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copy changelog and releasenotes forward from 0.2.9, 0.3.0

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150
ChangeLog
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@ -87,6 +87,156 @@ Changes in version 0.3.1.3-alpha - 2017-06-08
- Clarify the manpage for the (deprecated) torify script. Closes
ticket 6892.
Changes in version 0.3.0.8 - 2017-06-08
Tor 0.3.0.8 fixes a pair of bugs that would allow an attacker to
remotely crash a hidden service with an assertion failure. Anyone
running a hidden service should upgrade to this version, or to some
other version with fixes for TROVE-2017-004 and TROVE-2017-005.
Tor 0.3.0.8 also includes fixes for several key management bugs
that sometimes made relays unreliable, as well as several other
bugfixes described below.
o Major bugfixes (hidden service, relay, security, backport
from 0.3.1.3-alpha):
- Fix a remotely triggerable assertion failure when a hidden service
handles a malformed BEGIN cell. Fixes bug 22493, tracked as
TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
- Fix a remotely triggerable assertion failure caused by receiving a
BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
on 0.2.2.1-alpha.
o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
- When performing the v3 link handshake on a TLS connection, report
that we have the x509 certificate that we actually used on that
connection, even if we have changed certificates since that
connection was first opened. Previously, we would claim to have
used our most recent x509 link certificate, which would sometimes
make the link handshake fail. Fixes one case of bug 22460; bugfix
on 0.2.3.6-alpha.
o Major bugfixes (relays, key management, backport from 0.3.1.3-alpha):
- Regenerate link and authentication certificates whenever the key
that signs them changes; also, regenerate link certificates
whenever the signed key changes. Previously, these processes were
only weakly coupled, and we relays could (for minutes to hours)
wind up with an inconsistent set of keys and certificates, which
other relays would not accept. Fixes two cases of bug 22460;
bugfix on 0.3.0.1-alpha.
- When sending an Ed25519 signing->link certificate in a CERTS cell,
send the certificate that matches the x509 certificate that we
used on the TLS connection. Previously, there was a race condition
if the TLS context rotated after we began the TLS handshake but
before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
on 0.3.0.1-alpha.
o Major bugfixes (hidden service v3, backport from 0.3.1.1-alpha):
- Stop rejecting v3 hidden service descriptors because their size
did not match an old padding rule. Fixes bug 22447; bugfix on
tor-0.3.0.1-alpha.
o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
- Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
December 2016 (of which ~126 were still functional) with a list of
151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
2017. Resolves ticket 21564.
o Minor bugfixes (configuration, backport from 0.3.1.1-alpha):
- Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
bug 22252; bugfix on 0.2.9.3-alpha.
o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
- Avoid undefined behavior when parsing IPv6 entries from the geoip6
file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
o Minor bugfixes (link handshake, backport from 0.3.1.3-alpha):
- Lower the lifetime of the RSA->Ed25519 cross-certificate to six
months, and regenerate it when it is within one month of expiring.
Previously, we had generated this certificate at startup with a
ten-year lifetime, but that could lead to weird behavior when Tor
was started with a grossly inaccurate clock. Mitigates bug 22466;
mitigation on 0.3.0.1-alpha.
o Minor bugfixes (memory leak, directory authority, backport from
0.3.1.2-alpha):
- When directory authorities reject a router descriptor due to
keypinning, free the router descriptor rather than leaking the
memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
Changes in version 0.2.9.11 - 2017-06-08
Tor 0.2.9.11 fixes a pair of bugs that would allow an attacker to
remotely crash a hidden service with an assertion failure. Anyone
running a hidden service should upgrade to this version, or to some
other version with fixes for TROVE-2017-004 and TROVE-2017-005.
Tor 0.2.9.11 also backports fixes for several key management bugs
that sometimes made relays unreliable, as well as several other
bugfixes described below.
o Major bugfixes (hidden service, relay, security, backport
from 0.3.1.3-alpha):
- Fix a remotely triggerable assertion failure caused by receiving a
BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
on 0.2.2.1-alpha.
o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
- When performing the v3 link handshake on a TLS connection, report
that we have the x509 certificate that we actually used on that
connection, even if we have changed certificates since that
connection was first opened. Previously, we would claim to have
used our most recent x509 link certificate, which would sometimes
make the link handshake fail. Fixes one case of bug 22460; bugfix
on 0.2.3.6-alpha.
o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
- Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
December 2016 (of which ~126 were still functional) with a list of
151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
2017. Resolves ticket 21564.
o Minor features (future-proofing, backport from 0.3.0.7):
- Tor no longer refuses to download microdescriptors or descriptors if
they are listed as "published in the future". This change will
eventually allow us to stop listing meaningful "published" dates
in microdescriptor consensuses, and thereby allow us to reduce the
resources required to download consensus diffs by over 50%.
Implements part of ticket 21642; implements part of proposal 275.
o Minor features (directory authorities, backport from 0.3.0.4-rc)
- Directory authorities now reject relays running versions
0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
suffer from bug 20499 and don't keep their consensus cache
up-to-date. Resolves ticket 20509.
o Minor features (geoip):
- Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
Country database.
o Minor bugfixes (control port, backport from 0.3.0.6):
- The GETINFO extra-info/digest/<digest> command was broken because
of a wrong base16 decode return value check, introduced when
refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
- Avoid undefined behavior when parsing IPv6 entries from the geoip6
file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.0.7):
- The getpid() system call is now permitted under the Linux seccomp2
sandbox, to avoid crashing with versions of OpenSSL (and other
libraries) that attempt to learn the process's PID by using the
syscall rather than the VDSO code. Fixes bug 21943; bugfix
on 0.2.5.1-alpha.
o Minor bugfixes (memory leak, directory authority, backport
from 0.3.1.2-alpha):
- When directory authorities reject a router descriptor due to
keypinning, free the router descriptor rather than leaking the
memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
Changes in version 0.3.1.2-alpha - 2017-05-26
Tor 0.3.1.2-alpha is the second release in the 0.3.1.x series. It

150
ReleaseNotes
View File

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