The Form API in Drupal 6.x before 6.38 ignores access restrictions on submit buttons, which might allow remote attackers to bypass intended access restrictions by leveraging permission to submit a form with a button that has “#access” set to FALSE in the server-side form definition.
www.debian.org/security/2016/dsa-3498
www.openwall.com/lists/oss-security/2016/02/24/19
www.openwall.com/lists/oss-security/2016/03/15/10
github.com/drupal/core
github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2016-3165.yaml
github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2016-3165.yaml
nvd.nist.gov/vuln/detail/CVE-2016-3165
www.drupal.org/SA-CORE-2016-001