An updated thunderbird package that fixes several security issues is now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores,

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====================================================================                   Red Hat Security Advisory

Synopsis:          Moderate: thunderbird security update
Advisory ID:       RHSA-2010:0969-02
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2010:0969.html
Issue date:        2010-12-09
CVE Names:         CVE-2010-3768 CVE-2010-3776 CVE-2010-3777 
====================================================================
1. Summary:

An updated thunderbird package that fixes several security issues is now
available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having moderate
security impact. Common Vulnerability Scoring System (CVSS) base scores,
which give detailed severity ratings, are available for each vulnerability
from the CVE links in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64
Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

3. Description:

Mozilla Thunderbird is a standalone mail and newsgroup client.

Several flaws were found in the processing of malformed HTML content.
Malicious HTML content could cause Thunderbird to crash or, potentially,
execute arbitrary code with the privileges of the user running Thunderbird.
(CVE-2010-3776, CVE-2010-3777)

Note: JavaScript support is disabled in Thunderbird for mail messages. The
above issues are believed to not be exploitable without JavaScript.

This update adds support for the Sanitiser for OpenType (OTS) library to
Thunderbird. This library helps prevent potential exploits in malformed
OpenType fonts by verifying the font file prior to use. (CVE-2010-3768)

All Thunderbird users should upgrade to this updated package, which
resolves these issues. All running instances of Thunderbird must be
restarted for the update to take effect.

4. Solution:

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at

5. Bugs fixed (http://bugzilla.redhat.com/):

660408 - CVE-2010-3776 Mozilla miscellaneous memory safety hazards (MFSA 2010-74)
660415 - CVE-2010-3777 Mozilla miscellaneous memory safety hazards (MFSA 2010-74)
660420 - CVE-2010-3768 Mozilla add support for OTS font sanitizer (MFSA 2010-78)

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:

i386:
thunderbird-3.1.7-3.el6_0.i686.rpm
thunderbird-debuginfo-3.1.7-3.el6_0.i686.rpm

x86_64:
thunderbird-3.1.7-3.el6_0.x86_64.rpm
thunderbird-debuginfo-3.1.7-3.el6_0.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 6):

Source:

i386:
thunderbird-3.1.7-3.el6_0.i686.rpm
thunderbird-debuginfo-3.1.7-3.el6_0.i686.rpm

ppc64:
thunderbird-3.1.7-3.el6_0.ppc64.rpm
thunderbird-debuginfo-3.1.7-3.el6_0.ppc64.rpm

s390x:
thunderbird-3.1.7-3.el6_0.s390x.rpm
thunderbird-debuginfo-3.1.7-3.el6_0.s390x.rpm

x86_64:
thunderbird-3.1.7-3.el6_0.x86_64.rpm
thunderbird-debuginfo-3.1.7-3.el6_0.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:

i386:
thunderbird-3.1.7-3.el6_0.i686.rpm
thunderbird-debuginfo-3.1.7-3.el6_0.i686.rpm

x86_64:
thunderbird-3.1.7-3.el6_0.x86_64.rpm
thunderbird-debuginfo-3.1.7-3.el6_0.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/#package

7. References:

https://access.redhat.com/security/cve/CVE-2010-3768
https://access.redhat.com/security/cve/CVE-2010-3776
https://access.redhat.com/security/cve/CVE-2010-3777
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is .  More contact
details at https://access.redhat.com/security/team/contact

Copyright 2010 Red Hat, Inc.
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