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                                    CERT-Renater

                         Note d'Information No. 2011/VULN261
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DATE                      : 25/03/2011

HARDWARE PLATFORM(S)      : /

OPERATING SYSTEM(S)       : Systems running Webform Block for DRUPAL.

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http://drupal.org/node/1103122
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   * Advisory ID: DRUPAL-SA-CONTRIB-2011-014
   * Project: Webform Block (third-party module)
   * Version: 6.x
   * Date: 2011-March-23
   * Security risk: Moderately critical (definition of risk levels) [1]
   * Exploitable from: Remote
   * Vulnerability: Cross Site Scripting

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

The Webform Block module enables users to make a webform available as a
block. The module does not sanitize some of the user-supplied data before
displaying it, leading to a Cross Site Scripting (XSS [2]) vulnerability that
may lead to a malicious user gaining full administrative access. The
vulnerability is mitigated by the fact that a malicious user must be assigned
a role that includes permission to create and/or edit webforms.

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

   * Webform Block module for Drupal 6.x versions prior to 6.x-1.2

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

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

Install the latest version:
   * If you use the Webform Block module for Drupal 6.x upgrade to Webform
     Block 6.x-1.2 [4]

See also the Webform Block project page [5].

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

   * Dylan Wilder-Tack (grendzy [6]) of the Drupal security team

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

   * Dylan Wilder-Tack (grendzy [7]) of the Drupal security team
   * Mike Carter (budda [8]), module maintainer

- -------- 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. Learn more about the team and
their policies [9], writing secure code for Drupal [10], and secure
configuration [11] of your site.

[1] http://drupal.org/security-team/risk-levels
[2] http://en.wikipedia.org/wiki/Cross-site_scripting
[3] http://drupal.org/project/webformblock
[4] http://drupal.org/node/1101996
[5] http://drupal.org/project/webformblock
[6] http://drupal.org/user/96647
[7] http://drupal.org/user/96647
[8] http://drupal.org/user/13164
[9] http://drupal.org/security-team
[10] http://drupal.org/writing-secure-code
[11] http://drupal.org/security/secure-configuration


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