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Diffstat (limited to 'ChangeLog')
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@@ -1,3 +1,1282 @@ +Changes in version 0.3.2.2-alpha - 2017-09-29 + Tor 0.3.2.2-alpha is the second release in the 0.3.2 series. This + release fixes several minor bugs in the new scheduler and next- + generation onion services; both features were newly added in the 0.3.2 + series. Other fixes in this alpha include several fixes for non-fatal + tracebacks which would appear in logs. + + With the aim to stabilise the 0.3.2 series by 15 December 2017, this + alpha does not contain any substantial new features. Minor features + include better testing and logging. + + The following comprises the complete list of changes included + in tor-0.3.2.2-alpha: + + o Major bugfixes (relay, crash, assertion failure): + - 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 Major bugfixes (scheduler): + - If a channel is put into the scheduler's pending list, then it + starts closing, and then if the scheduler runs before it finishes + closing, the scheduler will get stuck trying to flush its cells + while the lower layers refuse to cooperate. Fix that race + condition by giving the scheduler an escape method. Fixes bug + 23676; bugfix on 0.3.2.1-alpha. + + o Minor features (build, compilation): + - The "check-changes" feature is now part of the "make check" tests; + we'll use it to try to prevent misformed changes files from + accumulating. Closes ticket 23564. + - Tor builds should now fail if there are any mismatches between the + C type representing a configuration variable and the C type the + data-driven parser uses to store a value there. Previously, we + needed to check these by hand, which sometimes led to mistakes. + Closes ticket 23643. + + o Minor features (directory authorities): + - 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 (hidden service, circuit, logging): + - Improve logging of many callsite in the circuit subsystem to print + the circuit identifier(s). + - Log when we cleanup an intro point from a service so we know when + and for what reason it happened. Closes ticket 23604. + + o Minor features (logging): + - Log more circuit information whenever we are about to try to + package a relay cell on a circuit with a nonexistent n_chan. + Attempt to diagnose ticket 8185. + - Improve info-level log identification of particular circuits, to + help with debugging. Closes ticket 23645. + + o Minor features (relay): + - When choosing which circuits can be expired as unused, consider + circuits from clients even if those clients used regular CREATE + cells to make them; and do not consider circuits from relays even + if they were made with CREATE_FAST. Part of ticket 22805. + + o Minor features (robustness): + - Change several fatal assertions when flushing buffers into non- + fatal assertions, to prevent any recurrence of 23690. + + o Minor features (spec conformance, bridge, diagnostic): + - When handling the USERADDR command on an ExtOrPort, warn when the + transports provides a USERADDR with no port. In a future version, + USERADDR commands of this format may be rejected. Detects problems + related to ticket 23080. + + o Minor features (testing): + - Add a unit test to make sure that our own generated platform + string will be accepted by directory authorities. Closes + ticket 22109. + + o Minor bugfixes (bootstrapping): + - When warning about state file clock skew, report the correct + direction for the detected skew. Fixes bug 23606; bugfix + on 0.2.8.1-alpha. + - Avoid an assertion failure when logging a state file clock skew + very early in bootstrapping. Fixes bug 23607; bugfix + on 0.3.2.1-alpha. + + o Minor bugfixes (build, compilation): + - Fix a compilation warning when building with zstd support on + 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found + and fixed by Andreas Stieger. + - When searching for OpenSSL, don't accept any OpenSSL library that + lacks TLSv1_1_method(): Tor doesn't build with those versions. + Additionally, look in /usr/local/opt/openssl, if it's present. + These changes together repair the default build on OSX systems + with Homebrew installed. Fixes bug 23602; bugfix on 0.2.7.2-alpha. + + o Minor bugfixes (compression): + - Handle a pathological case when decompressing Zstandard data when + the output buffer size is zero. Fixes bug 23551; bugfix + on 0.3.1.1-alpha. + + o Minor bugfixes (documentation): + - Fix manpage to not refer to the obsolete (and misspelled) + UseEntryGuardsAsDirectoryGuards parameter in the description of + NumDirectoryGuards. Fixes bug 23611; bugfix on 0.2.4.8-alpha. + + o Minor bugfixes (hidden service v3): + - Don't log an assertion failure when we can't find the right + information to extend to an introduction point. In rare cases, + this could happen, causing a warning, even though tor would + recover gracefully. Fixes bug 23159; bugfix on 0.3.2.1-alpha. + - Pad RENDEZVOUS cell up to the size of the legacy cell which is + much bigger so the rendezvous point can't distinguish which hidden + service protocol is being used. Fixes bug 23420; bugfix + on 0.3.2.1-alpha. + + o Minor bugfixes (hidden service, relay): + - Avoid a possible double close of a circuit by the intro point on + error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610; + bugfix on 0.3.0.1-alpha. + + o Minor bugfixes (logging, relay shutdown, annoyance): + - When a circuit is marked for close, do not attempt to package any + cells for channels on that circuit. Previously, we would detect + this condition lower in the call stack, when we noticed that the + circuit had no attached channel, and log an annoying message. + Fixes bug 8185; bugfix on 0.2.5.4-alpha. + + o Minor bugfixes (scheduler): + - When switching schedulers due to a consensus change, we didn't + give the new scheduler a chance to react to the consensus. Fix + that. Fixes bug 23537; bugfix on 0.3.2.1-alpha. + - Make the KISTSchedRunInterval option a non negative value. With + this, the way to disable KIST through the consensus is to set it + to 0. Fixes bug 23539; bugfix on 0.3.2.1-alpha. + - Only notice log the selected scheduler when we switch scheduler + types. Fixes bug 23552; bugfix on 0.3.2.1-alpha. + - Avoid a compilation warning on macOS in scheduler_ev_add() caused + by a different tv_usec data type. Fixes bug 23575; bugfix + on 0.3.2.1-alpha. + - Make a hard exit if tor is unable to pick a scheduler which can + happen if the user specifies a scheduler type that is not + supported and not other types in Schedulers. Fixes bug 23581; + bugfix on 0.3.2.1-alpha. + - Properly initialize the scheduler last run time counter so it is + not 0 at the first tick. Fixes bug 23696; bugfix on 0.3.2.1-alpha. + + o Minor bugfixes (testing): + - Capture and detect several "Result does not fit" warnings