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diff --git a/ReleaseNotes b/ReleaseNotes index ba5de30c01..b64696ba96 100644 --- a/ReleaseNotes +++ b/ReleaseNotes @@ -2,6 +2,1091 @@ 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 0.2.8.17 - 2017-12-01 + Tor 0.2.8.17 backports important security and stability bugfixes from + later Tor releases. All Tor users should upgrade to this release, or + to another of the releases coming out today. + + Note: the Tor 0.2.8 series will no longer be supported after 1 Jan + 2018. If you need a release with long-term support, please upgrade with + the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later. + + o Major bugfixes (security, backport from 0.3.2.6-alpha): + - Fix a denial of service bug where an attacker could use a + malformed directory object to cause a Tor instance to pause while + OpenSSL would try to read a passphrase from the terminal. (Tor + instances run without a terminal, which is the case for most Tor + packages, are not impacted.) Fixes bug 24246; bugfix on every + version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821. + Found by OSS-Fuzz as testcase 6360145429790720. + - When checking for replays in the INTRODUCE1 cell data for a + (legacy) onion service, correctly detect replays in the RSA- + encrypted part of the cell. We were previously checking for + replays on the entire cell, but those can be circumvented due to + the malleability of Tor's legacy hybrid encryption. This fix helps + prevent a traffic confirmation attack. Fixes bug 24244; bugfix on + 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009 + and CVE-2017-8819. + + o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha): + - Fix a use-after-free error that could crash v2 Tor onion services + when they failed to open circuits while expiring introduction + points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is + also tracked as TROVE-2017-013 and CVE-2017-8823. + + o Major bugfixes (security, relay, backport from 0.3.2.6-alpha): + - When running as a relay, make sure that we never build a path through + ourselves, even in the case where we have somehow lost the version of + our descriptor appearing in the consensus. Fixes part of bug 21534; + bugfix on 0.2.0.1-alpha. This issue is also tracked as TROVE-2017-012 + and CVE-2017-8822. + + o Minor features (bridge, backport from 0.3.1.9): + - Bridges now include notice in their descriptors that they are + bridges, and notice of their distribution status, based on their + publication settings. Implements ticket 18329. For more fine- + grained control of how a bridge is distributed, upgrade to 0.3.2.x + or later. + + o Minor features (directory authority, backport from 0.3.2.6-alpha): + - Add an IPv6 address for the "bastet" directory authority. Closes + ticket 24394. + + o Minor features (geoip): + - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2 + Country database. + + o Minor bugfixes (testing, backport from 0.3.1.6-rc): + - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291; + bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij. + + +Changes in version 0.2.8.16 - 2017-10-25 + Tor 0.2.8.16 backports a collection of bugfixes from later Tor release + series, including a bugfix for a crash issue that had affected relays + under memory pressure. It also adds a new directory authority, Bastet. + + Note: the Tor 0.2.8 series will no longer be supported after 1 Jan + 2018. If you need a release with long-term support, please stick with + the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later. + + o Directory authority changes: + - Add "Bastet" as a ninth directory authority to the default list. + Closes ticket 23910. + - The directory authority "Longclaw" has changed its IP address. + Closes ticket 23592. + + o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha): + - Fix a timing-based assertion failure that could occur when the + circuit out-of-memory handler freed a connection's output buffer. + Fixes bug 23690; bugfix on 0.2.6.1-alpha. + + o Minor features (directory authorities, backport from 0.3.2.2-alpha): + - Remove longclaw's IPv6 address, as it will soon change. Authority + IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves + 3/8 directory authorities with IPv6 addresses, but there are also + 52 fallback directory mirrors with IPv6 addresses. Resolves 19760. + + o Minor features (geoip): + - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2 + Country database. + + +Changes in version 0.2.8.15 - 2017-09-18 + Tor 0.2.8.15 backports a collection of bugfixes from later + Tor series. + + Most significantly, it includes a fix for TROVE-2017-008, a + security bug that affects hidden services running with the + SafeLogging option disabled. For more information, see + https://trac.torproject.org/projects/tor/ticket/23490 + + Note that Tor 0.2.8.x will no longer be supported after 1 Jan + 2018. We suggest that you upgrade to the latest stable release if + possible. If you can't, we recommend that you upgrade at least to + 0.2.9, which will be supported until 2020. + + o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha): + - Avoid an assertion failure bug affecting our implementation of + inet_pton(AF_INET6) on certain OpenBSD systems whose strtol() + handling of "0xx" differs from what we had expected. Fixes bug + 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007. + + o Minor features: + - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2 + Country database. + + o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha): + - Backport a fix for an "unused variable" warning that appeared + in some versions of mingw. Fixes bug 22838; bugfix on + 0.2.8.1-alpha. + + o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha): + - Fix a memset() off the end of an array when packing cells. This + bug should be harmless in practice, since the corrupted bytes are + still in the same structure, and are always padding bytes, + ignored, or immediately overwritten, depending on compiler + behavior. Nevertheless, because the memset()'s purpose is to make + sure that any other cell-handling bugs can't expose bytes to the + network, we need to fix it. Fixes bug 22737; bugfix on + 0.2.4.11-alpha. Fixes CID 1401591. + + o Build features (backport from 0.3.1.5-alpha): + - Tor's repository now includes a Travis Continuous Integration (CI) + configuration file (.travis.yml). This is meant to help new + developers and contributors who fork Tor to a Github repository be + better able to test their changes, and understand what we expect + to pass. To use this new build feature, you must fork Tor to your + Github account, then go into the "Integrations" menu in the + repository settings for your fork and enable Travis, then push + your changes. Closes ticket 22636. + + +Changes in version 0.2.8.14 - 2017-06-08 + Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to + remotely crash a hidden service with an assertion failure. Anyone + running a hidden service should upgrade to this version, or to some + other version with fixes for TROVE-2017-005. (Versions before 0.3.0 + are not affected by TROVE-2017-004.) + + o Major bugfixes (hidden service, relay, security): + - Fix a remotely triggerable assertion failure caused by receiving a + BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug + 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix + on 0.2.2.1-alpha. + + o Minor features (geoip): + - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2 + Country database. + + o Minor features (fallback directory list, backport from 0.3.1.3-alpha): + - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in + December 2016 (of which ~126 were still functional) with a list of + 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May + 2017. Resolves ticket 21564. + + o Minor bugfixes (correctness): + - Avoid undefined behavior when parsing IPv6 entries from the geoip6 + file. Fixes bug 22490; bugfix on 0.2.4.6-alpha. + + +Changes in version 0.2.8.13 - 2017-03-03 + Tor 0.2.8.13 backports a security fix from later Tor + releases. Anybody running Tor 0.2.8.12 or earlier should upgrade to this + this release, if for some reason they cannot upgrade to a later + release series, and if they build Tor with the --enable-expensive-hardening + option. + + Note that support for Tor 0.2.8.x is ending next year: we will not issue + any fixes for the Tor 0.2.8.x series after 1 Jan 2018. If you need + a Tor release series with longer-term support, we recommend Tor 0.2.9.x. + + o Major bugfixes (parsing, backported from 0.3.0.4-rc): + - Fix an integer underflow bug when comparing malformed Tor + versions. This bug could crash Tor when built with + --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor + 0.2.9.8, which were built with -ftrapv by default. In other cases + it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix + on 0.0.8pre1. Found by OSS-Fuzz. + + o Minor features (geoip): + - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2 + Country database. + + +Changes in version 0.2.8.12 - 2016-12-19 + Tor 0.2.8.12 backports a fix for a medium-severity issue (bug 21018 + below) where Tor clients could crash when attempting to visit a + hostile hidden service. Clients are recommended to upgrade as packages + become available for their systems. + + It also includes an updated list of fallback directories, backported + from 0.2.9. + + Now that the Tor 0.2.9 series is stable, only major bugfixes will be + backported to 0.2.8 in the future. + + o Major bugfixes (parsing, security, backported from 0.2.9.8): + - Fix a bug in parsing that could cause clients to read a single + byte past the end of an allocated region. This bug could be used + to cause hardened clients (built with --enable-expensive-hardening) + to crash if they tried to visit a hostile hidden service. Non- + hardened clients are only affected depending on the details of + their platform's memory allocator. Fixes bug 21018; bugfix on + 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE- + 2016-12-002 and as CVE-2016-1254. + + o Minor features (fallback directory list, backported from 0.2.9.8): + - Replace the 81 remaining fallbacks of the 100 originally + introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177 + fallbacks (123 new, 54 existing, 27 removed) generated in December + 2016. Resolves ticket 20170. + + o Minor features (geoip, backported from 0.2.9.7-rc): + - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2 + Country database. + + +Changes in version 0.2.8.11 - 2016-12-08 + Tor 0.2.8.11 backports fixes for additional portability issues that + could prevent Tor from building correctly on OSX Sierra, or with + OpenSSL 1.1. Affected users should upgrade; others can safely stay + with 0.2.8.10. + + o Minor bugfixes (portability): + - Avoid compilation errors when building on OSX Sierra. Sierra began + to support the getentropy() and clock_gettime() APIs, but created + a few problems in doing so. Tor 0.2.9 has a more thorough set of + workarounds; in 0.2.8, we are just using the /dev/urandom and mach + monotonic time interfaces. Fixes bug 20865. Bugfix + on 0.2.8.1-alpha. + + o Minor bugfixes (portability, backport from 0.2.9.5-alpha): + - Fix compilation with OpenSSL 1.1 and less commonly-used CPU + architectures. Closes ticket 20588. + + +Changes in version 0.2.8.10 - 2016-12-02 + Tor 0.2.8.10 backports a fix for a bug that would sometimes make clients + unusable after they left standby mode. It also backports fixes for + a few portability issues and a small but problematic memory leak. + + o Major bugfixes (client reliability, backport from 0.2.9.5-alpha): + - When Tor leaves standby because of a new application request, open + circuits as needed to serve that request. Previously, we would + potentially wait a very long time. Fixes part of bug 19969; bugfix + on 0.2.8.1-alpha. + + o Major bugfixes (client performance, backport from 0.2.9.5-alpha): + - Clients now respond to new application stream requests immediately + when they arrive, rather than waiting up to one second before + starting to handle them. Fixes part of bug 19969; bugfix + on 0.2.8.1-alpha. + + o Minor bugfixes (portability, backport from 0.2.9.6-rc): + - Work around a bug in the OSX 10.12 SDK that would prevent us from + successfully targeting earlier versions of OSX. Resolves + ticket 20235. + + o Minor bugfixes (portability, backport from 0.2.9.5-alpha): + - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug + 20551; bugfix on 0.2.1.1-alpha. + + o Minor bugfixes (relay, backport from 0.2.9.5-alpha): + - Work around a memory leak in OpenSSL 1.1 when encoding public + keys. Fixes bug 20553; bugfix on 0.0.2pre8. + + o Minor features (geoip): + - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2 + Country database. + + +Changes in version 0.2.8.9 - 2016-10-17 + Tor 0.2.8.9 backports a fix for a security hole in previous versions + of Tor that would allow a remote attacker to crash a Tor client, + hidden service, relay, or authority. All Tor users should upgrade to + this version, or to 0.2.9.4-alpha. Patches will be released for older + versions of Tor. + + o Major features (security fixes, also in 0.2.9.4-alpha): + - Prevent a class of security bugs caused by treating the contents + of a buffer chunk as if they were a NUL-terminated string. At + least one such bug seems to be present in all currently used + versions of Tor, and would allow an attacker to remotely crash + most Tor instances, especially those compiled with extra compiler + hardening. With this defense in place, such bugs can't crash Tor, + though we should still fix them as they occur. Closes ticket + 20384 (TROVE-2016-10-001). + + o Minor features (geoip): + - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2 + Country database. + + +Changes in version 0.2.8.8 - 2016-09-23 + Tor 0.2.8.8 fixes two crash bugs present in previous versions of the + 0.2.8.x series. Relays running 0.2.8.x should upgrade, as should users + who select public relays as their bridges. + + o Major bugfixes (crash): + - Fix a complicated crash bug that could affect Tor clients + configured to use bridges when replacing a networkstatus consensus + in which one of their bridges was mentioned. OpenBSD users saw + more crashes here, but all platforms were potentially affected. + Fixes bug 20103; bugfix on 0.2.8.2-alpha. + + o Major bugfixes (relay, OOM handler): + - Fix a timing-dependent assertion failure that could occur when we + tried to flush from a circuit after having freed its cells because + of an out-of-memory condition. Fixes bug 20203; bugfix on + 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing + this one. + + o Minor feature (fallback directories): + - Remove broken fallbacks from the hard-coded fallback directory + list. Closes ticket 20190; patch by teor. + + o Minor features (geoip): + - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2 + Country database. + +Changes in version 0.2.8.7 - 2016-08-24 + Tor 0.2.8.7 fixes an important bug related to the ReachableAddresses + option in 0.2.8.6, and replaces a retiring bridge authority. Everyone + who sets the ReachableAddresses option, and all bridges, are strongly + encouraged to upgrade. + + o Directory authority changes: + - The "Tonga" bridge authority has been retired; the new bridge + authority is "Bifroest". Closes tickets 19728 and 19690. + + o Major bugfixes (client, security): + - Only use the ReachableAddresses option to restrict the first hop + in a path. In earlier versions of 0.2.8.x, it would apply to + every hop in the path, with a possible degradation in anonymity + for anyone using an uncommon ReachableAddress setting. Fixes bug + 19973; bugfix on 0.2.8.2-alpha. + + o Minor features (geoip): + - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2 + Country database. + + o Minor bugfixes (compilation): + - Remove an inappropriate "inline" in tortls.c that was causing + warnings on older versions of GCC. Fixes bug 19903; bugfix + on 0.2.8.1-alpha. + + o Minor bugfixes (fallback directories): + - Avoid logging a NULL string pointer when loading fallback + directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha + and 0.2.8.1-alpha. Report and patch by "rubiate". + + +Changes in version 0.2.8.6 - 2016-08-02 + + Tor 0.2.8.6 is the first stable version of the Tor 0.2.8 series. + + The Tor 0.2.8 series improves client bootstrapping performance, + completes the authority-side implementation of improved identity + keys for relays, and includes numerous bugfixes and performance + improvements throughout the program. This release continues to + improve the coverage of Tor's test suite. For a full list of + changes since Tor 0.2.7, see the ReleaseNotes file. + + Below is a list of the changes since Tor 0.2.7. + + o New system requirements: + - Tor no longer attempts to support platforms where the "time_t" + type is unsigned. (To the best of our knowledge, only OpenVMS does + this, and Tor has never actually built on OpenVMS.) Closes + ticket 18184. + - Tor no longer supports versions of OpenSSL with a broken + implementation of counter mode. (This bug was present in OpenSSL + 1.0.0, and was fixed in OpenSSL 1.0.0a.) Tor still detects, but no + longer runs with, these versions. + - Tor now uses Autoconf version 2.63 or later, and Automake 1.11 or + later (released in 2008 and 2009 respectively). If you are + building Tor from the git repository instead of from the source + distribution, and your tools are older than this, you will need to + upgrade. Closes ticket 17732. + + o Directory authority changes: + - Update the V3 identity key for the dannenberg directory authority: + it was changed on 18 November 2015. Closes task 17906. Patch + by teor. + - Urras is no longer a directory authority. Closes ticket 19271. + + o Major features (directory system): + - Include a trial list of default fallback directories, based on an + opt-in survey of suitable relays. Doing this should make clients + bootstrap more quickly and reliably, and reduce the load on the + directory authorities. Closes ticket 15775. Patch by teor. + Candidates identified using an OnionOO script by weasel, teor, + gsathya, and karsten. + - Previously only relays that explicitly opened a directory port + (DirPort) accepted directory requests from clients. Now all + relays, with and without a DirPort, accept and serve tunneled + directory requests that they receive through their ORPort. You can + disable this behavior using the new DirCache option. Closes + ticket 12538. + - When bootstrapping multiple consensus downloads at a time, use the + first one that starts downloading, and close the rest. This + reduces failures when authorities or fallback directories are slow + or down. Together with the code for feature 15775, this feature + should reduces failures due to fallback churn. Implements ticket + 4483. Patch by teor. Implements IPv4 portions of proposal 210 by + mikeperry and teor. + + o Major features (security, Linux): + - When Tor starts as root on Linux and is told to switch user ID, it + can now retain the capability to bind to low ports. By default, + Tor will do this only when it's switching user ID and some low + ports have been configured. You can change this behavior with the + new option KeepBindCapabilities. Closes ticket 8195. + + o Major bugfixes (client, bootstrapping): + - Check if bootstrap consensus downloads are still needed when the + linked connection attaches. This prevents tor making unnecessary + begindir-style connections, which are the only directory + connections tor clients make since the fix for 18483 was merged. + - Fix some edge cases where consensus download connections may not + have been closed, even though they were not needed. Related to fix + for 18809. + - Make relays retry consensus downloads the correct number of times, + rather than the more aggressive client retry count. Fixes part of + ticket 18809. + + o Major bugfixes (dns proxy mode, crash): + - Avoid crashing when running as a DNS proxy. Fixes bug 16248; + bugfix on 0.2.0.1-alpha. Patch from "cypherpunks". + + o Major bugfixes (ed25519, voting): + - Actually enable support for authorities to match routers by their + Ed25519 identities. Previously, the code had been written, but + some debugging code that had accidentally been left in the + codebase made it stay turned off. Fixes bug 17702; bugfix + on 0.2.7.2-alpha. + - When collating votes by Ed25519 identities, authorities now + include a "NoEdConsensus" flag if the ed25519 value (or lack + thereof) for a server does not reflect the majority consensus. + Related to bug 17668; bugfix on 0.2.7.2-alpha. + - When generating a vote with keypinning disabled, never include two + entries for the same ed25519 identity. This bug was causing + authorities to generate votes that they could not parse when a + router violated key pinning by changing its RSA identity but + keeping its Ed25519 identity. Fixes bug 17668; fixes part of bug + 18318. Bugfix on 0.2.7.2-alpha. + + o Major bugfixes (key management): + - If OpenSSL fails to generate an RSA key, do not retain a dangling + pointer to the previous (uninitialized) key value. The impact here + should be limited to a difficult-to-trigger crash, if OpenSSL is + running an engine that makes key generation failures possible, or + if OpenSSL runs out of memory. Fixes bug 19152; bugfix on + 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and + Baishakhi Ray. + + o Major bugfixes (security, client, DNS proxy): + - Stop a crash that could occur when a client running with DNSPort + received a query with multiple address types, and the first + address type was not supported. Found and fixed by Scott Dial. + Fixes bug 18710; bugfix on 0.2.5.4-alpha. + + o Major bugfixes (security, compilation): + - Correctly detect compiler flags on systems where _FORTIFY_SOURCE + is predefined. Previously, our use of -D_FORTIFY_SOURCE would + cause a compiler warning, thereby making other checks fail, and + needlessly disabling compiler-hardening support. Fixes one case of + bug 18841; bugfix on 0.2.3.17-beta. Patch from "trudokal". + - Repair hardened builds under the clang compiler. Previously, our + use of _FORTIFY_SOURCE would conflict with clang's address + sanitizer. Fixes bug 14821; bugfix on 0.2.5.4-alpha. + + o Major bugfixes (security, pointers): + - Avoid a difficult-to-trigger heap corruption attack when extending + a smartlist to contain over 16GB of pointers. Fixes bug 18162; + bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely. + Reported by Guido Vranken. + + o Major bugfixes (testing): + - Fix a bug that would block 'make test-network-all' on systems where + IPv6 packets were lost. Fixes bug 19008; bugfix on 0.2.7.3-rc. + + o Major bugfixes (user interface): + - Correctly give a warning in the cases where a relay is specified + by nickname, and one such relay is found, but it is not officially + Named. Fixes bug 19203; bugfix on 0.2.3.1-alpha. + + o Minor features (accounting): + - Added two modes to the AccountingRule option: One for limiting + only the number of bytes sent ("AccountingRule out"), and one for + limiting only the number of bytes received ("AccountingRule in"). + Closes ticket 15989; patch from "unixninja92". + + o Minor features (bug-resistance): + - Make Tor survive errors involving connections without a + corresponding event object. Previously we'd fail with an + assertion; now we produce a log message. Related to bug 16248. + - Use tor_snprintf() and tor_vsnprintf() even in external and low- + level code, to harden against accidental failures to NUL- + terminate. Part of ticket 17852. Patch from jsturgix. Found + with Flawfinder. + + o Minor features (build): + - Detect systems with FreeBSD-derived kernels (such as GNU/kFreeBSD) + as having possible IPFW support. Closes ticket 18448. Patch from + Steven Chamberlain. + - Since our build process now uses "make distcheck", we no longer + force "make dist" to depend on "make check". Closes ticket 17893; + patch from "cypherpunks". + - Tor