Both tests worked, though we could not immediately reproduce the barrage of notifications. We used the proof-of-concept code to imitate a nearby AirTag, and the other code for transferring a phone number. Once we replaced the Flipper Zero’s firmware with our custom compiled code, simply switching on Bluetooth from the Flipper Zero device began broadcasting the pop-up signals to the nearby iPhones.

TechCrunch tested the exploit by compiling the proof-of-concept code from the security researcher’s blog into a firmware software file, which we then loaded into a Flipper Zero device we have.

Using a Flipper Zero, TechCrunch was able to reproduce this attack on an iPhone 8 and a newer iPhone 14 Pro. Example of 'DDOS: /5FGhK7QYoGĪnthony said he tweaked the Flipper Zero firmware to broadcast what are called Bluetooth Advertisements, a type of transmission in the Bluetooth Low Energy protocol that Apple uses to give iDevices owners the ability to connect to an Apple Watch, other Apple devices and send pictures to other iDevice owners using the Bluetooth file sharing system AirDrop.Īs Anthony put it, these are “broadcast signals that devices use to announce their presence and capabilities.”

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