==========================================================================
Ubuntu Security Notice USN-7509-1
May 16, 2025

dotnet8, dotnet9 vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 25.04
- Ubuntu 24.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

.NET could be used to perform spoofing over a network.

Software Description:
- dotnet8: .NET CLI tools and runtime
- dotnet9: .NET CLI tools and runtime

Details:

It was discovered that .NET did not properly handle file names and paths
under certain conditions. An attacker could possibly use this issue to
perform spoofing over a network.

Update instructions:

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

Ubuntu 25.04
  aspnetcore-runtime-8.0          8.0.16-0ubuntu1~25.04.1
  aspnetcore-runtime-9.0          9.0.5-0ubuntu1~25.04.1
  dotnet-host-8.0                 8.0.16-0ubuntu1~25.04.1
  dotnet-host-9.0                 9.0.5-0ubuntu1~25.04.1
  dotnet-hostfxr-8.0              8.0.16-0ubuntu1~25.04.1
  dotnet-hostfxr-9.0              9.0.5-0ubuntu1~25.04.1
  dotnet-runtime-8.0              8.0.16-0ubuntu1~25.04.1
  dotnet-runtime-9.0              9.0.5-0ubuntu1~25.04.1
  dotnet-sdk-8.0                  8.0.116-0ubuntu1~25.04.1
  dotnet-sdk-9.0                  9.0.106-0ubuntu1~25.04.1
  dotnet-sdk-aot-9.0              9.0.106-0ubuntu1~25.04.1
  dotnet8                         8.0.116-8.0.16-0ubuntu1~25.04.1
  dotnet9                         9.0.106-9.0.5-0ubuntu1~25.04.1

Ubuntu 24.10
  aspnetcore-runtime-8.0          8.0.16-0ubuntu1~24.10.1
  aspnetcore-runtime-9.0          9.0.5-0ubuntu1~24.10.1
  dotnet-apphost-pack-8.0         8.0.16-0ubuntu1~24.10.1
  dotnet-apphost-pack-9.0         9.0.5-0ubuntu1~24.10.1
  dotnet-host-8.0                 8.0.16-0ubuntu1~24.10.1
  dotnet-host-9.0                 9.0.5-0ubuntu1~24.10.1
  dotnet-hostfxr-8.0              8.0.16-0ubuntu1~24.10.1
  dotnet-hostfxr-9.0              9.0.5-0ubuntu1~24.10.1
  dotnet-runtime-8.0              8.0.16-0ubuntu1~24.10.1
  dotnet-runtime-9.0              9.0.5-0ubuntu1~24.10.1
  dotnet-sdk-8.0                  8.0.116-0ubuntu1~24.10.1
  dotnet-sdk-9.0                  9.0.106-0ubuntu1~24.10.1
  dotnet-sdk-aot-9.0              9.0.106-0ubuntu1~24.10.1
  dotnet8                         8.0.116-8.0.16-0ubuntu1~24.10.1
  dotnet9                         9.0.106-9.0.5-0ubuntu1~24.10.1

Ubuntu 24.04 LTS
  aspnetcore-runtime-8.0          8.0.16-0ubuntu1~24.04.1
  dotnet-host-8.0                 8.0.16-0ubuntu1~24.04.1
  dotnet-hostfxr-8.0              8.0.16-0ubuntu1~24.04.1
  dotnet-runtime-8.0              8.0.16-0ubuntu1~24.04.1
  dotnet-sdk-8.0                  8.0.116-0ubuntu1~24.04.1
  dotnet8                         8.0.116-8.0.16-0ubuntu1~24.04.1

Ubuntu 22.04 LTS
  aspnetcore-runtime-8.0          8.0.16-0ubuntu1~22.04.1
  dotnet-host-8.0                 8.0.16-0ubuntu1~22.04.1
  dotnet-hostfxr-8.0              8.0.16-0ubuntu1~22.04.1
  dotnet-runtime-8.0              8.0.16-0ubuntu1~22.04.1
  dotnet-sdk-8.0                  8.0.116-0ubuntu1~22.04.1
  dotnet8                         8.0.116-8.0.16-0ubuntu1~22.04.1

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

References:
  https://ubuntu.com/security/notices/USN-7509-1
  CVE-2025-26646

Package Information:
  https://launchpad.net/ubuntu/+source/dotnet8/8.0.116-8.0.16-0ubuntu1~25.04.1
  https://launchpad.net/ubuntu/+source/dotnet9/9.0.106-9.0.5-0ubuntu1~25.04.1
  https://launchpad.net/ubuntu/+source/dotnet8/8.0.116-8.0.16-0ubuntu1~24.10.1
  https://launchpad.net/ubuntu/+source/dotnet9/9.0.106-9.0.5-0ubuntu1~24.10.1
  https://launchpad.net/ubuntu/+source/dotnet8/8.0.116-8.0.16-0ubuntu1~24.04.1
  https://launchpad.net/ubuntu/+source/dotnet8/8.0.116-8.0.16-0ubuntu1~22.04.1