The Netware 5.1 SP6 suffers from a buffer overflow in the web server PERL handler CGI2PERL.NLM which will cause a denial of service situation. CERT: VU# 185593.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/31424/netware.perl.txt
Source: https://packetstormsecurity.com/files/31424/netware.perl.txt.html