View online: https://www.drupal.org/node/2390687 * Advisory ID: DRUPAL-SA-CONTRIB-2014-118 * Project: Administer Users by Role [1] (third-party module) * Version: 6.x * Date: 2014-December-10 * Security risk: 11/25 ( Moderately Critical) AC:Complex/A:Admin/CI:None/II:All/E:Proof/TD:Default [2] * Vulnerability: Access bypass -------- DESCRIPTION --------------------------------------------------------- This module enables site builders to set up fine-grained permissions for allowing users to edit and delete other users. The module doesn't sufficiently validate access permissions, enabling users who supposedly have limited permissions to grant themselves more permissions. This vulnerability is mitigated by the fact that an attacker must have a role with the permission "administer users". While this is usually a permission only granted to trusted users the Administer Users by Role module intends to limit the permission so that users cannot elevate their own permissions, but it fails to do so in certain scenarios. -------- CVE IDENTIFIER(S) ISSUED -------------------------------------------- * /A CVE identifier [3] will be requested, and added upon issuance, in accordance with Drupal Security Team processes./ -------- VERSIONS AFFECTED --------------------------------------------------- * administerusersbyrole 6.x - all versions Drupal core is not affected. If you do not use the contributed Administer Users by Role [4] module, there is nothing you need to do. -------- SOLUTION ------------------------------------------------------------ * If you use the administerusersbyrole module for Drupal 6.x, disable and uninstall the module Also see the Administer Users by Role [5] project page. -------- REPORTED BY --------------------------------------------------------- * Adam Shepherd [6] -------- FIXED BY ------------------------------------------------------------ not applicable. -------- COORDINATED BY ------------------------------------------------------ * Klaus Purer [7] 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 https://www.drupal.org/contact [8]. Learn more about the Drupal Security team and their policies [9], writing secure code for Drupal [10], and securing your site [11]. Follow the Drupal Security Team on Twitter at https://twitter.com/drupalsecurity [12] [1] https://www.drupal.org/project/administerusersbyrole [2] https://www.drupal.org/security-team/risk-levels [3] http://cve.mitre.org/ [4] https://www.drupal.org/project/administerusersbyrole [5] https://www.drupal.org/project/administerusersbyrole [6] https://www.drupal.org/u/adamps [7] https://www.drupal.org/u/klausi [8] https://www.drupal.org/contact [9] https://www.drupal.org/security-team [10] https://www.drupal.org/writing-secure-code [11] https://www.drupal.org/security/secure-configuration [12] https://twitter.com/drupalsecurity