| 1 |
<?php |
| 2 |
|
| 3 |
// Do not allow the file to be called directly. |
| 4 |
if ( ! defined( 'ABSPATH' ) ) { |
| 5 |
exit; |
| 6 |
} |
| 7 |
|
| 8 |
/** |
| 9 |
* This class is used to provide several hardening options. |
| 10 |
*/ |
| 11 |
class P_Hardening extends P_Core { |
| 12 |
|
| 13 |
/** |
| 14 |
* Add the actions required for the hardening of the site. |
| 15 |
* |
| 16 |
* @param Patchstack $core |
| 17 |
* @return void |
| 18 |
*/ |
| 19 |
public function __construct( $core ) { |
| 20 |
parent::__construct( $core ); |
| 21 |
|
| 22 |
// Auto update plugins. |
| 23 |
add_action( 'patchstack_update_plugins', [ $this, 'update_vulnerable_plugins' ] ); |
| 24 |
|
| 25 |
// The hardening features can only be used on an activated license. |
| 26 |
if ( ! $this->license_is_active() || $this->get_option( 'patchstack_license_free', 0 ) == 1 ) { |
| 27 |
return; |
| 28 |
} |
| 29 |
|
| 30 |
// Disallowed modification of the theme files? |
| 31 |
if ( ! defined( 'DISALLOW_FILE_EDIT' ) && $this->get_option( 'patchstack_pluginedit', true ) ) { |
| 32 |
define( 'DISALLOW_FILE_EDIT', 1 ); |
| 33 |
} |
| 34 |
|
| 35 |
// Set security headers |
| 36 |
add_filter( 'wp_headers', [ $this, 'set_security_headers' ], 10, 1 ); |
| 37 |
|
| 38 |
// When country blocking is set. |
| 39 |
if ( $this->get_option( 'patchstack_geo_block_enabled', false ) && ! empty( $this->get_option( 'patchstack_geo_block_countries', [] ) ) ) { |
| 40 |
add_action( 'init', array( $this, 'geo_block_check' ), ~PHP_INT_MAX ); |
| 41 |
} |
| 42 |
|
| 43 |
// Apply comment captcha? |
| 44 |
if ( $this->get_option( 'patchstack_captcha_on_comments', 0 ) && ! is_user_logged_in() ) { |
| 45 |
add_action( 'comment_form_after_fields', [ $this, 'captcha_display' ] ); |
| 46 |
add_filter( 'preprocess_comment', [ $this, 'verify_recaptcha' ] ); |
| 47 |
} |
| 48 |
|
| 49 |
// Disable the application passwords feature? |
| 50 |
if ( $this->get_option( 'patchstack_application_passwords_disabled', false ) == true ) { |
| 51 |
add_filter( 'wp_is_application_passwords_available', '__return_false' ); |
| 52 |
} |
| 53 |
|
| 54 |
// Block unauthorized XML-RPC requests? |
| 55 |
if ( $this->get_option( 'patchstack_xmlrpc_is_disabled', false ) == true ) { |
| 56 |
add_filter( 'xmlrpc_enabled', '__return_false' ); |
| 57 |
} |
| 58 |
|
| 59 |
// Block unauthorized wp-json requests? |
| 60 |
if ( $this->get_option( 'patchstack_json_is_disabled', false ) ) { |
| 61 |
add_filter( 'rest_authentication_errors', [ $this, 'disable_wpjson' ] ); |
| 62 |
} |
| 63 |
|
| 64 |
// Prevent user enumeration? |
| 65 |
if ( $this->get_option( 'patchstack_userenum' ) ) { |
| 66 |
add_action( 'init', [ $this, 'stop_user_enum' ], 1 ); |
| 67 |
} |
| 68 |
|
| 69 |
// Attempt to hide the WordPress version? |
| 70 |
if ( $this->get_option( 'patchstack_hidewpversion' ) ) { |
| 71 |
remove_action( 'wp_head', 'wp_generator' ); |
| 72 |
add_filter( 'the_generator', [ $this, 'remove_generator' ] ); |
| 73 |
} |
| 74 |
|
| 75 |
// Block email registration patterns? |
| 76 |
if ( $this->get_option( 'patchstack_register_email_blacklist', '' ) != '' ) { |
| 77 |
add_filter( 'registration_errors', [ $this, 'check_email_pattern' ], 1, 3 ); |
| 78 |
add_filter( 'wpmu_validate_user_signup', [ $this, 'check_email_pattern_wpmu' ], 1, 1 ); |
| 79 |
} |
| 80 |
|
| 81 |
// Auto update software? |
| 82 |
