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Cis Azure Foundations 5.22

DevOps & Security
cis-azure-foundations-5.22

Cis Azure Foundations 5.22 is an Agent Skill for devops & security published in the CyberStrikeus/CyberStrike repository on GitHub: a SKILL.md instruction file an AI agent can load to do this task.

Ensure 'Require Multifactor Authentication to register or join devices with Microsoft Entra' is set to 'Yes'

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Inspect the Agent Skill at https://github.com/CyberStrikeus/CyberStrike/blob/HEAD/.cyberstrike/skill/CIS_benchmarks/Cloud_Providers/Microsoft_Azure/CIS_Microsoft_Azure_Foundations_Benchmark_v5.0.0/cis-azure-foundations-5.22/SKILL.md and all supporting files. Report provenance, permissions, scripts, dependencies, and security risks. Propose an exact installation into .agents/skills/cis-azure-foundations-5-22, but wait for my approval before writing files or running scripts.

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Ensure 'Require Multifactor Authentication to register or join devices with Microsoft Entra' is set to 'Yes'

Description

NOTE: This recommendation is only relevant if your subscription is using Per-User MFA. If your organization is licensed to use Conditional Access, the preferred method of requiring MFA to join devices to Entra ID is to use a Conditional Access policy (see additional information below for link).

Joining or registering devices to Microsoft Entra ID should require multi-factor authentication.

Rationale

Multi-factor authentication is recommended when adding devices to Microsoft Entra ID. When set to Yes, users who are adding devices from the internet must first use the second method of authentication before their device is successfully added to the directory. This ensures that rogue devices are not added to the domain using a compromised user account.

Impact

A slight impact of additional overhead, as Administrators will now have to approve every access to the domain.

Audit Procedure

Using Azure Portal

  1. From Azure Home select the Portal Menu
  2. Select Microsoft Entra ID
  3. Under Manage, select Devices
  4. Under Manage, select Device settings
  5. Under Microsoft Entra join and registration settings, ensure that Require Multifactor Authentication to register or join devices with Microsoft Entra is set to Yes

Expected Result

Require Multifactor Authentication to register or join devices with Microsoft Entra should be set to Yes.

Remediation

Using Azure Portal

  1. From Azure Home select the Portal Menu
  2. Select Microsoft Entra ID
  3. Under Manage, select Devices
  4. Under Manage, select Device settings
  5. Under Microsoft Entra join and registration settings, set Require Multifactor Authentication to register or join devices with Microsoft Entra to Yes
  6. Click Save

Default Value

By default, Require Multifactor Authentication to register or join devices with Microsoft Entra is set to No.

References

  1. https://learn.microsoft.com/en-us/entra/identity/conditional-access/policy-all-users-device-registration
  2. https://learn.microsoft.com/en-us/security/benchmark/azure/mcsb-identity-management#im-6-use-strong-authentication-controls

CIS Controls

Controls VersionControlIG 1IG 2IG 3
v86.3 Require MFA for Externally-Exposed Applicationsxx
v86.4 Require MFA for Remote Network Accessxxx
v716.3 Require Multi-factor Authenticationxx

Profile

Level 1 | Manual