[Security-news] SA-CONTRIB-2011-020 - Taxonomy Access Control Lite (tac_lite) - Cross Site Scripting

[security-news at drupal.org]

  * Advisory ID: DRUPAL-SA-CONTRIB-2010-020
  * Project: Taxonomy Access Control Lite [1] (third-party module)
  * Version: 6.x
  * Date: 2010-MAY-11
  * Security risk: Less critical [2]
  * Exploitable from: Remote
  * Vulnerability: Cross Site Scripting

-------- DESCRIPTION  
---------------------------------------------------------

The tac_lite module allows site administrators to hide nodes and taxonomy
terms from users without permission to view them. The permission to view
terms can be granted to a specific user, or all users with a specific role.

The module doesn't sufficiently strip markup when rendering taxonomy names,
leading to a Cross Site Scripting (XSS [3]) vulnerability that may lead to a
malicious user gaining full administrative access.

This vulnerability is mitigated by the fact that an attacker must have a role
with the permission "administer taxonomy". Only users with the permission
"administer tac_lite" are vulnerable to the attack.

-------- VERSIONS AFFECTED  
---------------------------------------------------

  * tac_lite 6.x-1.4 and earlier

Drupal core is not affected. If you do not use the contributed Taxonomy
Access Control Lite [4] module, there is nothing you need to do.

-------- SOLUTION  
------------------------------------------------------------

Install the latest version:

  * If you use the tac_lite module for Drupal 6.x upgrade to tac_lite 6.x-1.5
    [5]

See also the Taxonomy Access Control Lite [6] project page.

-------- REPORTED BY  
---------------------------------------------------------

  * AlexisWilke [7]

-------- FIXED BY  
------------------------------------------------------------

  * Dave Cohen [8] the module maintainer
  * Stéphane Corlosquet [9] 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 http://drupal.org/contact [10].

Learn more about the Drupal Security team and their policies [11], writing
secure code for Drupal [12], and securing your site [13].


[1] http://drupal.org/project/tac_lite
[2] http://drupal.org/security-team/risk-levels
[3] http://en.wikipedia.org/wiki/Cross-site_scripting
[4] http://drupal.org/project/tac_lite
[5] http://drupal.org/node/1154232
[6] http://drupal.org/project/tac_lite
[7] http://drupal.org/user/356197
[8] http://drupal.org/user/18468
[9] http://drupal.org/user/52142
[10] http://drupal.org/contact
[11] http://drupal.org/security-team
[12] http://drupal.org/writing-secure-code
[13] http://drupal.org/security/secure-configuration