Mozilla Firefox before 19.0, Thunderbird before 17.0.3, and SeaMonkey before 2.16 do not prevent multiple wrapping of WebIDL objects, which allows remote attackers to bypass intended access restrictions via unspecified vectors.
lists.opensuse.org/opensuse-security-announce/2013-02/msg00017.html
lists.opensuse.org/opensuse-updates/2013-02/msg00062.html
www.mozilla.org/security/announce/2013/mfsa2013-23.html
www.ubuntu.com/usn/USN-1729-1
www.ubuntu.com/usn/USN-1729-2
bugzilla.mozilla.org/show_bug.cgi?id=830614
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17097