Alpha Black Zero: Intrepid Protocol versions 1.04 and below suffer from a denial of service flaw where the server does not limit how many clients can attempt to connect.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/34537/alphaBlack104.txt
Source: https://packetstormsecurity.com/files/34537/alphaBlack104.txt.html