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@@ -1,11 +1,28 @@
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Changes in version 0.3.3.3-alpha - 2018-03-??
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Tor 0.3.3.3-alpha is the third alpha release for the 0.3.3.x series.
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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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(TROVE BLURB HERE.)
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Additionally, with this release, we are upgrading the severity of a
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bug fixed in 0.3.3.2-alpha. Bug 24700, which was fixed in
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0.3.3.2-alpha, can be remotely triggered in order to crash relays with
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a use-after-free pattern. As such, we are now tracking that bug as
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TROVE-2018-002 and CVE-2018-0491. This bug affected versions
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0.3.2.1-alpha through 0.3.2.9, as well as 0.3.3.1-alpha.
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Additionally, it fixes several minor bugs and annoyances from
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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 one of the versions released today.
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o Major bugfixes (denial-of-service, directory authority):
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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 Minor features (compatibility, OpenSSL):
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- Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
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Previous versions of Tor would not have worked with OpenSSL 1.1.1,
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@@ -21,6 +38,14 @@ Changes in version 0.3.3.3-alpha - 2018-03-??
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- Add a "make test-rust" target to run the rust tests only. Closes
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ticket 25071.
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o Minor bugfixes (denial-of-service):
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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 bugfixes (DoS mitigation):
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- Add extra safety checks when refilling the circuit creation bucket
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to ensure we never set a value above the allowed maximum burst.
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@@ -41,6 +66,12 @@ Changes in version 0.3.3.3-alpha - 2018-03-??
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concurrent learning circuits to 10. Fixes bug 24769; bugfix
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on 0.3.1.1-alpha.
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o Minor bugfixes (spec conformance):
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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 Code simplification and refactoring:
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- Update the "rust dependencies" submodule to be a project-level
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repository, rather than a user repository. Closes ticket 25323.
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Nick Mathewson