Protect WordPress Against Malicious URL Requests
In early September, many WordPress sites were infected with Malicious codes. We wrote a quick fix for that issue which you can see in this post, but recently Jeff Starr from Perishable Press has come with a solution to protect WordPress from future attacks as well.
Simply open a new php file and paste the following codes:
<?php
/*
Plugin Name: Block Bad Queries
Plugin URI: http://perishablepress.com/press/2009/12/22/protect-wordpress-against-malicious-url-requests/
Description: Protect WordPress Against Malicious URL Requests
Author URI: http://perishablepress.com/
Author: Perishable Press
Version: 1.0
*/
global $user_ID; if($user_ID) {
if(!current_user_can( level_10 )) {
if (strlen($_SERVER[ REQUEST_URI ]) > 255 ||
strpos($_SERVER[ REQUEST_URI ], eval( ) ||
strpos($_SERVER[ REQUEST_URI ], CONCAT ) ||
strpos($_SERVER[ REQUEST_URI ], UNION SELECT ) ||
strpos($_SERVER[ REQUEST_URI ], base64 )) {
@header( HTTP/1.1 414 Request-URI Too Long );
@header( Status: 414 Request-URI Too Long );
@header( Connection: Close );
@exit;
}
}
} ?>
Codes updated on Jan. 10, 2010.
Save this file and upload it in your plugin directory /wp-content/plugins/ and your work is done. This script will check for long strings as well as base64 code which was in the last attack and the eval( code which could be a threat in the future.
Once active, this plugin will silently and effectively close any connections for these sorts of injection-type attacks.
Source: Perishable Press
