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mskbMicrosoftKB4344167
HistoryAug 14, 2018 - 7:00 a.m.

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 7 SP1 and Server 2008 R2 SP1, and for .NET Framework 4.6 for Server 2008 SP2 (KB 4344167)

2018-08-1407:00:00
Microsoft
support.microsoft.com
8

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

8 High

AI Score

Confidence

High

7.2 High

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:C/I:C/A:C

0.027 Low

EPSS

Percentile

90.2%

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 7 SP1 and Server 2008 R2 SP1, and for .NET Framework 4.6 for Server 2008 SP2 (KB 4344167)

Summary

This security update resolves an information disclosure vulnerability in Microsoft .NET Framework that could allow an attacker to access information in multi-tenant environments. The vulnerability is caused when .NET Framework is used in high-load/high-density network connections in which content from one stream can blend into another stream.To exploit the vulnerability, an attacker who can access one tenant in a high-load/high-density environment could potentially trigger multi-tenanted data exposure from one customer to another.This security update addresses the vulnerability by correcting the way that .NET Framework handles high-load/high-density network connections.To learn more about this vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2018-8360.Important

  • All updates for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7.1, and 4.7.2 require the d3dcompiler_47.dll update to be 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 update, see KB 4019990 for Windows 7 SP1 and Windows Server 2008 R2 SP1. Or, see KB 4019478 for Windows Server 2008 SP2.
  • 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 7 Service Pack 1 (SP1) and Windows Server 2008 R2 SP1, see the following article in the Microsoft Knowledge Base:4345679 Security Only updates for .NET Framework 3.5.1, 4.5.2 and 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, and 4.7.2 for Windows 7 SP1 and Server 2008 R2 SP1 (KB 4345679)For more information about this security update as it relates to Windows Server 2008, see the following article in the Microsoft Knowledge Base:4345682 Security Only updates for .NET Framework 2.0 SP2, 3.0 SP2, 4.5.2, and 4.6 for Windows Server 2008 SP2 (KB 4345682)

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.

  • For Windows 7 SP1 and Windows Server 2008 R2 SP1, go to update KB 4345679.
  • For Windows Server 2008, go to update KB 4345682.

Method 2: Windows Software Update Services (WSUS)

On your WSUS server, follow these steps:

  1. Click Start, clickAdministrative Tools, and then clickMicrosoft Windows Server Update Services 3.0.
  2. Expand ComputerName, and then clickAction.
  3. Click 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. Type4345679for Windows 7 SP1 and Windows Server 2008 R2 SP1 or type4345682for Windows Server 2008 SP2 in theSearchbox, and then clickSearch.
  6. Locate the .NET Framework packages that match the operating systems, languages, and processors in your environment. Click Add to add them to your basket.
  7. After you select all the packages that you require, click View Basket.
  8. To import the packages to your WSUS server, click Import.
  9. After the packages are imported, click 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:20180814 Security update deployment information: August 14, 2018

Update removal information

Note We do not recommend that you remove any security update. To remove this update, use thePrograms 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 does not replace any previously released update.

File information

File hash

File name SHA1 hash SHA256 hash
NDP46-KB4344167-x64.exe ADC94283059DB5F102AA2180C73D8570F0EFC9C5 604A497C1BFE532E19F821084391D48852D0E2FF94C62B25A913354B96949DC8
NDP46-KB4344167-x86.exe 0D6D228F87DBA8CA0F37AA3B017B7DD590DE8EF0 3963AB60A34362DFE20EAF85B0125395754FC33CC163B81190AEA17531A0C9EE

File attributes

The English (United States) version of this 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.For all supported x86-based systemsFile name File version File size Date Time
clr.dll 4.7.3133.0 7,249,400 27-Jul-2018 19:16
clrjit.dll 4.7.3133.0 524,288 27-Jul-2018 19:16
mscordacwks.dll 4.7.3133.0 1,345,992 27-Jul-2018 19:16
mscordbi.dll 4.7.3133.0 1,170,440 27-Jul-2018 19:16
mscorlib.dll 4.7.3133.0 5,638,272 27-Jul-2018 19:16
msvcp120_clr0400.dll 12.0.52519.0 485,576 27-Jul-2018 19:20
msvcr120_clr0400.dll 12.0.52519.0 987,840 27-Jul-2018 19:20
peverify.dll 4.7.3133.0 189,960 27-Jul-2018 19:16
SOS.dll 4.7.3133.0 744,952 27-Jul-2018 19:16
System.dll 4.7.3151.0 3,555,872 27-Jul-2018 19:19
For all supported x64-based systemsFile name File version File size Date Time
clr.dll 4.7.3133.0 10,378,664 27-Jul-2018 19:16
clr.dll 4.7.3133.0 7,249,400 27-Jul-2018 19:16
clrjit.dll 4.7.3133.0 1,227,192 27-Jul-2018 19:16
clrjit.dll 4.7.3133.0 524,288 27-Jul-2018 19:16
compatjit.dll 4.7.3133.0 1,262,528 27-Jul-2018 19:16
mscordacwks.dll 4.7.3133.0 1,843,656 27-Jul-2018 19:16
mscordacwks.dll 4.7.3133.0 1,345,992 27-Jul-2018 19:16
mscordbi.dll 4.7.3133.0 1,625,024 27-Jul-2018 19:16
mscordbi.dll 4.7.3133.0 1,170,440 27-Jul-2018 19:16
mscorlib.dll 4.7.3133.0 5,420,992 27-Jul-2018 19:16
mscorlib.dll 4.7.3133.0 5,638,272 27-Jul-2018 19:16
msvcp120_clr0400.dll 12.0.52519.0 690,008 27-Jul-2018 19:35
msvcp120_clr0400.dll 12.0.52519.0 485,576 27-Jul-2018 19:20
msvcr120_clr0400.dll 12.0.52519.0 993,632 27-Jul-2018 19:35
msvcr120_clr0400.dll 12.0.52519.0 987,840 27-Jul-2018 19:20
peverify.dll 4.7.3133.0 263,104 27-Jul-2018 19:16
peverify.dll 4.7.3133.0 189,960 27-Jul-2018 19:16
SOS.dll 4.7.3133.0 874,920 27-Jul-2018 19:16
SOS.dll 4.7.3133.0 744,952 27-Jul-2018 19:16
System.dll 4.7.3151.0 3,555,872 27-Jul-2018 19:19

How to obtain help and support for this security update

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

8 High

AI Score

Confidence

High

7.2 High

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:C/I:C/A:C

0.027 Low

EPSS

Percentile

90.2%