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HistoryApr 12, 2016 - 7:00 a.m.

MS16-048: Description of the security update for CSRSS: April 12, 2016

2016-04-1207:00:00
Microsoft
support.microsoft.com
77

7.6 High

AI Score

Confidence

High

0.956 High

EPSS

Percentile

99.4%

MS16-048: Description of the security update for CSRSS: April 12, 2016

Summary

This security update resolves a vulnerability in Microsoft Windows. The vulnerability could allow security feature bypass if an attacker logs on to a target system and runs a specially crafted application.

To learn more about the vulnerability, see Microsoft Security Bulletin MS16-048.

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.

Known issues in this security update

  • After installing this security update, some systems that are running third party software may display a 0x00000100 Stop error message after the computer is restarted.

This problem may occur if the third party software has replaced the winload.exe file. Software that is known to do this includes imaging software from StorageCraft.

Contact the manufacturer of you software for more information about how to resolve this problem.

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

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 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 MS16-048 that corresponds to the version of Windows that you are running.

__

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 hash information

File name SHA1 hash SHA256 hash
Windows8.1-KB3146723-x64.msu 5AAE2A7642E87B2881D7337EF736EAEE679F907A 7419BA7ECB7BCD962ECE7AEF269BEE633F6CBC4F4778D5F23CD3C7F7E8FC270F
Windows8.1-KB3146723-x86.msu 5F3689532BF8969D68F21B7B3F82B111F8232F43 4FD9572130014B0AE6A075AC0DB772CEB350EBD385C867E4AB71642F39EC29EE
Windows8-RT-KB3146723-x64.msu 682AE0931C3FA2AFA4E988B8FD08249F15E1D977 06D3E3F90C3863E7A970757446DD87CC47C5EF7F08F406F9B49FF5C988158D86
Windows8-RT-KB3146723-x64_New58.msu B629DB9F3EBB85B40A61A1CC5DEA13C11A124B6C DB652213B70BA0D0CC19ADD967BA933465FE76FD0C74D785458CB8172461B6E0

__

File information

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables.Windows 8.1 and Windows Server 2012 R2 file informationNotes

