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CVE-2023-5392 Honeywell CVE debrief

CVE-2023-5392 is a HIGH severity information disclosure vulnerability affecting multiple Honeywell industrial control systems, including Experion PKS, Experion LX, PlantCruise by Experion, Safety Manager, and Safety Manager SC. Published on April 25, 2024, this vulnerability allows an attacker to extract more information from memory over the network than required when targeting the Experion controller, ControlEdge PLC, Safety Manager, or SMSC S300. The CVSS 3.1 score of 7.5 reflects network-based attack vector with low complexity, no privileges required, and high confidentiality impact. Honeywell has released patches for affected versions across all product lines, with specific upgrade paths available through their security notice.

Vendor
Honeywell
Product
Experion PKS
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2024-04-25
Original CVE updated
2024-04-25
Advisory published
2024-04-25
Advisory updated
2024-04-25

Who should care

Organizations operating Honeywell Experion PKS, Experion LX, PlantCruise by Experion, Safety Manager, or Safety Manager SC systems in industrial environments, particularly those in critical infrastructure sectors including energy, manufacturing, chemical processing, and building automation where these control systems are deployed.

Technical summary

CVE-2023-5392 is an information disclosure vulnerability in Honeywell's industrial control system product suite. Successful exploitation enables an attacker to extract excessive memory information over the network from targeted controllers including the Experion controller, ControlEdge PLC, Safety Manager, and SMSC S300. The vulnerability is remotely exploitable without authentication (AV:N/AC:L/PR:N/UI:N), resulting in high confidentiality impact with no integrity or availability impact. Affected versions span multiple release trains: Experion PKS versions prior to R510.2_HF14, R511.5_TCU4_HF4, R520.1_TCU5, and R520.2_TCU4_HF2; Experion LX versions prior to R511.5_TCU4_HF4, R520.1_TCU5, and R520.2_TCU4_HF2; PlantCruise by Experion versions prior to R511.5_TCU4_HF4, R520.1_TCU5, and R520.2_TCU4_HF2; Safety Manager R15x and R16x through R162.10; and Safety Manager SC versions R210.X, R211.1, R211.2, and R212.1. Honeywell has issued patches and directs customers to Security Notice SN2024 for remediation guidance.

Defensive priority

HIGH

Recommended defensive actions

  • Upgrade affected Honeywell systems to patched versions referenced in Honeywell Security Notice SN2024
  • Apply network segmentation to isolate affected industrial control systems from untrusted networks
  • Monitor network traffic for anomalous connections to Experion controllers, ControlEdge PLCs, Safety Managers, and SMSC S300 devices
  • Review and implement CISA ICS recommended practices for defense-in-depth strategies
  • Validate that memory access controls are properly configured on affected devices after patching

Evidence notes

Vulnerability allows memory information extraction over network from Experion controller, ControlEdge PLC, Safety Manager, or SMSC S300. Affects 16 specific product versions across Experion PKS, Experion LX, PlantCruise by Experion, Safety Manager, and Safety Manager SC product lines.

Sources and references

Verified primary and authoritative sources

  • CVE-2023-5392 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2023-5392

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

  • CVE-2023-5392 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2023-5392

    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-24-116-04.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-24-116-04

    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://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://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.