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- This document summarizes new features and bugfixes in each stable
- release of Tor. If you want to see more detailed descriptions of the
- changes in each development snapshot, see the ChangeLog file.
- Changes in version 0.3.4.9 - 2018-11-02
- Tor 0.3.4.9 is the second stable release in its series; it backports
- numerous fixes, including a fix for a bandwidth management bug that
- was causing memory exhaustion on relays. Anyone running an earlier
- version of Tor 0.3.4.9 should upgrade.
- o Major bugfixes (compilation, backport from 0.3.5.3-alpha):
- - Fix compilation on ARM (and other less-used CPUs) when compiling
- with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
- o Major bugfixes (mainloop, bootstrap, backport from 0.3.5.3-alpha):
- - Make sure Tor bootstraps and works properly if only the
- ControlPort is set. Prior to this fix, Tor would only bootstrap
- when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
- port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
- o Major bugfixes (relay, backport from 0.3.5.3-alpha):
- - When our write bandwidth limit is exhausted, stop writing on the
- connection. Previously, we had a typo in the code that would make
- us stop reading instead, leading to relay connections being stuck
- indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
- on 0.3.4.1-alpha.
- o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
- - Fix a use-after-free error that could be caused by passing Tor an
- impossible set of options that would fail during options_act().
- Fixes bug 27708; bugfix on 0.3.3.1-alpha.
- o Minor features (continuous integration, backport from 0.3.5.1-alpha):
- - Don't do a distcheck with --disable-module-dirauth in Travis.
- Implements ticket 27252.
- - Only run one online rust build in Travis, to reduce network
- errors. Skip offline rust builds on Travis for Linux gcc, because
- they're redundant. Implements ticket 27252.
- - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
- duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
- Linux with default settings, because all the non-default builds
- use gcc on Linux. Implements ticket 27252.
- o Minor features (continuous integration, backport from 0.3.5.3-alpha):
- - Use the Travis Homebrew addon to install packages on macOS during
- Travis CI. The package list is the same, but the Homebrew addon
- does not do a `brew update` by default. Implements ticket 27738.
- o Minor features (geoip):
- - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
- Country database. Closes ticket 27991.
- o Minor bugfixes (32-bit OSX and iOS, timing, backport from 0.3.5.2-alpha):
- - Fix an integer overflow bug in our optimized 32-bit millisecond-
- difference algorithm for 32-bit Apple platforms. Previously, it
- would overflow when calculating the difference between two times
- more than 47 days apart. Fixes part of bug 27139; bugfix
- on 0.3.4.1-alpha.
- - Improve the precision of our 32-bit millisecond difference
- algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
- bugfix on 0.3.4.1-alpha.
- - Relax the tolerance on the mainloop/update_time_jumps test when
- running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
- on 0.3.4.1-alpha.
- o Minor bugfixes (C correctness, to appear in 0.3.5.4-alpha):
- - Avoid undefined behavior in an end-of-string check when parsing
- the BEGIN line in a directory object. Fixes bug 28202; bugfix
- on 0.2.0.3-alpha.
- o Minor bugfixes (CI, appveyor, to appear in 0.3.5.4-alpha):
- - Only install the necessary mingw packages during our appveyor
- builds. This change makes the build a little faster, and prevents
- a conflict with a preinstalled mingw openssl that appveyor now
- ships. Fixes bugs 27943 and 27765; bugfix on 0.3.4.2-alpha.
- o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
- - Rewrite our assertion macros so that they no longer suppress the
- compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
- o Minor bugfixes (continuous integration, backport from 0.3.5.1-alpha):
- - Stop reinstalling identical packages in our Windows CI. Fixes bug
- 27464; bugfix on 0.3.4.1-alpha.
- o Minor bugfixes (directory authority, to appear in 0.3.5.4-alpha):
- - Log additional info when we get a relay that shares an ed25519 ID
- with a different relay, instead making a BUG() warning. Fixes bug
- 27800; bugfix on 0.3.2.1-alpha.
- o Minor bugfixes (directory connection shutdown, backport from 0.3.5.1-alpha):
- - Avoid a double-close when shutting down a stalled directory
- connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
- o Minor bugfixes (HTTP tunnel, backport from 0.3.5.1-alpha):
- - Fix a bug warning when closing an HTTP tunnel connection due to an
- HTTP request we couldn't handle. Fixes bug 26470; bugfix
- on 0.3.2.1-alpha.
- o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
- - Ensure circuitmux queues are empty before scheduling or sending
- padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
- o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
- - When the onion service directory can't be created or has the wrong
- permissions, do not log a stack trace. Fixes bug 27335; bugfix
- on 0.3.2.1-alpha.
- o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
- - Close all SOCKS request (for the same .onion) if the newly fetched
- descriptor is unusable. Before that, we would close only the first
- one leaving the other hanging and let to time out by themselves.
- Fixes bug 27410; bugfix on 0.3.2.1-alpha.
- o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
- - When selecting a v3 rendezvous point, don't only look at the
- protover, but also check whether the curve25519 onion key is
- present. This way we avoid picking a relay that supports the v3
- rendezvous but for which we don't have the microdescriptor. Fixes
- bug 27797; bugfix on 0.3.2.1-alpha.
- o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
- - Reject protocol names containing bytes other than alphanumeric
- characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
- on 0.2.9.4-alpha.
- o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
- - Compute protover votes correctly in the rust version of the
- protover code. Previously, the protover rewrite in 24031 allowed
- repeated votes from the same voter for the same protocol version
- to be counted multiple times in protover_compute_vote(). Fixes bug
- 27649; bugfix on 0.3.3.5-rc.
- - Reject protover names that contain invalid characters. Fixes bug
- 27687; bugfix on 0.3.3.1-alpha.
- o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
- - protover_all_supported() would attempt to allocate up to 16GB on
- some inputs, leading to a potential memory DoS. Fixes bug 27206;
- bugfix on 0.3.3.5-rc.
- o Minor bugfixes (rust, directory authority, to appear in 0.3.5.4-alpha):
- - Fix an API mismatch in the rust implementation of
- protover_compute_vote(). This bug could have caused crashes on any
- directory authorities running Tor with Rust (which we do not yet
- recommend). Fixes bug 27741; bugfix on 0.3.3.6.
- o Minor bugfixes (rust, to appear in 0.3.5.4-alpha):
- - Fix a potential null dereference in protover_all_supported(). Add
- a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
- - Return a string that can be safely freed by C code, not one
- created by the rust allocator, in protover_all_supported(). Fixes
- bug 27740; bugfix on 0.3.3.1-alpha.
- o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
- - If a unit test running in a subprocess exits abnormally or with a
- nonzero status code, treat the test as having failed, even if the
- test reported success. Without this fix, memory leaks don't cause
- the tests to fail, even with LeakSanitizer. Fixes bug 27658;
- bugfix on 0.2.2.4-alpha.
- o Minor bugfixes (testing, backport from 0.3.5.3-alpha):
- - Make the hs_service tests use the same time source when creating
- the introduction point and when testing it. Now tests work better
- on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
- on 0.3.2.1-alpha.
- o Minor bugfixes (testing, to appear in 0.3.5.4-alpha):
- - Treat backtrace test failures as expected on BSD-derived systems
- (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
- (FreeBSD failures have been treated as expected since 18204 in
- 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
- Changes in version 0.2.9.17 - 2018-09-10
- Tor 0.2.9.17 backports numerous bugfixes from later versions of Tor.
- o Minor features (compatibility, backport from 0.3.4.8):
- - Tell OpenSSL to maintain backward compatibility with previous
- RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
- ciphers are disabled by default. Closes ticket 27344.
- o Minor features (continuous integration, backport from 0.3.4.7-rc):
- - Enable macOS builds in our Travis CI configuration. Closes
- ticket 24629.
- - Install libcap-dev and libseccomp2-dev so these optional
- dependencies get tested on Travis CI. Closes ticket 26560.
- - Run asciidoc during Travis CI. Implements ticket 27087.
- - Use ccache in our Travis CI configuration. Closes ticket 26952.
- o Minor features (geoip):
- - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
- Country database. Closes ticket 27089.
- o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
- - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
- tell the compiler not to include the system malloc implementation.
- Fixes bug 20424; bugfix on 0.2.0.20-rc.
- o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
- - Silence a spurious compiler warning on the GetAdaptersAddresses
- function pointer cast. This issue is already fixed by 26481 in
- 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
- bugfix on 0.2.3.11-alpha.
- - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
- supported, and always fails. Some compilers warn about the
- function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
- on 0.2.2.23-alpha.
- o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
- - Don't link or search for pthreads when building for Windows, even
- if we are using build environment (like mingw) that provides a
- pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
- o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
- - Skip a pair of unreliable key generation tests on Windows, until
- the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
- bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
- o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
- - Pass the module flags to distcheck configure, and log the flags
- before running configure. (Backported to 0.2.9 and later as a
- precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
- o Minor bugfixes (continuous integration, backport from 0.3.4.8):
- - When a Travis build fails, and showing a log fails, keep trying to
- show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
- - When we use echo in Travis, don't pass a --flag as the first
- argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
- o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
- - When voting for recommended versions, make sure that all of the
- versions are well-formed and parsable. Fixes bug 26485; bugfix
- on 0.1.1.6-alpha.
- o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
- - Fix a bug in out sandboxing rules for the openat() syscall.
- Previously, no openat() call would be permitted, which would break
- filesystem operations on recent glibc versions. Fixes bug 25440;
- bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
- o Minor bugfixes (onion services, backport from 0.3.4.8):
- - Silence a spurious compiler warning in
- rend_client_send_introduction(). Fixes bug 27463; bugfix
- on 0.1.1.2-alpha.
- o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
- - Log a protocol warning when single onion services or Tor2web clients
- fail to authenticate direct connections to relays.
- Fixes bug 26924; bugfix on 0.2.9.1-alpha.
- o Minor bugfixes (testing, backport from 0.3.4.6-rc):
- - Disable core dumps in test_bt.sh, to avoid failures in "make
- distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
- o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
- - Before running make test-network-all, delete old logs and test
- result files, to avoid spurious failures. Fixes bug 27295; bugfix
- on 0.2.7.3-rc.
