Microsoft Security Bulletin MS14-016 - Important

Vulnerability in Security Account Manager Remote (SAMR) Protocol Could Allow Security Feature Bypass (2934418)

Published: March 11, 2014 | Updated: September 10, 2014

Version: 1.2

General Information

Executive Summary

This security update resolves one privately reported vulnerability in Microsoft Windows. The vulnerability could allow security feature bypass if an attacker makes multiple attempts to match passwords to a username.

This security update is rated Important for all supported editions of Windows XP, Windows Server 2003, Windows Vista, Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, and Windows Server 2012 R2. For more information, see the subsection, Affected and Non-Affected Software, in this section.

The security update addresses the vulnerability by correcting the manner in which Windows validates user lockout state. For more information about the vulnerability, see the Frequently Asked Questions (FAQ) subsection for the specific vulnerability entry under the next section, Vulnerability Information.

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.

Knowledge Base Article

• Knowledge Base Article: 2934418
• File Information: Yes
• SHA1/SHA2 hashes: Yes
• Known Issues: None

 

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](https://www.microsoft.com/download/details.aspx?familyid=61a0e427-20b9-4aca-b9fa-87e0da38caad) (With Active Directory Application Mode installed) (2933528)	Security Feature Bypass	Important	2626416 in [MS11-095](http://go.microsoft.com/fwlink/?linkid=232666)
[Windows XP Professional x64 Edition Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=32145946-646c-40bb-85a0-4bbb372deff1) (With Active Directory Application Mode installed) (2933528)	Security Feature Bypass	Important	2801109 in [MS13-032](http://go.microsoft.com/fwlink/?linkid=280660)
**Windows Server 2003**
[Windows Server 2003 Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=3dda2bc3-2c74-401a-a878-615acf7577ce) (With Active Directory installed) (2923392)	Security Feature Bypass	Important	None
[Windows Server 2003 Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=53163851-8f0b-4b00-a0a9-6237509775a4) (With Active Directory Application Mode installed) (2933528)	Security Feature Bypass	Important	2801109 in [MS13-032](http://go.microsoft.com/fwlink/?linkid=280660)
[Windows Server 2003 x64 Edition Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=8e2379ab-2862-48e6-91d8-f775597f3a53) (With Active Directory installed) (2923392)	Security Feature Bypass	Important	None
[Windows Server 2003 x64 Edition Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=28ac0c0e-4044-42ed-bc77-4a07828ee421) (With Active Directory Application Mode installed) (2933528)	Security Feature Bypass	Important	2801109 in [MS13-032](http://go.microsoft.com/fwlink/?linkid=280660)
[Windows Server 2003 with SP2 for Itanium-based Systems](https://www.microsoft.com/download/details.aspx?familyid=c079f55c-0046-4257-a45b-b6ac173c3e86) (With Active Directory installed) (2923392)	Security Feature Bypass	Important	None
**Windows Vista**
[Windows Vista Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=d5e192bd-2836-4197-91ef-092264acc6ee) (With Active Directory Lightweight Directory Service (AD LDS) installed) (2923392)	Security Feature Bypass	Important	2772930 in [MS13-032](http://go.microsoft.com/fwlink/?linkid=280660)
[Windows Vista x64 Edition Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=1197e041-2ba5-4f2d-bdf4-290521c700cf) (With Active Directory Lightweight Directory Service (AD LDS) installed) (2923392)	Security Feature Bypass	Important	2772930 in [MS13-032](http://go.microsoft.com/fwlink/?linkid=280660)
**Windows Server 2008**
[Windows Server 2008 for 32-bit Systems Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=50cfb145-6f71-4d7e-8598-4078c7b1ab30) (With Active Directory Domain Services (AD DS) or Active Directory Lightweight Directory Service (AD LDS) installed) (2923392)	Security Feature Bypass	Important	2772930 in [MS13-032](http://go.microsoft.com/fwlink/?linkid=280660)
[Windows Server 2008 for x64-based Systems Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=e55cd385-21da-4a13-b965-be75d8195768) (With Active Directory Domain Services (AD DS) or Active Directory Lightweight Directory Service (AD LDS) installed) (2923392)	Security Feature Bypass	Important	2772930 in [MS13-032](http://go.microsoft.com/fwlink/?linkid=280660)
**Windows Server 2008 R2**
[Windows Server 2008 R2 for x64-based Systems Service Pack 1](https://www.microsoft.com/download/details.aspx?familyid=04e3b3bd-e7e4-413b-893e-9324a00d2bd8) (With Active Directory Domain Services (AD DS) role installed) (2923392)	Security Feature Bypass	Important	None
**Windows Server 2012 and Windows Server 2012 R2**
[Windows Server 2012](https://www.microsoft.com/download/details.aspx?familyid=423a5216-7f79-4b52-9e08-ebb81d698d8b) (With Active Directory installed) (2923392)	Security Feature Bypass	Important	None
[Windows Server 2012 R2](https://www.microsoft.com/download/details.aspx?familyid=f2a11309-4764-4cc7-a415-88a0c447e0ed) (With Active Directory installed) (2923392)	Security Feature Bypass	Important	None
**Server Core installation option**
[Windows Server 2008 for 32-bit Systems Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=50cfb145-6f71-4d7e-8598-4078c7b1ab30) (Server Core installation) (With Active Directory Domain Services (AD DS) or Active Directory Lightweight Directory Service (AD LDS) installed) (2923392)	Security Feature Bypass	Important	2772930 in [MS13-032](http://go.microsoft.com/fwlink/?linkid=280660)
[Windows Server 2008 for x64-based Systems Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=e55cd385-21da-4a13-b965-be75d8195768) (Server Core installation) (With Active Directory Domain Services (AD DS) or Active Directory Lightweight Directory Service (AD LDS) installed) (2923392)	Security Feature Bypass	Important	2772930 in [MS13-032](http://go.microsoft.com/fwlink/?linkid=280660)
[Windows Server 2008 R2 for x64-based Systems Service Pack 1](https://www.microsoft.com/download/details.aspx?familyid=04e3b3bd-e7e4-413b-893e-9324a00d2bd8) (Server Core installation) (With Active Directory Domain Services (AD DS) role installed) (2923392)	Security Feature Bypass	Important	None
[Windows Server 2012](https://www.microsoft.com/download/details.aspx?familyid=423a5216-7f79-4b52-9e08-ebb81d698d8b) (Server Core installation) (With Active Directory installed) (2923392)	Security Feature Bypass	Important	None
[Windows Server 2012 R2](https://www.microsoft.com/download/details.aspx?familyid=f2a11309-4764-4cc7-a415-88a0c447e0ed) (Server Core installation) (With Active Directory installed) (2923392)	Security Feature Bypass	Important	None

