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This security update resolves a vulnerability in Microsoft .NET Framework that could allow remote code execution when Microsoft .NET Framework doesn't validate input correctly. An attacker who successfully exploits this vulnerability could take control of an affected system. The attacker could then install programs; view, change, or delete data; or create new accounts that use full user rights. Users whose accounts are configured to have fewer user rights on the system could be less affected than users who are granted administrative user rights.
To exploit the vulnerability, an attacker has to pass specific input to an application that uses susceptible .NET Framework methods.
This security update addresses the vulnerability by correcting how .NET Framework validates input.
To learn more about this vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2018-8540.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.
For more information about this security update as it relates to Windows 7 Service Pack 1 (SP1) and Windows Server 2008 R2 SP1, see the following article in the Microsoft Knowledge Base:
4471987 Security and Quality Rollup updates for .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, and 4.7.2 for Windows 7 SP1 and Windows Server 2008 R2 SP1 (KB 4471987)
For more information about this security update as it relates to Windows Server 2008 Service Pack 2 (SP2), see the following article in the Microsoft Knowledge Base:
4471990 Security and Quality Rollup updates for .NET Framework 3.5 SP1, 4.5.2, and 4.6 for Windows Server 2008 SP2 (KB 4471990)
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 get security updates automatically, see Windows Update: FAQ.
On your WSUS server, follow these steps:
The updates are now available for installation through WSUS.
For deployment details for this security update, go to the following article in the Microsoft Knowledge Base:
20181211 Security update deployment information: December 11, 2018
Note We don't recommend that you remove any security update. To remove this update, use the Programs and Features item in Control Panel.
This update does not require a system restart after you apply it unless files that are being updated are locked or are being used.
This update replaces previously released updates KB 4457918, KB 4457921, KB 4467240, KB 4467243, KB 4467224, and KB 4467227.
| File name | SHA1 hash | SHA256 hash |
|---|---|---|
| NDP45-KB4470637-x86.exe | D2FE604BDB5BFB37322904EDF982D270B9D750C9 | 6D42E4D0E2D84AC0EF38A3B3C836F0FF1A2D0457D15DC319A789BA4C84485848 |
| NDP45-KB4470637-x64.exe | 3A008835532612473C1B6AD89AB15C324B66C0F9 | AE91CBB3D35C21D30E0ECD90D286393CEEC831FD831CDDA7EDDFEF5453D0D374 |
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