Discovery Date: Nov 14, 2009  
Risk: Important  
Affected Software:  
  * Wing FTP Server 3.1.2 
Description:


There is a Denial of Service 
(DoS) vulnerability that exists in Wing FTP Server 3.1.2. The 
said vulnerability can be exploited by using an invalid parameter for 
PORT command. When exploited successfully, the vulnerability could cause FTP server using the said software to crash.
Wing FTP Server 3.1.2 on a  Windows environment is affected. 
Other versions may also be affected. 

Patch Information:


More 
information on the patch can be found in the following page:
  * Wing FTP 
Server History
Discovered by:
Sumit Kumar Soni , Trend Micro
Read more about this threat incident in the Malware Blog entry "Trend Micro Discovers Wing FTP Server PORT Command DoS Bug."   hxxp://threatinfo.trendmicro.com/vinfo/SecAdvisories/default6.asp?VNAME=Wing+FTP+Server+PORT+Command+DoS+Vulnerability&Page=2

hxxp://voidroot.blogspot.com/2010/06/wing-ftp-server-port-command-dos.html