0.2.4.24 fixes a bug that affects consistency and speed when
  3712. connecting to hidden services, and it updates the location of one of
  3713. the directory authorities.
  3714. o Major bugfixes:
  3715. - Clients now send the correct address for their chosen rendezvous
  3716. point when trying to access a hidden service. They used to send
  3717. the wrong address, which would still work some of the time because
  3718. they also sent the identity digest of the rendezvous point, and if
  3719. the hidden service happened to try connecting to the rendezvous
  3720. point from a relay that already had a connection open to it,
  3721. the relay would reuse that connection. Now connections to hidden
  3722. services should be more robust and faster. Also, this bug meant
  3723. that clients were leaking to the hidden service whether they were
  3724. on a little-endian (common) or big-endian (rare) system, which for
  3725. some users might have reduced their anonymity. Fixes bug 13151;
  3726. bugfix on 0.2.1.5-alpha.
  3727. o Directory authority changes:
  3728. - Change IP address for gabelmoo (v3 directory authority).
  3729. o Minor features (geoip):
  3730. - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
  3731. Country database.
  3732. Changes in version 0.2.5.7-rc - 2014-09-11
  3733. Tor 0.2.5.7-rc fixes several regressions from earlier in the 0.2.5.x
  3734. release series, and some long-standing bugs related to ORPort reachability
  3735. testing and failure to send CREATE cells. It is the first release
  3736. candidate for the Tor 0.2.5.x series.
  3737. o Major bugfixes (client, startup):
  3738. - Start making circuits as soon as DisabledNetwork is turned off.
  3739. When Tor started with DisabledNetwork set, it would correctly
  3740. conclude that it shouldn't build circuits, but it would mistakenly
  3741. cache this conclusion, and continue believing it even when
  3742. DisableNetwork is set to 0. Fixes the bug introduced by the fix
  3743. for bug 11200; bugfix on 0.2.5.4-alpha.
  3744. - Resume expanding abbreviations for command-line options. The fix
  3745. for bug 4647 accidentally removed our hack from bug 586 that
  3746. rewrote HashedControlPassword to __HashedControlSessionPassword
  3747. when it appears on the commandline (which allowed the user to set
  3748. her own HashedControlPassword in the torrc file while the
  3749. controller generates a fresh session password for each run). Fixes
  3750. bug 12948; bugfix on 0.2.5.1-alpha.
  3751. - Warn about attempts to run hidden services and relays in the same
  3752. process: that's probably not a good idea. Closes ticket 12908.
  3753. o Major bugfixes (relay):
  3754. - Avoid queuing or sending destroy cells for circuit ID zero when we
  3755. fail to send a CREATE cell. Fixes bug 12848; bugfix on 0.0.8pre1.
  3756. Found and fixed by "cypherpunks".
  3757. - Fix ORPort reachability detection on relays running behind a
  3758. proxy, by correctly updating the "local" mark on the controlling
  3759. channel when changing the address of an or_connection_t after the
  3760. handshake. Fixes bug 12160; bugfix on 0.2.4.4-alpha.
  3761. o Minor features (bridge):
  3762. - Add an ExtORPortCookieAuthFileGroupReadable option to make the
  3763. cookie file for the ExtORPort g+r by default.
  3764. o Minor features (geoip):
  3765. - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
  3766. Country database.
  3767. o Minor bugfixes (logging):
  3768. - Reduce the log severity of the "Pluggable transport proxy does not
  3769. provide any needed transports and will not be launched." message,
  3770. since Tor Browser includes several ClientTransportPlugin lines in
  3771. its torrc-defaults file, leading every Tor Browser user who looks
  3772. at her logs to see these notices and wonder if they're dangerous.
  3773. Resolves bug 13124; bugfix on 0.2.5.3-alpha.
  3774. - Downgrade "Unexpected onionskin length after decryption" warning
  3775. to a protocol-warn, since there's nothing relay operators can do
  3776. about a client that sends them a malformed create cell. Resolves
  3777. bug 12996; bugfix on 0.0.6rc1.
  3778. - Log more specific warnings when we get an ESTABLISH_RENDEZVOUS
  3779. cell on a cannibalized or non-OR circuit. Resolves ticket 12997.
  3780. - When logging information about an EXTEND2 or EXTENDED2 cell, log
  3781. their names correctly. Fixes part of bug 12700; bugfix
  3782. on 0.2.4.8-alpha.
