Home page logo
/

bugtraq logo Bugtraq mailing list archives

WordPress 3.5.1, Denial of Service
From: Krzysztof Katowicz-Kowalewski <vnd () vndh net>
Date: Fri, 7 Jun 2013 18:29:48 +0200

Version 3.5.1 (latest) of popular blogging engine WordPress suffers from remote denial of service vulnerability. The 
bug exists in encryption module (class-phpass.php). The exploitation of this vulnerability is possible only when at 
least one post is protected by a password.

Time frames:
31.05.2013 WordPress security team has been informed about the vulnerability (no response).
07.06.2013 The vulnerability has been released to the public.

More information (including proof of concept):
https://vndh.net/note:wordpress-351-denial-service

A way out (before official WordPress update) to secure existing installations is to apply the following patch:

--- wp-includes/class-phpass.php
+++ wp-includes/class-phpass.php
@@ -120,7 +120,7 @@
                        return $output;
 
                $count_log2 = strpos($this->itoa64, $setting[3]);
-               if ($count_log2 < 7 || $count_log2 > 30)
+               if ($count_log2 < 7 || $count_log2 > 13)
                        return $output;
 
                $count = 1 << $count_log2;

Attachment: signature.asc
Description: Message signed with OpenPGP using GPGMail


  By Date           By Thread  

Current thread:
[ Nmap | Sec Tools | Mailing Lists | Site News | About/Contact | Advertising | Privacy ]