Windows 10: KB5004442—Manage changes for Windows DCOM Server Security Feature Bypass CVE-2021-26414

Hi,I would like to know the ways to test the DCOM impact on a system once the hardening changes are effective.Thanks,Bharathy

:)

 

Windows Distributed Component Object Model (DCOM) Hardening changes

Read more:

• https://docs.microsoft.com/en-us/win...ge-center#2817
• https://support.microsoft.com/en-us/...e-37ed901c769c

 

Microsoft December 2021 Security Updates

December 2021 Security Updates

Updates this Month

This release consists of security updates for the following products, features and roles.

• Apps
  
• ASP.NET Core & Visual Studio
  
• Azure Bot Framework SDK
  
• BizTalk ESB Toolkit
  
• Internet Storage Name Service
  
• Microsoft Defender for IoT
  
• Microsoft Devices
  
• Microsoft Edge (Chromium-based)
  
• Microsoft Local Security Authority Server (lsasrv)
  
• Microsoft Message Queuing
  
• Microsoft Office
  
• Microsoft Office Access
  
• Microsoft Office Excel
  
• Microsoft Office SharePoint
  
• Microsoft PowerShell
  
• Microsoft Windows Codecs Library
  
• Office Developer Platform
  
• Remote Desktop Client
  
• Role: Windows Fax Service
  
• Role: Windows Hyper-V
  
• Visual Studio Code
  
• Visual Studio Code - WSL Extension
  
• Windows Common Log File System Driver
  
• Windows Digital TV Tuner
  
• Windows DirectX
  
• Windows Encrypting File System (EFS)
  
• Windows Event Tracing
  
• Windows Installer
  
• Windows Kernel
  
• Windows Media
  
• Windows Mobile Device Management
  
• Windows NTFS
  
• Windows Print Spooler Components
  
• Windows Remote Access Connection Manager
  
• Windows Storage
  
• Windows Storage Spaces Controller
  
• Windows SymCrypt
  
• Windows TCP/IP
  
• Windows Update Stack
  

Please note the following information regarding the security updates:

Security Update Guide Blog Posts

Date Blog Post

February 9, 2021 Continuing to Listen: Good News about the Security Update Guide API

January 13, 2021 Security Update Guide Supports CVEs Assigned by Industry Partners

December 8, 2020 Security Update Guide: Let’s keep the conversation going

November 9, 2020 Vulnerability Descriptions in the New Version of the Security Update Guide

Relevant Information

• 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. For information on lifecycle and support dates for Windows 10 operating systems, please see Windows Lifecycle Facts Sheet.
  
• Microsoft is improving Windows Release Notes. For more information, please see What's next for Windows release notes.
  
• 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.
  
• In addition to security changes for the vulnerabilities, updates include defense-in-depth updates to help improve security-related features.
  
• Customers running Windows 7, Windows Server 2008 R2, or Windows Server 2008 need to purchase the Extended Security Update to continue receiving security updates. See 4522133 for more information.
  

FAQs, Mitigations, and Workarounds

The following CVEs have FAQs, Mitigations, or Workarounds. You can see these in more detail from the Vulnerabilities tab by selecting FAQs, Mitigations and Workarounds columns in the Edit Columns panel.

• CVE-2021-40452
  
• CVE-2021-40453
  
• CVE-2021-4052
  
• CVE-2021-4053
  
• CVE-2021-4054
  
• CVE-2021-4055
  
• CVE-2021-4056
  
• CVE-2021-4057
  
• CVE-2021-4058
  
• CVE-2021-4059
  
• CVE-2021-4061
  
• CVE-2021-4062
  
• CVE-2021-4063
  
• CVE-2021-4064
  
• CVE-2021-4065
  
• CVE-2021-4066
  
• CVE-2021-4067
  
• CVE-2021-4068
  
• CVE-2021-41360
  
• CVE-2021-41365
  
• CVE-2021-42293
  
• CVE-2021-42294
  
• CVE-2021-42295
  
• CVE-2021-42309
  
• CVE-2021-42310
  
• CVE-2021-42311
  
• CVE-2021-42312
  
• CVE-2021-42313
  
• CVE-2021-42314
  
• CVE-2021-42315
  
• CVE-2021-43216
  
• CVE-2021-43217
  
• CVE-2021-42320
  
• CVE-2021-43214
  
• CVE-2021-43215
  
• CVE-2021-43217
  
• CVE-2021-43222
  
• CVE-2021-43224
  
• CVE-2021-43227
  
• CVE-2021-43235
  
• CVE-2021-43236
  
• CVE-2021-43243
  
• CVE-2021-43244
  
• CVE-2021-43255
  
• CVE-2021-43256
  
• CVE-2021-43875
  
• CVE-2021-43880
  
• CVE-2021-43882
  
• CVE-2021-43888
  
• CVE-2021-43889
  
• CVE-2021-43890
  
• CVE-2021-43899
  
• CVE-2021-43905
  

Known Issues

You can see these in more detail from the Deployments tab by selecting Known Issues column in the Edit Columns panel.

For more information about Windows Known Issues, please see Windows message center (links to currently-supported versions of Windows are in the left pane).

KB Article Applies To

5008207 Windows 10, Version 1607, Windows Server 2016

5008212 Windows 10, Version 2004, Windows Server, Version 2004, Windows 10, Version 20H2, Windows Server, Version 20H2, Windows 10, Version 21H1

5008218 Windows 10, Version 1809, Windows Server 2019

5008223 Windows Server 2022

5008244 Windows 7, Windows Server 2008 R2 (Monthly Rollup)

5008255 Windows Server 2012 (Security-only update)

5008263 Windows 8.1, Windows Server 2012 R2 (Monthly Rollup)

5008271 Windows Server 2008 (Security-only update)

5008274 Windows Server 2008 (Monthly Rollup)

5008277 Windows Server 2012 (Monthly Rollup)

5008282 Windows 7, Windows Server 2008 R2 (Security-only update)

5008285 Windows 8.1, Windows Server 2012 R2 (Security-only update)

Released: Dec 14, 2021

December 2021 Security Updates - Release Notes - Security Update Guide - Microsoft

 

DCOM Error Event 10036 in PC Client Side

Currently we are connecting OPC DA client to an remote OPC DA server using DCOM technology. OPC DA client can be connected to OPC DA Server. We got all tags from OPC DA Server and the values are good in OPC DA client but we found that there are DCOM errors detected in PC Client's Windows Event Viewer every 2 minutes as long as OPC DA client accesses the OPC DA Server.





I read this article and the error 10036 should be on the PC server side but it's strange that the errors appear on the PC client side.

KB5004442—Manage changes for Windows DCOM Server Security Feature Bypass (CVE-2021-26414)





This is the example error that I got in PC client side, it mentioned the PC client device name but "from [OPC DA Server IP]"

"The server-side authentication level policy does not allow the user [PC Client Device Name\User Name] SID XXXXXX from address [OPC DA Server IP] to activate DCOM server. Please raise the activation authentication level at least to RPC_C_AUTHN_LEVEL_PKT_INTEGRITY in client application."

Could you please suggest how to fix the DCOM error detected in PC Client's Windows Event Viewer? Will the DCOM error affect connection / data transmission between Server and Client (such as causing error in Windows OS Server in the future)? Or we can ignore this error (because the connection between server-client is okay now)?

Thank you