  3783. - When logging information about a relay cell whose command we don't
  3784. recognize, log its command as an integer. Fixes part of bug 12700;
  3785. bugfix on 0.2.1.10-alpha.
  3786. - Escape all strings from the directory connection before logging
  3787. them. Fixes bug 13071; bugfix on 0.1.1.15. Patch from "teor".
  3788. o Minor bugfixes (controller):
  3789. - Restore the functionality of CookieAuthFileGroupReadable. Fixes
  3790. bug 12864; bugfix on 0.2.5.1-alpha.
  3791. - Actually send TRANSPORT_LAUNCHED and HS_DESC events to
  3792. controllers. Fixes bug 13085; bugfix on 0.2.5.1-alpha. Patch
  3793. by "teor".
  3794. o Minor bugfixes (compilation):
  3795. - Fix compilation of test.h with MSVC. Patch from Gisle Vanem;
  3796. bugfix on 0.2.5.5-alpha.
  3797. - Make the nmake make files work again. Fixes bug 13081. Bugfix on
  3798. 0.2.5.1-alpha. Patch from "NewEraCracker".
  3799. - In routerlist_assert_ok(), don't take the address of a
  3800. routerinfo's cache_info member unless that routerinfo is non-NULL.
  3801. Fixes bug 13096; bugfix on 0.1.1.9-alpha. Patch by "teor".
  3802. - Fix a large number of false positive warnings from the clang
  3803. analyzer static analysis tool. This should make real warnings
  3804. easier for clang analyzer to find. Patch from "teor". Closes
  3805. ticket 13036.
  3806. o Distribution (systemd):
  3807. - Verify configuration file via ExecStartPre in the systemd unit
  3808. file. Patch from intrigeri; resolves ticket 12730.
  3809. - Explicitly disable RunAsDaemon in the systemd unit file. Our
  3810. current systemd unit uses "Type = simple", so systemd does not
  3811. expect tor to fork. If the user has "RunAsDaemon 1" in their
  3812. torrc, then things won't work as expected. This is e.g. the case
  3813. on Debian (and derivatives), since there we pass "--defaults-torrc
  3814. /usr/share/tor/tor-service-defaults-torrc" (that contains
  3815. "RunAsDaemon 1") by default. Patch by intrigeri; resolves
  3816. ticket 12731.
  3817. o Documentation:
  3818. - Adjust the URLs in the README to refer to the new locations of
  3819. several documents on the website. Fixes bug 12830. Patch from
  3820. Matt Pagan.
  3821. - Document 'reject6' and 'accept6' ExitPolicy entries. Resolves
  3822. ticket 12878.
  3823. Changes in version 0.2.5.6-alpha - 2014-07-28
  3824. Tor 0.2.5.6-alpha brings us a big step closer to slowing down the
  3825. risk from guard rotation, and fixes a variety of other issues to get
  3826. us closer to a release candidate.
  3827. o Major features (also in 0.2.4.23):
  3828. - Make the number of entry guards configurable via a new
  3829. NumEntryGuards consensus parameter, and the number of directory
  3830. guards configurable via a new NumDirectoryGuards consensus
  3831. parameter. Implements ticket 12688.
  3832. o Major bugfixes (also in 0.2.4.23):
  3833. - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
  3834. implementation that caused incorrect results on 32-bit
  3835. implementations when certain malformed inputs were used along with
  3836. a small class of private ntor keys. This bug does not currently
  3837. appear to allow an attacker to learn private keys or impersonate a
  3838. Tor server, but it could provide a means to distinguish 32-bit Tor
  3839. implementations from 64-bit Tor implementations. Fixes bug 12694;
  3840. bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
  3841. Adam Langley.
  3842. o Major bugfixes:
  3843. - Perform circuit cleanup operations even when circuit
  3844. construction operations are disabled (because the network is
  3845. disabled, or because there isn't enough directory information).
  3846. Previously, when we were not building predictive circuits, we
  3847. were not closing expired circuits either. Fixes bug 8387; bugfix on
  3848. 0.1.1.11-alpha. This bug became visible in 0.2.4.10-alpha when we
  3849. became more strict about when we have "enough directory information
  3850. to build circuits".
  3851. o Minor features:
  3852. - Authorities now assign the Guard flag to the fastest 25% of the
  3853. network (it used to be the fastest 50%). Also raise the consensus
  3854. weight that guarantees the Guard flag from 250 to 2000. For the
  3855. current network, this results in about 1100 guards, down from 2500.
