RHSA-2010:0809 - Security Advisory

Topic

Updated xulrunner packages that fix one security issue are now available
for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having critical
security impact. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available from the CVE link in
the References section.

Description

XULRunner provides the XUL Runtime environment for applications using the
Gecko layout engine.

A race condition flaw was found in the way XULRunner handled Document
Object Model (DOM) element properties. Malicious HTML content could cause
an application linked against XULRunner (such as Firefox) to crash or,
potentially, execute arbitrary code with the privileges of the user running
the application. (CVE-2010-3765)

For technical details regarding this flaw, refer to the Mozilla security
advisories for Firefox 3.6.12. You can find a link to the Mozilla
advisories in the References section of this erratum.

All XULRunner users should upgrade to these updated packages, which contain
a backported patch to correct this issue. After installing the update,
applications using XULRunner must be restarted for the changes to take
effect.

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
http://kbase.redhat.com/faq/docs/DOC-11259

Affected Products

• Red Hat Enterprise Linux Server 5 x86_64
• Red Hat Enterprise Linux Server 5 ia64
• Red Hat Enterprise Linux Server 5 i386
• Red Hat Enterprise Linux Workstation 5 x86_64
• Red Hat Enterprise Linux Workstation 5 i386
• Red Hat Enterprise Linux Desktop 5 x86_64
• Red Hat Enterprise Linux Desktop 5 i386
• Red Hat Enterprise Linux for IBM z Systems 5 s390x
• Red Hat Enterprise Linux for Power, big endian 5 ppc
• Red Hat Enterprise Linux Server from RHUI 5 x86_64
• Red Hat Enterprise Linux Server from RHUI 5 i386

Fixes

• BZ - 646997 - CVE-2010-3765 Firefox race condition flaw (MFSA 2010-73)

CVEs

• CVE-2010-3765

References

• http://www.redhat.com/security/updates/classification/#critical
• http://www.mozilla.org/security/known-vulnerabilities/firefox36.html#firefox3.6.12