View online: http://drupal.org/node/1762496

* Advisory ID: DRUPAL-SA-CONTRIB-2012-135 * Project: CAPTCHA [1] (third-party module) * Version: 6.x * Date: 2011-August-29 * Security risk: Less critical [2] * Exploitable from: Remote * Vulnerability: Access bypass

-------- DESCRIPTION ---------------------------------------------------------

This module enables you to protect website forms using a CAPTCHA. A CAPTCHA is a test which attempts to differentiate between a human and an automated bot or script.

The module doesn't ensure that test submissions have a single-use unique token. This means that web robots could reuse a single successful submission multiple times, reducing the effectiveness of the protection.

CVE: Requested

-------- VERSIONS AFFECTED ---------------------------------------------------

* CAPTCHA 6.x-2.x versions prior to 6.x-2.3

Drupal core is not affected. If you do not use the contributed CAPTCHA [3] module, there is nothing you need to do.

-------- SOLUTION ------------------------------------------------------------

Install the latest version:

* If you use the CAPTCHA module for Drupal 6.x, upgrade to CAPTCHA 6.x-2.3 [4] or greater

Also see the CAPTCHA [5] project page.

-------- REPORTED BY ---------------------------------------------------------

* LeeSai [6] * MustLive

-------- FIXED BY ------------------------------------------------------------

* Stefaan Lippens [7] a CAPTCHA module maintainer

-------- COORDINATED BY ------------------------------------------------------

* Owen Barton [8] of the Drupal Security Team * Greg Knaddison [9] of the Drupal Security Team

-------- CONTACT AND MORE INFORMATION ----------------------------------------

The Drupal security team can be reached at security at drupal.org or via the contact form at http://drupal.org/contact [10].

Learn more about the Drupal Security team and their policies [11], writing secure code for Drupal [12], and securing your site [13].

[1] http://drupal.org/project/captcha [2] http://drupal.org/security-team/risk-levels [3] http://drupal.org/project/captcha [4] http://drupal.org/node/967244 [5] http://drupal.org/project/captcha [6] http://drupal.org/user/680166 [7] http://drupal.org/user/41478 [8] http://drupal.org/user/19668 [9] http://drupal.org/user/36762 [10] http://drupal.org/contact [11] http://drupal.org/security-team [12] http://drupal.org/writing-secure-code [13] http://drupal.org/security/secure-configuration