SV-37634r1: If the system is using LDAP for authentication or account information, the system must verify the LDAP server's certificate has not been revoked. | Red Hat Enterprise Linux 5 Security Technical Implementation Guide

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Assessment Title

Rule Text

If the system is using LDAP for authentication or account information, the system must verify the LDAP server's certificate has not been revoked.

Description

Discussion Text

LDAP can be used to provide user authentication and account information, which are vital to system security. Communication between an LDAP server and a host using LDAP requires authentication.

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

IA Controls

NIST SP 800-53

Not mappedCCI-000185

Additional Details

Responsibility

System Administrator

IA Controls

DCNR-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.

#!/bin/bash
# Reconstructed from oval:mil.disa.fso.rhel11:def:423
# If the system is using LDAP for authentication or account information, the system must verify the LDAP server's certificate has not been revoked.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# system is not using ldap
# textfilecontent54_object (textfilecontent54_test)
test_1() {
  ! ( grep -Pq '^[^#].*ldap' '/etc/nsswitch.conf' &>/dev/null )
}
# system is using ldap
# textfilecontent54_object (textfilecontent54_test)
test_2() {
  ! ( grep -Pq '^[^#].*ldap' '/etc/nsswitch.conf' &>/dev/null )
}
# tls_crlcheck is ALL
# textfilecontent54_object (textfilecontent54_test)
test_3() {
  grep -Pq '[^#][Tt][Ll][Ss]_[Cc][Rr][Ll][Cc][Hh][Ee][Cc][Kk][ 	]+[Aa][Ll][Ll]$' '/etc/ldap.conf' &>/dev/null
}

if ! ( test_1 || ! ( test_2 && test_3 ) ); 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.fso.rhel11:def:423

if ! grep -q "^[^#].*ldap" /etc/nsswitch.conf; then
    echo "PASS"
    exit 0
fi

if ! grep -q "^[^#].*ldap" /etc/nsswitch.conf && grep -q "[^#][Tt][Ll][Ss]_[Cc][Rr][Ll][Cc][Hh][Ee][Cc][Kk][ \t]+[Aa][Ll][Ll]$" /etc/ldap.conf; then
    echo "FAIL"
    exit 1
fi

echo "PASS"
exit 0

Remediation

Edit "/etc/ldap.conf" and add or set the "tls_crlcheck" setting to "all".