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@@ -2,6 +2,156 @@ This document summarizes new features and bugfixes in each stable release
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of Tor. If you want to see more detailed descriptions of the changes in
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each development snapshot, see the ChangeLog file.
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+Changes in version 0.3.0.8 - 2017-06-08
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+ Tor 0.3.0.8 fixes a pair of bugs that would allow an attacker to
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+ remotely crash a hidden service with an assertion failure. Anyone
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+ running a hidden service should upgrade to this version, or to some
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+ other version with fixes for TROVE-2017-004 and TROVE-2017-005.
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+
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+ Tor 0.3.0.8 also includes fixes for several key management bugs
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+ that sometimes made relays unreliable, as well as several other
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+ bugfixes described below.
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+
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+ o Major bugfixes (hidden service, relay, security, backport
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+ from 0.3.1.3-alpha):
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+ - Fix a remotely triggerable assertion failure when a hidden service
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+ handles a malformed BEGIN cell. Fixes bug 22493, tracked as
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+ TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
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+ - Fix a remotely triggerable assertion failure caused by receiving a
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+ BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
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+ 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
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+ on 0.2.2.1-alpha.
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+
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+ o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
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+ - When performing the v3 link handshake on a TLS connection, report
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+ that we have the x509 certificate that we actually used on that
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+ connection, even if we have changed certificates since that
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+ connection was first opened. Previously, we would claim to have
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+ used our most recent x509 link certificate, which would sometimes
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+ make the link handshake fail. Fixes one case of bug 22460; bugfix
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+ on 0.2.3.6-alpha.
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+
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+ o Major bugfixes (relays, key management, backport from 0.3.1.3-alpha):
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+ - Regenerate link and authentication certificates whenever the key
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+ that signs them changes; also, regenerate link certificates
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+ whenever the signed key changes. Previously, these processes were
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+ only weakly coupled, and we relays could (for minutes to hours)
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+ wind up with an inconsistent set of keys and certificates, which
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+ other relays would not accept. Fixes two cases of bug 22460;
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+ bugfix on 0.3.0.1-alpha.
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+ - When sending an Ed25519 signing->link certificate in a CERTS cell,
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+ send the certificate that matches the x509 certificate that we
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+ used on the TLS connection. Previously, there was a race condition
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+ if the TLS context rotated after we began the TLS handshake but
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+ before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
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+ on 0.3.0.1-alpha.
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+
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+ o Major bugfixes (hidden service v3, backport from 0.3.1.1-alpha):
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+ - Stop rejecting v3 hidden service descriptors because their size
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+ did not match an old padding rule. Fixes bug 22447; bugfix on
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+ tor-0.3.0.1-alpha.
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+
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+ o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
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+ - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
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+ December 2016 (of which ~126 were still functional) with a list of
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+ 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
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+ 2017. Resolves ticket 21564.
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+
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+ o Minor bugfixes (configuration, backport from 0.3.1.1-alpha):
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+ - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
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+ bug 22252; bugfix on 0.2.9.3-alpha.
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+
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+ o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
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+ - Avoid undefined behavior when parsing IPv6 entries from the geoip6
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+ file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
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+
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+ o Minor bugfixes (link handshake, backport from 0.3.1.3-alpha):
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+ - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
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+ months, and regenerate it when it is within one month of expiring.
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+ Previously, we had generated this certificate at startup with a
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+ ten-year lifetime, but that could lead to weird behavior when Tor
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+ was started with a grossly inaccurate clock. Mitigates bug 22466;
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+ mitigation on 0.3.0.1-alpha.
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+
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+ o Minor bugfixes (memory leak, directory authority, backport from
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+ 0.3.1.2-alpha):
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+ - When directory authorities reject a router descriptor due to
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+ keypinning, free the router descriptor rather than leaking the
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+ memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
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+
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+
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+Changes in version 0.2.9.11 - 2017-06-08
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+ Tor 0.2.9.11 fixes a pair of bugs that would allow an attacker to
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+ remotely crash a hidden service with an assertion failure. Anyone
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+ running a hidden service should upgrade to this version, or to some
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+ other version with fixes for TROVE-2017-004 and TROVE-2017-005.
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+
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+ Tor 0.2.9.11 also backports fixes for several key management bugs
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+ that sometimes made relays unreliable, as well as several other
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+ bugfixes described below.
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+
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+ o Major bugfixes (hidden service, relay, security, backport
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+ from 0.3.1.3-alpha):
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+ - Fix a remotely triggerable assertion failure caused by receiving a
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+ BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
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+ 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
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+ on 0.2.2.1-alpha.
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+
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+ o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
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+ - When performing the v3 link handshake on a TLS connection, report
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+ that we have the x509 certificate that we actually used on that
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+ connection, even if we have changed certificates since that
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+ connection was first opened. Previously, we would claim to have
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+ used our most recent x509 link certificate, which would sometimes
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+ make the link handshake fail. Fixes one case of bug 22460; bugfix
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+ on 0.2.3.6-alpha.
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+
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+ o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
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+ - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
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+ December 2016 (of which ~126 were still functional) with a list of
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+ 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
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+ 2017. Resolves ticket 21564.
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+
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+ o Minor features (future-proofing, backport from 0.3.0.7):
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+ - Tor no longer refuses to download microdescriptors or descriptors if
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+ they are listed as "published in the future". This change will
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+ eventually allow us to stop listing meaningful "published" dates
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+ in microdescriptor consensuses, and thereby allow us to reduce the
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+ resources required to download consensus diffs by over 50%.
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+ Implements part of ticket 21642; implements part of proposal 275.
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+
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+ o Minor features (directory authorities, backport from 0.3.0.4-rc)
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+ - Directory authorities now reject relays running versions
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+ 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
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+ suffer from bug 20499 and don't keep their consensus cache
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+ up-to-date. Resolves ticket 20509.
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+
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+ o Minor features (geoip):
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+ - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
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+ Country database.
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+
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+ o Minor bugfixes (control port, backport from 0.3.0.6):
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+ - The GETINFO extra-info/digest/<digest> command was broken because
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+ of a wrong base16 decode return value check, introduced when
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+ refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
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+
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+ o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
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+ - Avoid undefined behavior when parsing IPv6 entries from the geoip6
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+ file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
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+
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+ o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.0.7):
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+ - The getpid() system call is now permitted under the Linux seccomp2
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+ sandbox, to avoid crashing with versions of OpenSSL (and other
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+ libraries) that attempt to learn the process's PID by using the
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+ syscall rather than the VDSO code. Fixes bug 21943; bugfix
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+ on 0.2.5.1-alpha.
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+
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+ o Minor bugfixes (memory leak, directory authority, backport
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+ from 0.3.1.2-alpha):
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+ - When directory authorities reject a router descriptor due to
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+ keypinning, free the router descriptor rather than leaking the
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+ memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
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+
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Changes in version 0.3.0.7 - 2017-05-15
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Tor 0.3.0.7 fixes a medium-severity security bug in earlier versions
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Nick Mathewson