March 2021 Patch Tuesday

Copyright © 2021 Ivanti. All rights reserved.
Patch Tuesday Webinar
Wednesday, March 10, 2021
Hosted by: Chris Goettl & Todd Schell

Agenda
March 2021 Patch Tuesday Overview
In the News
Bulletins and Releases
Between Patch Tuesdays
Q & A
1
2
3
4
5

Overview

In the News

In the News
Source: Microsoft
 Microsoft Edge Legacy will prompt you to install Chromium Edge
 https://www.bleepingcomputer.com/news/microsoft/microsoft-edge-legacy-will-
now-prompt-you-to-install-chromium-edge/
 A Basic Timeline of the Exchange Mass-Hack
 https://krebsonsecurity.com/2021/03/a-basic-timeline-of-the-exchange-mass-
hack/
 Microsoft rushes out a patch for older versions of Exchange
 https://www.zdnet.com/article/microsoft-exchange-attacks-now-microsoft-rushes-out-a-
patch-for-these-unsupported-exchange-servers-too/
 CISA Emergency Directive 21-02
 https://cyber.dhs.gov/ed/21-02/
 CISA Guidance for Remediating Microsoft Exchange Vulnerabilities
 https://us-cert.cisa.gov/remediating-microsoft-exchange-vulnerabilities

Exchange Servers Under Attack!
 Microsoft Threat Intelligence Center announcement on March 2
 https://www.microsoft.com/security/blog/2021/03/02/hafnium-targeting-exchange-
servers/
 Hacker group HAFNIUM exploiting 4 vulnerabilities
 CVE-2021-26855
 CVE-2021-26857
 CVE-2021-26858
 CVE-2021-27065
 Exchange updates for Exchange Server 2013 (CU23), Exchange Server 2016
(CU18 or CU19), and Exchange Server 2019 (CU7 or CU8)
 Another round of updates on Monday, March 8
 Cumulative Updates for servers that are out of support, including Exchange Server
2019 CU 6, CU 5, and CU 4 and Exchange Server 2016 CU 16, CU 15, and CU14.

Publicly Disclosed Vulnerabilities
 CVE-2021-27077 Windows Win32k Elevation of Privilege Vulnerability
 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27077
 CVE-2021-26701 .NET Core Remote Code Execution Vulnerability
Source: Microsoft

Known Exploited and Disclosed Vulnerability
 CVE-2021-26411 Internet Explorer Memory Corruption Vulnerability
Source: Microsoft
Affected Products: Internet Explorer 9 and 11,
Microsoft Edge (EdgeHTML-based)
Severity: Critical
Base CVSS 3.0 Score: 8.8

Microsoft Patch Tuesday Updates of Interest
 Combined SSU and LCU for Windows 10 2004 and newer
 https://docs.microsoft.com/en-us/windows/deployment/update/servicing-stack-updates
 Advisory 990001 Latest Servicing Stack Updates (SSU)
 https://msrc.microsoft.com/update-guide/en-US/vulnerability/ADV990001
 Updated SSUs this month
 Windows 10 1809/Server 2019
 Windows 10 1909/Windows Server 1909
 Windows 10 2004/Windows Server 2004
 Windows 10 20H2/Windows Server 20H2
 Development Tool and Other Updates
 Azure Kubernetes Service
 Azure (multiple components)
 Visual Studio 2017-2019
 Visual Studio Code (multiple components) Source: Microsoft

Windows 10 Lifecycle Awareness
Windows 10 Enterprise and Education
Version Release Date End of Support Date
20H2 10/20/2020 5/9/2023
2004 5/27/2020 12/14/2021
1909 11/12/2019 5/10/2022
1903 5/21/2019 12/8/2020
1809 11/13/2018 5/11/2021
1803 4/30/2018 5/11/2021
1709 10/17/2017 10/13/2020
Windows Datacenter and Standard Server
Version Release Date End of Support Date
20H2 10/20/2020 5/10/2022
2004 5/27/2020 12/14/2021
1909 11/12/2019 5/11/2021
1903 5/21/2019 12/8/2020
 Lifecycle Fact Sheet
 https://docs.microsoft.com/en-us/lifecycle/faq/windows
 https://docs.microsoft.com/en-us/lifecycle/products/windows-server
 https://docs.microsoft.com/en-us/lifecycle/products/windows-10-enterprise-
and-education

Patch Content Announcements
 Announcements Posted on Community Forum Pages
 https://forums.ivanti.com/s/group/CollaborationGroup/00Ba0000009oKICEA2
 Subscribe to receive email for the desired product(s)

