This update is included in the Cumulative Update that is dated February 11, 2020. This update was previously released in the Cumulative Update that was dated January 14, 2020.
Summary
A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly. An attacker who successfully exploited this vulnerability could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. 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.
-
4538123 Description of the 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 Server 2012 (KB4538123)
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 website.
Method 3: 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. You must install the ActiveX control to continue.
-
After the ActiveX control is installed, you see the Microsoft Update Catalog screen. Type 4538123 into 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 require, 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:
20200114 Security update deployment information: January 14, 2020
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 4533096, 4535673.
File information The English (United States) version of this software update installs files that have the attributes that are listed in the following tables.Windows Server 2012 file information
Note:Â 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-KB4532943-x64.msu |
2BCCCDBBD314694477FD8157F025A3DC47225EDC |
0473EC97F06766264FF9F1CE257A73B8091CE89DA71808D885D009DE22ADBB82 |
For all supported x64-based versions
|
File name |
File version |
File size |
Date |
Time |
Platform |
SP requirement |
Service branch |
|
Big5.nlp |
Not applicable |
66,728 |
04-May-2018 |
19:43 |
Not applicable |
None |
Not applicable |
|
Bopomofo.nlp |
Not applicable |
82,172 |
04-May-2018 |
19:43 |
Not applicable |
None |
Not applicable |
|
Ksc.nlp |
Not applicable |
116,756 |
04-May-2018 |
19:43 |
Not applicable |
None |
Not applicable |
|
Mscorlib.dll |
2.0.50727.8810 |
4,575,232 |
27-Jul-2019 |
13:06 |
x64 |
None |
Not applicable |
|
Normidna.nlp |
Not applicable |
59,342 |
04-May-2018 |
19:43 |
Not applicable |
None |
Not applicable |
|
Normnfc.nlp |
Not applicable |
45,794 |
04-May-2018 |
19:43 |
Not applicable |
None |
Not applicable |
|
Normnfd.nlp |
Not applicable |
39,284 |
04-May-2018 |
19:43 |
Not applicable |
None |
Not applicable |
|
Normnfkc.nlp |
Not applicable |
66,384 |
04-May-2018 |
19:43 |
Not applicable |
None |
Not applicable |
|
Normnfkd.nlp |
Not applicable |
60,294 |
04-May-2018 |
19:43 |
Not applicable |
None |
Not applicable |
|
Prc.nlp |
Not applicable |
83,748 |
04-May-2018 |
19:43 |
Not applicable |
None |
Not applicable |
|
Prcp.nlp |
Not applicable |
83,748 |
04-May-2018 |
19:43 |
Not applicable |
None |
Not applicable |
|
Sortkey.nlp |
Not applicable |
262,148 |
04-May-2018 |
19:43 |
Not applicable |
None |
Not applicable |
|
Sorttbls.nlp |
Not applicable |
20,320 |
04-May-2018 |
19:43 |
Not applicable |
None |
Not applicable |
|
Xjis.nlp |
Not applicable |
28,288 |
04-May-2018 |
19:43 |
Not applicable |
None |
Not applicable |
|
Aspnet_wp.exe |
2.0.50727.8762 |
43,160 |
07-Apr-2017 |
13:09 |
x64 |
SPN |
AMD64_NETFX-ASP |
|
Mscordacwks.dll |
2.0.50727.8810 |
1,758,080 |
27-Jul-2019 |
13:06 |
x64 |
None |
Not applicable |
|
Mscorsvc.dll |
2.0.50727.8793 |
495,232 |
24-Jul-2018 |
15:10 |
x64 |
None |
Not applicable |
|
Mscorwks.dll |
2.0.50727.8810 |
10,011,520 |
27-Jul-2019 |
13:06 |
x64 |
None |
Not applicable |
