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Microsoft security advisory: Deprecation of SHA-1 hashing algorithm for Microsoft root certificate program: January 12, 2016

Summary
Microsoft has released a Microsoft security advisory about this issue for IT professionals. The security advisory contains additional security-related information. To learn more about the vulnerability, see https://technet.microsoft.com/security/advisory/3123479.
More information
Important
  • All future security and non-security updates for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 require update 2919355 to be installed. We recommend that you install update 2919355 on your Windows RT 8.1-based, Windows 8.1-based, or Windows Server 2012 R2-based computer so that you receive future updates.
  • 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.

Note For Windows RT and Windows RT 8.1, this update is available through Windows Update only.

Method 2: Microsoft Download Center

You can obtain the stand-alone update package through the Microsoft Download Center. Follow the installation instructions on the download page to install the update.

Click the download link in the following table that corresponds to the version of Windows that you are running. Determine whether your computer is running the 32-bit or 64-bit version of Windows.

More information

File hash information

Package NamePackage Hash SHA 1Package Hash SHA 2
Windows6.1-KB3123479-ia64.msu0002C5438138092A3F76E2D71C67185CC97DBB776A30A12CC7AA55CC3AE45DE7CB1F1C87580BCA9C786F36A0BE5B1367DB1B703F
Windows6.1-KB3123479-x64.msuF8D8752D60DA493C119B5B03C6B54FFC5DBFF69DE2A25310A9395104C92EB293C7031D6D4DABD2BBE0DD3820309837610C1F13C9
Windows6.1-KB3123479-x86.msu9C0C4A6279016FF83E0DADFC7976CD0C05FB97BD13438E5EC7E6865055AC4ED9CE3AC3F1E54619572C9E370BD5D7F58EAD2A9ACF
Windows8-RT-KB3123479-x64.msuC5FA41DD82269DC8A302865459C72A849801A9972269B6358D01D26B48077BEFB00C61F422F0CF8E57AD78D0E55BB097CD958083
Windows8-RT-KB3123479-x86.msu8D14C4FF52D6A6D74407FECED922A89440DF4F1BB7BA12454BC85B6D474553EB4540B5738A71376A2ECF5EC4B7E6495B242D5E5D
Windows8.1-KB3123479-x64.msu718684B947C1DADAA9FC0942196E1001AF7590DFEFE698E85967D583A403CE7526B542FBE3715B517E31D073CA849046622FC84B
Windows8.1-KB3123479-x86.msu5D63573C58F6858E08090B4C42328B2702B009A9EC93C205A37ED2758488272A255A482ABAB95677FBC132FE4FD801324B08A93D

How to obtain help and support for this security update

Help for installing updates: Support for Microsoft Update

Security solutions for IT professionals: TechNet Security Troubleshooting and Support

Help for protecting your Windows-based computer from viruses and malware: Virus Solution and Security Center

Local support according to your country: International Support
update security_patch security_update security bug flaw vulnerability malicious attacker exploit registry unauthenticated buffer overrun overflow specially-formed scope specially-crafted denial of service DoS TSE
Properties

Article ID: 3123479 - Last Review: 01/12/2016 19:39:00 - Revision: 1.1

Windows Server 2012 R2 Datacenter, Windows Server 2012 R2 Standard, Windows Server 2012 R2 Essentials, Windows Server 2012 R2 Foundation, Windows 8.1 Enterprise, Windows 8.1 Pro, Windows 8.1, Windows RT 8.1, Windows Server 2012 Datacenter, Windows Server 2012 Standard, Windows Server 2012 Essentials, Windows Server 2012 Foundation, Windows 8 Enterprise, Windows 8 Pro, Windows 8, Windows RT, Windows Server 2008 R2 Service Pack 1, Windows 7 Service Pack 1

  • kbexpertiseinter kbinfo kbsecadvisory kbsecurity kbsecvulnerability KB3123479
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