As viewed in URL:

	http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0396

Heap-based buffer overflow in CVS 1.11.x up to 1.11.15, and 1.12.x up
to 1.12.7, when using the pserver mechanism allows remote attackers to
execute arbitrary code via Entry lines. 

This exploit makes computers running cvs pserver vulnerable to a remote
code execution attack.