in unit + tests on platforms with 32-bit time_t. Fixes bug 21800; bugfix + on 0.2.9.3-alpha. + - Fix additional channelpadding unit test failures by using mocked + time instead of actual time for all tests. Fixes bug 23608; bugfix + on 0.3.1.1-alpha. + - The removal of some old scheduler options caused some tests to + fail on BSD systems. Assume current behavior is correct and make + the tests pass again. Fixes bug 23566; bugfix on 0.3.2.1-alpha. + + o Code simplification and refactoring: + - Remove various ways of testing circuits and connections for + "clientness"; instead, favor channel_is_client(). Part of + ticket 22805. + + o Deprecated features: + - The ReachableDirAddresses and ClientPreferIPv6DirPort options are + now deprecated; they do not apply to relays, and they have had no + effect on clients since 0.2.8.x. Closes ticket 19704. + + o Documentation: + - HiddenServiceVersion man page entry wasn't mentioning the now + supported version 3. Fixes ticket 23580; bugfix on 0.3.2.1-alpha. + - Clarify that the Address option is entirely about setting an + advertised IPv4 address. Closes ticket 18891. + - Clarify the manpage's use of the term "address" to clarify what + kind of address is intended. Closes ticket 21405. + - Document that onion service subdomains are allowed, and ignored. + Closes ticket 18736. + + +Changes in version 0.3.2.1-alpha - 2017-09-18 + Tor 0.3.2.1-alpha is the first release in the 0.3.2.x series. It + includes support for our next-generation ("v3") onion service + protocol, and adds a new circuit scheduler for more responsive + forwarding decisions from relays. There are also numerous other small + features and bugfixes here. + + Below are the changes since Tor 0.3.1.7. + + o Major feature (scheduler, channel): + - Tor now uses new schedulers to decide which circuits should + deliver cells first, in order to improve congestion at relays. The + first type is called "KIST" ("Kernel Informed Socket Transport"), + and is only available on Linux-like systems: it uses feedback from + the kernel to prevent the kernel's TCP buffers from growing too + full. The second new scheduler type is called "KISTLite": it + behaves the same as KIST, but runs on systems without kernel + support for inspecting TCP implementation details. The old + scheduler is still available, under the name "Vanilla". To change + the default scheduler preference order, use the new "Schedulers" + option. (The default preference order is "KIST,KISTLite,Vanilla".) + + Matt Traudt implemented KIST, based on research by Rob Jansen, + John Geddes, Christ Wacek, Micah Sherr, and Paul Syverson. For + more information, see the design paper at + http://www.robgjansen.com/publications/kist-sec2014.pdf and the + followup implementation paper at https://arxiv.org/abs/1709.01044. + Closes ticket 12541. + + o Major features (next-generation onion services): + - Tor now supports the next-generation onion services protocol for + clients and services! As part of this release, the core of + proposal 224 has been implemented and is available for + experimentation and testing by our users. This newer version of + onion services ("v3") features many improvements over the legacy + system, including: + + a) Better crypto (replaced SHA1/DH/RSA1024 + with SHA3/ed25519/curve25519) + + b) Improved directory protocol, leaking much less information to + directory servers. + + c) Improved directory protocol, with smaller surface for + targeted attacks. + + d) Better onion address security against impersonation. + + e) More extensible introduction/rendezvous protocol. + + f) A cleaner and more modular codebase. + + You can identify a next-generation onion address by its length: + they are 56 characters long, as in + "4acth47i6kxnvkewtm6q7ib2s3ufpo5sqbsnzjpbi7utijcltosqemad.onion". + + In the future, we will release more options and features for v3 + onion services, but we first need a testing period, so that the + current codebase matures and becomes more robust. Planned features + include: offline keys, advanced client authorization, improved + guard algorithms, and statistics. For full details, see + proposal 224. + + Legacy ("v2") onion services will still work for the foreseeable + future, and will remain the default until this new codebase gets + tested and hardened. Service operators who want to experiment with + the new system can use the 'HiddenServiceVersion 3' torrc + directive along with the regular onion service configuration + options. We will publish a blog post about this new feature + soon! Enjoy! + + o Major bugfixes (usability, control port): + - Report trusted clock skew indications as bootstrap errors, so + controllers can more easily alert users when their clocks are + wrong. Fixes bug 23506; bugfix on 0.1.2.6-alpha. + + o Minor features (bug detection): + - Log a warning message with a stack trace for any attempt to call + get_options() during option validation. This pattern has caused + subtle bugs in the past. Closes ticket 22281. + + o Minor features (client): + - You can now use Tor as a tunneled HTTP proxy: use the new + HTTPTunnelPort option to open a port that accepts HTTP CONNECT + requests. Closes ticket 22407. + - Add an extra check to make sure that we always use the newer guard + selection code for picking our guards. Closes ticket 22779. + - When downloading (micro)descriptors, don't split the list into + multiple requests unless we want at least 32 descriptors. + Previously, we split at 4, not 32, which led to significant + overhead in HTTP request size and degradation in compression + performance. Closes ticket 23220. + + o Minor features (command line): + - Add a new commandline option, --key-expiration, which prints when + the current signing key is going to expire. Implements ticket + 17639; patch by Isis Lovecruft. + + o Minor features (control port): + - If an application tries to use the control port as an HTTP proxy, + respond with a meaningful "This is the Tor control port" message, + and log the event. Closes ticket 1667. Patch from Ravi + Chandra Padmala. + - Provide better error message for GETINFO desc/(id|name) when not + fetching router descriptors. Closes ticket 5847. Patch by + Kevin Butler. + - Add GETINFO "{desc,md}/download-enabled", to inform the controller + whether Tor will try to download router descriptors and + microdescriptors respectively. Closes ticket 22684. + - Added new GETINFO targets "ip-to-country/{ipv4,ipv6}-available", + so controllers can tell whether the geoip databases are loaded. + Closes ticket 23237. + - Adds a timestamp field to the CIRC_BW and STREAM_BW bandwidth + events. Closes ticket 19254. Patch by "DonnchaC". + + o Minor features (development support): + - Developers can now generate a call-graph for Tor using the + "calltool" python program, which post-processes object dumps. It + should