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Credit:
The information has been provided by Sascha Grossenbacher, Khaled Alhourani, and Ben Ford..
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Vulnerable Systems:
* Drupal 7.x only.
Listings showing nodes but not JOINing the node table show all nodes regardless of restrictions imposed by the node_access system. In core, this affects the taxonomy and the forum subsystem.
This issue only affects sites using a node access module such as content access or forum access. If you do not use any node access system then your site is not affected by this vulnerability. It is still considered a best practice to run the latest release and all site owners are encouraged to upgrade when they can regardless of whether or not they are affected.
Note that fixing this issue in contributed modules requires a backwards-compatible API change for modules listing nodes. See http://drupal.org/node/1204572 for more details.
This issue affects Drupal 7.x only.
Vendor Status:
Drupal issued an update for this vulnerability
Patch Availability:
http://drupal.org/node/1204582
CVE Information:
CVE-2011-2687
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