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AUSCERT External Security Bulletin Redistribution
ESB-2016.1718
MS16-090 - Important: Security Update for Windows
Kernel-Mode Drivers (3171481)
13 July 2016
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AusCERT Security Bulletin Summary
---------------------------------
Product: Microsoft Windows
Publisher: Microsoft
Operating System: Windows
Impact/Access: Administrator Compromise -- Existing Account
Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2016-3286 CVE-2016-3254 CVE-2016-3252
CVE-2016-3251 CVE-2016-3250 CVE-2016-3249
Original Bulletin:
https://technet.microsoft.com/en-us/library/security/MS16-090
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Microsoft Security Bulletin MS16-090 - Important
Security Update for Windows Kernel-Mode Drivers (3171481)
Published: July 12, 2016
Version: 1.0
Executive Summary
This security update resolves vulnerabilities in Microsoft Windows. The more
severe of 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
Windows 10
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core
installation)
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core
installation)
Windows Server 2012 (Server Core installation)
Windows Server 2012 R2 (Server Core installation)
Vulnerability Information
Multiple Win32k Elevation of Privilege Vulnerabilities
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 that
could exploit the vulnerabilities and take control of an affected system. The
update addresses these 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-2016-3249 No No
Win32k Elevation of Privilege Vulnerability CVE-2016-3250 No No
Win32k Elevation of Privilege Vulnerability CVE-2016-3252 No No
Win32k Elevation of Privilege Vulnerability CVE-2016-3254 No No
Win32k Elevation of Privilege Vulnerability CVE-2016-3286 No No
Win32k Information Disclosure Vulnerability - CVE-2016-3251
A Win32k information disclosure vulnerability exists when the Windows GDI
component improperly discloses kernel memory addresses. An attacker who
successfully exploited the vulnerability could obtain information to further
compromise the users system.
To exploit this vulnerability, an attacker would have to log on to an affected
system and run a specially crafted application. The vulnerability would not
allow an attacker to execute code or to elevate user rights directly, but it
could be used to obtain information that could be used to try to further
compromise the affected system. The security update addresses the
vulnerability by correcting how the Windows GDI component 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 Information Disclosure Vulnerability CVE-2016-3251 No No
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