MS17-004: Description of the security update for Local Security Authority Subsystem Service: January 10, 2017

Attiecas uz: Windows Server 2008 Service Pack 2Windows Server 2008 DatacenterWindows Server 2008 Enterprise


A denial of service vulnerability exists in the way that the Local Security Authority Subsystem Service (LSASS) handles authentication requests. An attacker who successfully exploited the vulnerability could cause denial of service on the target system's LSASS service, which triggers an automatic reboot of the system. This security update addresses the vulnerability by changing the way that LSASS handles specially crafted authentication requests. 

To learn more about the vulnerability, see Microsoft Security Bulletin MS17-004.

More Information

  • If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.

How to obtain and install the update

Method 1: Windows Update

This update is available through Windows Update. When you turn on automatic updating, this update will be downloaded and installed automatically. For more information about how to turn on automatic updating, see
Get security updates automatically.

Method 2: Microsoft Update Catalog

To get the stand-alone package for this update, go to the Microsoft Update Catalog website.