Microsoft Security Bulletin MS14-031 - Important

Vulnerability in TCP Protocol Could Allow Denial of Service (2962478)

Published: June 10, 2014

Version: 1.0

General Information

Executive Summary

This security update resolves a privately reported vulnerability in Microsoft Windows. The vulnerability could allow denial of service if an attacker sends a sequence of specially crafted packets to the target system.

This security update is rated Important for all supported editions of Windows Vista, Windows Server 2008, Windows 7, Windows Server 2008 R2, Windows 8, Windows Server 2012, Windows RT, Windows 8.1, Windows Server 2012 R2, and Windows RT 8.1. For more information, see the subsection, Affected and Non-Affected Software, in this section.

The security update addresses the vulnerability by modifying the way that the Windows TCP/IP stack handles specially crafted packets. For more information about the vulnerability, see the Frequently Asked Questions (FAQ) subsection for the specific vulnerability later in this bulletin.

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: 2962478
  • 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 Vista**
[Windows Vista Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=391caa00-7ba2-4fa3-8b7f-77c99a358afe) (2957189) Denial of Service Important 2868623 in [MS13-065](http://go.microsoft.com/fwlink/?linkid=314047)
[Windows Vista x64 Edition Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=39f32842-bc1d-41d5-ace7-8c398201a727) (2957189) Denial of Service Important 2868623 in [MS13-065](http://go.microsoft.com/fwlink/?linkid=314047)
**Windows Server 2008**
[Windows Server 2008 for 32-bit Systems Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=8877f6c1-e05c-480e-b3f9-dfb4e49f4480) (2957189) Denial of Service Important 2868623 in [MS13-065](http://go.microsoft.com/fwlink/?linkid=314047)
[Windows Server 2008 for x64-based Systems Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=7a865710-18c7-4faf-a0c9-17c08d228f90) (2957189) Denial of Service Important 2868623 in [MS13-065](http://go.microsoft.com/fwlink/?linkid=314047)
[Windows Server 2008 for Itanium-based Systems Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=55f02c85-34ce-4e15-af18-7b4407bd3def) (2957189) Denial of Service Important 2868623 in [MS13-065](http://go.microsoft.com/fwlink/?linkid=314047)
**Windows 7**
[Windows 7 for 32-bit Systems Service Pack 1](https://www.microsoft.com/download/details.aspx?familyid=24d0b604-65f8-4604-a151-b64dd2875574) (2957189) Denial of Service Important 2868623 in [MS13-065](http://go.microsoft.com/fwlink/?linkid=314047)
[Windows 7 for x64-based Systems Service Pack 1](https://www.microsoft.com/download/details.aspx?familyid=2932ef67-c719-48a8-a38b-2d04ff56b6be) (2957189) Denial of Service Important 2868623 in [MS13-065](http://go.microsoft.com/fwlink/?linkid=314047)
**Windows Server 2008 R2**
[Windows Server 2008 R2 for x64-based Systems Service Pack 1](https://www.microsoft.com/download/details.aspx?familyid=3f7d0d47-5830-4caf-930e-7dc21bda1e42) (2957189) Denial of Service Important 2868623 in [MS13-065](http://go.microsoft.com/fwlink/?linkid=314047)
[Windows Server 2008 R2 for Itanium-based Systems Service Pack 1](https://www.microsoft.com/download/details.aspx?familyid=f07dbb64-2d94-4069-9a58-d91ce814374b) (2957189) Denial of Service Important 2868623 in [MS13-065](http://go.microsoft.com/fwlink/?linkid=314047)
