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Security Bulletin

Microsoft Security Bulletin MS13-018 - Important

Vulnerability in TCP/IP Could Allow Denial of Service (2790655)

Published: February 12, 2013 | Updated: February 12, 2013

Version: 1.1

General Information

Executive Summary

This security update resolves a privately reported vulnerability in Microsoft Windows. The vulnerability could allow denial of service if an unauthenticated attacker sends a specially crafted connection termination packet to the server.

This security update is rated Important for all supported editions of Windows Server 2008, Windows Server 2008 R2, and Windows Server 2012; it is rated Moderate for all supported editions of Windows Vista, Windows 7, Windows 8, and Windows RT. For more information, see the subsection, Affected and Non-Affected Software, in this section.

The security update addresses the vulnerability by correcting how the Windows TCP/IP stack handles connection termination sequences. 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.

Known Issues. Microsoft Knowledge Base Article 2790655 documents the currently known issues that customers may experience when installing this security update. The article also documents recommended solutions for these issues.

Affected and Non-Affected Software

The following software have 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 Vista
[Windows Vista Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=80b766e7-3b7f-4d04-9a80-71864a13df8c) (KB2790655) Denial of Service Moderate KB2688338 in [MS12-032](http://go.microsoft.com/fwlink/?linkid=246964)
[Windows Vista x64 Edition Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=92bad797-5b66-422c-a096-8070d02bb8b2) (KB2790655) Denial of Service Moderate KB2688338 in [MS12-032](http://go.microsoft.com/fwlink/?linkid=246964)
Windows Server 2008
[Windows Server 2008 for 32-bit Systems Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=c24aa6f3-82a5-4b1f-adc8-4aece948161c) (KB2790655) Denial of Service Important KB2688338 in [MS12-032](http://go.microsoft.com/fwlink/?linkid=246964)
[Windows Server 2008 for x64-based Systems Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=2738fbe4-2163-4e77-82e6-208a7a08a70c) (KB2790655) Denial of Service Important KB2688338 in [MS12-032](http://go.microsoft.com/fwlink/?linkid=246964)
[Windows Server 2008 for Itanium-based Systems Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=c269c175-f47c-456a-9360-f38bbdfd7ed0) (KB2790655) Denial of Service Important KB2688338 in [MS12-032](http://go.microsoft.com/fwlink/?linkid=246964)
Windows 7
[Windows 7 for 32-bit Systems](https://www.microsoft.com/download/details.aspx?familyid=cb4270c4-cec5-49e0-a56b-97539d6352a0) (KB2790655) Denial of Service Moderate KB2688338 in [MS12-032](http://go.microsoft.com/fwlink/?linkid=246964)
[Windows 7 for 32-bit Systems Service Pack 1](https://www.microsoft.com/download/details.aspx?familyid=cb4270c4-cec5-49e0-a56b-97539d6352a0) (KB2790655) Denial of Service Moderate KB2688338 in [MS12-032](http://go.microsoft.com/fwlink/?linkid=246964)
[Windows 7 for x64-based Systems](https://www.microsoft.com/download/details.aspx?familyid=5d93cb19-7854-4b49-9743-8d6a11be2dd6) (KB2790655) Denial of Service Moderate KB2688338 in [MS12-032](http://go.microsoft.com/fwlink/?linkid=246964)
[Windows 7 for x64-based Systems Service Pack 1](https://www.microsoft.com/download/details.aspx?familyid=5d93cb19-7854-4b49-9743-8d6a11be2dd6) (KB2790655) Denial of Service Moderate KB2688338 in [MS12-032](http://go.microsoft.com/fwlink/?linkid=246964)
Windows Server 2008 R2
[Windows Server 2008 R2 for x64-based Systems](https://www.microsoft.com/download/details.aspx?familyid=01284b28-043a-4e27-b363-c1e641164a01) (KB2790655) Denial of Service Important KB2688338 in [MS12-032](http://go.microsoft.com/fwlink/?linkid=246964)
[Windows Server 2008 R2 for x64-based Systems Service Pack 1](https://www.microsoft.com/download/details.aspx?familyid=01284b28-043a-4e27-b363-c1e641164a01) (KB2790655) Denial of Service Important KB2688338 in [MS12-032](http://go.microsoft.com/fwlink/?linkid=246964)
[Windows Server 2008 R2 for Itanium-based Systems](https://www.microsoft.com/download/details.aspx?familyid=e1be5dea-dd13-42b5-a37f-4bcd828cc65f) (KB2790655) Denial of Service Important KB2688338 in [MS12-032](http://go.microsoft.com/fwlink/?linkid=246964)
[Windows Server 2008 R2 for Itanium-based Systems Service Pack 1](https://www.microsoft.com/download/details.aspx?familyid=e1be5dea-dd13-42b5-a37f-4bcd828cc65f) (KB2790655) Denial of Service Important KB2688338 in [MS12-032](http://go.microsoft.com/fwlink/?linkid=246964)
Windows 8
[Windows 8 for 32-bit Systems](https://www.microsoft.com/download/details.aspx?familyid=e7739ba6-9c62-4180-a095-47fdb6c741e9) (KB2790655) Denial of Service Moderate None
[Windows 8 for 64-bit Systems](https://www.microsoft.com/download/details.aspx?familyid=dd2042b8-c784-4dfc-8fca-61905693cda5) (KB2790655) Denial of Service Moderate None
Windows Server 2012
[Windows Server 2012](https://www.microsoft.com/download/details.aspx?familyid=f74a104d-4749-4dd5-b144-2e4ce9c284a2) (KB2790655) Denial of Service Important None
Windows RT
Windows RT[1] (KB2790655) Denial of Service Moderate None
Server Core installation option
[Windows Server 2008 for 32-bit Systems Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=c24aa6f3-82a5-4b1f-adc8-4aece948161c) (Server Core installation) (KB2790655) Denial of Service Important KB2688338 in [MS12-032](http://go.microsoft.com/fwlink/?linkid=246964)
[Windows Server 2008 for x64-based Systems Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=2738fbe4-2163-4e77-82e6-208a7a08a70c) (Server Core installation) (KB2790655) Denial of Service Important KB2688338 in [MS12-032](http://go.microsoft.com/fwlink/?linkid=246964)
[Windows Server 2008 R2 for x64-based Systems](https://www.microsoft.com/download/details.aspx?familyid=01284b28-043a-4e27-b363-c1e641164a01) (Server Core installation) (KB2790655) Denial of Service Important KB2688338 in [MS12-032](http://go.microsoft.com/fwlink/?linkid=246964)
[Windows Server 2008 R2 for x64-based Systems Service Pack 1](https://www.microsoft.com/download/details.aspx?familyid=01284b28-043a-4e27-b363-c1e641164a01) (Server Core installation) (KB2790655) Denial of Service Important KB2688338 in [MS12-032](http://go.microsoft.com/fwlink/?linkid=246964)
[Windows Server 2012](https://www.microsoft.com/download/details.aspx?familyid=f74a104d-4749-4dd5-b144-2e4ce9c284a2) (Server Core installation) (KB2790655) Denial of Service Important None
[1]Windows RT security updates are provided via [Windows Update](http://go.microsoft.com/fwlink/?linkid=21130).