work okay on many Linux and OSX platforms, and might work + elsewhere too. To run it, install calltool from + https://gitweb.torproject.org/user/nickm/calltool.git and run + "make callgraph". Closes ticket 19307. + + o Minor features (ed25519): + - Add validation function to checks for torsion components in + ed25519 public keys, used by prop224 client-side code. Closes + ticket 22006. Math help by Ian Goldberg. + + o Minor features (exit relay, DNS): + - Improve the clarity and safety of the log message from evdns when + receiving an apparently spoofed DNS reply. Closes ticket 3056. + + o Minor features (integration, hardening): + - Add a new NoExec option to prevent Tor from running other + programs. When this option is set to 1, Tor will never try to run + another program, regardless of the settings of + PortForwardingHelper, ClientTransportPlugin, or + ServerTransportPlugin. Once NoExec is set, it cannot be disabled + without restarting Tor. Closes ticket 22976. + + o Minor features (logging): + - Improve the warning message for specifying a relay by nickname. + The previous message implied that nickname registration was still + part of the Tor network design, which it isn't. Closes + ticket 20488. + - If the sandbox filter fails to load, suggest to the user that + their kernel might not support seccomp2. Closes ticket 23090. + + o Minor features (portability): + - Check at configure time whether uint8_t is the same type as + unsigned char. Lots of existing code already makes this + assumption, and there could be strict aliasing issues if the + assumption is violated. Closes ticket 22410. + + o Minor features (relay, configuration): + - Reject attempts to use relative file paths when RunAsDaemon is + set. Previously, Tor would accept these, but the directory- + changing step of RunAsDaemon would give strange and/or confusing + results. Closes ticket 22731. + + o Minor features (startup, safety): + - When configured to write a PID file, Tor now exits if it is unable + to do so. Previously, it would warn and continue. Closes + ticket 20119. + + o Minor features (static analysis): + - The BUG() macro has been changed slightly so that Coverity no + longer complains about dead code if the bug is impossible. Closes + ticket 23054. + + o Minor features (testing): + - The default chutney network tests now include tests for the v3 + hidden service design. Make sure you have the latest version of + chutney if you want to run these. Closes ticket 22437. + - Add a unit test to verify that we can parse a hardcoded v2 hidden + service descriptor. Closes ticket 15554. + + o Minor bugfixes (certificate handling): + - Fix a time handling bug in Tor certificates set to expire after + the year 2106. Fixes bug 23055; bugfix on 0.3.0.1-alpha. Found by + Coverity as CID 1415728. + + o Minor bugfixes (client, usability): + - Refrain from needlessly rejecting SOCKS5-with-hostnames and + SOCKS4a requests that contain IP address strings, even when + SafeSocks in enabled, as this prevents user from connecting to + known IP addresses without relying on DNS for resolving. SafeSocks + still rejects SOCKS connections that connect to IP addresses when + those addresses are _not_ encoded as hostnames. Fixes bug 22461; + bugfix on Tor 0.2.6.2-alpha. + + o Minor bugfixes (code correctness): + - Call htons() in extend_cell_format() for encoding a 16-bit value. + Previously we used ntohs(), which happens to behave the same on + all the platforms we support, but which isn't really correct. + Fixes bug 23106; bugfix on 0.2.4.8-alpha. + - For defense-in-depth, make the controller's write_escaped_data() + function robust to extremely long inputs. Fixes bug 19281; bugfix + on 0.1.1.1-alpha. Reported by Guido Vranken. + + o Minor bugfixes (compilation): + - Fix unused-variable warnings in donna's Curve25519 SSE2 code. + Fixes bug 22895; bugfix on 0.2.7.2-alpha. + + o Minor bugfixes (consensus expiry): + - Check for adequate directory information correctly. Previously, Tor + would reconsider whether it had sufficient directory information + every 2 minutes. Fixes bug 23091; bugfix on 0.2.0.19-alpha. + + o Minor bugfixes (directory protocol): + - Directory servers now include a "Date:" http header for response + codes other than 200. Clients starting with a skewed clock and a + recent consensus were getting "304 Not modified" responses from + directory authorities, so without the Date header, the client + would never hear about a wrong clock. Fixes bug 23499; bugfix + on 0.0.8rc1. + - Make clients wait for 6 seconds before trying to download a + consensus from an authority. Fixes bug 17750; bugfix + on 0.2.8.1-alpha. + + o Minor bugfixes (DoS-resistance): + - If future code asks if there are any running bridges, without + checking if bridges are enabled, log a BUG warning rather than + crashing. Fixes bug 23524; bugfix on 0.3.0.1-alpha. + + o Minor bugfixes (format strictness): + - Restrict several data formats to decimal. Previously, the + BuildTimeHistogram entries in the state file, the "bw=" entries in + the bandwidth authority file, and the process IDs passed to the + __OwningControllerProcess option could all be specified in hex or + octal as well as in decimal. This was not an intentional feature. + Fixes bug 22802; bugfixes on 0.2.2.1-alpha, 0.2.2.2-alpha, + and 0.2.2.28-beta. + + o Minor bugfixes (heartbeat): + - If we fail to write a heartbeat message, schedule a retry for the + minimum heartbeat interval number of seconds in the future. Fixes + bug 19476; bugfix on 0.2.3.1-alpha. + + o Minor bugfixes (linux seccomp2 sandbox, logging): + - Fix some messages on unexpected errors from the seccomp2 library. + Fixes bug 22750; bugfix on 0.2.5.1-alpha. Patch from "cypherpunks". + + o Minor bugfixes (logging): + - Remove duplicate log messages regarding opening non-local + SocksPorts upon parsing config and opening listeners at startup. + Fixes bug 4019; bugfix on 0.2.3.3-alpha. + - Use a more comprehensible log message when telling the user + they've excluded every running exit node. Fixes bug 7890; bugfix + on 0.2.2.25-alpha. + - When logging the number of descriptors we intend to download per + directory request, do not log a number higher than then the number + of descriptors we're fetching in total. Fixes bug 19648; bugfix + on 0.1.1.8-alpha. + - When warning about a directory owned by the wrong user, log the + actual name of the user owning the directory. Previously, we'd log + the name of the process owner twice. Fixes bug 23487; bugfix + on 0.2.9.1-alpha. + - The tor specification says hop counts are 1-based, so fix two log + messages that mistakenly logged 0-based hop counts. Fixes bug + 18982; bugfix on 0.2.6.2-alpha and 0.2.4.5-alpha. Patch by teor. + Credit to Xiaofan Li for reporting this issue. + + o Minor bugfixes (portability): + - Stop using the PATH_MAX