CVE-2023-33170

Microsoft Security Advisory CVE-2023-33170: .NET Security Feature Bypass Vulnerability

Executive summary

Microsoft 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.

Discussion

Discussion for this issue can be found at https://github.com/dotnet/aspnetcore/issues/49334

Mitigation factors

Microsoft has not identified any mitigating factors for this vulnerability.

Affected software

• Any 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 2.1

Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- Microsoft.AspNetCore.Identity | <=2.1.39 | 2.1.39

Microsoft.AspNet.Identity.Owin

Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- Microsoft.AspNet.Identity.Owin | <= 2.2.3 | 2.2.4

ASP.NET 6.0

Package name | Affected version | Patched version ------------ | ---------------- | -------------------------

Microsoft.AspNetCore.App.Runtime.linux-arm | <= 6.0.19 | 6.0.20 Microsoft.AspNetCore.App.Runtime.linux-arm64 | <= 6.0.19 | 6.0.20 Microsoft.AspNetCore.App.Runtime.linux-musl-arm | <= 6.0.19 | 6.0.20 Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 | <= 6.0.19 | 6.0.20 Microsoft.AspNetCore.App.Runtime.linux-musl-x64 | <= 6.0.19 | 6.0.20 Microsoft.AspNetCore.App.Runtime.linux-x64 | <= 6.0.19 | 6.0.20 Microsoft.AspNetCore.App.Runtime.osx-arm64 | <= 6.0.19 | 6.0.20 Microsoft.AspNetCore.App.Runtime.osx-x64 | <= 6.0.19 | 6.0.20 Microsoft.AspNetCore.App.Runtime.win-arm | <= 6.0.19 | 6.0.20 Microsoft.AspNetCore.App.Runtime.win-arm64 | <= 6.0.19 | 6.0.20 Microsoft.AspNetCore.App.Runtime.win-x64 | <= 6.0.19 | 6.0.20 Microsoft.AspNetCore.App.Runtime.win-x86 | <= 6.0.19 | 6.0.20

ASP.NET 7.0

Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- Microsoft.AspNetCore.App.Runtime.linux-arm | <= 7.0.9 | 7.0.9…

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

The following packages have been upgraded to a later upstream version: dotnet7.0 (SDK 7.0.109, Runtime 7.0.9). (BZ#2219633)

Security Fix(es):

• dotnet: race condition in Core SignInManager<TUser> PasswordSignInAsync method (CVE-2023-33170)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

The following packages have been upgraded to a later upstream version: dotnet6.0 (SDK 6.0.120, Runtime 6.0.20). (BZ#2219639)

Security Fix(es):

• dotnet: race condition in Core SignInManager<TUser> PasswordSignInAsync method (CVE-2023-33170)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

ASP.NET and Visual Studio Security Feature Bypass Vulnerability

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

The following packages have been upgraded to a later upstream version: dotnet7.0 (SDK 7.0.109, Runtime 7.0.9). (BZ#2219634)

Security Fix(es):

• dotnet: race condition in Core SignInManager<TUser> PasswordSignInAsync method (CVE-2023-33170)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

The following packages have been upgraded to a later upstream version: dotnet7.0 (SDK 7.0.109, Runtime 7.0.9). (BZ#2219633)

Security Fix(es):

• dotnet: race condition in Core SignInManager<TUser> PasswordSignInAsync method (CVE-2023-33170)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

The following packages have been upgraded to a later upstream version: dotnet6.0 (SDK 6.0.120, Runtime 6.0.20). (BZ#2219639)

Security Fix(es):

• dotnet: race condition in Core SignInManager<TUser> PasswordSignInAsync method (CVE-2023-33170)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

The following packages have been upgraded to a later upstream version: dotnet6.0 (SDK 6.0.120, Runtime 6.0.20). (BZ#2219640)

Security Fix(es):

• dotnet: race condition in Core SignInManager<TUser> PasswordSignInAsync method (CVE-2023-33170)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

ASP.NET and Visual Studio Security Feature Bypass Vulnerability

ASP.NET and Visual Studio Security Feature Bypass Vulnerability

McKee-Harris, Matt Cotterell, and Jack Moran discovered that .NET did not properly update account lockout maximum failed attempts. An attacker could possibly use this issue to bypass the security feature and attempt to guess more passwords for an account.