- o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
- - Our "tortls/cert_matches_key" unit test no longer relies on
- OpenSSL internals. Previously, it relied on unsupported OpenSSL
- behavior in a way that caused it to crash with OpenSSL 1.0.2p.
- Fixes bug 27226; bugfix on 0.2.5.1-alpha.
- o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
- - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
- 27185; bugfix on 0.2.2.2-alpha.
- Changes in version 0.3.2.12 - 2018-09-10
- Tor 0.3.2.12 backport numerous fixes from later versions of Tor.
- o Minor features (compatibility, backport from 0.3.4.8):
- - Tell OpenSSL to maintain backward compatibility with previous
- RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
- ciphers are disabled by default. Closes ticket 27344.
- o Minor features (continuous integration, backport from 0.3.4.7-rc):
- - Enable macOS builds in our Travis CI configuration. Closes
- ticket 24629.
- - Install libcap-dev and libseccomp2-dev so these optional
- dependencies get tested on Travis CI. Closes ticket 26560.
- - Run asciidoc during Travis CI. Implements ticket 27087.
- - Use ccache in our Travis CI configuration. Closes ticket 26952.
- o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
- - Use cargo cache in our Travis CI configuration. Closes
- ticket 26952.
- o Minor features (controller, backport from 0.3.4.6-rc):
- - The control port now exposes the list of HTTPTunnelPorts and
- ExtOrPorts via GETINFO net/listeners/httptunnel and
- net/listeners/extor respectively. Closes ticket 26647.
- o Minor features (directory authorities, backport from 0.3.4.7-rc):
- - Authorities no longer vote to make the subprotocol version
- "LinkAuth=1" a requirement: it is unsupportable with NSS, and
- hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
- o Minor features (geoip):
- - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
- Country database. Closes ticket 27089.
- o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
- - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
- tell the compiler not to include the system malloc implementation.
- Fixes bug 20424; bugfix on 0.2.0.20-rc.
- - Don't try to use a pragma to temporarily disable the
- -Wunused-const-variable warning if the compiler doesn't support
- it. Fixes bug 26785; bugfix on 0.3.2.11.
- o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
- - Silence a spurious compiler warning on the GetAdaptersAddresses
- function pointer cast. This issue is already fixed by 26481 in
- 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
- bugfix on 0.2.3.11-alpha.
- - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
- supported, and always fails. Some compilers warn about the
- function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
- on 0.2.2.23-alpha.
- o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
- - Don't link or search for pthreads when building for Windows, even
- if we are using build environment (like mingw) that provides a
- pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
- o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
- - Skip a pair of unreliable key generation tests on Windows, until
- the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
- bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
- o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
- - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
- - Pass the module flags to distcheck configure, and log the flags
- before running configure. (Backported to 0.2.9 and later as a
- precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
- o Minor bugfixes (continuous integration, backport from 0.3.4.8):
- - When a Travis build fails, and showing a log fails, keep trying to
- show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
- - When we use echo in Travis, don't pass a --flag as the first
- argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
- o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
- - When voting for recommended versions, make sure that all of the
- versions are well-formed and parsable. Fixes bug 26485; bugfix
- on 0.1.1.6-alpha.
- o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
- - Fix a bug in out sandboxing rules for the openat() syscall.
- Previously, no openat() call would be permitted, which would break
- filesystem operations on recent glibc versions. Fixes bug 25440;
- bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
- o Minor bugfixes (logging, backport from 0.3.4.6-rc):
- - Improve the log message when connection initiators fail to
- authenticate direct connections to relays. Fixes bug 26927; bugfix
- on 0.3.0.1-alpha.
- o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
- - Fix bug that causes services to not ever rotate their descriptors
- if they were getting SIGHUPed often. Fixes bug 26932; bugfix
- on 0.3.2.1-alpha.
- o Minor bugfixes (onion services, backport from 0.3.4.8):
- - Silence a spurious compiler warning in
- rend_client_send_introduction(). Fixes bug 27463; bugfix
- on 0.1.1.2-alpha.
- o Minor bugfixes (rust, backport from 0.3.4.7-rc):
- - Backport test_rust.sh from master. Fixes bug 26497; bugfix
- on 0.3.1.5-alpha.
- - Consistently use ../../.. as a fallback for $abs_top_srcdir in
- test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
- - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
- $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
- o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
- - Log a protocol warning when single onion services or Tor2web clients
- fail to authenticate direct connections to relays.
- Fixes bug 26924; bugfix on 0.2.9.1-alpha.
- o Minor bugfixes (testing, backport from 0.3.4.6-rc):
- - Disable core dumps in test_bt.sh, to avoid failures in "make
- distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
- o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
- - When running make test-network-all, use the mixed+hs-v2 network.
- (A previous fix to chutney removed v3 onion services from the
- mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
- confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
- - Before running make test-network-all, delete old logs and test
- result files, to avoid spurious failures. Fixes bug 27295; bugfix
- on 0.2.7.3-rc.
- o Minor bugfixes (testing, openssl compatibility):
- - Our "tortls/cert_matches_key" unit test no longer relies on OpenSSL
- internals. Previously, it relied on unsupported OpenSSL behavior in
- a way that caused it to crash with OpenSSL 1.0.2p. Fixes bug 27226;
- bugfix on 0.2.5.1-alpha.
- o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
- - Our "tortls/cert_matches_key" unit test no longer relies on
- OpenSSL internals. Previously, it relied on unsupported OpenSSL
- behavior in a way that caused it to crash with OpenSSL 1.0.2p.
- Fixes bug 27226; bugfix on 0.2.5.1-alpha.
- o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
- - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
- 27185; bugfix on 0.2.2.2-alpha.
- Changes in version 0.3.3.10 - 2018-09-10
- Tor 0.3.3.10 backports numerous fixes from later versions of Tor.
- o Minor features (bug workaround, backport from 0.3.4.7-rc):
- - Compile correctly on systems that provide the C11 stdatomic.h
- header, but where C11 atomic functions don't actually compile.
- Closes ticket 26779; workaround for Debian issue 903709.
- o Minor features (compatibility, backport from 0.3.4.8):
- - Tell OpenSSL to maintain backward compatibility with previous
- RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
- ciphers are disabled by default. Closes ticket 27344.
- o Minor features (continuous integration, backport from 0.3.4.7-rc):
- - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
- - Enable macOS builds in our Travis CI configuration. Closes
- ticket 24629.
- - Install libcap-dev and libseccomp2-dev so these optional
- dependencies get tested on Travis CI. Closes ticket 26560.
- - Run asciidoc during Travis CI. Implements ticket 27087.
- - Use ccache in our Travis CI configuration. Closes ticket 26952.
- o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
- - Use cargo cache in our Travis CI configuration. Closes
- ticket 26952.
- o Minor features (controller, backport from 0.3.4.6-rc):
- - The control port now exposes the list of HTTPTunnelPorts and
- ExtOrPorts via GETINFO net/listeners/httptunnel and
- net/listeners/extor respectively. Closes ticket 26647.
- o Minor features (directory authorities, backport from 0.3.4.7-rc):
- - Authorities no longer vote to make the subprotocol version
- "LinkAuth=1" a requirement: it is unsupportable with NSS, and
- hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
- o Minor features (geoip):
- - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
- Country database. Closes ticket 27089.
- o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
- - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
- tell the compiler not to include the system malloc implementation.
- Fixes bug 20424; bugfix on 0.2.0.20-rc.
- - Don't try to use a pragma to temporarily disable the
- -Wunused-const-variable warning if the compiler doesn't support
- it. Fixes bug 26785; bugfix on 0.3.2.11.
- o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
- - Silence a spurious compiler warning on the GetAdaptersAddresses
- function pointer cast. This issue is already fixed by 26481 in
- 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
- bugfix on 0.2.3.11-alpha.
- - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
- supported, and always fails. Some compilers warn about the
- function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
- on 0.2.2.23-alpha.
- o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
- - Don't link or search for pthreads when building for Windows, even
- if we are using build environment (like mingw) that provides a
- pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
- o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
- - Skip a pair of unreliable key generation tests on Windows, until
- the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
- bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
- o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
- - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
- - Pass the module flags to distcheck configure, and log the flags
- before running configure. (Backported to 0.2.9 and later as a
- precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
- o Minor bugfixes (continuous integration, backport from 0.3.4.8):
- - When a Travis build fails, and showing a log fails, keep trying to
- show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
- - When we use echo in Travis, don't pass a --flag as the first
- argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
- o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
- - When voting for recommended versions, make sure that all of the
- versions are well-formed and parsable. Fixes bug 26485; bugfix
- on 0.1.1.6-alpha.
- o Minor bugfixes (in-process restart, backport from 0.3.4.7-rc):
- - Always call tor_free_all() when leaving tor_run_main(). When we
- did not, restarting tor in-process would cause an assertion
- failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
- o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
- - Fix a bug in our sandboxing rules for the openat() syscall.
- Previously, no openat() call would be permitted, which would break
- filesystem operations on recent glibc versions. Fixes bug 25440;
- bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
- o Minor bugfixes (logging, backport from 0.3.4.6-rc):
- - Improve the log message when connection initiators fail to
- authenticate direct connections to relays. Fixes bug 26927; bugfix
- on 0.3.0.1-alpha.
- o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
- - Fix bug that causes services to not ever rotate their descriptors
- if they were getting SIGHUPed often. Fixes bug 26932; bugfix
- on 0.3.2.1-alpha.
- o Minor bugfixes (onion services, backport from 0.3.4.8):
- - Silence a spurious compiler warning in
- rend_client_send_introduction(). Fixes bug 27463; bugfix
- on 0.1.1.2-alpha.
- o Minor bugfixes (portability, backport from 0.3.4.6-rc):
- - Work around two different bugs in the OS X 10.10 and later SDKs
- that would prevent us from successfully targeting earlier versions
- of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
- o Minor bugfixes (portability, backport from 0.3.4.7-rc):
- - Fix compilation of the unit tests on GNU/Hurd, which does not
- define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
- from "paulusASol".