 

Non-Affected Software

Operating System
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 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 RT
Windows RT 8.1

Update FAQ ---------- **I am running Windows XP Service Pack 3, and I do not have Active Directory Application Mode (ADAM) installed. Where is the update for my system?**  If you have Windows XP Service Pack 3 installed and you are not running ADAM, your system is not affected by this vulnerability and you will not be offered the update. **There are multiple update packages available for Window XP Professional x64 Edition, Windows Server 2003 Service Pack 2, and Windows Server 2003 x64 Edition. Do I need to install all the updates listed in the Affected Software table for this software?**  Yes, if you have ADAM installed, you need to install both update 2923392 and update 2933528. If you do not have ADAM installed, you only need to install update 2923392. **Do I need to install these security updates in a particular sequence?**  No. Multiple updates for one version of Window XP Professional x64 Edition, Windows Server 2003 Service Pack 2, and Windows Server 2003 x64 Edition software can be applied in any sequence. **I am running Windows Vista, Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, or Windows Server 2012 R2. Why am I not being offered the update?**  The update will only be offered to systems running one of these operating systems if the following is true: - On Windows Vista, if Active Directory Lightweight Directory Services (AD LDS) is installed - On Windows Server 2008, if Active Directory Domain Services (AD DS) or Active Directory Lightweight Directory Service (AD LDS) is installed - On Windows Server 2008 R2, if Active Directory Domain Services (AD DS) is installed - On Windows Server 2012 or Windows Server 2012 R2, If Active Directory is installed **I am using an older release of the software discussed in this security bulletin. What should I do?** The affected software listed in this bulletin has been tested to determine which releases are affected. Other releases are past their support life cycle. For more information about the product lifecycle, see the [Microsoft Support Lifecycle](http://go.microsoft.com/fwlink/?linkid=21742) website. It should be a priority for customers who have older releases of the software to migrate to supported releases to prevent potential exposure to vulnerabilities. To determine the support lifecycle for your software release, see [Select a Product for Lifecycle Information](http://go.microsoft.com/fwlink/?linkid=169555). For more information about service packs for these software releases, see [Service Pack Lifecycle Support Policy](http://go.microsoft.com/fwlink/?linkid=89213). Customers who require custom support for older software must contact their Microsoft account team representative, their Technical Account Manager, or the appropriate Microsoft partner representative for custom support options. Customers without an Alliance, Premier, or Authorized Contract can contact their local Microsoft sales office. For contact information, see the [Microsoft Worldwide Information](http://go.microsoft.com/fwlink/?linkid=33329) website, select the country in the Contact Information list, and then click Go to see a list of telephone numbers. When you call, ask to speak with the local Premier Support sales manager. For more information, see the [Microsoft Support Lifecycle Policy FAQ](http://go.microsoft.com/fwlink/?linkid=169557). Severity Ratings and Vulnerability Identifiers ---------------------------------------------- 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 [March bulletin summary](https://technet.microsoft.com/security/bulletin/ms14-mar). For more information, see [Microsoft Exploitability Index](http://technet.microsoft.com/security/cc998259).

