GHSA-25c8-p796-jg6r: Microsoft Security Advisory CVE-2023-33170: .NET Security Feature Bypass Vulnerability
Microsoft Security Advisory CVE-2023-33170: .NET Security Feature Bypass VulnerabilityExecutive summaryMicrosoft is releasing this security advisory to provide information about a vulnerability in ASP.NET Core 2.1 and above. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.A vulnerability exist in ASP.NET  Core applications where account lockout maximum failed attempts may not be immediately updated, allowing an attacker to try more passwords.DiscussionDiscussion for this issue can be found at https://github.com/dotnet/aspnetcore/issues/49334Mitigation factorsMicrosoft has not identified any mitigating factors for this vulnerability.Affected softwareAny ASP.NET 7.0 application running on .NET 7.0.8 or earlier.Any ASP.NET 6.0 application running on .NET 6.0.19 or earlier.Any ASP.NET Core 2.1 application consuming the package Microsoft.AspNetCore.Identity version 2.1.31 or earlier.If your application uses the following package versions, ensure you update to the latest version of .NET.ASP.NET Core 2.1Package name | Affected version | Patched version
------------ | ---------------- | -------------------------
[ Microsoft.AspNetCore.Identity](https://www.nuget.org/packages/Microsoft.AspNetCore.Identity/2.1.39)      | <=2.1.39 | 2.1.39Microsoft.AspNet.Identity.OwinPackage name | Affected version | Patched version
------------ | ---------------- | -------------------------
[ Microsoft.AspNet.Identity.Owin](https://www.nuget.org/packages/Microsoft.AspNet.Identity.Owin)    |  <= 2.2.3 | 2.2.4ASP.NET 6.0Package name | Affected version | Patched version
------------ | ---------------- | -------------------------[Microsoft.AspNetCore.App.Runtime.linux-arm](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.linux-arm)               |  <= 6.0.19 | 6.0.20
[Microsoft.AspNetCore.App.Runtime.linux-arm64](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.linux-arm64)           |  <= 6.0.19 | 6.0.20
[Microsoft.AspNetCore.App.Runtime.linux-musl-arm](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.linux-musl-arm)     |  <= 6.0.19 | 6.0.20
[Microsoft.AspNetCore.App.Runtime.linux-musl-arm64](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.linux-musl-arm64) |  <= 6.0.19 | 6.0.20
[Microsoft.AspNetCore.App.Runtime.linux-musl-x64](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.linux-musl-x64)     |  <= 6.0.19 | 6.0.20
[Microsoft.AspNetCore.App.Runtime.linux-x64](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.linux-x64)               |  <= 6.0.19 | 6.0.20
[Microsoft.AspNetCore.App.Runtime.osx-arm64](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.osx-arm64)               |  <= 6.0.19 | 6.0.20
[Microsoft.AspNetCore.App.Runtime.osx-x64](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.osx-x64)                   |  <= 6.0.19 | 6.0.20
[Microsoft.AspNetCore.App.Runtime.win-arm](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.win-arm)                   |  <= 6.0.19 | 6.0.20
[Microsoft.AspNetCore.App.Runtime.win-arm64](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.win-arm64)               |  <= 6.0.19 | 6.0.20
[Microsoft.AspNetCore.App.Runtime.win-x64](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.win-x64)                   |  <= 6.0.19 | 6.0.20
[Microsoft.AspNetCore.App.Runtime.win-x86](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.win-x86)                   |  <= 6.0.19 | 6.0.20ASP.NET 7.0Package name | Affected version | Patched version
------------ | ---------------- | -------------------------
[Microsoft.AspNetCore.App.Runtime.linux-arm](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.linux-arm)               |  <= 7.0.9 | 7.0.9
[Microsoft.AspNetCore.App.Runtime.linux-arm64](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.linux-arm64)           |  <= 7.0.9 | 7.0.9
[Microsoft.AspNetCore.App.Runtime.linux-musl-arm](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.linux-musl-arm)     |  <= 7.0.9 | 7.0.9