- o Minor bugfixes (rust, backport from 0.3.4.7-rc):
- - Backport test_rust.sh from master. Fixes bug 26497; bugfix
- on 0.3.1.5-alpha.
- - Consistently use ../../.. as a fallback for $abs_top_srcdir in
- test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
- - Protover parsing was accepting the presence of whitespace in
- version strings, which the C implementation would choke on, e.g.
- "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
- - Protover parsing was ignoring a 2nd hyphen and everything after
- it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
- on 0.3.3.1-alpha.
- - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
- $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
- - cd to ${abs_top_builddir}/src/rust before running cargo in
- src/test/test_rust.sh. This makes the working directory consistent
- between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
- o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
- - Log a protocol warning when single onion services or Tor2web clients
- fail to authenticate direct connections to relays.
- Fixes bug 26924; bugfix on 0.2.9.1-alpha.
- o Minor bugfixes (testing, backport from 0.3.4.6-rc):
- - Disable core dumps in test_bt.sh, to avoid failures in "make
- distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
- o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
- - When running make test-network-all, use the mixed+hs-v2 network.
- (A previous fix to chutney removed v3 onion services from the
- mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
- confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
- - Before running make test-network-all, delete old logs and test
- result files, to avoid spurious failures. Fixes bug 27295; bugfix
- on 0.2.7.3-rc.
- o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
- - Our "tortls/cert_matches_key" unit test no longer relies on
- OpenSSL internals. Previously, it relied on unsupported OpenSSL
- behavior in a way that caused it to crash with OpenSSL 1.0.2p.
- Fixes bug 27226; bugfix on 0.2.5.1-alpha.
- o Minor bugfixes (v3 onion services, backport from 0.3.4.6-rc):
- - Stop sending ed25519 link specifiers in v3 onion service introduce
- cells and descriptors, when the rendezvous or introduction point
- doesn't support ed25519 link authentication. Fixes bug 26627;
- bugfix on 0.3.2.4-alpha.
- o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
- - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
- 27185; bugfix on 0.2.2.2-alpha.
- Changes in version 0.3.4.8 - 2018-09-10
- Tor 0.3.4.8 is the first stable release in its series; it includes
- compilation and portability fixes.
- The Tor 0.3.4 series includes improvements for running Tor in
- low-power and embedded environments, which should help performance in
- general. We've begun work on better modularity, and included preliminary
- changes on the directory authority side to accommodate a new bandwidth
- measurement system. We've also integrated more continuous-integration
- systems into our development process, and made corresponding changes to
- Tor's testing infrastructure. Finally, we've continued to refine
- our anti-denial-of-service code.
- Below are the changes since 0.3.3.9. For a list of only the changes
- since 0.3.4.7-rc, see the ChangeLog file.
- o New system requirements:
- - Tor no longer tries to support old operating systems without
- mmap() or some local equivalent. Apparently, compilation on such
- systems has been broken for some time, without anybody noticing or
- complaining. Closes ticket 25398.
- o Major features (directory authority, modularization):
- - The directory authority subsystem has been modularized. The code
- is now located in src/or/dirauth/, and is compiled in by default.
- To disable the module, the configure option
- --disable-module-dirauth has been added. This module may be
- disabled by default in some future release. Closes ticket 25610.
- o Major features (main loop, CPU usage):
- - When Tor is disabled (via DisableNetwork or via hibernation), it
- no longer needs to run any per-second events. This change should
- make it easier for mobile applications to disable Tor while the
- device is sleeping, or Tor is not running. Closes ticket 26063.
- - Tor no longer enables all of its periodic events by default.
- Previously, Tor would enable all possible main loop events,
- regardless of whether it needed them. Furthermore, many of these
- events are now disabled when Tor is hibernating or DisableNetwork
- is set. This is a big step towards reducing client CPU usage by
- reducing the amount of wake-ups the daemon does. Closes tickets
- 25376 and 25762.
- - The bandwidth-limitation logic has been refactored so that
- bandwidth calculations are performed on-demand, rather than every
- TokenBucketRefillInterval milliseconds. This change should improve
- the granularity of our bandwidth calculations, and limit the
- number of times that the Tor process needs to wake up when it is
- idle. Closes ticket 25373.
- - Move responsibility for many operations from a once-per-second
- callback to a callback that is only scheduled as needed. Moving
- this functionality has allowed us to disable the callback when
- Tor's network is disabled. Once enough items are removed from our
- once-per-second callback, we can eliminate it entirely to conserve
- CPU when idle. The functionality removed includes: closing
- connections, circuits, and channels (ticket 25932); consensus
- voting (25937); flushing log callbacks (25951); honoring delayed
- SIGNEWNYM requests (25949); rescanning the consensus cache
- (25931); saving the state file to disk (25948); warning relay
- operators about unreachable ports (25952); and keeping track of
- Tor's uptime (26009).
- o Minor features (accounting):
- - When Tor becomes dormant, it now uses a scheduled event to wake up
- at the right time. Previously, we would use the per-second timer
- to check whether to wake up, but we no longer have any per-second
- timers enabled when the network is disabled. Closes ticket 26064.
- o Minor features (bug workaround):
- - Compile correctly on systems that provide the C11 stdatomic.h
- header, but where C11 atomic functions don't actually compile.
- Closes ticket 26779; workaround for Debian issue 903709.
- o Minor features (code quality):
- - Add optional spell-checking for the Tor codebase, using the
- "misspell" program. To use this feature, run "make check-typos".
- Closes ticket 25024.
- o Minor features (compatibility):
- - Tell OpenSSL to maintain backward compatibility with previous
- RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
- ciphers are disabled by default. Closes ticket 27344.
- - Tor now detects versions of OpenSSL 1.1.0 and later compiled with
- the no-deprecated option, and builds correctly with them. Closes
- tickets 19429, 19981, and 25353.
- o Minor features (compilation):
- - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
- tell the compiler not to include the system malloc implementation.
- Fixes bug 20424; bugfix on 0.2.0.20-rc.
- - Don't try to use a pragma to temporarily disable the
- -Wunused-const-variable warning if the compiler doesn't support
- it. Fixes bug 26785; bugfix on 0.3.2.11.
- - When building Tor, prefer to use Python 3 over Python 2, and more
- recent (contemplated) versions over older ones. Closes
- ticket 26372.
- o Minor features (compression, zstd):
- - When running with zstd, Tor now considers using advanced functions
- that the zstd maintainers have labeled as potentially unstable. To
- prevent breakage, Tor will only use this functionality when the
- runtime version of the zstd library matches the version with which
- Tor was compiled. Closes ticket 25162.
- o Minor features (configuration):
- - The "DownloadSchedule" options have been renamed to end with
- "DownloadInitialDelay". The old names are still allowed, but will
- produce a warning. Comma-separated lists are still permitted for
- these options, but all values after the first are ignored (as they
- have been since 0.2.9). Closes ticket 23354.
- o Minor features (continuous integration):
- - Log the compiler path and version during Appveyor builds.
- Implements ticket 27449.
- - Show config.log and test-suite.log after failed Appveyor builds.
- Also upload the zipped full logs as a build artifact. Implements
- ticket 27430.
- - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
- - Enable macOS builds in our Travis CI configuration. Closes
- ticket 24629.
- - Install libcap-dev and libseccomp2-dev so these optional
- dependencies get tested on Travis CI. Closes ticket 26560.
- - Only post Appveyor IRC notifications when the build fails.
- Implements ticket 27275.
- - Run asciidoc during Travis CI. Implements ticket 27087.
- - Use ccache in our Travis CI configuration. Closes ticket 26952.
- - Add the necessary configuration files for continuous integration
- testing on Windows, via the Appveyor platform. Closes ticket
- 25549. Patches from Marcin Cieślak and Isis Lovecruft.
- o Minor features (continuous integration, rust):
- - Use cargo cache in our Travis CI configuration. Closes
- ticket 26952.
- o Minor features (control port):
- - Introduce GETINFO "current-time/{local,utc}" to return the local
- and UTC times respectively in ISO format. This helps a controller
- like Tor Browser detect a time-related error. Closes ticket 25511.
- Patch by Neel Chauhan.
- - Introduce new fields to the CIRC_BW event. There are two new
- fields in each of the read and written directions. The DELIVERED
- fields report the total valid data on the circuit, as measured by
- the payload sizes of verified and error-checked relay command
- cells. The OVERHEAD fields report the total unused bytes in each
- of these cells. Closes ticket 25903.
- o Minor features (controller):
- - The control port now exposes the list of HTTPTunnelPorts and
- ExtOrPorts via GETINFO net/listeners/httptunnel and
- net/listeners/extor respectively. Closes ticket 26647.
- o Minor features (directory authorities):
- - Stop warning about incomplete bw lines before the first complete
- bw line has been found, so that additional header lines can be
- ignored. Fixes bug 25960; bugfix on 0.2.2.1-alpha
- - Authorities no longer vote to make the subprotocol version
- "LinkAuth=1" a requirement: it is unsupportable with NSS, and
- hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
- o Minor features (directory authority):
- - Directory authorities now open their key-pinning files as O_SYNC,
- to limit their chances of accidentally writing partial lines.
- Closes ticket 23909.
- o Minor features (directory authority, forward compatibility):
- - Make the lines of the measured bandwidth file able to contain
- their entries in any order. Previously, the node_id entry needed
- to come first. Closes ticket 26004.
- o Minor features (entry guards):
- - Introduce a new torrc option NumPrimaryGuards for controlling the
- number of primary guards. Closes ticket 25843.
- o Minor features (geoip):
- - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
- Country database. Closes ticket 27089.
- o Minor features (performance):
- - Avoid a needless call to malloc() when processing an incoming
- relay cell. Closes ticket 24914.
- - Make our timing-wheel code run a tiny bit faster on 32-bit
- platforms, by preferring 32-bit math to 64-bit. Closes
- ticket 24688.
- - Avoid a needless malloc()/free() pair every time we handle an ntor
- handshake. Closes ticket 25150.
- o Minor features (Rust, portability):
- - Rust cross-compilation is now supported. Closes ticket 25895.
