CVE-2019-15894

Severity Score

6.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Se detectó un problema en Espressif ESP-IDF versiones 2.x, versiones 3.0.x hasta 3.0.9, versiones 3.1.x hasta 3.1.6, versiones 3.2.x hasta 3.2.3 y versiones 3.3.x hasta 3.3.1. Un atacante que utiliza la inyección de un fallo para interrumpir físicamente la CPU ESP32 puede omitir la comprobación del resumen de Secure Boot en el inicio y arrancar el código no comprobado desde la memoria flash. El ataque de inyección de fallo no deshabilita la función de cifrado de la Flash, por lo que si la ESP32 está configurada con la combinación recomendada de Secure Boot y Flash Encryption, entonces el impacto es minimizado. Si el ESP32 está configurado sin Flash Encryption, entonces la inyección de fallo con éxito permite la ejecución de código arbitrario. Para proteger los dispositivos con Flash Encryption y Secure Boot habilitados contra este ataque, un cambio de firmware se debe realizar para habilitar permanentemente la Flash Encryption en el campo si aún no está habilitado permanentemente.

*Credits: N/A

Attack Vector

Physical

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-09-03 CVE Reserved
2019-10-07 CVE Published
2024-08-05 CVE Updated
2024-09-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-755: Improper Handling of Exceptional Conditions

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://www.espressif.com/en/news/Espressif_Security_Advisory_Concerning_Fault_Injection_and_Secure_Boot	2020-08-24

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Espressif Search vendor "Espressif"		Esp-idf Search vendor "Espressif" for product "Esp-idf"				>= 3.0 < 3.0.9 Search vendor "Espressif" for product "Esp-idf" and version " >= 3.0 < 3.0.9"		-		Affected
Espressif Search vendor "Espressif"		Esp-idf Search vendor "Espressif" for product "Esp-idf"				> 3.1 < 3.1.6 Search vendor "Espressif" for product "Esp-idf" and version " > 3.1 < 3.1.6"		-		Affected
Espressif Search vendor "Espressif"		Esp-idf Search vendor "Espressif" for product "Esp-idf"				> 3.2 < 3.2.3 Search vendor "Espressif" for product "Esp-idf" and version " > 3.2 < 3.2.3"		-		Affected
Espressif Search vendor "Espressif"		Esp-idf Search vendor "Espressif" for product "Esp-idf"				>= 3.3 < 3.3.1 Search vendor "Espressif" for product "Esp-idf" and version " >= 3.3 < 3.3.1"		-		Affected