MS17-012: Description of the security update for Microsoft Windows: March 14, 2017

Summary

This security update resolves vulnerabilities in Microsoft Windows. The most severe of the vulnerabilities could allow remote code execution if an attacker runs a specially crafted application that connects to an iSNS Server and then issues malicious requests to the server.

To learn more about the vulnerability, see Microsoft Security Bulletin MS17-012.

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Important

• 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 Windows Update FAQ.

Method 2: Microsoft Update Catalog

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

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How to obtain help and support for this security update

Help for installing updates: Windows Update FAQ

Security solutions for IT professionals: TechNet Security Support and Troubleshooting

Help for protecting your Windows-based computer from viruses and malware: Microsoft Secure

Local support according to your country: International Support

File InformationFile name	SHA1 hash	SHA256 hash
Windows6.0-KB4012021-x64.msu	651185596D580B5DF86FFFE44A1C6C4AB93D1454	EA5486FBABCAB78CAEB6A665F04BB56F53D08F9C5A6422FB32B2B2835A658C76
Windows6.0-KB4012021-x86.msu	266D72870FE4AC9ED0C4894426C581E2B8772F2E	7CE1A13935114C7FC48F5FB5F789663F58211B6A8D06C28E4DAD8FD9F03E8E7C

File name	File version	File size	Date	Time	Platform
Isns.mof	Not applicable	10,687	11-Apr-2009	02:12	Not applicable
Isnscli.exe	6.0.6002.18005	29,696	11-Apr-2009	07:10	x64
Isnsdll.dll	6.0.6002.18005	58,880	11-Apr-2009	07:11	x64
Isnssrv.dll	6.0.6002.19741	95,232	09-Feb-2017	17:21	x64
Isnsui.exe	6.0.6002.18005	40,448	11-Apr-2009	07:10	x64
Isnsuid.dll	6.0.6002.18005	66,048	11-Apr-2009	07:11	x64
Isnswmi.dll	6.0.6002.18005	48,640	11-Apr-2009	07:11	x64
Isns.mof	Not applicable	10,687	09-Feb-2017	14:24	Not applicable
Isnscli.exe	6.0.6002.24065	30,208	09-Feb-2017	16:00	x64
Isnsdll.dll	6.0.6002.24065	58,880	09-Feb-2017	17:40	x64
Isnssrv.dll	6.0.6002.24065	95,232	09-Feb-2017	17:40	x64
Isnsui.exe	6.0.6002.24065	40,448	09-Feb-2017	16:00	x64
Isnsuid.dll	6.0.6002.24065	66,048	09-Feb-2017	17:40	x64
Isnswmi.dll	6.0.6002.24065	48,640	09-Feb-2017	17:40	x64
File name	File version	File size	Date	Time	Platform
—	—	—	—	—	—
Isns.mof	Not applicable	10,687	11-Apr-2009	02:04	Not applicable
Isnscli.exe	6.0.6002.18005	25,600	11-Apr-2009	06:27	x86
Isnsdll.dll	6.0.6002.18005	52,224	11-Apr-2009	06:28	x86
Isnssrv.dll	6.0.6002.19741	70,144	09-Feb-2017	17:04	x86
Isnsui.exe	6.0.6002.18005	39,936	11-Apr-2009	06:27	x86
Isnsuid.dll	6.0.6002.18005	63,488	11-Apr-2009	06:28	x86
Isnswmi.dll	6.0.6002.18005	36,352	11-Apr-2009	06:28	x86
Isns.mof	Not applicable	10,687	09-Feb-2017	14:24	Not applicable
Isnscli.exe	6.0.6002.24065	26,112	09-Feb-2017	15:36	x86
Isnsdll.dll	6.0.6002.24065	52,224	09-Feb-2017	16:25	x86
Isnssrv.dll	6.0.6002.24065	70,144	09-Feb-2017	16:25	x86
Isnsui.exe	6.0.6002.24065	39,936	09-Feb-2017	15:36	x86
Isnsuid.dll	6.0.6002.24065	63,488	09-Feb-2017	16:25	x86
Isnswmi.dll	6.0.6002.24065	36,352	09-Feb-2017	16:25	x86