(RHSA-2012:0715) Critical: thunderbird security update

Mozilla Thunderbird is a standalone mail and newsgroup client.

Several flaws were found in the processing of malformed content. Malicious
content could cause Thunderbird to crash or, potentially, execute arbitrary
code with the privileges of the user running Thunderbird. (CVE-2011-3101,
CVE-2012-1937, CVE-2012-1938, CVE-2012-1939, CVE-2012-1940, CVE-2012-1941,
CVE-2012-1946, CVE-2012-1947)

Note: CVE-2011-3101 only affected users of certain NVIDIA display drivers
with graphics cards that have hardware acceleration enabled.

It was found that the Content Security Policy (CSP) implementation in
Thunderbird no longer blocked Thunderbird inline event handlers. Malicious
content could possibly bypass intended restrictions if that content relied
on CSP to protect against flaws such as cross-site scripting (XSS).
(CVE-2012-1944)

If a web server hosted content that is stored on a Microsoft Windows share,
or a Samba share, loading such content with Thunderbird could result in
Windows shortcut files (.lnk) in the same share also being loaded. An
attacker could use this flaw to view the contents of local files and
directories on the victim’s system. This issue also affected users opening
content from Microsoft Windows shares, or Samba shares, that are mounted
on their systems. (CVE-2012-1945)

Red Hat would like to thank the Mozilla project for reporting these issues.
Upstream acknowledges Ken Russell of Google as the original reporter of
CVE-2011-3101; Igor Bukanov, Olli Pettay, Boris Zbarsky, and Jesse Ruderman
as the original reporters of CVE-2012-1937; Jesse Ruderman, Igor Bukanov,
Bill McCloskey, Christian Holler, Andrew McCreight, and Brian Bondy as the
original reporters of CVE-2012-1938; Christian Holler as the original
reporter of CVE-2012-1939; security researcher Abhishek Arya of Google as
the original reporter of CVE-2012-1940, CVE-2012-1941, and CVE-2012-1947;
security researcher Arthur Gerkis as the original reporter of
CVE-2012-1946; security researcher Adam Barth as the original reporter of
CVE-2012-1944; and security researcher Paul Stone as the original reporter
of CVE-2012-1945.

Note: None of the issues in this advisory can be exploited by a
specially-crafted HTML mail message as JavaScript is disabled by default
for mail messages. They could be exploited another way in Thunderbird, for
example, when viewing the full remote content of an RSS feed.

All Thunderbird users should upgrade to this updated package, which
contains Thunderbird version 10.0.5 ESR, which corrects these issues. After
installing the update, Thunderbird must be restarted for the changes to
take effect.