The April security updates have been released and consist of 74 CVE's and one security advisory (for Adobe Flash Player) in which 13 are rated Critical and 61 are rated Important. None are listed as publicly known but two are listed as being under active attack at the time of release.
In addition to a Servicing Stack Update (See the "Additional Update Notes" below for more information.), the updates apply to the following: Adobe Flash Player, Internet Explorer, Microsoft Edge, Microsoft Windows, Microsoft Office and Microsoft Office SharePoint, ChakraCore, ASP.NET, Microsoft Exchange Server, Team Foundation Server, Azure DevOps Server, Open Enclave SDK, and Windows Admin Center.
Important: Windows 10, version 1709, reached end of service today, April 9, 2019, for devices running Windows 10 Home, Pro, Pro for Workstation, and IoT Core editions. These devices will no longer receive monthly security and quality updates that contain protection from the latest security threats. To continue receiving security and quality updates, updating to the latest version of Windows 10 is strongly recommended. Note, however, that Windows 10 Enterprise, Education, and IoT Enterprise editions will continue to receive servicing for 12 months at no cost per the lifecycle announcement on October 2018.
Known Issues In the April Security Update:
| KB Article | Applies To |
|---|---|
| 4487563 | Microsoft Exchange Server 2019, 2016, and 2013 |
| 4491413 | Update Rollup 27 for Exchange Server 2010 Service Pack 3 |
| 4493441 | Windows 10 version 1709, Windows Server Version 1709 |
| 4493446 | Windows 8.1, Windows Server 2012 R2 (Monthly Rollup) |
| 4493448 | Windows 7 Service Pack 1, Windows Server 2008 R2 Service Pack 1 (Security-only update) |
| 4493450 | Windows Server 2012 (Security-only Rollup) |
| 4493451 | Windows Server 2012 (Monthly Rollup) |
| 4493458 | Windows Server 2008 Service Pack 2 (Security-only update) |
| 4493464 | Windows 10 version 1803, Windows Server Version 1803 |
| 4493467 | Windows 8.1, Windows Server 2012 R2 (Security-only update) |
| 4493470 | Windows 10 version 1607, Windows Server 2016 |
| 4493471 | Windows Server 2008 Service Pack 2 (Monthly Rollup) |
| 4493472 | Windows 7 Service Pack 1, Windows Server 2008 R2 Service Pack 1 (Monthly Rollup) |
| 4493474 | Windows 10 version 1703 |
| 4493509 | Windows 10 version 1809, Windows Server 2019 |
| 4493730 | Windows Server 2008 SP2 |
| 4493435 | Internet Explorer Cumulative Update |
Recommended Reading:
See Dustin Childs review and analysis in Zero Day Initiative — The April 2019 Security Update Review.
For more information about the updates released today, see https://portal.msrc.microsoft.com/en-us/security-guidance/summary. Updates can be sorted by OS from the search box. Information about the update for Windows 10 is available at Windows 10 Update history.
Additional Update Notes:
- Adobe Flash Player -- For Windows Server 2012, Windows 8.1, Windows Server 2012 R2, Windows RT 8.1 and Windows 10, Adobe Flash Player is now a security bulletin rather than a security advisory and is included with the updates as identified above.
- MSRT -- Microsoft released an updated version of the Microsoft Windows Malicious Software Removal Tool on Windows Update, Microsoft Update, Windows Server Update Services, and the Download Center. Note: Users who are paranoid about the remote possibility of a FP can opt to run this tool from a Command Prompt, appending a /N parameter [for "detect only" mode].
- Servicing Stack Updates -- A list of the latest servicing stack updates for each operating system can be found in ADV990001. This list will be updated whenever a new servicing stack update is released. It is important to install the latest servicing stack update.
- Windows 10 updates are cumulative. The monthly security release includes all security fixes for vulnerabilities that affect Windows 10, in addition to non-security updates. The updates are available via the Microsoft Update Catalog.
- Updates for Windows RT 8.1 and Microsoft Office RT software are only available via Windows Update.
- For information on lifecycle and support dates for Windows 10 operating systems, please see Windows Lifecycle Facts Sheet.
References
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