now builds once again with the recent OpenSSL 1.1 development + branch (tested against 1.1.0-pre5 and 1.1.0-pre6-dev). We have been + tracking OpenSSL 1.1 development as it has progressed, and fixing + numerous compatibility issues as they arose. See tickets + 17549, 17921, 17984, 19499, and 18286. + - When building manual pages, set the timezone to "UTC", so that the + output is reproducible. Fixes bug 19558; bugfix on 0.2.2.9-alpha. + Patch from intrigeri. + + o Minor features (clients): + - Make clients, onion services, and bridge relays always use an + encrypted begindir connection for directory requests. Resolves + ticket 18483. Patch by teor. + + o Minor features (controller): + - Add 'GETINFO exit-policy/reject-private/[default,relay]', so + controllers can examine the the reject rules added by + ExitPolicyRejectPrivate. This makes it easier for stem to display + exit policies. + - Adds the FallbackDir entries to 'GETINFO config/defaults'. Closes + tickets 16774 and 17817. Patch by George Tankersley. + - New 'GETINFO hs/service/desc/id/' command to retrieve a hidden + service descriptor from a service's local hidden service + descriptor cache. Closes ticket 14846. + + o Minor features (crypto): + - Add SHA3 and SHAKE support to crypto.c. Closes ticket 17783. + - Add SHA512 support to crypto.c. Closes ticket 17663; patch from + George Tankersley. + - Improve performance when hashing non-multiple of 8 sized buffers, + based on Andrew Moon's public domain SipHash-2-4 implementation. + Fixes bug 17544; bugfix on 0.2.5.3-alpha. + - Validate the hard-coded Diffie-Hellman parameters and ensure that + p is a safe prime, and g is a suitable generator. Closes + ticket 18221. + - When allocating a digest state object, allocate no more space than + we actually need. Previously, we would allocate as much space as + the state for the largest algorithm would need. This change saves + up to 672 bytes per circuit. Closes ticket 17796. + + o Minor features (directory downloads): + - Add UseDefaultFallbackDirs, which enables any hard-coded fallback + directory mirrors. The default is 1; set it to 0 to disable + fallbacks. Implements ticket 17576. Patch by teor. + - Wait for busy authorities and fallback directories to become non- + busy when bootstrapping. (A similar change was made in 6c443e987d + for directory caches chosen from the consensus.) Closes ticket + 17864; patch by teor. + + o Minor features (geoip): + - Update geoip and geoip6 to the July 6 2016 Maxmind GeoLite2 + Country database. + + o Minor features (hidden service directory): + - Streamline relay-side hsdir handling: when relays consider whether + to accept an uploaded hidden service descriptor, they no longer + check whether they are one of the relays in the network that is + "supposed" to handle that descriptor. Implements ticket 18332. + + o Minor features (IPv6): + - Add ClientPreferIPv6DirPort, which is set to 0 by default. If set + to 1, tor prefers IPv6 directory addresses. + - Add ClientUseIPv4, which is set to 1 by default. If set to 0, tor + avoids using IPv4 for client OR and directory connections. + - Add address policy assume_action support for IPv6 addresses. + - Add an argument 'ipv6=address:orport' to the DirAuthority and + FallbackDir torrc options, to specify an IPv6 address for an + authority or fallback directory. Add hard-coded ipv6 addresses for + directory authorities that have them. Closes ticket 17327; patch + from Nick Mathewson and teor. + - Allow users to configure directory authorities and fallback + directory servers with IPv6 addresses and ORPorts. Resolves + ticket 6027. + - Limit IPv6 mask bits to 128. + - Make tor_ersatz_socketpair work on IPv6-only systems. Fixes bug + 17638; bugfix on 0.0.2pre8. Patch by teor. + - Try harder to obey the IP version restrictions "ClientUseIPv4 0", + "ClientUseIPv6 0", "ClientPreferIPv6ORPort", and + "ClientPreferIPv6DirPort". Closes ticket 17840; patch by teor. + - Warn when comparing against an AF_UNSPEC address in a policy, it's + almost always a bug. Closes ticket 17863; patch by teor. + - routerset_parse now accepts IPv6 literal addresses. Fixes bug + 17060; bugfix on 0.2.1.3-alpha. Patch by teor. + + o Minor features (Linux seccomp2 sandbox): + - Reject attempts to change our Address with "Sandbox 1" enabled. + Changing Address with Sandbox turned on would never actually work, + but previously it would fail in strange and confusing ways. Found + while fixing 18548. + + o Minor features (logging): + - When logging to syslog, allow a tag to be added to the syslog + identity (the string prepended to every log message). The tag can + be configured with SyslogIdentityTag and defaults to none. Setting + it to "foo" will cause logs to be tagged as "Tor-foo". Closes + ticket 17194. + + o Minor features (portability): + - Use timingsafe_memcmp() where available. Closes ticket 17944; + patch from <logan@hackers.mu>. + + o Minor features (relay, address discovery): + - Add a family argument to get_interface_addresses_raw() and + subfunctions to make network interface address interogation more + efficient. Now Tor can specifically ask for IPv4, IPv6 or both + types of interfaces from the operating system. Resolves + ticket 17950. + - When get_interface_address6_list(.,AF_UNSPEC,.) is called and + fails to enumerate interface addresses using the platform-specific + API, have it rely on the UDP socket fallback technique to try and + find out what IP addresses (both IPv4 and IPv6) our machine has. + Resolves ticket 17951. + + o Minor features (replay cache): + - The replay cache now uses SHA256 instead of SHA1. Implements + feature 8961. Patch by teor, issue reported by rransom. + + o Minor features (robustness): + - Exit immediately with an error message if the code attempts to use + Libevent without having initialized it. This should resolve some + frequently-made mistakes in our unit tests. Closes ticket 18241. + + o Minor features (security, clock): + - Warn when the system clock appears to move back in time (when the + state file was last written in the future). Tor doesn't know that + consensuses have expired if the clock is in the past. Patch by + teor. Implements ticket 17188. + + o Minor features (security, exit policies): + - ExitPolicyRejectPrivate now rejects more private addresses by + default. Specifically, it now rejects the relay's outbound bind + addresses (if configured), and the relay's configured port + addresses (such as ORPort and DirPort). Fixes bug 17027; bugfix on + 0.2.0.11-alpha. Patch by teor. + + o Minor features (security, memory erasure): + - Make memwipe() do nothing when passed a NULL pointer or buffer of + zero size. Check size argument to memwipe() for underflow. Fixes + bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk", + patch by teor. + - Set the unused entries in a smartlist to NULL. This helped catch + a (harmless) bug, and shouldn't affect performance too much. + Implements ticket 17026. + - Use SecureMemoryWipe() function to securely clean memory on + Windows. Previously we'd use OpenSSL's OPENSSL_cleanse() function. + Implements feature 17986. + - Use explicit_bzero or memset_s when present. Previously, we'd use + OpenSSL's OPENSSL_cleanse() function. Closes ticket 7419; patches + from <logan@hackers.mu> and <selven@hackers.mu>. + + o Minor features (security, RNG): + - Adjust Tor's use of OpenSSL's RNG APIs so that they absolutely, + positively are not allowed to fail. Previously we depended on + internal details of OpenSSL's behavior. Closes ticket 17686. + - Never use the system entropy output directly for anything besides + seeding the PRNG. When we want to generate important keys, instead + of using system entropy directly, we now hash it with the PRNG + stream. This may help resist certain attacks based on broken OS + entropy implementations. Closes part of ticket 17694. + - Use modern system calls (like getentropy() or getrandom()) to + generate strong entropy on platforms that have them. Closes + ticket 13696. + + o