CVE-2007-4577: Sophos Anti-Virus

High severity, CVSS 7.8. EPSS: 5.5% chance of exploitation in the next 30 days.

Sophos Anti-Virus for Unix/Linux before 2.48.0 allows remote attackers to cause a denial of service (infinite loop) via a malformed BZip file that results in the creation of multiple Engine temporary files (aka a "BZip bomb").

Affected products

• Sophos Anti-Virus: version 3.4.6 only; version 3.78 only; version 3.78d only; version 3.79 only; version 3.80 only; version 3.81 only; …
• Sophos Scanning Engine: version 2.30.4 only; version 2.40.2 only
• Sophos Small Business Suite: version 4.04 only; version 4.05 only

Published 2007-08-28. Last modified 2026-06-16.