MS16-100: Description of the security update for Secure Boot: August 9, 2016

Summary

This security update resolves a vulnerability in Microsoft Windows. The vulnerability could allow security feature bypass if an attacker installs an affected boot manager and bypasses Windows security features.

To learn more about the vulnerability, see Microsoft Security Bulletin MS16-100.

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.

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Known issues in this security update

  • When you try to install this security update, you may receive an error message that resembles the following:

    The update is not applicable to your computer


    Each Windows version requires a Servicing Stack Update (SSU). If you install updates by using Windows Update, Windows Server Update Services (WSUS), or the Microsoft Update Catalog, an SSU is automatically installed as part of the update. If you receive this error message, and if security update 3172729 is not already installed, you must install the corresponding SSU.

    OS Version

    SSU KB #

    Windows Server 2016 TP5

    3173423

    Windows Server 2012

    3173426

    Windows 10 Version 1511

    3173428

    Windows 10

    3173427

    Windows 8.1 or Windows Server 2012 R2

    3173424

  • If you are running Windows 10 Version 1607 (Anniversary Edition), the Hyper-V firmware will already have the TP5 boot manager blacklisted.

    For example, when you set up Hyper-V on a Windows 10 Version 1607-based system, if you then create a Windows Server 2016 TP5-based virtual machine (VM), the VM does not start.

    To resolve this issue, follow these steps:

    1. Open the Hyper-V Manager, right-click the VM, and then select Settings.

    2. In the navigation pane, select Security.

    3. In the details pane, select Microsoft UEFI Certificate Authority in the Template list.

    4. In the details pane, click to clear the Enable Secure Boot check box, and then click OK.

      Enable Secure Boot

    After you have installed TP5 on the VM and installed security update 3172729, re-enable secure boot. To do this, follow these steps:

    1. Open the Hyper-V Manager, right-click the VM, and then select Settings.

    2. In the navigation pane, select Security.

    3. In the details pane, click to select the Enable Secure Boot check box.

    4. In the details pane, select Microsoft Windows in the Template list, and then click OK.

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 8.1, this update is available through Windows Update only.

Method 2: Microsoft Update Catalog

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

Method 3: Microsoft Download Center

For Windows 8.1, Windows Server 2012 R2 and Windows Server 2012, 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 Microsoft Security Bulletin MS16-100 that corresponds to the version of Windows that you are running.

More Information

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

File Information

File name

SHA1 hash

SHA256 hash

Windows10.0-KB3172729-v2-x64.msu (Windows Server 2016 TP5)

19975CEF3C9B73FD9C09EB497364D9E8AF2384FE

AC7443BFD844837B3C715793B7726F12734A76F8BB2EABD9F356981639C93398

Windows10.0-KB3172729-x64.msu (Windows 10 Version 1511)

18DF742FAD6BEBC01E617C2D4F92E0D325E5138F

F5B55D436056A905E755984D457BAC67295AD3E11531A6C33F3812CFB63CE010

Windows10.0-KB3172729-x86.msu (Windows 10 Version 1511)

877795F675546BF16621464230D024863F9E512E

6FEF8B54487B61676A6825BB2E68ED865DA81C8C108ABD93991D0FCCA722297A

Windows10.0-KB3172729-x64.msu

3721C0D77731CA564387070698812DD496810BD8

A4FE15534B7DD88DF4ADC73D68943EA340AF79EE79DD57360A19FC3D1F1CBD7C

Windows10.0-KB3172729-x86.msu

2CCD3AF51D198B548C849226F66C81174303AAA3

D05A11100EC2EA00F50140E3B0BFD08B48C364E5D381F23096CE8C661652096D

Windows8-RT-KB3172729-x64.msu

69CAB4C7785B1FAA3FC450F32BED4873D53BB96F

349D5602181E776DBF7FDADBAE9543181C53690FC1D1BDD891266E3A57F246D1

Windows8.1-KB3172729-x86.msu

ACB9DD33C1657AC9189158C1176E91540BA60CA3

C7EA1C520FCCADE22FF0610DA99BFC5A5F9FF2B4F7AB861D2786AF0683436BE5

Windows8.1-KB3172729-x64.msu

E8003822A7EF4705CBB65623B72FD3CEC73FE222

D0FF89261A961F4C86D10BF5FCFAEAD9C3488DAB065C2C7338649B52A82112AB


The English (United States) version of this software update installs files that have the attributes that are listed in the following tables.

