source: http://www.securityfocus.com/bid/1190/info

Sending a specially crafted URL containing malformed file extension information to Microsoft IIS 4.0/5.0 will consume CPU usage until it reaches 100% which will halt the program's services. Restarting the application or waiting until the URL is processed will be required in order to regain normal functionality.

https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/bin-sploits/19907-1.exe

https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/bin-sploits/19907.zip