CVE-2004-2479: National Science Foundation Squid Web Proxy Cache

Medium severity, CVSS 5.0. EPSS: 2.1% chance of exploitation in the next 30 days.

Squid Web Proxy Cache 2.5 might allow remote attackers to obtain sensitive information via URLs containing invalid hostnames that cause DNS operations to fail, which results in references to previously used error messages.

Affected products

• National Science Foundation Squid Web Proxy Cache: version 2.5_stable1 only; version 2.5_stable2 only; version 2.5_stable3 only; version 2.5_stable4 only; version 2.5_stable5 only; version 2.5_stable6 only; …

Published 2004-12-31. Last modified 2026-06-16.