$update = get_site_option( 'patchstack_auto_update', [] ); |
| 83 |
if ( is_array( $update ) ) { |
| 84 |
foreach ( $update as $type ) { |
| 85 |
if ( $type != 'vulnerable' ) { |
| 86 |
add_filter( 'auto_update_' . $type, '__return_true' ); |
| 87 |
} |
| 88 |
} |
| 89 |
} |
| 90 |
} |
| 91 |
|
| 92 |
/** |
| 93 |
* Perform updates if the software upload call returns vulnerabilities. |
| 94 |
* This is only executed when auto updates are enabled for vulnerable plugins. |
| 95 |
* |
| 96 |
* @param array $plugins |
| 97 |
* @return void |
| 98 |
*/ |
| 99 |
public function update_vulnerable_plugins() { |
| 100 |
// Is the auto update setting for vulnerable plugins enabled? |
| 101 |
$update = get_site_option( 'patchstack_auto_update', [] ); |
| 102 |
if ( ! is_array( $update ) || ! in_array( 'vulnerable', $update ) ) { |
| 103 |
return; |
| 104 |
} |
| 105 |
|
| 106 |
// Do we even have any vulnerable plugins to auto update? |
| 107 |
$plugins = get_site_option( 'patchstack_vulnerable_plugins', [] ); |
| 108 |
if ( ! is_array( $plugins ) || count( $plugins ) == 0 ) { |
| 109 |
return; |
| 110 |
} |
| 111 |
|
| 112 |
// Might not be necessary, but should prevent any hanging issues. |
| 113 |
@set_time_limit( 180 ); |
| 114 |
|
| 115 |
// Require some files we need to execute the upgrade. |
| 116 |
@include_once ABSPATH . 'wp-admin/includes/class-wp-upgrader.php'; |
| 117 |
if ( file_exists( ABSPATH . 'wp-admin/includes/class-plugin-upgrader.php' ) ) { |
| 118 |
@include_once ABSPATH . 'wp-admin/includes/class-plugin-upgrader.php'; |
| 119 |
} |
| 120 |
|
| 121 |
@include_once ABSPATH . 'wp-admin/includes/plugin.php'; |
| 122 |
@include_once ABSPATH . 'wp-admin/includes/misc.php'; |
| 123 |
@include_once ABSPATH . 'wp-admin/includes/file.php'; |
| 124 |
@wp_update_plugins(); |
| 125 |
$all_plugins = get_plugins(); |
| 126 |
|
| 127 |
// New array with all available plugins and the ones we want to upgrade. |
| 128 |
$upgrade = []; |
| 129 |
foreach ( $all_plugins as $path => $data ) { |
| 130 |
if ( in_array( $path, $plugins ) ) { |
| 131 |
array_push( $upgrade, $path ); |
| 132 |
} |
| 133 |
} |
| 134 |
|
| 135 |
// Upgrade the plugins. |
| 136 |
$upgrader = new Plugin_Upgrader( new Automatic_Upgrader_Skin() ); |
| 137 |
$upgrader->bulk_upgrade( $upgrade ); |
| 138 |
|
| 139 |
// Reset the option that holds the vulnerable plugins. |
| 140 |
update_site_option( 'patchstack_vulnerable_plugins', [] ); |
| 141 |
|
| 142 |
// Resend the sofware data to the API. |
| 143 |
do_action( 'patchstack_send_software_data' ); |
| 144 |
} |
| 145 |
|
| 146 |
/** |
| 147 |
* Determine the country of the user and if we should block the user. |
| 148 |
* |
| 149 |
* @return void |
| 150 |
*/ |
| 151 |
public function geo_block_check() { |
| 152 |
$countries = $this->get_option( 'patchstack_geo_block_countries', [] ); |
| 153 |
$ip = $this->get_ip(); |
| 154 |
|
| 155 |
// Don't block Patchstack. |
| 156 |
if ( in_array( $ip, $this->ips ) || ( isset( $_POST['webarx_secret'] ) && $this->plugin->listener->verifyToken( $_POST['webarx_secret'] ) ) || isset( $_POST['patchstack_ott_action'] )) { |
| 157 |
|
| 158 |
// OTT action. |
| 159 |
if ( isset( $_POST['patchstack_ott_action'] ) ) { |
| 160 |
$ott = get_option( 'patchstack_ott_action', '' ); |
| 161 |
if ( ! empty( $ott ) && hash_equals( $ott, $_POST['patchstack_ott_action'] ) ) { |
| 162 |
