August 8, 2017—KB4034681 (Monthly Rollup)

Applies to: Windows 8.1Windows Server 2012 R2

Improvements and fixes


This security update includes improvements and fixes that were a part of update KB4025335 (released July 18, 2017) and resolves the following issues:

  • Addressed issue where a LUN connection that was received after the buffer allocation during iSCSI statistic collection overflowed the buffer and caused error 0x19. A UI issue that hides the iSCSI targets will be addressed in an upcoming release.
  • Security updates to Windows Server, Microsoft Windows Search Component, Internet Explorer, Volume Manager Driver, Common Log File System Driver, Microsoft Windows PDF Library, Microsoft JET Database Engine, Windows kernel-mode drivers, and Windows Hyper-V.

For more information about the resolved security vulnerabilities, see the Security Update Guide.

Known issues in this update


Symptom Workaround
NPS authentication may break, and wireless clients may fail to connect. On the server, set the following DWORD registry key's value to = 0: SYSTEM\CurrentControlSet\Services\RasMan\PPP\EAP\13\DisableEndEntityClientCertCheck
Japanese IME may hang in certain scenarios. Install KB2962409.

 

How to get this update


This update will be downloaded and installed automatically from Windows Update. To get the standalone package for this update, go to the Microsoft Update Catalog website.

File information

For a list of the files that are provided in this update, download the file information for update 4034681.

Prerequisites


You must have the following update installed:
2919355 Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 update: April 2014