Delta Electronics DOPSoft (Update A)

1. EXECUTIVE SUMMARY

• CVSS v3 3.3
• ATTENTION: Low attack complexity
• Vendor: Delta Electronics
• Equipment: DOPSoft
• Vulnerability: Out-of-bounds Read

2. UPDATE INFORMATION

This updated advisory is a follow-up to the original advisory titled ICSA-22-244-01 Delta Electronics DOPSoft that was published September 01, 2022, on the ICS webpage on cisa.gov/ICS. 

3. RISK EVALUATION

Successful exploitation of this vulnerability could allow an attacker to gain sensitive information.

4. TECHNICAL DETAILS

4.1 AFFECTED PRODUCTS

The following versions of DOPSoft, a software supporting the DOP-100 series HMI screens, are affected:

• DOPSoft: All versions

4.2 VULNERABILITY OVERVIEW

4.2.1    OUT-OF-BOUNDS READ CWE-125

Two out-of-bounds read conditions may occur due to the affected product not properly sanitizing input while processing specific project files, which may allow unauthorized information disclosure. 

CVE-2022-2966 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).

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 this vulnerability to CISA.

5. MITIGATIONS

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Delta Electronics recommends users either update to DOPSoft v4.00.16 or later or migrate to DIAScreen in DIAStudio v1.1.2 or later. 

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Delta Electronics recommends users to migrate to DIAScreen in DIAStudio v1.1.2 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 at cisa.gov/ics. Several CISA products detailing cyber defense best 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 at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.

Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.

No known public exploits specifically target this vulnerability. This vulnerability is not exploitable remotely.

• Delta Electronics