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Tommi Hovi | The Security blogTommi Hovi | The Security blog
The Security Blog - Tommi Hovi
  • Entra ID, Zero Trust

Granular targeting of FIDO2 passkey method restrictions in Entra ID

I engaged in a conversation on the internet where it was stated that there isn’t a way to restrict FIDO2 authentication methods for specific set of users. Well, there kind of is. And in this short blog post I’m going…

  • Tommi Hovi
  • 20/01/2025
  • Azure

Protecting VMs from rootkits using Trusted Launch

In this blog post we’ll dip our feet into the world of rootkits and bootkits and how we can defend ourselves against them in Azure. Azure Virtual Machine security has improved a lot since Windows Server 2016. Terms like Trusted…

  • Tommi Hovi
  • 02/01/2025
  • Entra ID, Zero Trust

Is permanent admin access elevation to User Access Administrator role a risk?

I once bumped into a customer who said their Global Administrators all have the access elevation toggle switch permanently turned on, so that they all have the User Access Administrator role assigned at the root level all the time for…

  • Tommi Hovi
  • 27/12/2024
  • Other, Zero Trust

Managing your FIDO YubiKey with YubiKey Manager

I needed to check what accounts I have in my YubiKeys and do some housekeeping to delete unnecessary accounts. I figured there has to be some way to do this and found out that Yubico has a nifty command line…

  • Tommi Hovi
  • 23/12/2024
  • Deprecation, Other

No more SMTP with Basic Authentication for you! Can I get you OAuth instead?

Microsoft has set a date for deprecating basic authentication for client submissions (SMTP AUTH) in Exchange Online. That date is September 2025. In this blog post I will guide through what you need to know and what you need to…

  • Tommi Hovi
  • 13/09/2024
  • Azure DevOps, Zero Trust

Restrict personal access token usage in Azure DevOps

There’s two takeaways in this blog post and I’m going to give them away right here in the beginning. According to Azure DevOps documentation all token data like SSH keys and personal access tokens (PATs) are stored in US region.…

  • Tommi Hovi
  • 29/08/2024
  • Azure, Zero Trust

Zero Trust alert: Secure your Azure resource access using constrained delegation

Did you know that you can now delegate Azure RBAC assignments to ease your own burden as administrator? There has always been a possibility to assign Owner or User Access Administrator role, but what if you wanted to delegate the…

  • Tommi Hovi
  • 27/08/2024
  • Book Review, Threats & Attacks

Reading recommendation: The Lazarus Heist by Geoff White

I’m fascinated by real-world events more than fictional stories. So, I chose to read about North Korean cyberattacks by investigative journalist Geoff White. The book proved to be a lot better then I anticipated! And I did anticipate it to…

  • Tommi Hovi
  • 08/07/2024
  • Entra ID, Microsoft Defender for Cloud

Maester 101 – a Microsoft security test automation framework

Cloud security posture management (CSPM) can be a exhausting task. One would need to sleep one eye open to keep up with all the changes in the cloud and would still fall short. If your organization is in multi-cloud environment,…

  • Tommi Hovi
  • 24/06/2024
  • Entra ID

Emergency access setup in Microsoft Entra – 2024 edition

As there are upcoming changes facing organizations starting July 1st 2024 when Microsoft starts the MFA enforcement rollout for user accounts (including guest users) that use Azure management logins, I thought it would be beneficial to go through the principals…

  • Tommi Hovi
  • 06/06/2024
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