**Windows 8 and Windows 8.1**
[Windows 8 for 32-bit Systems](https://www.microsoft.com/download/details.aspx?familyid=4821b3a7-fb6c-4ec3-ac87-4ae1584dee38) (2957189) Denial of Service Important 2904659 in [MS14-006](http://go.microsoft.com/fwlink/?linkid=386450)
[Windows 8 for x64-based Systems](https://www.microsoft.com/download/details.aspx?familyid=99e4a8dd-59f1-4de7-b69b-f8bbc1d01152) (2957189) Denial of Service Important 2904659 in [MS14-006](http://go.microsoft.com/fwlink/?linkid=386450)
[Windows 8.1 for 32-bit Systems](https://www.microsoft.com/download/details.aspx?familyid=1b65d4b2-17f7-4af1-92dc-8b10974f6129)[1] (2957189) Denial of Service Important None
Windows 8.1 for 32-bit Systems[2] (2961858) Denial of Service Important None
[Windows 8.1 for x64-based Systems](https://www.microsoft.com/download/details.aspx?familyid=097c02f7-b0bd-4da9-a89b-13097aeed6f5)[1] (2957189) Denial of Service Important None
Windows 8.1 for x64-based Systems[2] (2961858) Denial of Service Important None
**Windows Server 2012 and Windows Server 2012 R2**
[Windows Server 2012](https://www.microsoft.com/download/details.aspx?familyid=0d5da19a-ff5a-4b40-99bc-b507450b9ee6) (2957189) Denial of Service Important 2904659 in [MS14-006](http://go.microsoft.com/fwlink/?linkid=386450)
[Windows Server 2012 R2](https://www.microsoft.com/download/details.aspx?familyid=d334c09a-4412-47c8-801e-1f58959f7786)[1] (2957189) Denial of Service Important None
Windows Server 2012 R2[2] (2961858) Denial of Service Important None
**Windows RT and Windows RT 8.1**
Windows RT[3] (2957189) Denial of Service Important 2904659 in [MS14-006](http://go.microsoft.com/fwlink/?linkid=386450)
Windows RT 8.1[1][3] (2957189) Denial of Service Important None
**Server Core installation option**
[Windows Server 2008 for 32-bit Systems Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=8877f6c1-e05c-480e-b3f9-dfb4e49f4480) (Server Core installation) (2957189) Denial of Service Important 2868623 in [MS13-065](http://go.microsoft.com/fwlink/?linkid=314047)
[Windows Server 2008 for x64-based Systems Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=7a865710-18c7-4faf-a0c9-17c08d228f90) (Server Core installation) (2957189) Denial of Service Important 2868623 in [MS13-065](http://go.microsoft.com/fwlink/?linkid=314047)
[Windows Server 2008 R2 for x64-based Systems Service Pack 1](https://www.microsoft.com/download/details.aspx?familyid=3f7d0d47-5830-4caf-930e-7dc21bda1e42) (Server Core installation) (2957189) Denial of Service Important 2868623 in [MS13-065](http://go.microsoft.com/fwlink/?linkid=314047)
[Windows Server 2012](https://www.microsoft.com/download/details.aspx?familyid=0d5da19a-ff5a-4b40-99bc-b507450b9ee6) (Server Core installation) (2957189) Denial of Service Important 2904659 in [MS14-006](http://go.microsoft.com/fwlink/?linkid=386450)
[Windows Server 2012 R2](https://www.microsoft.com/download/details.aspx?familyid=d334c09a-4412-47c8-801e-1f58959f7786) (Server Core installation)[1] (2957189) Denial of Service Important None
Windows Server 2012 R2 (Server Core installation)[2] (2961858) Denial of Service Important None
[1]This update is for systems that have the 2919355 update installed. See the **Update FAQ** for more information.

[2]This update is for systems that do not have the 2919355 update installed. This update is not available via the Microsoft Download Center. See the Update FAQ for more information.

[3]This update is available via Windows Update.

