Ricochet has been an invaluable partner in the development of our Drupal sites. Working with Casey, he lent a critical eye to our requirements to understand the feature set and objectives. During development, he was able to propose alternative implementations or creative solutions which met the requirements in an elegant and efficient manner. All the while, Casey maintained perspective on the user experience, to ensure that the product was not only bug free, but also easy to use an navigate. Furthermore, I could rely on Casey to keep me informed of issues and status with timely updates.
—Casey C., Future US

Advanced Varnish - Moderately critical - Access bypass - SA-CONTRIB-2024-033

Wed, 2024-08-28 08:32 — Anonymous (not verified)

Project: Advanced VarnishDate: 2024-August-28Security risk: Moderately critical 14∕25 AC:None/A:None/CI:Some/II:None/E:Theoretical/TD:DefaultVulnerability: Access bypassAffected versions: <4.0.11Description: This module enables you to cache pages for logged in users at the Varnish level.
The Varnish bin names may be guessable when no hashing noise configuration is set on the module configuration page, which would ultimately allow any user to view cached pages that were intended for other roles when guessing such a bin name.Solution: There are two steps. Install the latest version and update your configuration:

If you use the Advanced Varnish module for Drupal 4.0.x, upgrade to Advanced Varnish 4.0.11
Go to the module configuration page and set an appropriate value to the hashing noise configuration.

Reported By:

Heine Deelstra of the Drupal Security Team

Fixed By:

Heine Deelstra of the Drupal Security Team
Alexander Shumenko

Coordinated By:

Greg Knaddison of the Drupal Security Team

Path to article https://www.drupal.org/sa-contrib-2024-033

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Advanced Varnish - Moderately critical - Access bypass - SA-CONTRIB-2024-033