Bulletins and Releases

MS21-03-W10: Windows 10 Update
 Maximum Severity: Critical
 Affected Products: Microsoft Windows 10 Versions 1607, 1709, 1803, 1809, 1903,
1909, 2004, 20H2, Server 2016, Server 2019, Server version 1909, Server version
2004, Server version 20H2, IE 11, Legacy Edge and Edge Chromium
 Description: This bulletin references 10 KB articles. See KBs for the list of changes.
 Impact: Remote Code Execution, Security Feature Bypass, Denial of Service,
Elevation of Privilege and Information Disclosure
 Fixes 50 Vulnerabilities: CVE-2021-27077 is publicly disclosed. CVE-2021-26411
is publicly disclosed and known exploited. See the Security Update Guide for the
complete list of CVEs.
 Restart Required: Requires restart
 Known Issues: See next slides

March Known Issues for Windows 10
 KB 5000803 – Windows 10, Version 1607 and Server 2016
 [Min Password] After installing KB4467684, the cluster service may fail to start with
the error “2245 (NERR_PasswordTooShort)” if the group policy “Minimum
Password Length” is configured with greater than 14 characters. Workaround:
Set the domain default "Minimum Password Length" policy to less than or equal to
14 characters. Microsoft is working on a resolution.
 KB 5000822 – Windows 10, Version 1809, Server 2019 All Versions
 [Asian Packs] After installing KB 4493509, devices with some Asian language
packs installed may receive the error, "0x800f0982 -
PSFX_E_MATCHING_COMPONENT_NOT_FOUND.“ Workaround: Uninstall
and reinstall any recently added language packs or select Check for Updates and
install the April 2019 Cumulative Update. See KB for more recovery details.
Microsoft is working on a resolution.

March Known Issues for Windows 10 (cont)
 KB 5000808 – Windows 10 version 1909, Windows Server version 1909
 [Outdated Updates] System and user certificates might be lost when updating a
device from Windows 10, version 1809 or later to a later version of Windows 10.
This primarily happens when managed devices are updated using outdated
bundles or media through an update management tool such as Windows Server
Update Services (WSUS) or Microsoft Endpoint Configuration Manager.
Note: Devices using Windows Update for Business or that connect directly to
Windows Update are not impacted.
Workaround: If you have already encountered this issue on your device, you can
mitigate it within the uninstall window by going back to your previous version of
Windows. The uninstall window might be 10 or 30 days depending on the
configuration of your environment and the version you’re updating to. See
directions here.
Microsoft is working on a resolution.

March Known Issues for Windows 10 (cont)
 KB 5000802 – Windows 10 version 2004, Windows Server version
2004, Windows 10 version 20H2, Windows Server version 20H2
 [Editor] When using the Microsoft Japanese Input Method Editor (IME) to enter
Kanji characters in an app that automatically allows the input of Furigana
characters, you might not get the correct Furigana characters. You might need to
enter the Furigana characters manually. Workaround: Microsoft is working on a
resolution.
 [Outdated Updates]

MS21-03-IE: Security Updates for Internet Explorer
 Affected Products: Internet Explorer 9 and 11
 Description: The fixes that are included in the cumulative Security Update for
Internet Explorer are also included in the March 2020 Security Monthly Quality Rollup.
Installing either the Security Update for Internet Explorer or the Security Monthly
Quality Rollup installs the fixes that are in the cumulative update. This bulletin
references 11 KB articles.
 Impact: Remote Code Execution
 Fixes 2 Vulnerabilities: CVE-2021-26411 is fixed in both IE 9 and IE 11; it is
publicly disclosed and known exploited. CVE-2021-27085 is also fixed in IE 11.
 Restart Required: Requires browser restart
 Known Issues: None reported

MS21-03-MR2K8-ESU: Monthly Rollup for Windows Server 2008
 Affected Products: Microsoft Windows Server 2008 and IE 9
 Description: This security update includes improvements and fixes that were a part of update
KB 4601360 (released February 9, 2021). Bulletin is based on KB 5000844. Addresses an
elevation of privilege security vulnerability documented in CVE-2021-1640 related to print jobs
submitted to “FILE:” ports. Addresses an issue in which a non-native device that is in the same
realm does not receive a Kerberos Service ticket from Active Directory DCs. Security updates to
Windows Fundamentals, Windows Shell, and Windows Hybrid Cloud Networking.
 Impact: Remote Code Execution, Denial of Service, Elevation of Privilege and Information
Disclosure
 Fixes 22 Vulnerabilities: CVE-2021-27077 is publicly disclosed. CVE-2021-26411 is publicly
disclosed and known exploited. See the Security Update Guide for the complete list of CVEs.
 Known Issues: [File Rename] See next slide.

