CVE-2019-0564: Denial of service in ASP.NET Core

CVE-2019-0564 · Severity: low · CVSS 3 · Published 2022-05-14

Denial of service in ASP.NET Core

Technologies: Microsoft.AspNetCore.All (NuGet), Microsoft.AspNetCore.App (NuGet), Microsoft.AspNetCore.Server.Kestrel.Core (NuGet), Microsoft.NETCore.App (NuGet). Vendors: NuGet.

Quick answers

Is CVE-2019-0564 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2019-0564 being exploited in the wild.
How severe is CVE-2019-0564?
Low severity, with a CVSS score of 3, published 14 May 2022.
Which products and versions are affected?
Microsoft.AspNetCore.All (NuGet) ECOSYSTEM:introduced=2.2.0,fixed=2.2.1; Microsoft.AspNetCore.App (NuGet) ECOSYSTEM:introduced=2.2.0,fixed=2.2.1; Microsoft.AspNetCore.Server.Kestrel.Core (NuGet) ECOSYSTEM:introduced=2.1.0,fixed=2.1.7; Microsoft.AspNetCore.WebSockets (NuGet) ECOSYSTEM:introduced=2.2.0,fixed=2.2.1; and 2 more.
Is there a fix for CVE-2019-0564?
Yes. Microsoft.AspNetCore.All (NuGet): upgrade to 2.2.1 or later; Microsoft.AspNetCore.App (NuGet): upgrade to 2.2.1 or later; Microsoft.AspNetCore.Server.Kestrel.Core (NuGet): upgrade to 2.1.7 or later; Microsoft.AspNetCore.WebSockets (NuGet): upgrade to 2.2.1 or later; Microsoft.NETCore.App (NuGet): upgrade to 2.2.1 or later; System.Net.WebSockets.WebSocketProtocol (NuGet): upgrade to 4.5.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2019-0564?
Check whether you run Microsoft.AspNetCore.All (NuGet), Microsoft.AspNetCore.App (NuGet), Microsoft.AspNetCore.Server.Kestrel.Core (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.All (NuGet): upgrade to 2.2.1 or later
    dotnet add package Microsoft.AspNetCore.All --version 2.2.1
  • Microsoft.AspNetCore.App (NuGet): upgrade to 2.2.1 or later
    dotnet add package Microsoft.AspNetCore.App --version 2.2.1
  • Microsoft.AspNetCore.Server.Kestrel.Core (NuGet): upgrade to 2.1.7 or later
    dotnet add package Microsoft.AspNetCore.Server.Kestrel.Core --version 2.1.7
  • Microsoft.AspNetCore.WebSockets (NuGet): upgrade to 2.2.1 or later
    dotnet add package Microsoft.AspNetCore.WebSockets --version 2.2.1
  • Microsoft.NETCore.App (NuGet): upgrade to 2.2.1 or later
    dotnet add package Microsoft.NETCore.App --version 2.2.1
  • System.Net.WebSockets.WebSocketProtocol (NuGet): upgrade to 4.5.3 or later
    dotnet add package System.Net.WebSockets.WebSocketProtocol --version 4.5.3

Affected products

  • Microsoft.AspNetCore.All (NuGet) ECOSYSTEM:introduced=2.2.0,fixed=2.2.1
  • Microsoft.AspNetCore.App (NuGet) ECOSYSTEM:introduced=2.2.0,fixed=2.2.1
  • Microsoft.AspNetCore.Server.Kestrel.Core (NuGet) ECOSYSTEM:introduced=2.1.0,fixed=2.1.7
  • Microsoft.AspNetCore.WebSockets (NuGet) ECOSYSTEM:introduced=2.2.0,fixed=2.2.1
  • Microsoft.NETCore.App (NuGet) ECOSYSTEM:introduced=2.2.0,fixed=2.2.1
  • System.Net.WebSockets.WebSocketProtocol (NuGet) ECOSYSTEM:introduced=4.5.0,fixed=4.5.3

Identifiers

  • CVE-2019-0564
  • GHSA-6px8-22w5-w334

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