ICS Advisory (ICSA-20-245-01)

Mitsubishi Electric Multiple Products (Update D)

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1. EXECUTIVE SUMMARY

  • CVSS v3 7.3
  • ATTENTION: Exploitable remotely/low attack complexity
  • Vendor: Mitsubishi Electric
  • Equipment: Multiple Products
  • Vulnerability: Predictable Exact Value from Previous Values

2. UPDATE INFORMATION

This updated advisory is a follow-up to the advisory update titled ICSA-20-245-01 Mitsubishi Electric Multiple Products (Update C) that was published September 9, 2021, to the ICS webpage on cisa.gov/ics.

3. RISK EVALUATION

Successful exploitation of this vulnerability could be used to hijack TCP sessions and allow remote command execution.

4. TECHNICAL DETAILS

4.1 AFFECTED PRODUCTS

  • QJ71MES96, all versions
  • QJ71WS96, all versions
  • Q06CCPU-V, all versions

--------- Begin Update D Part 1 of 4 ---------

  • Q24DHCCPU-V, the first 5 digits of serial number 24031 and prior
  • Q24DHCCPU-VG, the first 5 digits of serial number 24031 and prior

--------- End Update D Part 1 of 4 ---------

  • R12CCPU-V, Version 13 and prior
  • RD55UP06-V, Version 09 and prior
  • RD55UP12-V, Version 01
  • RJ71GN11-T2, Version 11 and prior
  • RD78Gn(n=4,8,16,32,64), Version 14 and prior
  • RD78GHV, Version 14 and prior
  • RD78GHW, Version 14 and prior
  • NZ2FT-MT, all versions
  • NZ2FT-EIP, all versions
  • Q03UDECPU, the first 5 digits of serial number 22081 and prior
  • QnUDEHCPU(n=04/06/10/13/20/26/50/100), the first 5 digits of serial number 22081 and prior
  • QnUDVCPU(n=03/04/06/13/26), the first 5 digits of serial number 22031 and prior
  • QnUDPVCPU(n=04/06/13/26), the first 5 digits of serial number 22031 and prior
  • LnCPU(-P)(n=02/06/26), the first 5 digits of serial number 22051 and prior
  • L26CPU-(P)BT, the first 5 digits of serial number 22051 and prior
  • RnCPU(n=00/01/02), Version 18 and prior
  • RnCPU(n=04/08/16/32/120), Version 50 and prior
  • RnENCPU(n=04/08/16/32/120), Version 50 and prior
  • RnSFCPU (n=08/16/32/120), Version 22 and prior
  • RnPCPU(n=08/16/32/120), Version 24 and prior
  • RnPSFCPU(n=08/16/32/120), Version 05 and prior
  • FX5U(C)-**M*/**
    • Case1: Serial number 17X**** or later: Version 1.210 and prior
    • Case2: Serial number 179**** and prior: Version 1.070 and prior
  • FX5UC-32M*/**-TS, Version 1.210 and prior
  • FX5UJ-**M*/**, Version 1.000
  • FX5-ENET, Version 1.002 and prior
  • FX5-ENET/IP, Version 1.002 and prior
  • FX3U-ENET-ADP, Version 1.22 and prior
  • FX3GE-**M*/**, the first 3 digits of serial number 20X and prior
  • FX3U-ENET, Version 1.14 and prior
  • FX3U-ENET-L, Version 1.14 and prior
  • FX3U-ENET-P502, Version 1.14 and prior
  • FX5-CCLGN-MS, Version 1.000
  • IU1-1M20-D, all versions
  • LE7-40GU-L, all versions

--------- Begin Update D Part 2 of 4 ---------

    • GOT2000 Series GT21 Model, Version 01.44.000 and prior
    • GS Series GS21 Model, Version 01.44.000 and prior

    --------- End Update D Part 2 of 4 ---------

      • GOT1000 Series GT14 Model, all versions
      • FR-A800-E Series, production date December 2020 and prior
      • FR-F800-E Series, production date December 2020 and prior
      • FR-A8NCG, Production date August 2020 and prior
      • FR-E800-EPA Series, Production date July 2020 and prior
      • FR-E800-EPB Series, Production date July 2020 and prior
      • Conveyor Tracking Application APR-nTR3FH, APR-nTR6FH, APR-nTR12FH, APR-nTR20FH(n=1,2), all versions (Discontinued product)
      • MR-JE-C, all versions
      • MR-J4-TM, all versions
      • RJ71EN71, Version 48 and prior
      • QJ71E71-100, the first 5 digits of serial number 21092 and prior
      • LJ71E71-100, the first 5 digits of serial number 21092 and prior
      • QJ71MT91, the first 5 digits of serial number 20082 and prior
      • NZ2GACP620-60, Version 1.03D and prior
      • NZ2GACP620-300, Version 1.03D and prior
      • GT25-J71GN13-T2, Version 03 and prior

      4.2 VULNERABILITY OVERVIEW

      4.2.1    PREDICTABLE EXACT VALUE FROM PREVIOUS VALUES CWE-342

      The affected products are vulnerable to impersonation of a legitimate device by a malicious actor, which may allow an attacker to remotely execute arbitrary commands.

