Directory traversal vulnerability in the FTP server in Rhino Software Serv-U File Server 7.0.0.1 through 7.4.0.1 allows remote attackers to create arbitrary directories via a \.. (backslash dot dot) in an MKD request.
https://www.exploit-db.com/exploits/8211
https://exchange.xforce.ibmcloud.com/vulnerabilities/49258
http://www.vupen.com/english/advisories/2009/0738
http://www.securityfocus.com/bid/34125