cis-azure-foundations-5-28

name	cis-azure-foundations-5.28
description	Ensure passwordless authentication methods are considered
category	cis-azure-foundations
version	5.0.0
author	cyberstrike-official
tags	["cis","azure","identity","passwordless","fido2","authentication","mfa"]
cis_id	5.28
cis_benchmark	CIS Microsoft Azure Foundations Benchmark v5.0.0
tech_stack	["azure"]
cwe_ids	[]
chains_with	["cis-azure-foundations-5.22","cis-azure-foundations-5.5"]
prerequisites	[]
severity_boost	{}

Ensure passwordless authentication methods are considered

Description

Passwordless authentication methods improve security and user experience by replacing passwords with something you have (e.g., a hardware key), something you are (biometrics), or something you know, offering a convenient and secure way to access resources.

Microsoft Entra ID and Azure Government integrate the following passwordless authentication options:

• Windows Hello for Business
• Platform Credential for macOS
• Platform single sign-on (PSSO) for macOS with smart card authentication
• Microsoft Authenticator
• Passkeys (FIDO2)
• Certificate-based authentication

Rationale

Using passwordless authentication makes sign-in easier and more secure by removing passwords, helping to protect organizations from attacks and improving the user experience.

Impact

Implementing passwordless authentication requires administrative effort and may incur costs for some methods. It has the potential to save time and money by improving user convenience and productivity and by reducing the need for password support.

Audit Procedure

Using Azure Portal

1. Go to Microsoft Entra ID.
2. Click Authentication methods.
3. Under Manage, click Policies.
4. If appropriate for your organization, ensure a passwordless authentication method policy is configured.

Expected Result

At least one passwordless authentication method policy should be configured and enabled for the organization.

Remediation

1. Review the passwordless authentication method options: https://learn.microsoft.com/en-us/entra/identity/authentication/concept-authentication-passwordless.
2. Choose a passwordless authentication method: https://learn.microsoft.com/en-us/entra/identity/authentication/concept-authentication-passwordless#choose-a-passwordless-method.
3. Implement the chosen passwordless authentication method:
   • Microsoft Authenticator: https://learn.microsoft.com/en-us/entra/identity/authentication/how-to-enable-authenticator-passkey.
   • Passkeys (FIDO2): https://learn.microsoft.com/en-us/entra/identity/authentication/how-to-enable-passkey-fido2.