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Drupal Fivestar 6.x Input Validation

Drupal Fivestar 6.x Input Validation
Posted Apr 12, 2012
Authored by Ezra Barnett Gildesgame | Site drupal.org

The Drupal Fivestar module version 6.x suffers from an input validation vulnerability that allows a malicious user to improperly modify voting averages.

tags | advisory
SHA-256 | 5e603b28ddbe1a91965a76ce7952b5d0185b5857eec6494e0a37c3d54ff9dd84

Drupal Fivestar 6.x Input Validation

Change Mirror Download
View online: http://drupal.org/node/1528614

* Advisory ID: DRUPAL-SA-CONTRIB-2012-058
* Project: Fivestar [1] (third-party module)
* Version: 6.x
* Date: 2012-April-11
* Security risk: Moderately critical [2]
* Exploitable from: Remote
* Vulnerability: Input Validation

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

The Fivestar module enables you to add a voting widget to nodes and comments.

The module does not sufficiently validate all votes passed by the
asynchronous voting widget allowing a malicious user to improperly modify
voting averages.

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

* Fivestar 6.x-1.x versions prior to 6.x-1.20

Drupal core is not affected. If you do not use the contributed Fivestar [3]
module, there is nothing you need to do.

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

Install the latest version:

* If you use the Fivestar module for Drupal 6.x, upgrade to Fivestar
6.x-1.20 [4]

Also see the Fivestar [5] project page.

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

* Ezra Barnett Gildesgame [6]

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

* Eric J. Duran [7], the module maintainer

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

* Ben Jeavons [8] of the Drupal Security Team
* Michael Hess [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 http://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].


[1] http://drupal.org/project/fivestar
[2] http://drupal.org/security-team/risk-levels
[3] http://drupal.org/project/fivestar
[4] http://drupal.org/node/1528600
[5] http://drupal.org/project/fivestar
[6] http://drupal.org/user/69959
[7] http://drupal.org/user/244460
[8] http://drupal.org/user/91990
[9] http://drupal.org/user/102818
[10] http://drupal.org/contact
[11] http://drupal.org/security-team
[12] http://drupal.org/writing-secure-code
[13] http://drupal.org/security/secure-configuration

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