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@@ -3,7 +3,37 @@ Changes in version 0.3.2.10 - 2018-03-??
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backports a number of bugfixes, including important fixes for security
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issues.
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BLURB HERE.
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It includes an important security fix for a remote crash attack
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against directory authorities, tracked as TROVE-2018-001.
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Additionally, it backports a fix for a bug whose severity we have
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upgraded: Bug 24700, which was fixed in 0.3.3.2-alpha, can be remotely
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triggered in order to crash relays with a use-after-free pattern. As
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such, we are now tracking that bug as TROVE-2018-002 and
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CVE-2018-0491, and backporting it to earlier releases. This bug
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affected versions 0.3.2.1-alpha through 0.3.2.9, as well as version
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0.3.3.1-alpha.
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This release also backports our new system for improved resistance to
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denial-of-service attacks against relays.
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This release also fixes several minor bugs and annoyances from
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earlier releases.
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All directory authorities should upgrade to one of the versions
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released today. All relays not already running Tor 0.3.3.2-alpha or
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later should upgrade to this release.
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o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
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- Fix a protocol-list handling bug that could be used to remotely crash
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directory authorities with a null-pointer exception. Fixes bug 25074;
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bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
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CVE-2018-0490.
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o Major bugfixes (scheduler, KIST, denial-of-service, backport from 0.3.3.2-alpha):
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- Avoid adding the same channel twice in the KIST scheduler pending
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list, which could lead to remote denial-of-service use-after-free
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attacks against relays. Fixes bug 24700; bugfix on 0.3.2.1-alpha.
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o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
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- Give relays some defenses against the recent network overload. We
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@@ -75,6 +105,14 @@ Changes in version 0.3.2.10 - 2018-03-??
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making decisions about how to handle the incoming connection.
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Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
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o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
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- Fix a possible crash on malformed consensus. If a consensus had
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contained an unparseable protocol line, it could have made clients
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and relays crash with a null-pointer exception. To exploit this
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issue, however, an attacker would need to be able to subvert the
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directory authority system. Fixes bug 25251; bugfix on
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0.2.9.4-alpha. Also tracked as TROVE-2018-004.
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o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
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- Directory authorities, when refusing a descriptor from a rejected
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relay, now explicitly tell the relay (in its logs) to set a valid
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@@ -86,17 +124,6 @@ Changes in version 0.3.2.10 - 2018-03-??
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around the issue at https://github.com/rust-lang/rust/issues/46797.
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Fixes bug 24652; bugfix on 0.3.1.1-alpha.
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[[[[ OMIT
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o Minor bugfixes (DoS mitigation):
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- Add extra safety checks when refilling the circuit creation bucket to
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ensure we never set a value that is above the allowed burst. Fixes
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bug 25202; bugfix on 0.3.3.2-alpha.
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- Make sure we don't modify consensus parameters if we aren't a public
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relay when a new consensus arrives. Fixes bug 25223; bugfix on
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0.3.3.2-alpha.
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OMIT]]]]
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o Minor bugfixes (onion services, backport from 0.3.3.2-alpha):
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- Remove a BUG() statement when a client fetches an onion descriptor
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that has a lower revision counter than the one in its cache. This
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@@ -118,10 +145,11 @@ Changes in version 0.3.2.10 - 2018-03-??
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limit (which can happen sometimes on some versions of OSX). Fixes
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bug 21074; bugfix on 0.0.9pre5.
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o Minor bugfixes (scheduler, KIST, backport from 0.3.3.2-alpha):
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- Avoid adding the same channel twice in the KIST scheduler pending
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list, which would waste CPU cycles. Fixes bug 24700; bugfix
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on 0.3.2.1-alpha.
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o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
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- Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
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0.2.9.4-alpha.
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- Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
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bugfix on 0.2.9.4-alpha.
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o Minor bugfixes (testing, backport from 0.3.3.1-alpha):
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- Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
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Nick Mathewson