[Security-news] SA-CONTRIB-2014-118 - Administer Users by Role - Access Bypass - Unsupported

[security-news at drupal.org]

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