Critical: firefox security update
Security Advisory: Critical
Updated firefox packages that fix multiple security issues are now
available for Red Hat Enterprise Linux 4, 5, and 6.
The Red Hat Security Response Team has rated this update as having critical
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.
Mozilla Firefox is an open source web browser. XULRunner provides the XUL
Runtime environment for Mozilla Firefox.
A use-after-free flaw was found in the way Firefox removed nsDOMAttribute
child nodes. In certain circumstances, due to the premature notification
of AttributeChildRemoved, a malicious script could possibly use this flaw
to cause Firefox to crash or, potentially, execute arbitrary code with the
privileges of the user running Firefox. (CVE-2011-3659)
Several flaws were found in the processing of malformed web content. A web
page containing malicious content could cause Firefox to crash or,
potentially, execute arbitrary code with the privileges of the user running
Firefox. (CVE-2012-0442)
A flaw was found in the way Firefox parsed Ogg Vorbis media files. A web
page containing a malicious Ogg Vorbis media file could cause Firefox to
crash or, potentially, execute arbitrary code with the privileges of the
user running Firefox. (CVE-2012-0444)
A flaw was found in the way Firefox parsed certain Scalable Vector Graphics
(SVG) image files that contained eXtensible Style Sheet Language
Transformations (XSLT). A web page containing a malicious SVG image file
could cause Firefox to crash or, potentially, execute arbitrary code with
the privileges of the user running Firefox. (CVE-2012-0449)
The same-origin policy in Firefox treated http://example.com and
http://[example.com] as interchangeable. A malicious script could possibly
use this flaw to gain access to sensitive information (such as a client's
IP and user e-mail address, or httpOnly cookies) that may be included in
HTTP proxy error replies, generated in response to invalid URLs using
square brackets. (CVE-2011-3670)
For technical details regarding these flaws, refer to the Mozilla security
advisories for Firefox 3.6.26. 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 3.6.26, which corrects these issues. After installing the
update, Firefox must be restarted for the changes to take effect.
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
https://access.redhat.com/kb/docs/DOC-11259
Vulmon