File Content: class-secupress-scan-bad-file-extensions.php <?php defined( 'ABSPATH' ) or die( 'Something went wrong.' ); /** * Bad File Extensions scan class. * * @package SecuPress * @subpackage SecuPress_Scan * @since 1.0 */ class SecuPress_Scan_Bad_File_Extensions extends SecuPress_Scan implements SecuPress_Scan_Interface { /** Constants. ============================================================================== */ /** * Class version. * * @var (string) */ const VERSION = '1.2'; /** Properties. ============================================================================= */ /** * The reference to the *Singleton* instance of this class. * * @var (object) */ protected static $_instance; /** * Tells if a scanner is fixable by SecuPress. The value "pro" means it's fixable only with the version PRO. * * @var (bool|string) */ protected $fixable = 'pro'; /** * The test file path. * * @var (bool|string) */ protected $file_path = false; /** * The test file URL. * * @var (bool|string) */ protected $file_url = false; /** Init and messages. ====================================================================== */ /** * Init. * * @since 1.0 */ protected function init() { global $is_apache, $is_nginx, $is_iis7; $this->title = __( 'Check if there are files using bad extensions are accessible in the uploads folder.', 'secupress' ); $this->more = __( 'The uploads folder should only contain files like images, pdf, or zip archives. Other files should not be accessible by their URL.', 'secupress' ); $this->more_fix = sprintf( __( 'Activate the %1$s protection from the module %2$s.', 'secupress' ), '<strong>' . __( 'Bad File Extensions', 'secupress' ) . '</strong>', '<a href="' . esc_url( secupress_admin_url( 'modules', 'file-system' ) ) . '#module-bad-file-extensions">' . __( 'Malware Scan', 'secupress' ) . '</a>' ); if ( ! $is_apache && ! $is_nginx && ! $is_iis7 ) { $this->more_fix = static::get_messages( 301 ); $this->fixable = false; return; } } /** * Get messages. * * @since 1.0 * * @param (int) $message_id A message ID. * * @return (string|array) A message if a message ID is provided. An array containing all messages otherwise. */ public static function get_messages( $message_id = null ) { global $is_apache; $config_file = $is_apache ? '.htaccess' : 'web.config'; /** Translators: 1 is the name of a protection, 2 is the name of a module. */ $activate_protection_message = sprintf( __( 'But you can activate the %1$s protection from the module %2$s.', 'secupress' ), '<strong>' . __( 'Bad File Extensions', 'secupress' ) . '</strong>', '<a target="_blank" href="' . esc_url( secupress_admin_url( 'modules', 'file-system' ) ) . '#module-bad-file-extensions">' . __( 'Malware Scan', 'secupress' ) . '</a>' ); $messages = array( // "good" 0 => __( 'Files that use bad extensions are protected.', 'secupress' ), /** Translators: %s is a file name. */ 1 => sprintf( __( 'The rules forbidding access to files that use bad extensions have been successfully added to your %s file.', 'secupress' ), "<code>$config_file</code>" ), // "warning" 100 => __( 'Unable to determine the status of the bad file extensions test file.', 'secupress' ) . ' ' . $activate_protection_message, // "bad" 200 => __( 'Could not create a bad extension test file in the uploads folder.', 'secupress' ) . ' ' . $activate_protection_message, 201 => __( 'Whether or not you have files using bad extensions in the uploads folder, those files are accessible directly.', 'secupress' ), // "cantfix" /** Translators: 1 is a file name, 2 is some code. */ 300 => sprintf( __( 'Your server runs <strong>Nginx</strong>, the files that use bad extensions cannot be protected automatically but you can do it yourself by adding the following code to your %1$s file: %2$s', 'secupress' ), '<code>nginx.conf</code>', '%s' ), 301 => __( 'Your server runs an unrecognized system. The files that use bad extensions cannot be protected automatically.', 'secupress' ), /** Translators: 1 is a file name, 2 is some code. */ 302 => sprintf( __( 'Your %1$s file is not writable. Please add the following lines at the beginning of the file: %2$s', 'secupress' ), "<code>$config_file</code>", '%s' ), /** Translators: 1 is a file name, 2 is a folder path (kind of), 3 is some code. */ 303 => sprintf( __( 'Your %1$s file is not writable. Please add the following lines inside the tags hierarchy %2$s (create it if does not exist): %3$s', 'secupress' ), "<code>$config_file</code>", '%1$s', '%2$s' ), ); if ( isset( $message_id ) ) { return isset( $messages[ $message_id ] ) ? $messages[ $message_id ] : __( 'Unknown message', 'secupress' ); } return $messages; } /** Getters. ================================================================================ */ /** * Get the documentation URL. * * @since 1.2.3 * * @return (string) */ public static function get_docs_url() { return __( 'https://docs.secupress.me/article/124-bad-file-extension-scan', 'secupress' ); } /** Scan. =================================================================================== */ /** * Scan for flaw(s). * * @since 1.0 * * @return (array) The