Title

RHEL 8 must automatically exit interactive command shell user sessions after 10 minutes of inactivity. (Cat II impact)

Discussion

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. Satisfies: SRG-OS-000163-GPOS-00072, SRG-OS-000029-GPOS-00010

Check Content

Verify RHEL 8 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

Configure RHEL 8 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

Additional Identifiers

Rule ID: SV-279929r1156340_rule

Vulnerability ID: V-279929

Group Title: SRG-OS-000163-GPOS-00072

Expert Comments

CCIs tied to check.

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