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AUSCERT External Security Bulletin Redistribution
ESB-2021.1443
SAML Authentication - Moderately critical - Access bypass -
SA-CONTRIB-2021-006
29 April 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: Drupal
Publisher: Drupal
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Unauthorised Access -- Existing Account
Resolution: Patch/Upgrade
Original Bulletin:
https://www.drupal.org/sa-contrib-2021-006
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SAML Authentication - Moderately critical - Access bypass - SA-CONTRIB-2021-006
Project: SAML Authentication
Date: 2021-April-28
Security risk:
Moderately critical 14/25 AC:Basic/A:User/CI:Some/II:Some/E:Theoretical/TD:All
Vulnerability: Access bypass
Description:
The SAML Authentication module allows users to authenticate against a SAML
identity provider to login to your Drupal site.
The module doesn't sufficiently protect against unauthorized local access, by
way of using the 'password reset' facility, for users who are supposed to only
be able to log in through the identity provider. This creates a scenario where
after such a user is blocked from logging in through the identity provider but
not explicitly blocked in Drupal, they are still able to log in by sending
themselves a Drupal 'password reset' e-mail.
Solution:
Install the latest version:
o for all versions of Drupal 8/9, upgrade to samlauth 8.x-3.1.
o for Drupal 7, upgrade to samlauth 7.x-1.1.
Reported By:
o Bobby Gryzynger
o Mark Shropshire
Fixed By:
o Bobby Gryzynger
o Roderik Muit
o Jakob Perry
o Sascha Grossenbacher
o Cameron Eagans
o Drew Webber of the Drupal Security Team
Coordinated By:
o Greg Knaddison of the Drupal Security Team
Contact and more information
The Drupal security team can be reached by email at security at drupal.org or
via the contact form.
Learn more about the Drupal Security team and their policies, writing secure
code for Drupal, and securing your site.
Follow the Drupal Security Team on Twitter @drupalsecurity
Contributing organizations for this advisory
o Mediacurrent
o Acquia
o MD Systems
o Morris Animal Foundation
The security team is made up of volunteers around the world. The companies
above have sponsored time on this release.
Thank you to these Drupal contributors
Top Drupal contributor Acquia would like to thank their partners for their
contributions to Drupal.
Third and Grove
Acro Media
MediaCurrent
QED42
CI&T
FFW
Palantir.net
Lullabot
Four Kitchens
Phase 2
Srijan
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