ASB-2017.0148.2 - UPDATED ALERT [Win] Microsoft .NET Framework: Execute arbitrary code/commands - Remote with user interaction 2017-09-18

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                         AUSCERT Security Bulletin

                              ASB-2017.0148.2
               Security updates for Microsoft ,NET Framework
                             18 September 2017

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

Product:              Microsoft .NET Framework
Operating System:     Windows
Impact/Access:        Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution:           Patch/Upgrade
CVE Names:            CVE-2017-8759  
Member content until: Friday, October 13 2017

Revision History:     September 18 2017: There are now published POCs.
                      September 13 2017: Initial Release

OVERVIEW

        Microsoft has released its monthly security patch update for the 
        month of September 2017. [1]
        
        This update resolves 1 vulnerabilities across the following 
        products:
        
         Microsoft .NET Framework 2.0 Service Pack 2
        
         Microsoft .NET Framework 3.5
        
         Microsoft .NET Framework 3.5.1
        
         Microsoft .NET Framework 4.5.2
        
         Microsoft .NET Framework 4.6
        
         Microsoft .NET Framework 4.6.1
        
         Microsoft .NET Framework 4.6.2/4.7
        
         Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7
        
         Microsoft .NET Framework 4.7


IMPACT

        Microsoft has given the following details regarding these vulnerabilities.
        
         Details         Impact                   Severity
         CVE-2017-8759   Remote Code Execution    Important


MITIGATION

        Microsoft recommends updating the software with the version made 
        available on the Microsoft Update Cataloge for the following 
        Knowledge Base articles. [1]
        
        KB4040960, KB4040964, KB4040965, KB4040966, KB4040967 KB4040959, 
        KB4040980, KB4040981, KB4041086, KB4040957 KB4040973, KB4040972, 
        KB4040971, KB4040956, KB4040977 KB4040958, KB4040975, KB4040974, 
        KB4040955, KB4040979 KB4040978, KB4038788, KB4038783, KB4038782, 
        KB4038781


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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