Mitsubishi Electric Multiple Factory Automation Products (Update A)

ICSA-24-058-01

Mitsubishi Electric Multiple Factory Automation Products (Update A)

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1. EXECUTIVE SUMMARY

• CVSS v3 5.3
• ATTENTION: Exploitable remotely/low attack complexity
• Vendor: Mitsubishi Electric Corporation
• Equipment: Multiple Factory Automation products
• Vulnerability: Insufficient Resource Pool

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow a remote attacker to cause a temporary denial-of-service (DoS) condition for a certain period of time in the product's Ethernet communication by performing a TCP SYN Flood attack.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of Mitsubishi Electric Factory Automation products are affected:

• MELSEC iQ-R series CPU module R00CPU: All Versions
• MELSEC iQ-R series CPU module R01CPU: All Versions
• MELSEC iQ-R series CPU module R02CPU: All Versions
• MELSEC iQ-R series CPU module R04 (EN)CPU: All Versions
• MELSEC iQ-R series CPU module R08 (EN)CPU: All Versions
• MELSEC iQ-R series CPU module R16 (EN)CPU: All Versions
• MELSEC iQ-R series CPU module R32(EN)CPU: All Versions
• MELSEC iQ-R series CPU module R120(EN)CPU: All Versions
• MELSEC iQ-R series CPU module R08SFCPU: All Versions
• MELSEC iQ-R series CPU module R16SFCPU: All Versions
• MELSEC iQ-R series CPU module R32SFCPU: All Versions
• MELSEC iQ-R series CPU module R120SFCPU: All Versions
• MELSEC iQ-R series CPU module R08PCPU: All Versions
• MELSEC iQ-R series CPU module R16PCPU: All Versions
• MELSEC iQ-R series CPU module R32PCPU: All Versions
• MELSEC iQ-R series CPU module R120PCPU: All Versions
• MELSEC iQ-R series CPU module R08PSFCPU: All Versions
• MELSEC iQ-R series CPU module R16PSFCPU: All Versions
• MELSEC iQ-R series CPU module R32PSFCPU: All Versions
• MELSEC iQ-R series CPU module R120PSFCPU: All Versions
• MELSEC iQ-L series CPU module L04HCPU(sold in limited regions): All Versions
• MELSEC iQ-L series CPU module L08HCPU(sold in limited regions): All Versions
• MELSEC iQ-L series CPU module L16HCPU(sold in limited regions): All Versions
• MELSEC iQ-L series CPU module L32HCPU(sold in limited regions): All Versions
• MELSEC iQ-R Ethernet Interface Module RJ71EN71: All Versions
• MELSEC iQ-R CC-Link IE TSN Master/Local Module RJ71GN11-T2: All Versions
• MELSEC iQ-R CC-Link IE TSN Master/Local Module RJ71GN11-SX: All Versions
• MELSEC iQ-R CC-Link IE TSN Master/Local Module RJ71GN11-EIP: All Versions
• CC-Link IE TSN Remote I/O Module NZ2GN2B1-32D: All Versions
• CC-Link IE TSN Remote I/O Module NZ2GN2B1-32T: All Versions
• CC-Link IE TSN Remote I/O Module NZ2GN2B1-32TE: All Versions
• CC-Link IE TSN Remote I/O Module NZ2GN2B1-32DT: All Versions
• CC-Link IE TSN Remote I/O Module NZ2GN2B1-32DTE: All Versions
• CC-Link IE TSN Remote I/O Module NZ2GN2B1-16D: All Versions
• CC-Link IE TSN Remote I/O Module NZ2GN2B1-16T: All Versions
• CC-Link IE TSN Remote I/O Module NZ2GN2B1-16TE: All Versions
• CC-Link IE TSN Remote I/O Module NZ2GN2S1-32D: All Versions
• CC-Link IE TSN Remote I/O Module NZ2GN2S1-32T: All Versions
• CC-Link IE TSN Remote I/O Module NZ2GN2S1-32TE: All Versions
• CC-Link IE TSN Remote I/O Module NZ2GN2S1-32DT: All Versions
• CC-Link IE TSN Remote I/O Module NZ2GN2S1-32DTE: All Versions
• CC-Link IE TSN Remote I/O Module NZ2GN2S1-16D: All Versions
• CC-Link IE TSN Remote I/O Module NZ2GN2S1-16T: All Versions
• CC-Link IE TSN Remote I/O Module NZ2GN2S1-16TE: All Versions
• CC-Link IE TSN Remote I/O Module NZ2GNCF1-32D: All Versions
• CC-Link IE TSN Remote I/O Module NZ2GNCF1-32T: All Versions
• CC-Link IE TSN Remote I/O Module NZ2GNCE3-32D: All Versions
