Several vulnerabilities have been discovered in the ClamAV anti-virus toolkit: Attackers can cayse a denial of service (crash) via a crafted EXE file that triggers a divide-by-zero error. Attackers can cause a denial of service (infinite loop) via a crafted tar file that causes (1) clamd and (2) clamscan to hang. (no CVE Id yet) Attackers can cause a denial of service (crash) via a crafted EXE file that crashes the UPack unpacker.