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             AUSCERT External Security Bulletin Redistribution

            A vulnerability has been identified in Drupal core
                             21 February 2013


        AusCERT Security Bulletin Summary

Product:           Drupal
Publisher:         Drupal
Operating System:  UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade

Original Bulletin: 

- --------------------------BEGIN INCLUDED TEXT--------------------

  * Advisory ID: DRUPAL-SA-CORE-2013-002
  * Project: Drupal core [1]
  * Version: 7.x
  * Date: 2013-February-20
  * Security risk: Critical [2]
  * Exploitable from: Remote
  * Vulnerability: Denial of service

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

Drupal core's Image module allows for the on-demand generation of image
derivatives. This capability can be abused by requesting a large number of
new derivatives which can fill up the server disk space, and which can cause
a very high CPU load. Either of these effects may lead to the site becoming
unavailable or unresponsive.

Please see the Drupal 7.20 release notes [3] for important notes about the
changes which were made to fix this issue, since some sites will require
extra testing and care when deploying this Drupal core release.

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

  * /A CVE identifier [4] will be requested, and added upon issuance, in
    accordance with Drupal Security Team processes./

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

  * Drupal core 7.x versions prior to 7.20.

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

Install the latest version:

  * If you use Drupal 7.x, upgrade to Drupal core 7.20 [5].

Also see the Drupal core [6] project page.

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

  * Bèr Kessels [7]
  * aBrookland [8]
  * Chad Fennell [9]

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

  * Damien Tournoud [10] of the Drupal Security Team
  * Peter Wolanin [11] of the Drupal Security Team
  * David Rothstein [12] of the Drupal Security Team
  * Heine Deelstra [13] of the Drupal Security Team
  * Bèr Kessels [14]

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

  * David Rothstein [15] of the Drupal Security Team
  * Stéphane Corlosquet [16] of the Drupal Security Team
  * Peter Wolanin [17] of the Drupal Security Team
  * Greg Knaddison [18] 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 [19].

Learn more about the Drupal Security team and their policies [20], writing
secure code for Drupal [21], and securing your site [22].

[1] http://drupal.org/project/drupal
[2] http://drupal.org/security-team/risk-levels
[3] http://drupal.org/drupal-7.20-release-notes
[4] http://cve.mitre.org/
[5] http://drupal.org/drupal-7.20-release-notes
[6] http://drupal.org/project/drupal
[7] http://drupal.org/user/2663
[8] http://drupal.org/user/2274988
[9] http://drupal.org/user/10297
[10] http://drupal.org/user/22211
[11] http://drupal.org/user/49851
[12] http://drupal.org/user/124982
[13] http://drupal.org/user/17943
[14] http://drupal.org/user/2663
[15] http://drupal.org/user/124982
[16] http://drupal.org/user/52142
[17] http://drupal.org/user/49851
[18] http://drupal.org/user/36762
[19] http://drupal.org/contact
[20] http://drupal.org/security-team
[21] http://drupal.org/writing-secure-code
[22] http://drupal.org/security/secure-configuration

- --------------------------END INCLUDED TEXT--------------------

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