Minor features (security, win32): + - Set SO_EXCLUSIVEADDRUSE on Win32 to avoid a local port-stealing + attack. Fixes bug 18123; bugfix on all tor versions. Patch + by teor. + + o Minor features (unix domain sockets): + - Add a new per-socket option, RelaxDirModeCheck, to allow creating + Unix domain sockets without checking the permissions on the parent + directory. (Tor checks permissions by default because some + operating systems only check permissions on the parent directory. + However, some operating systems do look at permissions on the + socket, and tor's default check is unneeded.) Closes ticket 18458. + Patch by weasel. + + o Minor features (unix file permissions): + - Defer creation of Unix sockets until after setuid. This avoids + needing CAP_CHOWN and CAP_FOWNER when using systemd's + CapabilityBoundingSet, or chown and fowner when using SELinux. + Implements part of ticket 17562. Patch from Jamie Nguyen. + - If any directory created by Tor is marked as group readable, the + filesystem group is allowed to be either the default GID or the + root user. Allowing root to read the DataDirectory prevents the + need for CAP_READ_SEARCH when using systemd's + CapabilityBoundingSet, or dac_read_search when using SELinux. + Implements part of ticket 17562. Patch from Jamie Nguyen. + - Introduce a new DataDirectoryGroupReadable option. If it is set to + 1, the DataDirectory will be made readable by the default GID. + Implements part of ticket 17562. Patch from Jamie Nguyen. + + o Minor bugfixes (accounting): + - The max bandwidth when using 'AccountRule sum' is now correctly + logged. Fixes bug 18024; bugfix on 0.2.6.1-alpha. Patch + from "unixninja92". + + o Minor bugfixes (assert, portability): + - Fix an assertion failure in memarea.c on systems where "long" is + shorter than the size of a pointer. Fixes bug 18716; bugfix + on 0.2.1.1-alpha. + + o Minor bugfixes (bootstrap): + - Consistently use the consensus download schedule for authority + certificates. Fixes bug 18816; bugfix on 0.2.4.13-alpha. + + o Minor bugfixes (build): + - Avoid spurious failures from configure files related to calling + exit(0) in TOR_SEARCH_LIBRARY. Fixes bug 18625; bugfix on + 0.2.0.1-alpha. Patch from "cypherpunks". + - Do not link the unit tests against both the testing and non- + testing versions of the static libraries. Fixes bug 18490; bugfix + on 0.2.7.1-alpha. + - Resolve warnings when building on systems that are concerned with + signed char. Fixes bug 18728; bugfix on 0.2.7.2-alpha + and 0.2.6.1-alpha. + - Silence spurious clang-scan warnings in the ed25519_donna code by + explicitly initializing some objects. Fixes bug 18384; bugfix on + 0.2.7.2-alpha. Patch by teor. + - When libscrypt.h is found, but no libscrypt library can be linked, + treat libscrypt as absent. Fixes bug 19161; bugfix + on 0.2.6.1-alpha. + - Cause the unit tests to compile correctly on mingw64 versions that + lack sscanf. Fixes bug 19213; bugfix on 0.2.7.1-alpha. + - Don't try to use the pthread_condattr_setclock() function unless + it actually exists. Fixes compilation on NetBSD-6.x. Fixes bug + 17819; bugfix on 0.2.6.3-alpha. + - Fix backtrace compilation on FreeBSD. Fixes bug 17827; bugfix + on 0.2.5.2-alpha. + - Fix search for libevent libraries on OpenBSD (and other systems + that install libevent 1 and libevent 2 in parallel). Fixes bug + 16651; bugfix on 0.1.0.7-rc. Patch from "rubiate". + - Isolate environment variables meant for tests from the rest of the + build system. Fixes bug 17818; bugfix on 0.2.7.3-rc. + - Mark all object files that include micro-revision.i as depending + on it, so as to make parallel builds more reliable. Fixes bug + 17826; bugfix on 0.2.5.1-alpha. + - Remove config.log only from make distclean, not from make clean. + Fixes bug 17924; bugfix on 0.2.4.1-alpha. + - Replace usage of 'INLINE' with 'inline'. Fixes bug 17804; bugfix + on 0.0.2pre8. + - Remove an #endif from configure.ac so that we correctly detect the + presence of in6_addr.s6_addr32. Fixes bug 17923; bugfix + on 0.2.0.13-alpha. + + o Minor bugfixes (client, bootstrap): + - Count receipt of new microdescriptors as progress towards + bootstrapping. Previously, with EntryNodes set, Tor might not + successfully repopulate the guard set on bootstrapping. Fixes bug + 16825; bugfix on 0.2.3.1-alpha. + + o Minor bugfixes (code correctness): + - Fix a bad memory handling bug that would occur if we had queued a + cell on a channel's incoming queue. Fortunately, we can't actually + queue a cell like that as our code is constructed today, but it's + best to avoid this kind of error, even if there isn't any code + that triggers it today. Fixes bug 18570; bugfix on 0.2.4.4-alpha. + - Assert that allocated memory held by the reputation code is freed + according to its internal counters. Fixes bug 17753; bugfix + on 0.1.1.1-alpha. + - Assert when the TLS contexts fail to initialize. Fixes bug 17683; + bugfix on 0.0.6. + - Update to the latest version of Trunnel, which tries harder to + avoid generating code that can invoke memcpy(p,NULL,0). Bug found + by clang address sanitizer. Fixes bug 18373; bugfix + on 0.2.7.2-alpha. + - When closing an entry connection, generate a warning if we should + have sent an end cell for it but we haven't. Fixes bug 17876; + bugfix on 0.2.3.2-alpha. + + o Minor bugfixes (configuration): + - Fix a tiny memory leak when parsing a port configuration ending in + ":auto". Fixes bug 18374; bugfix on 0.2.3.3-alpha. + + o Minor bugfixes (containers): + - If we somehow attempt to construct a heap with more than + 1073741822 elements, avoid an integer overflow when maintaining + the heap property. Fixes bug 18296; bugfix on 0.1.2.1-alpha. + + o Minor bugfixes (controller, microdescriptors): + - Make GETINFO dir/status-vote/current/consensus conform to the + control specification by returning "551 Could not open cached + consensus..." when not caching consensuses. Fixes bug 18920; + bugfix on 0.2.2.6-alpha. + + o Minor bugfixes (crypto): + - Check the return value of HMAC() and assert on failure. Fixes bug + 17658; bugfix on 0.2.3.6-alpha. Patch by teor. + + o Minor bugfixes (directories): + - When fetching extrainfo documents, compare their SHA256 digests + and Ed25519 signing key certificates with the routerinfo that led + us to fetch them, rather than with the most recent routerinfo. + Otherwise we generate many spurious warnings about mismatches. + Fixes bug 17150; bugfix on 0.2.7.2-alpha. + - When generating a URL for a directory server on an IPv6 address, + wrap the IPv6 address in square brackets. Fixes bug 18051; bugfix + on 0.2.3.9-alpha. Patch from Malek. + + o Minor bugfixes (downloading): + - Predict more correctly whether we'll be downloading over HTTP when + we determine the maximum length of a URL. This should avoid a + "BUG" warning about the Squid HTTP proxy and its URL limits. Fixes + bug 19191. + + o Minor bugfixes (exit policies, security): + - Refresh an exit relay's exit policy when interface addresses + change. Previously, tor only refreshed the exit policy when the + configured external address changed. Fixes bug 18208; bugfix on + 0.2.7.3-rc. Patch by teor. + + o Minor bugfixes (fallback directories): + - Mark fallbacks as "too busy" when they return a 503 response, + rather than just marking authorities. Fixes bug 17572; bugfix on + 0.2.4.7-alpha. Patch by teor. + - When requesting extrainfo descriptors from a trusted directory + server, check whether it is an authority or a fallback directory + which supports extrainfo descriptors. Fixes bug 18489; bugfix on + 0.2.4.7-alpha. Reported by atagar, patch by teor. + + o Minor bugfixes (hidden service, client): + - Handle the case where the user makes several fast consecutive + requests to the same .onion address. Previously, the first six + requests would each trigger a descriptor fetch, each picking a + directory (there are 6 overall) and the seventh one would fail + because no directories were left, thereby triggering a close on + all current directory