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By Drupal Security Team on
- Advisory ID: DRUPAL-SA-CONTRIB-2014-026
- Project: Mime Mail (third-party module)
- Version: 6.x, 7.x
- Date: 2014-February-26
- Security risk: Not critical
- Exploitable from: Remote
- Vulnerability: Access bypass
Description
The MIME Mail module allows processing of incoming MIME-encoded e-mail messages with embedded images and attachments.
The default key for the authentication of incoming messages is generated from a random number. On some platforms (such as Windows) the maximum value of this number is only 32767 which makes the generated key particularly vulnerable to a brute force attack.
This vulnerability is mitigated by the fact that the processing of incoming messages needs to be enabled on the site and the default key can be arbitrary changed by the site administrator.
CVE identifier(s) issued
- A CVE identifier will be requested, and added upon issuance, in accordance with Drupal Security Team processes.
Versions affected
- Mime Mail 6.x-1.x versions prior to 6.x-1.3.
- Mime Mail 7.x-1.x versions prior to 7.x-1.0-beta2.
Drupal core is not affected. If you do not use the contributed Mime Mail module, there is nothing you need to do.
Solution
Install the latest version:
- If you use the Mime Mail module for Drupal 6.x, upgrade to Mime Mail 6.x-1.3
- If you use the Mime Mail module for Drupal 7.x, upgrade to Mime Mail 7.x-1.0-beta2
These releases include a stronger authentication process for incoming messages which is backward incompatible. If you are using this feature, make sure to use the HMAC method with the new key generated during the update process to authenticate your messages.
Also see the Mime Mail project page.
Reported by
- Heine Deelstra of the Drupal Security Team
Fixed by
- Gabor Seljan the module maintainer
- Rick Maneliusprovisional Drupal Security Team member
Coordinated by
- Hunter Fox of the Drupal Security Team
- Rick Manelius provisional Drupal Security Team member.
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 Drupal Security team and their policies, writing secure code for Drupal, and securing your site.
Follow the Drupal Security Team on Twitter at https://twitter.com/drupalsecurity
