Power-On of Untrusted Execution Core Before Enabling Fabric Access Control

Opis

The product enables components that contain untrusted firmware before memory and fabric access controls have been enabled.

After initial reset, System-on-Chip (SoC) fabric access controls and other security features need to be programmed by trusted firmware as part of the boot sequence. If untrusted IPs or peripheral microcontrollers are enabled first, then the untrusted component can master transactions on the hardware bus and target memory or other assets to compromise the SoC boot firmware.

Skutki

• Access Control

  Bypass Protection Mechanism

  An untrusted component can master transactions on the HW bus and target memory or other assets to compromise the SoC boot firmware.

Zapobieganie

• Architecture and Design

  The boot sequence should enable fabric access controls and memory protections before enabling third-party hardware IPs and peripheral microcontrollers that use untrusted firmware.

Słabość nadrzędna

• CWE-696 Incorrect Behavior Order

Kiedy powstaje

• Architecture and Design

Dotyczy

Not Language-Specific, System on Chip

Źródła

1. Intel x86 Root of Trust: loss of trust — Mark Ermolov, Positive Technologies, 2020
2. Owned by an iPod — Maximillian Dornseif, 2004