Box of Secrets: Discreetly modding an apartment intercom with Matter
3 hours ago
- #iot
- #hardware-hacking
- #security
- Frank's apartment complex intercom system stopped working due to expired cellular service.
- Hazel and the author investigated the system and found an unlocked router with default admin credentials.
- They discovered a vulnerability allowing root password reset via exported configuration files.
- Unable to exploit the router fully, they shifted focus to the physical gate control system.
- They found access to the solenoid control wire, enabling direct gate unlocking by applying power.
- An ESP32 relay board was used to control the solenoid, ensuring system functionality remained intact if their circuit failed.
- Software was developed using Rust and Matter library for integration with Apple Home.
- Memory issues with the ESP32 were resolved by disabling Bluetooth after provisioning.
- Power issues were resolved by using a rectifying regulator to convert AC to DC.
- The final setup was discreet, hidden in a junction box, and fully functional with Apple Home integration.