Title

Cisco ACI SSH sessions must be terminated after five minutes of inactivity. (Cat I impact)

Discussion

Terminating an idle session within a short time period reduces the window of opportunity for unauthorized personnel to take control of a management session enabled on the console or console port that has been left unattended. Quickly terminating an idle session will also free up resources committed by the managed network element. Terminating network connections associated with communications sessions includes, for example, deallocating associated TCP/IP address/port pairs at the operating system level or deallocating networking assignments at the application level if multiple application sessions are using a single, operating system-level network connection. This does not mean that the device terminates all sessions or network access; it only ends the inactive session and releases the resources associated with that session.

Check Content

Verify the maximum GUI idle duration before requiring login refresh is set to 300 seconds or less: show runing-config crypto webtoken Note: If the output is empty, then the default values are used, this is a finding. If ui-idle-timeout-seconds and webtoken-timeout-seconds are not set to 300 seconds or less, this is a finding.

Fix Text

Set the GUI idle timeout which affects SSH on both APIC and Switches: 1. Navigate to Admin >> AAA >> Security >> Management Settings. 2. In the Properties section, ensure "Web Token Timeout (s)" is set to 300 or less.

Additional Identifiers

Rule ID: SV-271969r1114305_rule

Vulnerability ID: V-271969

Group Title: SRG-APP-000190-NDM-000267

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.