Microsoft Security Bulletin MS16-135 - Important
Security Update for Windows Kernel-Mode Drivers (3199135)
Published: November 8, 2016 | Updated: December 13, 2016
Version: 2.0
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. For more information, see the Affected Software and Vulnerability Severity Ratings section.
The security update addresses the vulnerabilities by correcting how the Windows kernel-mode driver handles objects in memory.
For more information about the vulnerabilities, see the Vulnerability Information section.
For more information about this update, see Microsoft Knowledge Base Article 3199135.
Affected Software and Vulnerability Severity Ratings
The following software versions or editions are affected. Versions or editions that are not listed are either past their support life cycle or are not affected. To determine the support life cycle for your software version or edition, see Microsoft Support Lifecycle.
The following severity ratings assume the potential maximum impact of the vulnerability. For information regarding the likelihood, within 30 days of this security bulletin's release, of the exploitability of the vulnerability in relation to its severity rating and security impact, please see the Exploitability Index in the November bulletin summary.
| Operating System | Win32k Information Disclosure Vulnerability - CVE-2016-7214 | Win32k Elevation of Privilege Vulnerability - CVE-2016-7215 | Windows Bowser.sys Information Disclosure Vulnerability - CVE- 2016-7218 | Win32k Elevation of Privilege Vulnerability - CVE-2016-7246 | Win32k Elevation of Privilege Vulnerability - CVE-2016-7255 | UpdatesReplaced* |
|---|---|---|---|---|---|---|
| Windows Vista | ||||||
| Windows Vista Service Pack 2 (3198234) | Important Information Disclosure | Important Elevation of Privilege | Not applicable | Not applicable | Important Elevation of Privilege | 3177725 in MS16-098 |
| Windows Vista x64 Edition Service Pack 2 (3198234) | Important Information Disclosure | Important Elevation of Privilege | Not applicable | Not applicable | Important Elevation of Privilege | 3177725 in MS16-098 |
| Windows Vista Service Pack 2 (3194371) | Not applicable | Not applicable | Important Information Disclosure | Not applicable | Not applicable | 3184122 in MS16-116 |
| Windows Vista x64 Edition Service Pack 2 (3194371) | Not applicable | Not applicable | Important Information Disclosure | Not applicable | Not applicable | 3184122 in MS16-116 |
| Windows Server 2008 | ||||||
| Windows Server 2008 for 32-bit Systems Service Pack 2 (3198234) | Important Information Disclosure | Important Elevation of Privilege | Not applicable | Not applicable | Important Elevation of Privilege | 3177725 in MS16-098 |
| Windows Server 2008 for x64-based Systems Service Pack 2 (3198234) | Important Information Disclosure | Important Elevation of Privilege | Not applicable | Not applicable | Important Elevation of Privilege | 3177725 in MS16-098 |
| Windows Server 2008 for Itanium-based Systems Service Pack 2 (3198234) | Important Information Disclosure | Important Elevation of Privilege | Not applicable | Not applicable | Important Elevation of Privilege | 3177725 in MS16-098 |
| Windows Server 2008 for 32-bit Systems Service Pack 2 (3194371) | Not applicable | Not applicable | Important Information Disclosure | Not applicable | Not applicable | 3184122 in MS16-116 |
| Windows Server 2008 for x64-based Systems Service Pack 2 (3194371) | Not applicable | Not applicable | Important Information Disclosure | Not applicable | Not applicable | 3184122 in MS16-116 |
| Windows Server 2008 for Itanium-based Systems Service Pack 2 (3194371) | Not applicable | Not applicable | Important Information Disclosure | Not applicable | Not applicable | 3184122 in MS16-116 |
| Windows 7 | ||||||
| Windows 7 for 32-bit Systems Service Pack 1 (3197867) Security Only[3] | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | None |
| Windows 7 for 32-bit Systems Service Pack 1 (3197868) Monthly Rollup[3] | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | 3185330 |
| Windows 7 for x64-based Systems Service Pack 1 (3197867) Security Only[3] | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | None |
| Windows 7 for x64-based Systems Service Pack 1 (3197868) Monthly Rollup[3] | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | 3185330 |
| Windows Server 2008 R2 | ||||||
| Windows Server 2008 R2 for x64-based Systems Service Pack 1 (3197867) Security Only[3] | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | None |
| Windows Server 2008 R2 for x64-based Systems Service Pack 1 (3197868) Monthly Rollup[3] | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | 3185330 |
| Windows Server 2008 R2 for Itanium-based Systems Service Pack 1 (3197867) Security Only[3] | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | None |
| Windows Server 2008 R2 for Itanium-based Systems Service Pack 1 (3197868) Monthly Rollup[3] | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | 3185330 |
| Windows 8.1 | ||||||
| Windows 8.1 for 32-bit Systems (3197873) Security Only[3] | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | None |
| Windows 8.1 for 32-bit Systems (3197874) Monthly Rollup[3] | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | 3185331 |
| Windows 8.1 for x64-based Systems (3197873) Security Only[3] | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | None |
| Windows 8.1 for x64-based Systems (3197874) Monthly Rollup[3] | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | 3185331 |
| Windows Server 2012 and Windows Server 2012 R2 | ||||||
| Windows Server 2012 (3197876) Security Only[3] | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | None |
| Windows Server 2012 (3197877) Monthly Rollup[3] | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | 3185332 |
| Windows Server 2012 R2 (3197873) Security Only[3] | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | None |
| Windows Server 2012 R2 (3197874) Monthly Rollup[3] | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | 3185331 |
| Windows RT 8.1 | ||||||
| Windows RT 8.1[1](3197874) Monthly Rollup[3] | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | 3185331 |
| Windows 10 | ||||||
| Windows 10 for 32-bit Systems[2](3198585) | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | 3192440 |
| Windows 10 for x64-based Systems[2](3198585) | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | 3192440 |
