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                         AUSCERT Security Bulletin

                               ASB-2017.0143
                Microsoft Exchange Server Security Updates
                             13 September 2017

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

Product:              Microsoft Exchange Server
Operating System:     Windows
Impact/Access:        Increased Privileges     -- Remote with User Interaction
                      Access Privileged Data   -- Remote with User Interaction
                      Cross-site Scripting     -- Remote with User Interaction
                      Access Confidential Data -- Remote/Unauthenticated      
Resolution:           Patch/Upgrade
CVE Names:            CVE-2017-11761 CVE-2017-8758 
Member content until: Friday, October 13 2017

OVERVIEW

        Microsoft has released its monthly security patch update for the 
        month of September 2017. [1]
        
        This update resolves 2 vulnerabilities across the following 
        products:
        
         Microsoft Exchange Server 2013 Cumulative Update 16
        
         Microsoft Exchange Server 2013 Cumulative Update 17
        
         Microsoft Exchange Server 2013 Service Pack 1
        
         Microsoft Exchange Server 2016 Cumulative Update 5
        
         Microsoft Exchange Server 2016 Cumulative Update 6


IMPACT

        Microsoft has given the following details regarding these vulnerabilities.
        
         Details         Impact                   Severity
        
         CVE-2017-11761  Information Disclosure   Important
        
         CVE-2017-8758   Elevation of Privilege   Important


MITIGATION

        Microsoft recommends updating the software with the version made 
        available on the Microsoft Update Cataloge for the following 
        Knowledge Base articles. [1]
        
        KB4036108


REFERENCES

        [1] Security Updates
            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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