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1. EXECUTIVE SUMMARY
- CVSS v3 7.8
- ATTENTION: Low attack complexity
- Vendor: Fuji Electric
- Equipment: Alpha5
- Vulnerabilities: Access of Uninitialized Pointer, Out-of-bound Read, Stack-based Buffer Overflow, Heap-based Buffer Overflow
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow an attacker to disclose sensitive information and execute arbitrary code.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of Fuji Electric’s Alpha5, a servo drive system, are affected:
- Alpha5: All versions prior to 4.3
3.2 VULNERABILITY OVERVIEW
The affected product is vulnerable due to an invalid pointer initialization, which may lead to information disclosure.
The affected product is vulnerable to an out-of-bounds read, which may result in disclosure of sensitive information.
The affected product is vulnerable to an out-of-bounds read, which may result in code execution.
The affected product is vulnerable to a stack-based buffer overflow, which may allow an attacker to execute arbitrary code.
The affected product is vulnerable to a heap-based buffer overflow, which may lead to code execution.
- CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
- COUNTRIES/AREAS DEPLOYED: Worldwide
- COMPANY HEADQUARTERS LOCATION: Japan
Xina1i, working with Trend Micro’s Zero Day Initiative, reported these vulnerabilities to CISA.
Fuji Electric recommends upgrading to Alpha5 v4.4. The files can be obtained in the Fuji Library.
CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should 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.
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 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 cisa.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.
No known public exploits specifically target these vulnerabilities. These vulnerabilities are 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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