1. EXECUTIVE SUMMARY
- CVSS v3 7.8
- ATTENTION: Low skill level to exploit
- Vendor: Delta Electronics
- Equipment: CNCSoft-B
- Vulnerabilities: Out-of-bounds Write, Out-of-bounds Read, Untrusted Pointer Dereference, Type Confusion
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could lead to arbitrary code execution.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of CNCSoft-B, a software management platform, are affected:
- CNCSoft-B Versions 184.108.40.206 and prior
3.2 VULNERABILITY OVERVIEW
The affected product is vulnerable to an out-of-bounds write while processing project files, which may allow an attacker to execute arbitrary code.
The affected product is vulnerable to an out-of-bounds read while processing project files, which may allow an attacker to execute arbitrary code.
The affected product has a null pointer dereference issue while processing project files, which may allow an attacker to execute arbitrary code.
The affected product has a type confusion issue while processing project files, which may allow an attacker to execute arbitrary code.
- CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
- COUNTRIES/AREAS DEPLOYED: Worldwide
- COMPANY HEADQUARTERS LOCATION: Taiwan
Kimiya, working with Trend Micro’s Zero Day Initiative, reported these vulnerabilities to CISA.
Delta Electronics has released an updated version for CNCSoft-B and recommends users install v220.127.116.11 on all affected systems.
CISA 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.
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.
CISA also recommends users take the following measures to protect themselves from social engineering attacks:
- Do not click web links or open unsolicited attachments in email messages.
- Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams.
- 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.