variable, which is not defined on GNU + Hurd. Fixes bug 23098; bugfix on 0.3.1.1-alpha. + + o Minor bugfixes (relay): + - When uploading our descriptor for the first time after startup, + report the reason for uploading as "Tor just started" rather than + leaving it blank. Fixes bug 22885; bugfix on 0.2.3.4-alpha. + - Avoid unnecessary calls to directory_fetches_from_authorities() on + relays, to prevent spurious address resolutions and descriptor + rebuilds. This is a mitigation for bug 21789. Fixes bug 23470; + bugfix on in 0.2.8.1-alpha. + + o Minor bugfixes (tests): + - Fix a broken unit test for the OutboundAddress option: the parsing + function was never returning an error on failure. Fixes bug 23366; + bugfix on 0.3.0.3-alpha. + - Fix a signed-integer overflow in the unit tests for + dir/download_status_random_backoff, which was untriggered until we + fixed bug 17750. Fixes bug 22924; bugfix on 0.2.9.1-alpha. + + o Minor bugfixes (usability, control port): + - Stop making an unnecessary routerlist check in NETINFO clock skew + detection; this was preventing clients from reporting NETINFO clock + skew to controllers. Fixes bug 23532; bugfix on 0.2.4.4-alpha. + + o Code simplification and refactoring: + - Extract the code for handling newly-open channels into a separate + function from the general code to handle channel state + transitions. This change simplifies our callgraph, reducing the + size of the largest strongly connected component by roughly a + factor of two. Closes ticket 22608. + - Remove dead code for largely unused statistics on the number of + times we've attempted various public key operations. Fixes bug + 19871; bugfix on 0.1.2.4-alpha. Fix by Isis Lovecruft. + - Remove several now-obsolete functions for asking about old + variants directory authority status. Closes ticket 22311; patch + from "huyvq". + - Remove some of the code that once supported "Named" and "Unnamed" + routers. Authorities no longer vote for these flags. Closes + ticket 22215. + - Rename the obsolete malleable hybrid_encrypt functions used in TAP + and old hidden services, to indicate that they aren't suitable for + new protocols or formats. Closes ticket 23026. + - Replace our STRUCT_OFFSET() macro with offsetof(). Closes ticket + 22521. Patch from Neel Chauhan. + - Split the enormous circuit_send_next_onion_skin() function into + multiple subfunctions. Closes ticket 22804. + - Split the portions of the buffer.c module that handle particular + protocols into separate modules. Part of ticket 23149. + - Use our test macros more consistently, to produce more useful + error messages when our unit tests fail. Add coccinelle patches to + allow us to re-check for test macro uses. Closes ticket 22497. + + o Deprecated features: + - Deprecate HTTPProxy/HTTPProxyAuthenticator config options. They + only applies to direct unencrypted HTTP connections to your + directory server, which your Tor probably isn't using. Closes + ticket 20575. + + o Documentation: + - Clarify in the manual that "Sandbox 1" is only supported on Linux + kernels. Closes ticket 22677. + - Document all values of PublishServerDescriptor in the manpage. + Closes ticket 15645. + - Improve the documentation for the directory port part of the + DirAuthority line. Closes ticket 20152. + - Restore documentation for the authorities' "approved-routers" + file. Closes ticket 21148. + + o Removed features: + - The AllowDotExit option has been removed as unsafe. It has been + deprecated since 0.2.9.2-alpha. Closes ticket 23426. + - The ClientDNSRejectInternalAddresses flag can no longer be set on + non-testing networks. It has been deprecated since 0.2.9.2-alpha. + Closes ticket 21031. + - The controller API no longer includes an AUTHDIR_NEWDESCS event: + nobody was using it any longer. Closes ticket 22377. + + +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 0.2.9.12 - 2017-09-18 + Tor 0.2.9.12 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 + + o Major features (security, backport from 0.3.0.2-alpha): + - Change the algorithm used to decide DNS TTLs on client and server + side, to better resist DNS-based correlation attacks like the + DefecTor attack of Greschbach, Pulls, Roberts, Winter, and + Feamster. Now relays only return one of two possible DNS TTL + values, and clients are willing to believe DNS TTL values up to 3 + hours long. Closes ticket 19769. + + o Major bugfixes (crash, directory connections, backport from 0.3.0.5-rc): + - Fix a rare crash when sending a begin cell on a circuit whose + linked directory connection had already been closed. Fixes bug + 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett. + + o Major bugfixes (DNS, backport from 0.3.0.2-alpha): + - Fix a bug that prevented exit nodes from caching DNS records for + more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha. + + o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha): + - Fix a typo that had prevented TPROXY-based transparent proxying + from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha. + Patch from "d4fq0fQAgoJ". + + 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 (code style, backport from 0.3.1.3-alpha): + - Add "Falls through" comments to our codebase, in order to silence + GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas + Stieger. Closes ticket 22446. + + o Minor features (geoip): + - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2 + Country database. + + o Minor bugfixes (bandwidth accounting, backport from 0.3.1.1-alpha): + - Roll over monthly accounting at the configured hour and minute, + rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1. + Found by Andrey Karpov with PVS-Studio. + + o Minor bugfixes (compilation, backport from 0.3.1.5-alpha): + - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915; + bugfix on 0.2.8.1-alpha. + - Fix warnings when building with libscrypt and openssl scrypt support + on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha. + - When building with certain versions the mingw C header files, avoid + float-conversion warnings when calling the C functions isfinite(), + isnan(), and signbit(). Fixes bug 22801; bugfix on 0.2.8.1-alpha. + + o Minor bugfixes (compilation, backport from 0.3.1.7): + - Avoid compiler warnings in the unit tests for running tor_sscanf() + with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha. + + 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 (controller, backport from 0.3.1.7): + - Do not crash when receiving a HSPOST command with an empty body. + Fixes part of bug 22644; bugfix on 0.2.7.1-alpha. + - Do not crash when receiving a POSTDESCRIPTOR command with an + empty body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha. + + o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha): + - Avoid Coverity build warnings related to our BUG() macro. By + default, Coverity