The NetSupport Manager client that listens on TCP port 5405 does not properly validate input supplied during the initial connection sequence. Specifically, during the configuration exchange part of the initial connection setup, the client does not appear to validate the supplied data which can result in a DoS of the NetSupport Manager Client. Remote code exploitation is also thought to be possible.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/59813/DDIVRT-2007-05.txt
Source: https://packetstormsecurity.com/files/59813/Digital-Defense-VRT-Advisory-2007.5.html