• CC-Link IE TSN Remote I/O Module NZ2GNCE3-32DT: All Versions
• CC-Link IE TSN Remote I/O Module NZ2GN12A4-16D: All Versions
• CC-Link IE TSN Remote I/O Module NZ2GN12A4-16DE: All Versions
• CC-Link IE TSN Remote I/O Module NZ2GN12A2-16T: All Versions
• CC-Link IE TSN Remote I/O Module NZ2GN12A2-16TE: All Versions
• CC-Link IE TSN Remote I/O Module NZ2GN12A42-16DT: All Versions
• CC-Link IE TSN Remote I/O Module NZ2GN12A42-16DTE: All Versions
• CC-Link IE TSN Analog-Digital Converter Module NZ2GN2S-60AD4: All Versions
• CC-Link IE TSN Analog-Digital Converter Module NZ2GN2B-60AD4: All Versions
• CC-Link IE TSN Digital-Analog Converter Module NZ2GN2S-60DA4: All Versions
• CC-Link IE TSN Digital-Analog Converter Module NZ2GN2B-60DA4: All Versions
• CC-Link IE TSN - CC-Link IE Field Network Bridge Module NZ2GN-GFB: All Versions
• CC-Link IE TSN - AnyWireASLINK Bridge Module NZ2AW1GNAL: All Versions
• CC-Link IE TSN FPGA Module NZ2GN2S-D41P01: All Versions
• CC-Link IE TSN FPGA Module NZ2GN2S-D41D01: All Versions
• CC-Link IE TSN FPGA Module NZ2GN2S- D41PD02: All Versions
• CC-Link IE TSN Remote Station Communication LSI CP620 with GbE-PHY NZ2GACP620-300: All Versions
• CC-Link IE TSN Remote Station Communication LSI CP620 with GbE-PHY NZ2GACP620-60: All Versions
• MELSEC iQ-R Motion Module RD78G4: All Versions
• MELSEC iQ-R Motion Module RD78G8: All Versions
• MELSEC iQ-R Motion Module RD78G16: All Versions
• MELSEC iQ-R Motion Module RD78G32: All Versions
• MELSEC iQ-R Motion Module RD78G64: All Versions
• MELSEC iQ-R Motion Module RD78GHV: All Versions
• MELSEC iQ-R Motion Module RD78GHW: All Versions
• MELSEC iQ-L Motion Module LD78G4(sold in limited regions): All Versions
• MELSEC iQ-L Motion Module LD78G16(sold in limited regions): All Versions
• MELSEC iQ-F FX5 Motion Module FX5-40SSC-G: All Versions
• MELSEC iQ-F FX5 Motion Module FX5-80SSC-G: All Versions
• MELSEC iQ-F Series CPU module FX5U-32MT/ES: All Versions
• MELSEC iQ-F Series CPU module FX5U-32MT/DS: All Versions
• MELSEC iQ-F Series CPU module FX5U-32MT/ESS: All Versions
• MELSEC iQ-F Series CPU module FX5U-32MT/DSS: All Versions
• MELSEC iQ-F Series CPU module FX5U-32MR/ES: All Versions
• MELSEC iQ-F Series CPU module FX5U-32MR/DS: All Versions
• MELSEC iQ-F Series CPU module FX5U-64MT/ES: All Versions
• MELSEC iQ-F Series CPU module FX5U-64MT/DS: All Versions
• MELSEC iQ-F Series CPU module FX5U-64MT/ESS: All Versions
• MELSEC iQ-F Series CPU module FX5U-64MT/DSS: All Versions
• MELSEC iQ-F Series CPU module FX5U-64MR/ES: All Versions
• MELSEC iQ-F Series CPU module FX5U-64MR/DS: All Versions
• MELSEC iQ-F Series CPU module FX5U-80MT/ES: All Versions
• MELSEC iQ-F Series CPU module FX5U-80MT/DS: All Versions
• MELSEC iQ-F Series CPU module FX5U-80MT/ESS: All Versions
• MELSEC iQ-F Series CPU module FX5U-80MT/DSS: All Versions
• MELSEC iQ-F Series CPU module FX5U-80MR/ES: All Versions
• MELSEC iQ-F Series CPU module FX5U-80MR/DS: All Versions
• MELSEC iQ-F Series CPU module FX5UC-32MT/D: All Versions
• MELSEC iQ-F Series CPU module FX5UC-32MT/DSS: All Versions
• MELSEC iQ-F Series CPU module FX5UC-64MT/D: All Versions
• MELSEC iQ-F Series CPU module FX5UC-64MT/DSS: All Versions
• MELSEC iQ-F Series CPU module FX5UC-96MT/D: All Versions
• MELSEC iQ-F Series CPU module FX5UC-96MT/DSS: All Versions
• MELSEC iQ-F Series CPU module FX5UC-32MT/DS-TS: All Versions
• MELSEC iQ-F Series CPU module FX5UC-32MT/DSS-TS: All Versions
• MELSEC iQ-F Series CPU module FX5UC-32MR/DS-TS: All Versions
• MELSEC iQ-F Series CPU module FX5UJ-24MT/ES: All Versions
• MELSEC iQ-F Series CPU module FX5UJ-24MT/DS: All Versions
