commit 31cc63deb69db819ed55aca406ebaaa52500730e Author: Nick Mathewson nickm@torproject.org Date: Sat Mar 3 07:58:00 2018 -0500

copy changelog into release notes --- ReleaseNotes | 174 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 174 insertions(+)

diff --git a/ReleaseNotes b/ReleaseNotes index df32fb778..671f2ff48 100644 --- a/ReleaseNotes +++ b/ReleaseNotes @@ -2,6 +2,180 @@ This document summarizes new features and bugfixes in each stable release of Tor. If you want to see more detailed descriptions of the changes in each development snapshot, see the ChangeLog file.

+Changes in version 0.3.2.10 - 2018-03-03 + Tor 0.3.2.10 is the second stable release in the 0.3.2 series. It + backports a number of bugfixes, including important fixes for security + issues. + + It includes an important security fix for a remote crash attack + against directory authorities, tracked as TROVE-2018-001. + + Additionally, it backports a fix for a bug whose severity we have + upgraded: Bug 24700, which was fixed in 0.3.3.2-alpha, can be remotely + triggered in order to crash relays with a use-after-free pattern. As + such, we are now tracking that bug as TROVE-2018-002 and + CVE-2018-0491, and backporting it to earlier releases. This bug + affected versions 0.3.2.1-alpha through 0.3.2.9, as well as version + 0.3.3.1-alpha. + + This release also backports our new system for improved resistance to + denial-of-service attacks against relays. + + This release also fixes several minor bugs and annoyances from + earlier releases. + + Relays running 0.3.2.x SHOULD upgrade to one of the versions released + today, for the fix to TROVE-2018-002. Directory authorities should + also upgrade. (Relays on earlier versions might want to update too for + the DoS mitigations.) + + o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha): + - Fix a protocol-list handling bug that could be used to remotely crash + directory authorities with a null-pointer exception. Fixes bug 25074; + bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and + CVE-2018-0490. + + o Major bugfixes (scheduler, KIST, denial-of-service, backport from 0.3.3.2-alpha): + - Avoid adding the same channel twice in the KIST scheduler pending + list, which could lead to remote denial-of-service use-after-free + attacks against relays. Fixes bug 24700; bugfix on 0.3.2.1-alpha. + + o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha): + - Give relays some defenses against the recent network overload. We + start with three defenses (default parameters in parentheses). + First: if a single client address makes too many concurrent + connections (>100), hang up on further connections. Second: if a + single client address makes circuits too quickly (more than 3 per + second, with an allowed burst of 90) while also having too many + connections open (3), refuse new create cells for the next while + (1-2 hours). Third: if a client asks to establish a rendezvous + point to you directly, ignore the request. These defenses can be + manually controlled by new torrc options, but relays will also + take guidance from consensus parameters, so there's no need to + configure anything manually. Implements ticket 24902. + + o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha): + - Fix an "off by 2" error in counting rendezvous failures on the + onion service side. While we thought we would stop the rendezvous + attempt after one failed circuit, we were actually making three + circuit attempts before giving up. Now switch to a default of 2, + and allow the consensus parameter "hs_service_max_rdv_failures" to + override. Fixes bug 24895; bugfix on 0.0.6. + - New-style (v3) onion services now obey the "max rendezvous circuit + attempts" logic. Previously they would make as many rendezvous + circuit attempts as they could fit in the MAX_REND_TIMEOUT second + window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha. + + o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha): + - Add Link protocol version 5 to the supported protocols list. Fixes + bug 25070; bugfix on 0.3.1.1-alpha. + + o Major bugfixes (relay, backport from 0.3.3.1-alpha): + - Fix a set of false positives where relays would consider + connections to other relays as being client-only connections (and + thus e.g. deserving different link padding schemes) if those + relays fell out of the consensus briefly. Now we look only at the + initial handshake and whether the connection authenticated as a + relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha. + + o Major bugfixes (scheduler, consensus, backport from 0.3.3.2-alpha): + - The scheduler