Summary
This security update resolves a denial of service vulnerability in Microsoft Windows. An attacker who successfully exploited the vulnerability could cause the system to become unresponsive. To exploit the vulnerability, an attacker must have valid credentials.
To learn more about the vulnerability, see Microsoft Security Bulletin MS15-120.
More Information
Important
- If you manually install this security update, we recommend that you install the update on your server-based systems first and then install the update on the client-based systems. Or, install the update on the server-based and client-based systems at the same time.
Depending on your IPsec implementation, deploying this update to client systems only may result in a loss of network connectivity. - All future security and nonsecurity 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 Microsoft Security Bulletin MS15-120 that corresponds to the version of Windows that you are running.
More Information
Security update deployment information
To Windows 8 and Windows 8.1 (all editions) Reference Table
The following table contains the security update information for this software.
| Security update file name | For all supported 32-bit editions of Windows 8: Windows8-RT-KB3102939-x86.msu |
|---|---|
| For all supported x64-based editions of Windows 8: Windows8-RT-KB3102939-x64.msu |
|
| For all supported 32-bit editions of Windows 8.1: Windows8.1-KB3102939-x86.msu |
|
| For all supported x64-based editions of Windows 8.1: Windows8.1-KB3102939-x64.msu |
|
| Installation switches | See Microsoft Knowledge Base Article 934307 |
| Restart requirement | In some cases, this update does not require a system restart. If the required files are being used, this update will require a system restart. If this behavior occurs, you receive a message that advises you to restart your system. |
| Removal information | To uninstall an update that is installed by WUSA, use the /Uninstall setup switch. Or, click Control Panel, click System and Security, and then click Windows Update. Under See also, click Installed updates, and then select from the list of updates. |
| File information | See the file information section. |
| Registry key verification | Note A registry key does not exist to validate the presence of this update. |
Windows Server 2012 and Windows Server 2012 R2 (all editions)Reference Table
The following table contains the security update information for this software.
| Security update file name | For all supported editions of Windows Server 2012: Windows8-RT-KB3102939-x64.msu |
|---|---|
| For all supported editions of Windows Server 2012 R2: Windows8.1-KB3102939-x64.msu |
|
| Installation switches | See Microsoft Knowledge Base Article 934307 |
| Restart requirement | In some cases, this update does not require a system restart. If the required files are being used, this update will require a system restart. If this behavior occurs, you receive a message that advises you to restart your system. |
| Removal information | To uninstall an update that is installed by WUSA, use the /Uninstall setup switch. Or, click Control Panel, click System and Security, and then click Windows Update. Under See also, click Installed updates, and then select from the list of updates. |
| File information | See the file information section. |
| Registry key verification | Note A registry key does not exist to validate the presence of this update. |
Windows RT and Windows RT 8.1 (all editions)Reference Table
The following table contains the security update information for this software.
| Deployment | These updates are available through Windows Update only. |
|---|---|
| Restart requirement | Yes, you must restart your system after you apply this security update. |
| Removal information | Click Control Panel, click System and Security, and then click Windows Update. Under See also, click Installed updates, and then select from the list of updates. |
| File information | See the file information section. |
File hash information
| Package Name | Package Hash SHA 1 | Package Hash SHA 2 |
|---|---|---|
| Windows8-RT-KB3102939-x86.msu | E3BA8513D11160B99DE7874DC82CC87E10D285AB | E6CEE790FB5410D382B9A7987532EDD8F90761EA7D753CF4FE5A9DC623C53488 |
| Windows8-RT-KB3102939-x64.msu | F56D7AD3E6F87F9B0DC35BC5723E42438E3BA187 | CF0F22768B869A74A781A0FDA075D1E140ADC1196F22B9BAB878153B01B2F297 |
| Windows8.1-KB3102939-x86.msu | 30C8E0BF6CD91A669C9BAA7334D490027F00AA95 | 6366AA9E2C58A366D1D5D42BA86175C9C22B15D60CD42EFE35D9FEAF1280EB73 |
| Windows8.1-KB3102939-x64.msu | 194894AEA47349E55B195ACEF50B56930D4540B2 | F2EAB3C1FF3444E6AA961D391E1D0F64075DFE5D46C4ECF484A641D9B3AB2E84 |
| Windows8-RT-KB3102939-arm.msu | B90A261CE4CFA8277F6F77D8065AD68AE4D17F19 | 184FC80EE6C844E95D3CD9A7A052A0EC805289AF9EC05AACC0116566FE008A6A |
| Windows8.1-KB3102939-arm.msu | 7CA826FACB7440A1B487EAC3EEA7319BDC5D7E52 | 5865F199E61AFE730902164AF520321CE03707A3F755831783BCE704A88CB4AA |
| Windows8-RT-KB3102939-x64.msu | F56D7AD3E6F87F9B0DC35BC5723E42438E3BA187 | CF0F22768B869A74A781A0FDA075D1E140ADC1196F22B9BAB878153B01B2F297 |
| Windows8-RT-KB3102939-x64.msu | F56D7AD3E6F87F9B0DC35BC5723E42438E3BA187 | CF0F22768B869A74A781A0FDA075D1E140ADC1196F22B9BAB878153B01B2F297 |
| Windows8.1-KB3102939-x64.msu | 194894AEA47349E55B195ACEF50B56930D4540B2 | F2EAB3C1FF3444E6AA961D391E1D0F64075DFE5D46C4ECF484A641D9B3AB2E84 |
| Windows8.1-KB3102939-x64.msu | 194894AEA47349E55B195ACEF50B56930D4540B2 | F2EAB3C1FF3444E6AA961D391E1D0F64075DFE5D46C4ECF484A641D9B3AB2E84 |
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.
