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AUSCERT Security Bulletin
ASB-2021.0193
Microsoft Patch Tuesday update for Microsoft Extended
Security Update (ESU) products for October 2021
13 October 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: Windows 7
Windows Server 2008
Windows Server 2008 R2
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
Access Confidential Data -- Existing Account
Unauthorised Access -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-41343 CVE-2021-41342 CVE-2021-41340
CVE-2021-41335 CVE-2021-41332 CVE-2021-41331
CVE-2021-40489 CVE-2021-40469 CVE-2021-40467
CVE-2021-40466 CVE-2021-40465 CVE-2021-40460
CVE-2021-40455 CVE-2021-40449 CVE-2021-40443
CVE-2021-38663 CVE-2021-38662 CVE-2021-36970
CVE-2021-36953 CVE-2021-26442
Reference: ASB-2021.0190
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 20 vulnerabilities across the following
products: [1]
Windows 7 for 32-bit Systems Service Pack 1
Windows 7 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
Windows Server 2008 for 32-bit Systems Service Pack 2
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
Windows Server 2008 for x64-based Systems Service Pack 2
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
IMPACT
Microsoft has given the following details regarding these vulnerabilities.
Details Impact Severity
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-2021-40443 Elevation of Privilege Important
CVE-2021-40449 Elevation of Privilege Important
CVE-2021-40455 Spoofing Important
CVE-2021-40460 Security Feature Bypass Important
CVE-2021-40465 Remote Code Execution Important
CVE-2021-40466 Elevation of Privilege Important
CVE-2021-40467 Elevation of Privilege Important
CVE-2021-40469 Remote Code Execution Important
CVE-2021-40489 Elevation of Privilege Important
CVE-2021-41331 Remote Code Execution Important
CVE-2021-41332 Information Disclosure Important
CVE-2021-41335 Elevation of Privilege Important
CVE-2021-41340 Remote Code Execution Important
CVE-2021-41342 Remote Code Execution Important
CVE-2021-41343 Information Disclosure Important
MITIGATION
Microsoft recommends updating the software with the version made
available on the Microsoft Update Catalogue for the following
Knowledge Base articles. [1].
KB5006671, KB5006715, KB5006728, KB5006736, KB5006743
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.
===========================================================================
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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