Vulnerability Severity Rating and Maximum Security Impact by Affected Software
**Affected Software**	**SAMR Security Feature Bypass Vulnerability - CVE-2014-0317**	**Aggregate Severity Rating**
**Windows XP**
Windows XP Service Pack 3	**Important**  Security Feature Bypass	**Important**
Windows XP Professional x64 Edition Service Pack 2	**Important**  Security Feature Bypass	**Important**
**Windows Server 2003**
Windows Server 2003 Service Pack 2	**Important**  Security Feature Bypass	**Important**
Windows Server 2003 x64 Edition Service Pack 2	**Important**  Security Feature Bypass	**Important**
Windows Server 2003 with SP2 for Itanium-based Systems	**Important**  Security Feature Bypass	**Important**
**Windows Vista**
Windows Vista Service Pack 2	**Important**  Security Feature Bypass	**Important**
Windows Vista x64 Edition Service Pack 2	**Important**  Security Feature Bypass	**Important**
**Windows Server 2008**
Windows Server 2008 for 32-bit Systems Service Pack 2	**Important**  Security Feature Bypass	**Important**
Windows Server 2008 for x64-based Systems Service Pack 2	**Important**  Security Feature Bypass	**Important**
**Windows Server 2008 R2**
Windows Server 2008 R2 for x64-based Systems Service Pack 1	**Important**  Security Feature Bypass	**Important**
**Windows Server 2012 and Windows Server 2012 R2**
Windows Server 2012	**Important**  Security Feature Bypass	**Important**
Windows Server 2012 R2	**Important**  Security Feature Bypass	**Important**
**Server Core installation option**
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)	**Important**  Security Feature Bypass	**Important**
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)	**Important**  Security Feature Bypass	**Important**
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)	**Important**  Security Feature Bypass	**Important**
Windows Server 2012 (Server Core installation)	**Important**  Security Feature Bypass	**Important**
Windows Server 2012 R2 (Server Core installation)	**Important**  Security Feature Bypass	**Important**

SAMR Security Feature Bypass Vulnerability - CVE-2014-0317

A security feature bypass vulnerability exists when the Security Account Manager Remote (SAMR) protocol incorrectly validates user lockout state.

To view this vulnerability as a standard entry in the Common Vulnerabilities and Exposures list, see CVE-2014-0317.

Mitigating Factors

Microsoft has not identified any mitigating factors for this vulnerability.

Workarounds

Microsoft has not identified any workarounds for this vulnerability.

FAQ

What is the scope of the vulnerability?
This is a security feature bypass vulnerability.

What causes the vulnerability?
The vulnerability is caused when Windows incorrectly validates user lockout states.

What is SAMR?
The Security Account Manager Remote (SAMR) protocol (client-to-server) provides management functionality for an account store or directory containing users and groups. This protocol is useful for manipulating an account database consisting of users, groups, and other security principals.

What might an attacker use the vulnerability to do?
An attacker who successfully exploited this vulnerability could conduct brute force attacks against user passwords.

