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                         AUSCERT Security Bulletin

                               ASB-2019.0185
   Microsoft Skype for Business and Lync security updates for July 2019
                               10 July 2019

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

Product:              Microsoft Skype for Business and Lync
Operating System:     Windows
Impact/Access:        Access Confidential Data -- Existing Account
Resolution:           Patch/Upgrade
CVE Names:            CVE-2019-1084  
Member content until: Friday, August  9 2019

OVERVIEW

        Microsoft has released its monthly security patch update for the month
         of July 2019. [1]
        
        This update resolves 1 vulnerability across the following products: 
        
         Microsoft Lync 2013 Service Pack 1 (32-bit)
         Microsoft Lync 2013 Service Pack 1 (64-bit)
         Microsoft Lync Basic 2013 Service Pack 1 (32-bit)
         Microsoft Lync Basic 2013 Service Pack 1 (64-bit)
         Skype for Business 2016 (32-bit)
         Skype for Business 2016 (64-bit)
         Skype for Business 2016 Basic (32-bit)
         Skype for Business 2016 Basic (64-bit)


IMPACT

        Microsoft has given the following details regarding the 
        vulnerability.
        
         Details         Impact                   Severity
         CVE-2019-1084   Information Disclosure   Important


MITIGATION

        Microsoft recommends updating the software with the version made 
        available on the Microsoft Update Cataloge for the following 
        Knowledge Base articles. [1]
        
         KB4475545, KB4475519


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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