Applies to:

Microsoft .NET Framework 3.5

Summary

Denial of service vulnerabilities exist when .NET Framework improperly handles objects in heap memory, or when .NET Framework and .NET Core improperly process RegEx strings.

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

Important

  • All updates for Windows 8.1, Windows RT 8.1, and Windows Server 2012 R2 require that update KB 2919355 is installed. We recommend that you install update KB 2919355 on your Windows 8.1-based, Windows RT 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.

Additional information about this update

For more information about this update as it relates to its particular Windows version(s), see the following article(s) in the Microsoft Knowledge Base:

  • 4499408 Security and Quality Rollup for .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows 8.1, RT 8.1, and Server 2012 R2 (KB4499408)

How to obtain and install the update

Method 1: Windows Update

This update is available through Windows Update. When you turn on automatic updating, this update will be 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 standalone 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. You must install the ActiveX control to continue.

  5. After the ActiveX control is installed, you see the Microsoft Update Catalog screen. Type 4499408 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, selectImport.

  9. After the packages are imported, selectClose 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:

20190514 Security update deployment information: May 14, 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 4487080 and 4487258.

File information

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the 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 the times may change when you perform certain operations on the files.

Note: The MANIFEST files (.manifest) and MUM files (.mum) that are installed are not listed.

File information

File hash information

File name

SHA1 hash

SHA256 hash

Windows8.1-KB4495608-x64.msu

4AB9980C231E5F410CEF05BACF9790945BBDF1C3

84FA786740F3EDA109C480CD5715C2A0640AC170D39A31C973BA005DF26AED7D

Windows8.1-KB4495608-x86.msu

FA161CBD35302AC9777C3D222F87A00513B6023F

4394FEA15C3A2BDC6A5BD673C161BB968CAE04ADAD75F570F45CF3AC279F418B

For all supported x64-based versions

File name

File version

File size

Date

Time

big5.nlp

66,728

07-Nov-2017

17:43

bopomofo.nlp

82,172

07-Nov-2017

17:43

ksc.nlp

116,756

07-Nov-2017

17:43

mscorlib.dll

2.0.50727.8806

4,575,232

29-Mar-2019

13:19

normidna.nlp

59,342

07-Nov-2017

17:43

normnfc.nlp

45,794

07-Nov-2017

17:43

normnfd.nlp

39,284

07-Nov-2017

17:43

normnfkc.nlp

66,384

07-Nov-2017

17:43

normnfkd.nlp

60,294

07-Nov-2017

17:43

prc.nlp

83,748

07-Nov-2017

17:43

prcp.nlp

83,748

07-Nov-2017

17:43

sortkey.nlp

262,148

07-Nov-2017

17:43

sorttbls.nlp

20,320

07-Nov-2017

17:43

xjis.nlp

28,288

07-Nov-2017

17:43

aspnet_wp.exe

2.0.50727.8762

43,160

22-Apr-2017

13:08

mscordacwks.dll

2.0.50727.8806

1,757,336

29-Mar-2019

13:19

mscorsvc.dll

2.0.50727.8793

495,232

24-Jul-2018

13:11

mscorwks.dll

2.0.50727.8806

10,007,192

29-Mar-2019

13:19

sos.dll

2.0.50727.8806

486,040

29-Mar-2019

13:19

system.data.sqlxml.dll

2.0.50727.8773

745,472

29-Nov-2017

05:34

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

2.0.50727.8784

274,432

28-Mar-2018

13:15

system.web.regularexpressions.dll

2.0.50727.8762

98,304

22-Apr-2017

13:08

system.xml.dll

2.0.50727.8773

2,056,192

29-Nov-2017

05:34

system.dll

2.0.50727.8806

3,211,264

29-Mar-2019

