November 26, 2022

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Patch Tuesday contains 6 Home windows zero-day flaws; patch now!

Microsoft on Tuesday launched a tightly targeted however nonetheless vital replace that addresses 68 reported (some publicly) vulnerabilities. Sadly, this month brings a brand new file: six zero-day flaws affecting Home windows. In consequence, now we have added each the Home windows and Trade Server updates to our “Patch Now” schedule. Microsoft additionally printed a “protection in depth” advisory (ADV220003) to assist safe Workplace deployments. And there are a small variety of Visible Studio, Phrase, and Excel updates so as to add to your commonplace patch launch schedule.

You could find extra info on the dangers of deploying these Patch Tuesday updates in our infographic.

Recognized points

Every month, Microsoft features a listing of identified points that relate to the working system and platforms included on this replace cycle. There are two main reported points with Home windows 11 — each associated to deploying and updating Home windows 22H2 machines:

  1. Customers updating to Home windows 22H2 and the replace or the Out of Field Expertise might not full efficiently. Provisioning packages utilized throughout preliminary setup are probably to be affected. For extra info, see Provisioning packages for Home windows.
  2. Community transfers of enormous (multi-gigabyte) recordsdata would possibly take longer than anticipated to complete on the most recent model of Home windows 11. You usually tend to expertise this challenge copying recordsdata to Home windows 11 22H2 from a community share through Server Message Block (SMB), however native file copy may also be affected.

Along with these points, Microsoft SharePoint Server has skilled two points with the November and September updates:

  • Internet Half Pages Internet Service strategies could also be affected by the September 2022 safety replace. For extra info, see KB5017733.
  • Some SharePoint 2010 workflow situations could also be blocked. For extra info, see KB5017760.

Main revisions

Technically talking, Microsoft printed eight revisions this month, all for the Chromium Edge browser. In follow, these “revisions” had been commonplace updates to the Microsoft Edge browser and have been included in our Browser part. No different revisions to earlier patches or updates had been launched this month.

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Mitigations and workarounds

A single work-around has been printed for the November Patch Tuesday: 

  • CVE-2022-37976: Energetic Listing Certificates Providers Elevation of Privilege Vulnerability. A system is susceptible provided that each the Energetic Listing Certificates Providers function and the Energetic Listing Area Providers function are put in on a server within the community. Setting LegacyAuthenticationLevel – Win32 apps | Microsoft Docs to five= RPC_C_AUTHN_LEVEL_PKT_INTEGRITY would possibly defend most processes on the machine in opposition to this assault. For extra info see the next part on Setting System-Extensive Safety Utilizing DCOMCNFG.

No different mitigations or workarounds for Microsoft platforms had been launched.

Every month, the Readiness workforce analyzes the patches utilized to Home windows, Microsoft Workplace, and associated expertise/improvement platforms. We have a look at every replace, the person modifications and the potential impression on enterprise environments. These testing situations supply some structured steering on learn how to greatest deploy Home windows updates to your atmosphere.

Excessive Threat: This month, Microsoft didn’t report any high-risk performance modifications, that means it has not up to date nor made main modifications to core APIs, performance or any of the core elements or purposes included within the Home windows desktop and server ecosystems.

Extra typically, given the broad nature of this replace (Workplace and Home windows), we propose testing the next Home windows options and elements:

  • Hyper-V Replace: a easy take a look at of beginning and stopping VMs and remoted containers will suffice for this minor replace.
  • Microsoft PPTP VPN: train your typical VPN situations (join/disconnect/restart) and attempt to simulate a disruption. Opposite to earlier suggestions, no prolonged trials are required.
  • Microsoft Picture App: make sure that your RAW picture extensions work as anticipated.
  • Microsoft ReFS and ExFat: a typical CRUD take a look at (Create/Rename/Replace/Delete) will suffice this month.

There have been a number of updates to how group insurance policies are applied on  Home windows platforms this month. We propose spending a while guaranteeing that the next options are working:

  • GPO coverage creation/deployment and deletion.
  • Modifying GPO insurance policies, with a validation verify to see whether or not these up to date insurance policies have been utilized to the complete OU.
  • Be sure that all symbolic hyperlinks are working as anticipated (redirects to person knowledge).

