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                         AUSCERT Security Bulletin

                               ASB-2020.0098
      Microsoft Patch Tuesday update for Developer Tools for May 2020
                                13 May 2020

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:              Developer Tools
Operating System:     Windows
Impact/Access:        Execute Arbitrary Code/Commands -- Remote with User Interaction
                      Increased Privileges            -- Existing Account            
                      Denial of Service               -- Remote/Unauthenticated      
Resolution:           Patch/Upgrade
CVE Names:            CVE-2020-1192 CVE-2020-1171 CVE-2020-1161
                      CVE-2020-1108 CVE-2020-1066 
Member content until: Friday, June 12 2020
Reference:            ESB-2020.1012

OVERVIEW

        Microsoft has released its monthly security patch update for the month of May 2020.
        
        This update resolves 5 vulnerabilities across the following products: [1]
        
         .NET Core 2.1
         .NET Core 3.1
         .NET Core 5.0
         ASP.NET Core 3.1
         Microsoft .NET Framework 2.0 Service Pack 2
         Microsoft .NET Framework 3.0 Service Pack 2
         Microsoft .NET Framework 3.5
         Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2
         Microsoft .NET Framework 3.5 AND 4.6/4.6.1/4.6.2
         Microsoft .NET Framework 3.5 AND 4.7.1/4.7.2
         Microsoft .NET Framework 3.5 AND 4.7.2
         Microsoft .NET Framework 3.5 AND 4.8
         Microsoft .NET Framework 3.5.1
         Microsoft .NET Framework 4.5.2
         Microsoft .NET Framework 4.6
         Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2
         Microsoft .NET Framework 4.8
         Microsoft Visual Studio 2017 version 15.9 (includes 15.1 - 15.8)
         Microsoft Visual Studio 2019 version 16.0
         Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)
         Microsoft Visual Studio 2019 version 16.5
         Visual Studio Code


IMPACT

        Microsoft has given the following details regarding these vulnerabilities.
        
         Details         Impact                   Severity
         CVE-2020-1066   Elevation of Privilege   Important
         CVE-2020-1108   Denial of Service        Important
         CVE-2020-1161   Denial of Service        Important
         CVE-2020-1171   Remote Code Execution    Important
         CVE-2020-1192   Remote Code Execution    Critical


MITIGATION

        Microsoft recommends updating the software with the version made available on the Microsoft Update Catalogue for the following Knowledge Base articles. [1]
        
         KB4556807, KB4556826, KB4552931, KB4556402, KB4556441
         KB4556406, KB4556813, KB4552929, KB4556404, KB4556405
         KB4556399, KB4556401, KB4552926, KB4556403, KB4556812
         KB4552928, KB4556400


REFERENCES

        [1] Security Update Guide
            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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