CVE-2022-21986: .NET Denial of Service Vulnerability

Quick answers

Is CVE-2022-21986 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2022-21986 being exploited in the wild.

How severe is CVE-2022-21986?

Low severity, with a CVSS score of 3.1, published 21 October 2022.

Which products and versions are affected?

Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet) ECOSYSTEM:introduced=5.0.0,fixed=5.0.14; Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet) ECOSYSTEM:introduced=5.0.0,fixed=5.0.14; Microsoft.AspNetCore.App.Runtime.linux-musl-arm (NuGet) ECOSYSTEM:introduced=5.0.0,fixed=5.0.14; Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet) ECOSYSTEM:introduced=5.0.0,fixed=5.0.14; and 8 more.

Is there a fix for CVE-2022-21986?

Yes. Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet): upgrade to 5.0.14 or later; Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet): upgrade to 5.0.14 or later; Microsoft.AspNetCore.App.Runtime.linux-musl-arm (NuGet): upgrade to 5.0.14 or later; Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet): upgrade to 5.0.14 or later; Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet): upgrade to 5.0.14 or later; Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet): upgrade to 5.0.14 or later; Microsoft.AspNetCore.App.Runtime.osx-arm64 (NuGet): upgrade to 6.0.2 or later; Microsoft.AspNetCore.App.Runtime.osx-x64 (NuGet): upgrade to 5.0.14 or later; Microsoft.AspNetCore.App.Runtime.win-arm (NuGet): upgrade to 5.0.14 or later; Microsoft.AspNetCore.App.Runtime.win-arm64 (NuGet): upgrade to 5.0.14 or later; Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet): upgrade to 5.0.14 or later; Microsoft.AspNetCore.App.Runtime.win-x86 (NuGet): upgrade to 5.0.14 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Am I affected by CVE-2022-21986?

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 5.0.14 or later

  dotnet add package Microsoft.AspNetCore.App.Runtime.linux-arm --version 5.0.14

• Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet): upgrade to 5.0.14 or later

  dotnet add package Microsoft.AspNetCore.App.Runtime.linux-arm64 --version 5.0.14

• Microsoft.AspNetCore.App.Runtime.linux-musl-arm (NuGet): upgrade to 5.0.14 or later

  dotnet add package Microsoft.AspNetCore.App.Runtime.linux-musl-arm --version 5.0.14

• Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet): upgrade to 5.0.14 or later

  dotnet add package Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 --version 5.0.14

• Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet): upgrade to 5.0.14 or later

  dotnet add package Microsoft.AspNetCore.App.Runtime.linux-musl-x64 --version 5.0.14

• Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet): upgrade to 5.0.14 or later

  dotnet add package Microsoft.AspNetCore.App.Runtime.linux-x64 --version 5.0.14

• Microsoft.AspNetCore.App.Runtime.osx-arm64 (NuGet): upgrade to 6.0.2 or later

  dotnet add package Microsoft.AspNetCore.App.Runtime.osx-arm64 --version 6.0.2

• Microsoft.AspNetCore.App.Runtime.osx-x64 (NuGet): upgrade to 5.0.14 or later

  dotnet add package Microsoft.AspNetCore.App.Runtime.osx-x64 --version 5.0.14

• Microsoft.AspNetCore.App.Runtime.win-arm (NuGet): upgrade to 5.0.14 or later

  dotnet add package Microsoft.AspNetCore.App.Runtime.win-arm --version 5.0.14

• Microsoft.AspNetCore.App.Runtime.win-arm64 (NuGet): upgrade to 5.0.14 or later

  dotnet add package Microsoft.AspNetCore.App.Runtime.win-arm64 --version 5.0.14

• Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet): upgrade to 5.0.14 or later

  dotnet add package Microsoft.AspNetCore.App.Runtime.win-x64 --version 5.0.14

• Microsoft.AspNetCore.App.Runtime.win-x86 (NuGet): upgrade to 5.0.14 or later

  dotnet add package Microsoft.AspNetCore.App.Runtime.win-x86 --version 5.0.14

Affected products

• Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet) ECOSYSTEM:introduced=5.0.0,fixed=5.0.14
• Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet) ECOSYSTEM:introduced=5.0.0,fixed=5.0.14
• Microsoft.AspNetCore.App.Runtime.linux-musl-arm (NuGet) ECOSYSTEM:introduced=5.0.0,fixed=5.0.14
• Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet) ECOSYSTEM:introduced=5.0.0,fixed=5.0.14
• Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet) ECOSYSTEM:introduced=5.0.0,fixed=5.0.14
• Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet) ECOSYSTEM:introduced=5.0.0,fixed=5.0.14
• Microsoft.AspNetCore.App.Runtime.osx-arm64 (NuGet) ECOSYSTEM:introduced=6.0.0,fixed=6.0.2
• Microsoft.AspNetCore.App.Runtime.osx-x64 (NuGet) ECOSYSTEM:introduced=5.0.0,fixed=5.0.14
• Microsoft.AspNetCore.App.Runtime.win-arm (NuGet) ECOSYSTEM:introduced=5.0.0,fixed=5.0.14
• Microsoft.AspNetCore.App.Runtime.win-arm64 (NuGet) ECOSYSTEM:introduced=5.0.0,fixed=5.0.14
• Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet) ECOSYSTEM:introduced=5.0.0,fixed=5.0.14
• Microsoft.AspNetCore.App.Runtime.win-x86 (NuGet) ECOSYSTEM:introduced=5.0.0,fixed=5.0.14

Identifiers

• CVE-2022-21986
• GHSA-x459-p2rx-f8ff