Ubuntu
title = __( 'Check if your website is vulnerable to Shellshock.', 'secupress' );
$this->more = __( 'Shellshock is a critic vulnerability allowing an attacker to remotely execute malicious code on a server.', 'secupress' );
$this->more_fix = sprintf(
__( 'Activate the option %1$s in the %2$s module.', 'secupress' ),
'' . __( 'Block Bad User-Agents', 'secupress' ) . '',
'' . __( 'Firewall', 'secupress' ) . ''
);
}
/**
* Get messages.
*
* @since 1.1.4
*
* @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 ) {
/** 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' ),
'' . __( 'Block Bad User-Agents', 'secupress' ) . '',
'' . __( 'Firewall', 'secupress' ) . ''
);
$messages = array(
// "good"
0 => __( 'The server is not vulnerable to Shellshock.', 'secupress' ),
1 => __( 'The protection against Shellshock has been activated. It won\'t fix the vulnerability (only your host can) but it will prevent an attacker to exploit it remotely.', 'secupress' ),
// "warning"
100 => sprintf( __( 'Unable to determine the status of the Shellshock flaw (%s).', 'secupress' ), 'CVE-2014-6271' ) . ' ' . $activate_protection_message,
101 => sprintf( __( 'Unable to determine the status of the Shellshock flaw (%s).', 'secupress' ), 'CVE-2014-7169' ) . ' ' . $activate_protection_message,
102 => __( 'Unable to determine the status of the Shellshock flaw.', 'secupress' ) . ' ' . $activate_protection_message,
// "bad"
200 => sprintf( __( 'The server appears to be vulnerable to Shellshock (%s).', 'secupress' ), 'CVE-2014-6271' ),
201 => sprintf( __( 'The server appears to be vulnerable to Shellshock (%s).', 'secupress' ), 'CVE-2014-7169' ),
202 => __( 'The server may be vulnerable to Shellshock.', 'secupress' ),
);
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 __( 'http://docs.secupress.me/article/115-shellshock-scan', 'secupress' );
}
/** Scan. =================================================================================== */
/**
* Scan for flaw(s).
*
* @since 1.1.4
*
* @return (array) The scan results.
*/
public function scan() {
$activated = secupress_filter_scanner( __CLASS__ );
if ( true === $activated ) {
$this->add_message( 0 );
return parent::scan();
}
if ( 'WIN' === strtoupper( substr( PHP_OS, 0, 3 ) ) ) {
// "good"
$this->add_message( 0 );
return parent::scan();
}
if ( ! secupress_is_function_disabled( 'proc_open' ) ) {
// Scan with `proc_open()`.
$env = array( 'SHELL_SHOCK_TEST' => '() { :;}; echo VULNERABLE' );
$desc = array(
0 => array( 'pipe', 'r' ),
1 => array( 'pipe', 'w' ),
2 => array( 'pipe', 'w' ),
);
// CVE-2014-6271.
$p = proc_open( 'bash -c "echo Test"', $desc, $pipes, null, $env );
$output = isset( $pipes[1] ) ? stream_get_contents( $pipes[1] ) : 'error';
proc_close( $p );
if ( false !== strpos( $output, 'VULNERABLE' ) ) {
// "bad"
$this->add_message( 200 );
}
// CVE-2014-7169.
$test_date = date( 'Y' );
$p = proc_open( "rm -f echo; env 'x=() { (a)=>\' bash -c \"echo date +%Y\"; cat echo", $desc, $pipes, sys_get_temp_dir() );
$output = isset( $pipes[1] ) ? stream_get_contents( $pipes[1] ) : 'error';
proc_close( $p );
if ( trim( $output ) === $test_date ) {
// "bad"
$this->add_message( 201 );
}
} else {
// Scan by altering the User-Agent.
$request_args = $this->get_default_request_args();
$request_args['user-agent'] = '() { :;}; echo VULNERABLE';
$response = wp_remote_get( add_query_arg( secupress_generate_key( 6 ), secupress_generate_key( 8 ), user_trailingslashit( home_url() ) ), $request_args );
if ( ! is_wp_error( $response ) ) {
if ( 200 === wp_remote_retrieve_response_code( $response ) ) {
// "bad"
$this->add_message( 202 );
} else {
// "good"
$this->add_message( 0 );
}
}
}
// "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 1.1.4
*
* @return (array) The fix results.
*/
public function fix() {
// Activate.
secupress_activate_submodule( 'firewall', 'user-agents-header' );
// "good"
$this->add_fix_message( 1 );
return parent::fix();
}
}