RHEL 9 must terminate idle user sessions.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-258077 | RHEL-09-412080 | SV-258077r1014874_rule | CCI-001133 | medium |
| Description | ||||
| 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. | ||||
| STIG | Date | |||
| Red Hat Enterprise Linux 9 Security Technical Implementation Guide | 2025-05-14 | |||
Details
Check Text (C-258077r1014874_chk)
Verify that RHEL 9 logs out sessions that are idle for 15 minutes with the following command:
$ sudo grep -i ^StopIdleSessionSec /etc/systemd/logind.conf
StopIdleSessionSec=900
If "StopIdleSessionSec" is not configured to "900" seconds, this is a finding.
Fix Text (F-61742r1014873_fix)
Configure RHEL 9 to log out idle sessions by editing the /etc/systemd/logind.conf file with the following line:
StopIdleSessionSec=900
The "logind" service must be restarted for the changes to take effect. To restart the "logind" service, run the following command:
$ sudo systemctl restart systemd-logind