ac-2-5-inactivity-logout

name	AC-2(5)_inactivity-logout
description	Require that users log out when [organization-defined].
category	authorization
version	5.2.0
author	cyberstrike-official
tags	["nist","sp800-53","rev5","ac-2-5","ac","enhancement"]
tech_stack	["aws","azure","gcp","linux","windows"]
cwe_ids	["CWE-284"]
chains_with	["AC-11"]
prerequisites	["AC-2"]
severity_boost	{"AC-11":"Chain with AC-11 for comprehensive security coverage"}

AC-2(5) Inactivity Logout

Enhancement of: AC-2

High-Level Description

Family: Access Control (AC) Framework: NIST SP 800-53 Rev 5

Inactivity logout is behavior- or policy-based and requires users to take physical action to log out when they are expecting inactivity longer than the defined period. Automatic enforcement of inactivity logout is addressed by AC-11.

What to Check

• Verify AC-2(5) Inactivity Logout is documented in SSP
• Confirm control is operating effectively
• Review evidence of continuous monitoring for AC-2(5)
• Verify enhancement builds upon base control AC-2

How to Test

Step 1: Review Documentation

Examine the System Security Plan (SSP) and related artifacts for AC-2(5) implementation details. Verify the organization has documented how this control is satisfied.

Step 2: Validate Implementation

# For cloud environments, use cloud-audit-mcp tools
# For on-premises, review system configurations directly

# Example: Check if account management policies exist
grep -r "account.management\|access.control" /etc/security/ 2>/dev/null

Step 3: Test Operating Effectiveness

Verify the control is actively functioning, not just documented. Check logs, configurations, and operational evidence.

Tools

Tool	Purpose	Usage
cloud-audit-mcp	Check IAM policies and access controls	cloud_audit_iam_policies
hackbrowser-mcp	Test web application access controls	browser_auth_test

Remediation Guide

Control Statement

Require that users log out when [organization-defined].

Implementation Guidance

Inactivity logout is behavior- or policy-based and requires users to take physical action to log out when they are expecting inactivity longer than the defined period. Automatic enforcement of inactivity logout is addressed by AC-11.

Risk Assessment