** **

Non-Affected Software

Operating System
Windows XP Service Pack 3
Windows XP Professional x64 Edition Service Pack 2
Windows Server 2003 Service Pack 2
Windows Server 2003 x64 Edition Service Pack 2
Windows Server 2003 with SP2 for Itanium-based Systems

Where are the file information details?
Refer to the reference tables in the Security Update Deployment section for the location of the file information details.

Where are the hashes of the security updates?
The SHA1 and SHA2 hashes of the security updates can be used to verify the authenticity of downloaded security update packages. For the hash information pertaining to this update, see Microsoft Knowledge Base Article 2790655.

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 have 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 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. For more information about service packs for these software releases, see Service Pack Lifecycle Support Policy.

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 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.

Vulnerability Information

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 February bulletin summary. For more information, see Microsoft Exploitability Index.

Vulnerability Severity Rating and Maximum Security Impact by Affected Software
Affected Software TCP FIN WAIT Vulnerability - CVE-2013-0075 Aggregate Severity Rating
Windows Vista
Windows Vista Service Pack 2 **Moderate**  Denial of Service **Moderate**
Windows Vista x64 Edition Service Pack 2 **Moderate**  Denial of Service **Moderate**
Windows Server 2008
Windows Server 2008 for 32-bit Systems Service Pack 2 **Important**  Denial of Service **Important**
Windows Server 2008 for x64-based Systems Service Pack 2 **Important**  Denial of Service **Important**
Windows Server 2008 for Itanium-based Systems Service Pack 2 **Important**  Denial of Service **Important**
Windows 7
Windows 7 for 32-bit Systems **Moderate**  Denial of Service **Moderate**
Windows 7 for 32-bit Systems Service Pack 1 **Moderate**  Denial of Service **Moderate**
Windows 7 for x64-based Systems **Moderate**  Denial of Service **Moderate**
Windows 7 for x64-based Systems Service Pack 1 **Moderate**  Denial of Service **Moderate**
Windows Server 2008 R2
Windows Server 2008 R2 for x64-based Systems **Important**  Denial of Service **Important**
Windows Server 2008 R2 for x64-based Systems Service Pack 1 **Important**  Denial of Service **Important**
Windows Server 2008 R2 for Itanium-based Systems **Important**  Denial of Service **Important**
Windows Server 2008 R2 for Itanium-based Systems Service Pack 1 **Important**  Denial of Service **Important**
Windows 8
Windows 8 for 32-bit Systems **Moderate**  Denial of Service **Moderate**
Windows 8 for 64-bit Systems **Moderate**  Denial of Service **Moderate**
Windows Server 2012
Windows Server 2012 **Important**  Denial of Service **Important**
Windows RT
Windows RT[1] **Moderate**  Denial of Service **Moderate**
Server Core installation option
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) **Important**  Denial of Service **Important**
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) **Important**  Denial of Service **Important**
Windows Server 2008 R2 for x64-based Systems (Server Core installation) **Important**  Denial of Service **Important**
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) **Important**  Denial of Service **Important**
Windows Server 2012 (Server Core installation) **Important**  Denial of Service **Important**

