Microsoft Security Bulletin MS16-113 - Important
Security Update for Windows Secure Kernel Mode (3185876)
Published: September 13, 2016
Version: 1.0
Executive Summary
This security update resolves a vulnerability in Microsoft Windows. The vulnerability could allow information disclosure when Windows Secure Kernel Mode improperly handles objects in memory.
This security update is rated Important for all supported editions of Windows 10 and Windows 10 Version 1511. For more information, see the Affected Software and Vulnerability Severity Ratings section.
The security update addresses the vulnerability by correcting how Windows handles objects in memory to prevent information disclosure. For more information about the vulnerability, see the Vulnerability Information section.
For more information about this update, see Microsoft Knowledge Base Article 3185876.
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 severity ratings indicated for each affected software 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 September bulletin summary.
**Operating System** | [**Windows Secure Kernel Mode Information Disclosure Vulnerability- CVE-2016-3344**](http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=cve-2016-3344) | **Updates Replaced**\* |
**Windows 10** | ||
[Windows 10 for 32-bit Systems](https://support.microsoft.com/kb/3185611)[1] (3185611) | **Important** Information Disclosure | [3176492](https://support.microsoft.com/kb/3176492) |
[Windows 10 for x64-based Systems](https://support.microsoft.com/kb/3185611)[1] (3185611) | **Important** Information Disclosure | [3176492](https://support.microsoft.com/kb/3176492) |
[Windows 10 Version 1511 for 32-bit Systems](https://support.microsoft.com/kb/3185614)[1] (3185614) | **Important** Information Disclosure | [3176493](https://support.microsoft.com/kb/3176493) |
[Windows 10 Version 1511 for x64-based Systems](https://support.microsoft.com/kb/3185614)[1] (3185614) | **Important** Information Disclosure | [3176493](https://support.microsoft.com/kb/3176493) |
Note The vulnerability discussed in this bulletin affects Windows Server 2016 Technical Preview 4 and Windows Server 2016 Technical Preview 5. An update is available for Windows Server 2016 Technical Preview 5 via Windows Update. However, no update is available for Windows Server 2016 Technical Preview 4. To be protected from the vulnerability, Microsoft recommends that customers running Windows Server 2016 Technical Preview 4 upgrade to Windows Server 2016 Technical Preview 5.
*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 Secure Kernel Mode Information Disclosure Vulnerability – CVE-2016-3344
An information disclosure vulnerability exists in Windows when Windows Secure Kernel Mode improperly handles objects in memory. A locally-authenticated attacker could attempt to exploit the vulnerability by running a specially crafted application on a targeted system. Note that the information disclosure vulnerability alone would not be sufficient for an attacker to compromise a system, but would have to be combined with additional vulnerabilities to further exploit the system.
The security update addresses the vulnerability by correcting how Windows handles objects in memory to prevent information disclosure.
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 Secure Kernel Mode Information Disclosure Vulnerability | CVE-2016-3344 | No | No |