USN-6634-1: .NET vulnerabilities

13 February 2024

Several security issues were fixed in .NET.

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Releases

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)

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.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 23.10
Ubuntu 22.04

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