* 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 0.17 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. 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 versionsFile name| File version| File size| Date| Time| Platform| Service branch
    —|—|—|—|—|—|—
    Chs_boot.ttf| Not applicable| 3,695,655| 03-Mar-2016| 19:28| Not applicable| Not applicable
    Msyhn_boot.ttf| Not applicable| 150,727| 03-Mar-2016| 19:28| Not applicable| Not applicable
    Msyh_boot.ttf| Not applicable| 154,833| 03-Mar-2016| 19:28| Not applicable| Not applicable
    Cht_boot.ttf| Not applicable| 3,878,347| 03-Mar-2016| 19:28| Not applicable| Not applicable
    Msjhn_boot.ttf| Not applicable| 161,491| 03-Mar-2016| 19:28| Not applicable| Not applicable
    Msjh_boot.ttf| Not applicable| 163,498| 03-Mar-2016| 19:28| Not applicable| Not applicable
    Segmono_boot.ttf| Not applicable| 44,623| 03-Mar-2016| 19:28| Not applicable| Not applicable
    Segoen_slboot.ttf| Not applicable| 85,691| 03-Mar-2016| 19:28| Not applicable| Not applicable
    Segoe_slboot.ttf| Not applicable| 86,007| 03-Mar-2016| 19:28| Not applicable| Not applicable
    Wgl4_boot.ttf| Not applicable| 49,027| 03-Mar-2016| 19:28| Not applicable| Not applicable
    Jpn_boot.ttf| Not applicable| 1,985,803| 03-Mar-2016| 19:28| Not applicable| Not applicable
    Meiryon_boot.ttf| Not applicable| 141,491| 03-Mar-2016| 19:28| Not applicable| Not applicable
    Meiryo_boot.ttf| Not applicable| 143,108| 03-Mar-2016| 19:28| Not applicable| Not applicable
    Kor_boot.ttf| Not applicable| 2,372,935| 03-Mar-2016| 19:28| Not applicable| Not applicable
    Malgunn_boot.ttf| Not applicable| 174,367| 03-Mar-2016| 19:28| Not applicable| Not applicable
    Malgun_boot.ttf| Not applicable| 176,812| 03-Mar-2016| 19:28| Not applicable| Not applicable
    Winload.efi| 6.3.9600.18258| 1,663,192| 03-Mar-2016| 19:27| Not applicable| Not applicable
    Winload.exe| 6.3.9600.18258| 1,523,216| 03-Mar-2016| 19:27| x64| Not applicable
    Winresume.efi| 6.3.9600.18258| 1,490,128| 03-Mar-2016| 19:27| Not applicable| Not applicable
    Winresume.exe| 6.3.9600.18258| 1,358,960| 03-Mar-2016| 19:27| x64| Not applicable
    Basesrv.dll| 6.3.9600.18258| 59,392| 03-Mar-2016| 16:13| x64| Not applicable
    Csrsrv.dll| 6.3.9600.17933| 59,392| 13-Jul-2015| 19:46| x64| Not applicable
    Ntdll.dll| 6.3.9600.18258| 1,737,088| 03-Mar-2016| 19:27| x64| Not applicable
    Ntoskrnl.exe| 6.3.9600.18258| 7,452,512| 03-Mar-2016| 19:28| x64| Not applicable
    Microsoft-windows-system-events.dll| 6.3.9600.18258| 246,784| 03-Mar-2016| 18:29| x64| Not applicable
    Krnlprov.dll| 6.3.9600.18258| 46,592| 03-Mar-2016| 18:06| x64| Not applicable
    Krnlprov.mof| Not applicable| 14,840| 22-Aug-2013| 06:51| Not applicable| Not applicable
    Ntvdm64.dll| 6.3.9600.18146| 16,896| 21-Nov-2015| 18:32| x64| AMD64_MICROSOFT-WINDOWS-WOW
    Wow64.dll| 6.3.9600.17734| 285,184| 20-Mar-2015| 04:10| x64| AMD64_MICROSOFT-WINDOWS-WOW
