SV-271751r1091965: OL 9 must be configured so that the systemd Ctrl-Alt-Delete burst key sequence is disabled. | Oracle Linux 9 STIG SCAP Benchmark

Loading benchmark…

Assessment Title

Rule Text

OL 9 must be configured so that the systemd Ctrl-Alt-Delete burst key sequence is disabled.

Description

Discussion Text

A locally logged-on user who presses Ctrl-Alt-Delete when at the console can reboot the system. If accidentally pressed, as could happen in the case of a mixed OS environment, this can create the risk of short-term loss of availability of systems due to unintentional reboot. In a graphical user environment, risk of unintentional reboot from the Ctrl-Alt-Delete sequence is reduced because the user will be prompted before any action is taken.

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

IA Controls

NIST SP 800-53

Not mappedCCI-002235

References

DPMS Target Oracle Linux 9 DISA DPMS Target Oracle Linux 9 5680

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.ol9os:def:271751
# OL 9 must be configured so that the systemd Ctrl-Alt-Delete burst key sequence is disabled.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# /etc/systemd/system.conf:CtrlAltDelBurstAction is set to none.
# textfilecontent54_object (textfilecontent54_test)
test_1() {
  (sed -En 's/^\s*CtrlAltDelBurstAction\s*=\s*(\S+)\s*$/\1/p' '/etc/systemd/system.conf') | grep -qxF 'none'
}

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 Definition: oval:mil.disa.stig.ol9os:def:271751

if [ -f "/etc/systemd/system.conf" ]; then
    grep -q "^\\s*CtrlAltDelBurstAction\\s*=\\s*none\\s*$" "/etc/systemd/system.conf" && echo "PASS" && exit 0 || echo "FAIL" && exit 1
else
    echo "PASS" && exit 0
fi

Remediation

Configure the system to disable the CtrlAltDelBurstAction by added or modifying the following line in the "/etc/systemd/system.conf" configuration file:

CtrlAltDelBurstAction=none

Reload the daemon for this change to take effect.

$ sudo systemctl daemon-reload