Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2021.1526
Advisory (icsa-21-124-02) Delta Electronics CNCSoft ScreenEditor
5 May 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Delta Electronics CNCSoft ScreenEditor
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-22672
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-21-124-02
- --------------------------BEGIN INCLUDED TEXT--------------------
ICS Advisory (ICSA-21-124-02)
Delta Electronics CNCSoft ScreenEditor
Original release date: May 04, 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: Exploitable remotely/low attack complexity
o Vendor: Delta Electronics
o Equipment: CNCSoft ScreenEditor
o Vulnerability: Out-of-bounds Write
2. RISK EVALUATION
Successful exploitation of this vulnerability could crash the device, and an
out-of-bounds write may allow remote code execution.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of CNCSoft ScreenEditor, a software management platform,
are affected:
o CNCSoft ScreenEditor versions prior to v1.01.28
3.2 VULNERABILITY OVERVIEW
3.2.1 OUT-OF-BOUNDS WRITE CWE-787
An out-of-bounds write vulnerability exists and could cause the corruption of
data, a denial-of-service condition, or allow code execution. The vulnerability
may allow an attacker to remotely execute arbitrary code.
CVE-2021-22672 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
Kimiya, working with Trend Micro Zero's Day Initiative, reported this
vulnerability to CISA.
4. MITIGATIONS
Delta Electronics has released an updated version of CNCSoft ScreenEditor and
recommends users install update v1.01.30 on all affected systems.
Delta Electronics also recommends users restrict the interaction of the
application to trusted files.
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 this vulnerability.
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.
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
https://www.auscert.org.au/bulletins/
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967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=1sVL
-----END PGP SIGNATURE-----