CVE-2025-24070: 
C# vulnerability analysis and mitigation

A weak authentication vulnerability was identified in ASP.NET Core & Visual Studio (CVE-2025-24070), disclosed on March 11, 2025. The vulnerability allows unauthorized attackers to elevate privileges over a network. This security flaw affects various versions of .NET, including .NET 6, 7, and 8 (NVD, Ubuntu Security).

The vulnerability has been assigned a CVSS v3.1 Base Score of 7.0 (High), with the following vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H. The attack vector is network-based, requiring high attack complexity, with no privileges required and no user interaction needed. The scope is unchanged, with low impact on confidentiality and integrity, but high impact on availability. The vulnerability is classified under CWE-1390 (Weak Authentication) (NVD).

The vulnerability poses significant risks as it allows unauthorized attackers to elevate privileges over a network. The CVSS scoring indicates high availability impact, while maintaining low impacts on confidentiality and integrity. This suggests that successful exploitation could primarily affect system availability while potentially allowing limited access to sensitive information and system modifications (NVD).

Microsoft has released patches for affected versions. Ubuntu has implemented fixes for .NET 8 (version 8.0.114-8.0.14) and .NET 9 (version 9.0.104-9.0.3) in various distributions. .NET 7, being an interim release, is end of life and will not receive security updates. The status of .NET 6 fixes is currently deferred pending impact assessment (Ubuntu Security).