Directory traversal vulnerability in Cerberus FTP Server 1.5 and earlier allows remote attackers to read arbitrary files via a .. (dot dot) in the CD command.
http://www.securiteam.com/windowsntfocus/5SP0M0055W.html
http://www.iss.net/security_center/static/7004.php
http://www.greenepa.net/~averett/cerberus-releasenotes.htm#ReleaseNotes