09 November 2016
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2016.2673 Microsoft Security Bulletin MS16-135 - Important: Security Update for Windows Kernel-Mode Drivers (3199135) 9 November 2016 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Microsoft Windows Publisher: Microsoft Operating System: Windows Impact/Access: Increased Privileges -- Existing Account Access Confidential Data -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2016-7255 CVE-2016-7246 CVE-2016-7218 CVE-2016-7215 CVE-2016-7214 Original Bulletin: https://technet.microsoft.com/en-us/library/security/MS16-135 - --------------------------BEGIN INCLUDED TEXT-------------------- Microsoft Security Bulletin MS16-135 - Important: Security Update for Windows Kernel-Mode Drivers (3199135) Severity: Important KB Article: 3199135 Version: 1.0 Executive Summary This security update resolves vulnerabilities in Microsoft Windows. The most 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 and Windows Server 2012 R2 Windows RT 8.1 Windows 10 Windows Server 2016 Vulnerability Information Win32k Information Disclosure Vulnerability - CVE-2016-7214 An Information disclosure vulnerability exists in the Windows kernel that could allow an attacker to retrieve information that could lead to a Kernel Address Space Layout Randomization (ASLR) bypass. An attacker who successfully exploited the vulnerability could retrieve the memory address of a kernel object. To exploit the vulnerability, an attacker would have to log on to an affected system and run a specially crafted application. The security update addresses the vulnerability by correcting how the Windows kernel handles memory addresses. 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-2016-7214 No No Win32k Elevation of Privilege Vulnerability Multiple elevation of privilege vulnerabilities exists when the Windows kernel-mode driver fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability 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 the 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 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-2016-7215 No No Win32k Elevation of Privilege Vulnerability CVE-2016-7246 No No Win32k Elevation of Privilege Vulnerability CVE-2016-7255 Yes Yes* *Note for CVE-2016-7255: Microsoft implemented new exploit mitigations in the Windows 10 Anniversary Update version of the win32k kernel component. These Windows 10 Anniversary Update mitigations, which were developed based on proactive internal research, stop all observed in-the-wild instances of this exploit. Windows Bowser.sys Information Disclosure Vulnerability - CVE-2016-7218 An information disclosure vulnerability exists in Windows when the Windows bowser.sys kernel-mode driver fails to properly handle objects in memory. To exploit this vulnerability, an authenticated attacker would run a specially crafted application. The update addresses this vulnerability 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 Microsoft Browser Information Disclosure Vulnerability CVE-2016-7218 No No - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: email@example.com 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). 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