Comodo Internet Security before 3.9.95478.509 allows remote attackers to bypass malware detection in an RAR archive via an unspecified manipulation of the archive file format.
http://www.securityfocus.com/bid/34737
http://www.securityfocus.com/archive/1/503018
http://personalfirewall.comodo.com/release_notes.html
http://blog.zoller.lu/2009/04/comodo-antivirus-evasionbypass.html