Microsoft May 2019 Security Updates

The May security updates have been released and consist of 79 CVEs along with two advisories. Of these 79 CVEs, 22 are rated Critical and 57 are rated Important in severity. Two of these bugs are listed as publicly known and one is listed as under active attack at the time of release.

The updates address Remote Code Execution, Elevation of Privilege, Security Feature Bypass, Information Disclosure, Denial of Service, Spoofing, and Security Feature Bypass and apply to the following:  The updates cover Internet Explorer, Edge, Windows, ChakraCore, Microsoft Office and Microsoft Office Services and Web Apps, .NET Framework and ASP.NET, Skype for Android, Azure DevOps Server, and the NuGet Package Manager.

Edit Note:  Due to the severity of CVE-2019-0708, Microsoft also released KB 4500331 for versions of Windows that no longer receive mainstream support:  Windows XP SP3 x86, Windows XP Professional X64 SP2, Windows XP Embedded SP3 x86 as well as Windows Server 2003.

Known Issues:  See the Known Issues and accompanying work-around in the KB Articles for your version of Windows 10:

• Windows 10, Version 1809:  KB4494441 (OS Build 17763.503). Prerequisite: The servicing stack update (SSU) (KB4499728) must be installed before installing the latest cumulative update (LCU). The LCU will not be reported as applicable until the SSU is installed. For more information, see Servicing stack updates.
• Windows 10, Version 1803:  KB4499167 (OS Build 17134.765)

Recommended Reading:  

See Dustin Childs review and analysis in Zero Day Initiative — The May 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.
• Windows 8.1 Update History 
• Updates for Windows RT 8.1 and Microsoft Office RT software are only available via Windows Update.
• Windows 7 SP1 Update Histolry
• For information on lifecycle and support dates for Windows 10 operating systems, please see Windows Lifecycle Facts Sheet.

References

• Security Update FAQ
• Security Updates Guide

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