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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

  • 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:.

  • 4498962 Security Only Update 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 Server 2012 (KB4498962)

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 4498962 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:

20190514 Security update deployment information: February 12, 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 update 4481483.

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-RT-KB4495607-x64.msu

D57B31B95AC9D97BD85D9FF4A58EEEC730A57676

DA4954CB2AF76B0FFB29981AE0BBDF39BF9D0A9C94513C6277A6669485DCB6E6

Windows8-RT-KB4495607-x86.msu

BF855D48011FB274ADFFB9EB5E7C0BFCE871595F

9AB8DC7C2F5548581C8BA7AB882C913BD6BA7004244DDC2D92039C1E44873C4F

For all supported x64-based versions

File name

File version

File size

Date

Time

big5.nlp

66,728

04-May-2018

19:43

bopomofo.nlp

82,172

04-May-2018

19:43

ksc.nlp

116,756

04-May-2018

19:43

mscorlib.dll

2.0.50727.8806

4,575,232

29-Mar-2019

13:06

normidna.nlp

59,342

04-May-2018

19:43

normnfc.nlp

45,794

04-May-2018

19:43

normnfd.nlp

39,284

04-May-2018

19:43

normnfkc.nlp

66,384

04-May-2018

19:43

normnfkd.nlp

60,294

04-May-2018

19:43

prc.nlp

83,748

04-May-2018

19:43

prcp.nlp

83,748

04-May-2018

19:43

sortkey.nlp

262,148

04-May-2018

19:43

sorttbls.nlp

20,320

04-May-2018

19:43

xjis.nlp

28,288

04-May-2018

19:43

mscordacwks.dll

2.0.50727.8806

1,757,336

29-Mar-2019

13:06

mscorwks.dll

2.0.50727.8806

10,007,192

29-Mar-2019

13:06

sos.dll

2.0.50727.8806

486,040

29-Mar-2019

13:06

system.dll

2.0.50727.8806

3,211,264

29-Mar-2019

13:06

system.dll

2.0.50727.8806

3,211,264

02-Apr-2019

19:25

big5.nlp

66,728

15-Nov-2017

00:49

bopomofo.nlp

82,172

15-Nov-2017

00:49

ksc.nlp

116,756

15-Nov-2017

00:49

mscorlib.dll

2.0.50727.8806

4,558,848

02-Apr-2019

19:25

normidna.nlp

59,342

15-Nov-2017

00:49

normnfc.nlp

45,794

15-Nov-2017

00:49

normnfd.nlp

39,284

15-Nov-2017

00:49

normnfkc.nlp

66,384

15-Nov-2017

00:49

normnfkd.nlp

60,294

15-Nov-2017

00:49

prc.nlp

83,748

15-Nov-2017

00:49

prcp.nlp

83,748

15-Nov-2017

00:49

sortkey.nlp

262,148

15-Nov-2017

00:49

sorttbls.nlp

20,320

15-Nov-2017

00:49

xjis.nlp

28,288

15-Nov-2017

00:49

mscordacwks.dll

2.0.50727.8806

990,360

02-Apr-2019

19:25

mscorwks.dll

2.0.50727.8806

5,947,032

02-Apr-2019

19:25

sos.dll

2.0.50727.8806

389,784

02-Apr-2019

19:25

For all supported x86-based versions

File name

File version

File size

Date

Time

system.dll

2.0.50727.8806

3,211,264

02-Apr-2019

19:25

big5.nlp

66,728

15-Nov-2017

00:49

bopomofo.nlp

82,172

15-Nov-2017

00:49

ksc.nlp

116,756

15-Nov-2017

00:49

mscorlib.dll

2.0.50727.8806

4,558,848

02-Apr-2019

19:25

normidna.nlp

59,342

15-Nov-2017

00:49

normnfc.nlp

45,794

15-Nov-2017

00:49

normnfd.nlp

39,284

15-Nov-2017

00:49

normnfkc.nlp

66,384

15-Nov-2017

00:49

normnfkd.nlp

60,294

15-Nov-2017

00:49

prc.nlp

83,748

15-Nov-2017

00:49

prcp.nlp

83,748

15-Nov-2017

00:49

sortkey.nlp

262,148

15-Nov-2017

00:49

sorttbls.nlp

20,320

15-Nov-2017

00:49

xjis.nlp

28,288

15-Nov-2017

00:49

mscordacwks.dll

2.0.50727.8806

990,360

02-Apr-2019

19:25

mscorwks.dll

2.0.50727.8806

5,947,032

02-Apr-2019

19:25

sos.dll

2.0.50727.8806

389,784

02-Apr-2019

19:25

Information about protection and security

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