[Security-news] SA-CONTRIB-2014-047 - Zen - Cross Site Scripting

[security-news at drupal.org]

View online: https://drupal.org/node/2254925

   * Advisory ID: DRUPAL-SA-CONTRIB-2014-047
   * Project: Zen [1] (third-party theme)
   * Version: 7.x
   * Date: 2014-April-30
   * Security risk: Moderately critical [2]
   * Exploitable from: Remote
   * Vulnerability: Cross Site Scripting

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

The Zen theme is a powerful, yet simple, HTML5 starting theme with a
responsive, mobile-first grid design.

The theme does not properly sanitize theme settings before they are used in
the output of a page. Custom themes that have copied Zen's template files
(e.g. subthemes) may suffer from this same issue. If your theme creates
variables in a preprocess using text from a custom theme setting, like this:

$variables['skip_link_text'] = theme_get_setting('skip_link_text');

you can prevent malicious XSS attacks by modifying the code to look like
this:

$variables['skip_link_text'] =
check_plain(theme_get_setting('skip_link_text'));

This vulnerability is mitigated by the fact that an attacker must have a role
with the permission "administer theme".


-------- CVE IDENTIFIER(S) ISSUED
--------------------------------------------

   * /A CVE identifier [3] will be requested, and added upon issuance, in
     accordance with Drupal Security Team processes./

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

   * Zen 7.x-5.x versions prior to 7.x-5.5.
   * Zen 7.x-3.x versions prior to 7.x-3.3.

Drupal core is not affected. If you do not use the contributed Zen [4] theme,
there is nothing you need to do.

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

Install the latest version:

   * If you use the Zen theme for Drupal 7.x, upgrade to Zen 7.x-3.3 [5] or 
Zen
     7.x-5.5 [6]

Also see the Zen [7] project page.

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

   * Dennis Walgaard [8]

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

   * Dennis Walgaard [9]
   * John Albin Wilkins [10] the theme maintainer

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

   * Greg Knaddison [11] 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 [12].

Learn more about the Drupal Security team and their policies [13], writing
secure code for Drupal [14], and securing your site [15].

Follow the Drupal Security Team on Twitter at
https://twitter.com/drupalsecurity [16]


[1] http://drupal.org/project/zen
[2] http://drupal.org/security-team/risk-levels
[3] http://cve.mitre.org/
[4] http://drupal.org/project/zen
[5] https://drupal.org/node/2254835
[6] https://drupal.org/node/2254837
[7] http://drupal.org/project/zen
[8] https://drupal.org/user/883702
[9] https://drupal.org/user/883702
[10] http://drupal.org/user/32095
[11] http://drupal.org/user/36762
[12] http://drupal.org/contact
[13] http://drupal.org/security-team
[14] http://drupal.org/writing-secure-code
[15] http://drupal.org/security/secure-configuration
[16] https://twitter.com/drupalsecurity