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==========================================================================
Ubuntu Security Notice USN-6427-1
October 10, 2023
dotnet6, dotnet7 vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 23.04
- Ubuntu 22.04 LTS
Summary:
.NET could be made to crash if it received specially crafted network
traffic.
Software Description:
- dotnet6: dotNET CLI tools and runtime
- dotnet7: dotNET CLI tools and runtime
Details:
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.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 23.04:
aspnetcore-runtime-6.0 6.0.123-0ubuntu1~23.04.1
aspnetcore-runtime-7.0 7.0.112-0ubuntu1~23.04.1
dotnet-host 6.0.123-0ubuntu1~23.04.1
dotnet-host-7.0 7.0.112-0ubuntu1~23.04.1
dotnet-hostfxr-6.0 6.0.123-0ubuntu1~23.04.1
dotnet-hostfxr-7.0 7.0.112-0ubuntu1~23.04.1
dotnet-runtime-6.0 6.0.123-0ubuntu1~23.04.1
dotnet-runtime-7.0 7.0.112-0ubuntu1~23.04.1
dotnet-sdk-6.0 6.0.123-0ubuntu1~23.04.1
dotnet-sdk-7.0 7.0.112-0ubuntu1~23.04.1
dotnet6 6.0.123-0ubuntu1~23.04.1
dotnet7 7.0.112-0ubuntu1~23.04.1
Ubuntu 22.04 LTS:
aspnetcore-runtime-6.0 6.0.123-0ubuntu1~22.04.1
aspnetcore-runtime-7.0 7.0.112-0ubuntu1~22.04.1
dotnet-host 6.0.123-0ubuntu1~22.04.1
dotnet-host-7.0 7.0.112-0ubuntu1~22.04.1
dotnet-hostfxr-6.0 6.0.123-0ubuntu1~22.04.1
dotnet-hostfxr-7.0 7.0.112-0ubuntu1~22.04.1
dotnet-runtime-6.0 6.0.123-0ubuntu1~22.04.1
dotnet-runtime-7.0 7.0.112-0ubuntu1~22.04.1
dotnet-sdk-6.0 6.0.123-0ubuntu1~22.04.1
dotnet-sdk-7.0 7.0.112-0ubuntu1~22.04.1
dotnet6 6.0.123-0ubuntu1~22.04.1
dotnet7 7.0.112-0ubuntu1~22.04.1
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-6427-1
CVE-2023-44487
Package Information:
https://launchpad.net/ubuntu/+source/dotnet6/6.0.123-0ubuntu1~23.04.1
https://launchpad.net/ubuntu/+source/dotnet7/7.0.112-0ubuntu1~23.04.1
https://launchpad.net/ubuntu/+source/dotnet6/6.0.123-0ubuntu1~22.04.1
https://launchpad.net/ubuntu/+source/dotnet7/7.0.112-0ubuntu1~22.04.1
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