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Category:   Application (Forum/Board/Portal)  >   WordPress Vendors:   wordpress.org
WordPress Bugs Let Remote Users Conduct Cross-Site Request Forgery Attacks and Remote Authenticated Users Deny Service
SecurityTracker Alert ID:  1036683
SecurityTracker URL:  http://securitytracker.com/id/1036683
CVE Reference:   CVE-2016-6896, CVE-2016-6897   (Links to External Site)
Date:  Aug 22 2016
Impact:   Denial of service via network, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 4.5.3; possibly other versions
Description:   Two vulnerabilities were reported in WordPress. A remote user can conduct cross-site request forgery attacks. A remote authenticated user can cause the target application to fail.

A remote authenticated user can trigger a path traversal flaw in the wp_ajax_update_plugin() function in 'ajax-actions.php' to read data from '/dev/random/ and deplete the entropy pool, preventing PHP scripts from running [CVE-2016-6896].

A remote user can create a specially crafted HTML page or URL that, when loaded by the target authenticated user, will take actions on the target interface acting as the target user, including conducting the above described path traversal attack [CVE-2016-6897].

The original advisory is available at:

https://sumofpwn.nl/advisory/2016/path_traversal_vulnerability_in_wordpress_core_ajax_handlers.html

Yorick Koster reported this vulnerability.

Impact:   A remote user can take actions on the target system acting as the target authenticated user.

A remote authenticated user can cause the target application to fail.

Solution:   The vendor has issued a fix (4.6).
Vendor URL:  codex.wordpress.org/Version_4.6 (Links to External Site)
Cause:   Access control error, Input validation error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   None.


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