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PatchSiren cyber security CVE debrief

CVE-2023-38180 Microsoft CVE debrief

CVE-2023-38180 is a Microsoft .NET Core and Visual Studio denial-of-service vulnerability. CISA listed it in the Known Exploited Vulnerabilities catalog on the same day it was published in the supplied corpus, so it should be treated as a high-priority remediation item.

Vendor
Microsoft
Product
.NET Core and Visual Studio
CVSS
HIGH 7.5
CISA KEV
Listed
Original CVE published
2023-08-09
Original CVE updated
2023-08-09
Advisory published
2023-08-09
Advisory updated
2023-08-09

Who should care

Organizations running Microsoft .NET Core or Visual Studio should pay attention, especially if those components are used on developer workstations, build servers, CI/CD runners, or other shared environments. Teams responsible for patching, endpoint management, and vulnerability response should prioritize this CVE because CISA lists it as known exploited.

Technical summary

The supplied sources identify a denial-of-service vulnerability affecting Microsoft .NET Core and Visual Studio. The corpus does not provide exploit mechanics, affected versions, or a CVSS score. CISA added the CVE to its KEV catalog on 2023-08-09, and the KEV entry directs defenders to apply vendor mitigations or discontinue use if mitigations are unavailable.

Defensive priority

High

Recommended defensive actions

  • Apply Microsoft-recommended mitigations or updates referenced by the vendor advisory.
  • If mitigations are unavailable, reduce exposure or discontinue use of affected installations per CISA guidance.
  • Prioritize remediation for internet-facing, shared, or build-related environments first.
  • Inventory endpoints, build agents, and CI/CD runners for .NET Core and Visual Studio usage.
  • Track the KEV due date of 2023-08-30 and verify remediation is complete before that deadline.

Evidence notes

The supplied corpus shows CVE published and modified on 2023-08-09, and CISA KEV dateAdded is also 2023-08-09 with dueDate 2023-08-30. CISA’s required action in the source item is: apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. The source item notes reference the Microsoft update guide and the NVD entry, but no exploit details or CVSS score are provided in the corpus.

Sources and references

Verified primary and authoritative sources

  • CVE-2023-38180 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2023-38180

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

  • CVE-2023-38180 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2023-38180

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

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

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.