CVE-2006-5645: Sophos Anti-Virus

Medium severity, CVSS 5.0. EPSS: 17.9% chance of exploitation in the next 30 days.

Sophos Anti-Virus and Endpoint Security before 6.0.5, Anti-Virus for Linux before 5.0.10, and other platforms before 4.11, when "Enabled scanning of archives" is set, allows remote attackers to cause a denial of service (infinite loop) via a malformed RAR archive with an Archive Header section with the head_size and pack_size fields set to zero.

Affected products

• Sophos Anti-Virus: version 4.04 only; version 4.05 only; version 4.5.3 only; version 4.5.4 only; version 4.5.11 only; version 4.5.12 only; …
• Sophos Endpoint Security: up to and including 6.04

Published 2006-11-01. Last modified 2026-06-16.