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.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2014-1518
http://secunia.com/advisories/56850
http://seclists.org/fulldisclosure/2014/Feb/39
http://packetstormsecurity.com/files/125073/Core-FTP-Server-1.2-DoS-Traversal-Disclosure.html