Microsoft Security Advisory 3045755: Update to improve PKU2U authentication

Summary

Microsoft is announcing the availability of a defense-in-depth update that improves the authentication that is used by the Public Key Cryptography User-to-User (PKU2U) security support provider (SSP) in Windows 8.1, Windows Server 2012 R2, and Windows RT 8.1. The improvement is part of ongoing efforts to strengthen the effectiveness of security controls in Windows.

Introduction

Microsoft has released a Microsoft security advisory about this issue for IT professionals. The security advisory contains additional security-related information. To view the security advisory, visit the following Microsoft website:

https://technet.microsoft.com/security/advisory/3045755The following files are available for download from the Microsoft Download Center:


For all supported x86-based versions of Windows 8.1

Download Download the package now.

For all supported x64-based versions of Windows 8.1

Download Download the package now.

For all supported x64-based versions of Windows Server 2012 R2

Download Download the package now.







Release Date: April 14, 2015

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591 How to obtain Microsoft support files from online servicesMicrosoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

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 and with your current daylight saving time (DST) bias. Additionally, the dates and times may change when you perform certain operations on the files.

For all supported x86-based versions of Windows 8.1

File name

File version

File size

Date

Time

Platform

Pku2u.dll

6.3.9600.17728

208,896

13-Mar-2015

02:37

x86

For all supported x64-based versions of Windows 8.1 and Windows Server 2012 R2

File name

File version

File size

Date

Time

Platform

Pku2u.dll

6.3.9600.17728

259,072

13-Mar-2015

02:58

x64

Pku2u.dll

6.3.9600.17728

208,896

13-Mar-2015

02:37

x86


Package Name

Package Hash SHA1

Package Hash SHA2

Windows8.1-KB3045755-x64.msu

8F5C3FDA0D47B8217751EA17761A5C0BE847841E

B5D1182EF3DA6A155B236E0E232527C1E82AC4A47F1DE5E7E443425E8D7E7038

Windows8.1-KB3045755-x86.msu

3F5645149551064ECFD3A2F86FCFEFF9FF33C55F

619F343215B24E43FBCE9EBC4C6024C623B5D21E1C192EFB1F0E0E895AF090F2


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