Security Only Update for .NET Framework 4.8 for Windows 7 SP1 and Server 2008 R2 SP1 (KB4506956)

Applies to:

Microsoft .NET Framework 4.8

Summary

A remote code execution vulnerability exists in .NET software when the software fails to check the source markup of a file. An Authentication Bypass vulnerability exists in WCF and WIF, allowing signing of SAML tokens with arbitrary symmetric keys. This vulnerability allows an attacker to impersonate another user. The vulnerability exists in WCF, WIF 3.5 and above in .NET Framework, WIF 1.0 component in Windows, WIF Nuget package, and WIF implementation in Sharepoint. An information disclosure vulnerability exists when Exchange and Azure Active Directory allow creation of entities with Display Names having non-printable characters.

To learn more about the vulnerabilities, go to the following Common Vulnerabilities and Exposures (CVE).

Additional information about this update

The following articles contain additional information about this update as it relates to individual product versions.

  • 4507411 Description of the Security Only Update for .NET Framework 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows 7 SP1 and Server 2008 R2 SP1 (KB4507411)

How to obtain and install the update

Method 1: Microsoft Update Catalog

To get the standalone package for this update, go to the Microsoft Update Catalog.

Method 2: Windows Software Update Services (WSUS)

On your WSUS server, follow these steps:

  1. Select Start, select Administrative Tools, and then select Microsoft Windows Server Update Services 3.0.

  2. Expand ComputerName, and then select Action.

  3. Select Import Updates.

  4. WSUS opens a browser window in which you may be prompted to install an ActiveX control. You must install the ActiveX control to continue.

  5. After the ActiveX control is installed, you see the Microsoft Update Catalog screen. Type 4507411 into the Search box, and then select Search.

  6. Locate the .NET Framework packages that match the operating systems, languages, and processors in your environment. Select Add to add them to your basket.

  7. After you select all the packages that you require, select View Basket.

  8. To import the packages to your WSUS server, select Import.

  9. After the packages are imported, select Close to return to WSUS.

The updates are now available for installation through WSUS.

Update deployment information

For deployment details for this security update, go to the following article in the Microsoft Knowledge Base:

20190709 Security update deployment information: July 9, 2019

Update removal information

Note We do not recommend that you remove any security update. To remove this update, use the Programs and Features item in Control Panel.

Update restart information

This update does not require a system restart after you apply it unless files that are being updated are locked or are being used.

Update replacement information

This update replaces previously released updates 4457914.


File information
The English (United States) version of this update installs files that have the attributes that are listed in the following tables. The dates and times for these files are listed in Coordinated Universal Time (UTC). The dates and times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and times may change when you perform certain operations on the files.

 

File information

File hash information

File name

SHA1 hash

SHA256 hash

NDP48-KB4506956-x64.exe

913BC7543132DFF3699607276E3964524DC29833

CED399BA54A12BA4CA01CC067F494913ECE2274FE241965AD7038F5BA9921E60

NDP48-KB4506956-x86.exe

5D57847CE518AE5D18394D4936130D56B003221C

FB00F91DCD5239F7642697E1507818DE7346E887FC48B09CE4338E45B78C4157

For all supported x64-based versions

File name

File version

File size

Date

Time

ServiceMonikerSupport.dll

4.8.3825.0

34,560

03-Jun-2019

17:30

ServiceMonikerSupport.dll

4.8.3825.0

31,488

03-Jun-2019

17:18

SMDiagnostics.dll

4.8.3825.0

73,544

03-Jun-2019

17:18

System.Activities.dll

4.8.3825.0

1,533,344

03-Jun-2019

17:18

System.IdentityModel.dll

4.8.3825.0

1,093,960

03-Jun-2019

17:18

System.IdentityModel.Services.dll

4.8.3825.0

198,400

03-Jun-2019

17:18

System.Runtime.Serialization.dll

4.8.3825.0

1,054,112

03-Jun-2019

17:18

System.ServiceModel.Channels.dll

4.8.3825.0

157,744

03-Jun-2019

17:18

System.ServiceModel.Discovery.dll

4.8.3825.0

308,272

03-Jun-2019

17:18

System.ServiceModel.dll

4.8.3825.0

6,386,504

03-Jun-2019

17:18

System.ServiceModel.Internals.dll

4.8.3825.0

253,344

03-Jun-2019

17:18

System.ServiceModel.WasHosting.dll

4.8.3825.0

40,192

03-Jun-2019

17:18

System.Workflow.Activities.dll

4.8.3825.0

1,050,368

03-Jun-2019

17:18

System.Workflow.ComponentModel.dll

4.8.3825.0

1,556,528

03-Jun-2019

17:18

System.Workflow.Runtime.dll

4.8.3825.0

502,528

03-Jun-2019

17:18

WorkflowServiceHostPerformanceCounters.dll

4.8.3825.0

102,168

03-Jun-2019

17:30

WorkflowServiceHostPerformanceCounters.dll

4.8.3825.0

88,856

03-Jun-2019

17:18

For all supported x86-based versions

File name

File version

File size

Date

Time

ServiceMonikerSupport.dll

4.8.3825.0

31,488

03-Jun-2019

17:18

SMDiagnostics.dll

4.8.3825.0

73,544

03-Jun-2019

17:18

System.Activities.dll

4.8.3825.0

1,533,344

03-Jun-2019

17:18

System.IdentityModel.dll

4.8.3825.0

1,093,960

03-Jun-2019

17:18

System.IdentityModel.Services.dll

4.8.3825.0

198,400

03-Jun-2019

17:18

System.Runtime.Serialization.dll

4.8.3825.0

1,054,112

03-Jun-2019

17:18

System.ServiceModel.Channels.dll

4.8.3825.0

157,744

03-Jun-2019

17:18

System.ServiceModel.Discovery.dll

4.8.3825.0

308,272

03-Jun-2019

17:18

System.ServiceModel.dll

4.8.3825.0

6,386,504

03-Jun-2019

17:18

System.ServiceModel.Internals.dll

4.8.3825.0

253,344

03-Jun-2019

17:18

System.ServiceModel.WasHosting.dll

4.8.3825.0

40,192

03-Jun-2019

17:18

System.Workflow.Activities.dll

4.8.3825.0

1,050,368

03-Jun-2019

17:18

System.Workflow.ComponentModel.dll

4.8.3825.0

1,556,528

03-Jun-2019

17:18

System.Workflow.Runtime.dll

4.8.3825.0

502,528

03-Jun-2019

17:18

WorkflowServiceHostPerformanceCounters.dll

4.8.3825.0

88,856

03-Jun-2019

17:18

Information about protection and security

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