PT-2021-11178 · Enphase · Enphase Envoy

Published 2021-06-16 · Updated 2021-06-28 · CVE-2020-25754

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions: Enphase Envoy versions R3.x and D4.x

Description: A custom PAM module for user authentication in Enphase Envoy devices bypasses traditional authentication methods. This module generates a password from the MD5 hash of the username and serial number. The serial number can be obtained by an unauthenticated user through the "/info.xml" API endpoint. Additionally, attempts to change the user password using tools like passwd have no effect.

Recommendations: For Enphase Envoy versions R3.x and D4.x, as a temporary workaround, consider restricting access to the "/info.xml" API endpoint to prevent unauthenticated users from retrieving the serial number. Avoid using the custom PAM module for user authentication until a proper fix is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Weakness Enumeration

CWE-916

Related Identifiers

CVE-2020-25754

Affected Products

Enphase Envoy

References · 5

• 🔥 https://medium.com/stage-2-security/can-solar-controllers-be-used-to-generate-fake-clean-energy-credits-4a7322e7661a · Exploit
• https://enphase.com/en-us/products-and-services/envoy-and-combiner · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-25754 · Security Note
• https://osv.dev/vulnerability/CVE-2020-25754 · Vendor Advisory
• https://stage2sec.com · Note