SV-37277r1: NIS/NIS+/yp command files must not have extended ACLs. | Red Hat Enterprise Linux 5 Security Technical Implementation Guide

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Assessment Title

Rule Text

NIS/NIS+/yp command files must not have extended ACLs.

Description

Discussion Text

NIS/NIS+/yp files are part of the system's identification and authentication processes and are critical to system security. ACLs on these files could result in unauthorized modification, which could compromise these processes and the system.

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

IA Controls

NIST SP 800-53

Not mappedCCI-000225

Additional Details

Responsibility

System Administrator

IA Controls

ECLP-1

References

DPMS Target Red Hat 5 DISA DPMS Target Red Hat 5 2154

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.

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.fso.rhel11:def:524
check_acl() {
  for file in /var/yp/*; do
    if [ -e "$file" ]; then
      if [ -n "$(stat -c '%A' "$file" | grep -o 'acl')" ]; then
        echo "FAIL"
        exit 1
      fi
    fi
  done
}
check_acl
echo "PASS"
exit 0

Remediation

Remove the extended ACL from the file.
# setfacl --remove-all /var/yp/*