March Known Issues for Server 2008
 KB 5000844 – Windows Server 2008 (Monthly Rollup)
 [File Rename] Certain operations, such as rename, that you perform on files or folders that
are on a Cluster Shared Volume (CSV) may fail with the error,
“STATUS_BAD_IMPERSONATION_LEVEL (0xC00000A5)”. This occurs when you perform
the operation on a CSV owner node from a process that doesn’t have administrator
privilege. Workaround: Perform the operation from a process that has administrator
privilege or perform the operation from a node that doesn’t have CSV ownership. Microsoft
is working on a resolution.
 KB 5000856 – Windows Server 2008 (Security-only Update)
 [File Rename]

MS21-03-SO2K8-ESU: Security-only Update for Windows Server 2008
 Affected Products: Microsoft Windows Server 2008
 Description: Bulletin is based on KB 5000856. Addresses an issue in which a non-
native device that is in the same realm does not receive a Kerberos Service ticket from
Active Directory DCs. Security updates to Windows Fundamentals, Windows Shell,
and Windows Hybrid Cloud Networking.
 Impact: Remote Code Execution, Denial of Service, Elevation of Privilege and
Information Disclosure
 Fixes 21 Vulnerabilities: CVE-2021-27077 is publicly disclosed. No CVEs are
known exploited. See the Security Update Guide for the complete list of CVEs.
 Known Issues: [File Rename] See previous slide.

MS21-03-MR7-ESU: Monthly Rollup for Win 7
MS21-03-MR2K8R2-ESU Monthly Rollup for Server 2008 R2
 Affected Products: Microsoft Windows 7, Server 2008 R2, and IE
Windows Fundamentals, Windows Shell, Windows UAC, Windows Hybrid Cloud Networking,
and Windows Media.
Disclosure
 Known Issues: [File Rename]

MS21-03-SO7-ESU: Security-only Update for Win 7
MS21-03-SO2K8R2-ESU: Security-only Update for Server 2008 R2
 Affected Products: Microsoft Windows 7 and Server 2008 R2
Windows UAC, Windows Hybrid Cloud Networking, and Windows Media.

MS21-03-MR8: Monthly Rollup for Server 2012
 Affected Products: Microsoft Windows Server 2012 and IE
 Description: This security update includes improvements and fixes that were a part of update KB
4601348 (released previous February 9, 2021). Bulletin is based on KB 5000847. Addresses an
Windows Graphics, and Windows Media.
Disclosure

MS21-03-SO8: Security-only Update for Windows Server 2012
 Affected Products: Microsoft Windows Server 2012
Windows UAC, Windows Hybrid Cloud Networking, Windows Graphics, and Windows
Media.

MS21-03-MR81: Monthly Rollup for Win 8.1 and Server 2012 R2
 Affected Products: Microsoft Windows 8.1, Server 2012 R2, and IE
Windows Media, and Windows Graphics.
Disclosure

MS21-03-SO81: Security-only Update for Win 8.1 and Server 2012 R2
 Affected Products: Microsoft Windows 8.1, Server 2012 R2
Windows UAC, Windows Hybrid Cloud Networking, Windows Media, and Windows
Graphics.

MS21-03-OFF: Security Updates for Microsoft Office
 Maximum Severity: Important
 Affected Products: Excel 2010-2016, Office 2010-2016, Office Online Server,
Office 2019 for macOS, Office Web Apps Server, Powerpoint 2010-2016 and Visio
2010-2016.
 Description: This security update resolves multiple vulnerabilities in Microsoft Office
applications. Consult the Security Update Guide for specific details on each. This
bulletin references 17 KB articles plus release notes for the MacOS Office.
 Impact: Remote Code Execution and Security Feature Bypass
 Fixes 7 Vulnerabilities: No vulnerabilities are publicly disclosed or known
exploited. CVE-2021-24108, CVE-2021-27053, CVE-2021-27054, CVE-2021-27055,
CVE-2021-27056, CVE-2021-27057 and CVE-2021-27058 are fixed in this release.
 Restart Required: Requires application restart

