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1. EXECUTIVE SUMMARY
- CVSS v3 4.4
- ATTENTION: Low skill level to exploit
- Vendor: Fuji Electric
- Equipment: FRENIC Loader
- Vulnerability: Out-of-Bounds Read
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow information disclosure.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of FRENIC Loader, an AC drive, are affected:
- FRENIC Loader 126.96.36.199 and prior
3.2 VULNERABILITY OVERVIEW
The affected product is vulnerable to an out-of-bounds read vulnerability, which may allow an attacker to read limited information from the device.
- CRITICAL INFRASTRUCTURE SECTORS: Commercial Facilities
- COUNTRIES/AREAS DEPLOYED: Worldwide
- COMPANY HEADQUARTERS LOCATION: Japan
kimiya of 9SG Security Team, working with Trend Micro’s Zero Day Initiative, reported this vulnerability to CISA.
Fuji Electric has released a new version of FRENIC Loader that addresses the reported vulnerability.
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 that they are not accessible from the Internet.
- Locate control system networks and remote devices behind firewalls, and isolate them from the business network.
- When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing that VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize that VPN is 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 us-cert.gov. Several recommended 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 on us-cert.gov in the Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing any suspected malicious activity should follow their established internal procedures and report their 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 unsolicited attachments in 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 exploits specifically target this vulnerability. This vulnerability is not exploitable remotely.
For any questions related to this report, please contact the CISA at:
Toll Free: 1-888-282-0870
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