SV-274016r1120036: Amazon Linux 2023 must require users to provide a password for privilege escalation. | Amazon Linux 2023 STIG SCAP Benchmark

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Assessment Title

Rule Text

Amazon Linux 2023 must require users to provide a password for privilege escalation.

Description

Discussion Text

Without reauthentication, users may access resources or perform tasks for which they do not have authorization.

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

IA Controls

NIST SP 800-53

Not mappedCCI-000366

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:274016
# Amazon Linux 2023 must require users to provide a password for privilege escalation.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# 'NOPASSWD' does not exist in /etc/sudoers
# textfilecontent54_object (textfilecontent54_test)
test_1() {
  ! ( grep -Pq '^(?!#).*\s+NOPASSWD.*$' '/etc/sudoers' &>/dev/null )
}
# 'NOPASSWD' does not exist in /etc/sudoers.d
# textfilecontent54_object (textfilecontent54_test)
test_2() {
  ! ( grep -rqP --include='*' '^(?!#).*\s+NOPASSWD.*$' '/etc/sudoers.d' &>/dev/null )
}

if ( test_1 && test_2 ); 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:274016

if ! grep -qE '^(?!#).*\\s+NOPASSWD.*$' /etc/sudoers /etc/sudoers.d/*; then
  echo "PASS"
  exit 0
else
  echo "FAIL"
  exit 1
fi

Remediation

Configure Amazon Linux 2023 to not allow users to execute privileged actions without authenticating with a password.

Remove any occurrence of "NOPASSWD" found in "/etc/sudoers" file or files in the "/etc/sudoers.d" directory.

$ sudo sed -i '/NOPASSWD/ s/^/# /g' /etc/sudoers /etc/sudoers.d/*