[tor-commits] [tor/release-0.3.3] and put those in the release notes too
arma at torproject.org
arma at torproject.org
Tue May 22 20:23:38 UTC 2018
commit 7dd0813e783ae16e6362e2e3c607476e645e2983
Author: Roger Dingledine <arma at torproject.org>
Date: Tue May 22 16:14:39 2018 -0400
and put those in the release notes too
---
ReleaseNotes | 407 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 407 insertions(+)
diff --git a/ReleaseNotes b/ReleaseNotes
index bbda36d2c..d36f87eea 100644
--- a/ReleaseNotes
+++ b/ReleaseNotes
@@ -637,6 +637,413 @@ Changes in version 0.3.3.6 - 2018-05-22
ticket 25248.
+Changes in version 0.3.1.10 - 2018-03-03
+ Tor 0.3.1.10 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.
+
+ 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.
+
+ All directory authorities should upgrade to one of the versions
+ released today. Relays running 0.3.1.x may wish to update to one of
+ the versions released today, for the DoS mitigations.
+
+ Please note: according to our release calendar, Tor 0.3.1 will no
+ longer be supported after 1 July 2018. If you will be running Tor
+ after that date, you should make sure to plan to upgrade to the latest
+ stable version, or downgrade to 0.2.9 (which will receive long-term
+ support).
+
+ 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 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 Minor features (linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
+ - Update the sandbox rules so that they should now work correctly
+ with Glibc 2.26. Closes ticket 24315.
+
+ 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.
+
+ 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 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 feature (relay statistics, backport from 0.3.2.6-alpha):
+ - Change relay bandwidth reporting stats interval from 4 hours to 24
+ hours in order to reduce the efficiency of guard discovery
+ attacks. Fixes ticket 23856.
+
+ 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 (fallback directory mirrors, backport from 0.3.2.9):
+ - The fallback directory list has been re-generated based on the
+ current status of the network. Tor uses fallback directories to
+ bootstrap when it doesn't yet have up-to-date directory
+ information. Closes ticket 24801.
+ - Make the default DirAuthorityFallbackRate 0.1, so that clients
+ prefer to bootstrap from fallback directory mirrors. This is a
+ follow-up to 24679, which removed weights from the default
+ fallbacks. Implements ticket 24681.
+
+ o Minor features (geoip):
+ - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
+ Country database.
+
+ 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 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 (address selection, backport from 0.3.2.9):
+ - When the fascist_firewall_choose_address_ functions don't find a
+ reachable address, set the returned address to the null address
+ and port. This is a precautionary measure, because some callers do
+ not check the return value. Fixes bug 24736; bugfix
+ on 0.2.8.2-alpha.
+
+ o Major bugfixes (bootstrapping, backport from 0.3.2.5-alpha):
+ - Fetch descriptors aggressively whenever we lack enough to build
+ circuits, regardless of how many descriptors we are missing.
+ Previously, we would delay launching the fetch when we had fewer
+ than 15 missing descriptors, even if some of those descriptors
+ were blocking circuits from building. Fixes bug 23985; bugfix on
+ 0.1.1.11-alpha. The effects of this bug became worse in
+ 0.3.0.3-alpha, when we began treating missing descriptors from our
+ primary guards as a reason to delay circuits.
+ - Don't try fetching microdescriptors from relays that have failed
+ to deliver them in the past. Fixes bug 23817; bugfix
+ on 0.3.0.1-alpha.
+
+ o Minor bugfixes (compilation, backport from 0.3.2.7-rc):
+ - Fix a signed/unsigned comparison warning introduced by our fix to
+ TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
+
+ o Minor bugfixes (control port, linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
+ - Avoid a crash when attempting to use the seccomp2 sandbox together
+ with the OwningControllerProcess feature. Fixes bug 24198; bugfix
+ on 0.2.5.1-alpha.
+
+ 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 bugfixes (directory cache, backport from 0.3.2.5-alpha):
+ - Recover better from empty or corrupt files in the consensus cache
+ directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
+ - When a consensus diff calculation is only partially successful,
+ only record the successful parts as having succeeded. Partial
+ success can happen if (for example) one compression method fails
+ but the others succeed. Previously we misrecorded all the
+ calculations as having succeeded, which would later cause a
+ nonfatal assertion failure. Fixes bug 24086; bugfix
+ on 0.3.1.1-alpha.
+
+ o Minor bugfixes (entry guards, backport from 0.3.2.3-alpha):
+ - Tor now updates its guard state when it reads a consensus
+ regardless of whether it's missing descriptors. That makes tor use
+ its primary guards to fetch descriptors in some edge cases where
+ it would previously have used fallback directories. Fixes bug
+ 23862; bugfix on 0.3.0.1-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 (memory usage, backport from 0.3.2.8-rc):
+ - When queuing DESTROY cells on a channel, only queue the circuit-id
+ and reason fields: not the entire 514-byte cell. This fix should
+ help mitigate any bugs or attacks that fill up these queues, and
+ free more RAM for other uses. Fixes bug 24666; bugfix
+ on 0.2.5.1-alpha.
+
+ o Minor bugfixes (network layer, backport from 0.3.2.5-alpha):
+ - When closing a connection via close_connection_immediately(), we
+ mark it as "not blocked on bandwidth", to prevent later calls from
+ trying to unblock it, and give it permission to read. This fixes a
+ backtrace warning that can happen on relays under various
+ circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
+
+ o Minor bugfixes (path selection, backport from 0.3.2.4-alpha):
+ - When selecting relays by bandwidth, avoid a rounding error that
+ could sometimes cause load to be imbalanced incorrectly.
