#Patch Tuesday updates for Windows 7 and Windows 8.1, September 8, 2020

Besides the updates for Windows 10, Microsoft today released security updates for Windows 7 (KB4577051) and Windows 8.1 (KB4577066). Here are the fixes included in them.

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Windows 8.1

For Windows 8.1, the monthly rollup update KB4577066 comes with the following changes.

• Updates time zone information for Yukon, Canada.
• Addresses an issue when you evaluate the compatibility status of the Windows ecosystem to help ensure application and device compatibility for all updates to Windows.
• Addresses a security vulnerability issue with user proxies and HTTP-based intranet servers. After you install this update, HTTP-based intranet servers cannot leverage a user proxy to detect updates by default. Scans that use these servers will fail if the clients do not have a configured system proxy. If you must leverage a user proxy, you must configure the behavior by using the Windows Update policy “Allow user proxy to be used as a fallback if detection using system proxy fails.” This change does not affect customers who secure their Windows Server Update Services (WSUS) servers that use the Transport Layer Security (TLS) or Secure Sockets Layer (SSL) protocols. For more information, see Improving security for devices receiving updates via WSUS.
• Security updates to Windows Media, Windows Input and Composition, Windows App Platform and Frameworks, Windows Graphics, Windows Cloud Infrastructure, Windows Authentication, Windows Cryptography, Windows Fundamentals, Windows Kernel, Windows Hybrid Cloud Networking, Windows Peripherals, Windows Storage and Filesystems, Windows Network Security and Containers, Windows Update Stack, the Microsoft Scripting Engine, and Windows SQL components.

There is also a security-only update KB4577071.

Windows 7

KB4577051 for Windows 7 includes almost the same changes, but it is only available for ESU subscribers.

• Updates time zone information for Yukon, Canada.
• Addresses a security vulnerability issue with user proxies and HTTP-based intranet servers. After you install this update, HTTP-based intranet servers cannot leverage a user proxy to detect updates by default. Scans that use these servers will fail if the clients do not have a configured system proxy. If you must leverage a user proxy, you must configure the behavior by using the Windows Update policy “Allow user proxy to be used as a fallback if detection using system proxy fails.” This change does not affect customers who secure their Windows Server Update Services (WSUS) servers that use the Transport Layer Security (TLS) or Secure Sockets Layer (SSL) protocols. For more information, see Improving security for devices receiving updates via WSUS.
• Security updates to Windows App Platform and Frameworks, Windows Graphics, Windows Media, Windows Cloud Infrastructure, Windows Authentication, Windows Cryptography, Windows Kernel, Windows Hybrid Cloud Networking, Windows Peripherals, Windows Storage and Filesystems, Windows Network Security and Containers, the Microsoft Scripting Engine, and Windows SQL components.

KB4577053 is the appropriate security-only update for Windows 7.

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