SV-230239r1262191: The krb5-workstation package must not be installed on RHEL 8. | Red Hat Enterprise Linux 8 STIG SCAP Benchmark

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Assessment Title

Rule Text

The krb5-workstation package must not be installed on RHEL 8.

Description

Discussion Text

Unapproved mechanisms used for authentication to the cryptographic module are not verified and therefore, cannot be relied upon to provide confidentiality or integrity, and DoW data may be compromised. RHEL 8 systems utilizing encryption are required to use FIPS-compliant mechanisms for authenticating to cryptographic modules. Currently, Kerberos does not utilize FIPS 140-2 cryptography. FIPS 140-2 is the current standard for validating that mechanisms used to access cryptographic modules utilize authentication that meets DoW requirements. This allows for Security Levels 1, 2, 3, or 4 for use on a general-purpose computing system.

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

IA Controls

NIST SP 800-53

Not mappedCCI-000803

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:230239
# The krb5-workstation package must not be installed on RHEL 8.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# package krb5-workstation is not installed
# rpminfo_object (rpminfo_test)
test_1() {
  ! ( rpm -q --quiet 'krb5-workstation' &>/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.rhel8os:def:230239

if ! command -v rpm &> /dev/null; then
  echo "FAIL"
  exit 1
fi

if rpm -qa | grep -q 'krb5-workstation'; then
  echo "FAIL"
else
  echo "PASS"
fi

exit 0

Remediation

Document the krb5-workstation package with the ISSO as an operational requirement or remove it from the system with the following command:

$ sudo yum remove krb5-workstation