Amazon Linux 2023 must automatically exit interactive command shell user sessions after 15 minutes of inactivity.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-274142 | AZLX-23-002396 | SV-274142r1120414_rule | CCI-000057 | medium |
| Description | ||||
| Terminating an idle interactive command shell user session within a short time period reduces the window of opportunity for unauthorized personnel to take control of it when left unattended in a virtual terminal or physical console. | ||||
| STIG | Date | |||
| Amazon Linux 2023 Security Technical Implementation Guide | 2026-02-27 | |||
Details
Check Text (C-274142r1120414_chk)
Verify Amazon Linux 2023 is configured to exit interactive command shell user sessions after 10 minutes of inactivity or less with the following command:
$ sudo grep -i tmout /etc/profile /etc/profile.d/*.sh
/etc/profile.d/tmout.sh:declare -xr TMOUT=600
If "TMOUT" is not set to "600" or less in a script located in the "/etc/'profile.d/ directory, is missing or is commented out, this is a finding.
Fix Text (F-78138r1120413_fix)
Configure Amazon Linux 2023 to exit interactive command shell user sessions after 10 minutes of inactivity.
Add or edit the following line in "/etc/profile.d/tmout.sh":
#!/bin/bash
declare -xr TMOUT=600