iceweasel - several

Several vulnerabilities have been discovered in Iceweasel, a web browser
based on Firefox. The included XULRunner library provides rendering
services for several other applications included in Debian.

• CVE-2012-0455
  Soroush Dalili discovered that a cross-site scripting countermeasure
  related to JavaScript URLs could be bypassed.
• CVE-2012-0456
  Atte Kettunen discovered an out of bounds read in the SVG Filters,
  resulting in memory disclosure.
• CVE-2012-0458
  Mariusz Mlynski discovered that privileges could be escalated through
  a JavaScript URL as the home page.
• CVE-2012-0461
  Bob Clary discovered memory corruption bugs, which may lead to the
  execution of arbitrary code.

For the stable distribution (squeeze), this problem has been fixed in
version 3.5.16-13.

For the unstable distribution (sid), this problem has been fixed in
version 10.0.3esr-1.

For the experimental distribution, this problem has been fixed in
version 11.0-1.

We recommend that you upgrade your iceweasel packages.