Because the source code for baseband firmware is closed, independent security researchers cannot perform static analysis to identify logic bugs or buffer overflows before devices ship. This creates a scenario where vulnerabilities may exist for years, known only to the vendor or sophisticated attackers.
The next time you see "GSM" in your phone’s status bar, remember: that is not just a signal. It is a remote execution environment, and you don’t know what code is running inside it. gsm+secret+firmware
: Proprietary firmware is tuned for specific hardware. Secret or "leaked" versions may cause the device to overheat or suffer from extreme battery drain. Notable Projects Because the source code for baseband firmware is