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AUSCERT External Security Bulletin Redistribution
ESB-2022.6664
Advisory (icsa-22-356-04) Omron CX-Programmer
23 December 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: Omron CX-Programmer
Publisher: ICS-CERT
Operating System: Network Appliance
Windows
Resolution: Patch/Upgrade
CVE Names: CVE-2022-43509
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-22-356-04
Comment: CVSS (Max): 7.8 CVE-2022-43509 (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
CVSS Source: ICS-CERT
Calculator: https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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ICS Advisory (ICSA-22-356-04)
Omron CX-Programmer
Original release date: December 22, 2022
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: Omron
o Equipment: CX-Programmer
o Vulnerability: Out-of-bounds Write
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow arbitrary code
execution or loss of sensitive information if a user opens a specially crafted
CX-P file.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of CX-Programmer, part of a software automation suite,
are affected:
o CX-Programmer: Versions 9.78 and prior
3.2 VULNERABILITY OVERVIEW
3.2.1 OUT-OF-BOUNDS WRITE CWE-787
CX-Programmer is vulnerable to a Out-of-bounds Write when a user opens a
specially crafted CXP file. This could cause a loss of sensitive information or
arbitrary code execution.
CVE-2022-43509 has been assigned to this vulnerability. A CVSS v3 base score of
7.8 has been assigned; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U/C:H/
I:H/A:H ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Japan
3.4 RESEARCHER
Xinali, working with Trend Mirco's Zero Day Initiative, reported this
vulnerability to CISA. Michael Heinzl reported this vulnerability to JPCERT/CC.
4. MITIGATIONS
Omron released an update via "Auto Update Service" to fix the reported issues.
Omron recommends updating to Omron CX-Programmer v9.79
For more information, see the Omron release notes .
CISA recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability. Specifically, users should:
o Minimize network exposure for all control system devices and/or systems,
and ensure they are not accessible from the Internet .
o Locate control system networks and remote devices behind firewalls and
isolate them from business networks.
o When remote access is required, use secure methods, such as Virtual Private
Networks (VPNs), recognizing VPNs may have vulnerabilities and should be
updated to the most current version available. Also recognize VPN is only
as secure as its connected devices.
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 at 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 .
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.
CISA also recommends users take the following measures to protect themselves
from social engineering attacks:
o Do not click web links or open attachments in unsolicited 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.
This vulnerability is 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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