The appendChild function in Mozilla Firefox before 3.6.20, Thunderbird 3.x before 3.1.12, SeaMonkey 2.x, and possibly other products does not properly handle DOM objects, which allows remote attackers to execute arbitrary code via unspecified vectors that lead to dereferencing of a “dangling pointer.”
lists.opensuse.org/opensuse-security-announce/2011-08/msg00023.html
lists.opensuse.org/opensuse-security-announce/2011-08/msg00027.html
www.debian.org/security/2011/dsa-2295
www.debian.org/security/2011/dsa-2296
www.debian.org/security/2011/dsa-2297
www.mandriva.com/security/advisories?name=MDVSA-2011:127
www.mozilla.org/security/announce/2011/mfsa2011-30.html
www.redhat.com/support/errata/RHSA-2011-1164.html
www.redhat.com/support/errata/RHSA-2011-1166.html
bugzilla.mozilla.org/show_bug.cgi?id=648065
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14163