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CVE-2021-1723: ASP.NET Core and Visual Studio Denial of Service Vulnerability

May 24, 2022 (updated October 9, 2024)

A denial-of-service vulnerability exists in the way Kestrel parses HTTP/2 requests. The security update addresses the vulnerability by fixing the way the Kestrel parses HTTP/2 requests. Users are advised to upgrade.

References

  • github.com/advisories/GHSA-242j-2gm6-5rwx
  • github.com/dotnet/announcements/issues/170
  • lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3L27CGRVEWUPELNJOGTCW6GLEDBECB4B
  • lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RRXHERXW4KR5WCP76UDW5PC7GX3YQLUW
  • msrc.microsoft.com/update-guide/vulnerability/CVE-2021-1723
  • nvd.nist.gov/vuln/detail/CVE-2021-1723

Code Behaviors & Features

Detect and mitigate CVE-2021-1723 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →

Affected versions

All versions starting from 3.1.0 before 3.1.11, all versions starting from 5.0.0 before 5.0.2

Fixed versions

  • 3.1.11
  • 5.0.2

Solution

Upgrade to versions 3.1.11, 5.0.2 or above.

Impact 7.5 HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Learn more about CVSS

Source file

nuget/Microsoft.AspNetCore.App.Runtime.linux-arm/CVE-2021-1723.yml

Spotted a mistake? Edit the file on GitLab.

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