13:19

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

system.web.extensions.dll

3.5.30729.8814

1,282,048

03-Nov-2018

13:13

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

servicemonikersupport.dll

3.0.4506.8803

20,144

17-Jul-2018

13:12

smdiagnostics.dll

3.0.4506.8803

94,208

17-Jul-2018

13:12

smsvchost.exe

3.0.4506.8803

117,376

17-Jul-2018

13:12

system.identitymodel.dll

3.0.4506.8803

405,504

17-Jul-2018

13:12

system.runtime.serialization.dll

3.0.4506.8803

847,872

17-Jul-2018

13:12

system.runtime.serialization.dll

3.0.4506.8803

847,872

17-Jul-2018

13:12

system.servicemodel.dll

3.0.4506.8803

5,337,088

17-Jul-2018

13:12

system.servicemodel.washosting.dll

3.0.4506.8803

32,768

17-Jul-2018

13:12

system.servicemodel.dll

3.0.4506.8803

5,337,088

17-Jul-2018

13:12

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

system.workflow.activities.dll

3.0.4203.8818

1,060,864

20-Dec-2018

18:27

system.workflow.componentmodel.dll

3.0.4203.8818

1,527,808

20-Dec-2018

18:27

system.workflow.runtime.dll

3.0.4203.8818

454,656

20-Dec-2018

18:27

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

smdiagnostics.dll

3.0.4506.8803

110,592

17-Jul-2018

13:13

smsvchost.exe

3.0.4506.8803

129,664

17-Jul-2018

13:13

system.data.sqlxml.dll

2.0.50727.8773

745,472

12-Dec-2017

13:09

system.identitymodel.dll

3.0.4506.8803

446,464

17-Jul-2018

13:13

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.runtime.serialization.dll

3.0.4506.8803

970,752

17-Jul-2018

13:13

system.runtime.serialization.dll

3.0.4506.8803

970,752

17-Jul-2018

13:13

system.security.dll

2.0.50727.8784

274,432

28-Mar-2018

13:15

system.servicemodel.dll

3.0.4506.8803

5,996,544

17-Jul-2018

13:13

system.servicemodel.washosting.dll

3.0.4506.8803

32,768

17-Jul-2018

13:13

system.servicemodel.dll

3.0.4506.8803

5,996,544

17-Jul-2018

13:13

system.web.extensions.dll

3.5.30729.8814

1,282,048

02-Nov-2018

13:14

system.web.regularexpressions.dll

2.0.50727.8762

98,304

22-Apr-2017

13:09

system.workflow.activities.dll

3.0.4203.8818

1,142,784

23-Dec-2018

14:11

system.workflow.componentmodel.dll

3.0.4203.8818

1,634,304

23-Dec-2018

14:11

system.workflow.runtime.dll

3.0.4203.8818

540,672

23-Dec-2018

14:11

system.xml.dll

2.0.50727.8773

2,056,192

12-Dec-2017

13:09

system.dll

2.0.50727.8806

3,211,264

29-Mar-2019

13:17

windowsbase.dll

3.0.6920.8773

1,257,472

30-Mar-2017

13:15

big5.nlp

66,728

27-Oct-2017

23:27

bopomofo.nlp

82,172

27-Oct-2017

23:27

ksc.nlp

116,756

27-Oct-2017

23:27

mscorlib.dll

2.0.50727.8806

4,558,848

29-Mar-2019

13:17

normidna.nlp

59,342

27-Oct-2017

23:27

normnfc.nlp

45,794

27-Oct-2017

23:27

normnfd.nlp

39,284

27-Oct-2017

23:27

normnfkc.nlp

66,384

27-Oct-2017

23:27

normnfkd.nlp

60,294

27-Oct-2017

23:27

prc.nlp

83,748

27-Oct-2017

23:27

prcp.nlp

83,748

27-Oct-2017

23:27

sortkey.nlp

262,148

27-Oct-2017

23:27

sorttbls.nlp

20,320

27-Oct-2017

23:27

xjis.nlp

28,288

27-Oct-2017

23:27

aspnet_wp.exe

2.0.50727.8762

31,384

22-Apr-2017

13:09

mscordacwks.dll

2.0.50727.8806

990,360

29-Mar-2019

13:17

mscorsvc.dll

2.0.50727.8793

231,992

24-Jul-2018

13:10

mscorwks.dll

2.0.50727.8806

5,947,032

29-Mar-2019

13:17

sos.dll

2.0.50727.8806

389,784

29-Mar-2019

13:17

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

system.web.extensions.dll

3.5.30729.8814

1,282,048

02-Nov-2018

13:14

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

servicemonikersupport.dll

3.0.4506.8803

18,096

17-Jul-2018