return; |
| 163 |
} |
| 164 |
} else { |
| 165 |
return; |
| 166 |
} |
| 167 |
} |
| 168 |
|
| 169 |
// Load the required libraries. |
| 170 |
try { |
| 171 |
require_once __DIR__ . '/../lib/geoip2-php/autoload.php'; |
| 172 |
$reader = new GeoIp2\Database\Reader( __DIR__ . '/../lib/GeoLite2-Country.mmdb' ); |
| 173 |
$record = $reader->country( $ip ); |
| 174 |
|
| 175 |
// Determine if we want to do an inverse check or not. |
| 176 |
$match = in_array( $record->country->isoCode, $countries ); |
| 177 |
$match = $this->get_option( 'patchstack_geo_block_inverse', false ) ? ! $match : $match; |
| 178 |
|
| 179 |
// Check if there's a match. |
| 180 |
if ( $match ) { |
| 181 |
$this->plugin->firewall_base->display_error_page( 23 ); |
| 182 |
} |
| 183 |
} catch ( \Exception $e ) { |
| 184 |
} |
| 185 |
} |
| 186 |
|
| 187 |
/** |
| 188 |
* Prevent unauthorized users from accessing wp-json. |
| 189 |
* |
| 190 |
* @return void|WP_Error |
| 191 |
*/ |
| 192 |
public function disable_wpjson() { |
| 193 |
// Some default exceptions. |
| 194 |
$path = parse_url( $_SERVER['REQUEST_URI'], PHP_URL_PATH ); |
| 195 |
$whitelists = [ '/wp-json/contact-form-7/' ]; |
| 196 |
foreach ( $whitelists as $whitelist ) { |
| 197 |
if ( stripos( $path, $whitelist ) !== false ) { |
| 198 |
return; |
| 199 |
} |
| 200 |
} |
| 201 |
|
| 202 |
// Block unauthorized users. |
| 203 |
if ( ! is_user_logged_in() ) { |
| 204 |
$msg = apply_filters( 'disable_wp_rest_api_error', esc_attr__( 'The WP REST API cannot be accessed by unauthorized users.', 'disable-wp-rest-api' ) ); |
| 205 |
return new WP_Error( 'rest_authorization_required', $msg, [ 'status' => rest_authorization_required_code() ] ); |
| 206 |
} |
| 207 |
} |
| 208 |
|
| 209 |
/** |
| 210 |
* Set security headers if the option is enabled. |
| 211 |
* |
| 212 |
* @param array $headers |
| 213 |
* @return void|array |
| 214 |
*/ |
| 215 |
public function set_security_headers( $headers ) { |
| 216 |
if ( get_option( 'patchstack_add_security_headers' ) ) { |
| 217 |
$headers['Referrer-Policy'] = 'strict-origin-when-cross-origin'; |
| 218 |
$headers['X-Frame-Options'] = 'SAMEORIGIN'; |
| 219 |
$headers['X-XSS-Protection'] = '1; mode=block'; |
| 220 |
$headers['X-Content-Type-Options'] = 'nosniff'; |
| 221 |
$headers['X-Powered-By'] = null; |
| 222 |
$headers['Server'] = null; |
| 223 |
$headers['Strict-Transport-Security'] = 'max-age=31536000'; |
| 224 |
} |
| 225 |
|
| 226 |
return $headers; |
| 227 |
} |
| 228 |
|
| 229 |
/** |
| 230 |
* Determine if the reCAPTCHA is valid upon comment submission. |
| 231 |
* |
| 232 |
* @param array $comment_data |
| 233 |
* @return void|array |
| 234 |
*/ |
| 235 |
public function verify_recaptcha( $comment_data ) { |
| 236 |
$result = $this->captcha_check(); |
| 237 |
if ( ! $result['response'] && ( $result['reason'] === 'VERIFICATION_FAILED' || $result['reason'] === 'RECAPTCHA_EMPTY_RESPONSE' ) ) { |
| 238 |
wp_clear_auth_cookie(); |
| 239 |
wp_die( 'reCaptcha was not solved or response was empty', 'Error' ); |
| 240 |
} |
| 241 |
|
| 242 |
return $comment_data; |
| 243 |
} |
| 244 |
|
| 245 |
/** |
| 246 |
* Add the captcha to the comments form. |
| 247 |
* |
| 248 |
* @return void |
| 249 |
*/ |
| 250 |
public function captcha_display() { |
| 251 |
switch ( $this->get_option( 'patchstack_captcha_type' ) ) { |
| 252 |
case 'v2': |
| 253 |
