Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2019.0519
Delta Industrial Automation CNCSoft
20 February 2019
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: CNCSoft ScreenEditor
Publisher: US-CERT
Operating System: Windows
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
Denial of Service -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2019-6547
Original Bulletin:
https://ics-cert.us-cert.gov/advisories/ICSA-19-050-02
- --------------------------BEGIN INCLUDED TEXT--------------------
Advisory (ICSA-19-050-02)
Delta Industrial Automation CNCSoft
Original release date: February 19, 2019
1. EXECUTIVE SUMMARY
o CVSS v3 4.4
o ATTENTION: Low skill level to exploit
o Vendor: Delta Electronics (Delta)
o Equipment: Delta Industrial Automation CNCSoft
o Vulnerability: Out-of-bounds Read
2. RISK EVALUATION
Successful exploitation of this vulnerability could cause a buffer overflow
condition that may allow information disclosure or crash the application.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of Delta Industrial Automation CNCSoft, are affected:
o CNCSoft ScreenEditor Version 1.00.84 and prior.
3.2 VULNERABILITY OVERVIEW
3.2.1 OUT-OF-BOUNDS READ CWE-125
An out-of-bounds read vulnerability may cause the software to crash due to
lacking user input validation for processing project files.
CVE-2019-6547 has been assigned to this vulnerability. A CVSS v3 base score of
4.4 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:L
/I:N/A:L).
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
(ZDI) reported this vulnerability to NCCIC.
4. MITIGATIONS
Delta recommends the following:
o Update to the latest version of CNCSoft v1.01.15. This updated version can
be found at:
http://www.deltaww.com/services/DownloadCenter2.aspx?secID=8&pid=2&tid=0&CID=06
&itemID=060202&typeID=1&downloadID=&title=&dataType=8;&check=1&hl=en-US
o Restrict the interaction with the application to trusted files.
NCCIC 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 that 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 When remote access is required, use secure methods, such as Virtual Private
Networks (VPNs), recognizing that VPNs may have vulnerabilities and should
be updated to the most current version available. Also recognize that VPN
is only as secure as the connected devices.
NCCIC reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
NCCIC also provides a section for control systems security recommended
practices on the ICS-CERT web page. 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-CERT website 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 NCCIC for tracking
and correlation against other incidents.
NCCIC also recommends that 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.
No known public exploits specifically target this vulnerability. This
vulnerability is not exploitable remotely.
Legal Notice
All information products included in http://ics-cert.us-cert.gov 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 http://www.us-cert.gov/tlp/.
- --------------------------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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=Zzbu
-----END PGP SIGNATURE-----