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                         AUSCERT Security Bulletin

                               ASB-2021.0042
        Microsoft Patch Tuesday update for Extended Security Update
                        products for February 2021
                             10 February 2021

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

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

Product:          Windows 7
                  Windows Server 2008
Operating System: Windows
Impact/Access:    Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                  Increased Privileges            -- Existing Account      
                  Denial of Service               -- Remote/Unauthenticated
                  Access Confidential Data        -- Remote/Unauthenticated
Resolution:       Patch/Upgrade
CVE Names:        CVE-2021-25195 CVE-2021-24103 CVE-2021-24102
                  CVE-2021-24094 CVE-2021-24088 CVE-2021-24086
                  CVE-2021-24083 CVE-2021-24080 CVE-2021-24078
                  CVE-2021-24077 CVE-2021-24074 CVE-2021-1734
                  CVE-2021-1727 CVE-2021-1722 

OVERVIEW

        Microsoft has released its monthly security patch update for the
        month of February 2021.
        This update resolves 14 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-2021-1722   Remote Code Execution    Critical
         CVE-2021-1727   Elevation of Privilege   Important
         CVE-2021-1734   Information Disclosure   Important
         CVE-2021-24074  Remote Code Execution    Critical
         CVE-2021-24077  Remote Code Execution    Critical
         CVE-2021-24078  Remote Code Execution    Critical
         CVE-2021-24080  Denial of Service        Moderate
         CVE-2021-24083  Remote Code Execution    Important
         CVE-2021-24086  Denial of Service        Important
         CVE-2021-24088  Remote Code Execution    Critical
         CVE-2021-24094  Remote Code Execution    Critical
         CVE-2021-24102  Elevation of Privilege   Important
         CVE-2021-24103  Elevation of Privilege   Important
         CVE-2021-25195  Elevation of Privilege   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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