source: http://www.securityfocus.com/bid/7469/info

Microsoft BizTalk Server 2002 contains a boundary condition error that could allow a buffer to be overrun. Successful exploitation could allow arbitrary code execution in the security context of the IIS Server hosting the application.

It is important to note that the HTTP Receiver is an optional component and is not installed by default.

POST /Site/biztalkhttpreceive.dll?XXXX...(more than 250 chars) HTTP/1.0