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AUSCERT External Security Bulletin Redistribution
ESB-2022.4072
Advisory (icsa-22-228-03) Delta Industrial Automation DRAS
17 August 2022
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AusCERT Security Bulletin Summary
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Product: Delta Industrial Automation DRAS
Publisher: ICS-CERT
Operating System: Network Appliance
Windows
Resolution: Patch/Upgrade
CVE Names: CVE-2022-2759
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-22-228-03
Comment: CVSS (Max): 5.5 CVE-2022-2759 (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-22-228-03)
Delta Industrial Automation DRAS
Original release date: August 16, 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: Delta Robot Automation Studio (DRAS)
o Vulnerability: Improper Restriction of XML External Entity Reference.
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow an attacker to read
and exfiltrate sensitive information from the affected host machine.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of DRAS, a controller software suite, are affected:
o DRAS: All versions prior to 1.13.20
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER RESTRICTION OF XML EXTERNAL ENTITY REFERENCE CWE-611
The software processes an XML document that could contain XML entities with
URIs that resolve to documents outside of the intended sphere of control,
causing the product to embed incorrect documents into its output. This may
allow an attacker to view sensitive documents and information on the affected
host.
CVE-2022-2759 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 Zero's Day Initiative, reported this
vulnerability to CISA.
4. MITIGATIONS
Delta Electronics recommends users update DRAS to version 1.13.20 or later to
address this vulnerability.
CISA 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.
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/ics . 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/ics 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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