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Ubuntu Security Notice USN-1020-1 December 09, 2010
thunderbird, thunderbird-locales vulnerabilities
CVE-2010-3768, CVE-2010-3776, CVE-2010-3777, CVE-2010-3778
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A security issue affects the following Ubuntu releases:

Ubuntu 10.04 LTS
Ubuntu 10.10

This advisory also applies to the corresponding versions of
Kubuntu, Edubuntu, and Xubuntu.

The problem can be corrected by upgrading your system to the
following package versions:

Ubuntu 10.04 LTS:
thunderbird 3.1.7+build3+nobinonly-0ubuntu0.10.04.1

Ubuntu 10.10:
thunderbird 3.1.7+build3+nobinonly-0ubuntu0.10.10.1

After a standard system update you need to restart Thunderbird to make
all the necessary changes.

Details follow:

Jesse Ruderman, Andreas Gal, Nils, Brian Hackett, and Igor Bukanov
discovered several memory issues in the browser engine. An attacker could
exploit these to crash THunderbird or possibly run arbitrary code as the
user invoking the program. (CVE-2010-3776, CVE-2010-3777, CVE-2010-3778)

Marc Schoenefeld and Christoph Diehl discovered several problems when
handling downloadable fonts. The new OTS font sanitizing library was added
to mitigate these issues. (CVE-2010-3768)