KpyM telnet server versions 1.05 and below for Microsoft Windows NT/2000/XP fail to properly clean up when disconnecting users, allowing for a remote attacker to commit a denial of service attack.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/32490/KpyM_advisory.txt
Source: https://packetstormsecurity.com/files/32490/KpyM_advisory.txt.html