What’s Vulnerable › Vulnerabilities

CVE-2013-5596

• Severity: medium (CVSS 6.8 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2013-10-30 · updated 2026-06-16
• Weakness: CWE-119

Description

The cycle collection (CC) implementation in Mozilla Firefox before 25.0, Firefox ESR 24.x before 24.1, Thunderbird before 24.1, and SeaMonkey before 2.22 does not properly determine the thread for release of an image object, which allows remote attackers to execute arbitrary code or cause a denial of service (race condition and application crash) via a large HTML document containing IMG elements, as demonstrated by the Never-Ending Reddit on reddit.com.

Affected products

• Mozilla Firefox: through 24.0; 24.0, 24.0.1, 24.0.2, 19.0, 19.0.1, 19.0.2 (+6)
• Mozilla Seamonkey: through 2.22; 2.0, 2.0-alpha_1, 2.0-alpha_2, 2.0-alpha_3, 2.0-beta_1, 2.0-beta_2 (+97)
• Mozilla Thunderbird: through 24.0.1; 17.0, 17.0.1, 17.0.2, 17.0.3, 17.0.4, 17.0.5 (+4)
• Mozilla Thunderbird ESR: 17.0.9

References

• http://lists.opensuse.org/opensuse-security-announce/2013-11/msg00005.html
• http://lists.opensuse.org/opensuse-security-announce/2013-11/msg00006.html
• http://www.mozilla.org/security/announce/2013/mfsa2013-97.html
• https://bugzilla.mozilla.org/show_bug.cgi?id=910881
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A19066
• https://security.gentoo.org/glsa/201504-01
• http://lists.opensuse.org/opensuse-security-announce/2013-11/msg00005.html
• http://lists.opensuse.org/opensuse-security-announce/2013-11/msg00006.html
• http://www.mozilla.org/security/announce/2013/mfsa2013-97.html
• https://bugzilla.mozilla.org/show_bug.cgi?id=910881
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A19066
• https://security.gentoo.org/glsa/201504-01

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