TCP FIN WAIT Vulnerability - CVE-2013-0075

A denial of service vulnerability exists in the Windows TCP/IP stack that could cause the target system to stop responding and automatically restart. The vulnerability is caused when the TCP/IP stack improperly handles a connection termination sequence.

To view this vulnerability as a standard entry in the Common Vulnerabilities and Exposures list, see CVE-2013-0075.

Mitigating Factors for TCP FIN WAIT Vulnerability - CVE-2013-0075

Microsoft has not identified any mitigating factors for this vulnerability

Workarounds for TCP FIN WAIT Vulnerability - CVE-2013-0075

Microsoft has not identified any workarounds for this vulnerability.

FAQ for TCP FIN WAIT Vulnerability - CVE-2013-0075

What is the scope of the vulnerability?
This is a denial of service vulnerability.

What causes the vulnerability?
The vulnerability is caused when the Windows TCP/IP stack improperly handles a connection termination sequence.

What might an attacker use the vulnerability to do?
An attacker who successfully exploited this vulnerability could cause the target system to stop responding and automatically restart.

How could an attacker exploit the vulnerability?
An unauthenticated attacker could exploit this vulnerability by sending a specially crafted connection termination packet to the server.

What systems are primarily at risk from the vulnerability?
Servers are primarily at risk from the vulnerability.

What does the update do?
The update addresses the vulnerability by correcting how the Windows TCP/IP stack handles connection termination sequences.

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 originally issued.

Update Information

Detection and Deployment Tools and Guidance

Security Central

Manage the software and security updates you need to deploy to the servers, desktop, and mobile systems in your organization. For more information see the TechNet Update Management Center. The Microsoft TechNet Security website provides additional information about security in Microsoft products.

Security updates are available from Microsoft Update and Windows Update. Security updates are also available from the Microsoft Download Center. You can find them most easily by doing a keyword search for "security update."

Finally, security updates can be downloaded from the Microsoft Update Catalog. The Microsoft Update Catalog provides a searchable catalog of content made available through Windows Update and Microsoft Update, including security updates, drivers and service packs. By searching using the security bulletin number (such as, "MS12-001"), you can add all the applicable updates to your basket (including different languages for an update), and download to the folder of your choosing. For more information about the Microsoft Update Catalog, see the Microsoft Update Catalog FAQ.

Detection and Deployment Guidance

Microsoft provides detection and deployment guidance for security updates. This guidance contains recommendations and information that can help IT professionals understand how to use various tools for detection and deployment of security updates. For more information, see Microsoft Knowledge Base Article 961747.

Microsoft Baseline Security Analyzer

Microsoft Baseline Security Analyzer (MBSA) lets administrators scan local and remote systems for missing security updates as well as common security misconfigurations. For more information, see Microsoft Baseline Security Analyzer.

The following table provides the MBSA detection summary for this security update.

Software MBSA
Windows Vista Service Pack 2 Yes
Windows Vista x64 Edition Service Pack 2 Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 Yes
Windows Server 2008 for x64-based Systems Service Pack 2 Yes
Windows Server 2008 for Itanium-based Systems Service Pack 2 Yes
Windows 7 for 32-bit Systems and Windows 7 for 32-bit Systems Service Pack 1 Yes
Windows 7 for x64-based Systems and Windows 7 for x64-based Systems Service Pack 1 Yes
Windows Server 2008 R2 for x64-based Systems and Windows Server 2008 R2 for x64-based Systems Service Pack 1 Yes
Windows Server 2008 R2 for Itanium-based Systems and Windows Server 2008 R2 for Itanium-based Systems Service Pack 1 Yes
Windows 8 for 32-bit Systems No
Windows 8 for 64-bit Systems No
Windows Server 2012 No
Windows RT No

Note For customers using legacy software not supported by the latest release of MBSA, Microsoft Update, and Windows Server Update Services, please see Microsoft Baseline Security Analyzer and reference the Legacy Product Support section on how to create comprehensive security update detection with legacy tools.

Windows Server Update Services

Windows Server Update Services (WSUS) enables information technology administrators to deploy the latest Microsoft product updates to computers that are running the Windows operating system. For more information about how to deploy security updates using Windows Server Update Services, see the TechNet article, Windows Server Update Services.

