What is the content of KB4499181 update?

After Microsoft launched the win10 patch KB4499181, everyone must want to know what has been updated. As far as the editor knows, the contents of this patch update mainly include: providing protection measures against a new subclass inference execution side channel vulnerability called "microarchitectural data sampling", solving the problem of preventing Microsoft Visual Studio emulator Startup issues and a series of optimization and fixes.

What has been updated with KB4499181

1. KB4499181 patch improvement patch

1. Update vulnerability protection

For 64-bit (x64) versions of Windows provide protection against a new subclass of speculative execution side-channel vulnerabilities known as Microarchitectural Data Sampling (CVE-2019-11091, CVE-2018-12126, CVE -2018-12127, CVE-2018-12130).

2. Start the registry

Use the registry settings described in the Windows client article. (Windows client operating system versions enable these registry settings by default.)

3. Transport Security

Add "gov.uk" to the HTTP Strict Transport Security top level for Internet Explorer and Microsoft Edge domain (HSTS TLD).

4. Uninstall error optimization

Solve the problem that may cause "error 1309" when installing or uninstalling certain types of .msi and .msp files on a virtual drive.

5. Optimize emulator startup

Solve the problem that prevents the Microsoft Visual Studio emulator from starting.

6. Optimize Excel cells

Resolved an issue that may cause text, layout, or cell size to become larger than expected in Microsoft Excel when using MS UI Gothic or MS PGothic fonts Narrow or wider question.

7. Update database engine

Internet Explorer, Microsoft Scripting Engine, Microsoft Edge, Windows Storage and File Systems, Microsoft Graphics Components, Windows App Platform and Frameworks, Windows Encryption, Windows Data Center Networking , Windows Server, Windows virtualization, Windows kernel, and security updates for the Microsoft JET database engine.

2. KB4499181 patch update known issues

1. Symptom description one:

On Cluster Shared Volume (CSV) Certain operations on files or folders, such as renaming, may fail with the error "STATUS_BAD_IMPERSONATION_LEVEL (0xC00000A5)".

This occurs when an operation is performed on the CSV owner node from a process that does not have administrator rights.

Workaround:

Perform one of the following actions:

Perform the action from a process with administrator privileges.

Perform operations from a node that does not own the CSV.

2. Symptom Description 2:

After installing the May 14, 2019 update, some govs that do not support HTTP Strict Transport Security (HSTS). The UK website may not be accessible through Internet Explorer 11 or Microsoft Edge.

Workaround:

This issue is resolved in KB4505055.

3. Symptom description three:

After installing this update and restarting, some devices with Hyper-V enabled may enter BitLocker recovery mode , and received error "0xC0210000".

Workaround:

This issue is resolved in KB4507450.

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