Advisory Published

USN-6634-1: .NET vulnerabilities

First published: Tue Feb 13 2024(Updated: )

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)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/aspnetcore-runtime-6.0<6.0.127-0ubuntu1~23.10.1
6.0.127-0ubuntu1~23.10.1
Ubuntu=23.10
All of
ubuntu/aspnetcore-runtime-7.0<7.0.116-0ubuntu1~23.10.1
7.0.116-0ubuntu1~23.10.1
Ubuntu=23.10
All of
ubuntu/aspnetcore-runtime-8.0<8.0.2-0ubuntu1~23.10.1
8.0.2-0ubuntu1~23.10.1
Ubuntu=23.10
All of
ubuntu/dotnet-host<6.0.127-0ubuntu1~23.10.1
6.0.127-0ubuntu1~23.10.1
Ubuntu=23.10
All of
ubuntu/dotnet-host-7.0<7.0.116-0ubuntu1~23.10.1
7.0.116-0ubuntu1~23.10.1
Ubuntu=23.10
All of
ubuntu/dotnet-host-8.0<8.0.2-0ubuntu1~23.10.1
8.0.2-0ubuntu1~23.10.1
Ubuntu=23.10
All of
ubuntu/dotnet-hostfxr-6.0<6.0.127-0ubuntu1~23.10.1
6.0.127-0ubuntu1~23.10.1
Ubuntu=23.10
All of
ubuntu/dotnet-hostfxr-7.0<7.0.116-0ubuntu1~23.10.1
7.0.116-0ubuntu1~23.10.1
Ubuntu=23.10
All of
ubuntu/dotnet-hostfxr-8.0<8.0.2-0ubuntu1~23.10.1
8.0.2-0ubuntu1~23.10.1
Ubuntu=23.10
All of
ubuntu/dotnet-runtime-6.0<6.0.127-0ubuntu1~23.10.1
6.0.127-0ubuntu1~23.10.1
Ubuntu=23.10
All of
ubuntu/dotnet-runtime-7.0<7.0.116-0ubuntu1~23.10.1
7.0.116-0ubuntu1~23.10.1
Ubuntu=23.10
All of
ubuntu/dotnet-runtime-8.0<8.0.2-0ubuntu1~23.10.1
8.0.2-0ubuntu1~23.10.1
Ubuntu=23.10
All of
ubuntu/dotnet-sdk-6.0<6.0.127-0ubuntu1~23.10.1
6.0.127-0ubuntu1~23.10.1
Ubuntu=23.10
All of
ubuntu/dotnet-sdk-7.0<7.0.116-0ubuntu1~23.10.1
7.0.116-0ubuntu1~23.10.1
Ubuntu=23.10
All of
ubuntu/dotnet-sdk-8.0<8.0.102-0ubuntu1~23.10.1
8.0.102-0ubuntu1~23.10.1
Ubuntu=23.10
All of
ubuntu/dotnet6<6.0.127-0ubuntu1~23.10.1
6.0.127-0ubuntu1~23.10.1
Ubuntu=23.10
All of
ubuntu/dotnet7<7.0.116-0ubuntu1~23.10.1
7.0.116-0ubuntu1~23.10.1
Ubuntu=23.10
All of
ubuntu/dotnet8<8.0.102-8.0.2-0ubuntu1~23.10.1
8.0.102-8.0.2-0ubuntu1~23.10.1
Ubuntu=23.10
All of
ubuntu/aspnetcore-runtime-6.0<6.0.127-0ubuntu1~22.04.1
6.0.127-0ubuntu1~22.04.1
Ubuntu=22.04
All of
ubuntu/aspnetcore-runtime-7.0<7.0.116-0ubuntu1~22.04.1
7.0.116-0ubuntu1~22.04.1
Ubuntu=22.04
All of
ubuntu/aspnetcore-runtime-8.0<8.0.2-0ubuntu1~22.04.1
8.0.2-0ubuntu1~22.04.1
Ubuntu=22.04
All of
ubuntu/dotnet-host<6.0.127-0ubuntu1~22.04.1
6.0.127-0ubuntu1~22.04.1
Ubuntu=22.04
All of
ubuntu/dotnet-host-7.0<7.0.116-0ubuntu1~22.04.1
7.0.116-0ubuntu1~22.04.1
Ubuntu=22.04
All of
ubuntu/dotnet-host-8.0<8.0.2-0ubuntu1~22.04.1
8.0.2-0ubuntu1~22.04.1
Ubuntu=22.04
All of
ubuntu/dotnet-hostfxr-6.0<6.0.127-0ubuntu1~22.04.1
6.0.127-0ubuntu1~22.04.1
Ubuntu=22.04
All of
ubuntu/dotnet-hostfxr-7.0<7.0.116-0ubuntu1~22.04.1
7.0.116-0ubuntu1~22.04.1
Ubuntu=22.04
All of
ubuntu/dotnet-hostfxr-8.0<8.0.2-0ubuntu1~22.04.1
8.0.2-0ubuntu1~22.04.1
Ubuntu=22.04
All of
ubuntu/dotnet-runtime-6.0<6.0.127-0ubuntu1~22.04.1
6.0.127-0ubuntu1~22.04.1
Ubuntu=22.04
All of
ubuntu/dotnet-runtime-7.0<7.0.116-0ubuntu1~22.04.1
7.0.116-0ubuntu1~22.04.1
Ubuntu=22.04
All of
ubuntu/dotnet-runtime-8.0<8.0.2-0ubuntu1~22.04.1
8.0.2-0ubuntu1~22.04.1
Ubuntu=22.04
All of
ubuntu/dotnet-sdk-6.0<6.0.127-0ubuntu1~22.04.1
6.0.127-0ubuntu1~22.04.1
Ubuntu=22.04
All of
ubuntu/dotnet-sdk-7.0<7.0.116-0ubuntu1~22.04.1
7.0.116-0ubuntu1~22.04.1
Ubuntu=22.04
All of
ubuntu/dotnet-sdk-8.0<8.0.102-0ubuntu1~22.04.1
8.0.102-0ubuntu1~22.04.1
Ubuntu=22.04
All of
ubuntu/dotnet6<6.0.127-0ubuntu1~22.04.1
6.0.127-0ubuntu1~22.04.1
Ubuntu=22.04
All of
ubuntu/dotnet7<7.0.116-0ubuntu1~22.04.1
7.0.116-0ubuntu1~22.04.1
Ubuntu=22.04
All of
ubuntu/dotnet8<8.0.102-8.0.2-0ubuntu1~22.04.1
8.0.102-8.0.2-0ubuntu1~22.04.1
Ubuntu=22.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-6634-1?

    The vulnerability has been identified as potentially allowing attackers to cause a denial of service.

  • How do I fix USN-6634-1?

    To fix the vulnerability USN-6634-1, update to the recommended package versions of aspnetcore-runtime and dotnet.

  • Which products are affected by USN-6634-1?

    USN-6634-1 affects Ubuntu 23.10 installations of aspnetcore-runtime and dotnet packages.

  • What specific versions are patched in USN-6634-1?

    The patched versions include aspnetcore-runtime-6.0.127-0ubuntu1~23.10.1, aspnetcore-runtime-7.0.116-0ubuntu1~23.10.1, and aspnetcore-runtime-8.0.2-0ubuntu1~23.10.1.

  • Who discovered the vulnerabilities in USN-6634-1?

    The vulnerabilities were discovered by Brennan Conroy and Bahaa Naamneh.

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