Systems Management Server

The following table provides the SMS detection and deployment summary for this security update.

Software SMS 2003 with ITMU System Center Configuration Manager (All Supported Versions)
Windows Vista Service Pack 2 Yes Yes
Windows Vista x64 Edition Service Pack 2 Yes Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 Yes Yes
Windows Server 2008 for x64-based Systems Service Pack 2 Yes Yes
Windows Server 2008 for Itanium-based Systems Service Pack 2 Yes Yes
Windows 7 for 32-bit Systems and Windows 7 for 32-bit Systems Service Pack 1 Yes Yes
Windows 7 for x64-based Systems and Windows 7 for x64-based Systems Service Pack 1 Yes Yes
Windows Server 2008 R2 for x64-based Systems and Windows Server 2008 R2 for x64-based Systems Service Pack 1 Yes Yes
Windows Server 2008 R2 for Itanium-based Systems and Windows Server 2008 R2 for Itanium-based Systems Service Pack 1 Yes Yes
Windows 8 for 32-bit Systems Yes Yes
Windows 8 for 64-bit Systems Yes Yes
Windows Server 2012 Yes Yes
Windows RT No No

Note Microsoft discontinued support for SMS 2.0 on April 12, 2011. For SMS 2003, Microsoft also discontinued support for the Security Update Inventory Tool (SUIT) on April 12, 2011. Customers are encouraged to upgrade to System Center Configuration Manager. For customers remaining on SMS 2003 Service Pack 3, the Inventory Tool for Microsoft Updates (ITMU) is also an option.

For SMS 2003, the SMS 2003 Inventory Tool for Microsoft Updates (ITMU) can be used by SMS to detect security updates that are offered by Microsoft Update and that are supported by Windows Server Update Services. For more information about the SMS 2003 ITMU, see SMS 2003 Inventory Tool for Microsoft Updates. For more information about SMS scanning tools, see SMS 2003 Software Update Scanning Tools. See also Downloads for Systems Management Server 2003.

System Center Configuration Manager uses WSUS 3.0 for detection of updates. For more information, see System Center.

For more detailed information, see Microsoft Knowledge Base Article 910723: Summary list of monthly detection and deployment guidance articles.

Update Compatibility Evaluator and Application Compatibility Toolkit

Updates often write to the same files and registry settings required for your applications to run. This can trigger incompatibilities and increase the time it takes to deploy security updates. You can streamline testing and validating Windows updates against installed applications with the Update Compatibility Evaluator components included with Application Compatibility Toolkit.

The Application Compatibility Toolkit (ACT) contains the necessary tools and documentation to evaluate and mitigate application compatibility issues before deploying Windows Vista, a Windows Update, a Microsoft Security Update, or a new version of Windows Internet Explorer in your environment.

Security Update Deployment

Affected Software

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

Windows Vista (all editions)

Reference Table

The following table contains the security update information for this software. You can find additional information in the subsection, Deployment Information, in this section.

Inclusion in Future Service Packs The update for this issue will be included in a future service pack or update rollup
Deployment  
Installing without user intervention For all supported 32-bit editions of Windows Vista:
Windows6.0-KB2790655-x86.msu /quiet
For all supported x64-based editions of Windows Vista:
Windows6.0-KB2790655-x64.msu /quiet
Installing without restarting For all supported 32-bit editions of Windows Vista:
Windows6.0-KB2790655-x86.msu /quiet /norestart
For all supported x64-based editions of Windows Vista:
Windows6.0-KB2790655-x64.msu /quiet /norestart
Further information See the subsection, Detection and Deployment Tools and Guidance
Restart Requirement  
Restart required? Yes, you must restart your system after you apply this security update.
HotPatching Not applicable.
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 2790655
Registry Key Verification Note A registry key does not exist to validate the presence of this update.
#### Deployment Information **Installing the Update** When you install this security update, the installer checks whether one or more of the files that are being updated on your system have previously been updated by a Microsoft hotfix. For more information about the terminology that appears in this bulletin, such as *hotfix*, see [Microsoft Knowledge Base Article 824684](http://support.microsoft.com/kb/824684). This security update supports the following setup switches. | Switch | Description | |-----------------------|--------------------------------------------------------------------------------------------------------------------------------------------| | **/?, /h,** **/help** | Displays help on supported switches. | | **/quiet** | Suppresses the display of status or error messages. | | **/norestart** | When combined with **/quiet**, the system will not be restarted after installation even if a restart is required to complete installation. | **Note** For more information about the wusa.exe installer, see [Microsoft Knowledge Base Article 934307](http://support.microsoft.com/kb/934307). **Verifying That the Update Has Been Applied** - **Microsoft Baseline Security Analyzer** To verify that a security update has been applied to an affected system, you may be able to use the Microsoft Baseline Security Analyzer (MBSA) tool. See the section, **Detection and Deployment Tools and Guidance**, earlier in this bulletin for more information. - **File Version Verification** Because there are several editions of Microsoft Windows, the following steps may be different on your system. If they are, see your product documentation to complete these steps. 1. Click **Start** and then enter an update file name in the **Start Search** box. 2. When the file appears under **Programs**, right-click the file name and click **Properties**. 3. On the **General** tab, compare the file size with the file information tables provided in the bulletin KB article. **Note** Depending on the edition of the operating system, or the programs that are installed on your system, some files that are listed in the file information table may not be installed. 4. You can also click the **Details** tab and compare information, such as file version and date modified, with the file information tables provided in the bulletin KB article. **Note** Attributes other than the file version may change during installation. Comparing other file attributes to the information in the file information table is not a supported method of verifying that the update has been applied. Also, in certain cases, files may be renamed during installation. If the file or version information is not present, use one of the other available methods to verify update installation. 5. Finally, you can also click the **Previous Versions** tab and compare file information for the previous version of the file with the file information for the new, or updated, version of the file. #### Windows Server 2008 (all editions) **Reference Table** The following table contains the security update information for this software. You can find additional information in the subsection, **Deployment Information**, in this section.

