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