Quantum Secular Labs / Blog / Advisories

CVE-2012-1951: Mozilla Firefox: Use after free

CVE-2012-1951 has a CVSS v2 base score of 10.0 (the maximum on that scale) and affects Mozilla Firefox. Per its scoring, it can be exploited over the network, without authentication. The scored impact on confidentiality, integrity and availability is the highest available.

Vulnerability description

Use-after-free vulnerability in the nsSMILTimeValueSpec::IsEventBased function in Mozilla Firefox 4.x through 13.0, Firefox ESR 10.x before 10.0.6, Thunderbird 5.0 through 13.0, Thunderbird ESR 10.x before 10.0.6, and SeaMonkey before 2.11 allows remote attackers to cause a denial of service (heap memory corruption) or possibly execute arbitrary code by interacting with objects used for SMIL Timing.

Severity breakdown

CVSS v2.0 10.0: AV:N/AC:L/Au:N/C:C/I:C/A:C

  • Access vector: Network. Exploitable remotely over the network.
  • Access complexity: Low. No special conditions are required.
  • Authentication: None. No authentication is needed.
  • Confidentiality impact: Complete. Total information disclosure.
  • Integrity impact: Complete. Total loss of integrity.
  • Availability impact: Complete. Total shutdown of the component.

Affected products

  • Mozilla Firefox: 4.0; 4.0 beta1; 4.0 beta10; 4.0 beta11; 4.0 beta12; 4.0 beta2; 4.0 beta3; 4.0 beta4; 4.0 beta5; 4.0 beta6; 4.0 beta7; 4.0 beta8
  • Mozilla Thunderbird: 5.0; 6.0; 6.0.1; 6.0.2; 7.0; 7.0.1; 8.0; 9.0; 9.0.1; 10.0; 10.0.1; 10.0.2
  • Mozilla Thunderbird Esr: 10.0; 10.0.1; 10.0.2; 10.0.3; 10.0.4; 10.0.5
  • Mozilla Seamonkey: up to and including 2.10; 1.0; 1.0 alpha; 1.0 beta; 1.0.1; 1.0.2; 1.0.3; 1.0.4; 1.0.5; 1.0.6; 1.0.7; 1.0.8

References