treats BUG() as the Linux kernel does: an + instant abort(). We need to override that so our BUG() macro + doesn't prevent Coverity from analyzing functions that use it. + Fixes bug 23030; bugfix on 0.2.9.1-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 Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha): + - When setting the maximum number of connections allowed by the OS, + always allow some extra file descriptors for other files. Fixes + bug 22797; bugfix on 0.2.0.10-alpha. + + o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha): + - Avoid a sandbox failure when trying to re-bind to a socket and + mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha. + + o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha): + - Permit the fchmod system call, to avoid crashing on startup when + starting with the seccomp2 sandbox and an unexpected set of + permissions on the data directory or its contents. Fixes bug + 22516; bugfix on 0.2.5.4-alpha. + + o Minor bugfixes (relay, backport from 0.3.0.5-rc): + - Avoid a double-marked-circuit warning that could happen when we + receive DESTROY cells under heavy load. Fixes bug 20059; bugfix + on 0.1.0.1-rc. + + o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha): + - Reject version numbers with non-numeric prefixes (such as +, -, or + whitespace). Disallowing whitespace prevents differential version + parsing between POSIX-based and Windows platforms. Fixes bug 21507 + and part of 21508; bugfix on 0.0.8pre1. + + 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 0.3.0.11 - 2017-09-18 + Tor 0.3.0.11 backports a collection of bugfixes from Tor the 0.3.1 + 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 + + o Minor features (code style, backport from 0.3.1.7): + - Add "Falls through" comments to our codebase, in order to silence + GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas + Stieger. Closes ticket 22446. + + o Minor features: + - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2 + Country database. + + o Minor bugfixes (compilation, backport from 0.3.1.7): + - Avoid compiler warnings in the unit tests for calling tor_sscanf() + with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha. + + o Minor bugfixes (controller, backport from 0.3.1.7): + - Do not crash when receiving a HSPOST command with an empty body. + Fixes part of bug 22644; bugfix on 0.2.7.1-alpha. + - Do not crash when receiving a POSTDESCRIPTOR command with an empty + body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha. + + o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha): + - When setting the maximum number of connections allowed by the OS, + always allow some extra file descriptors for other files. Fixes + bug 22797; bugfix on 0.2.0.10-alpha. + + o Minor bugfixes (logging, relay, backport from 0.3.1.6-rc): + - Remove a forgotten debugging message when an introduction point + successfully establishes a hidden service prop224 circuit with + a client. + - Change three other log_warn() for an introduction point to + protocol warnings, because they can be failure from the network + and are not relevant to the operator. Fixes bug 23078; bugfix on + 0.3.0.1-alpha and 0.3.0.2-alpha. + + +Changes in version 0.3.1.7 - 2017-09-18 + Tor 0.3.1.7 is the first stable release in the 0.3.1 series. + + With the 0.3.1 series, Tor now serves and downloads directory + information in more compact formats, to save on bandwidth overhead. It + also contains a new padding system to resist netflow-based traffic + analysis, and experimental support for building parts of Tor in Rust + (though no parts of Tor are in Rust yet). There are also numerous + small features, bugfixes on earlier release series, and groundwork for + the hidden services revamp of 0.3.2. + + This release also 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 + + Per our stable release policy, we plan to support each stable release + series for at least the next nine months, or for three months after + the first stable release of the next series: whichever is longer. If + you need a release with long-term support, we recommend that you stay + with the 0.2.9 series. + + Below is a list of the changes since 0.3.1.6-rc. For a list of all + changes since 0.3.0, see the ReleaseNotes file. + + o Major bugfixes (security, hidden services, loggging): + - Fix a bug where we could log uninitialized stack when a certain + hidden service error occurred while SafeLogging was disabled. + Fixes bug #23490; bugfix on 0.2.7.2-alpha. This is also tracked as + TROVE-2017-008 and CVE-2017-0380. + + o Minor features (defensive programming): + - Create a pair of consensus parameters, nf_pad_tor2web and + nf_pad_single_onion, to disable netflow padding in the consensus + for non-anonymous connections in case the overhead is high. Closes + ticket 17857. + + o Minor features (diagnostic): + - Add a stack trace to the bug warnings that can be logged when + trying to send an outgoing relay cell with n_chan == 0. Diagnostic + attempt for bug 23105. + + o Minor features (geoip): + - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2 + Country database. + + o Minor bugfixes (compilation): + - Avoid compiler warnings in the unit tests for calling tor_sscanf() + with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha. + + o Minor bugfixes (controller): + - Do not crash when receiving a HSPOST command with an empty body. + Fixes part of bug 22644; bugfix on 0.2.7.1-alpha. + - Do not crash when receiving a POSTDESCRIPTOR command with an empty + body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha. + + o Minor bugfixes (relay): + - Inform the geoip and rephist modules about all requests, even on + relays that are only fetching microdescriptors. Fixes a bug + related to 21585; bugfix on 0.3.0.1-alpha. + + o Minor bugfixes (unit tests): + - Fix a channelpadding unit test failure on slow systems by using + mocked time instead of actual time. Fixes bug 23077; bugfix + on 0.3.1.1-alpha. + + +Changes in version 0.3.1.6-rc - 2017-09-05 + Tor 0.3.1.6-rc fixes a few small bugs and annoyances in the 0.3.1 + release series, including a bug that produced weird behavior on + Windows directory caches. + + This is the first release candidate in the Tor 0.3.1 series. If we + find no new bugs or regressions here, the first stable 0.3.1 release + will be nearly identical to it. + + o Major bugfixes (windows, directory cache): + - On Windows, do not try to delete cached consensus documents and + diffs before they are unmapped from memory--Windows won't allow + that. Instead, allow the consensus cache directory to grow larger, + to hold files that might need to stay around longer. Fixes bug + 22752; bugfix on 0.3.1.1-alpha. + + o Minor features (directory authority): + - Improve the message that authorities report to relays that present + RSA/Ed25519 keypairs that