IA-4(5)_dynamic-management

DevOps & Security

Manage individual identifiers dynamically in accordance with [organization-defined].

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Source SKILL.md: https://github.com/CyberStrikeus/CyberStrike/blob/HEAD/.cyberstrike/skill/NIST/SP800-53_rev5/IA_identification-and-authentication/IA-4(5)_dynamic-management/SKILL.md

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IA-4(5) Dynamic Management

Enhancement of: IA-4

High-Level Description

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

In contrast to conventional approaches to identification that presume static accounts for preregistered users, many distributed systems establish identifiers at runtime for entities that were previously unknown. When identifiers are established at runtime for previously unknown entities, organizations can anticipate and provision for the dynamic establishment of identifiers. Pre-established trust relationships and mechanisms with appropriate authorities to validate credentials and related identifiers are essential.

What to Check

Verify IA-4(5) Dynamic Management is documented in SSP
Confirm control is operating effectively
Review evidence of continuous monitoring for IA-4(5)
Verify enhancement builds upon base control IA-4

How to Test

Step 1: Review Documentation

Examine the System Security Plan (SSP) and related artifacts for IA-4(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 authentication settings	`cloud_audit_iam_policies`
hackbrowser-mcp	Test authentication mechanisms	`browser_auth_test`

Remediation Guide

Control Statement

Manage individual identifiers dynamically in accordance with [organization-defined].

Implementation Guidance

Risk Assessment

Finding	Severity	Impact
IA-4(5) Dynamic Management not implemented	High	Identification and Authentication
IA-4(5) partially implemented	Medium	Incomplete Identification and Authentication

CWE Categories

CWE ID	Title
CWE-287	Improper Authentication

References

Checklist

Control documented in SSP
Implementation evidence collected
Operating effectiveness validated
Continuous monitoring in place
Related controls (AC-16) reviewed