  3856. This step paves the way for moving the number of entry guards
  3857. down to 1 (proposal 236) while still providing reasonable expected
  3858. performance for most users. Implements ticket 12690.
  3859. - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
  3860. Country database.
  3861. - Slightly enhance the diagnostic message for bug 12184.
  3862. o Minor bugfixes (also in 0.2.4.23):
  3863. - Warn and drop the circuit if we receive an inbound 'relay early'
  3864. cell. Those used to be normal to receive on hidden service circuits
  3865. due to bug 1038, but the buggy Tor versions are long gone from
  3866. the network so we can afford to resume watching for them. Resolves
  3867. the rest of bug 1038; bugfix on 0.2.1.19.
  3868. - Correct a confusing error message when trying to extend a circuit
  3869. via the control protocol but we don't know a descriptor or
  3870. microdescriptor for one of the specified relays. Fixes bug 12718;
  3871. bugfix on 0.2.3.1-alpha.
  3872. o Minor bugfixes:
  3873. - Fix compilation when building with bufferevents enabled. (This
  3874. configuration is still not expected to work, however.)
  3875. Fixes bugs 12438, 12474, 11578; bugfixes on 0.2.5.1-alpha and
  3876. 0.2.5.3-alpha. Patches from Anthony G. Basile and Sathyanarayanan
  3877. Gunasekaran.
  3878. - Compile correctly with builds and forks of OpenSSL (such as
  3879. LibreSSL) that disable compression. Fixes bug 12602; bugfix on
  3880. 0.2.1.1-alpha. Patch from "dhill".
  3881. Changes in version 0.2.4.23 - 2014-07-28
  3882. Tor 0.2.4.23 brings us a big step closer to slowing down the risk from
  3883. guard rotation, and also backports several important fixes from the
  3884. Tor 0.2.5 alpha release series.
  3885. o Major features:
  3886. - Clients now look at the "usecreatefast" consensus parameter to
  3887. decide whether to use CREATE_FAST or CREATE cells for the first hop
  3888. of their circuit. This approach can improve security on connections
  3889. where Tor's circuit handshake is stronger than the available TLS
  3890. connection security levels, but the tradeoff is more computational
  3891. load on guard relays. Implements proposal 221. Resolves ticket 9386.
  3892. - Make the number of entry guards configurable via a new
  3893. NumEntryGuards consensus parameter, and the number of directory
  3894. guards configurable via a new NumDirectoryGuards consensus
  3895. parameter. Implements ticket 12688.
  3896. o Major bugfixes:
  3897. - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
  3898. implementation that caused incorrect results on 32-bit
  3899. implementations when certain malformed inputs were used along with
  3900. a small class of private ntor keys. This bug does not currently
  3901. appear to allow an attacker to learn private keys or impersonate a
  3902. Tor server, but it could provide a means to distinguish 32-bit Tor
  3903. implementations from 64-bit Tor implementations. Fixes bug 12694;
  3904. bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
  3905. Adam Langley.
  3906. o Minor bugfixes:
  3907. - Warn and drop the circuit if we receive an inbound 'relay early'
  3908. cell. Those used to be normal to receive on hidden service circuits
  3909. due to bug 1038, but the buggy Tor versions are long gone from
  3910. the network so we can afford to resume watching for them. Resolves
  3911. the rest of bug 1038; bugfix on 0.2.1.19.
  3912. - Correct a confusing error message when trying to extend a circuit
  3913. via the control protocol but we don't know a descriptor or
  3914. microdescriptor for one of the specified relays. Fixes bug 12718;
  3915. bugfix on 0.2.3.1-alpha.
  3916. - Avoid an illegal read from stack when initializing the TLS
  3917. module using a version of OpenSSL without all of the ciphers
  3918. used by the v2 link handshake. Fixes bug 12227; bugfix on
  3919. 0.2.4.8-alpha. Found by "starlight".
  3920. o Minor features:
  3921. - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
  3922. Country database.
  3923. Changes in version 0.2.5.5-alpha - 2014-06-18
  3924. Tor 0.2.5.5-alpha fixes a wide variety of remaining issues in the Tor
  3925. 0.2.5.x release series, including a couple of DoS issues, some
  3926. performance regressions, a large number of bugs affecting the Linux
  3927. seccomp2 sandbox code, and various other bugfixes. It also adds
  3928. diagnostic bugfixes for a few tricky issues that we're trying to
  3929. track down.