    Wow64cpu.dll| 6.3.9600.17734| 13,312| 20-Mar-2015| 04:10| x64| AMD64_MICROSOFT-WINDOWS-WOW
    Ntdll.dll| 6.3.9600.18258| 1,501,496| 03-Mar-2016| 18:38| x86| Not applicable
    Acwow64.dll| 6.3.9600.17734| 37,376| 20-Mar-2015| 03:06| x86| WOW64_MICROSOFT-WINDOWS-WOW
    Instnm.exe| 6.3.9600.17475| 8,704| 29-Oct-2014| 01:13| x86| WOW64_MICROSOFT-WINDOWS-WOW
    Ntvdm64.dll| 6.3.9600.18146| 14,336| 21-Nov-2015| 17:50| x86| WOW64_MICROSOFT-WINDOWS-WOW
    Setup16.exe| 3.1.0.1918| 25,600| 29-Oct-2014| 01:13| x86| WOW64_MICROSOFT-WINDOWS-WOW
    User.exe| 6.3.9600.17475| 4,096| 29-Oct-2014| 01:14| x86| WOW64_MICROSOFT-WINDOWS-WOW
    Wow32.dll| 6.3.9600.17475| 5,632| 29-Oct-2014| 01:15| x86| WOW64_MICROSOFT-WINDOWS-WOW
    For all supported x86-based versionsFile name| File version| File size| Date| Time| Platform
    —|—|—|—|—|—
    Chs_boot.ttf| Not applicable| 3,695,658| 03-Mar-2016| 18:43| Not applicable
    Msyhn_boot.ttf| Not applicable| 150,730| 03-Mar-2016| 18:43| Not applicable
    Msyh_boot.ttf| Not applicable| 154,831| 03-Mar-2016| 18:43| Not applicable
    Cht_boot.ttf| Not applicable| 3,878,350| 03-Mar-2016| 18:43| Not applicable
    Msjhn_boot.ttf| Not applicable| 161,495| 03-Mar-2016| 18:43| Not applicable
    Msjh_boot.ttf| Not applicable| 163,499| 03-Mar-2016| 18:43| Not applicable
    Segmono_boot.ttf| Not applicable| 44,623| 03-Mar-2016| 18:43| Not applicable
    Segoen_slboot.ttf| Not applicable| 85,688| 03-Mar-2016| 18:43| Not applicable
    Segoe_slboot.ttf| Not applicable| 86,007| 03-Mar-2016| 18:43| Not applicable
    Wgl4_boot.ttf| Not applicable| 49,024| 03-Mar-2016| 18:39| Not applicable
    Jpn_boot.ttf| Not applicable| 1,985,803| 03-Mar-2016| 18:43| Not applicable
    Meiryon_boot.ttf| Not applicable| 141,491| 03-Mar-2016| 18:43| Not applicable
    Meiryo_boot.ttf| Not applicable| 143,111| 03-Mar-2016| 18:43| Not applicable
    Kor_boot.ttf| Not applicable| 2,372,935| 03-Mar-2016| 18:43| Not applicable
    Malgunn_boot.ttf| Not applicable| 174,367| 03-Mar-2016| 18:43| Not applicable
    Malgun_boot.ttf| Not applicable| 176,815| 03-Mar-2016| 18:43| Not applicable
    Winload.efi| 6.3.9600.18258| 1,396,696| 03-Mar-2016| 18:38| Not applicable
    Winload.exe| 6.3.9600.18258| 1,285,608| 03-Mar-2016| 18:38| x86
    Winresume.efi| 6.3.9600.18258| 1,272,192| 03-Mar-2016| 18:38| Not applicable
    Winresume.exe| 6.3.9600.18258| 1,172,000| 03-Mar-2016| 18:38| x86
    Basesrv.dll| 6.3.9600.18258| 50,688| 03-Mar-2016| 16:11| x86
    Csrsrv.dll| 6.3.9600.17933| 48,640| 13-Jul-2015| 19:27| x86
    Ntdll.dll| 6.3.9600.18258| 1,471,552| 03-Mar-2016| 18:38| x86
    Ntoskrnl.exe| 6.3.9600.18258| 5,764,448| 03-Mar-2016| 18:43| Not applicable
    Microsoft-windows-system-events.dll| 6.3.9600.18258| 246,784| 03-Mar-2016| 17:49| x86
    Krnlprov.dll| 6.3.9600.18258| 38,912| 03-Mar-2016| 17:30| x86
    Krnlprov.mof| Not applicable| 14,840| 21-Aug-2013| 23:46| Not applicable
    Windows Server 2012 file informationNotes

