firefox, xulrunner security update

CentOS Errata and Security Advisory CESA-2011:1437

Mozilla Firefox is an open source web browser. XULRunner provides the XUL
Runtime environment for Mozilla Firefox.

A flaw was found in the way Firefox handled certain add-ons. A web page
containing malicious content could cause an add-on to grant itself full
browser privileges, which could lead to arbitrary code execution with the
privileges of the user running Firefox. (CVE-2011-3647)

A cross-site scripting (XSS) flaw was found in the way Firefox handled
certain multibyte character sets. A web page containing malicious content
could cause Firefox to run JavaScript code with the permissions of a
different website. (CVE-2011-3648)

A flaw was found in the way Firefox handled large JavaScript scripts. A web
page containing malicious JavaScript could cause Firefox to crash or,
potentially, execute arbitrary code with the privileges of the user running
Firefox. (CVE-2011-3650)

For technical details regarding these flaws, refer to the Mozilla security
advisories for Firefox 3.6.24. You can find a link to the Mozilla
advisories in the References section of this erratum.

All Firefox users should upgrade to these updated packages, which contain
Firefox version 3.6.24, which corrects these issues. After installing the
update, Firefox must be restarted for the changes to take effect.

Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2011-November/080341.html
https://lists.centos.org/pipermail/centos-announce/2011-November/080342.html
https://lists.centos.org/pipermail/centos-announce/2011-November/080349.html
https://lists.centos.org/pipermail/centos-announce/2011-November/080350.html

Affected packages:
firefox
xulrunner
xulrunner-devel

Upstream details at:
https://access.redhat.com/errata/RHSA-2011:1437