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.NET Framework December 2019 Security and Quality Rollup


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Today, we are releasing the December 2019 Security and Quality Rollup Updates for .NET Framework.

Quality and Reliability

This release contains the following quality and reliability improvements.

ASP.NET

  • ASP.NET will now emit a SameSite cookie header when HttpCookie.SameSite value is “None” to accommodate upcoming changes to SameSite cookie handling in Chrome. As part of this change, FormsAuth and SessionState cookies will also be issued with SameSite = ‘Lax’ instead of the previous default of ‘None’, though these values can be overridden in web.config. For more information, refer to Work with SameSite cookies in ASP.NET.

CLR1

  • Addresses and issue where some ClickOnce applications or applications creating the default AppDomain with a restricted permission set may observe application launch or application runtime failures, or unexpected behaviors. The observable issue was the System.AppDomainSetup.TargetFrameworkName is null, leading to any quirks enabling reverting back to .NET Framework 4.0 behaviors.

WPF2

  • Addresses an issue where some Per-Monitor Aware WPF applications that host System-Aware or Unaware child-windows, and run on .NET 4.8, may occasionally encounter a crash with exceptionSystem.Collections.Generic.KeyNotFoundException.

1 Common Language Runtime (CLR)
2 Windows Presentation Foundation (WPF)

Getting the Update

The Security and Quality Rollup is available via Windows Update, Windows Server Update Services, and Microsoft Update Catalog.

Microsoft Update Catalog

You can get the update via the Microsoft Update Catalog. For Windows 10, NET Framework 4.8 updates are available via Windows Update, Windows Server Update Services, Microsoft Update Catalog. Updates for other versions of .NET Framework are part of the Windows 10 Monthly Cumulative Update.

Note: Customers that rely on Windows Update and Windows Server Update Services will automatically receive the .NET Framework version-specific updates. Advanced system administrators can also take use of the below direct Microsoft Update Catalog download links to .NET Framework-specific updates. Before applying these updates, please ensure that you carefully review the .NET Framework version applicability, to ensure that you only install updates on systems where they apply.

The following table is for Windows 10 and Windows Server 2016+ versions.

Product Version Cumulative Update
Windows 10 1909 and Windows Server, version 1909
.NET Framework 3.5, 4.8 Catalog 4533002
Windows 10 1903 and Windows Server, version 1903
.NET Framework 3.5, 4.8 Catalog 4533002
Windows 10 1809 (October 2018 Update) and Windows Server 2019 4533094
.NET Framework 3.5, 4.7.2 Catalog 4533013
.NET Framework 3.5, 4.8 Catalog 4533001
Windows 10 1803 (April 2018 Update)
.NET Framework 3.5, 4.7.2 Catalog 4530717
.NET Framework 3.5, 4.8 Catalog 4533000
Windows 10 1709 (Fall Creators Update)
.NET Framework 3.5, 4.7.1, 4.7.2 Catalog 4530714
.NET Framework 3.5, 4.8 Catalog 4532999
Windows 10 1703 (Creators Update)
.NET Framework 3.5, 4.7, 4.7.1, 4.7.2 Catalog 4530711
.NET Framework 3.5, 4.8 Catalog 4532998
Windows 10 1607 (Anniversary Update) and Windows Server 2016
.NET Framework 3.5, 4.6.2, 4.7, 4.7.1, 4.7.2 Catalog 4530689
.NET Framework 3.5, 4.8 Catalog 4532997

The following table is for earlier Windows and Windows Server versions.

Product Version Security and Quality Rollup
Windows 8.1, Windows RT 8.1 and Windows Server 2012 R2 4533097
.NET Framework 3.5 Catalog 4514371
.NET Framework 4.5.2 Catalog 4514367
.NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2 Catalog 4533011
.NET Framework 4.8 Catalog 4533004
Windows Server 2012 4533096
.NET Framework 3.5 Catalog 4514370
.NET Framework 4.5.2 Catalog 4514368
.NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2 Catalog 4533010
.NET Framework 4.8 Catalog 4533003
Windows 7 SP1 and Windows Server 2008 R2 SP1 4533095
.NET Framework 3.5.1 Catalog 4507004
.NET Framework 4.5.2 Catalog 4507001
.NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2 Catalog 4533012
.NET Framework 4.8 Catalog 4533005
Windows Server 2008 4533098
.NET Framework 2.0, 3.0 Catalog 4507003
.NET Framework 4.5.2 Catalog 4507001
.NET Framework 4.6 Catalog 4533012

Previous Monthly Rollups

The last few .NET Framework Monthly updates are listed below for your convenience:
* November 2019 Preview of Quality Rollup
* October 2019 Preview of Quality Rollup
* October 2019 Security and Quality Rollup

The post .NET Framework December 2019 Security and Quality Rollup appeared first on .NET Blog.

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