+ Previously, we would always round upwards; now, we round towards
+ the nearest integer. This had the biggest effect when a relay's
+ weight adjustments should have given it weight 0, but it got
+ weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
+ - When calculating the fraction of nodes that have descriptors, and
+ all nodes in the network have zero bandwidths, count the number of
+ nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
+ - Actually log the total bandwidth in compute_weighted_bandwidths().
+ Fixes bug 24170; bugfix on 0.2.4.3-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 (portability, msvc, backport from 0.3.2.9):
+ - Fix a bug in the bit-counting parts of our timing-wheel code on
+ MSVC. (Note that MSVC is still not a supported build platform, due
+ to cyptographic timing channel risks.) Fixes bug 24633; bugfix
+ on 0.2.9.1-alpha.
+
+ o Minor bugfixes (relay, partial backport):
+ - Make the internal channel_is_client() function look at what sort
+ of connection handshake the other side used, rather than whether
+ the other side ever sent a create_fast cell to us. Backports part
+ of the fixes from bugs 22805 and 24898.
+
+ 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 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.
+
+
+Changes in version 0.2.9.15 - 2018-03-03
+ Tor 0.2.9.15 backports important security and stability bugfixes from
+ later Tor releases.
+
+ It includes an important security fix for a remote crash attack
+ against directory authorities, tracked as TROVE-2018-001.
+
+ 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.
+
+ All directory authorities should upgrade to one of the versions
+ released today. Relays running 0.2.9.x may wish to update to one of
+ the versions released today, 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 features (denial-of-service mitigation):
+ - 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 (bootstrapping):
+ - Fetch descriptors aggressively whenever we lack enough to build
+ circuits, regardless of how many descriptors we are missing.
+ Previously, we would delay launching the fetch when we had fewer
+ than 15 missing descriptors, even if some of those descriptors
+ were blocking circuits from building. Fixes bug 23985; bugfix on
+ 0.1.1.11-alpha. The effects of this bug became worse in
+ 0.3.0.3-alpha, when we began treating missing descriptors from our
+ primary guards as a reason to delay circuits.
+
+ o Major bugfixes (onion services, retry behavior):
+ - 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.
+
+ o Minor feature (relay statistics):
+ - Change relay bandwidth reporting stats interval from 4 hours to 24
+ hours in order to reduce the efficiency of guard discovery
+ attacks. Fixes ticket 23856.
+
+ o Minor features (compatibility, OpenSSL):
+ - 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 (denial-of-service avoidance):
+ - 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 (fallback directory mirrors):
+ - The fallback directory list has been re-generated based on the
+ current status of the network. Tor uses fallback directories to
+ bootstrap when it doesn't yet have up-to-date directory
+ information. Closes ticket 24801.
+ - Make the default DirAuthorityFallbackRate 0.1, so that clients
+ prefer to bootstrap from fallback directory mirrors. This is a
+ follow-up to 24679, which removed weights from the default
+ fallbacks. Implements ticket 24681.
+
+ o Minor features (geoip):
+ - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
+ Country database.
+
+ o Minor features (linux seccomp2 sandbox):
+ - Update the sandbox rules so that they should now work correctly
+ with Glibc 2.26. Closes ticket 24315.
+
+ o Minor bugfix (channel connection):
+ - 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 bugfix (directory authority):
+ - 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 (address selection):
+ - When the fascist_firewall_choose_address_ functions don't find a
+ reachable address, set the returned address to the null address
+ and port. This is a precautionary measure, because some callers do
+ not check the return value. Fixes bug 24736; bugfix
+ on 0.2.8.2-alpha.
+
+ o Minor bugfixes (compilation):
+ - Fix a signed/unsigned comparison warning introduced by our fix to
+ TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
+
+ o Minor bugfixes (control port, linux seccomp2 sandbox):
+ - Avoid a crash when attempting to use the seccomp2 sandbox together
+ with the OwningControllerProcess feature. Fixes bug 24198; bugfix
+ on 0.2.5.1-alpha.
+
+ 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 bugfixes (memory usage):
+ - When queuing DESTROY cells on a channel, only queue the circuit-id
+ and reason fields: not the entire 514-byte cell. This fix should
+ help mitigate any bugs or attacks that fill up these queues, and
+ free more RAM for other uses. Fixes bug 24666; bugfix
+ on 0.2.5.1-alpha.
+
+ o Minor bugfixes (network layer):
+ - When closing a connection via close_connection_immediately(), we
+ mark it as "not blocked on bandwidth", to prevent later calls from
+ trying to unblock it, and give it permission to read. This fixes a
+ backtrace warning that can happen on relays under various
+ circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
+
+ o Minor bugfixes (OSX):
+ - 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 (path selection):
+ - When selecting relays by bandwidth, avoid a rounding error that
+ could sometimes cause load to be imbalanced incorrectly.
+ Previously, we would always round upwards; now, we round towards
+ the nearest integer. This had the biggest effect when a relay's
+ weight adjustments should have given it weight 0, but it got
+ weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
+ - When calculating the fraction of nodes that have descriptors, and
+ all nodes in the network have zero bandwidths, count the number of
+ nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
+ - Actually log the total bandwidth in compute_weighted_bandwidths().
+ Fixes bug 24170; bugfix on 0.2.4.3-alpha.
+
+ o Minor bugfixes (portability, msvc):
+ - Fix a bug in the bit-counting parts of our timing-wheel code on
+ MSVC. (Note that MSVC is still not a supported build platform, due
+ to cryptographic timing channel risks.) Fixes bug 24633; bugfix
+ on 0.2.9.1-alpha.
+
+ o Minor bugfixes (relay):
+ - Make the internal channel_is_client() function look at what sort
+ of connection handshake the other side used, rather than whether
+ the other side ever sent a create_fast cell to us. Backports part
+ of the fixes from bugs 22805 and 24898.
+
+ 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.
+
+
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
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