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-2011-3670
  Gregory Fleischer discovered that IPv6 URLs were incorrectly parsed,
  resulting in potential information disclosure.
• CVE-2012-0442
  Jesse Ruderman and Bob Clary discovered memory corruption bugs, which
  may lead to the execution of arbitrary code.
• CVE-2012-0444
  regenrecht discovered that missing input sanitising in the Ogg Vorbis
  parser may lead to the execution of arbitrary code.
• CVE-2012-0449
  Nicolas Gregoire and Aki Helin discovered that missing input
  sanitising in XSLT processing may lead to the execution of arbitrary
  code.

For the oldstable distribution (lenny), this problem has been fixed in
version 1.9.0.19-13 of the xulrunner source package.

For the stable distribution (squeeze), this problem has been fixed in
version 3.5.16-12.

For the unstable distribution (sid), this problem has been fixed in
version 10.0-1.

We recommend that you upgrade your iceweasel packages.