ICS Advisory (ICSA-20-245-01)

Mitsubishi Electric Multiple Products (Update C)

Click to Tweet.
Click to send to Facebook.
Click to Share.

Legal Notice

All information products included in https://us-cert.cisa.gov/ics are provided "as is" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained within. DHS does not endorse any commercial product or service, referenced in this product or otherwise. Further dissemination of this product is governed by the Traffic Light Protocol (TLP) marking in the header. For more information about TLP, see https://us-cert.cisa.gov/tlp/.


 

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 B) that was published May 18, 2021, to the ICS webpage on us-cert.cisa.gov.

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
  • Q24DHCCPU-V, all versions
  • Q24DHCCPU-VG, all versions
  • R12CCPU-V, Version 13 and prior
  • RD55UP06-V, Version 09 and prior
  • RD55UP12-V, Version 01
  • RJ71GN11-T2, Version 11 and prior

--------- Begin Update C Part 1 of 2 ---------

  • RD78Gn(n=4,8,16,32,64), Version 14 and prior
  • RD78GHV, Version 14 and prior
  • RD78GHW, Version 14 and prior

--------- End Update C Part 1 of 2 ---------

  • 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
  • GOT2000 Series GT21 Model, all versions
  • GS Series, all versions
  • 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
  • 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
  • GT25-J71GN13-T2, Version 04 or later

--------- Begin Update C Part 2 of 2 ---------

  •   RD78Gn(n=4,8,16,32,64), Version 16 or later
  •   RD78GHV, Version 16 or later
  •   RD78GHW, Version 16 or later

--------- End Update C Part 2 of 2 ---------

Please contact a Mitsubishi Electric representative for more information.

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 also provides a section for control systems security recommended practices on the ICS webpage on us-cert.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 us-cert.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 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

CISA continuously strives to improve its products and services. You can help by choosing one of the links below to provide feedback about this product.

This product is provided subject to this Notification and this Privacy & Use policy.

Please share your thoughts.

We recently updated our anonymous product survey; we'd welcome your feedback.