SV-257258r1069328: RHEL 8.7 and higher must terminate idle user sessions. | Red Hat Enterprise Linux 8 STIG SCAP Benchmark

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Assessment Title

Rule Text

RHEL 8.7 and higher must terminate idle user sessions.

Description

Discussion Text

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.

How this relates to the STIG checklist: STIG vs SCAP benchmark.

IA Controls

NIST SP 800-53

Not mappedCCI-001133

References

DPMS Target Red Hat Enterprise Linux 8 DISA DPMS Target Red Hat Enterprise Linux 8 2921

SCC Automation Reference

The reconstructed evaluation script behind this rule's OVAL check(s) — every module a compound check combines, with this rule's own concrete values and DISA's SCC tool's real per-module mechanism curated from static teardown of SCC releases.

#!/bin/bash
# Reconstructed from oval:mil.disa.stig.rhel8os:def:257258
# RHEL 8.7 and higher must terminate idle user sessions.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# The system terminates idle user sessions.
# textfilecontent54_object (textfilecontent54_test)
test_1() {
  [ "$(sed -En 's/^\s*StopIdleSessionSec\s*=\s*(-?\d*)\s*(?:#.*)?$/\1/p' '/etc/systemd/logind.conf')" -eq 600 ]
}

if test_1; then
  echo "PASS"
else
  echo "FAIL"
fi

Assessment Script Powered by AISandbox-executed

A standalone Shell script to assess this control automatically. Review before running it in your environment.

Syntax-checked and actually executed in an isolated sandbox (not the real system this checks) — confirmed to run without errors.

#!/bin/sh
# oval:mil.disa.stig.rhel8os:def:257258
if [ ! -f "/etc/systemd/logind.conf" ]; then echo "PASS"; exit 0; fi
content=$(grep -E "^\\s*StopIdleSessionSec\\s*=\\s*(-?\\d*)\\s*(?:#.*)?$" /etc/systemd/logind.conf)
if [ -n "$content" ]; then
    idle_time=$(echo "$content" | sed -E 's/.*=\s*//')
    if [ "$idle_time" -ge 600 ]; then echo "PASS"; exit 0; fi
fi
echo "FAIL"; exit 1

Remediation

Configure RHEL 8 to log out idle sessions after 10 minutes by editing the /etc/systemd/logind.conf file with the following line:

StopIdleSessionSec=600

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