$site_key = trim( $this->get_option( 'patchstack_captcha_public_key' ) ); |
| 254 |
require_once dirname( __FILE__ ) . '/views/captcha_v2.php'; |
| 255 |
break; |
| 256 |
case 'invisible': |
| 257 |
$site_key = trim( $this->get_option( 'patchstack_captcha_public_key_v3' ) ); |
| 258 |
require_once dirname( __FILE__ ) . '/views/captcha_invisible.php'; |
| 259 |
break; |
| 260 |
case 'v3': |
| 261 |
$site_key = trim( $this->get_option( 'patchstack_captcha_public_key_v3_new' ) ); |
| 262 |
require_once dirname( __FILE__ ) . '/views/captcha_v3.php'; |
| 263 |
break; |
| 264 |
case 'turnstile': |
| 265 |
$site_key = trim( $this->get_option( 'patchstack_captcha_public_key_turnstile' ) ); |
| 266 |
require_once dirname( __FILE__ ) . '/views/captcha_turnstile.php'; |
| 267 |
break; |
| 268 |
} |
| 269 |
} |
| 270 |
|
| 271 |
/** |
| 272 |
* Check if the submitted reCAPTCHA is valid. |
| 273 |
* |
| 274 |
* @return array |
| 275 |
*/ |
| 276 |
public function captcha_check() { |
| 277 |
switch ( $this->get_option( 'patchstack_captcha_type' ) ) { |
| 278 |
case 'v2': |
| 279 |
$secret_key = trim( $this->get_option( 'patchstack_captcha_private_key' ) ); |
| 280 |
$site_key = trim( $this->get_option( 'patchstack_captcha_public_key' ) ); |
| 281 |
break; |
| 282 |
case 'invisible': |
| 283 |
$secret_key = trim( $this->get_option( 'patchstack_captcha_private_key_v3' ) ); |
| 284 |
$site_key = trim( $this->get_option( 'patchstack_captcha_public_key_v3' ) ); |
| 285 |
break; |
| 286 |
case 'v3': |
| 287 |
$secret_key = trim( $this->get_option( 'patchstack_captcha_private_key_v3_new' ) ); |
| 288 |
$site_key = trim( $this->get_option( 'patchstack_captcha_public_key_v3_new' ) ); |
| 289 |
break; |
| 290 |
case 'turnstile': |
| 291 |
$secret_key = trim( $this->get_option( 'patchstack_captcha_private_key_turnstile' ) ); |
| 292 |
$site_key = trim( $this->get_option( 'patchstack_captcha_public_key_turnstile' ) ); |
| 293 |
break; |
| 294 |
} |
| 295 |
|
| 296 |
if ( ! $secret_key || ! $site_key ) { |
| 297 |
return [ |
| 298 |
'response' => false, |
| 299 |
'reason' => 'ERROR_NO_KEYS', |
| 300 |
]; |
| 301 |
} |
| 302 |
|
| 303 |
if ( ! isset( $_POST['g-recaptcha-response'] ) || empty( $_POST['g-recaptcha-response'] ) ) { |
| 304 |
return [ |
| 305 |
'response' => false, |
| 306 |
'reason' => 'RECAPTCHA_EMPTY_RESPONSE', |
| 307 |
]; |
| 308 |
} |
| 309 |
|
| 310 |
$response = $this->get_captcha_response( $secret_key, $this->get_option( 'patchstack_captcha_type' ) ); |
| 311 |
if ( isset( $response['success'] ) && ! empty( $response['success'] ) ) { |
| 312 |
return [ |
| 313 |
'response' => true, |
| 314 |
'reason' => '', |
| 315 |
]; |
| 316 |
} |
| 317 |
|
| 318 |
return [ |
| 319 |
'response' => false, |
| 320 |
'reason' => 'VERIFICATION_FAILED', |
| 321 |
]; |
| 322 |
} |
| 323 |
|
| 324 |
/** |
| 325 |
* Query Google for reAPTCHA validation and response. |
| 326 |
* |
| 327 |
* @param string $privatekey |
| 328 |
* @param string $type |
| 329 |
* @return array |
| 330 |
*/ |
| 331 |
public function get_captcha_response( $privatekey, $type ) { |
| 332 |
$args = [ |
| 333 |
'body' => [ |
| 334 |
'secret' => $privatekey, |
| 335 |
'response' => $_POST['g-recaptcha-response'], |
| 336 |
], |
| 337 |
'sslverify' => false, |
| 338 |
]; |
| 339 |
|
| 340 |
if ($type != 'turnstile') { |
| 341 |
$resp = wp_remote_post( 'https://www.google.com/recaptcha/api/siteverify', $args ); |
