RESTful Web Services (RESTWS) - DoS

View online: http://drupal.org/node/1966780

  * Advisory ID: DRUPAL-SA-CONTRIB-2013-042
  * Project: RESTful Web Services [1] (third-party module)
  * Version: 7.x
  * Date: 2013-April-10
  * Security risk: Critical [2]
  * Exploitable from: Remote
  * Vulnerability: Denial of Service

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

This module enables you to expose Drupal entities as RESTful web services. It
provides a machine-readable interface to exchange resources in JSON, XML and
RDF.

The module interferes with Drupal's page cache and allows an attacker to
poison the cache with non-HTML page responses, thereby exposing a denial of
service vulnerability.

This vulnerability is mitigated by the fact that page caching must be enabled
and the anonymous user role must be assigned a RESTWS permission, for example
"access resource node".


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

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

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

  * RESTWS 7.x-1.x versions prior to 7.x-1.3.
  * RESTWS 7.x-2.x versions prior to 7.x-2.0-alpha5.

Drupal core is not affected. If you do not use the contributed RESTful Web
Services [4] module, there is nothing you need to do.

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

Install the latest version:

  * If you use the RESTWS 1.x module for Drupal 7.x, upgrade to RESTWS 7.x-1.3
    [5]
  * If you use the RESTWS 2.x module for Drupal 7.x, upgrade to RESTWS
    7.x-2.0-alpha5 [6]

Also see the RESTful Web Services [7] project page.

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

  * Dylan Tack [8] of the Drupal Security Team

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

  * Klaus Purer [9] the module maintainer
  * Stéphane Corlosquet [10] of the Drupal Security Team

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

  * Klaus Purer [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].


[1] http://drupal.org/project/restws
[2] http://drupal.org/security-team/risk-levels
[3] http://cve.mitre.org/
[4] http://drupal.org/project/restws
[5] http://drupal.org/node/1966752
[6] http://drupal.org/node/1966758
[7] http://drupal.org/project/restws
[8] http://drupal.org/user/96647
[9] http://drupal.org/user/262198
[10] http://drupal.org/user/52142
[11] http://drupal.org/user/262198
[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

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