SV-274149r1120435: Amazon Linux 2023 must disable account identifiers (individuals, groups, roles, and devices) after 35 days of inactivity. | Amazon Linux 2023 STIG SCAP Benchmark

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Assessment Title

Rule Text

Amazon Linux 2023 must disable account identifiers (individuals, groups, roles, and devices) after 35 days of inactivity.

Description

Discussion Text

Inactive identifiers pose a risk to systems and applications because attackers may exploit an inactive identifier and potentially obtain undetected access to the system. Owners of inactive accounts will not notice if unauthorized access to their user account has been obtained. Operating systems need to track periods of inactivity and disable application identifiers after 35 days of inactivity. Satisfies: SRG-OS-000118-GPOS-00060, SRG-OS-000590-GPOS-00110

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

IA Controls

NIST SP 800-53

Not mappedCCI-003627Not mappedCCI-003628

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:274149
# Amazon Linux 2023 must disable account identifiers (individuals, groups, roles, and devices) after 35 days of inactivity.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# /etc/default/useradd: INACTIVE is set to 35 or less, but not -1
# textfilecontent54_object (textfilecontent54_test)
test_1() {
  ( [ "$(sed -En 's/(?i)^\s*INACTIVE\s*=\s*(-?\d+)\s*$/\1/p' '/etc/default/useradd')" -ge 0 ] ) && ( [ "$(sed -En 's/(?i)^\s*INACTIVE\s*=\s*(-?\d+)\s*$/\1/p' '/etc/default/useradd')" -le 35 ] )
}

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:274149
if [ ! -f "/etc/default/useradd" ]; then echo "PASS"; exit 0; fi
if [ "$(grep -E '^\\s*INACTIVE\\s*=\\s*(-?\\d+)\\s*$' /etc/default/useradd | awk -F'=' '{print $2}' | grep -E '^[0-3][0-5]$')" ]; then echo "PASS"; exit 0; else echo "FAIL"; exit 1; fi

Remediation

Configure Amazon Linux 2023 to disable account identifiers after 35 days of inactivity after the password expiration. 

Run the following command to change the configuration for useradd:

$ sudo useradd -D -f 35

The recommendation is 35 days, but a lower value is acceptable.