• MELSEC iQ-F Series CPU module FX5UJ-24MT/ESS: All Versions
• MELSEC iQ-F Series CPU module FX5UJ-24MT/DSS: All Versions
• MELSEC iQ-F Series CPU module FX5UJ-24MR/ES: All Versions
• MELSEC iQ-F Series CPU module FX5UJ-24MR/DS: All Versions
• MELSEC iQ-F Series CPU module FX5UJ-40MT/ES: All Versions
• MELSEC iQ-F Series CPU module FX5UJ-40MT/DS: All Versions
• MELSEC iQ-F Series CPU module FX5UJ-40MT/ESS: All Versions
• MELSEC iQ-F Series CPU module FX5UJ-40MT/DSS: All Versions
• MELSEC iQ-F Series CPU module FX5UJ-40MR/ES: All Versions
• MELSEC iQ-F Series CPU module FX5UJ-40MR/DS: All Versions
• MELSEC iQ-F Series CPU module FX5UJ-60MT/ES: All Versions
• MELSEC iQ-F Series CPU module FX5UJ-60MT/DS: All Versions
• MELSEC iQ-F Series CPU module FX5UJ-60MT/ESS: All Versions
• MELSEC iQ-F Series CPU module FX5UJ-60MT/DSS: All Versions
• MELSEC iQ-F Series CPU module FX5UJ-60MR/ES: All Versions
• MELSEC iQ-F Series CPU module FX5UJ-60MR/DS: All Versions
• MELSEC iQ-F Series CPU module FX5UJ-24MT/ES-A (sold in limited regions): All Versions
• MELSEC iQ-F Series CPU module FX5UJ-24MR/ES-A (sold in limited regions): All Versions
• MELSEC iQ-F Series CPU module FX5UJ-40MT/ES-A (sold in limited regions): All Versions
• MELSEC iQ-F Series CPU module FX5UJ-40MR/ES-A (sold in limited regions): All Versions
• MELSEC iQ-F Series CPU module FX5UJ-60MT/ES-A (sold in limited regions): All Versions
• MELSEC iQ-F Series CPU module FX5UJ-60MR/ES-A (sold in limited regions): All Versions
• MELSEC iQ-F Series CPU module FX5S-30MT/ES: All Versions
• MELSEC iQ-F Series CPU module FX5S-30MT/ESS: All Versions
• MELSEC iQ-F Series CPU module FX5S-30MR/ES: All Versions
• MELSEC iQ-F Series CPU module FX5S-40MT/ES: All Versions
• MELSEC iQ-F Series CPU module FX5S-40MT/ESS: All Versions
• MELSEC iQ-F Series CPU module FX5S-40MR/ES: All Versions
• MELSEC iQ-F Series CPU module FX5S-60MT/ES: All Versions
• MELSEC iQ-F Series CPU module FX5S-60MT/ESS: All Versions
• MELSEC iQ-F Series CPU module FX5S-60MR/ES: All Versions
• MELSEC iQ-F Series CPU module FX5S-80MT/ES (sold in limited regions): All versions
• MELSEC iQ-F Series CPU module FX5S-80MT/ESS (sold in limited regions): All versions
• MELSEC iQ-F Series CPU module FX5S-80MR/ES (sold in limited regions): All versions
• MELSEC iQ-F Series Ethernet module FX5-ENET: All Versions
• MELSEC iQ-F Series Ethernet/IP module FX5-ENET/IP: All Versions
• MELSEC iQ-F Series OPC UA Module FX5-OPC: All Versions
• MELSEC iQ-F Series CC-Link IE TSN master/local module FX5-CCLGN-MS: All Versions
• GOT2000 Series CC-Link IE TSN Communication Unit GT25-J71GN13-T2: All Versions
• FR-A800-E series inverters FR-A800-E series: All Versions
• FR-F800-E series inverters FR-F800-E series: All Versions
• FR-E800-E series inverters FR-E800-E series: All Versions
• INVERTER CC-Link IE TSN Plug-in option FR-A8NCG: All Versions
• INVERTER CC-Link IE TSN Safety Plug-in option FR-A8NCG-S: All Versions
• INVERTER CC-Link IE TSN communication function built-in type FR-A800-GN: All Versions
• MR-J5 series AC Servos MELSERVO MR-J5-A series: All Versions
• MR-J5 series AC Servos MELSERVO MR-J5-G series: All Versions
• MR-J5 series AC Servos MELSERVO MR-J5W-G series: All Versions
• MR-J5 series AC Servos MELSERVO MR-J5D-G series: All Versions
• MR-JET series AC Servos MELSERVO MR-JET-G series (sold in limited regions): All Versions
• MR-MD333G series AC Servos MELSERVO MR-MD333G series: All Versions
• MR-JE series AC Servos MELSERVO MR-JE-C series (sold in limited regions): All Versions
• MELSERVO-J4 AC Servos MELSERVO MR-J4-GF series: Version A4 or later
• Embedded Type Servo System Controller MR-EM441G series: All Versions

