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PatchSiren cyber security CVE debrief

CVE-2024-21319 Siemens CVE debrief

CVE-2024-21319 is a Siemens SIDIS Prime vulnerability described by CISA as a Microsoft Identity denial-of-service issue. The published CVSS vector indicates a network-reachable attack that requires high privileges, no user interaction, and can impact availability. Siemens’ remediation guidance is to update SIDIS Prime to V4.0.700 or later.

Vendor
Siemens
Product
SIDIS Prime
CVSS
MEDIUM 6.8
CISA KEV
Not listed in stored evidence
Original CVE published
2025-04-08
Original CVE updated
2025-05-06
Advisory published
2025-04-08
Advisory updated
2025-05-06

Who should care

Organizations that operate Siemens SIDIS Prime, especially administrators responsible for patching, identity integration, and service availability in operational or industrial environments.

Technical summary

The source advisory characterizes the issue as a Microsoft Identity denial-of-service vulnerability in Siemens SIDIS Prime. The CVSS 3.1 vector is AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H, indicating a remotely reachable condition with low attack complexity but requiring high privileges. The primary impact is availability; confidentiality and integrity are not scored in the supplied vector. Siemens lists a fixed version of V4.0.700 or later.

Defensive priority

Medium. The issue can disrupt availability, but the need for high privileges lowers exposure compared with unauthenticated network flaws. Prioritize if SIDIS Prime is business-critical or exposed to larger administrative trust zones.

Recommended defensive actions

  • Update Siemens SIDIS Prime to V4.0.700 or later.
  • Confirm which SIDIS Prime instances are in use and map them to the affected product entry in the Siemens advisory.
  • Restrict and review privileged access paths that could reach identity-related administrative functions.
  • Monitor service availability and alert on unexpected identity or authentication failures.
  • Use CISA and Siemens advisory references to validate remediation and deployment planning.

Evidence notes

This debrief is based on the supplied CISA CSAF advisory data for ICSA-25-100-02 and its referenced Siemens advisory materials. The corpus identifies Siemens as the vendor, SIDIS Prime as the affected product, a Microsoft Identity denial-of-service condition, and a vendor fix of V4.0.700 or later. No exploit details, affected version range, or additional technical mechanism were provided in the supplied source corpus.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-21319 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-21319

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

  • CVE-2024-21319 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-21319

    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/2025/icsa-25-100-02.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-277137.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-277137.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-25-100-02

    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/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

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.