SA-CONTRIB-2013-083 - Quiz - Access Bypass

Access bypass on deleting quiz results

The Quiz module provides tools for authoring and administering quizzes through Drupal. A quiz is given as a series of questions, with only one question appearing per page. Scores are then stored in the database.

The module doesn’t sufficiently check the delete quiz results permission. All users who have the permission to view Quiz results can access the delete option in the results page irrespective of “delete any quiz results” and “delete results for own quiz” permissions.

This vulnerability is mitigated by the fact that an attacker must have a role with the permission “view any quiz results” or “view results for own quiz”.

Access bypass in viewing quiz views

The Quiz module has Views integration including default Views. These default views provided by the module do not have proper access control. If the Views are enabled and the access controls are left unchanged then information about users quiz results may be disclosed.

CVE identifier(s) issued

• CVE-2013-4500 (Access bypass on deleting quiz results)
• CVE-2013-4501 (Access bypass on viewing quiz Views)

Versions affected

• Quiz 6.x-4.x versions prior to 6.x-4.5.

Drupal core is not affected. If you do not use the contributed Quiz module, there is nothing you need to do.

Solution

Install the latest version:

• If you use the Quiz module for Drupal 6.x, upgrade to Quiz 6.x-4.5
• For both versions: Review the Quiz results view and delete permissions and ensure it is working as expected for intended users

Also see the Quiz project page.

Reported by

• nirvanajyothi
• Cat Hirst

Fixed by

• Wouter Admiraal
• Sivaji Ganesh the module co-maintainer
• Falcon the module maintainer

Coordinated by

• Dan Smith, Jakub Suchy, Ned McClain, Greg Knaddison of the Drupal Security Team