Directory traversal vulnerability in Rhino Software, Inc. FTP Voyager 15.2.0.11, and possibly earlier, allows remote FTP servers to write arbitrary files via a "..\" (dot dot backslash) in a filename.
https://exchange.xforce.ibmcloud.com/vulnerabilities/62392
http://www.securityfocus.com/bid/43869
http://www.htbridge.ch/advisory/directory_traversal_vulnerability_in_ftp_voyager.html
http://secunia.com/advisories/41719
http://packetstormsecurity.org/1010-exploits/ftpvoyager-traversal.txt