Findings Show MFA Bypass in Microsoft Azure Entra ID Using Seamless SSO

Concerned about a potential MFA bypass in Microsoft Azure Entra ID? This article explores the research, explains the vulnerability in context, and offers actionable steps to secure your organization.

Multi-factor authentication (MFA) has become the backbone of cybersecurity for businesses and individuals, adding an extra layer of protection beyond passwords. However, recent Pen Test Partners (PTP) research has identified a potential bypass method for Microsoft Azure Entra ID, a cloud-based identity and access management solution.

How was the issue discovered?

The issue was identified during a Red Team engagement when researchers acquired Domain Admin privileges on the on-premises Active Directory network but could not access the sensitive data on Azure cloud estate as it required authenticating with Azure Entra ID.

According to their blog post, the researchers then discovered a method where Azure Seamless Single Sign-On (SSO) allowed users to access Azure Entra ID-protected resources without passwords. This was achieved ...