  3930. o Major features (security, traffic analysis resistance):
  3931. - Several major improvements to the algorithm used to decide when to
  3932. close TLS connections. Previous versions of Tor closed connections
  3933. at a fixed interval after the last time a non-padding cell was
  3934. sent over the connection, regardless of the target of the
  3935. connection. Now, we randomize the intervals by adding up to 50% of
  3936. their base value, we measure the length of time since connection
  3937. last had at least one circuit, and we allow connections to known
  3938. ORs to remain open a little longer (15 minutes instead of 3
  3939. minutes minimum). These changes should improve Tor's resistance
  3940. against some kinds of traffic analysis, and lower some overhead
  3941. from needlessly closed connections. Fixes ticket 6799.
  3942. Incidentally fixes ticket 12023; bugfix on 0.2.5.1-alpha.
  3943. o Major bugfixes (security, OOM, new since 0.2.5.4-alpha, also in 0.2.4.22):
  3944. - Fix a memory leak that could occur if a microdescriptor parse
  3945. fails during the tokenizing step. This bug could enable a memory
  3946. exhaustion attack by directory servers. Fixes bug 11649; bugfix
  3947. on 0.2.2.6-alpha.
  3948. o Major bugfixes (security, directory authorities):
  3949. - Directory authorities now include a digest of each relay's
  3950. identity key as a part of its microdescriptor.
  3951. This is a workaround for bug 11743 (reported by "cypherpunks"),
  3952. where Tor clients do not support receiving multiple
  3953. microdescriptors with the same SHA256 digest in the same
  3954. consensus. When clients receive a consensus like this, they only
  3955. use one of the relays. Without this fix, a hostile relay could
  3956. selectively disable some client use of target relays by
  3957. constructing a router descriptor with a different identity and the
  3958. same microdescriptor parameters and getting the authorities to
  3959. list it in a microdescriptor consensus. This fix prevents an
  3960. attacker from causing a microdescriptor collision, because the
  3961. router's identity is not forgeable.
  3962. o Major bugfixes (relay):
  3963. - Use a direct dirport connection when uploading non-anonymous
  3964. descriptors to the directory authorities. Previously, relays would
  3965. incorrectly use tunnel connections under a fairly wide variety of
  3966. circumstances. Fixes bug 11469; bugfix on 0.2.4.3-alpha.
  3967. - When a circuit accidentally has the same circuit ID for its
  3968. forward and reverse direction, correctly detect the direction of
  3969. cells using that circuit. Previously, this bug made roughly one
  3970. circuit in a million non-functional. Fixes bug 12195; this is a
  3971. bugfix on every version of Tor.
  3972. o Major bugfixes (client, pluggable transports):
  3973. - When managing pluggable transports, use OS notification facilities
  3974. to learn if they have crashed, and don't attempt to kill any
  3975. process that has already exited. Fixes bug 8746; bugfix
  3976. on 0.2.3.6-alpha.
  3977. o Minor features (diagnostic):
  3978. - When logging a warning because of bug 7164, additionally check the
  3979. hash table for consistency (as proposed on ticket 11737). This may
  3980. help diagnose bug 7164.
  3981. - When we log a heartbeat, log how many one-hop circuits we have
  3982. that are at least 30 minutes old, and log status information about
  3983. a few of them. This is an attempt to track down bug 8387.
  3984. - When encountering an unexpected CR while writing text to a file on
  3985. Windows, log the name of the file. Should help diagnosing
  3986. bug 11233.
  3987. - Give more specific warnings when a client notices that an onion
  3988. handshake has failed. Fixes ticket 9635.
  3989. - Add significant new logging code to attempt to diagnose bug 12184,
  3990. where relays seem to run out of available circuit IDs.
  3991. - Improve the diagnostic log message for bug 8387 even further to
  3992. try to improve our odds of figuring out why one-hop directory
  3993. circuits sometimes do not get closed.
  3994. o Minor features (security, memory management):
  3995. - Memory allocation tricks (mempools and buffer freelists) are now
  3996. disabled by default. You can turn them back on with
  3997. --enable-mempools and --enable-buf-freelists respectively. We're
  3998. disabling these features because malloc performance is good enough
  3999. on most platforms, and a similar feature in OpenSSL exacerbated
  4000. exploitation of the Heartbleed attack. Resolves ticket 11476.
