February 2021 Patch Tuesday

Copyright © 2021 Ivanti. All rights reserved.
Patch Tuesday Webinar
Wednesday, February 10, 2021
Hosted by: Chris Goettl & Todd Schell
Dial in: 1-877-668-4490 (US)
Event ID: 177 640 1649

Agenda
February 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
▪ Lye-poisoning attack in Florida shows cybersecurity gaps in water systems
▪ https://www.nbcnews.com/tech/security/lye-poisoning-attack-florida-shows-
cybersecurity-gaps-water-systems-n1257173
▪ Malicious Code Injected via Google Chrome Extension Highlights App Risks
▪ https://www.darkreading.com/application-security/malicious-code-injected-via-google-chrome-
extension-highlights-app-risks/d/d-id/1340100

Known Exploited Vulnerability
▪ CVE-2021-1732 Windows Win32k Elevation of Privilege Vulnerability
▪ https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-1732
Source: Microsoft
▪ Affected Products: Windows 10, Server 2016 and
newer OS version
▪ Importance of Risk-based Prioritization: Microsoft
Severity Important, CVSS Score 7.8

Netlogon Secure Channel Connections
▪ Phase 2 update: Netlogon CVE-2020-1472
▪ Deployment Guidelines
▪ Deploy August 11th updates
▪ Monitor for warning events
▪ Act on warning events
▪ Netlogon exploited in late September
▪ Emergency Directive 20-04 released on Sept 18, 2020
▪ All Federal Agencies required to update and enable by Sept 21,
2020
▪ Full enforcement mode goes into effect with February 9, 2021 OS
update

Known Exploited Vulnerability
▪ CVE-2021-21017 Adobe Acrobat and Reader Arbitrary Code Execution
Source: Microsoft
▪ Affected Products: Acrobat DC, Acrobat Reader
DC, Acrobat 2020, Acrobat Reader 2020, Acrobat
2017, Acrobat Reader 2017
▪ Adobe has received a report that CVE-2021-21017
has been exploited in the wild in limited attacks
targeting Adobe Reader users on Windows.
▪ https://threatpost.com/exploited-windows-kernel-
bug-takeover/163800/

Publicly Disclosed Vulnerabilities
▪ CVE-2021-1721 .NET Core and Visual Studio Denial of Service Vulnerability
▪ CVE-2021-1727 Windows Installer Elevation of Privilege Vulnerability
▪ CVE-2021-1733 Sysinternals PsExec Elevation of Privilege Vulnerability
▪ CVE-2021-24098 Windows Console Driver Denial of Service Vulnerability
▪ CVE-2021-24106 Windows DirectX Information Disclosure Vulnerability
▪ CVE-2021-26701 .NET Core Remote Code Execution Vulnerability
Source: Microsoft

Microsoft Patch Tuesday Updates of Interest
▪ Advisory 990001 Latest Servicing Stack Updates (SSU)
▪ https://msrc.microsoft.com/update-guide/en-US/vulnerability/ADV990001
▪ Updated SSUs this month
▪ Windows 10
▪ Windows 10 1607/Server 2016
▪ Windows 10 1809/Server 2019
▪ Windows 10 1909/Windows Server 1909
▪ Development Tool and Other Updates
▪ .NET Core 2.1, 3.1 and 5.0
▪ Azure Kubernetes Service
▪ Package Manager Configurations
▪ PsExec
▪ Visual Studio 2017-2019
▪ Visual Studio Code 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

APSB21-09: Security Update for Adobe Acrobat and Reader
▪ Maximum Severity: Critical
▪ Affected Products: Adobe Acrobat and Reader (all current versions)
▪ Description: Adobe has released security updates for Adobe Acrobat and Reader for
Windows and macOS. These updates address multiple critical and important
vulnerabilities. Successful exploitation could lead to arbitrary code execution in the
context of the current user.
▪ Impact: Remote Code Execution, Denial of Service, Elevation of Privilege and
Information Disclosure
▪ Fixes 23 Vulnerabilities: CVE-2021-21017 has been exploited in the wild in limited
attacks targeting Adobe Reader users on Windows
▪ https://helpx.adobe.com/security/products/acrobat/apsb21-09.html
▪ Restart Required: Requires application restart

MS21-02-W10: Windows 10 Update
▪ 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 6 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 28 Vulnerabilities: CVE-2021-1727, CVE-2021-24098, and CVE-2021-
24106 are publicly disclosed. CVE-2021-1732 is known exploited. See the Security
Update Guide for the complete list of CVEs.
▪ Restart Required: Requires restart
▪ Known Issues: See next slides

February Known Issues for Windows 10
▪ KB 4601318 – 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 4601345 – 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.