How could an attacker exploit the vulnerability?
To exploit this vulnerability, an attacker would need a username and have network connectivity to a domain controller.

What systems are primarily at risk from the vulnerability?
Servers with Active Directory installed, or servers and workstations that are running Active Directory Lightweight Directory Services or Active Directory Application Mode are at risk.

What does the update do?
The update addresses the vulnerability by correcting the manner in which Windows validates user lockout state.

When this security bulletin was issued, had this vulnerability been publicly disclosed?
No. Microsoft received information about this vulnerability through coordinated vulnerability disclosure.

When this security bulletin was issued, had Microsoft received any reports that this vulnerability was being exploited?
No. Microsoft had not received any information to indicate that this vulnerability had been publicly used to attack customers when this security bulletin was issued.

Detection and Deployment Tools and Guidance

Several resources are available to help administrators deploy security updates.

• Microsoft Baseline Security Analyzer (MBSA) lets administrators scan local and remote systems for missing security updates and common security misconfigurations.
• Windows Server Update Services (WSUS), Systems Management Server (SMS), and System Center Configuration Manager help administrators distribute security updates.
• The Update Compatibility Evaluator components included with Application Compatibility Toolkit aid in streamlining the testing and validation of Windows updates against installed applications.

For information about these and other tools that are available, see Security Tools for IT Pros.

Security Update Deployment

Windows XP (all editions)

Reference Table

The following table contains the security update information for this software.

Security update file names	For all supported 32-bit editions of Windows XP: WindowsXP-KB2933528-x86-ENU.exe
	For all supported x64-based editions of Windows XP Professional: WindowsServer2003.WindowsXP-KB2933528-x64-ENU.exe
Installation switches	See Microsoft Knowledge Base Article 262841
Update log file	KB2933528.log
Restart requirement	Yes, you must restart your system after you apply this security update.
Removal information	Use Add or Remove Programs item in Control Panel or the Spuninst.exe utility located in the %Windir%\$NTUninstallKB2933528$\Spuninst folder
File information	See Microsoft Knowledge Base Article 2933528
Registry key verification	For all supported 32-bit editions of Windows XP: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Windows XP\SP4\KB2933528\Filelist
	For all supported x64-based editions of Windows XP: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Windows XP Version 2003\SP3\KB2933528\Filelist

Note The update for supported versions of Windows XP Professional x64 Edition also applies to supported versions of Windows Server 2003 x64 Edition.

Windows Server 2003 (all editions)

Reference Table

The following table contains the security update information for this software.

Security update file names	For all supported 32-bit editions of Windows Server 2003: WindowsServer2003-KB2923392-x86-ENU.exe WindowsServer2003-KB2933528-x86-ENU.exe
	For all supported x64-based editions of Windows Server 2003: WindowsServer2003.WindowsXP-KB2923392-x64-ENU.exe WindowsServer2003.WindowsXP-KB2933528-x64-ENU.exe
	For all supported Itanium-based editions of Windows Server 2003: WindowsServer2003-KB2923392-ia64-ENU.exe
Installation switches	See Microsoft Knowledge Base Article 262841
Update log file	KB2923392.log KB2933528.log
Restart requirement	Yes, you must restart your system after you apply this security update.
Removal information	Use Add or Remove Programs item in Control Panel or the Spuninst.exe utility located in the %Windir%\$NTUninstallKB2923392$\Spuninst folder Use Add or Remove Programs item in Control Panel or the Spuninst.exe utility located in the %Windir%\$NTUninstallKB2933528$\Spuninst folder
File information	See Microsoft Knowledge Base Article 2923392 See Microsoft Knowledge Base Article 2933528
Registry key verification	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Windows Server 2003\SP3\KB2923392\Filelist HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Windows Server 2003\SP3\KB2933528\Filelist

Note The update for supported versions of Windows Server 2003 x64 Edition also applies to supported versions of Windows XP Professional x64 Edition.

Windows Vista (all editions)

Reference Table

The following table contains the security update information for this software.

