Start on an 0.3.0.8 changelog
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Nick Mathewson
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69
ChangeLog
69
ChangeLog
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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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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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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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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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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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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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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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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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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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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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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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of Tor 0.3.0.x, where an attacker could cause a Tor relay process to
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o Minor features:
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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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@ -1,3 +0,0 @@
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o Minor bugfixes (configuration):
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- Do not crash when starting with LearnCircuitBuildTimeout 0.
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Fixes bug 22252; bugfix on 0.2.9.3-alpha.
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@ -1,4 +0,0 @@
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o Minor bugfixes (memory handling):
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- When directory authorities reject a router descriptor due to keypinning,
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free the router descriptor rather than leaking the memory.
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Fixes bug 22370; bugfix on 0.2.7.2-alpha.
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@ -1,3 +0,0 @@
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o Major bugfixes (hidden service v3):
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- HSDir failed to validate the encrypted size of a v3 descriptor and thus
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rejecting it. Fixes bug 22447; bugfix on tor-0.3.0.1-alpha.
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@ -1,16 +0,0 @@
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o Major bugfixes (relays, key management):
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- Regenerate link and authentication certificates whenever the key that
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signs them changes; also, regenerate link certificates whenever the
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signed key changes. Previously, these processes were only weakly
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coupled, and we relays could (for minutes to hours) wind up with an
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inconsistent set of keys and certificates, which other relays
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would not accept. Fixes two cases of bug 22460; bugfix on
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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 used
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on the TLS connection. Previously, there was a race condition if
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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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@ -1,8 +0,0 @@
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o Major bugfixes (relay, link handshake):
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- When performing the v3 link handshake on a TLS connection, report that
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we have the x509 certificate that we actually used on that connection,
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even if we have changed certificates since that connection was first
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opened. Previously, we would claim to have used our most recent x509
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link certificate, which would sometimes make the link handshake fail.
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Fixes one case of bug 22460; bugfix on 0.2.3.6-alpha.
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@ -1,8 +0,0 @@
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o Minor bugfixes (link handshake):
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- Lower the lifetime of the RSA->Ed25519 cross-certificate to
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six 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
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a ten-year lifetime, but that could lead to weird behavior when
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Tor was started with a grossly inaccurate clock. Mitigates
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bug 22466; mitigation on 0.3.0.1-alpha.
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@ -1,3 +0,0 @@
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o Minor bugfixes (correctness):
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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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@ -1,6 +0,0 @@
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o Minor features (fallback directory list):
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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 existing, 58 removed) generated in
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May 2017.
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Resolves ticket 21564.
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