Ubuntu Security Notices
USN-6634-1

USN-6634-1: .NET vulnerabilities

Publication date

13 February 2024

Overview

Several security issues were fixed in .NET.

Releases

23.10 22.04 LTS

Packages

dotnet6 - dotNET CLI tools and runtime
dotnet7 - dotNET CLI tools and runtime
dotnet8 - dotNET CLI tools and runtime

Details

Brennan Conroy discovered that .NET with SignalR did not properly
handle malicious clients. An attacker could possibly use this issue
to cause a denial of service. (CVE-2024-21386)

Bahaa Naamneh discovered that .NET with OpenSSL support did not
properly parse X509 certificates. An attacker could possibly use
this issue to cause a denial of service. (CVE-2024-21404)

Brennan Conroy discovered that .NET with SignalR did not properly
handle malicious clients. An attacker could possibly use this issue
to cause a denial of service. (CVE-2024-21386)

Bahaa Naamneh discovered that .NET with OpenSSL support did not
properly parse X509 certificates. An attacker could possibly use
this issue to cause a denial of service. (CVE-2024-21404)

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release	Package Version
23.10 mantic	aspnetcore-runtime-6.0 – 6.0.127-0ubuntu1~23.10.1
	aspnetcore-runtime-7.0 – 7.0.116-0ubuntu1~23.10.1
	aspnetcore-runtime-8.0 – 8.0.2-0ubuntu1~23.10.1
	dotnet-host – 6.0.127-0ubuntu1~23.10.1
	dotnet-host-7.0 – 7.0.116-0ubuntu1~23.10.1
	dotnet-host-8.0 – 8.0.2-0ubuntu1~23.10.1
	dotnet-hostfxr-6.0 – 6.0.127-0ubuntu1~23.10.1
	dotnet-hostfxr-7.0 – 7.0.116-0ubuntu1~23.10.1
	dotnet-hostfxr-8.0 – 8.0.2-0ubuntu1~23.10.1
	dotnet-runtime-6.0 – 6.0.127-0ubuntu1~23.10.1
	dotnet-runtime-7.0 – 7.0.116-0ubuntu1~23.10.1
	dotnet-runtime-8.0 – 8.0.2-0ubuntu1~23.10.1
	dotnet-sdk-6.0 – 6.0.127-0ubuntu1~23.10.1
	dotnet-sdk-7.0 – 7.0.116-0ubuntu1~23.10.1
	dotnet-sdk-8.0 – 8.0.102-0ubuntu1~23.10.1
	dotnet6 – 6.0.127-0ubuntu1~23.10.1
	dotnet7 – 7.0.116-0ubuntu1~23.10.1
	dotnet8 – 8.0.102-8.0.2-0ubuntu1~23.10.1
22.04 jammy	aspnetcore-runtime-6.0 – 6.0.127-0ubuntu1~22.04.1
	aspnetcore-runtime-7.0 – 7.0.116-0ubuntu1~22.04.1
	aspnetcore-runtime-8.0 – 8.0.2-0ubuntu1~22.04.1
	dotnet-host – 6.0.127-0ubuntu1~22.04.1
	dotnet-host-7.0 – 7.0.116-0ubuntu1~22.04.1
	dotnet-host-8.0 – 8.0.2-0ubuntu1~22.04.1
	dotnet-hostfxr-6.0 – 6.0.127-0ubuntu1~22.04.1
	dotnet-hostfxr-7.0 – 7.0.116-0ubuntu1~22.04.1
	dotnet-hostfxr-8.0 – 8.0.2-0ubuntu1~22.04.1
	dotnet-runtime-6.0 – 6.0.127-0ubuntu1~22.04.1
	dotnet-runtime-7.0 – 7.0.116-0ubuntu1~22.04.1
	dotnet-runtime-8.0 – 8.0.2-0ubuntu1~22.04.1
	dotnet-sdk-6.0 – 6.0.127-0ubuntu1~22.04.1
	dotnet-sdk-7.0 – 7.0.116-0ubuntu1~22.04.1
	dotnet-sdk-8.0 – 8.0.102-0ubuntu1~22.04.1
	dotnet6 – 6.0.127-0ubuntu1~22.04.1
	dotnet7 – 7.0.116-0ubuntu1~22.04.1
	dotnet8 – 8.0.102-8.0.2-0ubuntu1~22.04.1

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Get Ubuntu Pro

USN-6634-1: .NET vulnerabilities

Packages

Details

Update instructions

Reduce your security exposure

References