1. EXECUTIVE SUMMARY

CVSS v3 6.3
ATTENTION: Exploitable remotely/low attack complexity
Vendor: Enphase
Equipment: Envoy
Vulnerability: OS Command Injection

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow an attacker to gain root access to the affected product.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following version of Enphase Envoy, an energy monitoring device, is affected:

Envoy: D7.0.88

3.2 VULNERABILITY OVERVIEW

3.2.1 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN AN OS COMMAND (‘OS COMMAND INJECTION’) CWE-78

Enphase Envoy versions D7.0.88 and prior are vulnerable to a command injection exploit that may allow an attacker to execute root commands.

CVE-2023-33869 has been assigned to this vulnerability. A CVSS v3 base score of 6.3 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L).

3.3 BACKGROUND

CRITICAL INFRASTRUCTURE SECTORS: Energy
COUNTRIES/AREAS DEPLOYED: Worldwide
COMPANY HEADQUARTERS LOCATION: United States

3.4 RESEARCHER

OBSWCY3F reported this vulnerability to CISA.

4. MITIGATIONS

Enphase Energy has not responded to requests to work with CISA to mitigate this vulnerability. Users of the affected products are encouraged to contact Enphase Energy support for additional information.

CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:

Minimize network exposure for all control system devices and/or systems, and ensure they are not accessible from the Internet.
Locate control system networks and remote devices behind firewalls and isolate them from business networks.
When remote access is required, use secure methods, such as virtual private networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as its connected devices.

CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.

CISA also provides a section for control systems security recommended practices on the ICS webpage at cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.

Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.

Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.

No known public exploits specifically target this vulnerability.