* Advisory ID: DRUPAL-SA-CONTRIB-2012-0XX * Project: MultiBlock [1] (third-party module) * Version: 6.x, 7.x * Date: 2012-March-28 * Security risk: Moderately critical [2] * Exploitable from: Remote * Vulnerability: Cross Site Scripting

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

The MultiBlock module allows an administrator to create multiple instances of blocks provided by other modules. The module does not properly sanitize the block title provided by a block administrator, leading to a cross-site scripting (XSS) vulnerability. Such an attack may lead to a malicious user gaining full administrative access. A user must have a role with the permission 'administer blocks' to exploit this vulnerability.

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

* MultiBlock 6.x-1.x versions prior to 6.x-1.4. * MultiBlock 7.x-1.x versions prior to 7.x-1.1.

Drupal core is not affected. If you do not use the contributed MultiBlock [3] module, there is nothing you need to do.

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

Install the latest version:

* If you use the MultiBlock module for Drupal 6.x, upgrade to MultiBlock 6.x-1.4 [4] * If you use the MultiBlock module for Drupal 7.x, upgrade to MultiBlock 7.x-1.1 [5]

Also see the MultiBlock [6] project page.

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

* Justin Klein Keane [7]

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

* Andrew Levine [8] the module maintainer

-------- COORDINATED BY ------------------------------------------------------

* Ivo Van Geertruyen [9] of the Drupal Security Team * Michael Hess [10] 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 [11].

Learn more about the Drupal Security team and their policies [12], writing secure code for Drupal [13], and securing your site [14].

[1] http://drupal.org/project/multiblock [2] http://drupal.org/security-team/risk-levels [3] http://drupal.org/project/multiblock [4] http://drupal.org/node/1505410 [5] http://drupal.org/node/1505414 [6] http://drupal.org/project/multiblock [7] http://drupal.org/user/302225 [8] http://drupal.org/user/49940 [9] http://drupal.org/user/383424 [10] http://drupal.org/user/102818 [11] http://drupal.org/contact [12] http://drupal.org/security-team [13] http://drupal.org/writing-secure-code [14] http://drupal.org/security/secure-configuration