- o Minor features (testing):
- - Add a unit test for voting_schedule_get_start_of_next_interval().
- Closes ticket 26014, and helps make unit test coverage
- more deterministic.
- - A new unittests module specifically for testing the functions in
- the (new-ish) bridges.c module has been created with new
- unittests, raising the code coverage percentages. Closes 25425.
- - We now have improved testing for addressmap_get_virtual_address()
- function. This should improve our test coverage, and make our test
- coverage more deterministic. Closes ticket 25993.
- o Minor features (timekeeping, circuit scheduling):
- - When keeping track of how busy each circuit have been recently on
- a given connection, use coarse-grained monotonic timers rather
- than gettimeofday(). This change should marginally increase
- accuracy and performance. Implements part of ticket 25927.
- o Minor features (unit tests):
- - Test complete bandwidth measurements files, and test that
- incomplete bandwidth lines only give warnings when the end of the
- header has not been detected. Fixes bug 25947; bugfix
- on 0.2.2.1-alpha
- o Minor bugfixes (bandwidth management):
- - Consider ourselves "low on write bandwidth" if we have exhausted
- our write bandwidth some time in the last second. This was the
- documented behavior before, but the actual behavior was to change
- this value every TokenBucketRefillInterval. Fixes bug 25828;
- bugfix on 0.2.3.5-alpha.
- o Minor bugfixes (C correctness):
- - Add a missing lock acquisition in the shutdown code of the control
- subsystem. Fixes bug 25675; bugfix on 0.2.7.3-rc. Found by
- Coverity; this is CID 1433643.
- o Minor bugfixes (code style):
- - Fixed multiple includes of transports.h in src/or/connection.c
- Fixes bug 25261; bugfix on 0.2.5.1-alpha.
- - Remove the unused variable n_possible from the function
- channel_get_for_extend(). Fixes bug 25645; bugfix on 0.2.4.4-alpha
- o Minor bugfixes (compilation):
- - Silence a spurious compiler warning on the GetAdaptersAddresses
- function pointer cast. This issue is already fixed by 26481 in
- 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
- bugfix on 0.2.3.11-alpha.
- - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
- supported, and always fails. Some compilers warn about the
- function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
- on 0.2.2.23-alpha.
- - Fix a compilation warning on some versions of GCC when building
- code that calls routerinfo_get_my_routerinfo() twice, assuming
- that the second call will succeed if the first one did. Fixes bug
- 26269; bugfix on 0.2.8.2-alpha.
- - Refrain from compiling unit testing related object files when
- --disable-unittests is set to configure script. Fixes bug 24891;
- bugfix on 0.2.5.1-alpha.
- - The --enable-fatal-warnings flag now affects Rust code as well.
- Closes ticket 26245.
- - Avoid a compiler warning when casting the return value of
- smartlist_len() to double with DEBUG_SMARTLIST enabled. Fixes bug
- 26283; bugfix on 0.2.4.10-alpha.
- o Minor bugfixes (compilation, windows):
- - Don't link or search for pthreads when building for Windows, even
- if we are using build environment (like mingw) that provides a
- pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
- o Minor bugfixes (continuous integration):
- - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
- - Skip a pair of unreliable key generation tests on Windows, until
- the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
- bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
- o Minor bugfixes (control port):
- - Respond with more human-readable error messages to GETINFO exit-
- policy
- 24" that contain
- both a wildcard address and a bit prefix length. This affects all
- our address-range parsing code. Fixes bug 7484; bugfix
- on 0.0.2pre14.
- o Minor bugfixes (bridge clients):
- - When configured to use a bridge without an identity digest (not
- recommended), avoid launching an extra channel to it when
- bootstrapping. Fixes bug 7733; bugfix on 0.2.4.4-alpha.
- o Minor bugfixes (bridges):
- - When DisableNetwork is set, do not launch pluggable transport
- plugins, and if any are running, terminate them. Fixes bug 13213;
- bugfix on 0.2.3.6-alpha.
- o Minor bugfixes (C correctness):
- - Fix several instances of possible integer overflow/underflow/NaN.
- Fixes bug 13104; bugfix on 0.2.3.1-alpha and later. Patches
- from "teor".
- - In circuit_build_times_calculate_timeout() in circuitstats.c,
- avoid dividing by zero in the pareto calculations. This traps
- under clang's "undefined-trap" sanitizer. Fixes bug 13290; bugfix
- on 0.2.2.2-alpha.
- - Fix an integer overflow in format_time_interval(). Fixes bug
- 13393; bugfix on 0.2.0.10-alpha.
- - Set the correct day of year value when the system's localtime(_r)
- or gmtime(_r) functions fail to set struct tm. Not externally
- visible. Fixes bug 13476; bugfix on 0.0.2pre14.
- - Avoid unlikely signed integer overflow in tor_timegm on systems
- with 32-bit time_t. Fixes bug 13476; bugfix on 0.0.2pre14.
- o Minor bugfixes (certificate handling):
- - If an authority operator accidentally makes a signing certificate
- with a future publication time, do not discard its real signing
- certificates. Fixes bug 11457; bugfix on 0.2.0.3-alpha.
- - Remove any old authority certificates that have been superseded
- for at least two days. Previously, we would keep superseded
- certificates until they expired, if they were published close in
- time to the certificate that superseded them. Fixes bug 11454;
- bugfix on 0.2.1.8-alpha.
- o Minor bugfixes (client):
- - Fix smartlist_choose_node_by_bandwidth() so that relays with the
- BadExit flag are not considered worthy candidates. Fixes bug
- 13066; bugfix on 0.1.2.3-alpha.
- - Use the consensus schedule for downloading consensuses, and not
- the generic schedule. Fixes bug 11679; bugfix on 0.2.2.6-alpha.
- - Handle unsupported or malformed SOCKS5 requests properly by
- responding with the appropriate error message before closing the
- connection. Fixes bugs 12971 and 13314; bugfix on 0.0.2pre13.
- o Minor bugfixes (client, automapping):
- - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
- no value follows the option. Fixes bug 14142; bugfix on
- 0.2.4.7-alpha. Patch by "teor".
- - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
- 14195; bugfix on 0.1.0.1-rc.
- - Prevent changes to other options from removing the wildcard value
- "." from "AutomapHostsSuffixes". Fixes bug 12509; bugfix
- on 0.2.0.1-alpha.
- - Allow MapAddress and AutomapHostsOnResolve to work together when
- an address is mapped into another address type (like .onion) that
- must be automapped at resolve time. Fixes bug 7555; bugfix
- on 0.2.0.1-alpha.
- o Minor bugfixes (client, bridges):
- - When we are using bridges and we had a network connectivity
- problem, only retry connecting to our currently configured
- bridges, not all bridges we know about and remember using. Fixes
- bug 14216; bugfix on 0.2.2.17-alpha.
- o Minor bugfixes (client, DNS):
- - Report the correct cached DNS expiration times on SOCKS port or in
- DNS replies. Previously, we would report everything as "never
- expires." Fixes bug 14193; bugfix on 0.2.3.17-beta.
- - Avoid a small memory leak when we find a cached answer for a
- reverse DNS lookup in a client-side DNS cache. (Remember, client-
- side DNS caching is off by default, and is not recommended.) Fixes
- bug 14259; bugfix on 0.2.0.1-alpha.
- o Minor bugfixes (client, IPv6):
- - Reject socks requests to literal IPv6 addresses when IPv6Traffic
- flag is not set; and not because the NoIPv4Traffic flag was set.
- Previously we'd looked at the NoIPv4Traffic flag for both types of
- literal addresses. Fixes bug 14280; bugfix on 0.2.4.7-alpha.
- o Minor bugfixes (client, microdescriptors):
- - Use a full 256 bits of the SHA256 digest of a microdescriptor when
- computing which microdescriptors to download. This keeps us from
- erroneous download behavior if two microdescriptor digests ever
- have the same first 160 bits. Fixes part of bug 13399; bugfix
- on 0.2.3.1-alpha.
- - Reset a router's status if its microdescriptor digest changes,
- even if the first 160 bits remain the same. Fixes part of bug
- 13399; bugfix on 0.2.3.1-alpha.
- o Minor bugfixes (client, torrc):
- - Stop modifying the value of our DirReqStatistics torrc option just
- because we're not a bridge or relay. This bug was causing Tor
- Browser users to write "DirReqStatistics 0" in their torrc files
- as if they had chosen to change the config. Fixes bug 4244; bugfix
- on 0.2.3.1-alpha.
- - When GeoIPExcludeUnknown is enabled, do not incorrectly decide
- that our options have changed every time we SIGHUP. Fixes bug
- 9801; bugfix on 0.2.4.10-alpha. Patch from "qwerty1".
- o Minor bugfixes (compilation):
- - Fix a compilation warning on s390. Fixes bug 14988; bugfix
- on 0.2.5.2-alpha.
- - Silence clang warnings under --enable-expensive-hardening,
- including implicit truncation of 64 bit values to 32 bit, const
- char assignment to self, tautological compare, and additional
- parentheses around equality tests. Fixes bug 13577; bugfix
- on 0.2.5.4-alpha.
- - Fix a clang warning about checking whether an address in the
- middle of a structure is NULL. Fixes bug 14001; bugfix
- on 0.2.1.2-alpha.
- - The address of an array in the middle of a structure will always
- be non-NULL. clang recognises this and complains. Disable the
- tautologous and redundant check to silence this warning. Fixes bug
- 14001; bugfix on 0.2.1.2-alpha.
- - Compile correctly with (unreleased) OpenSSL 1.1.0 headers.
- Addresses ticket 14188.
- - Build without warnings with the stock OpenSSL srtp.h header, which
- has a duplicate declaration of SSL_get_selected_srtp_profile().
- Fixes bug 14220; this is OpenSSL's bug, not ours.
- - Do not compile any code related to Tor2Web mode when Tor2Web mode
- is not enabled at compile time. Previously, this code was included
- in a disabled state. See discussion on ticket 12844.
- - Allow our configure script to build correctly with autoconf 2.62
- again. Fixes bug 12693; bugfix on 0.2.5.2-alpha.