February Known Issues for Windows 10 (cont)
▪ KB 4601315 – 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.
▪ NOTE: Incompatibility found with Discord app. Update Discord to latest version.

February Known Issues for Windows 10 (cont)
▪ KB 4601319 – 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]
▪ NOTE: Incompatibility found with Discord app. Update Discord to latest version.

MS21-02-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 4598288 (released January 12, 2021). Bulletin is based on KB 4601360.
Security updates to Windows App Platform and Frameworks, Windows Core
Networking, and Windows Hybrid Cloud Networking.
▪ Fixes 12 Vulnerabilities: CVE-2021-1727 is publicly disclosed. No CVEs are
known exploited. See the Security Update Guide for the complete list of CVEs.
▪ Known Issues: [File Rename] See next slide.

February Known Issues for Server 2008
▪ KB 4601360 – 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 4601366 – Windows Server 2008 (Security-only Update)
▪ [File Rename]

MS21-02-SO2K8-ESU: Security-only Update for Windows Server 2008
▪ Affected Products: Microsoft Windows Server 2008
▪ Description: Bulletin is based on KB 4601366. Security updates to Windows App
Platform and Frameworks, Windows Core Networking, and Windows Hybrid Cloud
Networking.
▪ Known Issues: [File Rename] See previous slide.

MS21-02-MR7-ESU: Monthly Rollup for Win 7
MS21-02-MR2K8R2-ESU Monthly Rollup for Server 2008 R2
▪ Affected Products: Microsoft Windows 7, Server 2008 R2, and IE
Security updates to Windows App Platform and Frameworks, Windows Hybrid Cloud
Networking, and Windows Core Networking.
▪ Known Issues: [File Rename]

MS21-02-SO7-ESU: Security-only Update for Win 7
MS21-02-SO2K8R2-ESU: Security-only Update for Server 2008 R2
▪ Affected Products: Microsoft Windows 7 and Server 2008 R2
Platform and Frameworks, Windows Hybrid Cloud Networking, and Windows Core
Networking.

MS21-02-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 4598278 (released previous January 12, 2021). Bulletin is based on KB
4601348. Security updates to Windows App Platform and Frameworks, Windows Core
Networking, Windows Hybrid Cloud Networking, and Windows Peripherals.
▪ Fixes 16 Vulnerabilities: CVE-2021-1727 is publicly disclosed. No CVEs are known
exploited. See the Security Update Guide for the complete list of CVEs.

MS21-02-SO8: Security-only Update for Windows Server 2012
▪ Affected Products: Microsoft Windows Server 2012
Platform and Frameworks, Windows Core Networking, Windows Hybrid Cloud
Networking, and Windows Peripherals.

MS21-02-MR81: Monthly Rollup for Win 8.1 and Server 2012 R2
▪ Affected Products: Microsoft Windows 8.1, Server 2012 R2, and IE
Security updates to Windows App Platform and Frameworks, Windows Hybrid Cloud
Networking, and Windows Core Networking.

MS21-02-SO81: Security-only Update for Win 8.1 and Server 2012 R2
▪ Affected Products: Microsoft Windows 8.1, Server 2012 R2
Platform and Frameworks, Windows Hybrid Cloud Networking, and Windows Core
Networking.

