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AUSCERT External Security Bulletin Redistribution
Multiple Mitsubishi Electric Factory vulnerabilities
6 November 2020
AusCERT Security Bulletin Summary
Product: Mitsubishi Electric Factory Automation Engineering Products
Mitsubishi Electric Factory Automation Products
Mitsubishi Electric Multiple Factory Automation Engineering Products
Operating System: Network Appliance
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Modify Arbitrary Files -- Remote with User Interaction
Denial of Service -- Remote with User Interaction
Access Confidential Data -- Remote with User Interaction
CVE Names: CVE-2020-14523 CVE-2020-14521 CVE-2020-14496
Revision History: November 6 2020: ICS-CERT appended Update A to advisory
July 31 2020: Initial Release
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ICS Advisory (ICSA-20-212-04)
Mitsubishi Electric Factory Automation Engineering Products (Update A)
Original release date: November 05, 2020
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
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For more information about TLP, see https://us-cert.cisa.gov/tlp/ .
1. EXECUTIVE SUMMARY
o CVSS v3 8.3
o ATTENTION: Low skill level to exploit
o Vendor: Mitsubishi Electric
o Equipment: Mitsubishi Electric, Factory Automation Engineering products
o Vulnerability: Unquoted Search Path or Element
2. UPDATE INFORMATION
This updated advisory is a follow-up to the original advisory titled
ICSA-20-212-04 Mitsubishi Electric Factory Automation Engineering Products that
was published July 30, 2020, to the ICS webpage to us-cert.cisa.gov.
3. RISK EVALUATION
Successful exploitation of this vulnerability may allow an attacker to obtain
unauthorized information, modify information, and cause a denial-of-service
4. TECHNICAL DETAILS
4.1 AFFECTED PRODUCTS
The following products and versions are affected:
o C Controller Interface Module Utility, all versions
o C Controller Module Setting and Monitoring Tool, all versions
o CC-Link IE Control Network Data Collector, all versions
o CC-Link IE Field Network Data Collector, all versions
o CPU Module Logging Configuration Tool, Versions 1.100E and prior
o CW Configurator, Versions 1.010L and prior
- --------- Begin Update A Part 1 of 4 ---------
o Data Transfer, Versions 3.42U and prior
- --------- End Update A Part 1 of 4 ---------
o EZSocket, all versions
o FR Configurator SW3, all versions
o FR Configurator2, all versions
o GT Designer2 Classic, all versions
- --------- Begin Update A Part 2 of 4 ---------
o GT Designer3 Version1 (GOT1000), Versions 1.241B and prior
o GT Designer3 Version1 (GOT2000), Versions 1.241B and prior
o GT SoftGOT1000 Version3, Versions 3.200J and prior
o GT SoftGOT2000 Version1, Versions 1.241B and prior
- --------- End Update A Part 2 of 4 ---------
o GX Developer, Versions 8.504A and prior
o GX LogViewer, Versions 1.100E and prior
o GX Works2, all versions
o GX Works3, Versions 1.063R and prior
o M_CommDTM-IO-Link, all versions
o MELFA-Works, all versions
o MELSEC WinCPU Setting Utility, all versions
o MELSOFT Complete Clean Up Tool, all versions
o MELSOFT EM Software Development Kit, all versions
o MELSOFT iQ AppPortal, all versions
o MELSOFT Navigator, all versions
o MI Configurator, all versions
o Motion Control Setting, Versions 1.005F and prior
o Motorizer, Versions 1.005F and prior
o MR Configurator2, all versions
o MT Works2, all versions
o MTConnect Data Collector, all versions
o MX Component, all versions
- --------- Begin Update A Part 3 of 4 ---------
o MX MESInterface, Versions 1.21X and prior
o MX MESInterface-R, Versions 1.12N and prior
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o MX Sheet, all versions
o Network Interface Board CC IE Control Utility, all versions
o Network Interface Board CC IE Field Utility, all versions
o Network Interface Board CC-Link Ver.2 Utility, all versions
o Network Interface Board MNETH Utility, all versions
o Position Board utility 2, all versions
o PX Developer, all versions
o RT ToolBox2, all versions
o RT ToolBox3, all versions
o Setting/monitoring tools for the C Controller module, all versions
o SLMP Data Collector, all versions
4.2 VULNERABILITY OVERVIEW
4.2.1 UNQUOTED SEARCH PATH OR ELEMENT CWE-428
Multiple Mitsubishi Electric Factory Automation engineering software products
have a malicious code execution vulnerability. A malicious attacker could use
this vulnerability to obtain information, modify information, and cause a
CVE-2020-14521 has been assigned to this vulnerability. A CVSS v3 base score of
8.3 has been calculated; the CVSS vector string is ( AV:N/AC:H/PR:N/UI:R/S:C/
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Japan
Mashav Sapir of Claroty reported this vulnerability to CISA.
Mitsubishi Electric recommends the following mitigations:
- --------- Begin Update A Part 4 of 4 ---------
Please refer to the Mitsubishi Electric website for details on available
Download the latest version of each software product and update it.
- --------- End Update A Part 4 of 4 ---------
Refer to the manual for help to update affected products.
For users of a product that has not released a fixed version or who cannot
immediately update the product, Mitsubishi Electric recommends taking the
following mitigation measures to minimize risk:
o If a "File Name Warning" message is displayed when starting Windows, take
appropriate measures according to the instructions in the message (such as
changing a file name) and then install or operate the products.
o Operate the products under an account that does not have administrator
o Install an antivirus software in computers using the products.
o Restrict network exposure for all control system devices or systems to the
minimum necessary and ensure they are not accessible from untrusted
networks and hosts.
o Locate control system networks and remote devices behind firewalls and
isolate them from the network.
o Use virtual private network (VPN) when remote access is required.
Additional information about the vulnerabilities or Mitsubishi Electric's
compensating control is available by contacting a Mitsubishi Electric
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 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
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.
CISA also recommends users take the following measures to protect themselves
from social engineering attacks:
o Do not click web links or open unsolicited attachments in email messages.
o Refer to Recognizing and Avoiding Email Scams for more information on
avoiding email scams.
o Refer to Avoiding Social Engineering and Phishing Attacks for more
information on social engineering attacks.
No known public exploits specifically target this vulnerability.
For any questions related to this report, please contact the CISA at:
Toll Free: 1-888-282-0870
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.
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