[Microsoft.AspNetCore.App.Runtime.linux-musl-arm64](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.linux-musl-arm64) |  <= 7.0.9 | 7.0.9
[Microsoft.AspNetCore.App.Runtime.linux-musl-x64](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.linux-musl-x64)     |  <= 7.0.9 | 7.0.9
[Microsoft.AspNetCore.App.Runtime.linux-x64](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.linux-x64)               |  <= 7.0.9 | 7.0.9
[Microsoft.AspNetCore.App.Runtime.osx-arm64](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.osx-arm64)               |  <= 7.0.9 | 7.0.9
[Microsoft.AspNetCore.App.Runtime.osx-x64](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.osx-x64)                   |  <= 7.0.9 | 7.0.9
[Microsoft.AspNetCore.App.Runtime.win-arm](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.win-arm)                   |  <= 7.0.9 | 7.0.9
[Microsoft.AspNetCore.App.Runtime.win-arm64](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.win-arm64)               |  <= 7.0.9 | 7.0.9
[Microsoft.AspNetCore.App.Runtime.win-x64](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.win-x64)                   |  <= 7.0.9 | 7.0.9
[Microsoft.AspNetCore.App.Runtime.win-x86](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.win-x86)                   |  <= 7.0.9 | 7.0.9Advisory FAQHow do I know if I am affected?If you have a runtime or SDK with a version listed, or an affected package listed in [affected software](#affected-software), you're exposed to the vulnerability.How do I fix the issue?To fix the issue please install the latest version of .NET 6.0 or .NET 7.0. If you have installed one or more .NET SDKs through Visual Studio, Visual Studio will prompt you to update Visual Studio, which will also update your .NET  SDKs.If you are using one of the affected packages, please update to the patched version listed above.If you have .NET 6.0 or greater installed, you can list the versions you have installed by running the `dotnet --info` command. You will see output like the following;If you're using .NET 7.0, you should download and install Runtime 7.0.7 or SDK 7.0.106 (for Visual Studio 2022 v17.4) from https://dotnet.microsoft.com/download/dotnet-core/7.0.If you're using .NET 6.0, you should download and install Runtime 6.0.18 or SDK 6.0.312 (for Visual Studio 2022 v17.2) from https://dotnet.microsoft.com/download/dotnet-core/6.0.If you're using ASP.NET Core 2.1 and consuming the Microsoft.AspNetCore.Identity package, update that package to version [2.1.39](https://www.nuget.org/packages/Microsoft.AspNetCore.Identity/2.1.39).NET 6.0 and and .NET 7.0 updates are also available from Microsoft Update. To access this either type "Check for updates" in your Windows search, or open Settings, choose Update & Security and then click Check for Updates.Once you have installed the updated runtime or SDK, restart your apps for the update to take effect.Additionally, if you've deployed [self-contained applications](https://docs.microsoft.com/dotnet/core/deploying/#self-contained-deployments-scd) targeting any of the impacted versions, these applications are also vulnerable and must be recompiled and redeployed.Other InformationReporting Security IssuesIf you have found a potential security issue in .NET 6.0 or .NET 7.0, please email details to secure@microsoft.com. Reports may qualify for the Microsoft .NET Core & .NET 5 Bounty. Details of the Microsoft .NET Bounty Program including terms and conditions are at <https://aka.ms/corebounty>.SupportYou can ask questions about this issue on GitHub in the .NET GitHub organization. The main repos are located at https://github.com/dotnet/runtime and https://github.com/dotnet/aspnet/. The Announcements repo (https://github.com/dotnet/Announcements) will contain this bulletin as an issue and will include a link to a discussion issue. You can ask questions in the linked discussion issue.DisclaimerThe information provided in this advisory is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.External Links[CVE-2023-33170]( https://www.cve.org/CVERecord?id=CVE-2023-33170)RevisionsV1.0 (July 11, 2023): Advisory published._Version 1.0__Last Updated 2023-07-11_
CVSS v3.1: 8.1