EIDSCA.AF06: Authentication Method - FIDO2 security key - Restrict specific keys.
| ID | EIDSCA.AF06 |
| Severity | Medium |
| Suite | EIDSCA |
| Product | Entra ID |
| Feature | Authentication methods |
| Security area | Authentication |
| Resource type | Tenant |
| User impact of fixing | Low |
| Effort to fix | Low |
| Framework controls | nist-800-53-r5:IA-5 Authenticator Management |
| MITRE ATT&CK | T1098.005 |
| Reads from | Microsoft Graph |
What this checks and how to fix it
Section titled “What this checks and how to fix it”Defines if list of AADGUID will be used to allow or block registration.
You should use Block or Allow as value to allow- or blocklisting of AAGuids.
Test script
Section titled “Test script”https://graph.microsoft.com/beta/policies/authenticationMethodsPolicy/authenticationMethodConfigurations('Fido2').keyRestrictions.aaGuids -notcontains $null -and ($result.keyRestrictions.enforcementType -eq 'allow' -or $result.keyRestrictions.enforcementType -eq 'block') -eq 'true'Remediation action
Section titled “Remediation action”Microsoft Learn - Enable passkeys (FIDO2) for your organization: Restrict specific keys
Related links
Section titled “Related links”- Open in Graph Explorer
- fido2AuthenticationMethodConfiguration resource type - Microsoft Graph v1.0 | Microsoft Learn
Mito check, based on EIDSCA. Author: Cloud-Architekt. Open-source licences.
Open-source licences. CIS Benchmark material © Center for Internet Security, Inc.; CISA SCuBA baselines are public domain (CC0).
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