Inclusion in Future Service Packs The update for this issue will be included in a future service pack or update rollup
Deployment  
Installing without user intervention For all supported 32-bit editions of Windows Server 2008:
Windows6.0-KB2790655-x86.msu /quiet
For all supported x64-based editions of Windows Server 2008:
Windows6.0-KB2790655-x64.msu /quiet
For all supported Itanium-based editions of Windows Server 2008:
Windows6.0-KB2790655-ia64.msu /quiet
Installing without restarting For all supported 32-bit editions of Windows Server 2008:
Windows6.0-KB2790655-x86.msu /quiet /norestart
For all supported x64-based editions of Windows Server 2008:
Windows6.0-KB2790655-x64.msu /quiet /norestart
For all supported Itanium-based editions of Windows Server 2008:
Windows6.0-KB2790655-ia64.msu /quiet /norestart
Further information See the subsection, Detection and Deployment Tools and Guidance
Restart Requirement  
Restart required? Yes, you must restart your system after you apply this security update.
HotPatching Not applicable.
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 2790655
Registry Key Verification Note A registry key does not exist to validate the presence of this update.
#### Deployment Information **Installing the Update** When you install this security update, the installer checks whether one or more of the files that are being updated on your system have previously been updated by a Microsoft hotfix. For more information about the terminology that appears in this bulletin, such as *hotfix*, see [Microsoft Knowledge Base Article 824684](http://support.microsoft.com/kb/824684). This security update supports the following setup switches. | Switch | Description | |-----------------------|--------------------------------------------------------------------------------------------------------------------------------------------| | **/?, /h,** **/help** | Displays help on supported switches. | | **/quiet** | Suppresses the display of status or error messages. | | **/norestart** | When combined with **/quiet**, the system will not be restarted after installation even if a restart is required to complete installation. | **Note** For more information about the wusa.exe installer, see [Microsoft Knowledge Base Article 934307](http://support.microsoft.com/kb/934307). **Verifying That the Update Has Been Applied** - **Microsoft Baseline Security Analyzer** To verify that a security update has been applied to an affected system, you may be able to use the Microsoft Baseline Security Analyzer (MBSA) tool. See the section, **Detection and Deployment Tools and Guidance**, earlier in this bulletin for more information. - **File Version Verification** Because there are several editions of Microsoft Windows, the following steps may be different on your system. If they are, see your product documentation to complete these steps. 1. Click **Start** and then enter an update file name in the **Start Search** box. 2. When the file appears under **Programs**, right-click the file name and click **Properties**. 3. On the **General** tab, compare the file size with the file information tables provided in the bulletin KB article. **Note** Depending on the edition of the operating system, or the programs that are installed on your system, some files that are listed in the file information table may not be installed. 4. You can also click the **Details** tab and compare information, such as file version and date modified, with the file information tables provided in the bulletin KB article. **Note** Attributes other than the file version may change during installation. Comparing other file attributes to the information in the file information table is not a supported method of verifying that the update has been applied. Also, in certain cases, files may be renamed during installation. If the file or version information is not present, use one of the other available methods to verify update installation. 5. Finally, you can also click the **Previous Versions** tab and compare file information for the previous version of the file with the file information for the new, or updated, version of the file. #### Windows 7 (all editions) **Reference Table** The following table contains the security update information for this software. You can find additional information in the subsection, **Deployment Information**, in this section.

