Microsoft Security Bulletin MS16-153 - Important

Security Update for Common Log File System Driver (3207328)

Published: December 13, 2016

Version: 1.0

Executive Summary

This security update resolves a vulnerability in Microsoft Windows. The vulnerability could allow Information Disclosure when the Windows Common Log File System (CLFS) driver improperly handles objects in memory. In a local attack scenario, an attacker could exploit this vulnerability by running a specially crafted application to bypass security measures on the affected system allowing further exploitation.

This security update is rated Important for all supported releases of Microsoft Windows. For more information, see the Affected Software and Vulnerability Severity Ratings section.

The update addresses the vulnerability by correcting how CLFS handles objects in memory. For more information about this update, see Microsoft Knowledge Base Article 3207328.

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 December bulletin summary.

Note: Please see the Security Update Guide for a new approach to consuming the security update information. You can customize your views and create affected software spreadsheets, as well as download data via a restful API. For more information, please see the Security Updates Guide FAQ. As a reminder, the Security Updates Guide will be replacing security bulletins as of February 2017. Please see our blog post, Furthering our commitment to security updates, for more details.

**Operating System** [Windows Common Log File System Driver Information Disclosure Vulnerability - CVE-2016-7295](http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=cve-2016-7295) **Updates Replaced**\*
**Windows Vista**
[Windows Vista Service Pack 2](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3203838) (3203838) **Important**  Information Disclosure 3181707 in [MS16-134](http://go.microsoft.com/fwlink/?linkid=828018)
[Windows Vista x64 Edition Service Pack 2](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3203838) (3203838) **Important**  Information Disclosure 3181707 in [MS16-134](http://go.microsoft.com/fwlink/?linkid=828018)
**Windows Server 2008**
[Windows Server 2008 for 32-bit Systems Service Pack 2](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3203838) (3203838) **Important**  Information Disclosure 3181707 in [MS16-134](http://go.microsoft.com/fwlink/?linkid=828018)
[Windows Server 2008 for x64-based Systems Service Pack 2](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3203838) (3203838) **Important**  Information Disclosure 3181707 in [MS16-134](http://go.microsoft.com/fwlink/?linkid=828018)
[Windows Server 2008 for Itanium-based Systems Service Pack 2](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3203838) (3203838) **Important**  Information Disclosure 3181707 in [MS16-134](http://go.microsoft.com/fwlink/?linkid=828018)
**Windows 7**
[Windows 7 for 32-bit Systems Service Pack 1](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3205394) (3205394) Security Only[1] **Important**  Information Disclosure None
[Windows 7 for 32-bit Systems Service Pack 1](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3207752) (3207752) Monthly Rollup[1] **Important**  Information Disclosure [3197868](https://support.microsoft.com/kb/3197868)
[Windows 7 for x64-based Systems Service Pack 1](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3205394) (3205394) Security Only[1] **Important**  Information Disclosure None
[Windows 7 for x64-based Systems Service Pack 1](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3207752) (3207752) Monthly Rollup[1] **Important**  Information Disclosure [3197868](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3205397)
**Windows Server 2008 R2**
[Windows Server 2008 R2 for x64-based Systems Service Pack 1](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3205394) (3205394) Security Only[3] **Important**  Information Disclosure None
[Windows Server 2008 R2 for x64-based Systems Service Pack 1](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3207752) (3207752) Monthly Rollup[3] **Important**  Information Disclosure [3197868](https://support.microsoft.com/kb/3197868)
[Windows Server 2008 R2 for Itanium-based Systems Service Pack 1](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3205394) (3205394) Security Only[3] **Important**  Information Disclosure None
[Windows Server 2008 R2 for Itanium-based Systems Service Pack 1](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3207752) (3207752) Monthly Rollup[3] **Important**  Information Disclosure [3197868](https://support.microsoft.com/kb/3197868)
**Windows 8.1**
[Windows 8.1 for 32-bit Systems](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3205400) (3205400) Security Only[2] **Important**  Information Disclosure None
[Windows 8.1 for 32-bit Systems](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3205401) (3205401) Monthly Rollup[2] **Important**  Information Disclosure [3197874](https://support.microsoft.com/kb/3197874)
[Windows 8.1 for x64-based Systems](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3205400) (3205400) Security Only[2] **Important**  Information Disclosure None
[Windows 8.1 for x64-based Systems](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3205401) (3205401) Monthly Rollup[2] **Important**  Information Disclosure [3197874](https://support.microsoft.com/kb/3197874)
**Windows Server 2012 and Windows Server 2012 R2**
[Windows Server 2012](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3205408) (3205408) Security Only[3] **Important**  Information Disclosure None
[Windows Server 2012](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3205409) (3205409) Monthly Rollup[3] **Important**  Information Disclosure [3197877](https://support.microsoft.com/kb/3197877)
[Windows Server 2012 R2](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3205400) (3205400) Security Only[3] **Important**  Information Disclosure None
[Windows Server 2012 R2](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3197874) (3205401) Monthly Rollup[3] **Important**  Information Disclosure [3197874](https://support.microsoft.com/kb/3197874)
**Windows RT 8.1**
[Windows RT 8.1](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3205401)[1] (3205401) Monthly Rollup[2] **Important**  Information Disclosure [3197874](https://support.microsoft.com/kb/3197874)
**Windows 10**
[Windows 10 for 32-bit Systems](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3205383)[3] (3205383) **Important**  Information Disclosure [3198585](https://support.microsoft.com/kb/3198585)
[Windows 10 for x64-based Systems](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3205383)[3] (3205383) **Important**  Information Disclosure [3198585](https://support.microsoft.com/kb/3198585)
[Windows 10 Version 1511 for 32-bit Systems](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3205386)[3] (3205386) **Important**  Information Disclosure [3198586](https://support.microsoft.com/kb/3198586)
[Windows 10 Version 1511 for x64-based Systems](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3205386)[3] (3205386) **Important**  Information Disclosure [3198586](https://support.microsoft.com/kb/3198586)
[Windows 10 Version 1607 for 32-bit Systems](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3206632)[3] (3206632) **Important**  Information Disclosure [3200970](https://support.microsoft.com/kb/3200970)
[Windows 10 Version 1607 for 64-bit Systems](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3206632)[3] (3206632) **Important**  Information Disclosure [3200970](https://support.microsoft.com/kb/3200970)
**Windows Server 2016**
[Windows Server 2016 for x64](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3206632)[2] (3206632) **Important**  Information Disclosure [3200970](https://support.microsoft.com/kb/3200970)
**Server Core installation option**
[Windows Server 2008 for 32-bit Systems Service Pack 2](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3203838)(Server Core installation) (3203838) **Important**  Information Disclosure 3181707 in [MS16-134](http://go.microsoft.com/fwlink/?linkid=828018)
[Windows Server 2008 for x64-based Systems Service Pack 2](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3203838)(Server Core installation) (3203838) **Important**  Information Disclosure 3181707 in [MS16-134](http://go.microsoft.com/fwlink/?linkid=828018)
[Windows Server 2008 R2 for x64-based Systems Service Pack 1](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3205394)(Server Core installation) (3205394) Security Only[3] **Important**  Information Disclosure None
[Windows Server 2008 R2 for x64-based Systems Service Pack 1](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3207752)(Server Core installation) (3207752) Monthly Rollup[3] **Important**  Information Disclosure [3197868](https://support.microsoft.com/kb/3197868)
[Windows Server 2012](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3205408)(Server Core installation) (3205408) Security Only[3] **Important**  Information Disclosure None
[Windows Server 2012](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3205409)(Server Core installation) (3205409) Monthly Rollup[3] **Important**  Information Disclosure [3197877](https://support.microsoft.com/kb/3197877)
[Windows Server 2012 R2](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3205400)(Server Core installation) (3205400) Security Only[3] **Important**  Information Disclosure None
[Windows Server 2012 R2](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3205401)(Server Core installation) (3205401) Monthly Rollup[3] **Important**  Information Disclosure [3197874](https://support.microsoft.com/kb/3197874)
[Windows Server 2016 for x64-based Systems](http://catalog.update.microsoft.com/v7/site/search.aspx?q=kb3206632) (Server Core installation) [2] (3206632) **Important**  Information Disclosure [3200970](https://support.microsoft.com/kb/3200970)
[1]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 and Windows Server 2016. For more information, please see this [Microsoft TechNet article](https://blogs.technet.microsoft.com/windowsitpro/2016/08/15/further-simplifying-servicing-model-for-windows-7-and-windows-8-1/).

