The PreserveWrapper implementation in Mozilla Firefox before 22.0, Firefox ESR 17.x before 17.0.7, Thunderbird before 17.0.7, and Thunderbird ESR 17.x before 17.0.7 does not properly handle the lack of a wrapper, which allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code by leveraging unintended clearing of the wrapper cache's preserved-wrapper flag.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17405
https://bugzilla.mozilla.org/show_bug.cgi?id=848535
http://www.ubuntu.com/usn/USN-1891-1
http://www.ubuntu.com/usn/USN-1890-1
http://www.securityfocus.com/bid/60776
http://www.mozilla.org/security/announce/2013/mfsa2013-56.html
http://www.debian.org/security/2013/dsa-2720
http://www.debian.org/security/2013/dsa-2716
http://rhn.redhat.com/errata/RHSA-2013-0982.html
http://rhn.redhat.com/errata/RHSA-2013-0981.html
http://lists.opensuse.org/opensuse-security-announce/2013-07/msg00006.html
http://lists.opensuse.org/opensuse-security-announce/2013-07/msg00005.html
http://lists.opensuse.org/opensuse-security-announce/2013-07/msg00004.html
http://lists.opensuse.org/opensuse-security-announce/2013-07/msg00003.html