CVE-2009-2470: Mozilla Firefox

Medium severity, CVSS 5.0. EPSS: 2% chance of exploitation in the next 30 days.

Mozilla Firefox before 3.0.12, and 3.5.x before 3.5.2, allows remote SOCKS5 proxy servers to cause a denial of service (data stream corruption) via a long domain name in a reply.

Affected products

• Mozilla Firefox: up to and including 3.5.1; version 0.1 only; version 0.2 only; version 0.3 only; version 0.4 only; version 0.5 only; …

Published 2009-08-04. Last modified 2026-06-16.