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AUSCERT External Security Bulletin Redistribution
Multiple vulnerabilities have been identified in Delta
Electronics CNCSoft and ScreenEditor
8 August 2018
AusCERT Security Bulletin Summary
Product: Delta Electronics CNCSoft and ScreenEditor
Operating System: Windows
Impact/Access: Administrator Compromise -- Remote with User Interaction
Denial of Service -- Remote with User Interaction
CVE Names: CVE-2018-10636 CVE-2018-10598
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Delta Electronics CNCSoft and ScreenEditor
Original release date: August 07, 2018
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1. EXECUTIVE SUMMARY
CVSS v3 8.8
ATTENTION: Exploitable remotely/low skill level to exploit
Vendor: Delta Electronics
Equipment: CNCSoft and ScreenEditor
Vulnerabilities: Stack-based Buffer Overflow, Out-of-Bounds Read
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow an attacker to
gain remote code execution with administrator privileges.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
According to Delta Electronics, the following products are affected:
CNCSoft Version 1.00.83 and prior, and the accompanying,
ScreenEditor Version 1.00.54
3.2 VULNERABILITY OVERVIEW
3.2.1 STACK-BASED BUFFER OVERFLOW CWE-121
Multiple stack-based buffer overflow vulnerabilities cause the software to
crash due to lacking user input validation before copying data from project
files onto the stack.
CVE-2018-10636 has been assigned to this vulnerability. A CVSS v3 base score
of 8.8 has been assigned; the CVSS vector string is
3.2.2 OUT-OF-BOUNDS READ CWE-125
Two out-of-bounds read vulnerabilities cause the software to crash due to
lacking user input validation for processing project files.
CVE-2018-10598 has been assigned to this vulnerability. A CVSS v3 base score
of 4.3 has been assigned; the CVSS vector string is
CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
COUNTRIES/AREAS DEPLOYED: Worldwide
COMPANY HEADQUARTERS LOCATION: Taiwan
Mat Powell working with Trend Micros Zero Day Initiative reported these
vulnerabilities to NCCIC.
Delta Electronics recommends the following:
Update to the latest version of CNCSoft, v1.01.09. The updated version can be
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:
Minimize network exposure for all control system devices and/or systems, and
ensure that they are not accessible from the Internet.
Locate control system networks and remote devices behind firewalls, and
isolate them from the business network.
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
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.
No known public exploits specifically target these vulnerabilities.
For any questions related to this report, please contact the NCCIC at:
Toll Free: 1-888-282-0870
For industrial control systems cybersecurity information:
or incident reporting: https://ics-cert.us-cert.gov/Report-Incident?
The NCCIC continuously strives to improve its products and services. You can
help by choosing one of the links below to provide feedback about this
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