MS14-002: Vulnerability in Windows Kernel Could Allow Elevation of Privilege (2914368)

This security update resolves a publicly disclosed vulnerability in Microsoft Windows.

Microsoft Security Bulletin MS14-002 - Important
Vulnerability in Windows Kernel Could Allow Elevation of Privilege (2914368)
Published: Tuesday, January 14, 2014

Version: 1.0

General Information
Executive Summary
This security update resolves a publicly disclosed vulnerability in Microsoft Windows. The vulnerability could allow elevation of privilege if an attacker logs on to a system and runs a specially crafted application. An attacker must have valid logon credentials and be able to log on locally to exploit this vulnerability.

This security update is rated Important for all supported editions of Windows XP and Windows Server 2003. For more information, see the subsection, Affected and Non-Affected Software, in this section.

The security update addresses the vulnerability by correcting how input passed to the NDProxy.sys kernel component is validated. For more information about the vulnerability, see the Frequently Asked Questions (FAQ) subsection for the specific vulnerability entry under the next section, Vulnerability Information.

This security update also addresses the vulnerability first described in Microsoft Security Advisory 2814486.

Recommendation. Most customers have automatic updating enabled and will not need to take any action because this security update will be downloaded and installed automatically. Customers who have not enabled automatic updating need to check for updates and install this update manually. For information about specific configuration options in automatic updating, see Microsoft Knowledge Base Article 294871.

For administrators and enterprise installations, or end users who want to install this security update manually, Microsoft recommends that customers apply the update at the earliest opportunity using update management software, or by checking for updates using the Microsoft Update service.

See also the section, Detection and Deployment Tools and Guidance, later in this bulletin.

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Knowledge Base Article
Knowledge Base Article    2914368
File information    Yes
SHA1/SHA2 hashes    Yes
Known issues    None
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Affected and Non-Affected Software
The following software has been tested to determine which versions or editions are affected. Other versions or editions 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.

Affected Software

Operating System    Maximum Security Impact    Aggregate Severity Rating    Updates Replaced
Windows XP
Windows XP Service Pack 3
(2914368)    Elevation of Privilege    Important    2440591 in MS10-099
Windows XP Professional x64 Edition Service Pack 2
(2914368)    Elevation of Privilege    Important    2440591 in MS10-099
Windows Server 2003
Windows Server 2003 Service Pack 2
(2914368)    Elevation of Privilege    Important    2440591 in MS10-099
Windows Server 2003 x64 Edition Service Pack 2
(2914368)    Elevation of Privilege    Important    2440591 in MS10-099
Windows Server 2003 with SP2 for Itanium-based Systems
(2914368)    Elevation of Privilege    Important    2440591 in MS10-099


Non-Affected Software

Operating System
Windows Vista Service Pack 2
Windows Vista x64 Edition Service Pack 2
Windows Server 2008 for 32-bit Systems Service Pack 2
Windows Server 2008 for x64-based Systems Service Pack 2
Windows Server 2008 for Itanium-based Systems Service Pack 2
Windows 7 for 32-bit Systems Service Pack 1
Windows 7 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for Itanium-based Systems Service Pack 1
Windows 8 for 32-bit Systems
Windows 8 for x64-based Systems
Windows 8.1 for 32-bit Systems
Windows 8.1 for x64-based Systems
Windows Server 2012
Windows Server 2012 R2
Windows RT
Windows RT 8.1
Server Core installation option
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
Windows Server 2012 R2 (Server Core installation)
Windows Server 2012 (Server Core installation)
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Update FAQ
Vulnerability Information
Severity Ratings and Vulnerability Identifiers
Kernel NDProxy Vulnerability - CVE-2013-5065
An elevation of privilege vulnerability exists in the NDProxy component of the Windows kernel due to improper validation of input passed from user mode to the kernel. The vulnerability could allow an attacker to run code in kernel mode. An attacker who successfully exploited this vulnerability could run a specially crafted application and take complete control of an affected system. The attacker could then install programs; view, change, or delete data; or create new accounts with full administrator rights.

To view this vulnerability as a standard entry in the Common Vulnerabilities and Exposures list, see CVE-2013-5065.

Mitigating Factors
Workarounds
FAQ
What is the scope of the vulnerability?
This is an elevation of privilege vulnerability.

What causes the vulnerability?
The vulnerability is caused when the NDProxy.sys kernel component fails to properly validate input.

What is NDPROXY?
NDPROXY is a system-provided driver that interfaces WAN miniport drivers, call managers, and miniport call managers to the Telephony Application Programming Interfaces (TAPI) services. For additional information, see NDPROXY Overview.

What might an attacker use the vulnerability to do?
An attacker who successfully exploited this 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 administrative rights.

How could an attacker exploit the vulnerability?
To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take complete control over the affected system.

What systems are primarily at risk from the vulnerability?
Workstations and terminal servers are primarily at risk. Servers could be at more risk if administrators allow users to log on to servers and to run programs. However, best practices strongly discourage allowing this.

What does the update do?
The update addresses the vulnerability by correcting how input passed to the NDProxy.sys kernel component is validated.

When this security bulletin was issued, had this vulnerability been publicly disclosed?
Yes. This vulnerability has been publicly disclosed. It has been assigned Common Vulnerability and Exposure number CVE-2013-5065. This vulnerability was first described in Microsoft Security Advisory 2914486.

When this security bulletin was issued, had Microsoft received any reports that this vulnerability was being exploited?
Yes. Microsoft is aware of limited, targeted attacks that attempt to exploit this vulnerability.

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Update Information
Detection and Deployment Tools and Guidance
Security Update Deployment
Affected Software

For information about the specific security update for your affected software, click the appropriate link:

Windows XP (all editions)
Windows Server 2003 (all editions)
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Other Information
Acknowledgments
Microsoft thanks the following for working with us to help protect customers:

FireEye, Inc. for helping us with the Kernel NDProxy Vulnerability (CVE-2013-5065)
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Microsoft Active Protections Program (MAPP)
To improve security protections for customers, Microsoft provides vulnerability information to major security software providers in advance of each monthly security update release. Security software providers can then use this vulnerability information to provide updated protections to customers via their security software or devices, such as antivirus, network-based intrusion detection systems, or host-based intrusion prevention systems. To determine whether active protections are available from security software providers, please go to the active protections websites provided by program partners, listed in Microsoft Active Protections Program (MAPP) Partners.

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Support
How to obtain help and support for this security update

Help installing updates: Support for Microsoft Update
Security solutions for IT professionals: TechNet Security Troubleshooting and Support
Help protect your computer that is running Windows from viruses and malware: Virus Solution and Security Center
Local support according to your country: International Support
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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.

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Revisions
V1.0 (January 14, 2014): Bulletin published.
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