![]() Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. The information provided in this advisory is provided "as is" without warranty of any kind. You can ask questions in the linked discussion issue. The Announcements repo ( ) will contain this bulletin as an issue and will include a link to a discussion issue. You can ask questions about this issue on GitHub in the. NET Bounty Program including terms and conditions are at. NET 6.0, please email details to Reports may qualify for the Microsoft. If you have found a potential security issue in. We will at a future date share more detailed information about how we assess vulnerabilities against a reasonable worst-case scenario. We consider the ease of exploit and likely consequences to applications written in this manner. NET-based applications are not by default subject to this attack, we recognize that some applications may reasonably make authentication decisions based on the return values of the impacted API. In our assessment of this vulnerability, while. The full list of metrics can be found at (Opens in new window or tab). The score for your implementation this product may not be as severe, however we recommend installing the update as soon as possible in an abundance of caution.Īt the time this vulnerability report was published, the assessed CVSS score was 9.1. NET and similar products are scored with this advice in mind. The CVSS scoring guide recommends using a reasonable worst-case implementation scenario when scoring vulnerabilities in software libraries. Other Information Why does this vulnerability have such a high CVSS score? Once you have installed the updated runtime or SDK, restart your apps for the update to take effect.Īdditionally, if you've deployed self-contained applications targeting any of the impacted versions, these applications are also vulnerable and must be recompiled and redeployed. To access this either type "Check for updates" in your Windows search, or open Settings, choose Update & Security and then click Check for Updates. NET 8.0 updates are also available from Microsoft Update. NET 6.0, you should download and install Runtime 6.0.26 or SDK 6.0.321 (for Visual Studio 2022 v17.2) from. NET 7.0, you should download and install Runtime 7.0.15 or SDK 7.0.115 (for Visual Studio 2022 v17.4) from. NET 8.0, you should download and install. NET Core SDK (reflecting any global.json):īase Path: C:\Program Files\dotnet\sdk\6.0.300\ NET 6.0 or greater installed, you can list the versions you have installed by running the dotnet -info command. NET SDKs through Visual Studio, Visual Studio will prompt you to update Visual Studio, which will also update your. To fix the issue please install the latest version of.If you have a runtime or SDK with a version listed, or an affected package listed in affected software, you're exposed to the vulnerability. NET 8.0.0.Īdvisory FAQ How do I know if I am affected? Other project types, such as web applications, are not impacted by this vulnerability unless they explicitly invoke the X.509 chain building APIs themselves in a vulnerable manner or they consume an external package which does this on their behalf. NET, only the WindowsDesktop shared runtime contains inbox components which utilize X.509 chain building APIs in a vulnerable manner. AnnouncementĪnnouncement for this issue can be found at dotnet/announcements#291 Mitigation factors This could allow an adversary to subvert the app's typical authentication logic. Applications which utilize this reason code to make their own chain building trust decisions may inadvertently treat this scenario as a successful chain build. The framework will correctly report that X.509 chain building failed, but it will return an incorrect reason code for the failure. An attacker could present an arbitrary untrusted certificate with malformed signatures, triggering a bug in the framework. NET Framework-based applications use X.509 chain building APIs but do not completely validate the X.509 certificate due to a logic flaw. This advisory also provides guidance on what developers can do to update their applications to address this vulnerability.Ī security feature bypass vulnerability exists when Microsoft. Microsoft is releasing this security advisory to provide information about a vulnerability in. NET Security Feature bypass Vulnerability Executive summary ![]() Microsoft Security Advisory CVE-2024-0057.
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