|
Sos.dll |
2.0.50727.8810 |
486,784 |
27-Jul-2019 |
13:06 |
x64 |
None |
Not applicable |
|
System.data.sqlxml.dll |
2.0.50727.8773 |
745,472 |
01-Dec-2017 |
13:13 |
x86 |
None |
Not applicable |
|
System.management.dll |
2.0.50727.8766 |
389,120 |
12-Jul-2017 |
13:09 |
x86 |
None |
Not applicable |
|
System.runtime.remoting.dll |
2.0.50727.8771 |
307,200 |
31-Aug-2017 |
13:09 |
x86 |
None |
Not applicable |
|
System.security.dll |
2.0.50727.8784 |
274,432 |
27-Mar-2018 |
17:37 |
x86 |
None |
Not applicable |
|
System.web.regularexpressions.dll |
2.0.50727.8762 |
98,304 |
07-Apr-2017 |
13:09 |
x86 |
None |
Not applicable |
|
System.xml.dll |
2.0.50727.8773 |
2,056,192 |
01-Dec-2017 |
13:13 |
x86 |
None |
Not applicable |
|
System.dll |
2.0.50727.8806 |
3,211,264 |
29-Mar-2019 |
13:06 |
x86 |
None |
Not applicable |
|
Webengine.dll |
2.0.50727.8762 |
746,648 |
07-Apr-2017 |
13:09 |
x64 |
None |
Not applicable |
|
Wminet_utils.dll |
2.0.50727.8766 |
140,960 |
12-Jul-2017 |
13:09 |
x64 |
None |
Not applicable |
|
System.web.extensions.dll |
3.5.30729.8814 |
1,282,048 |
02-Nov-2018 |
13:06 |
x86 |
None |
Not applicable |
|
Presentationcore.dll |
3.0.6920.8833 |
4,006,400 |
07-Dec-2019 |
02:06 |
x64 |
None |
Not applicable |
|
Presentationfontcache.exe.config |
Not applicable |
161 |
04-May-2018 |
19:43 |
Not applicable |
None |
Not applicable |
|
Wpfgfx_v0300.dll |
3.0.6920.8833 |
2,265,888 |
07-Dec-2019 |
02:06 |
x64 |
None |
Not applicable |
|
System.data.dll |
2.0.50727.8762 |
3,150,336 |
06-Apr-2017 |
20:26 |
x64 |
None |
Not applicable |
|
System.printing.dll |
3.0.6920.8833 |
358,400 |
07-Dec-2019 |
02:06 |
x64 |
None |
Not applicable |
|
System.web.dll |
2.0.50727.8762 |
5,296,128 |
07-Apr-2017 |
13:09 |
x64 |
None |
Not applicable |
|
Servicemonikersupport.dll |
3.0.4506.8831 |
29,968 |
03-Jul-2019 |
22:15 |
x64 |
None |
Not applicable |
|
Smdiagnostics.dll |
3.0.4506.8831 |
94,208 |
03-Jul-2019 |
22:15 |
x86 |
None |
Not applicable |
|
Smsvchost.exe |
3.0.4506.8831 |
127,272 |
03-Jul-2019 |
22:15 |
x86 |
None |
Not applicable |
|
System.identitymodel.dll |
3.0.4506.8831 |
405,504 |
03-Jul-2019 |
22:15 |
x86 |
None |
Not applicable |
|
System.runtime.serialization.dll |
3.0.4506.8831 |
847,872 |
03-Jul-2019 |
22:15 |
x86 |
None |
Not applicable |
|
System.runtime.serialization.dll |
3.0.4506.8831 |
847,872 |
03-Jul-2019 |
22:15 |
x86 |
None |
Not applicable |
|
System.servicemodel.dll |
3.0.4506.8831 |
5,337,088 |
03-Jul-2019 |
22:15 |
x86 |
None |
Not applicable |
|
System.servicemodel.washosting.dll |
3.0.4506.8831 |
32,768 |
03-Jul-2019 |
22:15 |
x86 |
None |
Not applicable |
|
System.servicemodel.dll |
3.0.4506.8831 |
5,337,088 |
03-Jul-2019 |
22:15 |
x86 |
None |
Not applicable |
|
Penimc.dll |
3.0.6920.8833 |
95,728 |
07-Dec-2019 |
02:06 |
x64 |
None |
Not applicable |
|
Presentationframework.dll |
3.0.6920.8833 |
4,648,960 |
07-Dec-2019 |
02:06 |
x86 |
None |
Not applicable |
|
Presentationhostdll.dll |
3.0.6920.8833 |
182,048 |
07-Dec-2019 |
02:06 |
x64 |
None |
Not applicable |
|
Reachframework.dll |
3.0.6920.8833 |
536,576 |
07-Dec-2019 |
02:06 |
x86 |
None |
Not applicable |
|
Windowsbase.dll |
3.0.6920.8833 |
1,118,208 |
07-Dec-2019 |
02:06 |
x86 |
None |
Not applicable |
|
System.workflow.activities.dll |
3.0.4203.8833 |
1,060,864 |
07-Dec-2019 |
02:06 |
x86 |
None |
Not applicable |
|
System.workflow.componentmodel.dll |
3.0.4203.8833 |
1,531,904 |
