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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.
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):
A way out (before official WordPress update) to secure existing installations is to apply the following patch:
@@ -120,7 +120,7 @@
$count_log2 = strpos($this->itoa64, $setting);
- if ($count_log2 < 7 || $count_log2 > 30)
+ if ($count_log2 < 7 || $count_log2 > 13)
$count = 1 << $count_log2;
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- WordPress 3.5.1, Denial of Service Krzysztof Katowicz-Kowalewski (Jun 11)