CVE-2024-21386: Microsoft Security Advisory : .NET Denial of Service Vulnerability

Quick answers

Is CVE-2024-21386 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2024-21386 being exploited in the wild.

How severe is CVE-2024-21386?

Low severity, with a CVSS score of 3.1, published 13 February 2024.

Which products and versions are affected?

Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet) ECOSYSTEM:introduced=0,fixed=6.0.27; Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet) ECOSYSTEM:introduced=0,fixed=6.0.27; Microsoft.AspNetCore.App.Runtime.linux-musl-arm (NuGet) ECOSYSTEM:introduced=0,fixed=6.0.27; Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet) ECOSYSTEM:introduced=0,fixed=6.0.27; and 8 more.

Is there a fix for CVE-2024-21386?

Yes. Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet): upgrade to 6.0.27 or later; Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet): upgrade to 6.0.27 or later; Microsoft.AspNetCore.App.Runtime.linux-musl-arm (NuGet): upgrade to 6.0.27 or later; Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet): upgrade to 6.0.27 or later; Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet): upgrade to 6.0.27 or later; Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet): upgrade to 6.0.27 or later; Microsoft.AspNetCore.App.Runtime.osx-arm64 (NuGet): upgrade to 6.0.27 or later; Microsoft.AspNetCore.App.Runtime.osx-x64 (NuGet): upgrade to 6.0.27 or later; Microsoft.AspNetCore.App.Runtime.win-arm (NuGet): upgrade to 6.0.27 or later; Microsoft.AspNetCore.App.Runtime.win-arm64 (NuGet): upgrade to 6.0.27 or later; Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet): upgrade to 6.0.27 or later; Microsoft.AspNetCore.App.Runtime.win-x86 (NuGet): upgrade to 6.0.27 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Am I affected by CVE-2024-21386?

Check whether you run Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet), Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet), Microsoft.AspNetCore.App.Runtime.linux-musl-arm (NuGet) or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

• Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet): upgrade to 6.0.27 or later

  dotnet add package Microsoft.AspNetCore.App.Runtime.linux-arm --version 6.0.27

• Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet): upgrade to 6.0.27 or later

  dotnet add package Microsoft.AspNetCore.App.Runtime.linux-arm64 --version 6.0.27

• Microsoft.AspNetCore.App.Runtime.linux-musl-arm (NuGet): upgrade to 6.0.27 or later

  dotnet add package Microsoft.AspNetCore.App.Runtime.linux-musl-arm --version 6.0.27

• Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet): upgrade to 6.0.27 or later

  dotnet add package Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 --version 6.0.27

• Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet): upgrade to 6.0.27 or later

  dotnet add package Microsoft.AspNetCore.App.Runtime.linux-musl-x64 --version 6.0.27

• Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet): upgrade to 6.0.27 or later

  dotnet add package Microsoft.AspNetCore.App.Runtime.linux-x64 --version 6.0.27

• Microsoft.AspNetCore.App.Runtime.osx-arm64 (NuGet): upgrade to 6.0.27 or later

  dotnet add package Microsoft.AspNetCore.App.Runtime.osx-arm64 --version 6.0.27

• Microsoft.AspNetCore.App.Runtime.osx-x64 (NuGet): upgrade to 6.0.27 or later

  dotnet add package Microsoft.AspNetCore.App.Runtime.osx-x64 --version 6.0.27

• Microsoft.AspNetCore.App.Runtime.win-arm (NuGet): upgrade to 6.0.27 or later

  dotnet add package Microsoft.AspNetCore.App.Runtime.win-arm --version 6.0.27

• Microsoft.AspNetCore.App.Runtime.win-arm64 (NuGet): upgrade to 6.0.27 or later

  dotnet add package Microsoft.AspNetCore.App.Runtime.win-arm64 --version 6.0.27

• Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet): upgrade to 6.0.27 or later

  dotnet add package Microsoft.AspNetCore.App.Runtime.win-x64 --version 6.0.27

• Microsoft.AspNetCore.App.Runtime.win-x86 (NuGet): upgrade to 6.0.27 or later

  dotnet add package Microsoft.AspNetCore.App.Runtime.win-x86 --version 6.0.27

Affected products

• Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet) ECOSYSTEM:introduced=0,fixed=6.0.27
• Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet) ECOSYSTEM:introduced=0,fixed=6.0.27
• Microsoft.AspNetCore.App.Runtime.linux-musl-arm (NuGet) ECOSYSTEM:introduced=0,fixed=6.0.27
• Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet) ECOSYSTEM:introduced=0,fixed=6.0.27
• Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet) ECOSYSTEM:introduced=0,fixed=6.0.27
• Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet) ECOSYSTEM:introduced=0,fixed=6.0.27
• Microsoft.AspNetCore.App.Runtime.osx-arm64 (NuGet) ECOSYSTEM:introduced=0,fixed=6.0.27
• Microsoft.AspNetCore.App.Runtime.osx-x64 (NuGet) ECOSYSTEM:introduced=0,fixed=6.0.27
• Microsoft.AspNetCore.App.Runtime.win-arm (NuGet) ECOSYSTEM:introduced=0,fixed=6.0.27
• Microsoft.AspNetCore.App.Runtime.win-arm64 (NuGet) ECOSYSTEM:introduced=0,fixed=6.0.27
• Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet) ECOSYSTEM:introduced=0,fixed=6.0.27
• Microsoft.AspNetCore.App.Runtime.win-x86 (NuGet) ECOSYSTEM:introduced=0,fixed=6.0.27

Identifiers

• CVE-2024-21386
• GHSA-g74q-5xw3-j7q9