https://www.exploit-db.com/exploits/22144

漏洞细节尚未披露

source: http://www.securityfocus.com/bid/6587/info

A problem with the handling of input has been reported in Xynph FTP Server. Under some circumstances, it may be possible for a remote user to escape the FTP root directory using relative path notation. This could allow unauthorized access to systems using the vulnerable software. 

cd ...