13:13

system.identitymodel.dll

3.0.4506.8803

446,464

17-Jul-2018

13:13

system.runtime.serialization.dll

3.0.4506.8803

970,752

17-Jul-2018

13:13

system.servicemodel.dll

3.0.4506.8803

5,996,544

17-Jul-2018

13:13

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

system.workflow.activities.dll

3.0.4203.8818

1,142,784

23-Dec-2018

14:11

system.workflow.componentmodel.dll

3.0.4203.8818

1,634,304

23-Dec-2018

14:11

system.workflow.runtime.dll

3.0.4203.8818

540,672

23-Dec-2018

14:11

For all supported x86-based versions

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

smdiagnostics.dll

3.0.4506.8803

110,592

17-Jul-2018

13:13

smsvchost.exe

3.0.4506.8803

129,664

17-Jul-2018

13:13

system.data.sqlxml.dll

2.0.50727.8773

745,472

12-Dec-2017

13:09

system.identitymodel.dll

3.0.4506.8803

446,464

17-Jul-2018

13:13

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.runtime.serialization.dll

3.0.4506.8803

970,752

17-Jul-2018

13:13

system.runtime.serialization.dll

3.0.4506.8803

970,752

17-Jul-2018

13:13

system.security.dll

2.0.50727.8784

274,432

28-Mar-2018

13:15

system.servicemodel.dll

3.0.4506.8803

5,996,544

17-Jul-2018

13:13

system.servicemodel.washosting.dll

3.0.4506.8803

32,768

17-Jul-2018

13:13

system.servicemodel.dll

3.0.4506.8803

5,996,544

17-Jul-2018

13:13

system.web.extensions.dll

3.5.30729.8814

1,282,048

02-Nov-2018

13:14

system.web.regularexpressions.dll

2.0.50727.8762

98,304

22-Apr-2017

13:09

system.workflow.activities.dll

3.0.4203.8818

1,142,784

23-Dec-2018

14:11

system.workflow.componentmodel.dll

3.0.4203.8818

1,634,304

23-Dec-2018

14:11

system.workflow.runtime.dll

3.0.4203.8818

540,672

23-Dec-2018

14:11

system.xml.dll

2.0.50727.8773

2,056,192

12-Dec-2017

13:09

system.dll

2.0.50727.8806

3,211,264

29-Mar-2019

13:17

windowsbase.dll

3.0.6920.8773

1,257,472

30-Mar-2017

13:15

big5.nlp

66,728

27-Oct-2017

23:27

bopomofo.nlp

82,172

27-Oct-2017

23:27

ksc.nlp

116,756

27-Oct-2017

23:27

mscorlib.dll

2.0.50727.8806

4,558,848

29-Mar-2019

13:17

normidna.nlp

59,342

27-Oct-2017

23:27

normnfc.nlp

45,794

27-Oct-2017

23:27

normnfd.nlp

39,284

27-Oct-2017

23:27

normnfkc.nlp

66,384

27-Oct-2017

23:27

normnfkd.nlp

60,294

27-Oct-2017

23:27

prc.nlp

83,748

27-Oct-2017

23:27

prcp.nlp

83,748

27-Oct-2017

23:27

sortkey.nlp

262,148

27-Oct-2017

23:27

sorttbls.nlp

20,320

27-Oct-2017

23:27

xjis.nlp

28,288

27-Oct-2017

23:27

aspnet_wp.exe

2.0.50727.8762

31,384

22-Apr-2017

13:09

mscordacwks.dll

2.0.50727.8806

990,360

29-Mar-2019

13:17

mscorsvc.dll

2.0.50727.8793

231,992

24-Jul-2018

13:10

mscorwks.dll

2.0.50727.8806

5,947,032

29-Mar-2019

13:17

sos.dll

2.0.50727.8806

389,784

29-Mar-2019

13:17

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

system.web.extensions.dll

3.5.30729.8814

1,282,048

02-Nov-2018

13:14

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

servicemonikersupport.dll

3.0.4506.8803

18,096

17-Jul-2018

13:13

system.identitymodel.dll

3.0.4506.8803

446,464

17-Jul-2018

13:13

system.runtime.serialization.dll

3.0.4506.8803

970,752

17-Jul-2018

13:13

system.servicemodel.dll

3.0.4506.8803

5,996,544

17-Jul-2018

13:13

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

system.workflow.activities.dll

3.0.4203.8818

1,142,784

23-Dec-2018

14:11

system.workflow.componentmodel.dll

3.0.4203.8818

1,634,304

23-Dec-2018

14:11

system.workflow.runtime.dll

3.0.4203.8818

540,672

23-Dec-2018

14:11

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