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Yukihiro Matsumoto Ruby XMLRPC Server Denial of Service Vulnerability

Attackers exploit this issue with standard network utilities.

The following Ruby command will issue a request sufficient to trigger this issue:

ruby -rsocket -e 'TCPSocket.open("www.example.com", 10080) {|s|
s.print "GET /z HTTP/1.0\r\n\r\n"
sleep
}'

This is demonstrated to work with the Ruby demonstration 'httpd.rb' file. By placing a 100k file in the document root of the demonstration server called 'z', and then executing this Ruby command, further requests will be denied.