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CVE-2024-39605 Delta Electronics CVE debrief

CVE-2024-39605 is a stack-based buffer overflow vulnerability in Delta Electronics DIAScreen, an industrial control system HMI/SCADA software. The flaw exists in the BACnetParameter component and can be exploited when a valid user is tricked into opening a maliciously crafted file. Successful exploitation allows remote code execution with the privileges of the user running the application. The vulnerability was disclosed by CISA on November 7, 2024, with a CVSS 3.1 score of 7.8 (HIGH). Delta Electronics has released version 1.5.0 to address this issue. The attack requires local access (AV:L) and user interaction (UI:R), but no privileges (PR:N), making it a significant risk in environments where operators routinely open project files from external sources.

Vendor
Delta Electronics
Product
DIAScreen
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2024-11-07
Original CVE updated
2024-11-07
Advisory published
2024-11-07
Advisory updated
2024-11-07

Who should care

Industrial control system operators, OT security teams, manufacturing security engineers, SCADA/HMI administrators, and organizations using Delta Electronics DIAScreen for human-machine interface applications in critical infrastructure or manufacturing environments.

Technical summary

The vulnerability is a stack-based buffer overflow in the BACnetParameter parsing functionality of Delta Electronics DIAScreen. When processing a malformed project file, insufficient bounds checking allows attacker-controlled data to overwrite the stack, leading to arbitrary code execution. The attack vector requires social engineering to convince a user to open a malicious file, but once triggered, the code executes with the user's privileges. This is particularly concerning in operational technology environments where engineering workstations may have privileged access to control systems. The CVSS 3.1 vector AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H reflects local attack vector, low complexity, no privilege requirements, user interaction needed, and high impact across confidentiality, integrity, and availability.

Defensive priority

HIGH

Recommended defensive actions

  • Upgrade to DIAScreen v1.5.0 or later immediately on all engineering workstations and operator stations
  • Implement application whitelisting to prevent execution of unauthorized DIAScreen project files
  • Train operators and engineers on phishing and social engineering risks, emphasizing verification of file sources before opening
  • Deploy endpoint detection and response (EDR) solutions on systems running DIAScreen to detect anomalous process behavior
  • Restrict network access for engineering workstations to essential operational technology networks only
  • Establish a patch management process for industrial software with regular vendor security advisory monitoring

Evidence notes

Vulnerability disclosed via CISA ICS Advisory ICSA-24-312-02. Affected versions confirmed as DIAScreen prior to v1.5.0. Vendor fix released and publicly available. No known exploitation in the wild or KEV listing at time of disclosure.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-39605 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-39605

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2024-39605 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-39605

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2024/icsa-24-312-02.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-24-312-02

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/resources-tools/resources/ics-recommended-practices

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/topics/industrial-control-systems

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/ics/tips/ICS-TIP-12-146-01B

    Reference

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.