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AUSCERT Security Bulletin
ASB-2021.0232
Microsoft Patch Tuesday update for Microsoft Windows for November 2021
10 November 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: Microsoft Windows
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Increased Privileges -- Existing Account
Denial of Service -- Remote/Unauthenticated
Access Confidential Data -- Remote with User Interaction
Unauthorised Access -- Console/Physical
Resolution: Patch/Upgrade
CVE Names: CVE-2021-42291 CVE-2021-42288 CVE-2021-42287
CVE-2021-42286 CVE-2021-42285 CVE-2021-42284
CVE-2021-42283 CVE-2021-42282 CVE-2021-42280
CVE-2021-42279 CVE-2021-42278 CVE-2021-42277
CVE-2021-42276 CVE-2021-42275 CVE-2021-42274
CVE-2021-41379 CVE-2021-41378 CVE-2021-41377
CVE-2021-41371 CVE-2021-41370 CVE-2021-41367
CVE-2021-41366 CVE-2021-41356 CVE-2021-38666
CVE-2021-38665 CVE-2021-38631 CVE-2021-36957
CVE-2021-26443
OVERVIEW
Microsoft has released its monthly security patch update for the
month of November 2021.
This update resolves 28 vulnerabilities across the following
products: [1]
Remote Desktop client
Windows 10
Windows 11
Windows 8.1
Windows RT 8.1
Windows Server
Windows Server 2012
Windows Server 2012 R2
Windows Server 2016
Windows Server 2019
Windows Server 2022
IMPACT
Microsoft has given the following details regarding these vulnerabilities.
Details Impact Severity
CVE-2021-26443 Remote Code Execution Critical
CVE-2021-36957 Elevation of Privilege Important
CVE-2021-38631 Information Disclosure Important
CVE-2021-38665 Information Disclosure Important
CVE-2021-38666 Remote Code Execution Critical
CVE-2021-41356 Denial of Service Important
CVE-2021-41366 Elevation of Privilege Important
CVE-2021-41367 Elevation of Privilege Important
CVE-2021-41370 Elevation of Privilege Important
CVE-2021-41371 Information Disclosure Important
CVE-2021-41377 Elevation of Privilege Important
CVE-2021-41378 Remote Code Execution Important
CVE-2021-41379 Elevation of Privilege Important
CVE-2021-42274 Denial of Service Important
CVE-2021-42275 Remote Code Execution Important
CVE-2021-42276 Remote Code Execution Important
CVE-2021-42277 Elevation of Privilege Important
CVE-2021-42278 Elevation of Privilege Important
CVE-2021-42279 Remote Code Execution Critical
CVE-2021-42280 Elevation of Privilege Important
CVE-2021-42282 Elevation of Privilege Important
CVE-2021-42283 Elevation of Privilege Important
CVE-2021-42284 Denial of Service Important
CVE-2021-42285 Elevation of Privilege Important
CVE-2021-42286 Elevation of Privilege Important
CVE-2021-42287 Elevation of Privilege Important
CVE-2021-42288 Security Feature Bypass Important
CVE-2021-42291 Elevation of Privilege Important
MITIGATION
Microsoft recommends updating the software with the version made
available on the Microsoft Update Catalogue for the following
Knowledge Base articles. [1].
KB5007186, KB5007189, KB5007192, KB5007205, KB5007206
KB5007207, KB5007215, KB5007245, KB5007247, KB5007255
KB5007260
REFERENCES
[1] Microsoft Security Update Guidance
https://portal.msrc.microsoft.com/en-us/security-guidance
AusCERT has made every effort to ensure that the information contained
in this document is accurate. However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.
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Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
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