AlmaLinux OS 9 must automatically exit interactive command shell user sessions after 10 minutes of inactivity.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-269108 | SRG-OS-000029-GPOS-00010 | ALMA-09-001890 | SV-269108r1049990_rule | 2025-02-20 | 1 |
| 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. Declaring $TMOUT as read-only means the user cannot override the setting. Satisfies: SRG-OS-000029-GPOS-00010, SRG-OS-000281-GPOS-00111, SRG-OS-000163-GPOS-00072 |
| ℹ️ Check |
|---|
| Verify AlmaLinux OS 9 is configured to exit interactive command shell user sessions after 10 minutes of inactivity or less with the following command: $ grep 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 |
|---|
| Configure AlmaLinux OS 9 to exit interactive command shell user sessions after 10 minutes of inactivity using the following command: echo "declare -xr TMOUT=600" > /etc/profile.d/tmout.sh |