Delta Electronics CNCSoft-G2
1. EXECUTIVE SUMMARY
- CVSS v4 8.4
- ATTENTION: low attack complexity
- Vendor: Delta Electronics
- Equipment: CNCSoft-G2
- Vulnerabilities: Stack-based Buffer Overflow, Out-of-bounds Write, Heap-Based Buffer Overflow, Out-of-bounds Read, Use of Uninitialized Variable
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow an attacker to execute code remotely.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of Delta Electronics CNCSoft-G2, a Human-Machine Interface (HMI) software, are affected:
- CNCSoft-G2: Version 2.1.0.10
3.2 Vulnerability Overview
3.2.1 Stack-based Buffer Overflow CWE-121
Delta Electronics CNCSoft-G2 lacks proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can manipulate an insider to visit a malicious page or file to leverage this vulnerability to execute code in the context of the current process.
CVE-2024-47962 has been assigned to this vulnerability. A CVSS v3.1 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).
A CVSS v4 score has also been calculated for CVE-2024-47962. A base score of 8.4 has been calculated; the CVSS vector string is (CVSS4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N).
3.2.2 Out-of-bounds Write CWE-787
Delta Electronics CNCSoft-G2 lacks proper validation of user-supplied data, which can result in a write past the end of an allocated object. An attacker can manipulate users to visit a malicious page or file to leverage this vulnerability to execute code in the context of the current process.
CVE-2024-47963 has been assigned to this vulnerability. A CVSS v3.1 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).
A CVSS v4 score has also been calculated for CVE-2024-47963. A base score of 8.4 has been calculated; the CVSS vector string is (CVSS4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N).
3.2.3 Heap-Based Buffer Overflow CWE-122
Delta Electronics CNCSoft-G2 lacks proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. An attacker can manipulate users to visit a malicious page or file to leverage this vulnerability to execute code in the context of the current process.
CVE-2024-47964 has been assigned to this vulnerability. A CVSS v3.1 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).
A CVSS v4 score has also been calculated for CVE-2024-47964. A base score of 8.4 has been calculated; the CVSS vector string is (CVSS4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N).
3.2.4 Out-of-bounds Read CWE-125
Delta Electronics CNCSoft-G2 lacks proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can manipulate users to visit a malicious page or file to leverage this vulnerability to execute code in the context of the current process.
CVE-2024-47965 has been assigned to this vulnerability. A CVSS v3.1 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).
A CVSS v4 score has also been calculated for CVE-2024-47965. A base score of 8.4 has been calculated; the CVSS vector string is (CVSS4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N).
3.2.5 Use of Uninitialized Variable CWE-457
Delta Electronics CNCSoft-G2 lacks proper initialization of memory prior to accessing it. An attacker can manipulate users to visit a malicious page or file to leverage this vulnerability to execute code in the context of the current process.
CVE-2024-47966 has been assigned to this vulnerability. A CVSS v3.1 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).
A CVSS v4 score has also been calculated for CVE-2024-47966. A base score of 8.4 has been calculated; the CVSS vector string is (CVSS4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N).
3.3 BACKGROUND
- CRITICAL INFRASTRUCTURE SECTORS: Energy, Critical Manufacturing
- COUNTRIES/AREAS DEPLOYED: Worldwide
- COMPANY HEADQUARTERS LOCATION: Taiwan
3.4 RESEARCHER
Bobby Gould, Fritz Sands, and Natnael Samson working with Trend Micro Zero Day Initiative reported these vulnerabilities to CISA.
4. MITIGATIONS
Delta Electronics recommends users update to CNCSoft-G2 v2.1.0.16 or later.
CISA recommends users take the following measures to protect themselves from social engineering attacks:
- Do not click web links or open attachments in unsolicited 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/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.
CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.
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 exploitation specifically targeting these vulnerabilities has been reported to CISA at this time. These vulnerabilities are not exploitable remotely.
5. UPDATE HISTORY
- October 10, 2024: Initial Publication
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Vendor
- Delta Electronics