this post was submitted on 20 Dec 2024
97 points (100.0% liked)

Technology

37800 readers
155 users here now

A nice place to discuss rumors, happenings, innovations, and challenges in the technology sphere. We also welcome discussions on the intersections of technology and society. If it’s technological news or discussion of technology, it probably belongs here.

Remember the overriding ethos on Beehaw: Be(e) Nice. Each user you encounter here is a person, and should be treated with kindness (even if they’re wrong, or use a Linux distro you don’t like). Personal attacks will not be tolerated.

Subcommunities on Beehaw:

This community's icon was made by Aaron Schneider, under the CC-BY-NC-SA 4.0 license.

founded 2 years ago
MODERATORS
alyaza@beehaw.org
TheRtRevKaiser@beehaw.org
gyrfalcon@beehaw.org
rs5th@beehaw.org
coldredlight@beehaw.org
Los@beehaw.org
SemioticStandard@beehaw.org
TheRtRevKaiser@kbin.social
remington@beehaw.org
97
Researchers uncover critical vulnerability in Microsoft's Multi-Factor Authentication, allowing attackers to gain access to user accounts such as Outlook emails, OneDrive files, Teams chat, and more (www.oasis.security)
submitted 1 day ago* (last edited 1 day ago) by thelucky8@beehaw.org to c/technology@beehaw.org
13 comments fedilink hide all child comments
 

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.]

you are viewing a single comment's thread
view the rest of the comments
[–] jarfil@beehaw.org 11 points 1 day ago

No, it's a MFA bypass. All a hacker needed was the ability to initiate new sessions (after stealing user:pass, for example via malware).