Ubuntu 22.04 LTS: USN-6362-2 Critical: Incomplete .NET Denial of Service

ubuntu

October 25, 2023

An incomplete fix was discovered in .Net.

Summary

An incomplete fix was discovered in .Net.

Software Description:

- dotnet6: dotNET CLI tools and runtime

- dotnet7: dotNET CLI tools and runtime

Details:

USN-6362-1 fixed vulnerabilities in .Net. It was discovered that the fix

for [CVE-2023-36799](https://ubuntu.com/security/CVE-2023-36799) was incomplete. This update fixes the problem.

Original advisory details:

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.

Topics Covered

security advisory denial of service Ubuntu dotnet incomplete fix

Update Instructions

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

Ubuntu 23.04:
  aspnetcore-runtime-6.0          6.0.124-0ubuntu1~23.04.1
  aspnetcore-runtime-7.0          7.0.113-0ubuntu1~23.04.1
  dotnet-host                     6.0.124-0ubuntu1~23.04.1
  dotnet-host-7.0                 7.0.113-0ubuntu1~23.04.1
  dotnet-hostfxr-6.0              6.0.124-0ubuntu1~23.04.1
  dotnet-hostfxr-7.0              7.0.113-0ubuntu1~23.04.1
  dotnet-runtime-6.0              6.0.124-0ubuntu1~23.04.1
  dotnet-runtime-7.0              7.0.113-0ubuntu1~23.04.1
  dotnet-sdk-6.0                  6.0.124-0ubuntu1~23.04.1
  dotnet-sdk-7.0                  7.0.113-0ubuntu1~23.04.1
  dotnet6                         6.0.124-0ubuntu1~23.04.1
  dotnet7                         7.0.113-0ubuntu1~23.04.1

Ubuntu 22.04 LTS:
  aspnetcore-runtime-6.0          6.0.124-0ubuntu1~22.04.1
  aspnetcore-runtime-7.0          7.0.113-0ubuntu1~22.04.1
  dotnet-host                     6.0.124-0ubuntu1~22.04.1
  dotnet-host-7.0                 7.0.113-0ubuntu1~22.04.1
  dotnet-hostfxr-6.0              6.0.124-0ubuntu1~22.04.1
  dotnet-hostfxr-7.0              7.0.113-0ubuntu1~22.04.1
  dotnet-runtime-6.0              6.0.124-0ubuntu1~22.04.1
  dotnet-runtime-7.0              7.0.113-0ubuntu1~22.04.1
  dotnet-sdk-6.0                  6.0.124-0ubuntu1~22.04.1
  dotnet-sdk-7.0                  7.0.113-0ubuntu1~22.04.1
  dotnet6                         6.0.124-0ubuntu1~22.04.1
  dotnet7                         7.0.113-0ubuntu1~22.04.1

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