Block That Flow – Device Code Flow in Microsoft Entra ID

As you read this, I’m at the Xchange Security Conference in Dallas, and I learned something yesterday that I must share to protect your data. I will need to work with you to block device code flow in Microsoft Entra ID. In simple terms, it’s disabling a code system that’s similar to how you match a code on two devices when signing into Netflix.

Device code flow is typically used to sign into accounts on devices such as smart TVs or IoT devices. You enter the short code displayed on the device into a separate device, such as your smartphone or computer, to complete the authentication process.

It’s super convenient, but it also poses security risks, particularly related to phishing attacks. Attackers can exploit this flow to gain unauthorized access to accounts without needing to steal credentials directly. It’s especially critical to prevent phishing attacks.

Microsoft advises organizations to block device code flow unless absolutely necessary. This should help mitigate the risk of phishing attacks. At the same time, we will need to help you implement conditional access policies to control and restrict the use of device code flow. This includes specifying when and where it can be used.

We can tailor conditional access policies based on factors such as user location, device status, and risk assessments. This allows you to enforce specific security measures that align with your needs and compliance requirements. This approach enhances security by ensuring that only authorized users can access sensitive information.

Some of things we’ll discuss with you are:

  1. Determining which users or groups need specific access controls based on their roles or functions.
  2. Setting conditions based on the factors mentioned above. For example, you might require MFA for users accessing data from untrusted locations.
  3. Choosing the appropriate access controls, such as blocking access, requiring MFA, or enforcing device compliance.
  4. Testing all of your policies in a report-only mode to assess their impact without affecting users.
  5. Continuously monitoring the effectiveness of the policies and make adjustments as necessary based on user feedback and security incidents.

Call us – 973-433-6676 – or email us to discuss how to block the flow and develop access control policies for your specific needs.