STIGQter: STIG Summary: Canonical Ubuntu 22.04 LTS Security Technical Implementation Guide Version: 2 Release: 9 Benchmark Date: 01 Jul 2026:

Ubuntu 22.04 LTS must automatically exit interactive command shell user sessions after 15 minutes of inactivity.

DISA Rule

SV-260554r958636_rule

Vulnerability Number

V-260554

Group Title

SRG-OS-000279-GPOS-00109

Rule Version

UBTU-22-412030

Severity

CAT II

CCI(s)

• CCI-002361 - Automatically terminate a user session after organization-defined conditions or trigger events requiring session disconnect.

Weight

10

Fix Recommendation

Configure Ubuntu 22.04 LTS to exit interactive command shell user sessions after 15 minutes of inactivity.

Create and/or append a custom file under "/etc/profile.d/" by using the following command:

$ sudo su -c "echo TMOUT=900 >> /etc/profile.d/99-terminal_tmout.sh"

This will set a timeout value of 15 minutes for all future sessions.

To set the timeout for the current sessions, execute the following command over the terminal session:

$ export TMOUT=900

Check Contents

Verify Ubuntu 22.04 LTS is configured to automatically exit interactive command shell user sessions after 15 minutes of inactivity or less by using the following command:

$ sudo grep -E "\bTMOUT=[0-9]+" /etc/bash.bashrc /etc/profile.d/*
/etc/profile.d/99-terminal_tmout.sh:TMOUT=900

If "TMOUT" is not set to "900" or less, is set to "0", is commented out, or missing, this is a finding.

Vulnerability Number

V-260554

Documentable

False

Rule Version

UBTU-22-412030

Severity Override Guidance

Verify Ubuntu 22.04 LTS is configured to automatically exit interactive command shell user sessions after 15 minutes of inactivity or less by using the following command:

$ sudo grep -E "\bTMOUT=[0-9]+" /etc/bash.bashrc /etc/profile.d/*
/etc/profile.d/99-terminal_tmout.sh:TMOUT=900

If "TMOUT" is not set to "900" or less, is set to "0", is commented out, or missing, this is a finding.

Check Content Reference

M

Target Key

5594