MS21-03-O365: Security Updates Microsoft 365 Apps and Office 2019
 Affected Products: Microsoft 365 Apps, Office 2019
 Description: This month’s update resolved various bugs and performance issues in
Microsoft 365 Apps and Office 2019 applications. Information on Microsoft 365 Apps
security updates is available at https://docs.microsoft.com/en-
us/officeupdates/microsoft365-apps-security-updates.
 Impact: Remote Code Execution and Security Feature Bypass
 Fixes 7 Vulnerabilities: No vulnerabilities are publicly disclosed or known
exploited. CVE-2021-24108, CVE-2021-27053, CVE-2021-27054, CVE-2021-27055,
CVE-2021-27056, CVE-2021-27057 and CVE-2021-27058 are fixed in this release.
 Restart Required: Requires application restart

MS21-03-SPT: Security Updates for SharePoint Server
 Affected Products: Microsoft SharePoint Enterprise Server 2016, Microsoft
SharePoint Foundation Server 2013, and Microsoft SharePoint Server 2019
 Description: This security update resolves vulnerabilities in Microsoft Office that
could allow remote code execution if a user opens a specially crafted Office file. This
bulletin is based on 6 KB articles.
 Impact: Remote Code Execution, Spoofing and Information Disclosure
 Fixes 3 Vulnerabilities: No CVEs are publicly disclosed or known exploited. CVE-
2021-24104, CVE-2021-27052 and CVE-2021-27076 are fixed in this release.

Between Patch Tuesdays

Release Summary
 Security Updates: Google Chrome (2), Firefox (1), Firefox ESR (1), Node.JS (4),
Thunderbird (1)
 Non-Security Updates: Adobe Acrobat (3), Bandicut (1), Box Sync (1), Camtasia
(1), CCleaner (2), Google Chrome (2), Falcon sensor for Windows (2), DropBox (2),
Evernote (2), Google Drive File Stream (1), Jabra Direct (1), BlueJeans (1), LibreOffice
(1), Malwarebytes (1), Nitro Pro (2), Node.JS (5), Notepad++ (1), NextCloud Desktop
Client (1), Opera (5), Plex Media Server (3), PSPad (1), PeaZip (1), R for Windows (1),
RingCentral App (1), Royal TS (2), Skype (1), Slack Machine-Wide Installer (1), Splunk
Universal Forwarder (1), Sourcetree for Windows Enterprise (1), Tableau Desktop (8),
Tableau Reader (1), TortoiseSVN (1), TeamViewer (9), Cisco WebEx Teams (2), Zoom
Client (1)

Third Party CVE Information (cont)
 Google Chrome 88.0.4324.182
 CHROME-210217, QGC8804324182
 Fixes 9 Vulnerabilities: CVE-2021-21149, CVE-2021-21150, CVE-2021-21151,
CVE-2021-21152, CVE-2021-21153, CVE-2021-21154, CVE-2021-21155, CVE-
2021-21156, CVE-2021-21157
 Thunderbird 78.8.0
 TB-210224, QTB7880
CVE-2021-23978

Third Party CVE Information
 Firefox 86.0
 FF-210223, QFF860
2021-23974, CVE-2021-23975, CVE-2021-23976, CVE-2021-23977, CVE-2021-
23978, CVE-2021-23979
 Firefox ESR 78.8.0
 FFE-210223, QFFE7880
CVE-2021-23978

Third Party CVE Information
 Node.JS 15.10.0 (Current)
 NOJSC-210223, QNODEJSC15100
 Fixes 3 Vulnerabilities: CVE-2021-22883, CVE-2021-22884, CVE-2021-23840
 Node.JS 12.21.0 (LTS Lower)
 NOJSLL-210223, QNODEJSLL12210
 Node.JS 14.16.0 (LTS Upper)
 NOJSLU-210223, QNODEJSLU14160
 Node.JS 10.24.0 (Maintain)
 NOJSM-210223, QNODEJSLL10240

Third Party CVE Information (cont)
 Google Chrome 89.0.4389.72
 CHROME-210302, QGC890438972
2021-21164, CVE-2021-21165, CVE-2021-21166, CVE-2021-21167, CVE-2021-
21168, CVE-2021-21169, CVE-2021-21170, CVE-2021-21171, CVE-2021-21172,
2021-21177, CVE-2021-21178, CVE-2021-21179, CVE-2021-21180, CVE-2021-
21181, CVE-2021-21182, CVE-2021-21183, CVE-2021-21184, CVE-2021-21185,
2021-21190

Q & A

March 2021 Patch Tuesday

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