connections asking for the hidden service. + The solution here is to not close the connections if we have + pending directory fetches. Fixes bug 15937; bugfix + on 0.2.7.1-alpha. + + o Minor bugfixes (hidden service, control port): + - Add the onion address to the HS_DESC event for the UPLOADED action + both on success or failure. It was previously hardcoded with + UNKNOWN. Fixes bug 16023; bugfix on 0.2.7.2-alpha. + + o Minor bugfixes (hidden service, directory): + - Bridges now refuse "rendezvous2" (hidden service descriptor) + publish attempts. Suggested by ticket 18332. + + o Minor bugfixes (IPv6): + - Update the limits in max_dl_per_request for IPv6 address length. + Fixes bug 17573; bugfix on 0.2.1.5-alpha. + + o Minor bugfixes (Linux seccomp2 sandbox): + - Allow more syscalls when running with "Sandbox 1" enabled: + sysinfo, getsockopt(SO_SNDBUF), and setsockopt(SO_SNDBUFFORCE). On + some systems, these are required for Tor to start. Fixes bug + 18397; bugfix on 0.2.5.1-alpha. Patch from Daniel Pinto. + - Allow IPPROTO_UDP datagram sockets when running with "Sandbox 1", + so that get_interface_address6_via_udp_socket_hack() can work. + Fixes bug 19660; bugfix on 0.2.5.1-alpha. + - Allow the setrlimit syscall, and the prlimit and prlimit64 + syscalls, which some libc implementations use under the hood. + Fixes bug 15221; bugfix on 0.2.5.1-alpha. + - Avoid a 10-second delay when starting as a client with "Sandbox 1" + enabled and no DNS resolvers configured. This should help TAILS + start up faster. Fixes bug 18548; bugfix on 0.2.5.1-alpha. + - Fix a crash when using offline master ed25519 keys with the Linux + seccomp2 sandbox enabled. Fixes bug 17675; bugfix on 0.2.7.3-rc. + - Allow statistics to be written to disk when "Sandbox 1" is + enabled. Fixes bugs 19556 and 19957; bugfix on 0.2.5.1-alpha and + 0.2.6.1-alpha respectively. + + o Minor bugfixes (logging): + - In log messages that include a function name, use __FUNCTION__ + instead of __PRETTY_FUNCTION__. In GCC, these are synonymous, but + with clang __PRETTY_FUNCTION__ has extra information we don't + need. Fixes bug 16563; bugfix on 0.0.2pre8. Fix by Tom van + der Woerdt. + - Remove needless quotes from a log message about unparseable + addresses. Fixes bug 17843; bugfix on 0.2.3.3-alpha. + - Scrub service name in "unrecognized service ID" log messages. + Fixes bug 18600; bugfix on 0.2.4.11-alpha. + - When logging information about an unparsable networkstatus vote or + consensus, do not say "vote" when we mean consensus. Fixes bug + 18368; bugfix on 0.2.0.8-alpha. + - When we can't generate a signing key because OfflineMasterKey is + set, do not imply that we should have been able to load it. Fixes + bug 18133; bugfix on 0.2.7.2-alpha. + - When logging a malformed hostname received through socks4, scrub + it if SafeLogging says we should. Fixes bug 17419; bugfix + on 0.1.1.16-rc. + + o Minor bugfixes (memory safety): + - Avoid freeing an uninitialized pointer when opening a socket fails + in get_interface_addresses_ioctl(). Fixes bug 18454; bugfix on + 0.2.3.11-alpha. Reported by toralf and "cypherpunks", patch + by teor. + - Fix a memory leak in "tor --list-fingerprint". Fixes part of bug + 18672; bugfix on 0.2.5.1-alpha. + - Fix a memory leak in tor-gencert. Fixes part of bug 18672; bugfix + on 0.2.0.1-alpha. + + o Minor bugfixes (pluggable transports): + - Avoid reporting a spurious error when we decide that we don't need + to terminate a pluggable transport because it has already exited. + Fixes bug 18686; bugfix on 0.2.5.5-alpha. + + o Minor bugfixes (pointer arithmetic): + - Fix a bug in memarea_alloc() that could have resulted in remote + heap write access, if Tor had ever passed an unchecked size to + memarea_alloc(). Fortunately, all the sizes we pass to + memarea_alloc() are pre-checked to be less than 128 kilobytes. + Fixes bug 19150; bugfix on 0.2.1.1-alpha. Bug found by + Guido Vranken. + + o Minor bugfixes (private directory): + - Prevent a race condition when creating private directories. Fixes + part of bug 17852; bugfix on 0.0.2pre13. Part of ticket 17852. + Patch from jsturgix. Found with Flawfinder. + + o Minor bugfixes (relays): + - Check that both the ORPort and DirPort (if present) are reachable + before publishing a relay descriptor. Otherwise, relays publish a + descriptor with DirPort 0 when the DirPort reachability test takes + longer than the ORPort reachability test. Fixes bug 18050; bugfix + on 0.1.0.1-rc. Reported by "starlight", patch by teor. + - Resolve some edge cases where we might launch an ORPort + reachability check even when DisableNetwork is set. Noticed while + fixing bug 18616; bugfix on 0.2.3.9-alpha. + + o Minor bugfixes (relays, hidden services): + - Refuse connection requests to private OR addresses unless + ExtendAllowPrivateAddresses is set. Previously, tor would connect, + then refuse to send any cells to a private address. Fixes bugs + 17674 and 8976; bugfix on 0.2.3.21-rc. Patch by teor. + + o Minor bugfixes (security, hidden services): + - Prevent hidden services connecting to client-supplied rendezvous + addresses that are reserved as internal or multicast. Fixes bug + 8976; bugfix on 0.2.3.21-rc. Patch by dgoulet and teor. + + o Minor bugfixes (statistics): + - Consistently check for overflow in round_*_to_next_multiple_of + functions, and add unit tests with additional and maximal values. + Fixes part of bug 13192; bugfix on 0.2.2.1-alpha. + - Handle edge cases in the laplace functions: avoid division by + zero, avoid taking the log of zero, and silence clang type + conversion warnings using round and trunc. Add unit tests for edge + cases with maximal values. Fixes part of bug 13192; bugfix + on 0.2.6.2-alpha. + - We now include consensus downloads via IPv6 in our directory- + request statistics. Fixes bug 18460; bugfix on 0.2.3.14-alpha. + + o Minor bugfixes (test networks, IPv6): + - Allow internal IPv6 addresses in descriptors in test networks. + Fixes bug 17153; bugfix on 0.2.3.16-alpha. Patch by teor, reported + by karsten. + + o Minor bugfixes (testing): + - Check the full results of SHA256 and SHA512 digests in the unit + tests. Bugfix on 0.2.2.4-alpha. Patch by teor. + - Fix a memory leak in the ntor test. Fixes bug 17778; bugfix + on 0.2.4.8-alpha. + - Fix a small memory leak that would occur when the + TestingEnableCellStatsEvent option was turned on. Fixes bug 18673; + bugfix on 0.2.5.2-alpha. + - Make unit tests pass on IPv6-only systems, and systems without + localhost addresses (like some FreeBSD jails). Fixes bug 17632; + bugfix on 0.2.7.3-rc. Patch by teor. + - The test for log_heartbeat was incorrectly failing in timezones + with non-integer offsets. Instead of comparing the end of the time + string against a constant, compare it to the output of + format_local_iso_time when given the correct input. Fixes bug + 18039; bugfix on 0.2.5.4-alpha. + - We no longer disable assertions in the unit tests when coverage is + enabled. Instead, we require you to say --disable-asserts-in-tests + to the configure script if you need assertions disabled in the + unit tests (for example, if you want to perform branch coverage). + Fixes bug 18242; bugfix on 0.2.7.1-alpha. + + o Minor bugfixes (time handling): + - When correcting a corrupt 'struct tm' value, fill in the tm_wday + field. Otherwise, our unit tests crash on Windows. Fixes bug + 18977; bugfix on 0.2.2.25-alpha. + - Avoid overflow in tor_timegm when parsing dates in and after 2038 + on platforms with 32-bit time_t. Fixes bug 18479; bugfix on + 0.0.2pre14. Patch by teor. + + o Minor bugfixes (tor-gencert): + - Correctly handle the case where an authority operator enters a + passphrase but sends an EOF before sending a newline. Fixes bug + 17443; bugfix on 0.2.0.20-rc. Found by junglefowl. + + o Code simplification and refactoring: + - Clean up a little duplicated code in + crypto_expand_key_material_TAP(). Closes ticket 17587; patch + from "pfrankw". + - Decouple the list of streams waiting to be attached to