SV-257947r958480: RHEL 9 must disable network management of the chrony daemon. | Red Hat Enterprise Linux 9 STIG SCAP Benchmark

Loading benchmark…

Assessment Title

Rule Text

RHEL 9 must disable network management of the chrony daemon.

Description

Discussion Text

Not exposing the management interface of the chrony daemon on the network diminishes the attack space. Satisfies: SRG-OS-000096-GPOS-00050, SRG-OS-000095-GPOS-00049

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

IA Controls

NIST SP 800-53

Not mappedCCI-000381Not mappedCCI-000382

References

DPMS Target Red Hat Enterprise Linux 9 DISA DPMS Target Red Hat Enterprise Linux 9 5551

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.rhel9os:def:257947
# RHEL 9 must disable network management of the chrony daemon.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# /etc/chrony.conf: cmdport option is set to 0
# textfilecontent54_object (textfilecontent54_test)
test_1() {
  grep -Pq '^[ \t]*cmdport[ \t]+0[ \t]*$' '/etc/chrony.conf' &>/dev/null
}

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.rhel9os:def:257947
if [ ! -f "/etc/chrony.conf" ]; then echo "PASS"; exit 0; fi; if grep -q "^[ \t]*cmdport[ \t]+0[ \t]*$" /etc/chrony.conf; then echo "PASS"; exit 0; else echo "FAIL"; exit 1; fi

Remediation

Configure RHEL 9 to disable network management of the chrony daemon by adding/modifying the following line in the /etc/chrony.conf file:

cmdport 0