Ubuntu
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' ),
'' . __( 'Bad File Extensions', 'secupress' ) . '',
'' . __( 'Malware Scan', 'secupress' ) . ''
);
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' ),
'' . __( 'Bad File Extensions', 'secupress' ) . '',
'' . __( 'Malware Scan', 'secupress' ) . ''
);
$messages = array(
// "good"
0 => __( 'Files that use bad extensions are protected.', 'secupress' ),
/** Translators: %s is a file name. */
1 => sprintf( __( 'The rules forbidding access to files that use bad extensions have been successfully added to your %s file.', 'secupress' ), "$config_file" ),
// "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' ) . ' ' . $activate_protection_message,
201 => __( 'Whether or not you have files using bad extensions in the uploads folder, those files are accessible directly.', 'secupress' ),
// "cantfix"
/** Translators: 1 is a file name, 2 is some code. */
300 => sprintf( __( 'Your server runs Nginx, the files that use bad extensions cannot be protected automatically but you can do it yourself by adding the following code to your %1$s file: %2$s', 'secupress' ), 'nginx.conf', '%s' ),
301 => __( 'Your server runs an unrecognized system. The files that use bad extensions cannot be protected automatically.', 'secupress' ),
/** Translators: 1 is a file name, 2 is some code. */
302 => sprintf( __( 'Your %1$s file is not writable. Please add the following lines at the beginning of the file: %2$s', 'secupress' ), "$config_file", '%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$s', 'secupress' ), "$config_file", '%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' => ' ' ];
}
/**
* 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 = 'Error';
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;
}
}