Description of the Security Only update for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, and 4.7.2 for Windows Server 2012 (KB 4470498)

Summary

This security update resolves a vulnerability in Microsoft .NET Framework that could allow remote code execution when Microsoft .NET Framework doesn't validate input correctly. An attacker who successfully exploits this vulnerability could take control of an affected system. The attacker could then install programs; view, change, or delete data; or create new accounts that use full user rights. Users whose accounts are configured to have fewer user rights on the system could be less affected than users who operate with administrative user rights.

To exploit the vulnerability, an attacker would have to pass specific input to an application that uses susceptible .NET Framework methods.

This security update addresses the vulnerability by correcting how .NET Framework validates input.

To learn more about this vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2018-8540.

Important

All updates for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, and 4.7.2 require that the d3dcompiler_47.dll update is installed. We recommend that you install the included d3dcompiler_47.dll update before you apply this update. For more information about the d3dcompiler_47.dll, see KB 4019990.
If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.

Additional information about this security update

For more information about this security update as it relates to Windows Server 2012, see the following article in the Microsoft Knowledge Base:

4471982 Security Only updates for .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, and 4.7.2 for Windows Server 2012 (KB 4471982)

How to obtain and install the update

Method 1: Microsoft Update Catalog

To get the stand-alone package for this update, go to the Microsoft Update Catalog.

Method 2: Windows Software Update Services (WSUS)

On your WSUS server, follow these steps:

Select Start, select Administrative Tools, and then select Microsoft Windows Server Update Services 3.0.
Expand ComputerName, and then select Action.
Select Import Updates.
WSUS opens a browser window in which you may be prompted to install an ActiveX control. Install the ActiveX control to continue.
After the ActiveX control is installed, you see the Microsoft Update Catalog screen. Type 4471982 in the Search box, and then select Search.
Locate the .NET Framework packages that match the operating systems, languages, and processors in your environment. Select Add to add them to your basket.
After you select all the packages that you need, select View Basket.
To import the packages to your WSUS server, select Import.
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:

20181211 Security update deployment information: December 11, 2018

Update removal information

Note We don't 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 update KB 3098784.

File information

File hash

File name	SHA1 hash	SHA256 hash
Windows8-RT-KB4470498-x86.msu	155AE4DCFD853E0DBCA98E93D7C463237EAEB4C0	A1B3F7C4861418F95A9373B28B497B907C5DD29944AA83AD55D11DDCFC2182E7
Windows8-RT-KB4470498-x64.msu	0A2283C05A776740F68BCCB05DC6D7CB6EE79BC1	6221964527DC90DBB073BC6AA18A7B308A1EABD927B1048E434B0D0821490416

File attributes for all supported x86-based systems

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 name	File version	File size	Date	Time
system.web.applicationservices.dll	4.7.3282.0	71,120	31-Oct-2018	01:33
system.web.extensions.dll	4.7.3282.0	1,850,264	31-Oct-2018	01:33
aspnet_perf.dll	4.7.3282.0	42,792	31-Oct-2018	01:33
aspnet_state_perf.h		318	30-Oct-2018	23:38
aspnet_state_perf.ini		42,996	31-Oct-2018	01:34
aspnet_wp.exe	4.7.3282.0	46,088	31-Oct-2018	01:33
msvcp120_clr0400.dll	12.0.52519.0	485,576	30-Oct-2018	22:54
msvcr120_clr0400.dll	12.0.52519.0	987,840	30-Oct-2018	22:54
system.web.extensions.dll	4.7.3282.0	1,850,264	31-Oct-2018	01:33
webengine4.dll	4.7.3282.0	550,152	31-Oct-2018	01:33
webengine.dll	4.7.3282.0	24,840	31-Oct-2018	01:33
system.web.dll	4.7.3282.0	5,416,232	31-Oct-2018	01:33

File attributes for all supported x64-based systems