Mozilla Firefox before 16.0.1, Firefox ESR 10.x before 10.0.9, Thunderbird before 16.0.1, Thunderbird ESR 10.x before 10.0.9, and SeaMonkey before 2.13.1 omit a security check in the defaultValue function during the unwrapping of security wrappers, which allows remote attackers to bypass the Same Origin Policy and read the properties of a Location object, or execute arbitrary JavaScript code, via a crafted web site.

References

• https://nvd.nist.gov/vuln/detail/CVE-2012-4193
• https://bugzilla.mozilla.org/show_bug.cgi?id=720619
• https://exchange.xforce.ibmcloud.com/vulnerabilities/79211
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16786
• http://lists.opensuse.org/opensuse-security-announce/2012-10/msg00010.html
• http://rhn.redhat.com/errata/RHSA-2012-1361.html
• http://rhn.redhat.com/errata/RHSA-2012-1362.html
• http://secunia.com/advisories/50904
• http://secunia.com/advisories/50906
• http://secunia.com/advisories/50907
• http://secunia.com/advisories/50964
• http://secunia.com/advisories/50984
• http://secunia.com/advisories/55318
• http://www.mozilla.org/security/announce/2012/mfsa2012-89.html
• http://www.ubuntu.com/usn/USN-1611-1