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kaeru is an ARMv7 payload that provides arbitrary code execution on MediaTek bootloaders (LK) with full permissions, initiated post-hardware initialization and before the main LK function (app) execution. For more details about it, visit and read my blog.

Building

Requirements

• Python 3
• liblk
• gcc-arm-none-eabi

Linux

The payload needs to be built before injecting it:

git clone git@github.com:R0rt1z2/kaeru.git
cd kaeru
make

Debugging can be enabled by with export KAERU_DEBUG=1.

Injecting

After successfully building the payload, it must be injected into your LK image with the provided script:

python3 inject_payload bin/lk.bin build/payload.bin <payload_address> <caller_address>

Both the payload address and the caller address can be found in common.h.

License

This project is licensed under the GPLv3 license - see the LICENSE file for details.