Description of the security update for SharePoint Server 2019: September 8, 2020

This security update resolves vulnerabilities in Microsoft Office that could allow remote code execution if a user opens a specially crafted Office file. To learn more about these vulnerabilities, see the following security advisories: 

• Microsoft Common Vulnerabilities and Exposures CVE-2020-1198
• Microsoft Common Vulnerabilities and Exposures CVE-2020-1200
• Microsoft Common Vulnerabilities and Exposures CVE-2020-1210
• Microsoft Common Vulnerabilities and Exposures CVE-2020-1218
• Microsoft Common Vulnerabilities and Exposures CVE-2020-1227
• Microsoft Common Vulnerabilities and Exposures CVE-2020-1338
• Microsoft Common Vulnerabilities and Exposures CVE-2020-1345
• Microsoft Common Vulnerabilities and Exposures CVE-2020-1440
• Microsoft Common Vulnerabilities and Exposures CVE-2020-1452
• Microsoft Common Vulnerabilities and Exposures CVE-2020-1453
• Microsoft Common Vulnerabilities and Exposures CVE-2020-1460
• Microsoft Common Vulnerabilities and Exposures CVE-2020-1482
• Microsoft Common Vulnerabilities and Exposures CVE-2020-1514
• Microsoft Common Vulnerabilities and Exposures CVE-2020-1523
• Microsoft Common Vulnerabilities and Exposures CVE-2020-1576
• Microsoft Common Vulnerabilities and Exposures CVE-2020-1595
• Microsoft Common Vulnerabilities and Exposures CVE-2020-1205
• Microsoft Common Vulnerabilities and Exposures CVE-2020-1335

Note To apply this security update, you must have the release version of Microsoft SharePoint Server 2019 installed on the computer.

This security update contains improvements and fixes for the following nonsecurity issues in SharePoint Server 2019:

• Reduces the time to stop application pools.
• Fixes an issue in which restoring a Search service application that has Overwrite type from a full backup fails after the Search service application is deleted.
• Fixes an issue in which the URL redirection occurs to the root instead of the actual resource when a user logs in to SharePoint by using multiple authentication types, such as a Security Assertion Markup Language (SAML) token and a FedAuth cookie, at the same time.
• Fixes an issue in which multiple items are added to the list when you add a new item to a list and select Save multiple times on the Ribbon.
• Fixes a memory leak issue that occurs when you export a site.
• Fixes a potential memory leak.
• Fixes an issue in which multiple columns or rows can't be copied from Excel tables to the list in Quick Edit view.
• Fixes an issue in which the DocumentSharing.svc service is broken and users receive a "403 Access Denied" error message.
• Fixes an issue that generates a high CPU cost when you call search API on an extended web application.
• Fixes an issue in which the library setting that should force opening a document in Word is not honored in classic experience when you use browsers other than Internet Explorer or legacy Edge.

• Issue 1
  
  Users who install SharePoint in non-English languages or install non-English language packs can't work on some modern pages in non-English sites.
  
  Resolution
  
  To fix this issue, install KB 4461512.
• Issue 2
  
  An error occurs when you try to access the "Result Sources," “Query Rules,” “Search Result Sources,” or “Search Query Rules” page from the Search Settings section of Site Settings. 
  
  Resolution
  
  To fix this issue, install KB 4486676.
• Issue 3
  
  After you install this update, some SharePoint ghosted pages don't render, and will generate error messages.
  
  Resolution
  
  To resolve this issue, see KB 4584132.

Method 1: Microsoft Update

This update is available from Microsoft 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: Microsoft Download Center

You can get the standalone update package through the Microsoft Download Center. Follow the installation instructions on the download page to install the update.

• Download security update 4484505 for the 64-bit version of SharePoint Server 2019

Security update deployment information

For deployment information about this update, see security update deployment information: September 8, 2020.

Security update replacement information

This security update replaces previously released security update 4484472.

File hash information

File information

The English (United States) version of this software update installs files that have the attributes that are listed in the following table. 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.