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CVE-2023-36799 Siemens CVE debrief

CVE-2023-36799 is a denial-of-service vulnerability affecting .NET Core and Visual Studio, with impact extended to Siemens ST7 ScadaConnect (6NH7997-5DA10-0AA0) as identified in CISA advisory ICSA-24-165-04 published June 11, 2024. The vulnerability carries a CVSS 3.1 score of 6.5 (MEDIUM severity) with vector AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H, indicating network-accessible attack vector, low attack complexity, no privileges required, user interaction required, and high availability impact. The underlying issue stems from .NET Core and Visual Studio components used within the Siemens product. Siemens has provided a vendor fix requiring update to version 1.1 or later. This CVE is not listed in CISA's Known Exploited Vulnerabilities catalog.

Vendor
Siemens
Product
ST7 ScadaConnect (6NH7997-5DA10-0AA0)
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2024-06-11
Original CVE updated
2024-06-11
Advisory published
2024-06-11
Advisory updated
2024-06-11

Who should care

OT security teams operating Siemens ST7 ScadaConnect systems, industrial control system administrators, and organizations with .NET Core dependencies in critical infrastructure environments.

Technical summary

The vulnerability exists in .NET Core and Visual Studio components integrated into Siemens ST7 ScadaConnect. Attackers can trigger denial of service conditions remotely with user interaction. The CVSS 3.1 score of 6.5 reflects high availability impact with network accessibility. Siemens remediation requires updating affected products to version 1.1 or later.

Defensive priority

medium

Recommended defensive actions

  • Update Siemens ST7 ScadaConnect to version 1.1 or later per vendor guidance
  • Review .NET Core and Visual Studio runtime dependencies in OT environments for additional exposure
  • Apply network segmentation for SCADA systems per CISA ICS recommended practices
  • Monitor for anomalous network traffic targeting .NET Core applications
  • Validate update deployment through Siemens Industry Support portal

Evidence notes

CVE published and modified 2024-06-11 per source metadata. CISA CSAF advisory ICSA-24-165-04 published same date. Siemens SSA-341067 cross-referenced as primary vendor advisory. CVSS vector and remediation details sourced from CISA CSAF product tree and remediation sections.

Official resources

2024-06-11