  4001. o Minor features (security):
  4002. - Apply the secure SipHash-2-4 function to the hash table mapping
  4003. circuit IDs and channels to circuits. We missed this one when we
  4004. were converting all the other hash functions to use SipHash back
  4005. in 0.2.5.3-alpha. Resolves ticket 11750.
  4006. o Minor features (build):
  4007. - The configure script has a --disable-seccomp option to turn off
  4008. support for libseccomp on systems that have it, in case it (or
  4009. Tor's use of it) is broken. Resolves ticket 11628.
  4010. o Minor features (other):
  4011. - Update geoip and geoip6 to the June 4 2014 Maxmind GeoLite2
  4012. Country database.
  4013. o Minor bugfixes (security, new since 0.2.5.4-alpha, also in 0.2.4.22):
  4014. - When running a hidden service, do not allow TunneledDirConns 0;
  4015. this will keep the hidden service from running, and also
  4016. make it publish its descriptors directly over HTTP. Fixes bug 10849;
  4017. bugfix on 0.2.1.1-alpha.
  4018. o Minor bugfixes (performance):
  4019. - Avoid a bug where every successful connection made us recompute
  4020. the flag telling us whether we have sufficient information to
  4021. build circuits. Previously, we would forget our cached value
  4022. whenever we successfully opened a channel (or marked a router as
  4023. running or not running for any other reason), regardless of
  4024. whether we had previously believed the router to be running. This
  4025. forced us to run an expensive update operation far too often.
  4026. Fixes bug 12170; bugfix on 0.1.2.1-alpha.
  4027. - Avoid using tor_memeq() for checking relay cell integrity. This
  4028. removes a possible performance bottleneck. Fixes part of bug
  4029. 12169; bugfix on 0.2.1.31.
  4030. o Minor bugfixes (compilation):
  4031. - Fix compilation of test_status.c when building with MVSC. Bugfix
  4032. on 0.2.5.4-alpha. Patch from Gisle Vanem.
  4033. - Resolve GCC complaints on OpenBSD about discarding constness in
  4034. TO_{ORIGIN,OR}_CIRCUIT functions. Fixes part of bug 11633; bugfix
  4035. on 0.1.1.23. Patch from Dana Koch.
  4036. - Resolve clang complaints on OpenBSD with -Wshorten-64-to-32 due to
  4037. treatment of long and time_t as comparable types. Fixes part of
  4038. bug 11633. Patch from Dana Koch.
  4039. - Make Tor compile correctly with --disable-buf-freelists. Fixes bug
  4040. 11623; bugfix on 0.2.5.3-alpha.
  4041. - When deciding whether to build the 64-bit curve25519
  4042. implementation, detect platforms where we can compile 128-bit
  4043. arithmetic but cannot link it. Fixes bug 11729; bugfix on
  4044. 0.2.4.8-alpha. Patch from "conradev".
  4045. - Fix compilation when DNS_CACHE_DEBUG is enabled. Fixes bug 11761;
  4046. bugfix on 0.2.3.13-alpha. Found by "cypherpunks".
  4047. - Fix compilation with dmalloc. Fixes bug 11605; bugfix
  4048. on 0.2.4.10-alpha.
  4049. o Minor bugfixes (Directory server):
  4050. - When sending a compressed set of descriptors or microdescriptors,
  4051. make sure to finalize the zlib stream. Previously, we would write
  4052. all the compressed data, but if the last descriptor we wanted to
  4053. send was missing or too old, we would not mark the stream as
  4054. finished. This caused problems for decompression tools. Fixes bug
  4055. 11648; bugfix on 0.1.1.23.
  4056. o Minor bugfixes (Linux seccomp sandbox):
  4057. - Make the seccomp sandbox code compile under ARM Linux. Fixes bug
  4058. 11622; bugfix on 0.2.5.1-alpha.
  4059. - Avoid crashing when re-opening listener ports with the seccomp
  4060. sandbox active. Fixes bug 12115; bugfix on 0.2.5.1-alpha.
  4061. - Avoid crashing with the seccomp sandbox enabled along with
  4062. ConstrainedSockets. Fixes bug 12139; bugfix on 0.2.5.1-alpha.
  4063. - When we receive a SIGHUP with the sandbox enabled, correctly
  4064. support rotating our log files. Fixes bug 12032; bugfix
  4065. on 0.2.5.1-alpha.
