CVE-2005-1923: Clam Anti-Virus Clamav

Low severity, CVSS 2.6. EPSS: 1.6% chance of exploitation in the next 30 days.

The ENSURE_BITS macro in mszipd.c for Clam AntiVirus (ClamAV) 0.83, and other versions vefore 0.86, allows remote attackers to cause a denial of service (CPU consumption by infinite loop) via a cabinet (CAB) file with the cffile_FolderOffset field set to 0xff, which causes a zero-length read.

Affected products

• Clam Anti-Virus Clamav: version 0.83 only; version 0.84_rc1 only; version 0.84_rc2 only; version 0.85 only; version 0.85.1 only

Published 2005-07-05. Last modified 2026-06-16.