Inclusion in Future Service Packs The update for this issue will be included in a future service pack or update rollup
Deployment  
Installing without user intervention For all supported 32-bit editions of Windows 7:
Windows6.1-KB2790655-x86.msu /quiet
For all supported x64-based editions of Windows 7:
Windows6.1-KB2790655-x64.msu /quiet
Installing without restarting For all supported 32-bit editions of Windows 7:
Windows6.1-KB2790655-x86.msu /quiet /norestart
For all supported x64-based editions of Windows 7:
Windows6.1-KB2790655-x64.msu /quiet /norestart
Further information See the subsection, Detection and Deployment Tools and Guidance
Restart Requirement  
Restart required? Yes, you must restart your system after you apply this security update.
HotPatching Not applicable.
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 2790655
Registry Key Verification Note A registry key does not exist to validate the presence of this update.
#### Deployment Information **Installing the Update** When you install this security update, the installer checks whether one or more of the files that are being updated on your system have previously been updated by a Microsoft hotfix. For more information about the terminology that appears in this bulletin, such as *hotfix*, see [Microsoft Knowledge Base Article 824684](http://support.microsoft.com/kb/824684). This security update supports the following setup switches. | Switch | Description | |--------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------| | **/?, /h,** **/help** | Displays help on supported switches. | | **/quiet** | Suppresses the display of status or error messages. | | **/norestart** | When combined with **/quiet**, the system will not be restarted after installation even if a restart is required to complete installation. | | **/warnrestart:<seconds>** | When combined with **/quiet**, the installer will warn the user before initiating restart. | | **/promptrestart** | When combined with **/quiet**, the installer will prompt before initiating restart. | | **/forcerestart** | When combined with **/quiet**, the installer will forcefully close applications and initiate restart. | | **/log:<file name>** | Enables logging to specified file. | | **/extract:<destination>** | Extracts the package contents to the destination folder. | | **/uninstall /kb:<KB Number>** | Uninstalls the security update. | **Note** For more information about the wusa.exe installer, see "Windows Update Stand-alone Installer" in the TechNet article, [Miscellaneous Changes in Windows 7](http://technet.microsoft.com/library/dd871148.aspx). **Verifying That** **the Update Has Been Applied** - **Microsoft Baseline Security Analyzer** To verify that a security update has been applied to an affected system, you may be able to use the Microsoft Baseline Security Analyzer (MBSA) tool. See the section, **Detection and Deployment Tools and Guidance**, earlier in this bulletin for more information. - **File Version Verification** Because there are several editions of Microsoft Windows, the following steps may be different on your system. If they are, see your product documentation to complete these steps. 1. Click **Start** and then enter an update file name in the **Search** box. 2. When the file appears under **Programs**, right-click the file name and click **Properties**. 3. On the **General** tab, compare the file size with the file information tables provided in the bulletin KB article. **Note** Depending on the edition of the operating system, or the programs that are installed on your system, some files that are listed in the file information table may not be installed. 4. You can also click the **Details** tab and compare information, such as file version and date modified, with the file information tables provided in the bulletin KB article. **Note** Attributes other than the file version may change during installation. Comparing other file attributes to the information in the file information table is not a supported method of verifying that the update has been applied. Also, in certain cases, files may be renamed during installation. If the file or version information is not present, use one of the other available methods to verify update installation. 5. Finally, you can also click the **Previous Versions** tab and compare file information for the previous version of the file with the file information for the new, or updated, version of the file. #### Windows Server 2008 R2 (all editions) **Reference Table** The following table contains the security update information for this software. You can find additional information in the subsection, **Deployment Information**, in this section.

