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

Gentoo Linux Security Advisory GLSA 200612-06
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http://security.gentoo.org/
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Severity: High
Title: Mozilla Thunderbird: Multiple vulnerabilities
Date: December 10, 2006
Bugs: #154448
ID: 200612-06

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Synopsis
========

Multiple vulnerabilities have been identified in Mozilla Thunderbird.

Background
==========

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

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 mozilla-thunderbird < 1.5.0.8 >= 1.5.0.8
2 mozilla-thunderbird-bin < 1.5.0.8 >= 1.5.0.8
-------------------------------------------------------------------
2 affected packages on all of their supported architectures.
-------------------------------------------------------------------

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

It has been identified that Mozilla Thunderbird improperly handles
Script objects while they are being executed, allowing them to be
modified during execution. JavaScript is disabled in Mozilla
Thunderbird by default. Mozilla Thunderbird has also been found to be
vulnerable to various potential buffer overflows. Lastly, the binary
release of Mozilla Thunderbird is vulnerable to a low exponent RSA
signature forgery issue because it is bundled with a vulnerable version
of NSS.

Impact
======

An attacker could entice a user to view a specially crafted email that
causes a buffer overflow and again executes arbitrary code or causes a
Denial of Service. An attacker could also entice a user to view an
email containing specially crafted JavaScript and execute arbitrary
code with the rights of the user running Mozilla Thunderbird. It is
important to note that JavaScript is off by default in Mozilla
Thunderbird, and enabling it is strongly discouraged. It is also
possible for an attacker to create SSL/TLS or email certificates that
would not be detected as invalid by the binary release of Mozilla
Thunderbird, raising the possibility for Man-in-the-Middle attacks.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

Users upgrading to the following releases of Mozilla Thunderbird should
note that this version of Mozilla Thunderbird has been found to not
display certain messages in some cases.

</br>

</br> All Mozilla Thunderbird users should upgrade to the latest
version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=mail-client/mozilla-thunderbird=
-1.5.0.8"

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

# emerge --sync
# emerge --ask --oneshot --verbose ">=mail-client/mozilla-thunderbird=
-bin-1.5.0.8"

References
==========

[ 1 ] CVE-2006-5462
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5462
[ 2 ] CVE-2006-5463
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5463
[ 3 ] CVE-2006-5464
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5464
[ 4 ] CVE-2006-5747
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5747
[ 5 ] CVE-2006-5748
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5748
[ 6 ] Mozilla Thunderbird Email Loss Bug
https://bugzilla.mozilla.org/show_bug.cgi?id=360409

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

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

http://security.gentoo.org/glsa/glsa-200612-06.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 2006 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