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AUSCERT Security Bulletin
ASB-2021.0045
Microsoft Patch Tuesday update for Developer Tools for February 2021
10 February 2021
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AusCERT Security Bulletin Summary
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Product: .NET
Microsoft .NET Framework
Microsoft Visual Studio
Package Manager Configurations
PsExec
Visual Studio Code
Operating System: SUSE
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Access Privileged Data -- Existing Account
Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-26701 CVE-2021-26700 CVE-2021-24112
CVE-2021-24111 CVE-2021-24105 CVE-2021-1733
CVE-2021-1721 CVE-2021-1639
OVERVIEW
Microsoft has released its monthly security patch update for the
month of February 2021.
This update resolves 8 vulnerabilities across the following products:
[1]
.NET 5.0
.NET Core 2.1
.NET Core 3.1
Microsoft .NET Framework 4.6
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2
Microsoft .NET Framework 4.7.2
Microsoft .NET Framework 4.8
Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)
Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)
Microsoft Visual Studio 2019 version 16.7 (includes 16.0 – 16.6)
Microsoft Visual Studio 2019 version 16.8
Package Manager Configurations
PsExec
Visual Studio Code
Visual Studio Code - npm-script Extension
IMPACT
Microsoft has given the following details regarding these vulnerabilities.
Details Impact Severity
CVE-2021-1639 Remote Code Execution Important
CVE-2021-1721 Denial of Service Important
CVE-2021-1733 Elevation of Privilege Important
CVE-2021-24105 Remote Code Execution Important
CVE-2021-24111 Denial of Service Important
CVE-2021-24112 Remote Code Execution Critical
CVE-2021-26700 Remote Code Execution Important
CVE-2021-26701 Remote Code Execution Critical
MITIGATION
Microsoft recommends updating the software to the latest available version available on the Microsoft Update Catalog. [1].
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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