Windows Server 2016 TP5

For all supported x64-based versions

File name

File version

File size

Date

Time

Platform

Boot.stl

Not applicable

4,846

15-Jul-2016

00:54

Not applicable

Bootmgfw.efi

10.0.14368.1000

1,183,584

15-Jul-2016

00:54

Not applicable

Bootmgr.efi

10.0.14300.1050

1,164,776

15-Jul-2016

04:24

Not applicable

Bootmgfw.efi

10.0.14368.1000

1,183,584

15-Jul-2016

00:54

Not applicable

Dbupdate.bin

Not applicable

3

30-May-2016

00:49

Not applicable

Dbxupdate.bin

Not applicable

7,085

02-Jul-2016

03:09

Not applicable

Abortpxe.com

Not applicable

79

31-May-2016

04:48

Not applicable

Bootmgr.exe

10.0.14300.1050

671,720

15-Jul-2016

04:17

x86

Hdlscom1.com

Not applicable

25,662

31-May-2016

04:48

Not applicable

Hdlscom1.n12

Not applicable

25,646

31-May-2016

04:48

Not applicable

Hdlscom2.com

Not applicable

25,662

31-May-2016

04:48

Not applicable

Hdlscom2.n12

Not applicable

25,646

31-May-2016

04:48

Not applicable

Pxeboot.com

Not applicable

25,358

31-May-2016

04:48

Not applicable

Pxeboot.n12

Not applicable

25,358

31-May-2016

04:48

Not applicable

Wdsnbp.com

Not applicable

30,832

31-May-2016

04:48

Not applicable

Abortpxe.com

Not applicable

79

31-May-2016

04:48

Not applicable

Bootmgfw.efi

10.0.14368.1000

991,584

15-Jul-2016

00:58

Not applicable

Bootmgr.exe

10.0.14300.1050

671,720

15-Jul-2016

04:17

x86

Hdlscom1.com

Not applicable

25,662

31-May-2016

04:48

Not applicable

Hdlscom1.n12

Not applicable

25,646

31-May-2016

04:48

Not applicable

Hdlscom2.com

Not applicable

25,662

31-May-2016

04:48

Not applicable

Hdlscom2.n12

Not applicable

25,646

31-May-2016

04:48

Not applicable

Pxeboot.com

Not applicable

25,358

31-May-2016

04:48

Not applicable

Pxeboot.n12

Not applicable

25,358

31-May-2016

04:48

Not applicable

Wdsnbp.com

Not applicable

30,832

31-May-2016

04:48

Not applicable

Windows 10 Version 1511 file information

For all supported x64-based versions

File name

File version

File size

Date

Time

Platform

Dbupdate.bin

Not applicable

3

31-Mar-2015

01:31

Not applicable

Dbxupdate.bin

Not applicable

7,085

13-Jul-2016

01:17

Not applicable

For all supported x86-based versions

File name

File version

File size

Date

Time

Platform

Dbupdate.bin

Not applicable

3

31-Mar-2015

01:16

Not applicable

Dbxupdate.bin

Not applicable

7,085

13-Jul-2016

01:23

Not applicable

Windows 10 file information

For all supported x64-based versions

File name

File version

File size

Date

Time

Platform

Dbupdate.bin

Not applicable

3

18-Jun-2015

01:16

Not applicable

Dbxupdate.bin

Not applicable

7,085

16-Jul-2016

01:53

Not applicable

For all supported x86-based versions

File name

File version

File size

Date

Time

Platform

Dbupdate.bin

Not applicable

3

27-Mar-2015

21:47

Not applicable

Dbxupdate.bin

Not applicable

7,085

16-Jul-2016

01:50

Not applicable

Windows Server 2012 file information

Notes

  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table.

    Version

    Product

    Milestone

    Service branch

    6.2.920 0.17xxx

    Windows 8, Windows RT, or Windows Server 2012

    RTM

    GDR

    6.2.920 0.21xxx

    Windows 8, Windows RT, or Windows Server 2012

    RTM

    LDR

  • GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.

  • The MANIFEST files (.manifest) and MUM files (.mum) that are installed are not listed.

For all supported x64-based versions

File name

File version

File size

Date

Time

Platform

Dbupdate.bin

Not applicable

3

02-Jun-2012

14:53

Not applicable

Dbxupdate.bin

Not applicable

7,085

09-Jul-2016

01:13

Not applicable

Tpmtasks.dll

6.2.9200.21926

94,208

12-Jul-2016

15:57

x64

Windows 8.1 and Windows Server 2012 R2 file information

Notes

  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:

    Version

    Product

    Milestone

    Service branch

    6.3.960 0.16xxx

    Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2

    RTM

    GDR

    6.3.960 0.17xxx

    Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2

    RTM

    GDR

    6.3.960 0.18xxx

    Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2

    RTM

    GDR

  • GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.

  • The MANIFEST files (.manifest) and MUM files (.mum) that are installed are not listed.

For all supported x86-based versions

File name

File version

File size

Date

Time

Platform

Dbupdate.bin

Not applicable

3

18-Jun-2013

13:05

Not applicable

Dbxupdate.bin

Not applicable

7,085

08-Jul-2016

13:35

Not applicable

Tpmtasks.dll

6.3.9600.18408

147,456

12-Jul-2016

14:04

x86

For all supported x64-based versions

File name

File version

File size

Date

Time

Platform

Dbupdate.bin

Not applicable

3

18-Jun-2013

15:29

Not applicable

Dbxupdate.bin

Not applicable

7,085

08-Jul-2016

13:36

Not applicable

Tpmtasks.dll

6.3.9600.18408

175,616

12-Jul-2016

14:08

x64

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