Notice

This update is included in the Security and Quality Rollup that's dated November 14, 2017. This update was previously released as part of the Preview of Quality Rollup on October 17, 2017, the Security and Quality Rollup on October 10, 2017, and the Security and Quality Rollup on September 12, 2017.

View products that this article applies to.

Summary

This security update resolves a vulnerability in the Microsoft .NET Framework that could allow remote code execution when Microsoft .NET Framework processes untrusted input. An attacker who successfully exploits this vulnerability by using the .NET Framework could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts that have full user rights. Users whose accounts are configured to have fewer user rights on the system could be less affected than users who operate by using administrative user rights.

To exploit the vulnerability, an attacker must first convince the user to open a malicious document or application.

This security update addresses the vulnerability by correcting how the .NET Framework validates untrusted input. To learn more about this vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2017-8759.

Important

  • All updates for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 require update KB 2919355 to be installed. We recommend that you install update KB 2919355 on your Windows RT 8.1-based, Windows 8.1-based, or Windows Server 2012 R2-based computer so that you receive updates in the future.

  • 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.

Quality and reliability fixes

Area

Description of the improvements

CLR1

  • Very rarely, an instance of ReaderWriterLock may hang in the process of releasing a lock. A new configuration variable is introduced to allow opting in to the fix. To fix the issue, set the COMPlus_ReaderWriterLock_UseFixedIdGeneration environment variable to 1 before you start the application.

Networking

  • A fix that was included in the May Monthly Security and Quality Rollup is changed to improve the performance of network latency. This latency affects Active Directory lookups for the enhanced key usage (EKU) object identifiers (OIDs) function that is used in TLS (Transport Layer Security) and SSL (Secure Sockets Layer) certificates.

WMI2

  • Code is changed to make the setting of the privileges event-driven so that it can support changes in the option values.

1  Common Language Runtime (CLR)
2 Windows Management Infrastructure (WMI)

More information

The following article provide information about supported .NET Framework versions for this Windows version. This includes the month and year of release, update replacement information, and help and support information for the update.

4049017 November 2017 Security and Quality Rollup for .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2 and 4.7 updates for Windows 8.1, Windows RT 8.1 and Windows Server 2012 R2 (KB 4049017)

4042078 October 2017 Preview of Quality Rollup for .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2 and 4.7 updates for Windows 8.1, Windows RT 8.1 and Windows Server 2012 R2 (KB 4042078)

4043767 October 2017 Security and Quality Rollup for .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2, and 4.7 updates for Windows 8.1, Windows RT 8.1 and Windows Server 2012 R2 (KB 4043767)

4041085 Security and Quality Rollup for the .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2, and 4.7 for Windows 8.1, Windows RT 8.1, and Windows Server 2012 R2: September 12, 2017

How to obtain and install the update

Method 1: Windows Update

This update is available through Windows Update. If automatic updating is turned on, this update is downloaded and installed automatically. For more information about how to get security updates automatically, see Windows Update: FAQ.

Method 2: Microsoft Update Catalog

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

Method 3: 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. Install the ActiveX control to continue.

  5. After the control is installed, you see the Microsoft Update Catalog screen. Enter 4049017 in 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 need, select View Basket.

  8. Select Import to import the packages to your WSUS server.

  9. To return to WSUS, select Close after the packages have been imported.

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:

20170912 Security update deployment information: September 12, 2017

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 updates 4035038 and 4032115.

 

File information

File hash

Package name

Package hash SHA 1

Package hash SHA 2

Windows8.1-KB4040981-x64.msu

ACC8F5A9AC418DAD332E87A117C21EF8C96B983C

02EE4EB888F6CE6ECBBC57C2C76850E8FDA65E7CE32B3DC3B47A3A09EF26FE40

Windows8.1-KB4040981-x86.msu

96DA978D6F44B2918905D02D6935D31819FB21D1

8505BA3B453BB2C7B82CEA3BF9294A0314BA308C60811D346A6D7A7C6B73AEA1


File attributes

The English (United States) version of this hotfix 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.

