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                         AUSCERT Security Bulletin

                               ASB-2021.0047
           Microsoft Patch Tuesday update for Microsoft Office,
         Microsoft Office Services and Web Apps for February 2021
                             10 February 2021

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

Product:          Microsoft 365 Apps for Enterprise
                  Microsoft Excel
                  Microsoft Lync Server
                  Microsoft Office
                  Microsoft Office Web Apps Server
                  Microsoft Sharepoint
                  Microsoft Teams
                  Office Online Server
                  Skype for Business
Operating System: Windows
                  Mac OS
                  Apple iOS
Impact/Access:    Execute Arbitrary Code/Commands -- Existing Account
                  Denial of Service               -- Existing Account
                  Access Confidential Data        -- Existing Account
                  Provide Misleading Information  -- Existing Account
Resolution:       Patch/Upgrade
CVE Names:        CVE-2021-24114 CVE-2021-24099 CVE-2021-24073
                  CVE-2021-24072 CVE-2021-24071 CVE-2021-24070
                  CVE-2021-24069 CVE-2021-24068 CVE-2021-24067
                  CVE-2021-24066 CVE-2021-1726 

OVERVIEW

        Microsoft has released its monthly security patch update for the month of February 2021.
        
        This update resolves 11 vulnerabilities across the following products: [1]
        
         Microsoft 365 Apps for Enterprise for 32-bit Systems
         Microsoft 365 Apps for Enterprise for 64-bit Systems
         Microsoft Excel 2010 Service Pack 2 (32-bit editions)
         Microsoft Excel 2010 Service Pack 2 (64-bit editions)
         Microsoft Excel 2013 RT Service Pack 1
         Microsoft Excel 2013 Service Pack 1 (32-bit editions)
         Microsoft Excel 2013 Service Pack 1 (64-bit editions)
         Microsoft Excel 2016 (32-bit edition)
         Microsoft Excel 2016 (64-bit edition)
         Microsoft Lync Server 2013
         Microsoft Office 2019 for 32-bit editions
         Microsoft Office 2019 for 64-bit editions
         Microsoft Office 2019 for Mac
         Microsoft Office Online Server
         Microsoft Office Web Apps Server 2013 Service Pack 1
         Microsoft SharePoint Enterprise Server 2016
         Microsoft SharePoint Foundation 2010 Service Pack 2
         Microsoft SharePoint Foundation 2013 Service Pack 1
         Microsoft SharePoint Server 2019
         Microsoft Teams for iOS
         Office Online Server
         Skype for Business Server 2015 CU 8
         Skype for Business Server 2019  CU2


IMPACT

        Microsoft has given the following details regarding these vulnerabilities.
        
         Details         Impact                   Severity
         CVE-2021-1726   Spoofing                 Important
         CVE-2021-24066  Remote Code Execution    Important
         CVE-2021-24067  Remote Code Execution    Important
         CVE-2021-24068  Remote Code Execution    Important
         CVE-2021-24069  Remote Code Execution    Important
         CVE-2021-24070  Remote Code Execution    Important
         CVE-2021-24071  Information Disclosure   Important
         CVE-2021-24072  Remote Code Execution    Important
         CVE-2021-24073  Spoofing                 Important
         CVE-2021-24099  Denial of Service        Important
         CVE-2021-24114  Information Disclosure   Important


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.

===========================================================================
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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