CVE-2013-5607: Mozilla Firefox

High severity, CVSS 7.5. EPSS: 3% chance of exploitation in the next 30 days.

Integer overflow in the PL_ArenaAllocate function in Mozilla Netscape Portable Runtime (NSPR) before 4.10.2, as used in Firefox before 25.0.1, Firefox ESR 17.x before 17.0.11 and 24.x before 24.1.1, and SeaMonkey before 2.22.1, allows remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact via a crafted X.509 certificate, a related issue to CVE-2013-1741.

Affected products

• Mozilla Firefox: version 17.0 only; version 17.0.1 only; version 17.0.2 only; version 17.0.3 only; version 17.0.4 only; version 17.0.5 only; …
• Mozilla Netscape Portable Runtime: up to and including 4.10.1; version 4.1.1 only; version 4.1.2 only; version 4.2 only; version 4.2.2 only; version 4.3 only; …
• Mozilla Seamonkey: up to and including 2.22; version 2.0 only; version 2.0.1 only; version 2.0.2 only; version 2.0.3 only; version 2.0.4 only; …

Published 2013-11-20. Last modified 2026-06-16.