For all x86-based systems

File name

File version

File size

Date

Time

presentationframework.dll

3.0.6920.8773

5,283,840

30-Mar-2017

13:15

reachframework.dll

3.0.6920.8773

532,480

30-Mar-2017

13:15

system.management.dll

2.0.50727.8766

389,120

12-Jul-2017

13:11

system.runtime.remoting.dll

2.0.50727.8771

307,200

31-Aug-2017

13:17

system.security.dll

2.0.50727.8759

270,336

30-Mar-2017

13:14

system.web.regularexpressions.dll

2.0.50727.8762

98,304

22-Apr-2017

13:09

system.dll

2.0.50727.8770

3,203,072

31-Aug-2017

13:17

windowsbase.dll

3.0.6920.8773

1,257,472

30-Mar-2017

13:15

big5.nlp

66,728

23-Sep-2015

13:34

bopomofo.nlp

82,172

23-Sep-2015

13:34

ksc.nlp

116,756

23-Sep-2015

13:34

mscorlib.dll

2.0.50727.8762

4,554,752

22-Apr-2017

13:09

normidna.nlp

59,342

23-Sep-2015

13:34

normnfc.nlp

45,794

23-Sep-2015

13:34

normnfd.nlp

39,284

23-Sep-2015

13:34

normnfkc.nlp

66,384

23-Sep-2015

13:34

normnfkd.nlp

60,294

23-Sep-2015

13:34

prc.nlp

83,748

23-Sep-2015

13:34

prcp.nlp

83,748

23-Sep-2015

13:34

sortkey.nlp

262,148

23-Sep-2015

13:34

sorttbls.nlp

20,320

23-Sep-2015

13:34

xjis.nlp

28,288

23-Sep-2015

13:34

aspnet_wp.exe

2.0.50727.8762

31,384

22-Apr-2017

13:09

mscordacwks.dll

2.0.50727.8762

990,368

22-Apr-2017

13:09

mscorwks.dll

2.0.50727.8762

5,946,520

22-Apr-2017

13:09

sos.dll

2.0.50727.8762

389,776

22-Apr-2017

13:09

webengine.dll

2.0.50727.8762

437,400

22-Apr-2017

13:09

wminet_utils.dll

2.0.50727.8766

116,896

12-Jul-2017

13:11

presentationcore.dll

3.0.6920.8773

4,222,976

30-Mar-2017

13:15

presentationfontcache.exe.config

161

20-Aug-2015

13:24

wpfgfx_v0300.dll

3.0.6920.8773

1,737,888

30-Mar-2017

13:15

system.data.dll

2.0.50727.8762

2,975,744

22-Apr-2017

13:09

system.printing.dll

3.0.6920.8773

372,736

30-Mar-2017

13:15

system.web.dll

2.0.50727.8762

5,287,936

22-Apr-2017

13:09

penimc.dll

3.0.6920.8773

68,752

30-Mar-2017

13:15

presentationframework.dll

3.0.6920.8773

5,283,840

30-Mar-2017

13:15

presentationhostdll.dll

3.0.6920.8773

131,248

30-Mar-2017

13:15

reachframework.dll

3.0.6920.8773

532,480

30-Mar-2017

13:15

windowsbase.dll

3.0.6920.8773

1,257,472

30-Mar-2017

13:15

For all x64-based systems

File name

File version

File size

Date

Time

big5.nlp

66,728

22-Apr-2017

13:08

bopomofo.nlp

82,172

22-Apr-2017

13:08

ksc.nlp

116,756

22-Apr-2017

13:08

mscorlib.dll

2.0.50727.8762

4,571,136

22-Apr-2017

13:08

normidna.nlp

59,342

22-Apr-2017

13:08

normnfc.nlp

45,794

22-Apr-2017

13:08

normnfd.nlp

39,284

22-Apr-2017

13:08

normnfkc.nlp

66,384

22-Apr-2017

13:08

normnfkd.nlp

60,294

22-Apr-2017

13:08

prc.nlp

83,748

22-Apr-2017

13:08

prcp.nlp

83,748

22-Apr-2017

13:08

sortkey.nlp

262,148

22-Apr-2017

13:08

sorttbls.nlp

20,320

22-Apr-2017

13:08

xjis.nlp

28,288

22-Apr-2017

13:08

aspnet_wp.exe

2.0.50727.8762

43,160

22-Apr-2017

13:08

mscordacwks.dll

2.0.50727.8762

1,757,344

22-Apr-2017

13:08

mscorwks.dll

2.0.50727.8762

10,007,704

22-Apr-2017

13:08

sos.dll

2.0.50727.8762

486,032

22-Apr-2017

13:08

system.management.dll

2.0.50727.8766

389,120

12-Jul-2017

13:08

system.runtime.remoting.dll

2.0.50727.8771

307,200

31-Aug-2017

13:15

system.security.dll

2.0.50727.8759

270,336

30-Mar-2017

13:15

system.web.regularexpressions.dll

2.0.50727.8762

98,304

22-Apr-2017

13:08

system.dll

2.0.50727.8770

