Mozilla Firefox before 22.0 does not properly implement certain DocShell inheritance behavior for the sandbox attribute of an IFRAME element, which allows remote attackers to bypass intended access restrictions via a FRAME element within an IFRAME element.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16433
https://bugzilla.mozilla.org/show_bug.cgi?id=849791
http://www.ubuntu.com/usn/USN-1890-1
http://www.mozilla.org/security/announce/2013/mfsa2013-57.html
http://lists.opensuse.org/opensuse-security-announce/2013-07/msg00005.html
http://lists.opensuse.org/opensuse-security-announce/2013-07/msg00003.html