Drupal Block Class Module 'Class' Field HTML Injection Vulnerability

Bugtraq ID:	52341
Class:	Input Validation Error
CVE:
Remote:	Yes
Local:	No
Published:	Mar 07 2012 12:00AM
Updated:	Mar 07 2012 12:00AM
Credit:	Katherine Senzee
Vulnerable:	Drupal Block Class 6.x-1.3 Drupal Block Class 6.x-1.2 Drupal Block Class 6.x-1.1 Drupal Block Class 5.x-1.1 Drupal Block Class 5.x-1.0
Not Vulnerable:	Drupal Block Class 7.x-1.1 Drupal Block Class 7.x-1.0

Drupal Block Class Module 'Class' Field HTML Injection Vulnerability

The Block Class module for Drupal is prone to an HTML-injection vulnerability because it fails to properly sanitize user-supplied input before using it in dynamically generated content.

Successful exploits will allow attacker-supplied HTML and script code to run in the context of the affected browser, potentially allowing the attacker to steal cookie-based authentication credentials or control how the site is rendered to the user. Other attacks are also possible.

Versions prior to Block Class 7.x-1.0 are vulnerable.

Drupal Block Class Module 'Class' Field HTML Injection Vulnerability

Attackers can use a browser to exploit this issue.

Drupal Block Class Module 'Class' Field HTML Injection Vulnerability

Solution:
Updates are available. Please see the references for details.


Drupal Block Class 6.x-1.1

• Drupal block_class 7.x-1.1
  http://drupal.org/node/1471090

Drupal Block Class 5.x-1.1

• Drupal block_class 7.x-1.1
  http://drupal.org/node/1471090

Drupal Block Class 5.x-1.0

• Drupal block_class 7.x-1.1
  http://drupal.org/node/1471090

Drupal Block Class 6.x-1.3

• Drupal block_class 7.x-1.1
  http://drupal.org/node/1471090

Drupal Block Class 6.x-1.2

• Drupal block_class 7.x-1.1
  http://drupal.org/node/1471090

Drupal Block Class Module 'Class' Field HTML Injection Vulnerability

References:

• Drupal Homepage (Drupal)
  
• SA-CONTRIB-2012-032 - Block Class - Cross Site scripting (Drupal)