  • 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 versionsFile name| File version| File size| Date| Time| Platform
    —|—|—|—|—|—
    Basesrv.dll| 6.2.9200.21793| 54,272| 03-Mar-2016| 21:48| x64
    For all supported x64-based versionsFile name| File version| File size| Date| Time| Platform| SP requirement| Service branch
    —|—|—|—|—|—|—|—
    Advapi32.dll| 6.2.9200.21820| 895,488| 29-Mar-2016| 21:47| x64| None| Not applicable
    Winload.efi| 6.2.9200.21638| 1,405,408| 22-Sep-2015| 21:46| Not applicable| None| Not applicable
    Winload.exe| 6.2.9200.21638| 1,273,184| 22-Sep-2015| 21:46| x64| None| Not applicable
    Winresume.efi| 6.2.9200.20726| 1,217,352| 25-May-2013| 00:17| Not applicable| None| Not applicable
    Winresume.exe| 6.2.9200.20726| 1,093,904| 25-May-2013| 00:17| x64| None| Not applicable
    Basesrv.dll| 6.2.9200.21820| 54,272| 29-Mar-2016| 21:47| x64| None| Not applicable
    Csrsrv.dll| 6.2.9200.21548| 48,128| 11-Jul-2015| 18:07| x64| None| Not applicable
    Ksecdd.sys| 6.2.9200.21473| 100,184| 02-May-2015| 06:23| x64| None| Not applicable
    Lsass.exe| 6.2.9200.20521| 35,840| 20-Sep-2012| 06:33| x64| None| Not applicable
    Sspicli.dll| 6.2.9200.21703| 164,352| 17-Nov-2015| 08:00| x64| None| Not applicable
    Sspisrv.dll| 6.2.9200.20521| 27,648| 20-Sep-2012| 06:32| x64| None| Not applicable
    Cng.sys| 6.2.9200.21637| 566,072| 22-Sep-2015| 13:43| x64| None| Not applicable
    Ksecpkg.sys| 6.2.9200.21703| 171,352| 17-Nov-2015| 09:52| x64| None| Not applicable
    Lsasrv.dll| 6.2.9200.21820| 1,280,000| 29-Mar-2016| 21:48| x64| None| Not applicable
    Adtschema.dll| 6.2.9200.21289| 719,360| 10-Nov-2014| 04:43| x64| None| Not applicable
    Msaudite.dll| 6.2.9200.21269| 146,944| 11-Oct-2014| 05:38| x64| None| Not applicable
    Msobjs.dll| 6.2.9200.16384| 61,952| 26-Jul-2012| 02:36| x64| None| Not applicable
    Ntdll.dll| 6.2.9200.21820| 1,821,704| 30-Mar-2016| 01:32| x64| None| Not applicable
    Ocspsvcctrs.ini| Not applicable| 2,960| 26-Jul-2012| 05:07| Not applicable| SPS| AMD64_MICROSOFT-WINDOWS-OCSP
    Ocspsvcctrs.ini| Not applicable| 3,134| 26-Jul-2012| 08:00| Not applicable| SPS| AMD64_MICROSOFT-WINDOWS-OCSP
    Ocspsvcctrs.ini| Not applicable| 2,918| 26-Jul-2012| 04:43| Not applicable| SPS| AMD64_MICROSOFT-WINDOWS-OCSP
    Ocspsvcctrs.ini| Not applicable| 3,210| 26-Jul-2012| 07:59| Not applicable| SPS| AMD64_MICROSOFT-WINDOWS-OCSP
    Ocspsvcctrs.ini| Not applicable| 3,098| 26-Jul-2012| 08:00| Not applicable| SPS| AMD64_MICROSOFT-WINDOWS-OCSP
    Ocspsvcctrs.ini| Not applicable| 3,028| 26-Jul-2012| 07:59| Not applicable| SPS| AMD64_MICROSOFT-WINDOWS-OCSP
    Ocspsvcctrs.ini| Not applicable| 3,140| 26-Jul-2012| 05:21| Not applicable| SPS| AMD64_MICROSOFT-WINDOWS-OCSP
    Ocspsvcctrs.ini| Not applicable| 2,642| 26-Jul-2012| 08:11| Not applicable| SPS| AMD64_MICROSOFT-WINDOWS-OCSP
    Ocspsvcctrs.ini| Not applicable| 2,576| 26-Jul-2012| 05:20| Not applicable| SPS| AMD64_MICROSOFT-WINDOWS-OCSP
    Ocspsvcctrs.ini| Not applicable| 3,026| 26-Jul-2012| 07:36| Not applicable| SPS| AMD64_MICROSOFT-WINDOWS-OCSP
    Ocspsvcctrs.ini| Not applicable| 3,028| 26-Jul-2012| 07:48| Not applicable| SPS| AMD64_MICROSOFT-WINDOWS-OCSP
    Ocspsvcctrs.ini| Not applicable| 3,188| 26-Jul-2012| 05:30| Not applicable| SPS| AMD64_MICROSOFT-WINDOWS-OCSP
    Ocspsvcctrs.ini| Not applicable| 3,126| 26-Jul-2012| 05:08| Not applicable| SPS| AMD64_MICROSOFT-WINDOWS-OCSP
    Ocspsvcctrs.ini| Not applicable| 3,064| 26-Jul-2012| 07:49| Not applicable| SPS| AMD64_MICROSOFT-WINDOWS-OCSP
    Ocspsvcctrs.ini| Not applicable| 3,092| 26-Jul-2012| 07:52| Not applicable| SPS| AMD64_MICROSOFT-WINDOWS-OCSP