- - Improve the error message from ./configure to make it clear that
- when asciidoc has not been found, the user will have to either add
- --disable-asciidoc argument or install asciidoc. Resolves
- ticket 13228.
- o Minor bugfixes (controller):
- - Report "down" in response to the "GETINFO entry-guards" command
- when relays are down with an unreachable_since value. Previously,
- we would report "up". Fixes bug 14184; bugfix on 0.1.2.2-alpha.
- - Avoid crashing on a malformed EXTENDCIRCUIT command. Fixes bug
- 14116; bugfix on 0.2.2.9-alpha.
- o Minor bugfixes (controller):
- - Return an error when the second or later arguments of the
- "setevents" controller command are invalid events. Previously we
- would return success while silently skipping invalid events. Fixes
- bug 13205; bugfix on 0.2.3.2-alpha. Reported by "fpxnns".
- o Minor bugfixes (directory authority):
- - Allow directory authorities to fetch more data from one another if
- they find themselves missing lots of votes. Previously, they had
- been bumping against the 10 MB queued data limit. Fixes bug 14261;
- bugfix on 0.1.2.5-alpha.
- - Do not attempt to download extrainfo documents which we will be
- unable to validate with a matching server descriptor. Fixes bug
- 13762; bugfix on 0.2.0.1-alpha.
- - Fix a bug that was truncating AUTHDIR_NEWDESC events sent to the
- control port. Fixes bug 14953; bugfix on 0.2.0.1-alpha.
- - Enlarge the buffer to read bwauth generated files to avoid an
- issue when parsing the file in dirserv_read_measured_bandwidths().
- Fixes bug 14125; bugfix on 0.2.2.1-alpha.
- - When running as a v3 directory authority, advertise that you serve
- extra-info documents so that clients who want them can find them
- from you too. Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
- o Minor bugfixes (directory system):
- - Always believe that v3 directory authorities serve extra-info
- documents, whether they advertise "caches-extra-info" or not.
- Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
- - Check the BRIDGE_DIRINFO flag bitwise rather than using equality.
- Previously, directories offering BRIDGE_DIRINFO and some other
- flag (i.e. microdescriptors or extrainfo) would be ignored when
- looking for bridges. Partially fixes bug 13163; bugfix
- on 0.2.0.7-alpha.
- o Minor bugfixes (file handling):
- - Stop failing when key files are zero-length. Instead, generate new
- keys, and overwrite the empty key files. Fixes bug 13111; bugfix
- on all versions of Tor. Patch by "teor".
- - Stop generating a fresh .old RSA onion key file when the .old file
- is missing. Fixes part of 13111; bugfix on 0.0.6rc1.
- - Avoid overwriting .old key files with empty key files.
- - Skip loading zero-length extrainfo store, router store, stats,
- state, and key files.
- - Avoid crashing when trying to reload a torrc specified as a
- relative path with RunAsDaemon turned on. Fixes bug 13397; bugfix
- on 0.2.3.11-alpha.
- o Minor bugfixes (hidden services):
- - Close the introduction circuit when we have no more usable intro
- points, instead of waiting for it to time out. This also ensures
- that no follow-up HS descriptor fetch is triggered when the
- circuit eventually times out. Fixes bug 14224; bugfix on 0.0.6.
- - When fetching a hidden service descriptor for a down service that
- was recently up, do not keep refetching until we try the same
- replica twice in a row. Fixes bug 14219; bugfix on 0.2.0.10-alpha.
- - Correctly send a controller event when we find that a rendezvous
- circuit has finished. Fixes bug 13936; bugfix on 0.1.1.5-alpha.
- - Pre-check directory permissions for new hidden-services to avoid
- at least one case of "Bug: Acting on config options left us in a
- broken state. Dying." Fixes bug 13942; bugfix on 0.0.6pre1.
- - When fetching hidden service descriptors, we now check not only
- for whether we got the hidden service we had in mind, but also
- whether we got the particular descriptors we wanted. This prevents
- a class of inefficient but annoying DoS attacks by hidden service
- directories. Fixes bug 13214; bugfix on 0.2.1.6-alpha. Reported
- by "special".
- o Minor bugfixes (Linux seccomp2 sandbox):
- - Make transparent proxy support work along with the seccomp2
- sandbox. Fixes part of bug 13808; bugfix on 0.2.5.1-alpha. Patch
- by Francisco Blas Izquierdo Riera.
- - Fix a memory leak in tor-resolve when running with the sandbox
- enabled. Fixes bug 14050; bugfix on 0.2.5.9-rc.
- - Allow glibc fatal errors to be sent to stderr before Tor exits.
- Previously, glibc would try to write them to /dev/tty, and the
- sandbox would trap the call and make Tor exit prematurely. Fixes
- bug 14759; bugfix on 0.2.5.1-alpha.
- o Minor bugfixes (logging):
- - Avoid crashing when there are more log domains than entries in
- domain_list. Bugfix on 0.2.3.1-alpha.
- - Downgrade warnings about RSA signature failures to info log level.
- Emit a warning when an extra info document is found incompatible
- with a corresponding router descriptor. Fixes bug 9812; bugfix
- on 0.0.6rc3.
- - Make connection_ap_handshake_attach_circuit() log the circuit ID
- correctly. Fixes bug 13701; bugfix on 0.0.6.
- o Minor bugfixes (networking):
- - Check for orconns and use connection_or_close_for_error() rather
- than connection_mark_for_close() directly in the getsockopt()
- failure case of connection_handle_write_impl(). Fixes bug 11302;
- bugfix on 0.2.4.4-alpha.
- o Minor bugfixes (parsing):
- - Stop accepting milliseconds (or other junk) at the end of
- descriptor publication times. Fixes bug 9286; bugfix on 0.0.2pre25.
- - Support two-number and three-number version numbers correctly, in
- case we change the Tor versioning system in the future. Fixes bug
- 13661; bugfix on 0.0.8pre1.
- o Minor bugfixes (portability):
- - Fix the ioctl()-based network interface lookup code so that it
- will work on systems that have variable-length struct ifreq, for
- example Mac OS X.
- - Use the correct datatype in the SipHash-2-4 function to prevent
- compilers from assuming any sort of alignment. Fixes bug 15436;
- bugfix on 0.2.5.3-alpha.
- o Minor bugfixes (preventative security, C safety):
- - When reading a hexadecimal, base-32, or base-64 encoded value from
- a string, always overwrite the whole output buffer. This prevents
- some bugs where we would look at (but fortunately, not reveal)
- uninitialized memory on the stack. Fixes bug 14013; bugfix on all
- versions of Tor.
- - Clear all memory targeted by tor_addr_{to,from}_sockaddr(), not
- just the part that's used. This makes it harder for data leak bugs
- to occur in the event of other programming failures. Resolves
- ticket 14041.
- o Minor bugfixes (relay):
- - When generating our family list, remove spaces from around the
- entries. Fixes bug 12728; bugfix on 0.2.1.7-alpha.
- - If our previous bandwidth estimate was 0 bytes, allow publishing a
- new relay descriptor immediately. Fixes bug 13000; bugfix
- on 0.1.1.6-alpha.
- o Minor bugfixes (shutdown):
- - When shutting down, always call event_del() on lingering read or
- write events before freeing them. Otherwise, we risk double-frees
- or read-after-frees in event_base_free(). Fixes bug 12985; bugfix
- on 0.1.0.2-rc.
- o Minor bugfixes (small memory leaks):
- - Avoid leaking memory when using IPv6 virtual address mappings.
- Fixes bug 14123; bugfix on 0.2.4.7-alpha. Patch by Tom van
- der Woerdt.
- o Minor bugfixes (statistics):
- - Increase period over which bandwidth observations are aggregated
- from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
- o Minor bugfixes (systemd support):
- - Run correctly under systemd with the RunAsDaemon option set. Fixes
- part of bug 14141; bugfix on 0.2.5.7-rc. Patch from Tomasz Torcz.
- - Inform the systemd supervisor about more changes in the Tor
- process status. Implements part of ticket 14141. Patch from
- Tomasz Torcz.
- o Minor bugfixes (testing networks):
- - Fix TestingDirAuthVoteGuard to properly give out Guard flags in a
- testing network. Fixes bug 13064; bugfix on 0.2.5.2-alpha.
- - Stop using the default authorities in networks which provide both
- AlternateDirAuthority and AlternateBridgeAuthority. Partially
- fixes bug 13163; bugfix on 0.2.0.13-alpha.
- o Minor bugfixes (testing networks, fast startup):
- - Allow Tor to build circuits using a consensus with no exits. If
- the consensus has no exits (typical of a bootstrapping test
- network), allow Tor to build circuits once enough descriptors have
- been downloaded. This assists in bootstrapping a testing Tor
- network. Fixes bug 13718; bugfix on 0.2.4.10-alpha. Patch
- by "teor".
- - When V3AuthVotingInterval is low, give a lower If-Modified-Since
- header to directory servers. This allows us to obtain consensuses
- promptly when the consensus interval is very short. This assists
- in bootstrapping a testing Tor network. Fixes parts of bugs 13718
- and 13963; bugfix on 0.2.0.3-alpha. Patch by "teor".
- - Stop assuming that private addresses are local when checking
- reachability in a TestingTorNetwork. Instead, when testing, assume
- all OR connections are remote. (This is necessary due to many test
- scenarios running all relays on localhost.) This assists in
- bootstrapping a testing Tor network. Fixes bug 13924; bugfix on
- 0.1.0.1-rc. Patch by "teor".
- - Avoid building exit circuits from a consensus with no exits. Now
- thanks to our fix for 13718, we accept a no-exit network as not
- wholly lost, but we need to remember not to try to build exit
- circuits on it. Closes ticket 13814; patch by "teor".
- - Stop requiring exits to have non-zero bandwithcapacity in a
- TestingTorNetwork. Instead, when TestingMinExitFlagThreshold is 0,
- ignore exit bandwidthcapacity. This assists in bootstrapping a
- testing Tor network. Fixes parts of bugs 13718 and 13839; bugfix
- on 0.2.0.3-alpha. Patch by "teor".
