[IT-SecNots] [Security-news] Flag clear - Moderately Critical - Cross Site Request Forgery (CSRF) - SA-CONTRIB-2017-017

[security-news AT drupal.org]

View online: https://www.drupal.org/node/2852924

  * Advisory ID: DRUPAL-SA-CONTRIB-2017-017
  * Project: Flag clear [1]     (third-party module)
  * Version: 7.x
  * Date: 2017-February-15
  * Security risk: 10/25 ( Moderately Critical)
    AC:Basic/A:Admin/CI:None/II:Some/E:Theoretical/TD:All [2]
  * Vulnerability: Cross Site Request Forgery

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

The Flag clear module allows administrators to remove user flags for content.
This functionality is often useful in user-submission use-cases, where users
do not necessarily need to unflag things on their own.

The module doesn't sufficiently protect from CSRF attacks. The unflagging
links do not include a token.

This vulnerability is mitigated by the fact that an attacker must be
targeting users with the 'clear flags' role. They must also discover a valid
combination of flag, content and user IDs for flagged content.


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

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

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

  * All Flag clear module versions prior to 7.x-2.0.

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

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

Install the latest version:

  * If you use the Flag clear module for Drupal 7.x, upgrade to Flag clear
    7.x-2.0 [5]

Also see the Flag clear [6] project page.

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

  * Neil Drumm [7] of the Drupal Security Team

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

  * Zak Huber [8] the module maintainer

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

  * Peter Wolanin [9] 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 https://www.drupal.org/contact [10].

Learn more about the Drupal Security team and their policies [11], writing
secure code for Drupal [12], and  securing your site [13].

Follow the Drupal Security Team on Twitter at
https://twitter.com/drupalsecurity [14]


[1] https://www.drupal.org/project/flag_clear
[2] https://www.drupal.org/security-team/risk-levels
[3] http://cve.mitre.org/
[4] https://www.drupal.org/project/flag_clear
[5] https://www.drupal.org/node/2614438
[6] https://www.drupal.org/project/flag_clear
[7] https://www.drupal.org/user/3064
[8] https://www.drupal.org/user/1437276/
[9] https://www.drupal.org/user/49851
[10] https://www.drupal.org/contact
[11] https://www.drupal.org/security-team
[12] https://www.drupal.org/writing-secure-code
[13] https://www.drupal.org/security/secure-configuration
[14] https://twitter.com/drupalsecurity

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