Synopsis:    Critical: firefox security and bug fix update
Issue Date:  2011-06-21
CVE Numbers: CVE-2011-2364
              CVE-2011-2373
              CVE-2011-2371
              CVE-2011-0083
              CVE-2011-2362
              CVE-2011-2377


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 malformed JPEG images. A
website containing a malicious JPEG image could cause Firefox to crash 
or, potentially, execute arbitrary code with the privileges of the user 
running Firefox. (CVE-2011-2377)

Multiple dangling pointer flaws were found in Firefox. 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-2011-0083, CVE-2011-0085, CVE-2011-2363)

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-2011-2364, CVE-2011-2365, CVE-2011-2374, 
CVE-2011-2375, CVE-2011-2376)

An integer overflow flaw was found in the way Firefox handled JavaScript
Array objects. A website containing malicious JavaScript could cause
Firefox to execute that JavaScript with the privileges of the user 
running Firefox. (CVE-2011-2371)

A use-after-free flaw was found in the way Firefox handled malformed
JavaScript. A website containing malicious JavaScript could cause 
Firefox to execute that JavaScript with the privileges of the user 
running Firefox. (CVE-2011-2373)

It was found that Firefox could treat two separate cookies as
interchangeable if both were for the same domain name but one of those
domain names had a trailing "." character. This violates the same-origin
policy and could possibly lead to data being leaked to the wrong domain.
(CVE-2011-2362)

For technical details regarding these flaws, refer to the Mozilla 
security advisories for Firefox 3.6.18. You can find a link to the 
Mozilla advisories in the References section of this erratum.

This update also fixes the following bug:

* With previous versions of Firefox on Scientific Linux 5, the
"background-repeat" CSS (Cascading Style Sheets) property did not work
(such images were not displayed and repeated as expected).

All Firefox users should upgrade to these updated packages, which 
contain Firefox version 3.6.18, which corrects these issues. After 
installing the update, Firefox must be restarted for the changes to take 
effect.

SL4:
   i386
      firefox-3.6.18-2.el4.i386.rpm
   x86_64
      firefox-3.6.18-2.el4.x86_64.rpm
SL5:
   i386
      firefox-3.6.18-1.el5_6.i386.rpm
      xulrunner-1.9.2.18-2.el5_6.i386.rpm
      xulrunner-devel-1.9.2.18-2.el5_6.i386.rpm
   x86_64
      firefox-3.6.18-1.el5_6.i386.rpm
      firefox-3.6.18-1.el5_6.x86_64.rpm
      xulrunner-1.9.2.18-2.el5_6.i386.rpm
      xulrunner-1.9.2.18-2.el5_6.x86_64.rpm
      xulrunner-devel-1.9.2.18-2.el5_6.i386.rpm
      xulrunner-devel-1.9.2.18-2.el5_6.x86_64.rpm
SL6:
   i386
      firefox-3.6.18-1.el6_1.i686.rpm
      xulrunner-1.9.2.18-2.el6_1.i686.rpm
      xulrunner-devel-1.9.2.18-2.el6_1.i686.rpm
   x86_64
      firefox-3.6.18-1.el6_1.i686.rpm
      firefox-3.6.18-1.el6_1.x86_64.rpm
      xulrunner-1.9.2.18-2.el6_1.i686.rpm
      xulrunner-1.9.2.18-2.el6_1.x86_64.rpm
      xulrunner-devel-1.9.2.18-2.el6_1.i686.rpm
      xulrunner-devel-1.9.2.18-2.el6_1.x86_64.rpm

- Scientific Linux Development Team