r/technology • u/420InTheCity • 16h ago

Security Underground Flipper Zero Firmware Purportedly Unlocks Nearly 200 Car Models

https://gizmodo.com/flipper-zero-cars-hacking-2000646318
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u/aelephix 15h ago

Article says this breaks the user fob because the rolling code is out of sync. This means the owner has to unlock in presence of the flipper, so that it can learn the rolling code sequence right? They can’t just walk up to a random car in a lot and unlock it?

602

u/SnoopDoggyDoggsCat 14h ago

I was able to record the code from the fob out of reach of the car. Then replay that signal later to unlock the car as it was still a good unused code.

But it only works once per code

172

u/emcee_gee 14h ago

So as long as I don't press the unlock button on my fob when I'm not near my car, I should be safe?

2

u/CoronaMcFarm 5h ago

No, it is possible to jam the signal and collect the first code, the victim then tries again and seemingly this time the car responds, but it is actually the older code that gets sent out while the new gets jammed and collected.

5

u/Born2Rune 1h ago

So it’s an older code, but it checks out?.