Delta Electronics CNCSoft

1. EXECUTIVE SUMMARY

• CVSS v3 7.8
• ATTENTION: Low attack complexity
• Vendor: Delta Electronics
• Equipment: CNCSoft
• Vulnerabilities: Stack-based Buffer Overflow, Out-of-bounds Read

2. RISK EVALUATION

Successful exploitation of these vulnerabilities could allow arbitrary code execution or information disclosure.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of CNCSoft, a software management platform, are affected:

• CNCSoft: All versions prior to 1.01.32

3.2 VULNERABILITY OVERVIEW

3.2.1     STACK-BASED BUFFER OVERFLOW CWE-121

The affected product does not properly sanitize input while processing a specific project file, allowing a possible stack-based buffer overflow condition.

CVE-2022-1405 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).

3.2.2    OUT-OF-BOUNDS READ CWE-125

The affected product does not properly sanitize input while processing a specific project file, allowing a possible out-of-bounds read condition.

CVE-2022-1404 has been assigned to this vulnerability. A CVSS v3 base score of 3.3 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N).

3.3 BACKGROUND

• CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
• COUNTRIES/AREAS DEPLOYED: Worldwide
• COMPANY HEADQUARTERS LOCATION: Taiwan

3.4 RESEARCHER

An anonymous researcher working with Trend Micro Zero Day Initiative reported these vulnerabilities to CISA.

4. MITIGATIONS

Delta Electronics has released an updated version of CNCSoft and recommends users update to v1.01.32 or later.

CISA recommends users take the following measures to protect themselves from social engineering attacks:

• Only use project files from trusted sources.
• 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.

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 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 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 these vulnerabilities. These vulnerabilities are not exploitable remotely.

• Delta Electronics