ia-13-2-verification-of-identity-assertions-and-access-tokens

name	IA-13(2)_verification-of-identity-assertions-and-access-tokens
description	The source and integrity of identity assertions and access tokens are verified before granting access to system and information resources.
category	authentication
version	5.2.0
author	cyberstrike-official
tags	["nist","sp800-53","rev5","ia-13-2","ia","enhancement"]
tech_stack	["aws","azure","active-directory","linux","windows"]
cwe_ids	["CWE-287"]
chains_with	[]
prerequisites	["IA-13"]
severity_boost	{}

IA-13(2) Verification of Identity Assertions and Access Tokens

Enhancement of: IA-13

High-Level Description

Family: Identification and Authentication (IA) Framework: NIST SP 800-53 Rev 5

This includes verification of digital signatures protecting identity assertions and access tokens, as well as included metadata. Metadata includes information about the access request such as information unique to user, system or information resource being accessed, or the transaction itself such as time. Protected system and information resources could include connected networks, applications, and APIs.

What to Check

• Verify IA-13(2) Verification of Identity Assertions and Access Tokens is documented in SSP
• Confirm control is operating effectively
• Review evidence of continuous monitoring for IA-13(2)
• Verify enhancement builds upon base control IA-13

How to Test

Step 1: Review Documentation

Examine the System Security Plan (SSP) and related artifacts for IA-13(2) 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 authentication settings	cloud_audit_iam_policies
hackbrowser-mcp	Test authentication mechanisms	browser_auth_test

Remediation Guide

Control Statement

The source and integrity of identity assertions and access tokens are verified before granting access to system and information resources.

Implementation Guidance

This includes verification of digital signatures protecting identity assertions and access tokens, as well as included metadata. Metadata includes information about the access request such as information unique to user, system or information resource being accessed, or the transaction itself such as time. Protected system and information resources could include connected networks, applications, and APIs.