07-Dec-2019 |
02:06 |
x86 |
None |
Not applicable |
|
System.workflow.runtime.dll |
3.0.4203.8833 |
454,656 |
07-Dec-2019 |
02:06 |
x86 |
None |
Not applicable |
|
Presentationframework.dll |
3.0.6920.8833 |
5,292,032 |
07-Dec-2019 |
02:06 |
x86 |
None |
Not applicable |
|
Reachframework.dll |
3.0.6920.8833 |
536,576 |
07-Dec-2019 |
02:06 |
x86 |
None |
Not applicable |
|
Smdiagnostics.dll |
3.0.4506.8831 |
110,592 |
03-Jul-2019 |
22:14 |
x86 |
None |
Not applicable |
|
Smsvchost.exe |
3.0.4506.8831 |
139,560 |
03-Jul-2019 |
22:14 |
x86 |
None |
Not applicable |
|
System.data.sqlxml.dll |
2.0.50727.8773 |
745,472 |
01-Dec-2017 |
13:05 |
x86 |
None |
Not applicable |
|
System.identitymodel.dll |
3.0.4506.8831 |
446,464 |
03-Jul-2019 |
22:14 |
x86 |
None |
Not applicable |
|
System.management.dll |
2.0.50727.8766 |
389,120 |
12-Jul-2017 |
13:09 |
x86 |
None |
Not applicable |
|
System.runtime.remoting.dll |
2.0.50727.8771 |
307,200 |
31-Aug-2017 |
13:08 |
x86 |
None |
Not applicable |
|
System.runtime.serialization.dll |
3.0.4506.8831 |
970,752 |
03-Jul-2019 |
22:14 |
x86 |
None |
Not applicable |
|
System.runtime.serialization.dll |
3.0.4506.8831 |
970,752 |
03-Jul-2019 |
22:14 |
x86 |
None |
Not applicable |
|
System.security.dll |
2.0.50727.8784 |
274,432 |
27-Mar-2018 |
17:37 |
x86 |
None |
Not applicable |
|
System.servicemodel.dll |
3.0.4506.8831 |
5,996,544 |
03-Jul-2019 |
22:14 |
x86 |
None |
Not applicable |
|
System.servicemodel.washosting.dll |
3.0.4506.8831 |
32,768 |
03-Jul-2019 |
22:14 |
x86 |
None |
Not applicable |
|
System.servicemodel.dll |
3.0.4506.8831 |
5,996,544 |
03-Jul-2019 |
22:14 |
x86 |
None |
Not applicable |
|
System.web.extensions.dll |
3.5.30729.8814 |
1,282,048 |
02-Nov-2018 |
13:06 |
x86 |
None |
Not applicable |
|
System.web.regularexpressions.dll |
2.0.50727.8762 |
98,304 |
07-Apr-2017 |
13:09 |
x86 |
None |
Not applicable |
|
System.workflow.activities.dll |
3.0.4203.8833 |
1,142,784 |
07-Dec-2019 |
02:06 |
x86 |
None |
Not applicable |
|
System.workflow.componentmodel.dll |
3.0.4203.8833 |
1,638,400 |
07-Dec-2019 |
02:06 |
x86 |
None |
Not applicable |
|
System.workflow.runtime.dll |
3.0.4203.8833 |
540,672 |
07-Dec-2019 |
02:06 |
x86 |
None |
Not applicable |
|
System.xml.dll |
2.0.50727.8773 |
2,056,192 |
01-Dec-2017 |
13:05 |
x86 |
None |
Not applicable |
|
System.dll |
2.0.50727.8806 |
3,211,264 |
02-Apr-2019 |
19:25 |
x86 |
None |
Not applicable |
|
Windowsbase.dll |
3.0.6920.8833 |
1,257,472 |
07-Dec-2019 |
02:06 |
x86 |
None |
Not applicable |
|
Big5.nlp |
Not applicable |
66,728 |
15-Nov-2017 |
00:49 |
Not applicable |
None |
Not applicable |
|
Bopomofo.nlp |
Not applicable |
82,172 |
15-Nov-2017 |
00:49 |
Not applicable |
None |
Not applicable |
|
Ksc.nlp |
Not applicable |
116,756 |
15-Nov-2017 |
00:49 |
Not applicable |
None |
Not applicable |
|
Mscorlib.dll |
2.0.50727.8810 |
4,558,848 |
27-Jul-2019 |
13:06 |
x86 |
None |
Not applicable |
|
Normidna.nlp |
Not applicable |
59,342 |
15-Nov-2017 |
00:49 |
Not applicable |
None |
Not applicable |
|
Normnfc.nlp |
Not applicable |
45,794 |
15-Nov-2017 |
00:49 |
Not applicable |
None |
Not applicable |
|
Normnfd.nlp |
Not applicable |
39,284 |
15-Nov-2017 |
00:49 |
Not applicable |
None |
Not applicable |
|
Normnfkc.nlp |
Not applicable |
66,384 |
15-Nov-2017 |
00:49 |
Not applicable |
None |
Not applicable |
|
Normnfkd.nlp |
Not applicable |
60,294 |
15-Nov-2017 |
00:49 |
