Mozilla Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbird before 16.0, Thunderbird ESR 10.x before 10.0.8, and SeaMonkey before 2.13 do not properly manage a certain insPos variable, which allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption and assertion failure) via unspecified vectors.

References

• https://nvd.nist.gov/vuln/detail/CVE-2012-4187
• https://bugzilla.mozilla.org/show_bug.cgi?id=787493
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16425
• http://lists.opensuse.org/opensuse-security-announce/2012-10/msg00010.html
• http://rhn.redhat.com/errata/RHSA-2012-1351.html
• http://secunia.com/advisories/50856
• http://secunia.com/advisories/50892
• http://secunia.com/advisories/50904
• http://secunia.com/advisories/50935
• http://secunia.com/advisories/50936
• http://secunia.com/advisories/50984
• http://secunia.com/advisories/55318
• http://www.mandriva.com/security/advisories?name=MDVSA-2012:163
• http://www.mozilla.org/security/announce/2012/mfsa2012-86.html
• http://www.securityfocus.com/bid/56125
• http://www.ubuntu.com/usn/USN-1611-1