Windows 8 and Windows Server 2012 file information
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 0.17 xxx Windows 8, Windows RT, or Windows Server 2012 RTM GDR 6.2.920 0.21 xxx 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.
Note The MANIFEST files (.manifest) and MUM files (.mum) that are installed are not listed.
For all supported x86-based versions of Windows 8
| File name | File version | File size | Date | Time | Platform |
|---|---|---|---|---|---|
| Bfe.dll | 6.2.9200.17539 | 473,600 | 11-Oct-2015 | 06:52 | x86 |
| Fwpuclnt.dll | 6.2.9200.16634 | 245,248 | 10-Jun-2013 | 19:10 | x86 |
| Ikeext.dll | 6.2.9200.17539 | 684,032 | 11-Oct-2015 | 06:52 | x86 |
| Nshwfp.dll | 6.2.9200.17218 | 702,464 | 18-Dec-2014 | 06:20 | x86 |
| Bfe.dll | 6.2.9200.21656 | 473,600 | 12-Oct-2015 | 15:00 | x86 |
| Fwpuclnt.dll | 6.2.9200.21656 | 245,248 | 12-Oct-2015 | 15:00 | x86 |
| Ikeext.dll | 6.2.9200.21656 | 684,032 | 12-Oct-2015 | 15:00 | x86 |
| Nshwfp.dll | 6.2.9200.21317 | 702,464 | 18-Dec-2014 | 00:38 | x86 |
| Bfe.dll | 6.2.9200.17539 | 473,600 | 11-Oct-2015 | 06:52 | x86 |
| Fwpuclnt.dll | 6.2.9200.16634 | 245,248 | 10-Jun-2013 | 19:10 | x86 |
| Ikeext.dll | 6.2.9200.17539 | 684,032 | 11-Oct-2015 | 06:52 | x86 |
| Networksecurity-ppdlic.xrm-ms | Not Applicable | 2,920 | 11-Oct-2015 | 07:24 | Not Applicable |
| Nshwfp.dll | 6.2.9200.17218 | 702,464 | 18-Dec-2014 | 06:20 | x86 |
| Wfplwfs.sys | 6.2.9200.17218 | 38,720 | 18-Dec-2014 | 07:02 | x86 |
| Bfe.dll | 6.2.9200.21656 | 473,600 | 12-Oct-2015 | 15:00 | x86 |
| Fwpuclnt.dll | 6.2.9200.21656 | 245,248 | 12-Oct-2015 | 15:00 | x86 |
| Ikeext.dll | 6.2.9200.21656 | 684,032 | 12-Oct-2015 | 15:00 | x86 |
| Networksecurity-ppdlic.xrm-ms | Not Applicable | 2,920 | 12-Oct-2015 | 15:21 | Not Applicable |
| Nshwfp.dll | 6.2.9200.21317 | 702,464 | 18-Dec-2014 | 00:38 | x86 |
| Wfplwfs.sys | 6.2.9200.21317 | 38,720 | 18-Dec-2014 | 01:29 | x86 |
For all supported x64-based versions of Windows 8 and Windows Server 2012
| File name | File version | File size | Date | Time | Platform |
|---|---|---|---|---|---|
| Bfe.dll | 6.2.9200.17539 | 723,968 | 11-Oct-2015 | 06:45 | x64 |
| Fwpuclnt.dll | 6.2.9200.16634 | 381,952 | 10-Jun-2013 | 19:15 | x64 |
| Ikeext.dll | 6.2.9200.17539 | 1,160,192 | 11-Oct-2015 | 06:45 | x64 |
| Nshwfp.dll | 6.2.9200.17218 | 889,344 | 18-Dec-2014 | 06:52 | x64 |
| Bfe.dll | 6.2.9200.21656 | 718,848 | 12-Oct-2015 | 14:33 | x64 |
| Fwpuclnt.dll | 6.2.9200.21656 | 378,880 | 12-Oct-2015 | 14:33 | x64 |
| Ikeext.dll | 6.2.9200.21656 | 1,074,688 | 12-Oct-2015 | 14:33 | x64 |
| Nshwfp.dll | 6.2.9200.21317 | 889,344 | 18-Dec-2014 | 00:46 | x64 |
| Bfe.dll | 6.2.9200.17539 | 723,968 | 11-Oct-2015 | 06:45 | x64 |
| Fwpuclnt.dll | 6.2.9200.16634 | 381,952 | 10-Jun-2013 | 19:15 | x64 |
| Ikeext.dll | 6.2.9200.17539 | 1,160,192 | 11-Oct-2015 | 06:45 | x64 |
| Networksecurity-ppdlic.xrm-ms | Not Applicable | 2,920 | 11-Oct-2015 | 08:33 | Not Applicable |
