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Ensure a multifactor authentication policy exists for all users
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Showing SKILL.md
| name | cis-azure-foundations-5.2.4 |
| description | Ensure a multifactor authentication policy exists for all users |
| category | cis-azure-foundations |
| version | 5.0.0 |
| author | cyberstrike-official |
| tags | ["cis","azure","identity","conditional-access"] |
| cis_id | 5.2.4 |
| cis_benchmark | CIS Microsoft Azure Foundations Benchmark v5.0.0 |
| tech_stack | ["azure"] |
| cwe_ids | [] |
| chains_with | ["cis-azure-foundations-5.2.5","cis-azure-foundations-5.2.6"] |
| prerequisites | [] |
| severity_boost | {} |
A Conditional Access policy can be enabled to ensure that users are required to use Multifactor Authentication (MFA) to login.
Note: Since 2024, Azure has been rolling out mandatory multifactor authentication. For more information:
Multifactor authentication is strongly recommended to increase the confidence that a claimed identity can be proven to be the subject of the identity. This results in a stronger authentication chain and reduced likelihood of exploitation.
There is an increased cost associated with Conditional Access policies because of the requirement of Microsoft Entra ID P1 or P2 licenses. Additional support overhead may also need to be considered.
Microsoft Entra ID.Security.Conditional Access.Policies.Users.Include ensure that All Users is specified.Exclude ensure that no users or groups are specified. If there are users or groups specified for exclusion, a very strong justification should exist for each exception, and all excepted account-level objects should be recorded in documentation along with the justification for comparison in future audits.A Conditional Access policy should exist that requires MFA for all users, targeting all cloud apps, with the Grant control set to Require multifactor authentication.
Microsoft Entra ID.Security.Conditional Access.Policies.+ New policy.Users.Include, select All users.Exclude, check Users and groups.Select.Target resources.All cloud apps.Grant.Grant access, check Require multifactor authentication and click Select.Enable policy to Report-only.Create.After testing the policy in report-only mode, update the Enable policy setting from Report-only to On.
Starting October 2024, MFA will be required for all accounts by default.
| Controls Version | Control | IG 1 | IG 2 | IG 3 |
|---|---|---|---|---|
| v8 | 6.3 Require MFA for Externally-Exposed Applications | x | x | |
| v8 | 6.4 Require MFA for Remote Network Access | x | x | x |
| v7 | 4.5 Use Multifactor Authentication For All Administrative Access | x | x | |
| v7 | 16.3 Require Multi-factor Authentication | x | x |
Level 2 | Manual