| name | IA-2(8)_access-to-accounts-replay-resistant |
| description | Implement replay-resistant authentication mechanisms for access to [organization-defined]. |
| category | authentication |
| version | 5.2.0 |
| author | cyberstrike-official |
| tags | ["nist","sp800-53","rev5","ia-2-8","ia","enhancement"] |
| tech_stack | ["aws","azure","active-directory","linux","windows"] |
| cwe_ids | ["CWE-287"] |
| chains_with | [] |
| prerequisites | ["IA-2"] |
| severity_boost | {} |
IA-2(8) Access to Accounts — Replay Resistant
Enhancement of: IA-2
High-Level Description
Family: Identification and Authentication (IA)
Framework: NIST SP 800-53 Rev 5
Authentication processes resist replay attacks if it is impractical to achieve successful authentications by replaying previous authentication messages. Replay-resistant techniques include protocols that use nonces or challenges such as time synchronous or cryptographic authenticators.
What to Check
How to Test
Step 1: Review Documentation
Examine the System Security Plan (SSP) and related artifacts for IA-2(8) 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
Implement replay-resistant authentication mechanisms for access to [organization-defined].
Implementation Guidance
Authentication processes resist replay attacks if it is impractical to achieve successful authentications by replaying previous authentication messages. Replay-resistant techniques include protocols that use nonces or challenges such as time synchronous or cryptographic authenticators.