Not applicable |
None |
Not applicable |
|
Prc.nlp |
Not applicable |
83,748 |
15-Nov-2017 |
00:49 |
Not applicable |
None |
Not applicable |
|
Prcp.nlp |
Not applicable |
83,748 |
15-Nov-2017 |
00:49 |
Not applicable |
None |
Not applicable |
|
Sortkey.nlp |
Not applicable |
262,148 |
15-Nov-2017 |
00:49 |
Not applicable |
None |
Not applicable |
|
Sorttbls.nlp |
Not applicable |
20,320 |
15-Nov-2017 |
00:49 |
Not applicable |
None |
Not applicable |
|
Xjis.nlp |
Not applicable |
28,288 |
15-Nov-2017 |
00:49 |
Not applicable |
None |
Not applicable |
|
Aspnet_wp.exe |
2.0.50727.8762 |
31,384 |
07-Apr-2017 |
13:09 |
x86 |
SPN |
X86_NETFX-ASP |
|
Mscordacwks.dll |
2.0.50727.8810 |
991,104 |
27-Jul-2019 |
13:06 |
x86 |
None |
Not applicable |
|
Mscorsvc.dll |
2.0.50727.8793 |
231,992 |
24-Jul-2018 |
15:10 |
x86 |
None |
Not applicable |
|
Mscorwks.dll |
2.0.50727.8810 |
5,949,832 |
27-Jul-2019 |
13:06 |
x86 |
None |
Not applicable |
|
Sos.dll |
2.0.50727.8810 |
390,536 |
27-Jul-2019 |
13:06 |
x86 |
None |
Not applicable |
|
Webengine.dll |
2.0.50727.8762 |
437,400 |
07-Apr-2017 |
13:09 |
x86 |
None |
Not applicable |
|
Wminet_utils.dll |
2.0.50727.8766 |
116,896 |
12-Jul-2017 |
13:09 |
x86 |
None |
Not applicable |
|
System.web.extensions.dll |
3.5.30729.8814 |
1,282,048 |
02-Nov-2018 |
13:06 |
x86 |
None |
Not applicable |
|
Presentationcore.dll |
3.0.6920.8833 |
4,222,976 |
07-Dec-2019 |
02:06 |
x86 |
None |
Not applicable |
|
Presentationfontcache.exe.config |
Not applicable |
161 |
15-Nov-2017 |
00:51 |
Not applicable |
None |
Not applicable |
|
Wpfgfx_v0300.dll |
3.0.6920.8833 |
1,747,952 |
07-Dec-2019 |
02:06 |
x86 |
None |
Not applicable |
|
System.data.dll |
2.0.50727.8762 |
2,975,744 |
06-Apr-2017 |
20:26 |
x86 |
None |
Not applicable |
|
System.printing.dll |
3.0.6920.8833 |
372,736 |
07-Dec-2019 |
02:06 |
x86 |
None |
Not applicable |
|
System.web.dll |
2.0.50727.8762 |
5,287,936 |
07-Apr-2017 |
13:09 |
x86 |
None |
Not applicable |
|
Servicemonikersupport.dll |
3.0.4506.8831 |
27,920 |
03-Jul-2019 |
22:14 |
x86 |
None |
Not applicable |
|
System.identitymodel.dll |
3.0.4506.8831 |
446,464 |
03-Jul-2019 |
22:14 |
x86 |
None |
Not applicable |
|
System.runtime.serialization.dll |
3.0.4506.8831 |
970,752 |
03-Jul-2019 |
22:14 |
x86 |
None |
Not applicable |
|
System.servicemodel.dll |
3.0.4506.8831 |
5,996,544 |
03-Jul-2019 |
22:14 |
x86 |
None |
Not applicable |
|
Penimc.dll |
3.0.6920.8833 |
78,624 |
07-Dec-2019 |
02:06 |
x86 |
None |
Not applicable |
|
Presentationframework.dll |
3.0.6920.8833 |
5,292,032 |
07-Dec-2019 |
02:06 |
x86 |
None |
Not applicable |
|
Presentationhostdll.dll |
3.0.6920.8833 |
141,288 |
07-Dec-2019 |
02:06 |
x86 |
None |
Not applicable |
|
Reachframework.dll |
3.0.6920.8833 |
536,576 |
07-Dec-2019 |
02:06 |
x86 |
None |
Not applicable |
|
Windowsbase.dll |
3.0.6920.8833 |
1,257,472 |
07-Dec-2019 |
02:06 |
x86 |
None |
Not applicable |
|
System.workflow.activities.dll |
3.0.4203.8833 |
1,142,784 |
07-Dec-2019 |
02:06 |
x86 |
None |
Not applicable |
|
System.workflow.componentmodel.dll |
3.0.4203.8833 |
1,638,400 |
07-Dec-2019 |
02:06 |
x86 |
None |
Not applicable |
|
System.workflow.runtime.dll |
3.0.4203.8833 |
540,672 |
07-Dec-2019 |
02:06 |
x86 |
None |
Not applicable |
Information about protection and security
-
Protect yourself online: Windows Security support
-
Learn how we guard against cyber threats: Microsoft Security