conflict with previously pinned keys. + Closes ticket 22348. + + o Minor features (geoip): + - Update geoip and geoip6 to the August 3 2017 Maxmind GeoLite2 + Country database. + + o Minor features (testing): + - Add more tests for compression backend initialization. Closes + ticket 22286. + + o Minor bugfixes (directory cache): + - Fix a memory leak when recovering space in the consensus cache. + Fixes bug 23139; bugfix on 0.3.1.1-alpha. + + o Minor bugfixes (hidden service): + - Increase the number of circuits that a service is allowed to + open over a specific period of time. The value was lower than it + should be (8 vs 12) in the normal case of 3 introduction points. + Fixes bug 22159; bugfix on 0.3.0.5-rc. + - Fix a BUG warning during HSv3 descriptor decoding that could be + cause by a specially crafted descriptor. Fixes bug 23233; bugfix + on 0.3.0.1-alpha. Bug found by "haxxpop". + - Rate-limit the log messages if we exceed the maximum number of + allowed intro circuits. Fixes bug 22159; bugfix on 0.3.1.1-alpha. + + o Minor bugfixes (logging, relay): + - Remove a forgotten debugging message when an introduction point + successfully establishes a hidden service prop224 circuit with + a client. + - Change three other log_warn() for an introduction point to + protocol warnings, because they can be failure from the network + and are not relevant to the operator. Fixes bug 23078; bugfix on + 0.3.0.1-alpha and 0.3.0.2-alpha. + + o Minor bugfixes (relay): + - When a relay is not running as a directory cache, it will no + longer generate compressed consensuses and consensus diff + information. Previously, this was a waste of disk and CPU. Fixes + bug 23275; bugfix on 0.3.1.1-alpha. + + o Minor bugfixes (robustness, error handling): + - Improve our handling of the cases where OpenSSL encounters a + memory error while encoding keys and certificates. We haven't + observed these errors in the wild, but if they do happen, we now + detect and respond better. Fixes bug 19418; bugfix on all versions + of Tor. Reported by Guido Vranken. + + o Minor bugfixes (stability): + - Avoid crashing on a double-free when unable to load or process an + included file. Fixes bug 23155; bugfix on 0.3.1.1-alpha. Found + with the clang static analyzer. + + o Minor bugfixes (testing): + - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291; + bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij. + - Port the hs_ntor handshake test to work correctly with recent + versions of the pysha3 module. Fixes bug 23071; bugfix + on 0.3.1.1-alpha. + + o Minor bugfixes (Windows service): + - When running as a Windows service, set the ID of the main thread + correctly. Failure to do so made us fail to send log messages to + the controller in 0.2.1.16-rc, slowed down controller event + delivery in 0.2.7.3-rc and later, and crash with an assertion + failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha. + Patch and diagnosis from "Vort". + + +Changes in version 0.3.0.10 - 2017-08-02 + Tor 0.3.0.10 backports a collection of small-to-medium bugfixes + from the current Tor alpha series. OpenBSD users and TPROXY users + should upgrade; others are probably okay sticking with 0.3.0.9. + + o Major features (build system, continuous integration, 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. + + o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha): + - Fix a typo that had prevented TPROXY-based transparent proxying + from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha. + Patch from "d4fq0fQAgoJ". + + 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 "0xbar" 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 (backport from 0.3.1.5-alpha): + - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2 + Country database. + + o Minor bugfixes (bandwidth accounting, backport from 0.3.1.2-alpha): + - Roll over monthly accounting at the configured hour and minute, + rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1. + Found by Andrey Karpov with PVS-Studio. + + o Minor bugfixes (compilation warnings, backport from 0.3.1.5-alpha): + - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915; + bugfix on 0.2.8.1-alpha. + - Fix warnings when building with libscrypt and openssl scrypt + support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha. + - When building with certain versions of the mingw C header files, + avoid float-conversion warnings when calling the C functions + isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix + on 0.2.8.1-alpha. + + 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 (coverity build support, backport from 0.3.1.5-alpha): + - Avoid Coverity build warnings related to our BUG() macro. By + default, Coverity treats BUG() as the Linux kernel does: an + instant abort(). We need to override that so our BUG() macro + doesn't prevent Coverity from analyzing functions that use it. + Fixes bug 23030; bugfix on 0.2.9.1-alpha. + + o Minor bugfixes (directory authority, backport from 0.3.1.1-alpha): + - When rejecting a router descriptor for running an obsolete version + of Tor without ntor support, warn about the obsolete tor version, + not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha. + + o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha): + - Avoid a sandbox failure when trying to re-bind to a socket and + mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha. + + o Minor bugfixes (unit tests, backport from 0.3.1.5-alpha) + - Fix a memory leak in the link-handshake/certs_ok_ed25519 test. + Fixes bug 22803; bugfix on 0.3.0.1-alpha. + + +Changes in version 0.3.1.5-alpha - 2017-08-01 + Tor 0.3.1.5-alpha improves the performance of consensus diff + calculation, fixes a crash bug on older versions of OpenBSD, and fixes + several other bugs. If no serious bugs are found in this version, the + next version will be a release candidate. + + This release also marks the end of support for the Tor 0.2.4.x, + 0.2.6.x, and 0.2.7.x release series. Those releases will receive no + further bug or security fixes. Anyone still running or distributing + one of those versions should upgrade. + + o Major features (build system, continuous integration): + - 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. + + o Major bugfixes (openbsd, denial-of-service): + - Avoid an assertion failure bug affecting our implementation of + inet_pton(AF_INET6) on certain OpenBSD systems whose strtol() + handling of "0xbar" differs from what we had expected. Fixes bug + 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007. + + o Major bugfixes (relay, performance): + - Perform circuit handshake operations at a higher priority than we + use for consensus diff creation and compression. This should + prevent circuits from starving when a relay or bridge receives a + new consensus, especially on lower-powered machines. Fixes bug + 22883; bugfix