Security update file names	For all supported 32-bit editions of Windows Vista: Windows6.0-KB2923392-x86.msu
	For all supported x64-based editions of Windows Vista: Windows6.0-KB2923392-x64.msu
Installation switches	See Microsoft Knowledge Base Article 934307
Restart requirement	Yes, you must restart your system after you apply this security update.
Removal information	WUSA.exe does not support uninstall of updates. To uninstall an update installed by WUSA, click Control Panel, and then click Security. Under Windows Update, click View installed updates and select from the list of updates.
File information	See Microsoft Knowledge Base Article 2923392
Registry key verification	Note A registry key does not exist to validate the presence of this update.

### Windows Server 2008 (all editions) **Reference Table** The following table contains the security update information for this software.

Security update file names	For all supported 32-bit editions of Windows Server 2008: Windows6.0-KB2923392-x86.msu
	For all supported x64-based editions of Windows Server 2008: Windows6.0-KB2923392-x64.msu
Installation switches	See Microsoft Knowledge Base Article 934307
Restart requirement	Yes, you must restart your system after you apply this security update.
Removal information	WUSA.exe does not support uninstall of updates. To uninstall an update installed by WUSA, click Control Panel, and then click Security. Under Windows Update, click View installed updates and select from the list of updates.
File information	See Microsoft Knowledge Base Article 2923392
Registry key verification	Note A registry key does not exist to validate the presence of this update.

### Windows Server 2008 R2 (all editions) **Reference Table** The following table contains the security update information for this software.

Security update file name	For all supported x64-based editions of Windows Server 2008 R2: Windows6.1-KB2923392-x64.msu
Installation switches	See Microsoft Knowledge Base Article 934307
Restart requirement	Yes, you must restart your system after you apply this security update.
Removal information	To uninstall an update installed by WUSA, use the /Uninstall setup switch or click Control Panel, click System and Security, and then under Windows Update, click View installed updates and select from the list of updates.
File information	See Microsoft Knowledge Base Article 2923392
Registry key verification	Note A registry key does not exist to validate the presence of this update.

### Windows Server 2012 and Windows Server 2012 R2 (all editions) **Reference Table** The following table contains the security update information for this software.

Security update file name	For all supported editions of Windows Server 2012: Windows8-RT-KB2923392-x64.msu
	For all supported editions of Windows Server 2012 R2: Windows8.1-KB2923392-x64.msu
Installation switches	See Microsoft Knowledge Base Article 934307
Restart requirement	Yes, you must restart your system after you apply this security update.
Removal information	To uninstall an update installed by WUSA, use the /Uninstall setup switch or click Control Panel, click System and Security, click Windows Update, and then under See also, click Installed updates and select from the list of updates.
File information	See Microsoft Knowledge Base Article 2923392
Registry key verification	Note A registry key does not exist to validate the presence of this update.

Acknowledgments --------------- Microsoft [thanks](http://go.microsoft.com/fwlink/?linkid=21127) the following for working with us to help protect customers: - Andrew Bartlett of the Samba Team and Catalyst IT for reporting the SAMR Security Feature Bypass Vulnerability (CVE-2014-0317) - [Muhammad Faisal Naqvi](http://ae.linkedin.com/in/mfaisalnaqvi) of Pakistan for reporting the SAMR Security Feature Bypass Vulnerability (CVE-2014-0317) Other Information ----------------- ### 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](http://go.microsoft.com/fwlink/?linkid=215201). ### Support **How to obtain help and support for this security update** - Help installing updates: [Support for Microsoft Update](http://support.microsoft.com/ph/6527) - Security solutions for IT professionals: [TechNet Security Troubleshooting and Support](http://technet.microsoft.com/security/bb980617.aspx) - Help protect your computer that is running Windows from viruses and malware: [Virus Solution and Security Center](http://support.microsoft.com/contactus/cu_sc_virsec_master) - Local support according to your country: [International Support](http://support.microsoft.com/common/international.aspx) ### 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 (March 11, 2014): Bulletin published. - V1.1 (March 20, 2014): Clarified in the vulnerability FAQ what systems are primarily at risk for CVE-2014-0317. Added Update FAQ to explain why users running Windows Vista, Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, or Windows Server 2012 R2 might not be offered the update. These are informational changes only. - V1.2 (September 10, 2014): Revised Update FAQ and entries in the Operating System column of the Affected Software table to further clarify what version of Active Directory must be installed on a system to be offered the update. These are informational changes only. *Page generated 2014-09-10 16:45Z-07:00.*