MS21-02-OFF: Security Updates for Microsoft Office
▪ Maximum Severity: Important
▪ Affected Products: Excel 2010-2016, Office Online Server, Office 2019 for macOS,
and Office Web Apps Server
▪ Description: This security update resolves multiple vulnerabilities in Microsoft Office
applications. Consult the Security Update Guide for specific details on each. This
bulletin references 5 KB articles plus release notes for the MacOS Office.
▪ Impact: Remote Code Execution
▪ Fixes 4 Vulnerabilities: No vulnerabilities are publicly disclosed or known
exploited. CVE-2021-24067, CVE-2021-24068, CVE-2021-24069 and CVE-2021-
24070 are fixed in this release.
▪ Known Issues: None reported

MS21-02-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
▪ Fixes 3 Vulnerabilities: No CVEs are publicly disclosed or known exploited. CVE-
2021-24067, CVE-2021-24069 and CVE-2021-24070 are fixed in this release.
▪ Known Issues: None reported

MS21-02-SPT: Security Updates for SharePoint Server
▪ Affected Products: Microsoft SharePoint Enterprise Server 2016, Microsoft
SharePoint Foundation Server 2010 and 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 4 KB articles.
▪ Impact: Remote Code Execution, Spoofing and Information Disclosure
▪ Fixes 4 Vulnerabilities: No CVEs are publicly disclosed or known exploited. CVE-
2021-1726, CVE-2021-24066, CVE-2021-24071 and CVE-2021-24072 are fixed in this
release.
▪ Known Issues: If your customized SharePoint pages use
the SPWorkflowDataSource or FabricWorkflowInstanceProvider user control, some
functions on those pages may not work. To resolve this issue, see KB 5000640.

MS21-02-MRNET: Monthly Rollup for Microsoft .Net
▪ Affected Products: Microsoft Windows .Net Framework 4.6 through 4.8
▪ Description: This security update addresses a denial of service vulnerability in .NET
Framework. This bulletin references 11 KB articles.
▪ Impact: Denial of Service
▪ Fixes 1 Vulnerability: CVE-2021-24111 is not publicly disclosed or known
exploited.
▪ Restart Required: Does not require a system restart after you apply it unless files
that are being updated are locked or are being used.
▪ Known Issues: See next slide

February Known Issues for .NET Framework
Source: Microsoft

MS21-02-SONET: Security-only Update for Microsoft .Net
▪ Affected Products: Microsoft Windows .Net Framework 4.6 through 4.8
▪ Description: This security update addresses a denial of service vulnerability in .NET
Framework. This bulletin references 4 KB articles.
▪ Impact: Denial of Service
▪ Fixes 1 Vulnerability: CVE-2021-24111 is not publicly disclosed or known
exploited.
▪ Restart Required: Does not require a system restart after you apply it unless files
that are being updated are locked or are being used.
▪ Known Issues: See previous slide

MS21-02-EXCH: Security Updates for Exchange Server
▪ Affected Products: Microsoft Exchange Server 2016 and 2019
▪ Description: This security update fixes vulnerabilities in Microsoft
Exchange. This bulletin is based on KBs 4571787, 4571788, and
4602269.
▪ Impact: Spoofing
▪ Fixes 2 Vulnerabilities: CVE-2021-1730 and CVE-2021-24085
are not publicly disclosed or known exploited.
▪ Known Issues: Multiple issues and workarounds per each
respective KB

