USN-978-1 fixed vulnerabilities in Thunderbird. Some users reported stability problems under certain circumstances. This update fixes the problem.

==========================================================Ubuntu Security Notice USN-978-2         September 16, 2010
thunderbird regression
https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/640839
==========================================================
A security issue affects the following Ubuntu releases:

Ubuntu 10.04 LTS

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                     3.0.8+build2+nobinonly-0ubuntu0.10.04.1

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

Details follow:

USN-978-1 fixed vulnerabilities in Thunderbird. Some users reported
stability problems under certain circumstances. This update fixes the
problem.

We apologize for the inconvenience.

Original advisory details:

 Several dangling pointer vulnerabilities were discovered in Thunderbird. An
 attacker could exploit this to crash Thunderbird or possibly run arbitrary
 code as the user invoking the program. (CVE-2010-2760, CVE-2010-2767,
 CVE-2010-3167)
 
 It was discovered that the XPCSafeJSObjectWrapper (SJOW) security wrapper
 did not always honor the same-origin policy. If JavaScript was enabled, an
 attacker could exploit this to run untrusted JavaScript from other domains.
 (CVE-2010-2763)
 
 Matt Haggard discovered that Thunderbird did not honor same-origin policy
 when processing the statusText property of an XMLHttpRequest object. If a
 user were tricked into viewing a malicious site, a remote attacker could
 use this to gather information about servers on internal private networks.
 (CVE-2010-2764)
 
 Chris Rohlf discovered an integer overflow when Thunderbird processed the
 HTML frameset element. If a user were tricked into viewing a malicious
 site, a remote attacker could use this to crash Thunderbird or possibly run
 arbitrary code as the user invoking the program. (CVE-2010-2765)
 
 Several issues were discovered in the browser engine. If a user were
 tricked into viewing a malicious site, a remote attacker could use this to
 crash Thunderbird or possibly run arbitrary code as the user invoking the
 program. (CVE-2010-2766, CVE-2010-3168)
 
 David Huang and Collin Jackson discovered that the