| Windows 10 Version 1511 for 32-bit Systems[2](3198586) | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | 3192441 |
| Windows 10 Version 1511 for x64-based Systems[2](3198586) | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | 3192441 |
| Windows 10 Version 1607 for 32-bit Systems[2] (3200970) | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | 3194798 |
| Windows 10 Version 1607 for x64-based Systems [2] (3200970) | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | 3194798 |
| Windows Server 2016 | ||||||
| Windows Server 2016 for x64-based Systems[2]\ (3200970) | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | 3194798 |
| Server Core installation option | ||||||
| Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) (3198234) | Important Information Disclosure | Important Information Disclosure | Not applicable | Not applicable | Important Elevation of Privilege | 3177725 in MS16-098 |
| Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) (3194371) | Not applicable | Not applicable | Important Information Disclosure | Not applicable | Important Elevation of Privilege | 3184122 in MS16-116 |
| Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) (3198234) | Important Information Disclosure | Important Information Disclosure | Not applicable | Not applicable | Important Elevation of Privilege | 3177725 in MS16-098 |
| Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) (3194371) | Not applicable | Not applicable | Important Information Disclosure | Not applicable | Important Elevation of Privilege | 3184122 in MS16-116 |
| Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) (3197867) Security Only[3] | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | None |
| Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) (3197868) Monthly Rollup[3] | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | 3185330 |
| Windows Server 2012 (Server Core installation) (3197876) Security Only[3] | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | None |
| Windows Server 2012 (Server Core installation) (3197877) Monthly Rollup[3] | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | 3185332 |
| Windows Server 2012 R2 (Server Core installation) (3197873) Security Only[3] | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | None |
| Windows Server 2012 R2 (Server Core installation) (3197874) Monthly Rollup[3] | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | 3185331 |
| Windows Server 2016 for x64-based Systems (Server Core installation) [2](3200970) | Important Information Disclosure | Important Elevation of Privilege | Important Information Disclosure | Important Elevation of Privilege | Important Elevation of Privilege | 3194798 |
[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 Catalog.
[3]Beginning with the October 2016 release, Microsoft is changing the update servicing model for Windows 7, Windows Server 2008 R2, Windows 8.1, Windows Server 2012, and Windows Server 2012 R2. For more information, please see this Microsoft TechNet article.
*The Updates Replaced column shows only the latest update in any chain of superseded updates. For a comprehensive list of updates replaced, go to the Microsoft Update Catalog, search for the update KB number, and then view update details (updates replaced information is provided on the PackageDetails tab).
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 |
Mitigating Factors
Microsoft has not identified any mitigating factors for this vulnerability.
Workarounds
Microsoft has not identified any workarounds for this vulnerability.
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.
Mitigating Factors
Microsoft has not identified any mitigating factors for the vulnerabilities.
Workarounds
Microsoft has not identified any workarounds for the vulnerabilities.
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. An attacker who successfully exploited the vulnerability could potentially disclose contents of system memory to which they should not have access.
To exploit this vulnerability, an authenticated attacker would run a specially crafted application in user mode. 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 |
Mitigating Factors
The following mitigating factors may be helpful in your situation:
- An attacker must have valid logon credentials and be able to log on locally.
Workarounds
Microsoft has not identified any workarounds for this vulnerability.
Security Update Deployment
For Security Update Deployment information see the Microsoft Knowledge Base article referenced in the Executive Summary.
Acknowledgments
Microsoft recognizes the efforts of those in the security community who help us protect customers through coordinated vulnerability disclosure. See Acknowledgments for more information.
Disclaimer
The information provided in the Microsoft Knowledge Base is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.
Revisions
- V1.0 (November 8, 2016): Bulletin published.
- V2.0 (December 13, 2016): Revised bulletin to announce the following updates have been rereleased with a detection change that addresses a supersedence issue that certain customers experienced when attempting to install the November Security Only updates.
- Security Only update 3197867 for all supported releases of Windows 7 and Windows Server 2008 R2. For more information, see Microsoft Knowledge Base Article 3197867.
- Monthly Rollup 3197868 for all supported releases of Windows 7 and Windows Server 2008 R2. For more information, see Microsoft Knowledge Base Article 3197868.
- Security Only update 3197876 for Windows Server 2012. For more information, see Microsoft Knowledge Base Article 3197876.
- Monthly Rollup 3197877 for Windows Server 2012. For more information, see Microsoft Knowledge Base Article 3197877.
- Security Only update 3197873 for Windows 8.1 and Windows Server 2012 R2. For more information, see Microsoft Knowledge Base Article 3197873.
- Monthly Rollup 3197874 for Windows 8.1 and Windows Server 2012 R2. For more information, see Microsoft Knowledge Base Article 3197874.
- These are detection changes only. There were no changes to the update files. Customers who have already successfully installed any of these updates do not need to take any action. For more information, see the Microsoft Knowledge Base article for the respective update.
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