on 0.3.1.1-alpha. + + o Minor features (bridge authority): + - Add "fingerprint" lines to the networkstatus-bridges file produced + by bridge authorities. Closes ticket 22207. + + o Minor features (directory cache, consensus diff): + - Add a new MaxConsensusAgeForDiffs option to allow directory cache + operators with low-resource environments to adjust the number of + consensuses they'll store and generate diffs from. Most cache + operators should leave it unchanged. Helps to work around + bug 22883. + + o Minor features (geoip): + - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2 + Country database. + + o Minor features (relay, performance): + - Always start relays with at least two worker threads, to prevent + priority inversion on slow tasks. Part of the fix for bug 22883. + - Allow background work to be queued with different priorities, so + that a big pile of slow low-priority jobs will not starve out + higher priority jobs. This lays the groundwork for a fix for + bug 22883. + + o Minor bugfixes (build system, rust): + - Fix a problem where Rust toolchains were not being found when + building without --enable-cargo-online-mode, due to setting the + $HOME environment variable instead of $CARGO_HOME. Fixes bug + 22830; bugfix on 0.3.1.1-alpha. Fix by Chelsea Komlo. + + o Minor bugfixes (compatibility, zstd): + - Write zstd epilogues correctly when the epilogue requires + reallocation of the output buffer, even with zstd 1.3.0. + (Previously, we worked on 1.2.0 and failed with 1.3.0). Fixes bug + 22927; bugfix on 0.3.1.1-alpha. + + o Minor bugfixes (compilation warnings): + - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug + 22915; bugfix on 0.2.8.1-alpha. + - Fix warnings when building with libscrypt and openssl scrypt + support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha. + - Compile correctly when both openssl 1.1.0 and libscrypt are + detected. Previously this would cause an error. Fixes bug 22892; + bugfix on 0.3.1.1-alpha. + - When building with certain versions of the mingw C header files, + avoid float-conversion warnings when calling the C functions + isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix + on 0.2.8.1-alpha. + + o Minor bugfixes (coverity build support): + - Avoid Coverity build warnings related to our BUG() macro. By + default, Coverity treats BUG() as the Linux kernel does: an + instant abort(). We need to override that so our BUG() macro + doesn't prevent Coverity from analyzing functions that use it. + Fixes bug 23030; bugfix on 0.2.9.1-alpha. + + o Minor bugfixes (directory authority): + - When a directory authority rejects a descriptor or extrainfo with + a given digest, mark that digest as undownloadable, so that we do + not attempt to download it again over and over. We previously + tried to avoid downloading such descriptors by other means, but we + didn't notice if we accidentally downloaded one anyway. This + behavior became problematic in 0.2.7.2-alpha, when authorities + began pinning Ed25519 keys. Fixes bug 22349; bugfix + on 0.2.1.19-alpha. + + o Minor bugfixes (error reporting, windows): + - When formatting Windows error messages, use the English format to + avoid codepage issues. Fixes bug 22520; bugfix on 0.1.2.8-alpha. + Patch from "Vort". + + o Minor bugfixes (file limits, osx): + - When setting the maximum number of connections allowed by the OS, + always allow some extra file descriptors for other files. Fixes + bug 22797; bugfix on 0.2.0.10-alpha. + + o Minor bugfixes (linux seccomp2 sandbox): + - Avoid a sandbox failure when trying to re-bind to a socket and + mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha. + + o Minor bugfixes (memory leaks): + - Fix a small memory leak when validating a configuration that uses + two or more AF_UNIX sockets for the same port type. Fixes bug + 23053; bugfix on 0.2.6.3-alpha. This is CID 1415725. + + o Minor bugfixes (unit tests): + - test_consdiff_base64cmp would fail on OS X because while OS X + follows the standard of (less than zero/zero/greater than zero), + it doesn't follow the convention of (-1/0/+1). Make the test + comply with the standard. Fixes bug 22870; bugfix on 0.3.1.1-alpha. + - Fix a memory leak in the link-handshake/certs_ok_ed25519 test. + Fixes bug 22803; bugfix on 0.3.0.1-alpha. + + +Changes in version 0.3.1.4-alpha - 2017-06-29 + Tor 0.3.1.4-alpha fixes a path selection bug that would allow a client + to use a guard that was in the same network family as a chosen exit + relay. This is a security regression; all clients running earlier + versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9 + or 0.3.1.4-alpha. + + This release also fixes several other bugs introduced in 0.3.0.x + and 0.3.1.x, including others that can affect bandwidth usage + and correctness. + + o New dependencies: + - To build with zstd and lzma support, Tor now requires the + pkg-config tool at build time. (This requirement was new in + 0.3.1.1-alpha, but was not noted at the time. Noting it here to + close ticket 22623.) + + o Major bugfixes (path selection, security): + - When choosing which guard to use for a circuit, avoid the exit's + family along with the exit itself. Previously, the new guard + selection logic avoided the exit, but did not consider its family. + Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017- + 006 and CVE-2017-0377. + + o Major bugfixes (compression, zstd): + - Correctly detect a full buffer when decompressing a large zstd- + compressed input. Previously, we would sometimes treat a full + buffer as an error. Fixes bug 22628; bugfix on 0.3.1.1-alpha. + + o Major bugfixes (directory protocol): + - Ensure that we send "304 Not modified" as HTTP status code when a + client is attempting to fetch a consensus or consensus diff, and + the best one we can send them is one they already have. Fixes bug + 22702; bugfix on 0.3.1.1-alpha. + + o Major bugfixes (entry guards): + - When starting with an old consensus, do not add new entry guards + unless the consensus is "reasonably live" (under 1 day old). Fixes + one root cause of bug 22400; bugfix on 0.3.0.1-alpha. + + o Minor features (bug mitigation, diagnostics, logging): + - Avoid an assertion failure, and log a better error message, when + unable to remove a file from the consensus cache on Windows. + Attempts to mitigate and diagnose bug 22752. + + o Minor features (geoip): + - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2 + Country database. + + o Minor bugfixes (compression): + - When compressing or decompressing a buffer, check for a failure to + create a compression object. Fixes bug 22626; bugfix + on 0.3.1.1-alpha. + - When decompressing a buffer, check for extra data after the end of + the compressed data. Fixes bug 22629; bugfix on 0.3.1.1-alpha. + - When decompressing an object received over an anonymous directory + connection, if