View online: https://www.drupal.org/SA-CORE-2015-002

* Advisory ID: DRUPAL-SA-CORE-2015-002
* Project: Drupal core [1]
* Version: 6.x, 7.x
* Date: 2015-June-17
* Security risk: 15/25 ( Critical)
AC:Basic/A:None/CI:Some/II:Some/E:Theoretical/TD:Default [2]
* Vulnerability: Access bypass, Information Disclosure, Open Redirect,
Multiple vulnerabilities

——– DESCRIPTION
———————————————————

…. Impersonation (OpenID module – Drupal 6 and 7 – Critical)

A vulnerability was found in the OpenID module that allows a malicious user
to log in as other users on the site, including administrators, and hijack
their accounts.

This vulnerability is mitigated by the fact that the victim must have an
account with an associated OpenID identity from a particular set of OpenID
providers (including, but not limited to, Verisign, LiveJournal, or
StackExchange).

…. Open redirect (Field UI module – Drupal 7 – Less critical)

The Field UI module uses a “destinations” query string parameter in URLs to
redirect users to new destinations after completing an action on a few
administration pages. Under certain circumstances, malicious users can use
this parameter to construct a URL that will trick users into being redirected
to a 3rd party website, thereby exposing the users to potential social
engineering attacks.

This vulnerability is mitigated by the fact that only sites with the Field UI
module enabled are affected.

Drupal 6 core is not affected, but see the similar advisory for the Drupal 6
contributed CCK module: SA-CONTRIB-2015-126 [3]

…. Open redirect (Overlay module – Drupal 7 – Less critical)

The Overlay module displays administrative pages as a layer over the current
page (using JavaScript), rather than replacing the page in the browser
window. The Overlay module does not sufficiently validate URLs prior to
displaying their contents, leading to an open redirect vulnerability.

This vulnerability is mitigated by the fact that it can only be used against
site users who have the “Access the administrative overlay” permission, and
that the Overlay module must be enabled.

…. Information disclosure (Render cache system – Drupal 7 – Less critical)

On sites utilizing Drupal 7’s render cache system to cache content on the
site by user role, private content viewed by user 1 may be included in the
cache and exposed to non-privileged users.

This vulnerability is mitigated by the fact that render caching is not used
in Drupal 7 core itself (it requires custom code or the contributed Render
Cache [4] module to enable) and that it only affects sites that have user 1
browsing the live site. Exposure is also limited if an administrative role
has been assigned to the user 1 account (which is done, for example, by the
Standard install profile that ships with Drupal core).

——– CVE IDENTIFIER(S) ISSUED
——————————————–

* Impersonation (OpenID module – Drupal 6 and 7): *CVE-2015-3234*
* Open redirect (Field UI module – Drupal 7): *CVE-2015-3232*
* Open redirect (Overlay module – Drupal 7: *CVE-2015-3233*
* Information disclosure (Render cache system – Drupal 7): *CVE-2015-3231*

——– VERSIONS AFFECTED
—————————————————

* Drupal core 6.x versions prior to 6.36
* Drupal core 7.x versions prior to 7.38

——– SOLUTION
————————————————————

Install the latest version:

* If you use Drupal 6.x, upgrade to Drupal core 6.36 [5]
* If you use Drupal 7.x, upgrade to Drupal core 7.38 [6]

Also see the Drupal core [7] project page.

——– REPORTED BY
———————————————————

Impersonation in the OpenID module:

* Vladislav Mladenov
* Christian Mainka [8]
* Christian Koßmann [9]

Open redirect in the Field UI module:

* Michael Smith [10]

Open redirect in the Overlay module:

* Jeroen Vreuls [11]
* David Rothstein [12] of the Drupal Security Team

Information disclosure in the render cache system:

* Nathaniel Catchpole [13] of the Drupal Security Team

——– FIXED BY
————————————————————

Impersonation in the OpenID module:

* Christian Schmidt [14], OpenID module maintainer
* Christian Mainka [15]
* Christian Koßmann [16]

Open redirect in the Field UI module:

* Yves Chedemois [17], Field UI module maintainer
* Damien McKenna [18] provisional member of the Drupal Security Team
* Pere Orga [19] of the Drupal Security Team
* David Rothstein [20] of the Drupal Security Team
* Klaus Purer [21] of the Drupal Security Team

Open redirect in the Overlay module:

* Jeroen Vreuls [22]
* Ben Dougherty [23] of the Drupal Security Team
* David Rothstein [24] of the Drupal Security Team
* Katherine Senzee [25], Overlay module maintainer

Information disclosure in the render cache system:

* David Rothstein [26] of the Drupal Security Team
* Wim Leers [27]
* willzyx [28]

——– COORDINATED BY
——————————————————

* The Drupal Security Team [29]

——– CONTACT AND MORE INFORMATION
—————————————-

The Drupal security team can be reached at security at drupal.org or via the
contact form at https://www.drupal.org/contact [30].

Learn more about the Drupal Security team and their policies [31], writing
secure code for Drupal [32], and securing your site [33].

Follow the Drupal Security Team on Twitter at
https://twitter.com/drupalsecurity [34]

[1] https://www.drupal.org/project/drupal
[2] https://www.drupal.org/security-team/risk-levels
[3] https://www.drupal.org/node/2507753
[4] https://www.drupal.org/project/render_cache
[5] https://www.drupal.org/drupal-6.36-release-notes
[6] https://www.drupal.org/drupal-7.38-release-notes
[7] https://www.drupal.org/project/drupal
[8] https://www.drupal.org/user/1096424
[9] https://www.drupal.org/user/3101253
[10] https://www.drupal.org/user/1291584
[11] https://www.drupal.org/user/2700643
[12] https://www.drupal.org/u/david_rothstein
[13] https://www.drupal.org/u/catch
[14] https://www.drupal.org/user/216078
[15] https://www.drupal.org/user/1096424
[16] https://www.drupal.org/user/3101253
[17] https://www.drupal.org/user/39567
[18] https://www.drupal.org/user/108450
[19] https://www.drupal.org/user/2301194
[20] https://www.drupal.org/u/david_rothstein
[21] https://www.drupal.org/u/klausi
[22] https://www.drupal.org/user/2700643
[23] https://www.drupal.org/user/1852732
[24] https://www.drupal.org/u/david_rothstein
[25] https://www.drupal.org/u/ksenzee
[26] https://www.drupal.org/u/david_rothstein
[27] https://www.drupal.org/user/99777
[28] https://www.drupal.org/user/1043862
[29] https://www.drupal.org/security-team
[30] https://www.drupal.org/contact
[31] https://www.drupal.org/security-team
[32] https://www.drupal.org/writing-secure-code
[33] https://www.drupal.org/security/secure-configuration
[34] https://twitter.com/drupalsecurity

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