And, with all testing regimes required when making modifications to Microsoft GPOs, bear in mind to make use of the “gpupdate /drive” command to make sure that all modifications have been dedicated to the goal system.

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Who makes use of the Home windows Overlay Filter Characteristic?

System engineers, that is who. When you have needed to construct shopper machines for big automated enterprise deployments you will have to work with the Home windows Overlay Filter (WoF) driver for WIM boot recordsdata. WoF  permits for considerably higher compression ratios of set up recordsdata and was launched in Home windows 8. In case you are in the course of a big client-side deployment effort this month, make sure that your WIM recordsdata are nonetheless accessible after the November replace. When you’re searching for extra info on this key Home windows deployment function, take a look at this weblog submit on WoF knowledge compression.

Until in any other case specified, we should always assume that every Patch Tuesday replace would require testing of core printing features together with:

  • printing from instantly related printers;
  • giant print jobs from servers (particularly if they’re additionally area controllers);
  • distant printing (utilizing RDP and VPN).

Every month, we break down the replace cycle into product households (as outlined by Microsoft) with the next primary groupings:

  • Browsers (Microsoft IE and Edge);
  • Microsoft Home windows (each desktop and server);
  • Microsoft Workplace;
  • Microsoft Trade Server;
  • Microsoft Growth platforms ( ASP.NET Core, .NET Core and Chakra Core);
  • Adobe (retired???, perhaps subsequent yr).

Browsers

Together with final week’s mid-cycle replace to Microsoft Edge (Chromium) there are 10 updates to the Chromium core and eight patches to Edge, for a complete of 18 modifications. For the ten Chrome updates, you may discuss with the Chrome Safety web page for extra particulars. You could find hyperlinks to the entire Microsoft updates right here: CVE-2022-3652, CVE-2022-3653, CVE-2022-3654, CVE-2022-3655, CVE-2022-3656, CVE-2022-3657, CVE-2022-3660, CVE-2022-3661. All 18 updates are low-profile, low-impact updates to the browser stack and could be added to your commonplace desktop replace schedule.

Microsoft Home windows

There’s good and unhealthy information this month for Home windows. The unhealthy information is now we have six Home windows zero-days with each publicly reported vulnerabilities and reported exploits within the wild. The excellent news is that solely one of many vulnerabilities (which is unimaginable) is rated essential by Microsoft. This month’s replace covers the next Home windows options:

  • Home windows Scripting (the Home windows scripting host or object);
  • Networking (significantly how HTTPS is dealt with);
  • Home windows Printing (the print spooler, once more);
  • ODBC (the least of our worries this month).
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We’re seeing some experiences of issues this month with Kerberos. In response, Microsoft has offered two Data Base articles on learn how to deal with the November modifications:

Given the character of those reported zero-days, and accounting for the comparatively slim change profile this month, we suggest quick patching for all Home windows programs. Add these Home windows updates to your “Patch Now” schedule — and this time we actually imply it.

Microsoft Workplace

Microsoft launched eight updates to the Workplace platform, affecting Phrase, Excel and SharePoint server. There have been no essential updates this month (no preview pane vulnerabilities), with every patch rated vital by Microsoft. As well as, Microsoft launched a “Protection in Depth” advisory (ADV220003) for Workplace. These Microsoft advisories cowl the next enhanced safety options:

These options are price additional examination; you may learn extra about these and different preventative safety measures right here. Add these low-impact Microsoft Workplace updates to your commonplace launch schedule.

Microsoft Trade Server

Sadly, now we have Microsoft Trade Server updates again on the roster this month. Microsoft launched 4 updates; one (CVE-2022-41080) was rated as essential and the opposite three as vital. The essential elevation of privilege vulnerability in Trade has a ranking of CVSS 8.8 and although we do not see reported exploits, it is a critical low-complexity community accessible challenge. Trade directors have to patch their servers this weekend. Add this to your “Patch Now” launch schedule.

Microsoft improvement platforms

Microsoft launched 4 updates, all rated vital, to its Visible Studio platform. Each the Visible Studio and Sysmon instruments are low profile, non-urgent updates to discrete Microsoft developer instruments. Add these to your common developer patch schedule.

Adobe (actually, simply Reader)

No updates from Adobe for November. Given the variety of patches launched final month, that is no shock. We may even see one other massive replace from Adobe in December, given its regular replace/launch cadence.

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