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