circuits + from the overall connection list. This change makes it possible to + attach streams quickly while simplifying Tor's callgraph and + avoiding O(N) scans of the entire connection list. Closes + ticket 17590. + - Extract the more complicated parts of circuit_mark_for_close() + into a new function that we run periodically before circuits are + freed. This change removes more than half of the functions + currently in the "blob". Closes ticket 17218. + - Move logging of redundant policy entries in + policies_parse_exit_policy_internal into its own function. Closes + ticket 17608; patch from "juce". + - Quote all the string interpolations in configure.ac -- even those + which we are pretty sure can't contain spaces. Closes ticket + 17744. Patch from zerosion. + - Remove code for configuring OpenSSL dynamic locks; OpenSSL doesn't + use them. Closes ticket 17926. + - Remove specialized code for non-inplace AES_CTR. 99% of our AES is + inplace, so there's no need to have a separate implementation for + the non-inplace code. Closes ticket 18258. Patch from Malek. + - Simplify return types for some crypto functions that can't + actually fail. Patch from Hassan Alsibyani. Closes ticket 18259. + - When a direct directory request fails immediately on launch, + instead of relaunching that request from inside the code that + launches it, instead mark the connection for teardown. This change + simplifies Tor's callback and prevents the directory-request + launching code from invoking itself recursively. Closes + ticket 17589. + + o Documentation: + - Add a description of the correct use of the '--keygen' command- + line option. Closes ticket 17583; based on text by 's7r'. + - Change build messages to refer to "Fedora" instead of "Fedora + Core", and "dnf" instead of "yum". Closes tickets 18459 and 18426. + Patches from "icanhasaccount" and "cypherpunks". + - Document the contents of the 'datadir/keys' subdirectory in the + manual page. Closes ticket 17621. + - Document the minimum HeartbeatPeriod value. Closes ticket 15638. + - Explain actual minima for BandwidthRate. Closes ticket 16382. + - Fix a minor formatting typo in the manpage. Closes ticket 17791. + - Mention torspec URL in the manpage and point the reader to it + whenever we mention a document that belongs in torspce. Fixes + issue 17392. + - Stop recommending use of nicknames to identify relays in our + MapAddress documentation. Closes ticket 18312. + + o Removed features: + - Remove client-side support for connecting to Tor relays running + versions of Tor before 0.2.3.6-alpha. These relays didn't support + the v3 TLS handshake protocol, and are no longer allowed on the + Tor network. Implements the client side of ticket 11150. Based on + patches by Tom van der Woerdt. + - We no longer maintain an internal freelist in memarea.c. + Allocators should be good enough to make this code unnecessary, + and it's doubtful that it ever had any performance benefit. + + o Testing: + - Add unit tests to check for common RNG failure modes, such as + returning all zeroes, identical values, or incrementing values + (OpenSSL's rand_predictable feature). Patch by teor. + - Always test both ed25519 backends, so that we can be sure that our + batch-open replacement code works. Part of ticket 16794. + - Cover dns_resolve_impl() in dns.c with unit tests. Implements a + portion of ticket 16831. + - Fix several warnings from clang's address sanitizer produced in + the unit tests. + - Log more information when the backtrace tests fail. Closes ticket + 17892. Patch from "cypherpunks." + - More unit tests for compat_libevent.c, procmon.c, tortls.c, + util_format.c, directory.c, and options_validate.c. Closes tickets + 17075, 17082, 17084, 17003, and 17076 respectively. Patches from + Ola Bini. + - Treat backtrace test failures as expected on FreeBSD until we + solve bug 17808. Closes ticket 18204. + - Unit tests for directory_handle_command_get. Closes ticket 17004. + Patch from Reinaldo de Souza Jr. + + + Changes in version 0.2.7.6 - 2015-12-10 Tor version 0.2.7.6 fixes a major bug in entry guard selection, as well as a minor bug in hidden service reliability. @@ -91,7 +1176,7 @@ Changes in version 0.2.7.5 - 2015-11-20 - New HSFETCH command to launch a request for a hidden service descriptor. Closes ticket 14847. - New HSPOST command to upload a hidden service descriptor. Closes - ticket 3523. Patch by "DonnchaC". + ticket 3523. Patch by Donncha. o Major features (Ed25519 identity keys, Proposal 220): - Add support for offline encrypted Ed25519 master keys. To use this @@ -349,11 +1434,11 @@ Changes in version 0.2.7.5 - 2015-11-20 o Minor bugfixes (torrc exit policies): - In each instance above, usage advice is provided to avoid the - message. Resolves ticket 16069. Patch by "teor". Fixes part of bug + message. Resolves ticket 16069. Patch by teor. Fixes part of bug 16069; bugfix on 0.2.4.7-alpha. - In torrc, "accept6 *" and "reject6 *" ExitPolicy lines now only produce IPv6 wildcard addresses. Previously they would produce - both IPv4 and IPv6 wildcard addresses. Patch by "teor". Fixes part + both IPv4 and IPv6 wildcard addresses. Patch by teor. Fixes part of bug 16069; bugfix on 0.2.4.7-alpha. - When parsing torrc ExitPolicies, we now issue an info-level message when expanding an "accept/reject *" line to include both @@ -378,7 +1463,7 @@ Changes in version 0.2.7.5 - 2015-11-20 o Minor bugfixes (compilation): - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347; - bugfix on 0.2.5.1-alpha. Patch from 'jamestk'. + bugfix on 0.2.5.1-alpha. Patch from "jamestk". - Repair compilation with the most recent (unreleased, alpha) vesions of OpenSSL 1.1. Fixes part of ticket 17237. @@ -394,7 +1479,7 @@ Changes in version 0.2.7.5 - 2015-11-20 currently empty, this fix will only change tor's behavior when it has default fallback directories. Includes unit tests for consider_adding_dir_servers(). Fixes bug 15642; bugfix on - 90f6071d8dc0 in 0.2.4.7-alpha. Patch by "teor". + 90f6071d8dc0 in 0.2.4.7-alpha. Patch by teor. o Minor bugfixes (controller): - Add the descriptor ID in each HS_DESC control event. It was @@ -419,7 +1504,7 @@ Changes in version 0.2.7.5 - 2015-11-20 A previous typo meant that we could keep going with an uninitialized crypto library, and would have OpenSSL initialize its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced - when implementing ticket 4900. Patch by "teor". + when implementing ticket 4900. Patch by teor. o Minor bugfixes (hidden service): - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on @@ -430,7 +1515,7 @@ Changes in version 0.2.7.5 - 2015-11-20 o Minor bugfixes (Linux seccomp2 sandbox): - Use the sandbox in tor_open_cloexec whether or not O_CLOEXEC is - defined. Patch by "teor". Fixes bug 16515; bugfix on 0.2.3.1-alpha. + defined. Patch by teor. Fixes bug 16515; bugfix on 0.2.3.1-alpha. - Allow bridge authorities to run correctly under the seccomp2 sandbox. Fixes bug 16964; bugfix on 0.2.5.1-alpha. - Add the "hidserv-stats" filename to our sandbox filter for the @@ -440,7 +1525,7 @@ Changes in version 0.2.7.5 - 2015-11-20 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.10): - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need these when eventfd2() support is missing. Fixes bug 16363; bugfix - on 0.2.6.3-alpha. Patch from "teor". + on 0.2.6.3-alpha. Patch from teor. o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.9): - Allow systemd connections to work with the Linux seccomp2 sandbox @@ -465,7 +1550,7 @@ Changes in version 0.2.7.5 - 2015-11-20 o Minor bugfixes (open file limit): - Fix set_max_file_descriptors() to set by default the max open file limit to the current limit when setrlimit() fails. Fixes bug - 16274; bugfix on tor- 0.2.0.10-alpha. Patch by dgoulet. + 16274; bugfix on 0.2.0.10-alpha. Patch by dgoulet. o Minor bugfixes (portability): - Check correctly for Windows socket errors in the workqueue @@ -492,7 +1577,7 @@ Changes in version 0.2.7.5 - 2015-11-20 o Minor bugfixes (security, exit