CVE-2019-15894

Description

An issue was discovered in Espressif ESP-IDF 2.x, 3.0.x through 3.0.9, 3.1.x through 3.1.6, 3.2.x through 3.2.3, and 3.3.x through 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.

Category

6.8
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.04%
Vendor Advisory espressif.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://www.espressif.com/en/news/Espressif_Security_Advisory_Concerning_Fault_Injection_and_Secure_Boot mitigation vendor advisory

Frequently Asked Questions

What is the severity of CVE-2019-15894?
CVE-2019-15894 has been scored as a medium severity vulnerability.
How to fix CVE-2019-15894?
To fix CVE-2019-15894, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-15894 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2019-15894 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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