Inclusion in Future Service Packs The update for this issue will be included in a future service pack or update rollup
Deployment  
Installing without user intervention For all supported x64-based editions of Windows Server 2008 R2:
Windows6.1-KB2790655-x64.msu /quiet
For all supported Itanium-based editions of Windows Server 2008 R2:
Windows6.1-KB2790655-ia64.msu /quiet
Installing without restarting For all supported x64-based editions of Windows Server 2008 R2:
Windows6.1-KB2790655-x64.msu /quiet /norestart
For all supported Itanium-based editions of Windows Server 2008 R2:
Windows6.1-KB2790655-ia64.msu /quiet /norestart
Further information See the subsection, Detection and Deployment Tools and Guidance
Restart Requirement  
Restart required? Yes, you must restart your system after you apply this security update.
HotPatching Not applicable.
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 2790655
Registry Key Verification Note A registry key does not exist to validate the presence of this update.
#### Deployment Information **Installing the Update** When you install this security update, the installer checks whether one or more of the files that are being updated on your system have previously been updated by a Microsoft hotfix. For more information about the terminology that appears in this bulletin, such as *hotfix*, see [Microsoft Knowledge Base Article 824684](http://support.microsoft.com/kb/824684). This security update supports the following setup switches. | Switch | Description | |--------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------| | **/?, /h,** **/help** | Displays help on supported switches. | | **/quiet** | Suppresses the display of status or error messages. | | **/norestart** | When combined with **/quiet**, the system will not be restarted after installation even if a restart is required to complete installation. | | **/warnrestart:<seconds>** | When combined with **/quiet**, the installer will warn the user before initiating restart. | | **/promptrestart** | When combined with **/quiet**, the installer will prompt before initiating restart. | | **/forcerestart** | When combined with **/quiet**, the installer will forcefully close applications and initiate restart. | | **/log:<file name>** | Enables logging to specified file. | | **/extract:<destination>** | Extracts the package contents to the destination folder. | | **/uninstall /kb:<KB Number>** | Uninstalls the security update. | **Note** For more information about the wusa.exe installer, see "Windows Update Stand-alone Installer" in the TechNet article, [Miscellaneous Changes in Windows 7](http://technet.microsoft.com/library/dd871148.aspx). **Verifying That the Update Has Been Applied** - **Microsoft Baseline Security Analyzer** To verify that a security update has been applied to an affected system, you may be able to use the Microsoft Baseline Security Analyzer (MBSA) tool. See the section, **Detection and Deployment Tools and Guidance**, earlier in this bulletin for more information. - **File Version Verification** Because there are several editions of Microsoft Windows, the following steps may be different on your system. If they are, see your product documentation to complete these steps. 1. Click **Start** and then enter an update file name in the **Start Search** box. 2. When the file appears under **Programs**, right-click the file name and click **Properties**. 3. On the **General** tab, compare the file size with the file information tables provided in the bulletin KB article. **Note** Depending on the edition of the operating system, or the programs that are installed on your system, some files that are listed in the file information table may not be installed. 4. You can also click the **Details** tab and compare information, such as file version and date modified, with the file information tables provided in the bulletin KB article. **Note** Attributes other than the file version may change during installation. Comparing other file attributes to the information in the file information table is not a supported method of verifying that the update has been applied. Also, in certain cases, files may be renamed during installation. If the file or version information is not present, use one of the other available methods to verify update installation. 5. Finally, you can also click the **Previous Versions** tab and compare file information for the previous version of the file with the file information for the new, or updated, version of the file. #### Windows 8 (all editions) **Reference Table** The following table contains the security update information for this software. You can find additional information in the subsection, **Deployment Information**, in this section.

Inclusion in Future Service Packs The update for this issue will be included in a future service pack or update rollup
Deployment  
Installing without user intervention For all supported 32-bit editions of Windows 8:
Windows8-RT-KB2790655-x86.msu /quiet
For all supported 64-bit editions of Windows 8:
Windows8-RT-KB2790655-x64.msu /quiet
Installing without restarting For all supported 32-bit editions of Windows 8:
Windows8-RT-KB2790655-x86.msu /quiet /norestart
For all supported 64-bit editions of Windows 8:
Windows8-RT-KB2790655-x64.msu /quiet /norestart
Further information See the subsection, Detection and Deployment Tools and Guidance
Restart Requirement  
Restart required? Yes, you must restart your system after you apply this security update.
HotPatching Not applicable.
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 click Installed updates and select from the list of updates.
File Information See Microsoft Knowledge Base Article 2790655
Registry Key Verification Note A registry key does not exist to validate the presence of this update.
#### Deployment Information **Installing the Update** When you install this security update, the installer checks whether one or more of the files that are being updated on your system have previously been updated by a Microsoft hotfix. For more information about the terminology that appears in this bulletin, such as *hotfix*, see [Microsoft Knowledge Base Article 824684](http://support.microsoft.com/kb/824684). This security update supports the following setup switches. | Switch | Description | |--------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------| | **/?, /h,** **/help** | Displays help on supported switches. | | **/quiet** | Suppresses the display of status or error messages. | | **/norestart** | When combined with **/quiet**, the system will not be restarted after installation even if a restart is required to complete installation. | | **/warnrestart:<seconds>** | When combined with **/quiet**, the installer will warn the user before initiating restart. | | **/promptrestart** | When combined with **/quiet**, the installer will prompt before initiating restart. | | **/forcerestart** | When combined with **/quiet**, the installer will forcefully close applications and initiate restart. | | **/log:<file name>** | Enables logging to specified file. | | **/extract:<destination>** | Extracts the package contents to the destination folder. | | **/uninstall /kb:<KB Number>** | Uninstalls the security update. | **Note** For more information about the wusa.exe installer, see "Windows Update Stand-alone Installer" in the TechNet article, [Miscellaneous Changes in Windows 7](http://technet.microsoft.com/library/dd871148.aspx). **Verifying That** **the Update Has Been Applied** - **File Version Verification** Because there are several editions of Microsoft Windows, the following steps may be different on your system. If they are, see your product documentation to complete these steps. 1. Click **Start** and then enter an update file name in the **Search** box. 2. When the file appears under **Programs**, right-click the file name and click **Properties**. 3. On the **General** tab, compare the file size with the file information tables provided in the bulletin KB article. **Note** Depending on the edition of the operating system, or the programs that are installed on your system, some files that are listed in the file information table may not be installed. 4. You can also click the **Details** tab and compare information, such as file version and date modified, with the file information tables provided in the bulletin KB article. **Note** Attributes other than the file version may change during installation. Comparing other file attributes to the information in the file information table is not a supported method of verifying that the update has been applied. Also, in certain cases, files may be renamed during installation. If the file or version information is not present, use one of the other available methods to verify update installation. 5. Finally, you can also click the **Previous Versions** tab and compare file information for the previous version of the file with the file information for the new, or updated, version of the file. #### Windows Server 2012 (all editions) **Reference Table** The following table contains the security update information for this software. You can find additional information in the subsection, **Deployment Information**, in this section.

