##
# 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::Tcp
	include Msf::Auxiliary::Scanner
	include Msf::Auxiliary::Report

	def initialize
		super(
			'Name'		=> 'X11 No-Auth Scanner',
			'Description'	=> %q{
				This module scans for X11 servers that allow anyone
				to connect without authentication.
			},
			'Author'	=> ['tebo <tebodell[at]gmail.com>'],
			'References'	=>
				[
					['OSVDB', '309'],
					['CVE', '1999-0526'],
				],
			'License'	=> MSF_LICENSE
		)

		register_options([
			Opt::RPORT(6000)
		],self.class)
	end

	def run_host(ip)

		begin

			connect

			# X11.00 Null Auth Connect
			sock.put("\x6c\x00\x0b\x00\x00\x00\x00\x00\x00\x00\x00\x00")
			response = sock.get_once

			disconnect

			if(response)
				success = response[0,1].unpack('C')[0]
			end


			if(success == 1)
				vendor_len = response[24,2].unpack('v')[0]
				vendor = response[40,vendor_len].unpack('A*')[0]
				print_status("#{ip} Open X Server (#{vendor})")
				#Add Report
				report_note(
					:host	=> ip,
					:proto => 'tcp',
					:sname	=> 'x11',
					:port	=> rport,
					:type	=> 'Open X Server',
					:data	=> "Open X Server (#{vendor})"
			)
			elsif (success == 0)
				print_status("#{ip} Access Denied")
			else
				# X can return a reason for auth failure but we don't really care for this
			end

		rescue ::Rex::ConnectionError
		rescue ::Errno::EPIPE
		end

	end

end