Delta Industrial Automation DOPSoft (Update A)

1. EXECUTIVE SUMMARY

• CVSS v3 7.8 *ATTENTION: Low skill level to exploit
• Vendor: Delta Electronics
• Equipment: Delta Industrial Automation DOPSoft
• Vulnerabilities: Out-of-bounds Read, Heap-based Buffer Overflow

2. UPDATE INFORMATION

This updated advisory is a follow-up to the original advisory titled ICSA-20-182-01 Delta Industrial Automation DOPSoft that was published June 30, 2020, on the ICS webpage on us-cert.gov.

3. RISK EVALUATION

Successful exploitation of these vulnerabilities could allow an attacker to read/modify information, execute arbitrary code, and/or crash the application.

4. TECHNICAL DETAILS

4.1 AFFECTED PRODUCTS

The following versions of DOPSoft, a Human Machine Interface (HMI) editing software, are affected:

• DOPSoft Version 4.00.08.15 and prior

4.2 VULNERABILITY OVERVIEW

4.2.1 OUT-OF-BOUNDS READ CWE-125

Multiple out-of-bounds read vulnerabilities may be exploited by processing specially crafted project files, which may allow an attacker to read information and/or crash the application.

CVE-2020-10597 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).

4.2.2 HEAP-BASED BUFFER OVERFLOW CWE-122

Opening a specially crafted project file may overflow the heap, which may allow remote code execution, disclosure/modification of information, or cause the application to crash.

CVE-2020-14482 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).

4.3 BACKGROUND

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

4.4 RESEARCHER

Natnael Samson (@NattiSamson), working with Trend Micro’s Zero Day Initiative, reported these vulnerabilities to CISA.

5. MITIGATIONS

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Delta recommends the following:

• Update to the latest version of DOPSoft v4.00.08.21
• Restrict interaction of the application with trusted files.

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CISA recommends users take the following measures to protect against 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.

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.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.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.