Looking at the Attack Surfaces of the Pioneer DMH-WT7600NEX IVI

The report reverse-engineers an embedded device’s dual-partition firmware layout (header, boot, system, dtb, hirtos, bootloader, chips, backup), analyzes the Linux-based system and update format (0x100-byte header, RSA-verified header, RSA-protected AES-256 key, AES-256-CBC encrypted payload leading to a gzipped raw image), and describes methods to extract filesystem contents. It highlights the hirtos firmware (with T-Monitor/triton_TCC897x string), GNSS firmware in chips, and that custom software resides under /usr/local, then shows how modifying backup-partition flags enables serial console and login, identifying CN3603 pin 7 for access.