we have already decompressed it using an acceptable + compression method, do not reject it for looking like an + unacceptable compression method. Fixes part of bug 22670; bugfix + on 0.3.1.1-alpha. + - When serving directory votes compressed with zlib, do not claim to + have compressed them with zstd. Fixes bug 22669; bugfix + on 0.3.1.1-alpha. + - When spooling compressed data to an output buffer, don't try to + spool more data when there is no more data to spool and we are not + trying to flush the input. Previously, we would sometimes launch + compression requests with nothing to do, which interferes with our + 22672 checks. Fixes bug 22719; bugfix on 0.2.0.16-alpha. + + o Minor bugfixes (defensive programming): + - Detect and break out of infinite loops in our compression code. We + don't think that any such loops exist now, but it's best to be + safe. Closes ticket 22672. + - 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 Minor bugfixes (linux seccomp2 sandbox): + - Permit the fchmod system call, to avoid crashing on startup when + starting with the seccomp2 sandbox and an unexpected set of + permissions on the data directory or its contents. Fixes bug + 22516; bugfix on 0.2.5.4-alpha. + - Fix a crash in the LZMA module, when the sandbox was enabled, and + liblzma would allocate more than 16 MB of memory. We solve this by + bumping the mprotect() limit in the sandbox module from 16 MB to + 20 MB. Fixes bug 22751; bugfix on 0.3.1.1-alpha. + + o Minor bugfixes (logging): + - When decompressing, do not warn if we fail to decompress using a + compression method that we merely guessed. Fixes part of bug + 22670; bugfix on 0.1.1.14-alpha. + - When decompressing, treat mismatch between content-encoding and + actual compression type as a protocol warning. Fixes part of bug + 22670; bugfix on 0.1.1.9-alpha. + - Downgrade "assigned_to_cpuworker failed" message to info-level + severity. In every case that can reach it, either a better warning + has already been logged, or no warning is warranted. Fixes bug + 22356; bugfix on 0.2.6.3-alpha. + - Demote a warn that was caused by libevent delays to info if + netflow padding is less than 4.5 seconds late, or to notice + if it is more (4.5 seconds is the amount of time that a netflow + record might be emitted after, if we chose the maximum timeout). + Fixes bug 22212; bugfix on 0.3.1.1-alpha. + + o Minor bugfixes (process behavior): + - When exiting because of an error, always exit with a nonzero exit + status. Previously, we would fail to report an error in our exit + status in cases related to __OwningControllerProcess failure, + lockfile contention, and Ed25519 key initialization. Fixes bug + 22720; bugfix on versions 0.2.1.6-alpha, 0.2.2.28-beta, and + 0.2.7.2-alpha respectively. Reported by "f55jwk4f"; patch + from "huyvq". + + o Documentation: + - Add a manpage description for the key-pinning-journal file. Closes + ticket 22347. + - Correctly note that bandwidth accounting values are stored in the + state file, and the bw_accounting file is now obsolete. Closes + ticket 16082. + - Document more of the files in the Tor data directory, including + cached-extrainfo, secret_onion_key{,_ntor}.old, hidserv-stats, + approved-routers, sr-random, and diff-cache. Found while fixing + ticket 22347. + + +Changes in version 0.3.0.9 - 2017-06-29 + Tor 0.3.0.9 fixes a path selection bug that would allow a client + to use a guard that was in the same network family as a chosen exit + relay. This is a security regression; all clients running earlier + versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9 or + 0.3.1.4-alpha. + + This release also backports several other bugfixes from the 0.3.1.x + series. + + o Major bugfixes (path selection, security, backport from 0.3.1.4-alpha): + - When choosing which guard to use for a circuit, avoid the exit's + family along with the exit itself. Previously, the new guard + selection logic avoided the exit, but did not consider its family. + Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017- + 006 and CVE-2017-0377. + + o Major bugfixes (entry guards, backport from 0.3.1.1-alpha): + - Don't block bootstrapping when a primary bridge is offline and we + can't get its descriptor. Fixes bug 22325; fixes one case of bug + 21969; bugfix on 0.3.0.3-alpha. + + o Major bugfixes (entry guards, backport from 0.3.1.4-alpha): + - When starting with an old consensus, do not add new entry guards + unless the consensus is "reasonably live" (under 1 day old). Fixes + one root cause of bug 22400; bugfix on 0.3.0.1-alpha. + + o Minor features (geoip): + - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2 + Country database. + + o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha): + - Reject version numbers with non-numeric prefixes (such as +, -, or + whitespace). Disallowing whitespace prevents differential version + parsing between POSIX-based and Windows platforms. Fixes bug 21507 + and part of 21508; bugfix on 0.0.8pre1. + + o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha): + - Permit the fchmod system call, to avoid crashing on startup when + starting with the seccomp2 sandbox and an unexpected set of + permissions on the data directory or its contents. Fixes bug + 22516; bugfix on 0.2.5.4-alpha. + + o Minor bugfixes (defensive programming, 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. + + Changes in version 0.3.1.3-alpha - 2017-06-08 Tor 0.3.1.3-alpha fixes a pair of bugs that would allow an attacker to remotely crash a hidden service with an assertion failure. Anyone @@ -1996,7 +3275,7 @@ Changes in version 0.3.0.1-alpha - 2016-12-19 subprotocol-versions mechanism, so that clients can tell which relays can identity themselves by Ed25519 ID. Closes ticket 20552. - o Minor features (fingerprinting resistence, authentication): + o Minor features (fingerprinting resistance, authentication): - Extend the length of RSA keys used for TLS link authentication to 2048 bits. (These weren't used for forward secrecy; for forward secrecy, we used P256.) Closes ticket 13752. @@ -5062,7 +6341,7 @@ Changes in version 0.2.6.8 - 2015-05-21 o Major bugfixes (hidden services, backport from 0.2.7.1-alpha): - Revert commit that made directory authorities assign the HSDir - flag to relay without a DirPort; this was bad because such relays + flag to relays without a DirPort; this was bad because such relays can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix on 0.2.6.3-alpha. @@ -5103,7 +6382,7 @@ Changes in version 0.2.7.1-alpha - 2015-05-12 o Major bugfixes (hidden services): - Revert commit that made directory authorities assign the HSDir - flag to relay without a DirPort; this was bad because such relays + flag to relays without a DirPort; this was bad because such relays can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix on 0.2.6.3-alpha. |