Directory traversal vulnerability in Core FTP Server 1.2 before build 515 allows remote authenticated users to determine the existence of arbitrary files via a /../ sequence in an XCRC command.
http://coreftp.com/forums/viewtopic.php?t=2985707
http://packetstormsecurity.com/files/125073/Core-FTP-Server-1.2-DoS-Traversal-Disclosure.html
http://seclists.org/fulldisclosure/2014/Feb/39