What’s Vulnerable › Vulnerabilities
CVE-2012-3963
- Severity: critical (CVSS 10.0 v2.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 5.9% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2012-08-29 · updated 2026-06-16
- Weakness: CWE-416
Description
Use-after-free vulnerability in the js::gc::MapAllocToTraceKind function in Mozilla Firefox before 15.0, Firefox ESR 10.x before 10.0.7, Thunderbird before 15.0, Thunderbird ESR 10.x before 10.0.7, and SeaMonkey before 2.12 allows remote attackers to execute arbitrary code via unspecified vectors.
Affected products
- Canonical Ubuntu Linux: 10.04, 11.04, 11.10, 12.04
- Mozilla Firefox: before 15.0; from 10.0 before 10.0.7 — fixed in 10.0.7, 15.0
- Mozilla Seamonkey: before 2.12 — fixed in 2.12
- Mozilla Thunderbird: before 15.0 — fixed in 15.0
- Mozilla Thunderbird ESR: from 10.0 before 10.0.7 — fixed in 10.0.7
- Opensuse: 12.2
- RedHat Enterprise Linux Desktop: 5.0, 6.0
- RedHat Enterprise Linux Eus: 6.3
- RedHat Enterprise Linux Server: 5.0, 6.0
- RedHat Enterprise Linux Server Eus: 6.3
- RedHat Enterprise Linux Workstation: 5.0, 6.0
- SUSE Linux Enterprise Server 15 SP1: 10-sp4, 11-sp2
- SUSE Linux Enterprise Server: 10-sp4, 11-sp2
- SUSE Linux Enterprise Software Development Kit: 11-sp2
How to fix
Upgrade to a fixed version: Mozilla Firefox 10.0.7, 15.0; Mozilla Seamonkey 2.12; Mozilla Thunderbird 15.0; Mozilla Thunderbird ESR 10.0.7. Check the vendor advisory for mitigations.
References
- http://lists.opensuse.org/opensuse-security-announce/2012-08/msg00028.html
- http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00011.html
- http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00014.html
- http://rhn.redhat.com/errata/RHSA-2012-1210.html
- http://rhn.redhat.com/errata/RHSA-2012-1211.html
- http://www.mozilla.org/security/announce/2012/mfsa2012-58.html
- http://www.securityfocus.com/bid/55340
- http://www.ubuntu.com/usn/USN-1548-1
- http://www.ubuntu.com/usn/USN-1548-2
- http://www.xerox.com/download/security/security-bulletin/16287-4d6b7b0c81f7b/cert_XRX13-003_v1.0.pdf
- https://bugzilla.mozilla.org/show_bug.cgi?id=762280
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16437
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