Oasis Security Research Team Discovers Microsoft Azure MFA Bypass
www.oasis.security
Critical vulnerability could have allowed malicious actors to gain unauthorized access to users’ Microsoft accounts.

Archived

Here is the report (pdf) – (archived)

Oasis Security’s research team uncovered a critical vulnerability in Microsoft’s Multi-Factor Authentication (MFA) implementation, allowing attackers to bypass it and gain unauthorized access to the user’s account, including Outlook emails, OneDrive files, Teams chats, Azure Cloud, and more. Microsoft has more than 400 million paid Office 365 seats, making the consequences of this vulnerability far-reaching.

The bypass was simple: it took around an hour to execute, required no user interaction and did not generate any notification or provide the account holder with any indication of trouble.

[Edit to insert the original link to the Oasis site.]

  • N0x0n@lemmy.ml
    0·
    3 days ago

    How so? From my perspective I’m just saying that yes Microsoft probably doesn’t need to implemement such measure, however does that mean that they don’t?

    But that’s always a take people won’t argue on because… It’s Microsoft, why would they do that? But why not?

    That’s people hiding behind the benefit of the doubt giving Microsoft a favorable opinion given in the absence of full evidence.

    Happy holidays.