policies): - ExitPolicyRejectPrivate now also rejects the relay's published IPv6 address (if any), and any publicly routable IPv4 or IPv6 - addresses on any local interfaces. ticket 17027. Patch by "teor". + addresses on any local interfaces. ticket 17027. Patch by teor. Fixes bug 17027; bugfix on 0.2.0.11-alpha. o Minor bugfixes (statistics): @@ -513,7 +1598,7 @@ Changes in version 0.2.7.5 - 2015-11-20 previous fix used TestingTorNetwork, which implies ExtendAllowPrivateAddresses, but this excluded rare configurations where ExtendAllowPrivateAddresses is set but TestingTorNetwork is - not. Fixes bug 15771; bugfix on 0.2.6.1-alpha. Patch by "teor", + not. Fixes bug 15771; bugfix on 0.2.6.1-alpha. Patch by teor, issue discovered by CJ Ess. o Minor bugfixes (tests, also in 0.2.6.9): @@ -594,7 +1679,7 @@ Changes in version 0.2.7.5 - 2015-11-20 required "ORPort connectivity". While this is true, it is in no way unique to the HSDir flag. Of all the flags, only HSDirs need a DirPort configured in order for the authorities to assign that - particular flag. Patch by "teor". Fixed as part of 14882; bugfix + particular flag. Patch by teor. Fixed as part of 14882; bugfix on 0.2.6.3-alpha. - Fix the usage message of tor-resolve(1) so that it no longer lists the removed -F option. Fixes bug 16913; bugfix on 0.2.2.28-beta. @@ -639,7 +1724,7 @@ Changes in version 0.2.7.5 - 2015-11-20 o Testing: - The test-network.sh script now supports performance testing. Requires corresponding chutney performance testing changes. Patch - by "teor". Closes ticket 14175. + by teor. Closes ticket 14175. - Add a new set of callgraph analysis scripts that use clang to produce a list of which Tor functions are reachable from which other Tor functions. We're planning to use these to help simplify @@ -648,16 +1733,16 @@ Changes in version 0.2.7.5 - 2015-11-20 tests, including integration tests with stem and chutney. - Autodetect CHUTNEY_PATH if the chutney and Tor sources are side- by-side in the same parent directory. Closes ticket 16903. Patch - by "teor". + by teor. - Document use of coverity, clang static analyzer, and clang dynamic undefined behavior and address sanitizers in doc/HACKING. Include - detailed usage instructions in the blacklist. Patch by "teor". + detailed usage instructions in the blacklist. Patch by teor. Closes ticket 15817. - Make "bridges+hs" the default test network. This tests almost all tor functionality during make test-network, while allowing tests to succeed on non-IPv6 systems. Requires chutney commit 396da92 in test-network-bridges-hs. Closes tickets 16945 (tor) and 16946 - (chutney). Patches by "teor". + (chutney). Patches by teor. - Make the test-workqueue test work on Windows by initializing the network before we begin. - New make target (make test-network-all) to run multiple applicable @@ -689,7 +1774,7 @@ Changes in version 0.2.7.5 - 2015-11-20 - Add unit tests for control_event_is_interesting(). Add a compile- time check that the number of events doesn't exceed the capacity of control_event_t.event_mask. Closes ticket 15431, checks for - bugs similar to 13085. Patch by "teor". + bugs similar to 13085. Patch by teor. - Command-line argument tests moved to Stem. Resolves ticket 14806. - Integrate the ntor, backtrace, and zero-length keys tests into the automake test suite. Closes ticket 15344. @@ -700,7 +1785,7 @@ Changes in version 0.2.7.5 - 2015-11-20 configure options. Implements ticket 15400. - New TestingDirAuthVote{Exit,Guard,HSDir}IsStrict flags to explicitly manage consensus flags in testing networks. Patch by - "robgjansen", modified by "teor". Implements part of ticket 14882. + robgjansen, modified by teor. Implements part of ticket 14882. - Check for matching value in server response in ntor_ref.py. Fixes bug 15591; bugfix on 0.2.4.8-alpha. Reported and fixed by "joelanders". @@ -746,12 +1831,12 @@ Changes in version 0.2.6.10 - 2015-07-12 A previous typo meant that we could keep going with an uninitialized crypto library, and would have OpenSSL initialize its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced - when implementing ticket 4900. Patch by "teor". + when implementing ticket 4900. Patch by teor. o Minor bugfixes (Linux seccomp2 sandbox): - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need these when eventfd2() support is missing. Fixes bug 16363; bugfix - on 0.2.6.3-alpha. Patch from "teor". + on 0.2.6.3-alpha. Patch from teor. Changes in version 0.2.6.9 - 2015-06-11 @@ -1286,12 +2371,12 @@ Changes in version 0.2.6.6 - 2015-03-24 keep the default on a testing network at 30 seconds. This reduces HS bootstrap time to around 25 seconds. Also, change the default time in test-network.sh to match. Closes ticket 13401. Patch - by "teor". + by teor. - Create TestingDirAuthVoteHSDir to correspond to TestingDirAuthVoteExit/Guard. Ensures that authorities vote the HSDir flag for the listed relays regardless of uptime or ORPort connectivity. Respects the value of VoteOnHidServDirectoriesV2. - Partial implementation for ticket 14067. Patch by "teor". + Partial implementation for ticket 14067. Patch by teor. o Minor features (tor2web mode): - Introduce the config option Tor2webRendezvousPoints, which allows @@ -1333,7 +2418,7 @@ Changes in version 0.2.6.6 - 2015-03-24 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". + 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 @@ -1369,7 +2454,7 @@ Changes in version 0.2.6.6 - 2015-03-24 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". + 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 @@ -1494,7 +2579,7 @@ Changes in version 0.2.6.6 - 2015-03-24 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". + 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. @@ -1619,27 +2704,27 @@ Changes in version 0.2.6.6 - 2015-03-24 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". + 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". + 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". + 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". + 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". + 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 @@ -1647,17 +2732,17 @@ Changes in version 0.2.6.6 - 2015-03-24 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". + 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". + 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". + 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 @@ -1855,7 +2940,7 @@ Changes in version 0.2.6.6 - 2015-03-24 - 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". + 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. @@ -1941,7 +3026,7 @@ Changes in version 0.2.5.11 - 2015-03-17 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". + 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. @@ -2505,10 +3590,10 @@ Changes in version 0.2.5.10 - 2014-10-24 bug 4677; bugfix on 0.2.3.2-alpha. Patch from "piet". - In routerlist_assert_ok(), don't take the address of a routerinfo's cache_info member unless that routerinfo is non-NULL. - Fixes bug 13096; bugfix on 0.1.1.9-alpha. Patch by "teor". + Fixes bug 13096; bugfix on 0.1.1.9-alpha. Patch by teor. - Fix a large number of false positive warnings from the clang analyzer static analysis tool. This should make real warnings - easier for clang analyzer to find. Patch from "teor". Closes + easier for clang analyzer to find. Patch from teor. Closes ticket 13036. - Resolve GCC complaints on OpenBSD about discarding constness in TO_{ORIGIN,OR}_CIRCUIT functions. Fixes part of bug 11633; bugfix @@ -2585,7 +3670,7 @@ Changes in version 0.2.5.10 - 2014-10-24 recognize, log its command as an integer. Fixes part of bug 12700; bugfix on 0.2.1.10-alpha. - Escape all strings from the directory connection before logging - them. Fixes bug 13071; bugfix on 0.1.1.15. Patch from "teor". + them. Fixes bug 13071; bugfix on 0.1.1.15. Patch from teor. - Squelch a spurious LD_BUG message "No origin circuit for successful SOCKS stream" in certain hidden service failure cases; fixes bug 10616. |