3,203,072

31-Aug-2017

13:15

webengine.dll

2.0.50727.8762

746,648

22-Apr-2017

13:08

wminet_utils.dll

2.0.50727.8766

140,960

12-Jul-2017

13:08

presentationcore.dll

3.0.6920.8773

4,006,400

30-Mar-2017

13:15

presentationfontcache.exe.config

161

22-Aug-2015

13:27

wpfgfx_v0300.dll

3.0.6920.8773

2,256,032

30-Mar-2017

13:15

system.data.dll

2.0.50727.8762

3,150,336

22-Apr-2017

13:08

system.printing.dll

3.0.6920.8773

358,400

30-Mar-2017

13:15

system.web.dll

2.0.50727.8762

5,296,128

22-Apr-2017

13:08

penimc.dll

3.0.6920.8773

85,648

30-Mar-2017

13:15

presentationframework.dll

3.0.6920.8773

4,640,768

30-Mar-2017

13:15

presentationhostdll.dll

3.0.6920.8773

172,208

30-Mar-2017

13:15

reachframework.dll

3.0.6920.8773

532,480

30-Mar-2017

13:15

windowsbase.dll

3.0.6920.8773

1,118,208

30-Mar-2017

13:15

presentationframework.dll

3.0.6920.8773

5,283,840

30-Mar-2017

13:15

reachframework.dll

3.0.6920.8773

532,480

30-Mar-2017

13:15

system.management.dll

2.0.50727.8766

389,120

12-Jul-2017

13:11

system.runtime.remoting.dll

2.0.50727.8771

307,200

31-Aug-2017

13:17

system.security.dll

2.0.50727.8759

270,336

30-Mar-2017

13:14

system.web.regularexpressions.dll

2.0.50727.8762

98,304

22-Apr-2017

13:09

system.dll

2.0.50727.8770

3,203,072

31-Aug-2017

13:17

windowsbase.dll

3.0.6920.8773

1,257,472

30-Mar-2017

13:15

big5.nlp

66,728

23-Sep-2015

13:34

bopomofo.nlp

82,172

23-Sep-2015

13:34

ksc.nlp

116,756

23-Sep-2015

13:34

mscorlib.dll

2.0.50727.8762

4,554,752

22-Apr-2017

13:09

normidna.nlp

59,342

23-Sep-2015

13:34

normnfc.nlp

45,794

23-Sep-2015

13:34

normnfd.nlp

39,284

23-Sep-2015

13:34

normnfkc.nlp

66,384

23-Sep-2015

13:34

normnfkd.nlp

60,294

23-Sep-2015

13:34

prc.nlp

83,748

23-Sep-2015

13:34

prcp.nlp

83,748

23-Sep-2015

13:34

sortkey.nlp

262,148

23-Sep-2015

13:34

sorttbls.nlp

20,320

23-Sep-2015

13:34

xjis.nlp

28,288

23-Sep-2015

13:34

aspnet_wp.exe

2.0.50727.8762

31,384

22-Apr-2017

13:09

mscordacwks.dll

2.0.50727.8762

990,368

22-Apr-2017

13:09

mscorwks.dll

2.0.50727.8762

5,946,520

22-Apr-2017

13:09

sos.dll

2.0.50727.8762

389,776

22-Apr-2017

13:09

webengine.dll

2.0.50727.8762

437,400

22-Apr-2017

13:09

wminet_utils.dll

2.0.50727.8766

116,896

12-Jul-2017

13:11

presentationcore.dll

3.0.6920.8773

4,222,976

30-Mar-2017

13:15

presentationfontcache.exe.config

161

20-Aug-2015

13:24

wpfgfx_v0300.dll

3.0.6920.8773

1,737,888

30-Mar-2017

13:15

system.data.dll

2.0.50727.8762

2,975,744

22-Apr-2017

13:09

system.printing.dll

3.0.6920.8773

372,736

30-Mar-2017

13:15

system.web.dll

2.0.50727.8762

5,287,936

22-Apr-2017

13:09

penimc.dll

3.0.6920.8773

68,752

30-Mar-2017

13:15

presentationframework.dll

3.0.6920.8773

5,283,840

30-Mar-2017

13:15

presentationhostdll.dll

3.0.6920.8773

131,248

30-Mar-2017

13:15

reachframework.dll

3.0.6920.8773

532,480

30-Mar-2017

13:15

windowsbase.dll

3.0.6920.8773

1,257,472

30-Mar-2017

13:15

How to obtain help and support for this security update

Applies to

This article applies to the following:

  • Microsoft .NET Framework 3.5 when used with:

    • Windows Server 2012 R2

    • Windows RT 8.1

    • Windows 8.1

Need more help?

Expand your skills
Explore Training
Get new features first
Join Microsoft Insiders

Was this information helpful?

What affected your experience?

Thank you for your feedback!

×