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The Windows December 2023 security updates fix a 0-day vulnerability

Microsoft released security updates for all supported Windows operating systems and other company products on the December 2023 Patch Day. The company fixed 36 unique Microsoft product vulnerabilities and six non Microsoft product vulnerabilities on the last Patch Day of the year 2023.

It is a smaller Patch Day that fixes three critical security issues in all supported Windows client and server products. The update fixes one publicly disclosed 0-day vulnerability. Listed as CVE-2023-20588, it affects devices with AMD processors only.

Our overview is designed to be a resource for system administrators and home users alike. It includes information about all major security updates that Microsoft released. You find links to support pages and resources, the list of known issues, direct download links and more listed below.

Check out the November 2023 Security update overview here.

Microsoft Windows Security Updates: November 2023

Here is a link to an Excel spreadsheet that lists information about the released security updates on the December 2023 Microsoft Patch Day. Follow this link to download an archive file that contains the spreadsheet:  Microsoft Windows security updates December 2023

Executive Summary

Each supported version of Windows and their critical vulnerabilities are listed below.

  • Windows 10 version 22H2: 15 vulnerabilities, 3 critical and 12 important.
    • Internet Connection Sharing (ICS) Remote Code Execution Vulnerability -- CVE-2023-35630
    • Windows MSHTML Platform Remote Code Execution Vulnerability -- CVE-2023-35628
    • Internet Connection Sharing (ICS) Remote Code Execution Vulnerability -- CVE-2023-35641
  • Windows 11 version 22H2:  17 vulnerabilities, 3 critical and 14 important
    • same as Windows 10 version 22H2
  • Windows 11 version 23H2:  18 vulnerabilities, 3 critical and 15 important
    • same as Windows 10 version 22H2

Windows Server products

  • Windows Server 2008 R2 (extended support only): 15 vulnerabilities: 3 critical and 12 important
    • Internet Connection Sharing (ICS) Remote Code Execution Vulnerability -- CVE-2023-35630
    • Windows MSHTML Platform Remote Code Execution Vulnerability -- CVE-2023-35628
    • Internet Connection Sharing (ICS) Remote Code Execution Vulnerability -- CVE-2023-35641
  • Windows Server 2012 R2 (extended support only): 61 vulnerabilities: 11 critical and 50 important
    • Not published (yet)
  • Windows Server 2016: 17 vulnerabilities: 3 critical and 14 important
    • same as Windows Server 2008 R2
  • Windows Server 2019: 19 vulnerabilities: 3 critical and 16 important
    • same as Windows Server 2008 R2
  •  Windows Server 2022: 18 vulnerabilities: 3 critical and 15 important.
    • same as Windows Server 2008 R2

Windows Security Updates

Windows 10 version 22H2

Updates and improvements:

  • Security updates.
  • Includes all non-security changes of the November 30, 2023 preview update  for the operating system.

Windows 11 version 22H2 and 23H2

Updates and improvements:

  • This update makes miscellaneous [unspecified] security improvements to internal OS functionality.
  • Includes all non-security updates of the December 2023 Preview Update, including:
    • Support for multiple displays when using Copilot in Windows (even though issues on multi-monitor systems is still listed as a known issue).
    • Alt-Tab supports Copilot in Windows now.
    • Windows Spotlight will become the default background on Windows to replace the inbox Windows image.
    • Account-related notifications will display in Settings > Home after the update.

Security updates

2023-12 Cumulative Update for Windows 10 Version 1507 (KB5033379)

2023-12 Cumulative Update for Windows 10 Version 1607 (KB5033373)

2023-12 Cumulative Update for Windows 10 Version 1809 (KB5033371)

2023-12 Cumulative Update for Microsoft server operating system version 21H2 for x64-based Systems (KB5033118)

2023-12 Cumulative Update for Windows 10 Version 22H2 and Windows 10 Version 21H2 (KB5033372)

2023-12 Cumulative Update for Windows 11 (KB5033369)

2023-12 Servicing Stack Update for Windows Server 2008 (KB5033466)

Windows Server

2023-12 Cumulative Security Update for Internet Explorer Windows Server 2012 R2, Windows Server 2012, Windows Embedded Standard 7, Windows Server 2008 R2, and Windows Server 2008 (KB5033376)

