CVE-2019-15894 Security feature bypass in n/a
Physical fault injection bypasses Secure Boot verification, allowing unverified code execution if Flash Encryption is not permanently enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-15894?
CVE-2019-15894 is a medium-severity vulnerability in n/a, published on 7 Oct 2019. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-755
Which versions are affected by CVE-2019-15894?
It affects 1 product.
Products include Espressif Esp-Idf.
How do I fix CVE-2019-15894?
No fix has been published for CVE-2019-15894 yet. Limit exposure of the affected software until one is available.
Is CVE-2019-15894 being exploited?
There is no known exploitation of CVE-2019-15894 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-hgpr-gf26-38f8.