- - Add "internal" to some bootstrap statuses when no exits are
- available. If the consensus does not contain Exits, Tor will only
- build internal circuits. In this case, relevant statuses will
- contain the word "internal" as indicated in the Tor control-
- spec.txt. When bootstrap completes, Tor will be ready to build
- internal circuits. If a future consensus contains Exits, exit
- circuits may become available. Fixes part of bug 13718; bugfix on
- 0.2.4.10-alpha. Patch by "teor".
- - Decrease minimum consensus interval to 10 seconds when
- TestingTorNetwork is set, or 5 seconds for the first consensus.
- Fix assumptions throughout the code that assume larger intervals.
- Fixes bugs 13718 and 13823; bugfix on 0.2.0.3-alpha. Patch
- by "teor".
- - Avoid excluding guards from path building in minimal test
- networks, when we're in a test network and excluding guards would
- exclude all relays. This typically occurs in incredibly small tor
- networks, and those using "TestingAuthVoteGuard *". Fixes part of
- bug 13718; bugfix on 0.1.1.11-alpha. Patch by "teor".
- o Minor bugfixes (testing):
- - Avoid a side-effect in a tor_assert() in the unit tests. Fixes bug
- 15188; bugfix on 0.1.2.3-alpha. Patch from Tom van der Woerdt.
- - Stop spawn test failures due to a race condition between the
- SIGCHLD handler updating the process status, and the test reading
- it. Fixes bug 13291; bugfix on 0.2.3.3-alpha.
- - Avoid passing an extra backslash when creating a temporary
- directory for running the unit tests on Windows. Fixes bug 12392;
- bugfix on 0.2.2.25-alpha. Patch from Gisle Vanem.
- o Minor bugfixes (TLS):
- - Check more thoroughly throughout the TLS code for possible
- unlogged TLS errors. Possible diagnostic or fix for bug 13319.
- o Minor bugfixes (transparent proxy):
- - Use getsockname, not getsockopt, to retrieve the address for a
- TPROXY-redirected connection. Fixes bug 13796; bugfix
- on 0.2.5.2-alpha.
- o Minor bugfixes (windows):
- - Remove code to special-case handling of NTE_BAD_KEYSET when
- acquiring windows CryptoAPI context. This error can't actually
- occur for the parameters we're providing. Fixes bug 10816; bugfix
- on 0.0.2pre26.
- o Minor bugfixes (zlib):
- - Avoid truncating a zlib stream when trying to finalize it with an
- empty output buffer. Fixes bug 11824; bugfix on 0.1.1.23.
- o Code simplification and refactoring:
- - Change the entry_is_live() function to take named bitfield
- elements instead of an unnamed list of booleans. Closes
- ticket 12202.
- - Refactor and unit-test entry_is_time_to_retry() in entrynodes.c.
- Resolves ticket 12205.
- - Use calloc and reallocarray functions instead of multiply-
- then-malloc. This makes it less likely for us to fall victim to an
- integer overflow attack when allocating. Resolves ticket 12855.
- - Use the standard macro name SIZE_MAX, instead of our
- own SIZE_T_MAX.
- - Document usage of the NO_DIRINFO and ALL_DIRINFO flags clearly in
- functions which take them as arguments. Replace 0 with NO_DIRINFO
- in a function call for clarity. Seeks to prevent future issues
- like 13163.
- - Avoid 4 null pointer errors under clang static analysis by using
- tor_assert() to prove that the pointers aren't null. Fixes
- bug 13284.
- - Rework the API of policies_parse_exit_policy() to use a bitmask to
- represent parsing options, instead of a confusing mess of
- booleans. Resolves ticket 8197.
- - Introduce a helper function to parse ExitPolicy in
- or_options_t structure.
- - Move fields related to isolating and configuring client ports into
- a shared structure. Previously, they were duplicated across
- port_cfg_t, listener_connection_t, and edge_connection_t. Failure
- to copy them correctly had been the cause of at least one bug in
- the past. Closes ticket 8546.
- - Refactor the get_interface_addresses_raw() doom-function into
- multiple smaller and simpler subfunctions. Cover the resulting
- subfunctions with unit-tests. Fixes a significant portion of
- issue 12376.
- - Remove workaround in dirserv_thinks_router_is_hs_dir() that was
- only for version <= 0.2.2.24 which is now deprecated. Closes
- ticket 14202.
- - Remove a test for a long-defunct broken version-one
- directory server.
- - Refactor main loop to extract the 'loop' part. This makes it
- easier to run Tor under Shadow. Closes ticket 15176.
- - Stop using can_complete_circuits as a global variable; access it
- with a function instead.
- - Avoid using operators directly as macro arguments: this lets us
- apply coccinelle transformations to our codebase more directly.
- Closes ticket 13172.
- - Combine the functions used to parse ClientTransportPlugin and
- ServerTransportPlugin into a single function. Closes ticket 6456.
- - Add inline functions and convenience macros for inspecting channel
- state. Refactor the code to use convenience macros instead of
- checking channel state directly. Fixes issue 7356.
- - Document all members of was_router_added_t and rename
- ROUTER_WAS_NOT_NEW to ROUTER_IS_ALREADY_KNOWN to make it less
- confusable with ROUTER_WAS_TOO_OLD. Fixes issue 13644.
- - In connection_exit_begin_conn(), use END_CIRC_REASON_TORPROTOCOL
- constant instead of hardcoded value. Fixes issue 13840.
- - Refactor our generic strmap and digestmap types into a single
- implementation, so that we can add a new digest256map
- type trivially.
- o Documentation:
- - Add a doc/TUNING document with tips for handling large numbers of
- TCP connections when running busy Tor relay. Update the warning
- message to point to this file when running out of sockets
- operating system is allowing to use simultaneously. Resolves
- ticket 9708.
- - Adding section on OpenBSD to our TUNING document. Thanks to mmcc
- for writing the OpenBSD-specific tips. Resolves ticket 13702.
- - Make the tor-resolve documentation match its help string and its
- options. Resolves part of ticket 14325.
- - Log a more useful error message from tor-resolve when failing to
- look up a hidden service address. Resolves part of ticket 14325.
- - Document the bridge-authority-only 'networkstatus-bridges' file.
- Closes ticket 13713; patch from "tom".
- - Fix typo in PredictedPortsRelevanceTime option description in
- manpage. Resolves issue 13707.
- - Stop suggesting that users specify relays by nickname: it isn't a
- good idea. Also, properly cross-reference how to specify relays in
- all parts of manual documenting options that take a list of
- relays. Closes ticket 13381.
- - Clarify the HiddenServiceDir option description in manpage to make
- it clear that relative paths are taken with respect to the current
- working directory. Also clarify that this behavior is not
- guaranteed to remain indefinitely. Fixes issue 13913.
- o Distribution (systemd):
- - systemd unit file: only allow tor to write to /var/lib/tor and
- /var/log/tor. The rest of the filesystem is accessible for reading
- only. Patch by intrigeri; resolves ticket 12751.
- - systemd unit file: ensure that the process and all its children
- can never gain new privileges. Patch by intrigeri; resolves
- ticket 12939.
- - systemd unit file: set up /var/run/tor as writable for the Tor
- service. Patch by intrigeri; resolves ticket 13196.
- o Downgraded warnings:
- - Don't warn when we've attempted to contact a relay using the wrong
- ntor onion key. Closes ticket 9635.
- o Removed code:
- - Remove some lingering dead code that once supported mempools.
- Mempools were disabled by default in 0.2.5, and removed entirely
- in 0.2.6.3-alpha. Closes more of ticket 14848; patch
- by "cypherpunks".
- o Removed features (directory authorities):
- - Remove code that prevented authorities from listing Tor relays
- affected by CVE-2011-2769 as guards. These relays are already
- rejected altogether due to the minimum version requirement of
- 0.2.3.16-alpha. Closes ticket 13152.
- - The "AuthDirRejectUnlisted" option no longer has any effect, as
- the fingerprints file (approved-routers) has been deprecated.
- - Directory authorities do not support being Naming dirauths anymore.
- The "NamingAuthoritativeDir" config option is now obsolete.
- - Directory authorities do not support giving out the BadDirectory
- flag anymore.
- - Directory authorities no longer advertise or support consensus
- methods 1 through 12 inclusive. These consensus methods were
- obsolete and/or insecure: maintaining the ability to support them
- served no good purpose. Implements part of proposal 215; closes
- ticket 10163.
- o Removed features:
- - To avoid confusion with the "ExitRelay" option, "ExitNode" is no
- longer silently accepted as an alias for "ExitNodes".
- - The --enable-mempool and --enable-buf-freelists options, which
- were originally created to work around bad malloc implementations,
- no longer exist. They were off-by-default in 0.2.5. Closes
- ticket 14848.
- - We no longer remind the user about configuration options that have
- been obsolete since 0.2.3.x or earlier. Patch by Adrien Bak.
- - Remove our old, non-weighted bandwidth-based node selection code.
- Previously, we used it as a fallback when we couldn't perform
- weighted bandwidth-based node selection. But that would only
- happen in the cases where we had no consensus, or when we had a
- consensus generated by buggy or ancient directory authorities. In
- either case, it's better to use the more modern, better maintained
- algorithm, with reasonable defaults for the weights. Closes
- ticket 13126.
- - Remove the --disable-curve25519 configure option. Relays and
- clients now are required to support curve25519 and the
- ntor handshake.
- - The old "StrictEntryNodes" and "StrictExitNodes" options, which
- used to be deprecated synonyms for "StrictNodes", are now marked
- obsolete. Resolves ticket 12226.
- - Clients don't understand the BadDirectory flag in the consensus
- anymore, and ignore it.
- o Removed platform support:
- - We no longer include special code to build on Windows CE; as far
- as we know, nobody has used Tor on Windows CE in a very long time.
- Closes ticket 11446.
- o Testing (test-network.sh):
- - Stop using "echo -n", as some shells' built-in echo doesn't
- support "-n". Instead, use "/bin/echo -n". Partially fixes
- bug 13161.
- - Stop an apparent test-network hang when used with make -j2. Fixes
- bug 13331.
- - Add a --delay option to test-network.sh, which configures the
- delay before the chutney network tests for data transmission.
- Partially implements ticket 13161.
