Directory traversal vulnerability in Pablo FTP server 1.0 build 9 and earlier allows remote authenticated users to list arbitrary directories via "..\" (dot-dot backslash) sequences in a LIST command.
http://www.securityfocus.com/bid/5283
http://www.pablovandermeer.nl/ftpserversrc.zip
http://www.iss.net/security_center/static/9647.php
http://online.securityfocus.com/archive/1/283665
http://archives.neohapsis.com/archives/vulnwatch/2002-q3/0035.html