* 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