3.3 Session times out after inactivity¶
Verify that sessions timeout after a specified period of inactivity.
Levels: 1, 2, 3
Default session controls do not pass this requirement. See Drupal.org: Session Expire project.
All sessions should implement an idle or inactivity timeout. This timeout defines the amount of time a session will remain active in case there is no activity in the session, closing and invalidating the session upon the defined idle period since the last HTTP request received by the web application for a given session ID. The idle timeout limits the chances an attacker has to guess and use a valid session ID from another user. However, if the attacker is able to hijack a given session, the idle timeout does not limit the attacker’s actions, as he can generate activity on the session periodically to keep the session active for longer periods of time. Session timeout management and expiration must be enforced server-side. If the client is used to enforce the session timeout, for example using the session token or other client parameters to track time references (e.g. number of minutes since login time), an attacker could manipulate these to extend the session duration.
Default session controls do not pass this requirement. See StackOverflow: How do I expire a PHP session after 30 minutes?.
Default session controls do not pass this requirement.