1. EXECUTIVE SUMMARY

CVSS v3 8.8
ATTENTION: Low attack complexity 
Vendor: Mitsubishi Electric 
Equipment: Factory Automation (FA) Products 
Vulnerabilities: Dependency on Vulnerable Third-Party Component 

2. RISK EVALUATION

Successful exploitation of these vulnerabilities could allow a malicious attacker to escalate privileges, disclose parameter information in the affected products, and cause a denial-of-service condition. 

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following Mitsubishi Electric Factory Automation products are affected: 

MELIPC Series 
MI5122-VM: All versions 
MI1002-W: All versions 
MI2012-W: All versions 
MI3321G-W: All versions 
MI3315G-W: All versions 

MELSEC iQ-R Series 
R102WCPU-W: All versions 

MELSEC Q Series 
Q24DHCCPU-V: All versions 
Q24DHCCPU-VG: All versions 
Q24DHCCPU-LS: All versions  
Q26DHCCPU-LS: All versions 

3.2 VULNERABILITY OVERVIEW

3.2.1 DEPENDENCY ON VULNERABLE THIRD-PARTY COMPONENT CWE-1395 

These vulnerabilities in Intel products could allow a malicious attacker to escalate privileges, disclose parameter information, and cause a denial-of-service condition in Mitsubishi Electric MELIPC, MELSEC iQ-R, and MELSEC Q Series products. 

CVE-2020-24489, CVE-2020-8670, CVE-2020-24512, CVE-2021-0146, CVE-2021-0089, CVE-2021-0086, CVE-2021-0127, CVE-2021-33150, CVE-2022-0002 has been assigned to these vulnerabilities. A worst-case CVSS v3 base score of 8.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H). 

3.3 BACKGROUND

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

3.4 RESEARCHER

Mitsubishi Electric reported these vulnerabilities to CISA. 

4. MITIGATIONS

Mitsubishi Electric recommends users refer to the following Intel advisories to assist in mitigating these vulnerabilities: 

CVE-2020-8670—INTEL-SA-00463 
CVE-2020-24489—INTEL-SA-00442 
CVE-2020-24512—INTEL-SA-00464 
CVE-2021-0127—INTEL-SA-00532 
CVE-2021-0146—INTEL-SA-00528 
CVE-2021-0086—INTEL-SA-00516 
CVE-2021-0089—INTEL-SA-00516 
CVE-2021-33150—INTEL-SA-00609 
CVE-2022-0002—INTEL-SA-00598 

For additional information, refer to Mitsubishi Electric’s bulletin. 

Mitsubishi Electric recommends that users take the following mitigation measures to minimize the risk of exploiting these vulnerabilities: 

Restrict physical access to the product from unauthorized users. 

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. 

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 exploits specifically target these vulnerabilities. These vulnerabilities are not exploitable remotely. These vulnerabilities have a high attack complexity.