Description of the Security Only update for .NET Framework 2.0 SP2 and 3.0 SP2 for Windows Server 2008 SP2 (KB 4457054)

Summary

This security update resolves a vulnerability in Microsoft .NET Framework that could allow remote code execution when .NET Framework processes untrusted input. An attacker who successfully exploits this vulnerability in software by using .NET Framework could take control of an affected system. The 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 with administrative user rights.To exploit the vulnerability, an attacker would first have to convince the user to open a malicious document or application.This security update addresses the vulnerability by correcting how .NET Framework validates untrusted input.To learn more about this vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2018-8421.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 security update

For more information about this security update as it relates to Windows Server 2008 Service Pack 2 (SP2), see the following article in the Microsoft Knowledge Base:4457917 Security Only updates for .NET Framework 2.0 SP2, 3.0 SP2, 4.5.2, and 4.6 for Windows Server 2008 SP2 (KB 4457917)

Known issues

After the September 2018 .NET Framework security update is applied to resolve CVE-2018-8421 (.NET Framework remote code execution vulnerability), SharePoint out-of-the-box workflows stop working.For more information about this known issue, see the following article in the Microsoft Knowledge Base:4465015 SharePoint Workflows stop working after you install .NET security updates for CVE-2018-8421

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.

Method 2: Windows Software Update Services (WSUS)

On your WSUS server, follow these steps:

1. Select Start, selectAdministrative Tools, and then selectMicrosoft Windows Server Update Services 3.0.
2. Expand ComputerName, and then selectAction.
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 ActiveX control is installed, you see the Microsoft Update Catalog screen. Type4457915in theSearchbox, and then selectSearch.
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. 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:20180911 Security update deployment information: September 11, 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
Windows6.0-KB4457054-x86.msu	571359B0B58826221A9DCDC0FBAE7994535F042D	5AD8A716FC748FBB7BF82F40A3DF3C0289D143F962BF0B754575F913500EFF2D
Windows6.0-KB4457054-x64.msu	B4EAB0970D118254A7EB39B46C26EAA2B2987BC4	54E0E33D3EE375E849D616F09A5F46D1AED333229D6B49E31B274AA407CEF7EC
Windows6.0-KB4457054-ia64.msu	4F2B6FEAF038372A4BBE6EF0FFFB5E7B860FC489	813CD57C3C2CC337546BBEB213F1DAD6F702D84A575A6B2F7B2B3CB55428DBA6

File attributes for all supported x86-based systems

The English (United States) version of this update 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.File name	File version	File size	Date	Time
system.workflow.activities.dll	3.0.4203.8811	1,142,784	10-Aug-2018	13:07
system.workflow.componentmodel.dll	3.0.4203.8811	1,630,208	10-Aug-2018	13:07
system.workflow.runtime.dll	3.0.4203.8811	540,672	10-Aug-2018	13:07
system.workflow.activities.dll	3.0.4203.8811	1,142,784	10-Aug-2018	13:07
system.workflow.componentmodel.dll	3.0.4203.8811	1,630,208	10-Aug-2018	13:07
system.workflow.runtime.dll	3.0.4203.8811	540,672	10-Aug-2018	13:07

File attributes for all supported x64-based systems

The English (United States) version of this update 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.File name	File version	File size	Date	Time
system.workflow.activities.dll	3.0.4203.8811	1,060,864	10-Aug-2018	13:07
system.workflow.componentmodel.dll	3.0.4203.8811	1,519,616	10-Aug-2018	13:07
system.workflow.runtime.dll	3.0.4203.8811	454,656	10-Aug-2018	13:07
system.workflow.activities.dll	3.0.4203.8811	1,142,784	10-Aug-2018	13:07
system.workflow.componentmodel.dll	3.0.4203.8811	1,630,208	10-Aug-2018	13:07
system.workflow.runtime.dll	3.0.4203.8811	540,672	10-Aug-2018	13:07
system.workflow.activities.dll	3.0.4203.8811	1,142,784	10-Aug-2018	13:07
system.workflow.componentmodel.dll	3.0.4203.8811	1,630,208	10-Aug-2018	13:07
system.workflow.runtime.dll	3.0.4203.8811	540,672	10-Aug-2018	13:07

File attributes for all supported IA64-based systems

The English (United States) version of this update 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.File name	File version	File size	Date	Time
system.workflow.activities.dll	3.0.4203.8811	1,060,864	10-Aug-2018	13:07
system.workflow.componentmodel.dll	3.0.4203.8811	1,519,616	10-Aug-2018	13:07
system.workflow.runtime.dll	3.0.4203.8811	454,656	10-Aug-2018	13:07
system.workflow.activities.dll	3.0.4203.8811	1,142,784	10-Aug-2018	13:07
system.workflow.componentmodel.dll	3.0.4203.8811	1,630,208	10-Aug-2018	13:07
system.workflow.runtime.dll	3.0.4203.8811	540,672	10-Aug-2018	13:07
system.workflow.activities.dll	3.0.4203.8811	1,142,784	10-Aug-2018	13:07
system.workflow.componentmodel.dll	3.0.4203.8811	1,630,208	10-Aug-2018	13:07
system.workflow.runtime.dll	3.0.4203.8811	540,672	10-Aug-2018	13:07

How to obtain help and support for this security update

• Help for installing updates: Windows Update FAQ
• Help for protecting your Windows-based products and services from viruses and malware: Microsoft Secure
• Local support according to your country: International Support