- o Testing:
- - Test that tor does not fail when key files are zero-length. Check
- that tor generates new keys, and overwrites the empty key files.
- - Test that tor generates new keys when keys are missing
- (existing behavior).
- - Test that tor does not overwrite key files that already contain
- data (existing behavior). Tests bug 13111. Patch by "teor".
- - New "make test-stem" target to run stem integration tests.
- Requires that the "STEM_SOURCE_DIR" environment variable be set.
- Closes ticket 14107.
- - Make the test_cmdline_args.py script work correctly on Windows.
- Patch from Gisle Vanem.
- - Move the slower unit tests into a new "./src/test/test-slow"
- binary that can be run independently of the other tests. Closes
- ticket 13243.
- - New tests for many parts of channel, relay, and circuitmux
- functionality. Code by Andrea; part of 9262.
- - New tests for parse_transport_line(). Part of ticket 6456.
- - In the unit tests, use chgrp() to change the group of the unit
- test temporary directory to the current user, so that the sticky
- bit doesn't interfere with tests that check directory groups.
- Closes 13678.
- - Add unit tests for resolve_my_addr(). Part of ticket 12376; patch
- by 'rl1987'.
- - Refactor the function that chooses guard nodes so that it can more
- easily be tested; write some tests for it.
- - Fix and re-enable the fgets_eagain unit test. Fixes bug 12503;
- bugfix on 0.2.3.1-alpha. Patch from "cypherpunks."
- - Create unit tests for format_time_interval(). With bug 13393.
- - Add unit tests for tor_timegm signed overflow, tor_timegm and
- parse_rfc1123_time validity checks, correct_tm year clamping. Unit
- tests (visible) fixes in bug 13476.
- - Add a "coverage-html" make target to generate HTML-visualized
- coverage results when building with --enable-coverage. (Requires
- lcov.) Patch from Kevin Murray.
- - Enable the backtrace handler (where supported) when running the
- unit tests.
- - Revise all unit tests that used the legacy test_* macros to
- instead use the recommended tt_* macros. This patch was generated
- with coccinelle, to avoid manual errors. Closes ticket 13119.
- Changes in version 0.2.5.11 - 2015-03-17
- Tor 0.2.5.11 is the second stable release in the 0.2.5 series.
- It backports several bugfixes from the 0.2.6 branch, including a
- couple of medium-level security fixes for relays and exit nodes.
- It also updates the list of directory authorities.
- o Directory authority changes:
- - Remove turtles as a directory authority.
- - Add longclaw as a new (v3) directory authority. This implements
- ticket 13296. This keeps the directory authority count at 9.
- - The directory authority Faravahar has a new IP address. This
- closes ticket 14487.
- o Major bugfixes (crash, OSX, security):
- - Fix a remote denial-of-service opportunity caused by a bug in
- OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
- in OSX 10.9.
- o Major bugfixes (relay, stability, possible security):
- - Fix a bug that could lead to a relay crashing with an assertion
- failure if a buffer of exactly the wrong layout was passed to
- buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
- 0.2.0.10-alpha. Patch from 'cypherpunks'.
- - Do not assert if the 'data' pointer on a buffer is advanced to the
- very end of the buffer; log a BUG message instead. Only assert if
- it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
- o Major bugfixes (exit node stability):
- - Fix an assertion failure that could occur under high DNS load.
- Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
- diagnosed and fixed by "cypherpunks".
- o Major bugfixes (Linux seccomp2 sandbox):
- - Upon receiving sighup with the seccomp2 sandbox enabled, do not
- crash during attempts to call wait4. Fixes bug 15088; bugfix on
- 0.2.5.1-alpha. Patch from "sanic".
- o Minor features (controller):
- - New "GETINFO bw-event-cache" to get information about recent
- bandwidth events. Closes ticket 14128. Useful for controllers to
- get recent bandwidth history after the fix for ticket 13988.
- o Minor features (geoip):
- - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
- - Update geoip6 to the March 3 2015 Maxmind GeoLite2
- Country database.
- o Minor bugfixes (client, automapping):
- - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
- no value follows the option. Fixes bug 14142; bugfix on
- 0.2.4.7-alpha. Patch by "teor".
- - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
- 14195; bugfix on 0.1.0.1-rc.
- o Minor bugfixes (compilation):
- - Build without warnings with the stock OpenSSL srtp.h header, which
- has a duplicate declaration of SSL_get_selected_srtp_profile().
- Fixes bug 14220; this is OpenSSL's bug, not ours.
- o Minor bugfixes (directory authority):
- - Allow directory authorities to fetch more data from one another if
- they find themselves missing lots of votes. Previously, they had
- been bumping against the 10 MB queued data limit. Fixes bug 14261;
- bugfix on 0.1.2.5-alpha.
- - Enlarge the buffer to read bwauth generated files to avoid an
- issue when parsing the file in dirserv_read_measured_bandwidths().
- Fixes bug 14125; bugfix on 0.2.2.1-alpha.
- o Minor bugfixes (statistics):
- - Increase period over which bandwidth observations are aggregated
- from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
- o Minor bugfixes (preventative security, C safety):
- - When reading a hexadecimal, base-32, or base-64 encoded value from
- a string, always overwrite the whole output buffer. This prevents
- some bugs where we would look at (but fortunately, not reveal)
- uninitialized memory on the stack. Fixes bug 14013; bugfix on all
- versions of Tor.
- Changes in version 0.2.4.26 - 2015-03-17
- Tor 0.2.4.26 includes an updated list of directory authorities. It
- also backports a couple of stability and security bugfixes from 0.2.5
- and beyond.
- o Directory authority changes:
- - Remove turtles as a directory authority.
- - Add longclaw as a new (v3) directory authority. This implements
- ticket 13296. This keeps the directory authority count at 9.
- - The directory authority Faravahar has a new IP address. This
- closes ticket 14487.
- o Major bugfixes (exit node stability, also in 0.2.6.3-alpha):
- - Fix an assertion failure that could occur under high DNS load.
- Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
- diagnosed and fixed by "cypherpunks".
- o Major bugfixes (relay, stability, possible security, also in 0.2.6.4-rc):
- - Fix a bug that could lead to a relay crashing with an assertion
- failure if a buffer of exactly the wrong layout was passed to
- buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
- 0.2.0.10-alpha. Patch from 'cypherpunks'.
- - Do not assert if the 'data' pointer on a buffer is advanced to the
- very end of the buffer; log a BUG message instead. Only assert if
- it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
- o Minor features (geoip):
- - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
- - Update geoip6 to the March 3 2015 Maxmind GeoLite2
- Country database.
- Changes in version 0.2.5.10 - 2014-10-24
- Tor 0.2.5.10 is the first stable release in the 0.2.5 series.
- It adds several new security features, including improved
- denial-of-service resistance for relays, new compiler hardening
- options, and a system-call sandbox for hardened installations on Linux
- (requires seccomp2). The controller protocol has several new features,
- resolving IPv6 addresses should work better than before, and relays
- should be a little more CPU-efficient. We've added support for more
- OpenBSD and FreeBSD transparent proxy types. We've improved the build
- system and testing infrastructure to allow unit testing of more parts
- of the Tor codebase. Finally, we've addressed several nagging pluggable
- transport usability issues, and included numerous other small bugfixes
- and features mentioned below.
- This release marks end-of-life for Tor 0.2.3.x; those Tor versions
- have accumulated many known flaws; everyone should upgrade.
- o Major features (security):
- - The ntor handshake is now on-by-default, no matter what the
- directory authorities recommend. Implements ticket 8561.
- - Make the "tor-gencert" tool used by directory authority operators
- create 2048-bit signing keys by default (rather than 1024-bit, since
- 1024-bit is uncomfortably small these days). Addresses ticket 10324.
- - Warn about attempts to run hidden services and relays in the same
- process: that's probably not a good idea. Closes ticket 12908.
- - Disable support for SSLv3. All versions of OpenSSL in use with Tor
- today support TLS 1.0 or later, so we can safely turn off support
- for this old (and insecure) protocol. Fixes bug 13426.
- o Major features (relay security, DoS-resistance):
- - When deciding whether we have run out of memory and we need to
- close circuits, also consider memory allocated in buffers for
- streams attached to each circuit.
- This change, which extends an anti-DoS feature introduced in
- 0.2.4.13-alpha and improved in 0.2.4.14-alpha, lets Tor exit relays
- better resist more memory-based DoS attacks than before. Since the
- MaxMemInCellQueues option now applies to all queues, it is renamed
- to MaxMemInQueues. This feature fixes bug 10169.
- - Avoid hash-flooding denial-of-service attacks by using the secure
- SipHash-2-4 hash function for our hashtables. Without this
- feature, an attacker could degrade performance of a targeted
- client or server by flooding their data structures with a large
- number of entries to be stored at the same hash table position,
- thereby slowing down the Tor instance. With this feature, hash
- table positions are derived from a randomized cryptographic key,
- and an attacker cannot predict which entries will collide. Closes
- ticket 4900.
- - If you don't specify MaxMemInQueues yourself, Tor now tries to
- pick a good value based on your total system memory. Previously,
- the default was always 8 GB. You can still override the default by
- setting MaxMemInQueues yourself. Resolves ticket 11396.
- o Major features (bridges and pluggable transports):
- - Add support for passing arguments to managed pluggable transport
- proxies. Implements ticket 3594.
- - Bridges now track GeoIP information and the number of their users
- even when pluggable transports are in use, and report usage
- statistics in their extra-info descriptors. Resolves tickets 4773
- and 5040.
- - Don't launch pluggable transport proxies if we don't have any
- bridges configured that would use them. Now we can list many
- pluggable transports, and Tor will dynamically start one when it
- hears a bridge address that needs it. Resolves ticket 5018.
- - The bridge directory authority now assigns status flags (Stable,
- Guard, etc) to bridges based on thresholds calculated over all
- Running bridges. Now bridgedb can finally make use of its features
- to e.g. include at least one Stable bridge in its answers. Fixes
- bug 9859.
- o Major features (controller):
- - Extend ORCONN controller event to include an "ID" parameter,
- and add four new controller event types CONN_BW, CIRC_BW,
- CELL_STATS, and TB_EMPTY that show connection and circuit usage.
