Ubuntu 25.04: USN-7509-1 critical risk of .NET spoofing attack

ubuntu

May 19, 2025

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

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.

Topics Covered

security advisory ubuntu spoofing dotnet runtime alevel

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.