2023-12 Security Only Quality Update for Windows Embedded Standard 7 and Windows Server 2008 R2 (KB5033424)

2023-12 Security Monthly Quality Rollup for Windows Embedded Standard 7 and Windows Server 2008 R2 (KB5033433)

2023-12 Security Monthly Quality Rollup for Windows Server 2008 (KB5033422)

2023-12 Security Only Quality Update for Windows Server 2008 (KB5033427)

2023-12 Security Monthly Quality Rollup for Windows Server 2012 R2 (KB5033420)

2023-12 Security Monthly Quality Rollup for Windows Server 2012 (KB5033429)

2023-12 Cumulative security Hotpatch for Azure Stack HCI, version 21H2 and Windows Server 2022 Datacenter: Azure Edition for x64-based Systems (KB5033464)

Non-Security updates

None listed

Known Issues

Windows 10 version 22H2

Description: Desktop icons may be moved around unexpectedly between monitors when using Copilot on more than one monitor. Users may also experience "other alignment issues" according to Microsoft.

Workaround: none. Microsoft may disable Copilot on multimonitor devices.

Description: Copilot in Windows is not supported if the taskbar is located vertically on the right or left side of the screen.

Workaround: align the taskbar horizontally, either at the top or bottom of the screen.

(OLD) Description: Using the FixedDrivesEncryptionType or SystemDrivesEncryptionType policy settings in the BitLocker configuration service provider (CSP) node in mobile device management (MDM) apps might incorrectly show a 65000 error in the "Require Device Encryption" setting for some devices in your environment.

Workaround: this is a reporting issue only according to Microsoft. Microsoft suggests to set the "Enforce drive encryption type on operating system drives" or the "Enforce drive encryption on fixed drives" policies to not configured as a workaround.

Windows 11 version 22H2 and 23H2

Description: Microsoft Narrator may not start when installing Windows 11 from physical media or disk images.

Workaround: Microsoft is working on a resolution.

(OLD) Description: Users who use multiple monitors on their Windows devices may notice that desktop icons move around unexpectedly. They may, for instance, move between monitors.

Workaround: Microsoft "may" have disabled Windows Copilot on multi-monitor devices until a solution is found.

(OLD) Description: The color font format COLRv1 does not render properly. It is used to display emoji with a 3D-like appearance.

Workaround: none at the time. Microsoft is working on a solution.

(OLD) Description: Using the FixedDrivesEncryptionType or SystemDrivesEncryptionType policy settings in the BitLocker configuration service provider (CSP) node in mobile device management (MDM) apps might incorrectly show a 65000 error in the "Require Device Encryption" setting for some devices in your environment.

Workaround: this is a reporting issue only according to Microsoft. Microsoft suggests to set the "Enforce drive encryption type on operating system drives" or the "Enforce drive encryption on fixed drives" policies to not configured as a workaround.

Security advisories and updates

Microsoft Office Updates

You find Office update information here.

How to download and install the December 2023 security updates

Microsoft Windows 10 Security updates December 2023

Security updates roll out to all non-managed Windows devices automatically by default. This process may take a while to reach all devices. Administrators may download the updates as soon as they are released, either via Windows Update or by downloading the updates manually.

Tipcreate a backup before you install updates

To update using Windows Update, use the following guide:

  1. Select Start, type Windows Update and load the Windows Update item that is displayed.
  2. Select check for updates to run a manual check for updates.

Managed systems receive updates when system administrators allow them to be distributed to managed devices.

Direct update downloads

Below are resource pages with direct download links, if you prefer to download the updates to install them manually.

Windows 10 version 22H2

  • KB5033372 -- 2023-12 Cumulative Update for Windows 10 Version 21H2

Windows 11 version 22H2

  • KB5033375 -- 2023-12 Cumulative Update for Windows 11 version 22H2
Windows 11 version 23H2
  • KB5033375 -- 2023-12 Cumulative Update for Windows 11 version 23H2

Additional resources

Thank you for being a Ghacks reader. The post The Windows December 2023 security updates fix a 0-day vulnerability appeared first on gHacks Technology News.

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