Buffer overflow in University of Washington imapd version 4.7 allows users with a valid account to execute commands via LIST or other commands.
http://www.securityfocus.com/bid/1110
http://archives.neohapsis.com/archives/bugtraq/2000-04/0085.html
http://archives.neohapsis.com/archives/bugtraq/2000-04/0074.html