3.2 Vulnerability Overview

3.2.1 Insufficient Resource Pool CWE-410

In Mitsubishi Electric multiple FA products there is a denial-of-service (DoS) vulnerability that exists in the Ethernet function. A remote attacker could cause a temporary denial-of-service (DoS) condition for a certain period of time in the product's Ethernet communication by performing a TCP SYN Flood attack.

CVE-2023-7033 has been assigned to this vulnerability. A CVSS v3.1 base score of 5.3 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

3.3 BACKGROUND

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

3.4 RESEARCHER

Mitsubishi Electric Corporation reported this vulnerability to CISA.

4. MITIGATIONS

Mitsubishi Electric has no plans to release a fixed version, so they kindly ask users to address this issue through the following mitigation measures to minimize the risk of exploiting this vulnerability:

• Use a firewall, virtual private network (VPN) etc., to prevent unauthorized access when Internet access is required.
• Use within a LAN and block access from untrusted networks and hosts through firewalls.
• Use IP filter function to block access from untrusted hosts.
• Restrict physical access to the affected products and the LAN to which they are connected.

The IP filter function can be set on the following models. For details on the IP filter function, please refer to the following manual for each product:

• "1.13 IP Filter" in the MELSEC iQ-R Ethernet User's Manual (Application)
• MELSEC iQ-L CPU 模块用户手册(应用篇) 24.1 IP 滤波器功能
• "1.4 Security/IP filter" in the MELSEC iQ-R Motion Module User's Manual (Network)
• MELSEC iQ-L 运动模块用户手册(网络篇) 1.4 安全 IP 滤波器
• "3.5 Security/IP filter" in the MELSEC iQ-F FX5 Motion Module User's Manual (CC-Link IE TSN)
• "13.1 IP Filter Function" in the MELSEC iQ-F FX5 User's Manual (Communication)
• "12.1 IP Filter Function" in the MELSEC iQ-F FX5 User's Manual (Ethernet Communication)
• "4.4 IP Filter" in the MELSEC iQ-F FX5 OPC UA Module User's Manual
• "4.5.1 IP Filter" in the MELSEC iQ-F FX5 OPC UA Module User's Manual

For specific update instructions and additional details refer to Mitsubishi Electric advisory 2023-023

CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. 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/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.

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/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 exploitation specifically targeting this vulnerability has been reported to CISA at this time.

5. UPDATE HISTORY

• February 27, 2024: Initial Publication
• January 16, 2025: Update A - Added detail to affected product and mitigation sections.

• Mitsubishi Electric