  4066. - Avoid crash when running with sandboxing enabled and
  4067. DirReqStatistics not disabled. Fixes bug 12035; bugfix
  4068. on 0.2.5.1-alpha.
  4069. - Fix a "BUG" warning when trying to write bridge-stats files with
  4070. the Linux syscall sandbox filter enabled. Fixes bug 12041; bugfix
  4071. on 0.2.5.1-alpha.
  4072. - Prevent the sandbox from crashing on startup when run with the
  4073. --enable-expensive-hardening configuration option. Fixes bug
  4074. 11477; bugfix on 0.2.5.4-alpha.
  4075. - When running with DirPortFrontPage and sandboxing both enabled,
  4076. reload the DirPortFrontPage correctly when restarting. Fixes bug
  4077. 12028; bugfix on 0.2.5.1-alpha.
  4078. - Don't try to enable the sandbox when using the Tor binary to check
  4079. its configuration, hash a passphrase, or so on. Doing so was
  4080. crashing on startup for some users. Fixes bug 11609; bugfix
  4081. on 0.2.5.1-alpha.
  4082. - Avoid warnings when running with sandboxing and node statistics
  4083. enabled at the same time. Fixes part of 12064; bugfix on
  4084. 0.2.5.1-alpha. Patch from Michael Wolf.
  4085. - Avoid warnings when running with sandboxing enabled at the same
  4086. time as cookie authentication, hidden services, or directory
  4087. authority voting. Fixes part of 12064; bugfix on 0.2.5.1-alpha.
  4088. - Do not allow options that require calls to exec to be enabled
  4089. alongside the seccomp2 sandbox: they will inevitably crash. Fixes
  4090. bug 12043; bugfix on 0.2.5.1-alpha.
  4091. - Handle failures in getpwnam()/getpwuid() when running with the
  4092. User option set and the Linux syscall sandbox enabled. Fixes bug
  4093. 11946; bugfix on 0.2.5.1-alpha.
  4094. - Refactor the getaddrinfo workaround that the seccomp sandbox uses
  4095. to avoid calling getaddrinfo() after installing the sandbox
  4096. filters. Previously, it preloaded a cache with the IPv4 address
  4097. for our hostname, and nothing else. Now, it loads the cache with
  4098. every address that it used to initialize the Tor process. Fixes
  4099. bug 11970; bugfix on 0.2.5.1-alpha.
  4100. o Minor bugfixes (pluggable transports):
  4101. - Enable the ExtORPortCookieAuthFile option, to allow changing the
  4102. default location of the authentication token for the extended OR
  4103. Port as used by sever-side pluggable transports. We had
  4104. implemented this option before, but the code to make it settable
  4105. had been omitted. Fixes bug 11635; bugfix on 0.2.5.1-alpha.
  4106. - Avoid another 60-second delay when starting Tor in a pluggable-
  4107. transport-using configuration when we already have cached
  4108. descriptors for our bridges. Fixes bug 11965; bugfix
  4109. on 0.2.3.6-alpha.
  4110. o Minor bugfixes (client):
  4111. - Avoid "Tried to open a socket with DisableNetwork set" warnings
  4112. when starting a client with bridges configured and DisableNetwork
  4113. set. (Tor launcher starts Tor with DisableNetwork set the first
  4114. time it runs.) Fixes bug 10405; bugfix on 0.2.3.9-alpha.
  4115. o Minor bugfixes (testing):
  4116. - The Python parts of the test scripts now work on Python 3 as well
  4117. as Python 2, so systems where '/usr/bin/python' is Python 3 will
  4118. no longer have the tests break. Fixes bug 11608; bugfix
  4119. on 0.2.5.2-alpha.
  4120. - When looking for versions of python that we could run the tests
  4121. with, check for "python2.7" and "python3.3"; previously we were
  4122. only looking for "python", "python2", and "python3". Patch from
  4123. Dana Koch. Fixes bug 11632; bugfix on 0.2.5.2-alpha.
  4124. - Fix all valgrind warnings produced by the unit tests. There were
  4125. over a thousand memory leak warnings previously, mostly produced
  4126. by forgetting to free things in the unit test code. Fixes bug
  4127. 11618, bugfixes on many versions of Tor.
  4128. o Minor bugfixes (tor-fw-helper):
  4129. - Give a correct log message when tor-fw-helper fails to launch.
