Description of the security update for the SMB Server elevation of privilege vulnerability in Windows Server 2008: January 3, 2018

Applies to: Windows Server 2008 Service Pack 2Windows Server 2008 FoundationWindows Server 2008 Standard


An elevation of privilege vulnerability exists in the Microsoft Server Message Block (SMB) server when an attacker who has valid credentials attempts to open a specially crafted file over the SMB protocol on the same machine. An attacker who successfully exploits this vulnerability could bypass certain security checks in the operating system

The update addresses the vulnerability by correcting how Windows SMB Server handles such specially crafted files.

To learn more about the vulnerability, go to CVE-2018-0749.

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 Windows Update: FAQ.

Method 2: Microsoft Update Catalog

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

File Information

File information

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables. The dates and times for these files are listed in Coordinated Universal Time (UTC). The dates and times for these files on your local computer are displayed in your local time together with your current daylight-saving time (DST) bias. Additionally, the dates and times may change when you perform certain operations on the files.

Windows Server 2008 file information