SV-274059r1261409: Amazon Linux 2023 must enable certificate-based smart card authentication. | Amazon Linux 2023 STIG SCAP Benchmark

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Assessment Title

Rule Text

Amazon Linux 2023 must enable certificate-based smart card authentication.

Description

Discussion Text

Without the use of multifactor authentication, the ease of access to privileged functions is greatly increased. Multifactor authentication requires using two or more factors to achieve authentication. A privileged account is defined as an information system account with authorizations of a privileged user. The DoW common access card (CAC) with DoW-approved PKI is an example of multifactor authentication. Satisfies: SRG-OS-000375-GPOS-00160, SRG-OS-000705-GPOS-00150

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

IA Controls

NIST SP 800-53

Not mappedCCI-004046Not mappedCCI-004047

References

DPMS Target Amazon Linux 2023 DISA DPMS Target Amazon Linux 2023 5700

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.amzlx23os:def:274059
# Amazon Linux 2023 must enable certificate-based smart card authentication.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# sssd.conf: pam_cert_auth = True
# textfilecontent54_object (textfilecontent54_test)
test_1() {
  ( (sed -En 's/^\s*pam_cert_auth\s*=\s*(.*)\s*$/\1/p' '/etc/sssd/sssd.conf') | grep -qxF 'true' ) || ( (grep -rhP --include='*' '^\s*pam_cert_auth\s*=\s*(.*)\s*$' '/etc/sssd/conf.d' | sed -En 's/^\s*pam_cert_auth\s*=\s*(.*)\s*$/\1/p') | grep -qxF 'true' )
}

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.amzlx23os:def:274059

if [ ! -f "/etc/sssd/sssd.conf" ]; then echo "PASS"; exit 0; fi
if grep -qE "^\\s*pam_cert_auth\\s*=\\s*true\\s*$" /etc/sssd/sssd.conf; then echo "PASS"; exit 0; fi

if [ ! -d "/etc/sssd/conf.d" ]; then echo "PASS"; exit 0; fi
for file in /etc/sssd/conf.d/*; do
    if [ -f "$file" ]; then
        if grep -qE "^\\s*pam_cert_auth\\s*=\\s*true\\s*$" "$file"; then echo "PASS"; exit 0; fi
    fi
done
echo "FAIL"; exit 1

Remediation

Configure Amazon Linux 2023 to have smart cards enabled in SSSD.

Edit the file "/etc/sssd/sssd.conf" or a configuration file in "/etc/sssd/conf.d" and add or edit the following line:

pam_cert_auth = True