Summary

An information disclosure vulnerability exists in Windows when the Windows bowser.sys kernel-mode driver does not correctly handle objects in memory. An attacker who successfully exploits the vulnerability could potentially expose the contents of system memory.

To learn more about the vulnerability, go to CVE-2018-8271.

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.
Important

  • 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.

More 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 the times for these files are listed in Coordinated Universal Time (UTC). The dates and the 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 the times may change when you perform certain operations on the files.

 

How to obtain help and support for this security update

Help for installing updates: Windows Update: FAQ

Help for protecting your Windows-based computer from viruses and malware: Microsoft Secure

Local support according to your country: International Support

File Information

File hash information

File name

SHA1 hash

SHA256 hash

WindowsXP-KB4338381-x86-Embedded-ENU.exe

5E6168475C2FB6F8D78D9B639E6D9802F4B90917

C33C07FDC50A5EA654FC7181457EF5CF22DB6BA86D2931A9A029F815EB32FA90

For all supported x86-based versions

File name

File version

File size

Date

Time

Platform

Mrxsmb.sys

5.1.2600.7547

456,960

18-Jul-2018

23:57

x86

Updspapi.dll

6.3.13.0

382,840

31-Jan-2018

18:26

x86

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