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             AUSCERT External Security Bulletin Redistribution

         Microsoft Security Bulletin MS16-075: Security Update for
                       Windows SMB Server (3164038)
                               15 June 2016


        AusCERT Security Bulletin Summary

Product:           Microsoft Windows
Publisher:         Microsoft
Operating System:  Windows
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account
                   Increased Privileges            -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2016-3225  

Original Bulletin: 

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Microsoft Security Bulletin MS16-075: Security Update for Windows SMB Server 

Executive Summary

This security update resolves a vulnerability in Microsoft Windows. The 
vulnerability could allow elevation of privilege if an attacker logs on to the
system and runs a specially crafted application.

This security update is rated Important for all supported releases of 
Microsoft Windows.

Affected Software

Windows Vista

Windows Server 2008

Windows 7

Windows Server 2008 R2

Windows 8.1

Windows Server 2012

Windows Server 2012 R2

Windows RT 8.1

Windows 10

Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core 

Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core 

Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core 

Windows Server 2012 (Server Core installation)

Windows Server 2012 R2 (Server Core installation)

Vulnerability Information

Windows SMB Server Elevation of Privilege Vulnerability - CVE-2016-3225

An elevation of privilege vulnerability exists in the Microsoft Server Message
Block (SMB) when an attacker forwards an authentication request intended for 
another service running on the same machine. An attacker who successfully 
exploited this vulnerability could execute arbitrary code with elevated 

To exploit the vulnerability, an attacker would first have to log on to the 
system. An attacker could then run a specially crafted application that could
exploit the vulnerability and take control of an affected system. The update 
addresses the vulnerability by correcting how Windows Server Message Block 
(SMB) Server handles credential forwarding requests.

The following table contains links to the standard entry for each 
vulnerability in the Common Vulnerabilities and Exposures list:

Vulnerability title 					CVE number 	Publicly disclosed 	Exploited

Windows SMB Server Elevation of Privilege Vulnerability CVE-2016-3225 	Yes 			No

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