CyberRota Analysis
AI-GeneratedThe Ingenic T31 SoC is vulnerable due to a flawed boot ROM flash-boot verification process that only compares a single 32-bit word of the RSA signature output with a 32-bit word of the SHA-256 payload digest. This vulnerability allows attackers with physical access to the boot media to forge modified Secondary Program Loader (SPL) images that can bypass secure boot verification, achieving a success rate of approximately 66%. Manufacturers and developers using the Ingenic T31 SoC in their devices should prioritize addressing this issue to prevent unauthorized firmware modifications.
Original NVD Description
The Ingenic T31 SoC boot ROM flash-boot verification path compares only a single 32-bit word of the RSA signature output against a single 32-bit word of the SHA-256 payload digest, rather than compare the full data. This allows an attacker with physical write access to boot media to forge modified SPL (Secondary Program Loader) images that pass secure boot verification without possession of the OEM signing key. Each forgery attempt succeeds with approximately 2/3 probability. This has been validated via reverse engineering, software emulation against vendor-signed images, and end-to-end hardware acceptance of a forged firmware image on a Wyze Video Doorbell v2 (T31X).