iceweasel - several vulnerabilities

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-2012-1948
  Benoit Jacob, Jesse Ruderman, Christian Holler, and Bill McCloskey
  identified several memory safety problems that may lead to the execution of
  arbitrary code.
• CVE-2012-1950
  Mario Gomes and Code Audit Labs discovered that it is possible to force
  Iceweasel to display the URL of the previous entered site through drag and
  drop actions to the address bar. This can be abused to perform phishing
  attacks.
• CVE-2012-1954
  Abhishek Arya discovered a use-after-free problem in
  nsDocument::AdoptNode that may lead to the execution of arbitrary
  code.
• CVE-2012-1966
  moz_bug_r_a4 discovered that it is possible to perform cross-site
  scripting attacks through the context menu when using data: URLs.
• CVE-2012-1967
  moz_bug_r_a4 discovered that in certain cases, javascript: URLs can
  be executed so that scripts can escape the JavaScript sandbox and run
  with elevated privileges.

Note: We’d like to advise users of Iceweasel’s 3.5 branch in Debian stable to
consider to upgrade to the Iceweasel 10.0 ESR (Extended Support Release) which
is now available in Debian Backports. Although Debian will continue to support
Iceweasel 3.5 in stable with security updates, this can only be done on a best
effort basis as upstream provides no such support anymore. On top of that, the
10.0 branch adds proactive security features to the browser.

For the stable distribution (squeeze), this problem has been fixed in
version 3.5.16-17.

For the unstable distribution (sid), this problem has been fixed in
version 10.0.6esr-1.

We recommend that you upgrade your iceweasel packages.