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By Drupal Security Team on
- Advisory ID: DRUPAL-SA-CONTRIB-2012-135
- Project: CAPTCHA (third-party module)
- Version: 6.x
- Date: 2012-August-29
- Security risk: Less critical
- 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 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 or greater
Also see the CAPTCHA project page.
Reported by
- LeeSai
- MustLive
Fixed by
- Stefaan Lippens a CAPTCHA module maintainer
Coordinated by
- Owen Barton of the Drupal Security Team
- Greg Knaddison 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.
Learn more about the Drupal Security team and their policies, writing secure code for Drupal, and securing your site.