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

[3]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 update is available via the Windows Update Catalog. Please note that effective December 13, 2016, Windows 10 and Windows Server 2016 details for the Cumulative Updates will be documented in Release Notes. Please refer to the Release Notes for OS Build numbers, Known Issues, and affected file list information.

Note The vulnerability discussed in this bulletin affects Windows Server 2016 Technical Preview 5. Although an update is available for Windows Server 2016 Technical Preview 5 via Windows Update, Microsoft recommends that customers upgrade to Window Server 2016 at your earliest convenience. 

*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 Package Details tab).

Vulnerability Information

Windows Common Log File System Driver Information Disclosure Vulnerability-CVE-2016-7295

An information disclosure vulnerability exists when the Windows Common Log File System (CLFS) driver improperly handles objects in memory. In a local attack scenario, an attacker could exploit this vulnerability by running a specially crafted application to bypass security measures on the affected system allowing further exploitation.  

The update addresses the vulnerability by correcting how Windows CLFS 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
Windows Common Log File System Driver Information Disclosure Vulnerability CVE-2016-7295 No No
### Mitigating Factors Microsoft has not identified any [mitigating factors](https://technet.microsoft.com/library/security/dn848375.aspx) for this vulnerability. ### Workarounds The Microsoft has not identified any [workarounds](https://technet.microsoft.com/library/security/dn848375.aspx) for this vulnerability. Security Update Deployment -------------------------- For Security Update Deployment information see the Microsoft Knowledge Base article referenced [here](#kbarticle) 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](https://technet.microsoft.com/library/security/mt674627.aspx) 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 (December 13, 2016): Bulletin published. *Page generated 2016-12-09 10:24Z-08:00.*