      CVE-2020-16226 has been assigned to this vulnerability. A CVSS v3 base score of 7.3 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).

      4.3 BACKGROUND

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

      4.4 RESEARCHER

      Ta-Lun Yen of TXOne IoT/ICS Security Research Labs of Trend Micro, working with Trend Micro’s Zero Day Initiative, reported this vulnerability to CISA.

      5. MITIGATIONS

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

      • Use a firewall or VPN, etc., to prevent unauthorized access when Internet access is required.
      • Use within a LAN and ensure that they are not accessible from untrusted networks and hosts.
      • Install an antivirus software in your computer to access the product.

      Mitsubishi also recommends users update the following products to their respective versions: 

      • R12CCPU-V, Version 14 or later
      • RD55UP06-V, Version 10 or later
      • RD55UP12-V, Version 02 or later
      • RJ71GN11-T2, Version 12 or later
      • Q03UDECPU, the first 5 digits of serial number 22082 or later

      --------- Begin Update D Part 3 of 4 ---------

      • Q24DHCCPU-V: the first 5 digits of serial number 24032 or later
      • Q24DHCCPU-VG: the first 5 digits of serial number 24032 or later

      --------- End Update D Part 3 of 4 ---------

      • QnUDEHCPU(n=04/06/10/13/20/26/50/100), the first 5 digits of serial number 22082 or later
      • QnUDVCPU(n=03/04/06/13/26), the first 5 digits of serial number 22032 or later
      • QnUDPVCPU(n=04/06/13/26), the first 5 digits of serial number 22032 or later
      • LnCPU(-P)(n=02/06/26), the first 5 digits of serial number 22052 or later
      • L26CPU-(P)BT, the first 5 digits of serial number 22052 or later
      • RnSFCPU (n=08/16/32/120), Version 23 or later
      • RnPSFCPU(n=08/16/32/120), Version 06 or later
      • RnPCPU(n=08/16/32/120), Version 25 or later
      • RnCPU(n=00/01/02), Version 18 and prior: Update to Version 19 or later
      • RnCPU(n=04/08/16/32/120), Version 50 and prior. Please update to Version 51 or later
      • RnENCPU(n=04/08/16/32/120), Versions 50 and prior: Update to Version 51 or later
      • FX5U(C)-**M*/**
      • Case1: Serial number 17X**** or later, Version 1.210 and prior: Update to Version 1.211 or later
      • Case2: Serial number 179**** and prior, Version 1.070 and prior: Update to Version 1.071 or later
      • FX5UC-32M*/**-TS, Version 1.210 and prior: Update to Version 1.211 or later
      • FX5UJ-**M*/**, Version 1.000: Update to Version 1.001 or later
      • FX5-ENET, Version 1.003 or later
      • FX5-ENET/IP, Version 1.003 or later
      • FX3U-ENET-ADP, Version 1.24 or later
      • FX3GE-**M*/**, the first 3 digits of serial number 20Y or later
      • FX3U-ENET, Version 1.16 or later
      • FX3U-ENET-L, Version 1.16 or later
      • FX3U-ENET-P502, Version 1.16 or later
      • FX5-CCLGN-MS, Version 1.001 or later
      • FR-A800-E Series, production date January 2021 or later
      • FR-F800-E Series, production date January 2021 or later
      • FR-A8NCG, production date September 2020 or later
      • FR-E800-EPA Series, production date August 2020 or later
      • FR-E800-EPB Series, production date August 2020 or later
      • RJ71EN71, Version 49 or later
      • QJ71E71-100, the first 5 digits of serial number 22102 or later
      • LJ71E71-100, the first 5 digits of serial number 22102 or later
      • QJ71MT91, the first 5 digits of serial number 22102 or later
      • NZ2GACP620-60, Version 1.04E or later
      • NZ2GACP620-300, Version 1.04E or later

      --------- Begin Update D Part 4 of 4 ---------

      • GOT2000 Series GT21 Model, Version 01.45.000 or later
      • GS Series GS21 Model, Version 01.45.000 or later

      --------- End Update D Part 4 of 4 ---------

      • GT25-J71GN13-T2, Version 04 or later
      • RD78Gn(n=4,8,16,32,64), Version 16 or later
      • RD78GHV, Version 16 or later
      • RD78GHW, Version 16 or later

      Please contact a Mitsubishi Electric representative for more information.

      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 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/ics 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 this vulnerability.


      Contact Information

      For any questions related to this report, please contact the CISA at:

      Email: CISAservicedesk@cisa.dhs.gov
      Toll Free: 1-888-282-0870

      For industrial control systems cybersecurity information:  https://us-cert.cisa.gov/ics 
      or incident reporting:  https://us-cert.cisa.gov/report

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