July 9, 2019—KB4507452 (Monthly Rollup)

Customers who have applied KB4489887 or later Monthly Rollup Packages to Microsoft Server 2008 SP2 may notice a change to the operating system version string. The “build number” component of the version string increases by 1, and the revision number decreases by approximately 4000 numbers. To find out more about this change please refer to the following article.

**July 19, 2019 - IMPORTANT:**Beginning with the July 2019 updates, Active Directory domain controllers will intentionally block unconstrained delegation across forest, external, and quarantined trusts. Authentication requests for services that use unconstrained delegation over the listed trust types will fail when you request new tickets. Administrators should reconfigure the affected services to use resource-based constrained delegation. For more information, see KB4490425.

Improvements and fixes

This security update includes improvements and fixes that were a part of update KB4503271 (released June 20, 2019) and addresses the following issues:

• Provides protections against a variant (CVE-2019-1125) of the Spectre Variant 1 speculative execution side channel vulnerability.
• Security updates to Windows Server, Microsoft Graphics Component, Windows Shell, Windows Input and Composition, and Windows Kernel.
  For more information about the resolved security vulnerabilities, please refer to the Security Update Guide.

Known issues in this update

How to get this update