Lucene search

MicrosoftKB4493450

HistoryApr 09, 2019 - 7:00 a.m.

April 9, 2019—KB4493450 (Security-only update)

2019-04-0907:00:00

Microsoft

support.microsoft.com

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

7.4 High

AI Score

Confidence

High

9.3 High

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

0.125 Low

EPSS

Percentile

95.4%

JSON

April 9, 2019—KB4493450 (Security-only update)

Improvements and fixes

This security update includes quality improvements. Key changes include:

Addresses an issue that may cause applications that use MSXML6 to stop responding if an exception was thrown during node operations.
Addresses an issue that causes the Group Policy editor to stop responding when editing a Group Policy Object (GPO) that contains Group Policy Preferences (GPP) for Internet Explorer 10 Internet settings.
Addresses an issue that may cause authentication issues for Internet Explorer 10 and other applications that use WININET.DLL. This occurs when two or more people use the same user account for multiple, concurrent login sessions on the same Windows Server machine, including Remote Desktop Protocol (RDP) and Terminal Server logons.
Addresses an issue that may cause compound document (OLE) server applications to display embedded objects incorrectly if you use the PatBltAPI to place embedded objects into the Windows Metafile (WMF).
Security updates to Windows Storage and Filesystems, Windows Server, Microsoft Graphics Component, Windows Input and Composition, Windows Datacenter Networking, Windows Kernel, Windows MSXML, and the Microsoft JET Database Engine.
For more information about the resolved security vulnerabilities, please refer to the Security Update Guide.

Known issues in this update

Symptom	Workaround
After installing this update, there may be issues using the Preboot Execution Environment (PXE) to start a device from a Windows Deployment Services (WDS) server configured to use Variable Window Extension. This may cause the connection to the WDS server to terminate prematurely while downloading the image. This issue does not affect clients or devices that are not using Variable Window Extension.	This issue is resolved KB4503263.
Microsoft and Sophos have identified an issue on devices with Sophos Endpoint Protection installed and managed by either Sophos Central or Sophos Enterprise Console (SEC) that may cause the system to become unresponsive upon restart after installing this update.	This issue has been resolved. Microsoft has removed the temporary block for all affected Windows updates.Guidance for Sophos Endpoint and Sophos Enterprise Console customers can be found in the Sophos support article.
Microsoft and Avira have identified an issue on devices with Avira antivirus software installed that may cause the system to become unresponsive upon restart after installing this update.	This issue has been resolved. Microsoft has removed the temporary block for all affected Windows updates. Avira has released an automatic update to address this issue. Guidance for Avira customers can be found in the Avira support article.
Certain operations, such as rename, that you perform on files or folders that are on a Cluster Shared Volume (CSV) may fail with the error, “STATUS_BAD_IMPERSONATION_LEVEL (0xC00000A5)”. This occurs when you perform the operation on a CSV owner node from a process that doesn’t have administrator privilege.	Do one of the following:

Perform the operation from a process that has administrator privilege.
Perform the operation from a node that doesn’t have CSV ownership.
Microsoft is working on a resolution and will provide an update in an upcoming release.

How to get this update

This update is now available for installation through WSUS. To get the standalone package for this update, go to the Microsoft Update Catalog website.File informationFor a list of the files that are provided in this update, download the file information for update 4493450.