pyftpdlib FTP Server Multiple Vulnerabilities

Summary
This host is running pyftpdlib FTP server and is prone to multiple vulnerabilities.
Impact
Successful exploitation will allow attacker to cause a denial of service. Impact Level: Application
Solution
Upgrade to pyftpdlib version 0.5.2 or later, For updates refer to http://code.google.com/p/pyftpdlib/downloads/list
Insight
- Race condition in the FTPHandler class allows remote attackers to cause a denial of service by establishing and then immediately closing a TCP connection. - Improper permission check for the NLST command allows remote authenticated users to bypass intended access restrictions and list the root directory via an FTP session. - Memory leak in the on_dtp_close function allows remote authenticated users to cause a denial of service by sending a QUIT command during a data transfer.
Affected
ftpserver.py in pyftpdlib before 0.5.2
References