scan results. */ public function scan() { $activated = $this->filter_scanner( __CLASS__ ); if ( true === $activated ) { $this->add_message( 0 ); return parent::scan(); } // Create the temporary file. $this->create_file(); if ( ! $this->file_url ) { // "bad" $this->add_message( 200 ); return parent::scan(); } $response = wp_remote_get( $this->file_url, $this->get_default_request_args() ); if ( is_wp_error( $response ) ) { // "good" $this->add_message( 0 ); } elseif ( 200 === wp_remote_retrieve_response_code( $response ) ) { // "bad" $this->add_message( 201 ); } // Delete the temporary file. $this->delete_file(); // "good" $this->maybe_set_status( 0 ); return parent::scan(); } /** Fix. ==================================================================================== */ /** * Try to fix the flaw(s). * * @since 1.4.5 * * @return (array) The fix results. */ public function need_manual_fix() { return [ 'fix' => 'fix' ]; } /** * Get an array containing ALL the forms that would fix the scan if it requires user action. * * @since 1.4.5 * * @return (array) An array of HTML templates (form contents most of the time). */ protected function get_fix_action_template_parts() { return [ 'fix' => '&nbsp;' ]; } /** * Try to fix the flaw(s) after requiring user action. * * @since 1.4.5 * * @return (array) The fix results. */ public function manual_fix() { if ( $this->has_fix_action_part( 'fix' ) ) { $this->fix(); } // "good" $this->add_fix_message( 1 ); return parent::manual_fix(); } /** * Try to fix the flaw(s). * * @since 1.0 * * @return (array) The fix results. */ public function fix() { global $is_apache, $is_nginx, $is_iis7; if ( $is_apache ) { $this->fix_apache(); } elseif ( $is_iis7 ) { $this->fix_iis7(); } elseif ( $is_nginx ) { $this->fix_nginx(); } else { $this->add_fix_message( 301 ); } return parent::fix(); } /** * Fix for Apache system. * * @since 1.0 */ protected function fix_apache() { global $wp_settings_errors; secupress_activate_submodule( 'file-system', 'bad-file-extensions' ); // Got error? $last_error = is_array( $wp_settings_errors ) && $wp_settings_errors ? end( $wp_settings_errors ) : false; if ( $last_error && 'general' === $last_error['setting'] && 'apache_manual_edit' === $last_error['code'] ) { $rules = static::get_rules_from_error( $last_error ); // "cantfix" $this->add_fix_message( 302, array( $rules ) ); array_pop( $wp_settings_errors ); return; } // "good" $this->add_fix_message( 1 ); } /** * Fix for IIS7 system. * * @since 1.0 */ protected function fix_iis7() { global $wp_settings_errors; secupress_activate_submodule( 'file-system', 'bad-file-extensions' ); // Got error? $last_error = is_array( $wp_settings_errors ) && $wp_settings_errors ? end( $wp_settings_errors ) : false; if ( $last_error && 'general' === $last_error['setting'] && 'iis7_manual_edit' === $last_error['code'] ) { $rules = static::get_rules_from_error( $last_error ); $path = static::get_code_tag_from_error( $last_error, 'secupress-iis7-path' ); // "cantfix" $this->add_fix_message( 303, array( $path, $rules ) ); array_pop( $wp_settings_errors ); return; } // "good" $this->add_fix_message( 1 ); } /** * Fix for nginx system. * * @since 1.0 */ protected function fix_nginx() { global $wp_settings_errors; secupress_activate_submodule( 'file-system', 'bad-file-extensions' ); // Get the error. $last_error = is_array( $wp_settings_errors ) && $wp_settings_errors ? end( $wp_settings_errors ) : false; $rules = '<code>Error</code>'; if ( $last_error && 'general' === $last_error['setting'] && 'nginx_manual_edit' === $last_error['code'] ) { $rules = static::get_rules_from_error( $last_error ); array_pop( $wp_settings_errors ); } // "cantfix" $this->add_fix_message( 300, array( $rules ) ); } /** Tools. ================================================================================== */ /** * Create a test file in the uploads folder. Also set the test file path and URL. * * @since 1.0 */ protected function create_file() { $wp_filesystem = secupress_get_filesystem(); $uploads = wp_upload_dir( null, false ); $basedir = wp_normalize_path( $uploads['basedir'] ); $extensions = secupress_bad_file_extensions_get_forbidden_extensions(); // Get the file name. $file_ext = mt_rand( 0, count( $extensions ) - 1 ); $file_ext = $extensions[ $file_ext ]; $file_name = 'secupress-temporary-file-' . secupress_generate_hash( 'file_name', 2, 6 ) . '.' . $file_ext; $file_path = $basedir . '/' . $file_name; // Create the file. if ( file_exists( $file_path ) ) { $wp_filesystem->delete( $file_path ); } if ( ! file_exists( $basedir ) ) { $wp_filesystem->mkdir( $basedir, FS_CHMOD_DIR ); } if ( file_exists( $file_path ) || ! file_exists( $basedir ) ) { return; } $created = $wp_filesystem->put_contents( $file_path, 'Temporary file', FS_CHMOD_FILE ); if ( $created ) { $this->file_path = $file_path; $this->file_url = trailingslashit( $uploads['baseurl'] ) . $file_name; } } /** * Delete a file. * * @since 1.0 */ protected function delete_file() { secupress_get_filesystem()->delete( $this->file_path ); $this->file_path = false; $this->file_url = false; } } Submit