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             AUSCERT External Security Bulletin Redistribution

        Microsoft Security Bulletin MS16-098 - Important: Security
             Update for Windows Kernel-Mode Drivers (3178466)
                               9 August 2016


        AusCERT Security Bulletin Summary

Product:           Microsoft Windows
Publisher:         Microsoft
Operating System:  Windows
Impact/Access:     Administrator Compromise -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2016-3311 CVE-2016-3310 CVE-2016-3309

Original Bulletin: 

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Microsoft Security Bulletin MS16-098 - Important: Security Update for Windows
Kernel-Mode Drivers (3178466)

Executive Summary

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

This security update is rated Important for all supported releases of 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 [1]

Windows 10 [2]

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)

[1] This update is only available via Windows Update.

[2] Windows 10 updates are cumulative. The monthly security release includes 
all security fixes for vulnerabilities that affect Windows 10, in addition to 
non-security updates. The updates are available via the Microsoft Update 

Vulnerability Information

Multiple Win32k Elevation of Privilege Vulnerabilities

Multiple elevation of privilege vulnerabilities exist when the Windows 
kernel-mode driver fails to properly handle objects in memory. An attacker who
successfully exploited these vulnerabilities could run arbitrary code in 
kernel mode. An attacker could then install programs; view, change, or delete
data; or create new accounts with full user rights.

To exploit these vulnerabilities, an attacker would first have to log on to 
the system. An attacker could then run a specially crafted application to take
control of an affected system. The update addresses the vulnerabilities by 
correcting how the Windows kernel-mode driver handles objects in memory.

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

Win32k Elevation of Privilege Vulnerability 	CVE-2016-3308 	No 			No

Win32k Elevation of Privilege Vulnerability 	CVE-2016-3309 	No 			No

Win32k Elevation of Privilege Vulnerability 	CVE-2016-3310 	No 			No

Win32k Elevation of Privilege Vulnerability 	CVE-2016-3311 	No 			No

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