  4130. (Previously, we would say something like "tor-fw-helper sent us a
  4131. string we could not parse".) Fixes bug 9781; bugfix
  4132. on 0.2.4.2-alpha.
  4133. o Minor bugfixes (relay, threading):
  4134. - Check return code on spawn_func() in cpuworker code, so that we
  4135. don't think we've spawned a nonworking cpuworker and write junk to
  4136. it forever. Fix related to bug 4345; bugfix on all released Tor
  4137. versions. Found by "skruffy".
  4138. - Use a pthread_attr to make sure that spawn_func() cannot return an
  4139. error while at the same time launching a thread. Fix related to
  4140. bug 4345; bugfix on all released Tor versions. Reported
  4141. by "cypherpunks".
  4142. o Minor bugfixes (relay, oom prevention):
  4143. - Correctly detect the total available system memory. We tried to do
  4144. this in 0.2.5.4-alpha, but the code was set up to always return an
  4145. error value, even on success. Fixes bug 11805; bugfix
  4146. on 0.2.5.4-alpha.
  4147. o Minor bugfixes (relay, other):
  4148. - We now drop CREATE cells for already-existent circuit IDs and for
  4149. zero-valued circuit IDs, regardless of other factors that might
  4150. otherwise have called for DESTROY cells. Fixes bug 12191; bugfix
  4151. on 0.0.8pre1.
  4152. - Avoid an illegal read from stack when initializing the TLS module
  4153. using a version of OpenSSL without all of the ciphers used by the
  4154. v2 link handshake. Fixes bug 12227; bugfix on 0.2.4.8-alpha. Found
  4155. by "starlight".
  4156. - When rejecting DATA cells for stream_id zero, still count them
  4157. against the circuit's deliver window so that we don't fail to send
  4158. a SENDME. Fixes bug 11246; bugfix on 0.2.4.10-alpha.
  4159. o Minor bugfixes (logging):
  4160. - Fix a misformatted log message about delayed directory fetches.
  4161. Fixes bug 11654; bugfix on 0.2.5.3-alpha.
  4162. - Squelch a spurious LD_BUG message "No origin circuit for
  4163. successful SOCKS stream" in certain hidden service failure cases;
  4164. fixes bug 10616.
  4165. o Distribution:
  4166. - Include a tor.service file in contrib/dist for use with systemd.
  4167. Some distributions will be able to use this file unmodified;
  4168. others will need to tweak it, or write their own. Patch from Jamie
  4169. Nguyen; resolves ticket 8368.
  4170. o Documentation:
  4171. - Clean up several option names in the manpage to match their real
  4172. names, add the missing documentation for a couple of testing and
  4173. directory authority options, remove the documentation for a
  4174. V2-directory fetching option that no longer exists. Resolves
  4175. ticket 11634.
  4176. - Correct the documenation so that it lists the correct directory
  4177. for the stats files. (They are in a subdirectory called "stats",
  4178. not "status".)
  4179. - In the manpage, move more authority-only options into the
  4180. directory authority section so that operators of regular directory
  4181. caches don't get confused.
  4182. o Package cleanup:
  4183. - The contrib directory has been sorted and tidied. Before, it was
  4184. an unsorted dumping ground for useful and not-so-useful things.
  4185. Now, it is divided based on functionality, and the items which
  4186. seemed to be nonfunctional or useless have been removed. Resolves
  4187. ticket 8966; based on patches from "rl1987".
  4188. o Removed code:
  4189. - Remove /tor/dbg-stability.txt URL that was meant to help debug WFU
  4190. and MTBF calculations, but that nobody was using. Fixes ticket 11742.
  4191. - The TunnelDirConns and PreferTunnelledDirConns options no longer
  4192. exist; tunneled directory connections have been available since
  4193. 0.1.2.5-alpha, and turning them off is not a good idea. This is a
  4194. brute-force fix for 10849, where "TunnelDirConns 0" would break
  4195. hidden services.
  4196. Changes in version 0.2.4.22 - 2014-05-16
  4197. Tor 0.2.4.22 backports numerous high-priority fixes from the Tor 0.2.5
  4198. alpha release series. These include blocking all authority signing
  4199. keys that may have been affected by the OpenSSL "heartbleed" bug,
  4200. choosing a far more secure set of TLS ciphersuites by default, closing
  4201. a couple of memory leaks that could be used to run a target relay out
  4202. of RAM, and several others.
  4203. o Major features (secu