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AUSCERT External Security Bulletin Redistribution
ESB-2021.3527
Advisory (icsa-21-294-01) ICONICS GENESIS64 and Mitsubishi
Electric MC Works64
22 October 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: ICONICS GENESIS64
Mitsubishi Electric MC Works64
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-27041 CVE-2021-27040
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-21-294-01
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ICS Advisory (ICSA-21-294-01)
ICONICS GENESIS64 and Mitsubishi Electric MC Works64
Original release date: October 21, 2021
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
o CVSS v3 7.8
o ATTENTION: Low attack complexity
o Vendor: ICONICS, Mitsubishi Electric
o Equipment: ICONICS GENESIS64, Mitsubishi Electric MC Works64
o Vulnerabilities: Out-of-bounds Read, Out-of-bounds Write
2. RISK EVALUATION
Successful exploitation of these vulnerabilities may result in remote code
execution.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The vulnerabilities affect the following HMI SCADA products:
o GENESIS64 (all versions up to and including 10.97)
o MC Works64 (all version of MC Works64, up to and including Version 4.04E)
3.2 VULNERABILITY OVERVIEW
3.2.1 OUT-OF-BOUNDS WRITE CWE-787
A lack of proper validation of user-supplied data may result in a write past
the end of an allocated data structure. User interaction is required to exploit
this vulnerability as the target must attempt to import a malicious AutoCAD DWG
file into GraphWorX64.
CVE-2021-27041 has been assigned to this vulnerability. A CVSS v3 base score of
7.8 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U/
C:H/I:H/A:H ).
3.2.2 OUT-OF-BOUNDS READ CWE-125
A lack of proper validation of user-supplied data may allow reading past the
end of an allocated data structure. User interaction is required to exploit
this vulnerability as the target must visit a malicious page or open a
malicious file.
CVE-2021-27040 has been assigned to this vulnerability. A CVSS v3 base score of
3.3 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U/
C:L/I:N/A:N ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Multiple including Critical Manufacturing
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: ICONICS is headquartered in the United
States. Mitsubishi Electric is headquartered in Japan.
3.4 RESEARCHER
Michael DePlante of Trend Micro's Zero Day Initiative reported these
vulnerabilities to CISA.
4. MITIGATIONS
ICONICS and Mitsubishi Electric are releasing Critical Fix Rollups or patches
for these products. GENESIS64 Version 10.97.1 and later will not be vulnerable
to this exploit.
ICONICS and Mitsubishi Electric recommend users of these products take the
following mitigation steps:
o Use a firewall. Place control system networks and devices behind firewalls
and isolate them from the business network.
o Minimize network exposure for all control system devices. Control system
devices should not directly face the Internet.
o Do not click web links or open unsolicited attachments in email messages.
o When importing any AutoCad DWG file, make sure it is known to come from a
trusted source.
o Install the applicable Critical Fix Rollup , when available.
ICONICS provides information and useful links related to its security updates
at its company website .
Mitsubishi Electric provides information and useful links related to this
security update at its company website .
CISA 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.
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
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 these vulnerabilities. These
vulnerabilities are not exploitable remotely.
For any questions related to this report, please contact the CISA at:
Email: CISAservicedesk@cisa.dhs.gov
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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