Microsoft Office Products & Services and Web App Products: Multiple vulnerabilities

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                         ZMCIRT Vulnerability Bulletin

                             ZMC-2021.09.15.1700
 Microsoft Office Products & Services and Web App Products: Multiple vulnerabilities
                               15th Sep 2021

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Product:          Microsoft 365 Apps for Enterprise
                  Microsoft Excel
                  Microsoft Office
                  Microsoft Office Online Server
                  Microsoft Office Web Apps Server
                  Microsoft SharePoint Enterprise Server
                  Microsoft SharePoint Foundation
                  Microsoft SharePoint Server
Operating System: Windows
                  Mac OS
Impact/Access:    Execute Arbitrary Code/Commands -- Existing Account
                  Provide Misleading Information  -- Existing Account
Resolution:       Patch/Upgrade
CVE Names:        CVE-2021-38660 CVE-2021-38659 CVE-2021-38658
                  CVE-2021-38657 CVE-2021-38656 CVE-2021-38655
                  CVE-2021-38654 CVE-2021-38653 CVE-2021-38652
                  CVE-2021-38651 CVE-2021-38650 CVE-2021-38646

OVERVIEW

        Microsoft has released its monthly security patch update for the
        month of September 2021.
        
        This update resolves 12 vulnerabilities across the following
        product(s): [1]
        
         Microsoft 365 Apps for Enterprise for 32-bit Systems
         Microsoft 365 Apps for Enterprise for 64-bit Systems
         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 Office 2013 RT Service Pack 1
         Microsoft Office 2013 Service Pack 1 (32-bit editions)
         Microsoft Office 2013 Service Pack 1 (64-bit editions)
         Microsoft Office 2016 (32-bit edition)
         Microsoft Office 2016 (64-bit edition)
         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 2013 Service Pack 1
         Microsoft SharePoint Server 2019


IMPACT

        Microsoft has given the following details regarding these vulnerabilities.
        
         Details         Impact                   Severity
         CVE-2021-38646  Remote Code Execution    Important
         CVE-2021-38650  Spoofing                 Important
         CVE-2021-38651  Spoofing                 Important
         CVE-2021-38652  Spoofing                 Important
         CVE-2021-38653  Remote Code Execution    Important
         CVE-2021-38654  Remote Code Execution    Important
         CVE-2021-38655  Remote Code Execution    Important
         CVE-2021-38656  Remote Code Execution    Important
         CVE-2021-38657  Remote Code Execution    Important
         CVE-2021-38658  Remote Code Execution    Important
         CVE-2021-38659  Remote Code Execution    Important
         CVE-2021-38660  Remote Code Execution    Important


MITIGATION

        Microsoft recommends updating the software with the version made
        available on the Microsoft Update Catalogue for the following
        Knowledge Base articles. [1].
        
         KB4484103, KB4484108, KB5001958, KB5001997, KB5001999
         KB5002003, KB5002005, KB5002007, KB5002009, KB5002014
         KB5002018, KB5002020, KB5002024


REFERENCES

        [1] Microsoft Security Update Guidance
            https://portal.msrc.microsoft.com/en-us/security-guidance


 
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