| 342 |
} else { |
| 343 |
$resp = wp_remote_post( 'https://challenges.cloudflare.com/turnstile/v0/siteverify', $args ); |
| 344 |
} |
| 345 |
|
| 346 |
return json_decode( wp_remote_retrieve_body( $resp ), true ); |
| 347 |
} |
| 348 |
|
| 349 |
/** |
| 350 |
* Delete the readme.html file. |
| 351 |
* |
| 352 |
* @return void |
| 353 |
*/ |
| 354 |
public function delete_readme() { |
| 355 |
if ( get_site_option( 'patchstack_rm_readme', false ) != true || ! file_exists( ABSPATH . 'readme.html' ) ) { |
| 356 |
return; |
| 357 |
} |
| 358 |
|
| 359 |
require_once ABSPATH . 'wp-admin/includes/class-wp-filesystem-base.php'; |
| 360 |
require_once ABSPATH . 'wp-admin/includes/class-wp-filesystem-direct.php'; |
| 361 |
$fs = new WP_Filesystem_Direct( '' ); |
| 362 |
$fs->delete( ABSPATH . 'readme.html' ); |
| 363 |
} |
| 364 |
|
| 365 |
/** |
| 366 |
* Disable user enumeration with ?author= and the REST endpoint. |
| 367 |
* |
| 368 |
* @return void |
| 369 |
*/ |
| 370 |
public function stop_user_enum() { |
| 371 |
if ( isset( $_GET['author'] ) && ! is_user_logged_in() && ! is_admin() ) { |
| 372 |
die( wp_safe_redirect( get_site_url() ) ); |
| 373 |
} |
| 374 |
|
| 375 |
if ( stripos( $_SERVER['REQUEST_URI'], 'v2/users' ) !== false || ( isset( $_REQUEST['rest_route'] ) && stripos( $_REQUEST['rest_route'], 'v2/users' ) !== false ) ) { |
| 376 |
if ( ! is_user_logged_in() ) { |
| 377 |
die( wp_safe_redirect( get_site_url() ) ); |
| 378 |
} |
| 379 |
} |
| 380 |
} |
| 381 |
|
| 382 |
/** |
| 383 |
* Hide the WordPress generator version in response. |
| 384 |
* |
| 385 |
* @return string |
| 386 |
*/ |
| 387 |
public function remove_generator() { |
| 388 |
return ''; |
| 389 |
} |
| 390 |
|
| 391 |
/** |
| 392 |
* Determine if the email address of a new registration matches the defined patterns. |
| 393 |
* This filter is called on regular sites. |
| 394 |
* |
| 395 |
* @param object $errors |
| 396 |
* @param string $sanitized_user_login |
| 397 |
* @param string $user_email |
| 398 |
* @return object |
| 399 |
*/ |
| 400 |
public function check_email_pattern( $errors, $sanitized_user_login, $user_email ) { |
| 401 |
$patterns = explode( ',', $this->get_option( 'patchstack_register_email_blacklist' ) ); |
| 402 |
foreach ( $patterns as $pattern ) { |
| 403 |
if ( stripos( $user_email, $pattern ) !== false ) { |
| 404 |
$errors->add( 'user_email', esc_attr__( 'An invalid email address has been supplied.', 'patchstack' ) ); |
| 405 |
} |
| 406 |
} |
| 407 |
|
| 408 |
return $errors; |
| 409 |
} |
| 410 |
|
| 411 |
/** |
| 412 |
* Determine if the email address of a new registration matches the defined patterns. |
| 413 |
* This filter is called on network sites. |
| 414 |
* |
| 415 |
* @param array $result |
| 416 |
* @return array |
| 417 |
*/ |
| 418 |
public function check_email_pattern_wpmu( $result ) { |
| 419 |
if ( isset( $result['user_email'] ) ) { |
| 420 |
$patterns = explode( ',', $this->get_option( 'patchstack_register_email_blacklist' ) ); |
| 421 |
foreach ( $patterns as $pattern ) { |
| 422 |
if ( stripos( $result['user_email'], $pattern ) !== false ) { |
| 423 |
$result['errors']->add( 'user_email', esc_attr__( 'An invalid email address has been supplied.', 'patchstack' ) ); |
| 424 |
} |
| 425 |
} |
| 426 |
} |
| 427 |
|
| 428 |
return $result; |
| 429 |
} |
| 430 |
} |
| 431 |
|
