SV-281297r1166843: RHEL 10 must not default to the graphical display manager unless approved. | Red Hat Enterprise Linux 10 STIG SCAP Benchmark

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Assessment Title

Rule Text

RHEL 10 must not default to the graphical display manager unless approved.

Description

Discussion Text

Unnecessary service packages must not be installed to decrease the attack surface of the system. Graphical display managers have a long history of security vulnerabilities and must not be used unless approved and documented.

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

IA Controls

NIST SP 800-53

Not mappedCCI-000381

References

DPMS Target Red Hat Enterprise Linux 10 DISA DPMS Target Red Hat Enterprise Linux 10 5733

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.rhel10os:def:281297
# RHEL 10 must not default to the graphical display manager unless approved.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# default.target is symlinked to multi-user.target
# symlink_object (symlink_test)
test_1() {
  (readlink -f '/etc/systemd/system/default.target') | grep -Pq '[\S]*\/multi\-user\.target$'
}

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.rhel10os:def:281297
if [ -e /etc/systemd/system/default.target ] && [ "$(readlink -f /etc/systemd/system/default.target)" = "$(command -v realpath) /lib/systemd/system/multi-user.target" ]; then
  echo "PASS"
  exit 0
else
  echo "FAIL"
  exit 1
fi

Remediation

Configure RHEL 10 to boot to the command line by setting the default target to "multi-user" with the following command:

$ sudo systemctl set-default multi-user.target