A new security update has been released for Gentoo Linux - Mozilla Thunderbird: Multiple vulnerabilities. Here the announcement:

Gentoo Linux Security Advisory GLSA 200711-24
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http://security.gentoo.org/
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Severity: Normal
Title: Mozilla Thunderbird: Multiple vulnerabilities
Date: November 18, 2007
Bugs: #196481
ID: 200711-24

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Synopsis
========

Multiple vulnerabilities have been reported in Mozilla Thunderbird,
which may allow user-assisted arbitrary remote code execution.

Background
==========

Mozilla Thunderbird is a popular open-source email client from the
Mozilla project.

Affected packages
=================

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 mozilla-thunderbird < 2.0.0.9 >= 2.0.0.9
2 mozilla-thunderbird-bin < 2.0.0.9 >= 2.0.0.9
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2 affected packages on all of their supported architectures.
-------------------------------------------------------------------

Description
===========

Multiple vulnerabilities have been reported in Mozilla Thunderbird's
HTML browser engine (CVE-2007-5339) and JavaScript engine
(CVE-2007-5340) that can be exploited to cause a memory corruption.

Impact
======

A remote attacker could entice a user to read a specially crafted email
that could trigger one of the vulnerabilities, possibly leading to the
execution of arbitrary code.

Workaround
==========

There is no known workaround at this time for all of these issues, but
some of them can be avoided by disabling JavaScript.

Resolution
==========

All Mozilla Thunderbird users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose
">=mail-client/mozilla-thunderbird-2.0.0.9"

All Mozilla Thunderbird binary users should upgrade to the latest
version:

# emerge --sync
# emerge --ask --oneshot --verbose
">=mail-client/mozilla-thunderbird-bin-2.0.0.9"

References
==========

[ 1 ] CVE-2007-5339
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5339
[ 2 ] CVE-2007-5340
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5340
[ 3 ] GLSA 200711-14
http://www.gentoo.org/security/en/glsa/glsa-200711-14.xml

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200711-24.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2007 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5