Brom Disabled By Efuse 0x146 ~upd~ 🔔 🆒

Technical Report: BROM Disabled by eFuse 0x146

Date: October 26, 2023 Subject: Analysis of Boot ROM (BROM) Disablement via eFuse Configuration 0x146 Status: Informational / Security Advisory

• Hold Volume Down while connecting USB.
• Use fastboot if accessible.
• Use mtk w commands if preloader handshake works.

EMI/Preloader Exploits: Modern tools like Pandora Box or UnlockTool attempt to exploit the Preloader stage directly rather than trying to hit BROM. brom disabled by efuse 0x146

• Use official vendor/third-party tools (sunxi-tools, PhoenixSuit-like tools) and see if the device enumerates in download mode. Failure plus BROM message corroborates fuse-based disable.

• Store device-unique keys (HSK, SBK).
• Disable debug interfaces (JTAG, UART log).
• Implement secure boot and anti-rollback.
• Permanently disable BROM download mode after production.