ASP.NET Core Denial of Service Vulnerability
Withdrawn
This advisory was withdrawn on Oct 6, 2021
Package
Affected versions
< 3.1.16
>= 5.0.0, < 5.0.7
Patched versions
3.1.16
5.0.7
Description
Published by the National Vulnerability Database
Jun 8, 2021
Reviewed
Oct 5, 2021
Published to the GitHub Advisory Database
Oct 6, 2021
Withdrawn
Oct 6, 2021
Last updated
Feb 1, 2023
Withdrawn
This advisory was initially published and mapped incorrectly to nuget
Microsoft.NETCore.App.Ref. We later reanalyzed this advisory and found it does not have a direct mapping to a NuGet package. Thus we have withdrawn this advisory.The underlying ASP.NET Core Denial of Service Vulnerability and CVE-2021-31957 remain legitimate.
Description.
Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 5.0 and .NET Core 3.1. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.
A denial of service vulnerability exists when ASP.NET Core improperly handles client disconnect. An attacker who successfully exploited this vulnerability could cause a denial of service against an ASP.NET Core web application. The vulnerability can be exploited remotely, without authentication.
Patches
If you're using .NET 5.0, you should download and install Runtime 5.0.7 or SDK 5.0.204 (for Visual Studio 2019 v16.8) or SDK 5.0.301 (for Visual Studio 2019 16.10) from https://dotnet.microsoft.com/download/dotnet-core/5.0.
If you're using .NET Core 3.1, you should download and install Runtime 3.1.16 or SDK 3.1.116 (for Visual Studio 2019 v16.4) or 3.1.410 (for Visual Studio 2019 v16.5 or later) from https://dotnet.microsoft.com/download/dotnet-core/3.1.
Other Details
References