- The new events are emitted in private Tor networks only, with the
- goal of being able to better track performance and load during
- full-network simulations. Implements proposal 218 and ticket 7359.
- o Major features (relay performance):
- - Speed up server-side lookups of rendezvous and introduction point
- circuits by using hashtables instead of linear searches. These
- functions previously accounted between 3 and 7% of CPU usage on
- some busy relays. Resolves ticket 9841.
- - Avoid wasting CPU when extending a circuit over a channel that is
- nearly out of circuit IDs. Previously, we would do a linear scan
- over possible circuit IDs before finding one or deciding that we
- had exhausted our possibilities. Now, we try at most 64 random
- circuit IDs before deciding that we probably won't succeed. Fixes
- a possible root cause of ticket 11553.
- o Major features (seccomp2 sandbox, Linux only):
- - Use the seccomp2 syscall filtering facility on Linux to limit
- which system calls Tor can invoke. This is an experimental,
- Linux-only feature to provide defense-in-depth against unknown
- attacks. To try turning it on, set "Sandbox 1" in your torrc
- file. Please be ready to report bugs. We hope to add support
- for better sandboxing in the future, including more fine-grained
- filters, better division of responsibility, and support for more
- platforms. This work has been done by Cristian-Matei Toader for
- Google Summer of Code. Resolves tickets 11351 and 11465.
- o Major features (testing networks):
- - Make testing Tor networks bootstrap better: lower directory fetch
- retry schedules and maximum interval without directory requests,
- and raise maximum download tries. Implements ticket 6752.
- - Add make target 'test-network' to run tests on a Chutney network.
- Implements ticket 8530.
- o Major features (other):
- - On some platforms (currently: recent OSX versions, glibc-based
- platforms that support the ELF format, and a few other
- Unix-like operating systems), Tor can now dump stack traces
- when a crash occurs or an assertion fails. By default, traces
- are dumped to stderr (if possible) and to any logs that are
- reporting errors. Implements ticket 9299.
- o Deprecated versions:
- - Tor 0.2.3.x has reached end-of-life; it has received no patches or
- attention for some while.
- o Major bugfixes (security, directory authorities):
- - Directory authorities now include a digest of each relay's
- identity key as a part of its microdescriptor.
- This is a workaround for bug 11743 (reported by "cypherpunks"),
- where Tor clients do not support receiving multiple
- microdescriptors with the same SHA256 digest in the same
- consensus. When clients receive a consensus like this, they only
- use one of the relays. Without this fix, a hostile relay could
- selectively disable some client use of target relays by
- constructing a router descriptor with a different identity and the
- same microdescriptor parameters and getting the authorities to
- list it in a microdescriptor consensus. This fix prevents an
- attacker from causing a microdescriptor collision, because the
- router's identity is not forgeable.
- o Major bugfixes (openssl bug workaround):
- - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
- 1.0.1j, built with the 'no-ssl3' configuration option. Fixes
- bug 13471. This is a workaround for an OpenSSL bug.
- o Major bugfixes (client):
- - Perform circuit cleanup operations even when circuit
- construction operations are disabled (because the network is
- disabled, or because there isn't enough directory information).
- Previously, when we were not building predictive circuits, we
- were not closing expired circuits either. Fixes bug 8387; bugfix on
- 0.1.1.11-alpha. This bug became visible in 0.2.4.10-alpha when we
- became more strict about when we have "enough directory information
- to build circuits".
- o Major bugfixes (client, pluggable transports):
- - When managing pluggable transports, use OS notification facilities
- to learn if they have crashed, and don't attempt to kill any
- process that has already exited. Fixes bug 8746; bugfix
- on 0.2.3.6-alpha.
- o Major bugfixes (relay denial of service):
- - Instead of writing destroy cells directly to outgoing connection
- buffers, queue them and intersperse them with other outgoing cells.
- This can prevent a set of resource starvation conditions where too
- many pending destroy cells prevent data cells from actually getting
- delivered. Reported by "oftc_must_be_destroyed". Fixes bug 7912;
- bugfix on 0.2.0.1-alpha.
- o Major bugfixes (relay):
- - Avoid queuing or sending destroy cells for circuit ID zero when we
- fail to send a CREATE cell. Fixes bug 12848; bugfix on 0.0.8pre1.
- Found and fixed by "cypherpunks".
- - Fix ORPort reachability detection on relays running behind a
- proxy, by correctly updating the "local" mark on the controlling
- channel when changing the address of an or_connection_t after the
- handshake. Fixes bug 12160; bugfix on 0.2.4.4-alpha.
- - Use a direct dirport connection when uploading non-anonymous
- descriptors to the directory authorities. Previously, relays would
- incorrectly use tunnel connections under a fairly wide variety of
- circumstances. Fixes bug 11469; bugfix on 0.2.4.3-alpha.
- - When a circuit accidentally has the same circuit ID for its
- forward and reverse direction, correctly detect the direction of
- cells using that circuit. Previously, this bug made roughly one
- circuit in a million non-functional. Fixes bug 12195; this is a
- bugfix on every version of Tor.
- o Minor features (security):
- - New --enable-expensive-hardening option to enable security
- hardening options that consume nontrivial amounts of CPU and
- memory. Right now, this includes AddressSanitizer and UbSan, which
- are supported in newer versions of GCC and Clang. Closes ticket
- 11477.
- - Authorities now assign the Guard flag to the fastest 25% of the
- network (it used to be the fastest 50%). Also raise the consensus
- weight that guarantees the Guard flag from 250 to 2000. For the
- current network, this results in about 1100 guards, down from 2500.
- This step paves the way for moving the number of entry guards
- down to 1 (proposal 236) while still providing reasonable expected
- performance for most users. Implements ticket 12690.
- o Minor features (security, memory management):
- - Memory allocation tricks (mempools and buffer freelists) are now
- disabled by default. You can turn them back on with
- --enable-mempools and --enable-buf-freelists respectively. We're
- disabling these features because malloc performance is good enough
- on most platforms, and a similar feature in OpenSSL exacerbated
- exploitation of the Heartbleed attack. Resolves ticket 11476.
- o Minor features (bridge client):
- - Report a more useful failure message when we can't connect to a
- bridge because we don't have the right pluggable transport
- configured. Resolves ticket 9665. Patch from Fábio J. Bertinatto.
- o Minor features (bridge):
- - Add an ExtORPortCookieAuthFileGroupReadable option to make the
- cookie file for the ExtORPort g+r by default.
- o Minor features (bridges, pluggable transports):
- - Bridges now write the SHA1 digest of their identity key
- fingerprint (that is, a hash of a hash of their public key) to
- notice-level logs, and to a new hashed-fingerprint file. This
- information will help bridge operators look up their bridge in
- Globe and similar tools. Resolves ticket 10884.
- - Improve the message that Tor displays when running as a bridge
- using pluggable transports without an Extended ORPort listener.
- Also, log the message in the log file too. Resolves ticket 11043.
- - Add threshold cutoffs to the networkstatus document created by
- the Bridge Authority. Fixes bug 1117.
- - On Windows, spawn background processes using the CREATE_NO_WINDOW
- flag. Now Tor Browser Bundle 3.5 with pluggable transports enabled
- doesn't pop up a blank console window. (In Tor Browser Bundle 2.x,
- Vidalia set this option for us.) Implements ticket 10297.
- o Minor features (build):
- - The configure script has a --disable-seccomp option to turn off
- support for libseccomp on systems that have it, in case it (or
- Tor's use of it) is broken. Resolves ticket 11628.
- - Assume that a user using ./configure --host wants to cross-compile,
- and give an error if we cannot find a properly named
- tool-chain. Add a --disable-tool-name-check option to proceed
- nevertheless. Addresses ticket 9869. Patch by Benedikt Gollatz.
- - If we run ./configure and the compiler recognizes -fstack-protector
- but the linker rejects it, warn the user about a potentially missing
- libssp package. Addresses ticket 9948. Patch from Benedikt Gollatz.
- - Add support for `--library-versions` flag. Implements ticket 6384.
- - Return the "unexpected sendme" warnings to a warn severity, but make
- them rate limited, to help diagnose ticket 8093.
- - Detect a missing asciidoc, and warn the user about it, during
- configure rather than at build time. Fixes issue 6506. Patch from
- Arlo Breault.
- o Minor features (client):
- - Add a new option, PredictedPortsRelevanceTime, to control how long
- after having received a request to connect to a given port Tor
- will try to keep circuits ready in anticipation of future requests
- for that port. Patch from "unixninja92"; implements ticket 9176.
- o Minor features (config options and command line):
- - Add an --allow-missing-torrc commandline option that tells Tor to
- run even if the configuration file specified by -f is not available.
- Implements ticket 10060.
- - Add support for the TPROXY transparent proxying facility on Linux.
- See documentation for the new TransProxyType option for more
- details. Implementation by "thomo". Closes ticket 10582.
- o Minor features (config options):
- - Config (torrc) lines now handle fingerprints which are missing
- their initial '$'. Resolves ticket 4341; improvement over 0.0.9pre5.
- - Support a --dump-config option to print some or all of the
- configured options. Mainly useful for debugging the command-line
- option parsing code. Helps resolve ticket 4647.
- - Raise awareness of safer logging: notify user of potentially
- unsafe config options, like logging more verbosely than severity
- "notice" or setting SafeLogging to 0. Resolves ticket 5584.
- - Add a new configuration option TestingV3AuthVotingStartOffset
- that bootstraps a network faster by changing the timing for
- consensus votes. Addresses ticket 8532.
- - Add a new torrc option "ServerTransportOptions" that allows
- bridge operators to pass configuration parameters to their
- pluggable transports. Resolves ticket 8929.
- - The config (torrc) file now accepts bandwidth and space limits in
- bits as well as bytes. (Anywhere that you can say "2 Kilobytes",
- you can now say "16 kilobits", and so on.) Resolves ticket 9214.
- Patch by CharlieB.
- o Minor features (controller):
- - Make the entire exit policy available from the control port via
- GETINFO exit-policy
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