Between Patch Tuesdays

Release Summary
▪ Security Updates: Firefox (1), Firefox ESR (1), Google Chrome (3), Java 8 (1), Java
Development Kit 8 (1), SeaMonkey (1), Thunderbird (1), Wireshark (1)
▪ Non-Security Updates: AIMP (1), AdoptOpenJDK JDK 11 (1), AdoptOpenJDK JDK 8 (1),
AdoptOpenJDK JRE 11 (1), AdoptOpenJDK JRE 8 (1), Azul Zulu JDK 11 (1), Azul Zulu JDK 8
(1), Azul Zulu JRE 11 (1), Azul Zulu JRE 8Box Edit (1), BlueJeans Outlook Addin (1), Box Drive
(1), Ccleaner (1), ClickShare App Machine-Wide Installer (2), Amazon Corretto 11 (1), Amazon
Corretto 8 (1), Cisco WebEx Teams (3), Citrix Workspace App (2), Dropbox (3), Evernote (2),
Firefox (1), Firefox ESR, (1), FileZilla Client (1), Google Drive File Stream (1), Falcon sensor for
Windows (1), Google Backup and Sync (2), Google Chrome (1), GIT for windows (1), GoodSync
(3), Inkscape (1), IrfanView (1), Cisco Jabber (1), Jabra Direct (1), Java Development Kit 11 (1),
LibreOffice (1), Nitro Pro (1), Nitro Pro Enterprise (1), Node.JS (4), NextCloud Desktop Client
(1), Opera Browser (2), Apache OpenOffice (1), VirtualBox (1), PDF-Xchange PRO (3),
Paint.NET (1), Plantronics Hub (1), Plex Media Server (3), RingCentral App (Machine-Wide
Installer) (1), Skype (1), Snagit (1), Splunk Universal Forwarder (1), Sourcetree for Windows
Enterprise (1), Tableau Desktop (4), Tableau Prep Builder (1), Tableau Reader (1), Thunderbird
(1), TortoiseHG (1), Apache Tomcat (3), TeamViewer (2), UltraVNC (1), VLC Media Player (1),
VMWare Tools (1), WinDVD Pro (1), WinSCP (1), Wireshark (1), WinMerge (1), WinZip (1),
XnView (1), Zoom Client (3), Zoom Outlook Plugin (1)

Third Party CVE Information
▪ Firefox 85.0
▪ FF-210126, QFF850
▪ Fixes 13 Vulnerabilities: CVE-2021-23953, CVE-2021-23954, CVE-2021-23955,
CVE-2021-23956, CVE-2021-23957, CVE-2021-23958, CVE-2021-23959, CVE-
2021-23960, CVE-2021-23961, CVE-2021-23962, CVE-2021-23963, CVE-2021-
23964, CVE-2021-23965
▪ Firefox ESR 78.7.0
▪ FFE-210126, QFFE7870
CVE-2021-23960, CVE-2021-23964

Third Party CVE Information (cont)
▪ Google Chrome 88.0.4324.96
▪ CHROME-210118, QGC880432496
2021-21110, CVE-2021-21111, CVE-2021-21112, CVE-2021-21113, CVE-2021-
21114, CVE-2021-21115, CVE-2021-21116, CVE-2021-21117, CVE-2021-21118,
2021-21123, CVE-2021-21124, CVE-2021-21125, CVE-2021-21126, CVE-2021-
21127, CVE-2021-21128, CVE-2021-21129, CVE-2021-21130, CVE-2021-21131,
2021-21136, CVE-2021-21137, CVE-2021-21138, CVE-2021-21139, CVE-2021-
21140, CVE-2021-21141

▪ CHROME-210202, QGC8804324146
2021-21123, CVE-2021-21124, CVE-2021-21125, CVE-2021-21126, CVE-2021-
21127, CVE-2021-21128, CVE-2021-21129, CVE-2021-21130, CVE-2021-21131,
2021-21136, CVE-2021-21137, CVE-2021-21138, CVE-2021-21139, CVE-2021-
21140, CVE-2021-21141
▪ CHROME-210204, QGC8804324150
▪ Fixes 1 Vulnerability: CVE-2021-21148

▪ Java 8 Update 281
▪ JAVA8-281, QJAVA8U281
▪ Java Development Kit 8 Update 281
▪ JDK8-281, QJDK8U281
▪ Wireshark 3.4.3
▪ WIRES34-210201, QWIRES343
▪ Fixes 2 Vulnerabilities: CVE-2021-22173, CVE-2021-22174
▪ Thunderbird 78.7.0
▪ TB-210127, QTB7870
CVE-2021-23954, CVE-2021-23960, CVE-2021-23964

▪ SeaMonkey 2.53.6
▪ SM20-210122, QSM2536
▪ Fixes 14 Vulnerabilities: CVE-2018-12359, CVE-2018-12360, CVE-2018-12361, CVE-
2018-12362, CVE-2018-12363, CVE-2018-12364, CVE-2018-12365, CVE-2018-12366,
CVE-2018-12367, CVE-2018-12368, CVE-2018-12371, CVE-2018-5156, CVE-2018-5187,
CVE-2018-5188

Q & A

February 2021 Patch Tuesday

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