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AUSCERT External Security Bulletin Redistribution
ESB-2022.1718
Advisory (icsa-22-104-01) Delta Electronics DMARS
20 April 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: Delta Electronics DMARS
Publisher: ICS-CERT
Operating System: Network Appliance
Resolution: Patch/Upgrade
CVE Names: CVE-2022-1331
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-22-104-01
Comment: CVSS (Max): 5.5 CVE-2022-1331 (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N)
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:N/A:N
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ICS Advisory (ICSA-22-104-01)
Delta Electronics DMARS
Original release date: April 14, 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 5.5
o ATTENTION: Low attack complexity
o Vendor: Delta Electronics
o Equipment: DMARS
o Vulnerability: Improper Restriction of XML External Entity Reference
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow an attacker to gain
sensitive information.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of DMARS, a Motion Controller program development tool,
are affected:
o DMARS: All versions prior to v2.1.10.24
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER RESTRICTION OF XML EXTERNAL ENTITY REFERENCE CWE-611
In four instances the affected product does not properly restrict references of
XML external entities while processing specific project files, which may allow
unauthorized information disclosure.
CVE-2022-1331 has been assigned to this vulnerability. A CVSS v3 base score of
5.5 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U/
C:H/I:N/A:N ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Taiwan
3.4 RESEARCHER
Kimiya, working with Trend Micro's Zero Day Initiative, reported this
vulnerability to CISA.
4. MITIGATIONS
Delta Electronics recommends users update to the latest version. Users can
obtain the update by contacting Delta Electronics' corresponding FAE (Field
Application Engineer) or solution center.
Delta Electronics also recommends the following:
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 the business network.
o Never connect programming software to any network other than the network
intended for that device.
o When remote access is required, use secure methods, such as virtual private
networks (VPNs), recognizing a VPN is only as secure as its connected
devices.
CISA recommends users take the following measures to protect themselves from
social engineering attacks:
o Only use project files from trusted sources.
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 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 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. 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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