arclib.dll before 7.3.0.9 in CA Anti-Virus (formerly eTrust Antivirus) 8 and certain other CA products allows remote attackers to cause a denial of service (infinite loop and loss of antivirus functionality) via an invalid "previous listing chunk number" field in a CHM file.

Multiple unspecified vulnerabilities in the Arclib library (arclib.dll) before 7.3.0.15 in the CA Anti-Virus engine for CA Anti-Virus for the Enterprise 7.1, r8, and r8.1; Anti-Virus 2007 v8 and 2008; Internet Security Suite 2007 v3 and 2008; and other CA products allow remote attackers to bypass virus detection via a malformed archive file.