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Accept only external authenticators that are NIST-compliant;
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macOS post-exploitation for credential harvesting, DTrace monitoring, TCC bypass, and stealth operations via native tools
Windows userland post-exploitation for credential harvesting, monitoring, AMSI/ETW bypass, and stealth operations
Kubernetes post-exploitation for container escape, secret extraction, RBAC abuse, and cluster persistence
Based on SOC occupation classification
| name | IA-8(2)_acceptance-of-external-authenticators |
| description | Accept only external authenticators that are NIST-compliant; |
| category | authentication |
| version | 5.2.0 |
| author | cyberstrike-official |
| tags | ["nist","sp800-53","rev5","ia-8-2","ia","enhancement"] |
| tech_stack | ["aws","azure","active-directory","linux","windows"] |
| cwe_ids | ["CWE-287"] |
| chains_with | [] |
| prerequisites | ["IA-8"] |
| severity_boost | {} |
Enhancement of: IA-8
Family: Identification and Authentication (IA) Framework: NIST SP 800-53 Rev 5
Acceptance of only NIST-compliant external authenticators applies to organizational systems that are accessible to the public (e.g., public-facing websites). External authenticators are issued by nonfederal government entities and are compliant with SP 800-63B . Approved external authenticators meet or exceed the minimum Federal Government-wide technical, security, privacy, and organizational maturity requirements. Meeting or exceeding Federal requirements allows Federal Government relying parties to trust external authenticators in connection with an authentication transaction at a specified authenticator assurance level.
Examine the System Security Plan (SSP) and related artifacts for IA-8(2) implementation details. Verify the organization has documented how this control is satisfied.
# 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
Verify the control is actively functioning, not just documented. Check logs, configurations, and operational evidence.
| Tool | Purpose | Usage |
|---|---|---|
| cloud-audit-mcp | Check authentication settings | cloud_audit_iam_policies |
| hackbrowser-mcp | Test authentication mechanisms | browser_auth_test |
Accept only external authenticators that are NIST-compliant; and Document and maintain a list of accepted external authenticators.
Acceptance of only NIST-compliant external authenticators applies to organizational systems that are accessible to the public (e.g., public-facing websites). External authenticators are issued by nonfederal government entities and are compliant with SP 800-63B . Approved external authenticators meet or exceed the minimum Federal Government-wide technical, security, privacy, and organizational maturity requirements. Meeting or exceeding Federal requirements allows Federal Government relying parties to trust external authenticators in connection with an authentication transaction at a specified authenticator assurance level.
| Finding | Severity | Impact |
|---|---|---|
| IA-8(2) Acceptance of External Authenticators not implemented | High | Identification and Authentication |
| IA-8(2) partially implemented | Medium | Incomplete Identification and Authentication |
| CWE ID | Title |
|---|---|
| CWE-287 | Improper Authentication |