One Token to Rule Them All: The Alarming Flaw That Almost Gave Hackers the Entra ID Crown
Dirk-jan Mollema discovered a flaw granting near-global access to Entra ID tenants. This vulnerability allowed tokens to bypass standard validation, posing a serious security risk. While Microsoft swiftly addressed the issue, it was a stark reminder that when it comes to cybersecurity, there’s always a chance your data could be one token away from chaos.
Hot Take:
When your Entra ID token becomes the Lord of the Tokens, you know it’s time to sound the alarm! Imagine being handed the skeleton key to almost every Entra ID tenant. Microsoft must have felt like they were living in a cybersecurity version of “The Lord of the Rings,” racing against time to destroy this one token that could rule them all. Kudos to Dirk-jan Mollema for being the Frodo of cybersecurity and tossing this vulnerability into the digital Mount Doom before it could wreak havoc!
Key Points:
– A flaw in Microsoft’s Entra ID could have allowed access to every tenant worldwide.
– The vulnerability involved “Actor tokens” which were not properly validated.
– Tokens allowed cross-tenant access and left no log traces.
– Microsoft quickly fixed the flaw after it was reported in July.
– No evidence of exploitation was found according to Microsoft’s telemetry.