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AUSCERT Security Bulletin
ASB-2021.0190
Microsoft Patch Tuesday update for Windows for October 2021
13 October 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: Windows 10
Windows 11
Windows 8.1
Windows Server 2012
Windows Server 2012 R2
Windows Server 2016
Windows Server 2019
Windows Server 2022
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Increased Privileges -- Existing Account
Denial of Service -- Remote/Unauthenticated
Provide Misleading Information -- Remote with User Interaction
Unauthorised Access -- Remote/Unauthenticated
Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-41361 CVE-2021-41357 CVE-2021-41347
CVE-2021-41346 CVE-2021-41345 CVE-2021-41343
CVE-2021-41342 CVE-2021-41340 CVE-2021-41339
CVE-2021-41338 CVE-2021-41337 CVE-2021-41336
CVE-2021-41335 CVE-2021-41334 CVE-2021-41332
CVE-2021-41331 CVE-2021-41330 CVE-2021-40489
CVE-2021-40488 CVE-2021-40478 CVE-2021-40477
CVE-2021-40476 CVE-2021-40475 CVE-2021-40470
CVE-2021-40469 CVE-2021-40468 CVE-2021-40467
CVE-2021-40466 CVE-2021-40465 CVE-2021-40464
CVE-2021-40463 CVE-2021-40462 CVE-2021-40461
CVE-2021-40460 CVE-2021-40456 CVE-2021-40455
CVE-2021-40454 CVE-2021-40450 CVE-2021-40449
CVE-2021-40443 CVE-2021-38672 CVE-2021-38663
CVE-2021-38662 CVE-2021-36970 CVE-2021-36953
CVE-2021-26442 CVE-2021-26441
Comment: Microsoft notes that CVE-2021-40449 is being actively exploited
OVERVIEW
Microsoft has released its monthly security patch update for the
month of October 2021.
This update resolves 47 vulnerabilities across the following
products: [1]
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-2021-26441 Elevation of Privilege Important
CVE-2021-26442 Elevation of Privilege Important
CVE-2021-36953 Denial of Service Important
CVE-2021-36970 Spoofing Important
CVE-2021-38662 Information Disclosure Important
CVE-2021-38663 Information Disclosure Important
CVE-2021-38672 Remote Code Execution Critical
CVE-2021-40443 Elevation of Privilege Important
CVE-2021-40449 Elevation of Privilege Important
CVE-2021-40450 Elevation of Privilege Important
CVE-2021-40454 Information Disclosure Important
CVE-2021-40455 Spoofing Important
CVE-2021-40456 Security Feature Bypass Important
CVE-2021-40460 Security Feature Bypass Important
CVE-2021-40461 Remote Code Execution Critical
CVE-2021-40462 Remote Code Execution Important
CVE-2021-40463 Denial of Service Important
CVE-2021-40464 Elevation of Privilege Important
CVE-2021-40465 Remote Code Execution Important
CVE-2021-40466 Elevation of Privilege Important
CVE-2021-40467 Elevation of Privilege Important
CVE-2021-40468 Information Disclosure Important
CVE-2021-40469 Remote Code Execution Important
CVE-2021-40470 Elevation of Privilege Important
CVE-2021-40475 Information Disclosure Important
CVE-2021-40476 Elevation of Privilege Important
CVE-2021-40477 Elevation of Privilege Important
CVE-2021-40478 Elevation of Privilege Important
CVE-2021-40488 Elevation of Privilege Important
CVE-2021-40489 Elevation of Privilege Important
CVE-2021-41330 Remote Code Execution Important
CVE-2021-41331 Remote Code Execution Important
CVE-2021-41332 Information Disclosure Important
CVE-2021-41334 Elevation of Privilege Important
CVE-2021-41335 Elevation of Privilege Important
CVE-2021-41336 Information Disclosure Important
CVE-2021-41337 Security Feature Bypass Important
CVE-2021-41338 Security Feature Bypass Important
CVE-2021-41339 Elevation of Privilege Important
CVE-2021-41340 Remote Code Execution Important
CVE-2021-41342 Remote Code Execution Important
CVE-2021-41343 Information Disclosure Important
CVE-2021-41345 Elevation of Privilege Important
CVE-2021-41346 Security Feature Bypass Important
CVE-2021-41347 Elevation of Privilege Important
CVE-2021-41357 Elevation of Privilege Important
CVE-2021-41361 Spoofing Important
MITIGATION
Microsoft recommends updating the software with the version made
available on the Microsoft Update Catalogue for the following
Knowledge Base articles. [1].
KB5006667, KB5006669, KB5006670, KB5006671, KB5006672
KB5006674, KB5006675, KB5006699, KB5006714, KB5006729
KB5006732, KB5006739
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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