Hitachi Energy FOX61x, FOXCST, and FOXMAN-UN Products  – All CISA Advisories

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1. EXECUTIVE SUMMARY

• CVSS v3 4.9
• ATTENTION: Low attack complexity
• Vendor: Hitachi Energy
• Equipment: FOX61x, FOXCST, FOXMAN-UN
• Vulnerability: Improper Validation of Certificate with Host Mismatch

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow attackers to intercept or falsify data exchanges between the client and the server.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

Hitachi Energy reports that the following products are affected:

• FOX61x: Versions prior to R16B
• FOXCST: Versions prior to 16.2.1
• FOXMAN-UN: R15A and prior
• FOXMAN-UN: R15B PC4 and prior
• FOXMAN-UN: R16A
• FOXMAN-UN: R16B PC2 and prior

3.2 VULNERABILITY OVERVIEW

3.2.1 IMPROPER VALIDATION OF CERTIFICATE WITH HOST MISMATCH CWE-297

Hitachi Energy is aware of a vulnerability that affects the FOXCST client application, which if exploited would allow attackers to intercept or falsify data exchanges between the client and the server.

CVE-2024-2462 has been assigned to this vulnerability. A CVSS v3 base score of 4.9 has been assigned; the CVSS vector string is (CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H).

3.3 BACKGROUND

• CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
• COUNTRIES/AREAS DEPLOYED: Worldwide
• COMPANY HEADQUARTERS LOCATION: Switzerland

3.4 RESEARCHER

Hitachi Energy PSIRT reported this vulnerability to CISA.

4. MITIGATIONS

Hitachi Energy has identified the following specific workarounds and mitigations users can apply to reduce risk:

• FOXMAN-UN R16B PC2 and earlier: Update to FOXMAN-UN R16B PC3 or later and apply general mitigation factors.
• FOXMAN-UN R15B or prior: Update to FOXMAN-UN R15B PC5 and apply general mitigation factors. (Update planned)
• FOXMAN-UN R16A, FOXMAN-UN R15A, FOXMAN-UN older than R15A: EOL versions – no remediation will be available. Recommended to update to FOXMAN-UN R16B PC4 or R15B PC5 (update planned) and apply general mitigation factors.
• FOX61x less than R16B: Update to FOX61x R16B
• FOXCST less than 16.2.1: Update to FOXCST_16.2.1

CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability, such as:

• Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the Internet.
• Locate control system networks and remote devices behind firewalls and isolating them from business networks.
• When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs). Recognize VPNs may have vulnerabilities, should be updated to the most recent version available, and are only as secure as the 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 on cisa.gov. 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.

CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.

Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov 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.

CISA also recommends users take the following measures to protect themselves from social engineering attacks:

• Do not click web links or open attachments in unsolicited email messages.
• Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams.
• Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks.

No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time. This vulnerability is not exploitable remotely.

5. UPDATE HISTORY

• January 16, 2025: Initial Publication

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