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

.NET could be used to perform spoofing over a network.. ========================================================================== 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 . Ensure your Ubuntu installation is up to date to fix .NET vulnerabilities and safeguard against potentialcyber threats.. Ubuntu Security, .NET Spoofing, Runtime Security. . Severity: Critical. LinuxSecurity.com Team

May 19, 2025 •Critical Ubuntu