Gsm+secret+firmware

An open-source GSM baseband software implementation. It allows users to replace the proprietary firmware on certain older phones (like the Motorola C118) to inspect what is actually happening on the network level.

: Because the baseband runs on a separate Real-Time Operating System (RTOS), it operates independently of the main OS security features. This means a compromise of the baseband can happen without the user or the main OS ever detecting it. Security Implications and Vulnerabilities gsm+secret+firmware

: Some secret firmware allows a GSM module to act as a fake BTS (cell tower) for MITM attacks, without requiring full OpenBTS or YateBTS setups. An open-source GSM baseband software implementation