[USN-6438-1] .NET vulnerabilities

Ian Constantin ian.constantin at canonical.com
Thu Oct 19 18:11:18 UTC 2023

Ubuntu Security Notice USN-6438-1
October 19, 2023

dotnet6, dotnet7 vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 23.10


Several security issues were fixed in dotnet6, dotnet7.

Software Description:
- dotnet6: dotNET CLI tools and runtime
- dotnet7: dotNET CLI tools and runtime


Kevin Jones discovered that .NET did not properly process certain
X.509 certificates. An attacker could possibly use this issue to
cause a denial of service. (CVE-2023-36799)

It was discovered that the .NET Kestrel web server did not properly
handle HTTP/2 requests. A remote attacker could possibly use this
issue to cause a denial of service. (CVE-2023-44487)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 23.10:
    aspnetcore-runtime-6.0    6.0.123-0ubuntu1
    aspnetcore-runtime-7.0    7.0.112-0ubuntu1
    dotnet-host                       6.0.123-0ubuntu1
    dotnet-host-7.0                 7.0.112-0ubuntu1
    dotnet-hostfxr-6.0             6.0.123-0ubuntu1
    dotnet-hostfxr-7.0             7.0.112-0ubuntu1
    dotnet-runtime-6.0           6.0.123-0ubuntu1
    dotnet-runtime-7.0           7.0.112-0ubuntu1
    dotnet-sdk-6.0                  6.0.123-0ubuntu1
    dotnet-sdk-7.0                  7.0.112-0ubuntu1
    dotnet6                             6.0.123-0ubuntu1
    dotnet7                             7.0.112-0ubuntu1

In general, a standard system update will make all the necessary changes.

    CVE-2023-36799, CVE-2023-44487

Package Information:

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