SV-257829r1044896: RHEL 9 must not have the ypserv package installed. | Red Hat Enterprise Linux 9 STIG SCAP Benchmark

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Assessment Title

Rule Text

RHEL 9 must not have the ypserv package installed.

Description

Discussion Text

The NIS service provides an unencrypted authentication service, which does not provide for the confidentiality and integrity of user passwords or the remote session. Removing the "ypserv" package decreases the risk of the accidental (or intentional) activation of NIS or NIS+ services.

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 9 DISA DPMS Target Red Hat Enterprise Linux 9 5551

Checks

DISA STIG (Manual Reference)

Verify that the ypserv package is not installed with the following command:

$ dnf list --installed ypserv

Error: No matching Packages to list

If the "ypserv" package is installed, this is a finding.

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:257829
# RHEL 9 must not have the ypserv package installed.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# rpminfo_object (rpminfo_test)
test_1() {
  ! ( rpm -q --quiet 'ypserv' &>/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 Definition: oval:mil.disa.stig.rhel9os:def:257829
if ! command -v rpm &> /dev/null; then echo "PASS"; exit 0; fi
if rpm -q --queryformat "%{NAME}\n" ypserv > /dev/null; then echo "FAIL"; exit 1; fi
echo "PASS"
exit 0

Remediation

Remove the ypserv package with the following command:

$ sudo dnf remove ypserv