GoodTech Telnet Server 4.x for Microsoft Windows NT/2000/XP is susceptible to a denial of service attack when attempting to handle an overly long input string.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/32474/gtsTsXp4.0.103-adv.txt
Source: https://packetstormsecurity.com/files/32474/gtsTsXp4.0.103-adv.txt.html