The Announcements module 6.x-1.x before 6.x-1.5 for Drupal allows remote authenticated users with the "access announcements" permission to bypass node access restrictions and possibly have other unspecified impact.
http://www.securityfocus.com/bid/55283
http://www.openwall.com/lists/oss-security/2012/10/07/1
http://www.openwall.com/lists/oss-security/2012/10/04/6