Description of the security update for the Windows Wireless WPA pairwise encryption key reinstallation vulnerability in WES09 and POSReady 2009: March 13, 2018

Summary

An information disclosure vulnerability exists in the Windows implementation of wireless networking. An attacker who successfully exploits this vulnerability could potentially decrypt wireless traffic of hosts on a WPA or WPA 2-protected wireless network.

To learn more about the vulnerability, see CVE-2017-13077.

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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.

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.

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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.

 

How to obtain help and support for this security update

Help for installing updates: Windows Update: FAQ

Security solutions for IT professionals: TechNet Security Support and Troubleshooting

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

Local support according to your country: International Support

WES09 and POSReady 2009 file information

File hash information

File name

SHA1 hash

SHA256 hash

WindowsXP-KB4089694-x86-Embedded-ENU.exe

F0698BDBB2C0DBAF56D7C4071061046865EC3526

794C9E9B730527566004698179C27E14B182082A90F8BF3DBC4DD0CEDC08E305

For all supported x86-based versions

File name

File version

File size

Date

Time

Platform

Wzcsvc.dll

5.1.2600.7432

484,352

15-Feb-2018

00:16

x86

Updspapi.dll

6.3.13.0

382,840

16-May-2014

03:08

x86

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