CVE-2020-25754

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An issue was discovered on Enphase Envoy R3.x and D4.x devices. There is a custom PAM module for user authentication that circumvents traditional user authentication. This module uses a password derived from the MD5 hash of the username and serial number. The serial number can be retrieved by an unauthenticated user at /info.xml. Attempts to change the user password via passwd or other tools have no effect.

Se detectó un problema en los dispositivos Enphase Envoy versiones R3.x y D4.x. Se presenta un módulo PAM personalizado para la autenticación de usuarios que omite la autenticación de usuarios tradicional. Este módulo usa una contraseña derivada del hash MD5 del nombre de usuario y el número de serie. El número de serie puede ser recuperado por un usuario no autenticado en el archivo /info.xml. Los intentos de cambiar la contraseña del usuario por medio de passwd u otras herramientas no tienen efecto

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-09-18 CVE Reserved
2021-06-16 CVE Published
2024-08-04 CVE Updated
2024-08-04 First Exploit
2024-10-19 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-916: Use of Password Hash With Insufficient Computational Effort

CAPEC

References (3)

URL	Tag	Source
https://stage2sec.com	Third Party Advisory

URL	Date	SRC
https://medium.com/stage-2-security/can-solar-controllers-be-used-to-generate-fake-clean-energy-credits-4a7322e7661a	2024-08-04

URL	Date	SRC

URL	Date	SRC
https://enphase.com/en-us/products-and-services/envoy-and-combiner	2021-06-28

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Enphase Search vendor "Enphase"	Envoy Firmware Search vendor "Enphase" for product "Envoy Firmware"	d4.0 Search vendor "Enphase" for product "Envoy Firmware" and version "d4.0"	-	Affected	in	Enphase Search vendor "Enphase"	Envoy Search vendor "Enphase" for product "Envoy"	-	-	Safe
Enphase Search vendor "Enphase"	Envoy Firmware Search vendor "Enphase" for product "Envoy Firmware"	r3.0 Search vendor "Enphase" for product "Envoy Firmware" and version "r3.0"	-	Affected	in	Enphase Search vendor "Enphase"	Envoy Search vendor "Enphase" for product "Envoy"	-	-	Safe