| Nshwfp.dll | 6.2.9200.17218 | 889,344 | 18-Dec-2014 | 06:52 | x64 |
| Wfplwfs.sys | 6.2.9200.17218 | 96,576 | 18-Dec-2014 | 08:51 | x64 |
| Bfe.dll | 6.2.9200.21656 | 718,848 | 12-Oct-2015 | 14:33 | x64 |
| Fwpuclnt.dll | 6.2.9200.21656 | 378,880 | 12-Oct-2015 | 14:33 | x64 |
| Ikeext.dll | 6.2.9200.21656 | 1,074,688 | 12-Oct-2015 | 14:33 | x64 |
| Networksecurity-ppdlic.xrm-ms | Not Applicable | 2,920 | 12-Oct-2015 | 14:44 | Not Applicable |
| Nshwfp.dll | 6.2.9200.21317 | 889,344 | 18-Dec-2014 | 00:46 | x64 |
| Wfplwfs.sys | 6.2.9200.21317 | 96,576 | 18-Dec-2014 | 02:58 | x64 |
| Fwpuclnt.dll | 6.2.9200.16634 | 245,248 | 10-Jun-2013 | 19:10 | x86 |
| Nshwfp.dll | 6.2.9200.17218 | 702,464 | 18-Dec-2014 | 06:20 | x86 |
| Fwpuclnt.dll | 6.2.9200.21656 | 245,248 | 12-Oct-2015 | 15:00 | x86 |
| Nshwfp.dll | 6.2.9200.21317 | 702,464 | 18-Dec-2014 | 00:38 | x86 |
Windows 8.1 and Windows Server 2012 R2 file information
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 6.3.920 0.17 xxx 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.
Note The MANIFEST files (.manifest) and MUM files (.mum) that are installed are not listed.
For all supported x86-based versions of Windows 8.1
| File name | File version | File size | Date | Time | Platform |
|---|---|---|---|---|---|
| Bfe.dll | 6.3.9600.18009 | 570,368 | 10-Aug-2015 | 17:01 | x86 |
| Fwpuclnt.dll | 6.3.9600.18009 | 272,384 | 10-Aug-2015 | 16:56 | x86 |
| Ikeext.dll | 6.3.9600.18086 | 734,208 | 08-Oct-2015 | 15:45 | x86 |
| Nshwfp.dll | 6.3.9600.18009 | 561,664 | 10-Aug-2015 | 16:46 | x86 |
| Bfe.dll | 6.3.9600.18009 | 570,368 | 10-Aug-2015 | 17:01 | x86 |
| Fwpuclnt.dll | 6.3.9600.18009 | 272,384 | 10-Aug-2015 | 16:56 | x86 |
| Ikeext.dll | 6.3.9600.18086 | 734,208 | 08-Oct-2015 | 15:45 | x86 |
| Networksecurity-ppdlic.xrm-ms | Not Applicable | 3,059 | 08-Oct-2015 | 17:55 | Not Applicable |
| Nshwfp.dll | 6.3.9600.18009 | 561,664 | 10-Aug-2015 | 16:46 | x86 |
| Wfplwfs.sys | 6.3.9600.17485 | 69,440 | 10-Nov-2014 | 17:47 | 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 |
|---|---|---|---|---|---|
| Bfe.dll | 6.3.9600.18009 | 845,312 | 10-Aug-2015 | 18:15 | x64 |
| Fwpuclnt.dll | 6.3.9600.18009 | 422,400 | 10-Aug-2015 | 18:06 | x64 |
| Ikeext.dll | 6.3.9600.18086 | 1,083,904 | 08-Oct-2015 | 16:08 | x64 |
| Nshwfp.dll | 6.3.9600.18009 | 713,216 | 10-Aug-2015 | 17:49 | x64 |
| Bfe.dll | 6.3.9600.18009 | 845,312 | 10-Aug-2015 | 18:15 | x64 |
| Fwpuclnt.dll | 6.3.9600.18009 | 422,400 | 10-Aug-2015 | 18:06 | x64 |
| Ikeext.dll | 6.3.9600.18086 | 1,083,904 | 08-Oct-2015 | 16:08 | x64 |
| Networksecurity-ppdlic.xrm-ms | Not Applicable | 3,059 | 08-Oct-2015 | 18:46 | Not Applicable |
| Nshwfp.dll | 6.3.9600.18009 | 713,216 | 10-Aug-2015 | 17:49 | x64 |
| Wfplwfs.sys | 6.3.9600.17485 | 136,512 | 10-Nov-2014 | 18:06 | x64 |
| Fwpuclnt.dll | 6.3.9600.18009 | 272,384 | 10-Aug-2015 | 16:56 | x86 |
| Nshwfp.dll | 6.3.9600.18009 | 561,664 | 10-Aug-2015 | 16:46 | x86 |
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