    Ocspsvcctrs.ini| Not applicable| 2,828| 26-Jul-2012| 05:12| Not applicable| SPS| AMD64_MICROSOFT-WINDOWS-OCSP
    Ocspsvcctrs.ini| Not applicable| 2,464| 26-Jul-2012| 08:05| Not applicable| SPS| AMD64_MICROSOFT-WINDOWS-OCSP
    Ocspsvcctrs.ini| Not applicable| 2,480| 26-Jul-2012| 05:13| Not applicable| SPS| AMD64_MICROSOFT-WINDOWS-OCSP
    Ocspsvcctrs.ini| Not applicable| 2,460| 26-Jul-2012| 08:11| Not applicable| SPS| AMD64_MICROSOFT-WINDOWS-OCSP
    Ocspsvc.exe| 6.2.9200.21345| 272,384| 15-Jan-2015| 05:27| x64| SPS| AMD64_MICROSOFT-WINDOWS-OCSP
    Ocspsvcctrs.h| Not applicable| 1,569| 02-Jun-2012| 14:34| Not applicable| SPS| AMD64_MICROSOFT-WINDOWS-OCSP
    Ocspsvcctrs.ini| Not applicable| 2,918| 02-Jun-2012| 14:34| Not applicable| SPS| AMD64_MICROSOFT-WINDOWS-OCSP
    Ntoskrnl.exe| 6.2.9200.21821| 6,938,464| 30-Mar-2016| 01:34| x64| None| Not applicable
    Credssp.dll| 6.2.9200.21703| 20,480| 17-Nov-2015| 07:59| x64| SP_| AMD64_MICROSOFT-WINDOWS-SECURITY-CREDSSP
    Tspkg.dll| 6.2.9200.21703| 94,720| 17-Nov-2015| 08:01| x64| SP_| AMD64_MICROSOFT-WINDOWS-SECURITY-CREDSSP
    Tspkg.mof| Not applicable| 964| 02-Jun-2012| 14:33| Not applicable| SP_| AMD64_MICROSOFT-WINDOWS-SECURITY-CREDSSP
    Wdigest.dll| 6.2.9200.21703| 208,896| 17-Nov-2015| 08:01| x64| None| Not applicable
    Kerberos.dll| 6.2.9200.21820| 830,464| 29-Mar-2016| 21:48| x64| None| Not applicable
    Msv1_0.dll| 6.2.9200.21820| 317,952| 29-Mar-2016| 21:48| x64| None| Not applicable
    Shcore.dll| 6.2.9200.21703| 590,848| 17-Nov-2015| 08:00| x64| None| Not applicable
    Mrxsmb10.sys| 6.2.9200.21529| 281,600| 25-Jun-2015| 18:52| x64| None| Not applicable
    Mrxsmb20.sys| 6.2.9200.21548| 205,312| 11-Jul-2015| 17:07| x64| None| Not applicable
    Mrxsmb.sys| 6.2.9200.21342| 396,800| 06-Jan-2015| 23:17| x64| None| Not applicable
    Lsm.dll| 6.2.9200.21703| 439,808| 17-Nov-2015| 08:00| x64| None| Not applicable
    Workerdd.dll| 6.2.9200.21012| 14,848| 12-Apr-2014| 06:58| x64| None| Not applicable
    Usercpl.dll| 6.2.9200.21703| 1,043,968| 17-Nov-2015| 08:01| x64| None| Not applicable
    Usercpl.ptxml| Not applicable| 789| 11-Oct-2012| 00:40| Not applicable| None| Not applicable
    Winlogon.exe| 6.2.9200.21703| 578,048| 17-Nov-2015| 08:01| x64| None| Not applicable
    Sspicli.dll| 6.2.9200.20984| 99,840| 10-Mar-2014| 01:34| x86| None| Not applicable
    Ntdll.dll| 6.2.9200.21821| 1,413,120| 30-Mar-2016| 00:14| x86| None| Not applicable
    Wdigest.dll| 6.2.9200.21703| 176,640| 17-Nov-2015| 08:09| x86| None| Not applicable
    Kerberos.dll| 6.2.9200.21821| 666,624| 29-Mar-2016| 23:58| x86| None| Not applicable
    Msv1_0.dll| 6.2.9200.21821| 274,944| 29-Mar-2016| 23:58| x86| None| Not applicable
    Advapi32.dll| 6.2.9200.21821| 704,000| 29-Mar-2016| 23:57| x86| None| Not applicable
    Adtschema.dll| 6.2.9200.21289| 719,360| 10-Nov-2014| 03:40| x86| None| Not applicable
    Msaudite.dll| 6.2.9200.21269| 146,944| 11-Oct-2014| 04:35| x86| None| Not applicable
    Msobjs.dll| 6.2.9200.16384| 61,952| 26-Jul-2012| 02:47| x86| None| Not applicable
    Credssp.dll| 6.2.9200.21703| 17,408| 17-Nov-2015| 08:08| x86| SP_| X86_MICROSOFT-WINDOWS-SECURITY-CREDSSP
    Tspkg.dll| 6.2.9200.21703| 76,800| 17-Nov-2015| 08:09| x86| SP_| X86_MICROSOFT-WINDOWS-SECURITY-CREDSSP
    Tspkg.mof| Not applicable| 964| 02-Jun-2012| 14:33| Not applicable| SP_| X86_MICROSOFT-WINDOWS-SECURITY-CREDSSP
    Shcore.dll| 6.2.9200.21703| 460,800| 17-Nov-2015| 08:09| x86| None| Not applicable
    Usercpl.dll| 6.2.9200.21703| 961,536| 17-Nov-2015| 08:09| x86| None| Not applicable
    Usercpl.ptxml| Not applicable| 789| 11-Oct-2012| 00:42| Not applicable| None| Not applicable

7.6 High

AI Score

Confidence

High

0.956 High

EPSS

Percentile

99.4%