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asciitohex/wordpress-hardening-techniques.md

Forked from tlongren/wordpress-hardening-techniques.md
Created March 8, 2024 09:27
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WordPress Hardening
Raw
class-limit-login-attempts.php
<?php
/**
* CLASS LIMIT LOGIN ATTEMPTS
* Prevent Mass WordPress Login Attacks by setting locking the system when login fail.
* To be added in functions.php or as an external file.
*/
if ( ! class_exists( 'Limit_Login_Attempts' ) ) {
class Limit_Login_Attempts {
var $failed_login_limit = 3; //Number of authentification accepted
var $lockout_duration = 1800; //Stop authentification process for 30 minutes: 60*30 = 1800
var $transient_name = 'attempted_login'; //Transient used
public function __construct() {
add_filter( 'authenticate', array( $this, 'check_attempted_login' ), 30, 3 );
add_action( 'wp_login_failed', array( $this, 'login_failed' ), 10, 1 );
}
/**
* Lock login attempts of failed login limit is reached
*/
public function check_attempted_login( $user, $username, $password ) {
if ( get_transient( $this->transient_name ) ) {
$datas = get_transient( $this->transient_name );
if ( $datas['tried'] >= $this->failed_login_limit ) {
$until = get_option( '_transient_timeout_' . $this->transient_name );
$time = $this->when( $until );
return new WP_Error( 'too_many_tried', sprintf( __( '<strong>ERROR</strong>: You have reached authentification limit, you will be able to try again in %1$s.' ) , $time ) );
}
}
return $user;
}
/**
* Add transient
*/
public function login_failed( $username ) {
if ( get_transient( $this->transient_name ) ) {
$datas = get_transient( $this->transient_name );
$datas['tried']++;
if ( $datas['tried'] <= $this->failed_login_limit )
set_transient( $this->transient_name, $datas , $this->lockout_duration );
} else {
$datas = array(
'tried' => 1
);
set_transient( $this->transient_name, $datas , $this->lockout_duration );
}
}
/**
* Return difference between 2 given dates
* @param int $time Date as Unix timestamp
* @return string Return string
*/
private function when( $time ) {
if ( ! $time )
return;
$right_now = time();
$diff = abs( $right_now - $time );
$second = 1;
$minute = $second * 60;
$hour = $minute * 60;
$day = $hour * 24;
if ( $diff < $minute )
return floor( $diff / $second ) . ' secondes';
if ( $diff < $minute * 2 )
return "about 1 minute ago";
if ( $diff < $hour )
return floor( $diff / $minute ) . ' minutes';
if ( $diff < $hour * 2 )
return 'about 1 hour';
return floor( $diff / $hour ) . ' hours';
}
}
}
//Enable it:
new Limit_Login_Attempts();
?>
Raw
things-to-do.md

1. Add keys to wp-config.php

2. Hide .htaccess

<Files .htaccess>
order allow,deny
deny from all
</Files>

3. Move wp-config.php to another location and create a new wp-config.php to include it

<?php
define('ABSPATH', dirname(__FILE__) . '/');
require_once(ABSPATH . '../path/to/wp-config.php');

4. Disable file editing in wp-config.php

define('DISALLOW_FILE_EDIT', true);

5. Disable access to wp-includes

# Block wp-includes folder and files
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^wp-admin/includes/ - [F,L]
RewriteRule !^wp-includes/ - [S=3]
RewriteRule ^wp-includes/[^/]+\.php$ - [F,L]
RewriteRule ^wp-includes/js/tinymce/langs/.+\.php - [F,L]
RewriteRule ^wp-includes/theme-compat/ - [F,L]
</IfModule>

6. Prevent username enumeration

RewriteCond %{QUERY_STRING} author=d
RewriteRule ^ /? [L,R=301]

7. Prevent script injections

Options +FollowSymLinks
RewriteEngine On
RewriteCond %{QUERY_STRING} (<|%3C).*script.*(>|%3E) [NC,OR]
RewriteCond %{QUERY_STRING} GLOBALS(=|[|%[0-9A-Z]{0,2}) [OR]
RewriteCond %{QUERY_STRING} _REQUEST(=|[|%[0-9A-Z]{0,2})
RewriteRule ^(.*)$ index.php [F,L]
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