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AUSCERT External Security Bulletin Redistribution
ESB-2023.0592
Advisory (icsa-23-031-01) Delta Electronics DOPSoft
1 February 2023
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AusCERT Security Bulletin Summary
---------------------------------
Product: Delta Electronics DOPSoft
Publisher: ICS-CERT
Operating System: Network Appliance
Resolution: Patch/Upgrade
CVE Names: CVE-2023-0124 CVE-2023-0123
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-23-031-01
Comment: CVSS (Max): 7.8 CVE-2023-0124 (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-23-031-01)
Delta Electronics DOPSoft
Original release date: January 31, 2023
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: Delta Electronics
o Equipment: DOPSoft
o Vulnerabilities: Stack-based Buffer Overflow, Out-of-bounds Write
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow for remote code
execution.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of DOPSoft, a human machine interface (HMI) editing
software, are affected:
o DOPSoft: versions 4.00.16.22 and prior
3.2 VULNERABILITY OVERVIEW
3.2.1 STACK-BASED BUFFER OVERFLOW CWE-121
Delta Electronics DOPSoft versions 4.00.16.22 and prior are vulnerable to a
stack-based buffer overflow, which could allow an attacker to remotely execute
arbitrary code when a malformed file is introduced to the software.
CVE-2023-0123 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 WRITE CWE-787
Delta Electronics DOPSoft versions 4.00.16.22 and prior are vulnerable to an
out-of-bounds write, which could allow an attacker to remotely execute
arbitrary code when a malformed file is introduced to the software.
CVE-2023-0124 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 ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Taiwan
3.4 RESEARCHER
Natnael Samson (@NattiSamson), working with Trend Micro's Zero Day Initiative,
reported these vulnerabilities to CISA.
4. MITIGATIONS
Delta Electronics released version 1.3.0 of DIAScreen (login required) and
recommends users to use DIAScreen instead of DOPSoft.
CISA recommends users take defensive measures to minimize the risk of
exploitation of these vulnerabilities. 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.
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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