An issue exists in Espressif ESP-IDF 2.x, 3.0.x up to and including 3.0.9, 3.1.x up to and including 3.1.6, 3.2.x up to and including 3.2.3, and 3.3.x up to and including 3.3.1. An attacker who uses fault injection to physically disrupt the ESP32 CPU can bypass the Secure Boot digest verification at startup, and boot unverified code from flash. The fault injection attack does not disable the Flash Encryption feature, so if the ESP32 is configured with the recommended combination of Secure Boot and Flash Encryption, then the impact is minimized. If the ESP32 is configured without Flash Encryption then successful fault injection allows arbitrary code execution. To protect devices with Flash Encryption and Secure Boot enabled against this attack, a firmware change must be made to permanently enable Flash Encryption in the field if it is not already permanently enabled.
| Vulnerable Product | Search on Vulmon | Subscribe to Product |
|---|---|---|
espressif esp-idf |
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