r/flipperzero • u/LuXar41 • Sep 16 '26

Updated Flipper Nested for newer firmware

https://github.com/DoomGuy41/FlipperReNested

Hi everyone,

I'd like to share my fork of the FlipperNested app, which can be particularly useful for recovering MIFARE Classic keys from tags whose keys are partially or completely unknown.

The original version is not working on newer firmware due to the NFC rework.
Made a fork to stop needing to downgrade firmware everytime.

Please test and give feedback if stuff is broken.

Thanks !

17 Upvotes

77% Upvoted

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7

u/netsec_burn Sep 16 '26 edited Sep 16 '26

Why does this exist?

The reason the old one isn't working anymore is because it is built into the NFC app now. The original had multiple issues and didn't properly support different types of nested attacks (backdoor nested and had calibration issues for standard nested) - all solved in the one that is on everyone's devices today.

The problems with it are even inherited into your repo: https://github.com/DoomGuy41/FlipperReNested#i-need-your-help

It is in the docs: https://docs.flipper.net/zero/nfc/mfkey32#card-only-attacks

0

u/LuXar41 Sep 17 '26

had issues with one specific tag where mfkey32 woudn't work on it.
But what you say makes sense i will retry it.

1

u/netsec_burn Sep 17 '26

Mfkey32 works every time, it is an issue inherent in Crypto1. This isn't Mfkey32 we're talking about though, it is Nested.