subsystem was failing to promptly notice changes in + consensus parameters, making it harder to switch schedulers + network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha. + + o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha): + - Make our OOM handler aware of the geoip client history cache so it + doesn't fill up the memory. This check is important for IPv6 and + our DoS mitigation subsystem. Closes ticket 25122. + + o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha): + - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released. + Previous versions of Tor would not have worked with OpenSSL 1.1.1, + since they neither disabled TLS 1.3 nor enabled any of the + ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites. + Closes ticket 24978. + + o Minor features (geoip): + - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2 + Country database. + + o Minor features (logging, diagnostic, backport from 0.3.3.2-alpha): + - When logging a failure to check a hidden service's certificate, + also log what the problem with the certificate was. Diagnostic + for ticket 24972. + + o Minor bugfix (channel connection, backport from 0.3.3.2-alpha): + - Use the actual observed address of an incoming relay connection, + not the canonical address of the relay from its descriptor, when + making decisions about how to handle the incoming connection. + Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera". + + o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha): + - Fix a possible crash on malformed consensus. If a consensus had + contained an unparseable protocol line, it could have made clients + and relays crash with a null-pointer exception. To exploit this + issue, however, an attacker would need to be able to subvert the + directory authority system. Fixes bug 25251; bugfix on + 0.2.9.4-alpha. Also tracked as TROVE-2018-004. + + o Minor bugfix (directory authority, backport from 0.3.3.2-alpha): + - Directory authorities, when refusing a descriptor from a rejected + relay, now explicitly tell the relay (in its logs) to set a valid + ContactInfo address and contact the bad-relays@ mailing list. + Fixes bug 25170; bugfix on 0.2.9.1. + + o Minor bugfixes (build, rust, backport from 0.3.3.1-alpha): + - When building with Rust on OSX, link against libresolv, to work + around the issue at https://github.com/rust-lang/rust/issues/46797. + Fixes bug 24652; bugfix on 0.3.1.1-alpha. + + o Minor bugfixes (onion services, backport from 0.3.3.2-alpha): + - Remove a BUG() statement when a client fetches an onion descriptor + that has a lower revision counter than the one in its cache. This + can happen in normal circumstances due to HSDir desync. Fixes bug + 24976; bugfix on 0.3.2.1-alpha. + + o Minor bugfixes (logging, backport from 0.3.3.2-alpha): + - Don't treat inability to store a cached consensus object as a bug: + it can happen normally when we are out of disk space. Fixes bug + 24859; bugfix on 0.3.1.1-alpha. + + o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha): + - Improve the performance of our consensus-diff application code + when Tor is built with the --enable-fragile-hardening option set. + Fixes bug 24826; bugfix on 0.3.1.1-alpha. + + o Minor bugfixes (OSX, backport from 0.3.3.1-alpha): + - Don't exit the Tor process if setrlimit() fails to change the file + limit (which can happen sometimes on some versions of OSX). Fixes + bug 21074; bugfix on 0.0.9pre5. + + o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha): + - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on + 0.2.9.4-alpha. + - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249; + bugfix on 0.2.9.4-alpha. + + o Minor bugfixes (testing, backport from 0.3.3.1-alpha): + - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug + 25005; bugfix on 0.3.2.7-rc. + + o Minor bugfixes (v3 onion services, backport from 0.3.3.2-alpha): + - Look at the "HSRend" protocol version, not the "HSDir" protocol + version, when deciding whether a consensus entry can support the + v3 onion service protocol as a rendezvous point. Fixes bug 25105; + bugfix on 0.3.2.1-alpha. + + o Code simplification and refactoring (backport from 0.3.3.3-alpha): + - Update the "rust dependencies" submodule to be a project-level + repository, rather than a user repository. Closes ticket 25323. + + o Documentation (backport from 0.3.3.1-alpha) + - Document that operators who run more than one relay or bridge are + expected to set MyFamily and ContactInfo correctly. Closes + ticket 24526. + + Changes in version 0.3.2.9 - 2018-01-09 Tor 0.3.2.9 is the first stable release in the 0.3.2 series.