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-----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. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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. NOTE: This is only the original release of the security bulletin. 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: 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. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBWCJWAIx+lLeg9Ub1AQhuXQ//fKK7/Hs7M64wxL+jZFHHCrHH/7REcHVx bpGcLiegAhw6Q+0B0QHjz7qklnm/laVjtQRnLG3u2y+R7H7usBjuwKE0goVHDoJK SN4VyqWVvMBauZuAeZrhBpSSQFwN9BsrXhKLf4iDfqGo5eWWvbkKW1WPuiAKjw5d Wv5mz+wK/I4bvyx7bbMKx6DgNCpsvlyCORxdwYOCuM5K+wnR5afNuAweFnVYqIVK r1VyFuAPHNNWA+u8EjoI/1GCRZzGTkGEvefvGHlz+acWhcONp/x/Ls0ZUSP9p1uZ 9p6OSrk+b+vRCqFpec4+5k1f0hHsDoMqxksU7J871l0meIeSrprPYEDUBsEe1QFW ai2sJcdquyv3aIuio5VxDizntXF+UsyNF132mdQjF0UFCExy914wvT7qOE4FcIqE 7ZDSyhiNOfJjHAT1BAaZUsMQZjE4qwnhhvO/5AbRuqvm5oCSwQxt5Csxub6SEhF1 F2VuXuBNzr/QRQfzOpd9oQ3rVuS5RVPaXOInDDR8D0MuLRu0ltHkKKRR3sgmIrAx 4Ezt20Bh6EpSxbt/qm9rc6kvi46/YcZAnD9a5P48ws1GvqwsHdbb93V5kZjBx9oF qQe0fml3nhNsX1nFuv/4VDcI5xHnFOfgI66sZW8wufi+bFuoihBq6XRpg45egtde 8ABCHTYdi38= =Y31r -----END PGP SIGNATURE-----