The FTP server in Perforce Server 2008.1 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a certain MKD command.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2010-0957
http://www.securityfocus.com/bid/36261
http://lists.immunitysec.com/pipermail/dailydave/2010-March/006063.html