CVE-2011-2991

Severity: critical (CVSS 10.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2011-08-18 · updated 2026-06-16
Weakness: CWE-119

Description

The browser engine in Mozilla Firefox 4.x through 5, SeaMonkey 2.x before 2.3, Thunderbird before 6, and possibly other products does not properly implement JavaScript, which allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unspecified vectors.

Affected products

Mozilla Firefox: 4.0, 4.0-beta1, 4.0-beta10, 4.0-beta11, 4.0-beta12, 4.0-beta2 (+9)
Mozilla Seamonkey: 2.0, 2.0-alpha_1, 2.0-alpha_2, 2.0-alpha_3, 2.0-beta_1, 2.0-beta_2 (+29)
Mozilla Thunderbird: through 5.0; 0.1, 0.2, 0.3, 0.4, 0.5, 0.6 (+75)

References

http://lists.opensuse.org/opensuse-security-announce/2011-08/msg00023.html
http://secunia.com/advisories/49055
http://www.mozilla.org/security/announce/2011/mfsa2011-29.html
http://www.mozilla.org/security/announce/2011/mfsa2011-31.html
http://www.mozilla.org/security/announce/2011/mfsa2011-33.html
https://bugzilla.mozilla.org/show_bug.cgi?id=655660
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14303
http://lists.opensuse.org/opensuse-security-announce/2011-08/msg00023.html
http://secunia.com/advisories/49055
http://www.mozilla.org/security/announce/2011/mfsa2011-29.html
http://www.mozilla.org/security/announce/2011/mfsa2011-31.html
http://www.mozilla.org/security/announce/2011/mfsa2011-33.html

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