Inclusion in Future Service Packs The update for this issue will be included in a future service pack or update rollup
Deployment  
Installing without user intervention For all supported editions of Windows Server 2012:
Windows8-RT-KB2790655-x64.msu /quiet
Installing without restarting For all supported editions of Windows Server 2012:
Windows8-RT-KB2790655-x64.msu /quiet /norestart
Further information See the subsection, Detection and Deployment Tools and Guidance
Restart Requirement  
Restart required? Yes, you must restart your system after you apply this security update.
HotPatching Not applicable.
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 click Installed updates and select from the list of updates.
File Information See Microsoft Knowledge Base Article 2790655
Registry Key Verification Note A registry key does not exist to validate the presence of this update.
#### Deployment Information **Installing the Update** When you install this security update, the installer checks whether one or more of the files that are being updated on your system have previously been updated by a Microsoft hotfix. For more information about the terminology that appears in this bulletin, such as *hotfix*, see [Microsoft Knowledge Base Article 824684](http://support.microsoft.com/kb/824684). This security update supports the following setup switches. | Switch | Description | |--------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------| | **/?, /h,** **/help** | Displays help on supported switches. | | **/quiet** | Suppresses the display of status or error messages. | | **/norestart** | When combined with **/quiet**, the system will not be restarted after installation even if a restart is required to complete installation. | | **/warnrestart:<seconds>** | When combined with **/quiet**, the installer will warn the user before initiating restart. | | **/promptrestart** | When combined with **/quiet**, the installer will prompt before initiating restart. | | **/forcerestart** | When combined with **/quiet**, the installer will forcefully close applications and initiate restart. | | **/log:<file name>** | Enables logging to specified file. | | **/extract:<destination>** | Extracts the package contents to the destination folder. | | **/uninstall /kb:<KB Number>** | Uninstalls the security update. | **Note** For more information about the wusa.exe installer, see "Windows Update Stand-alone Installer" in the TechNet article, [Miscellaneous Changes in Windows 7](http://technet.microsoft.com/library/dd871148.aspx). **Verifying That the Update Has Been Applied** - **File Version Verification** Because there are several editions of Microsoft Windows, the following steps may be different on your system. If they are, see your product documentation to complete these steps. 1. Click **Start** and then enter an update file name in the **Start Search** box. 2. When the file appears under **Programs**, right-click the file name and click **Properties**. 3. On the **General** tab, compare the file size with the file information tables provided in the bulletin KB article. **Note** Depending on the edition of the operating system, or the programs that are installed on your system, some files that are listed in the file information table may not be installed. 4. You can also click the **Details** tab and compare information, such as file version and date modified, with the file information tables provided in the bulletin KB article. **Note** Attributes other than the file version may change during installation. Comparing other file attributes to the information in the file information table is not a supported method of verifying that the update has been applied. Also, in certain cases, files may be renamed during installation. If the file or version information is not present, use one of the other available methods to verify update installation. 5. Finally, you can also click the **Previous Versions** tab and compare file information for the previous version of the file with the file information for the new, or updated, version of the file. #### Windows RT (all editions) The following table contains the security update information for this software. | | | |---------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------| | **Inclusion in Future Service Packs** | The update for this issue will be included in a future service pack or update rollup. | | **Deployment** | This update is available via [Windows Update](http://go.microsoft.com/fwlink/?linkid=21130) only. | | **Restart Requirement** |   | | Restart required? | Yes, you must restart your system after you apply this security update. | | **Removal Information** | Click **Control Panel**, click **System and Security**, and then under Windows Update, click **Installed updates** and select from the list of updates. | | **File Information** | See [Microsoft Knowledge Base Article 2790655](http://support.microsoft.com/kb/2790655) | ### 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 (February 12, 2013): Bulletin published. - V1.1 (February 12, 2013): Added a link to Microsoft Knowledge Base Article 2790655 under Known Issues in the Executive Summary. *Built at 2014-04-18T13:49:36Z-07:00*