Non-Affected Software

Operating System
Windows Server 2003 Service Pack 2
Windows Server 2003 x64 Edition Service Pack 2
Windows Server 2003 with SP2 for Itanium-based Systems
Update FAQ ---------- **There are multiple updates listed for Windows 8.1 and Windows Server 2012 R2. Do I need to install all the updates?** No. Depending on how your system is configured to receive updates, only one of the updates for Windows 8.1 or Windows Server 2012 will apply. For systems running Windows 8.1 or Windows Server 2012 R2: - Update 2957189 is for systems that already have the 2919355 (Windows 8.1 Update) update installed. - Update 2961858 is for systems without the 2919355 update installed. Note that the 2961858 update is only available for customers managing updates using Windows Server Update Services (WSUS), Windows Intune, or System Center Configuration Manager. **For Windows 8.1, Windows Server 2012 R2, or Windows RT 8.1 are there any prerequisites for the 2957189 update?** Yes. Customers running Windows 8.1, Windows Server 2012 R2, or Windows RT 8.1 must first install the 2919355 (Windows 8.1 Update) update released in April, 2014 before installing 2957189 update. For more information about the prerequisite update, see [Microsoft Knowledge Base Article 2919355](https://support.microsoft.com/kb/2919355) **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 , 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 [June bulletin summary](http://technet.microsoft.com/library/security/ms14-jun). 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** **TCP Denial of Service Vulnerability - CVE-2014-1811** **Aggregate Severity Rating**
**Windows Vista**
Windows Vista Service Pack 2 **Important**  Denial of Service **Important**
Windows Vista x64 Edition Service Pack 2 **Important**  Denial of Service **Important**
**Window 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 Service Pack 1 **Important**  Denial of Service **Important**
Windows 7 for x64-based Systems Service Pack 1 **Important**  Denial of Service **Important**
**Window Server 2008 R2**
Windows Server 2008 R2 for x64-based Systems Service Pack 1 **Important**  Denial of Service **Important**
Windows Server 2008 R2 for Itanium-based Systems Service Pack 1 **Important**  Denial of Service **Important**
**Windows 8 and Windows 8.1**
Windows 8 for 32-bit Systems **Important**  Denial of Service **Important**
Windows 8 for x64-based Systems **Important**  Denial of Service **Important**
Windows 8.1 for 32-bit Systems **Important**  Denial of Service **Important**
Windows 8.1 for x64-based Systems **Important**  Denial of Service **Important**
**Window Server 2012 and Windows Server 2012 R2**
Windows Server 2012 **Important**  Denial of Service **Important**
Windows Server 2012 R2 **Important**  Denial of Service **Important**
**Windows RT and Windows RT 8.1**
Windows RT **Important**  Denial of Service **Important**
Windows RT 8.1 **Important**  Denial of Service **Important**
**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 Service Pack 1 (Server Core installation) **Important**  Denial of Service **Important**
Windows Server 2012 (Server Core installation) **Important**  Denial of Service **Important**
Windows Server 2012 R2 (Server Core installation) **Important**  Denial of Service **Important**

TCP Denial of Service Vulnerability - CVE-2014-1811

A denial of service vulnerability exists in the Windows TCP/IP networking protocol. An attacker who successfully exploited this vulnerability could cause the affected system to stop responding.

To view this vulnerability as a standard entry in the Common Vulnerabilities and Exposures list, see CVE-2014-1811.

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 denial of service vulnerability.

What causes the vulnerability?
The vulnerability is caused when the Windows TCP/IP stack improperly processes specially crafted packets.

What is TCP/IP?
TCP/IP is a set of networking protocols that are widely used on the Internet. TCP/IP provides communications across interconnected networks of computers that have diverse hardware architectures and that run various operating systems. TCP/IP includes standards for how computers communicate and conventions for connecting networks and for routing traffic. For more information about TCP/IP, see the TechNet article, Overview of networking and TCP/IP.

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

How could an attacker exploit the vulnerability?
A remote unauthenticated attacker could exploit this vulnerability by creating a program to send a sequence of specially crafted packets to a target system.

What systems are primarily at risk from the vulnerability?
Servers and workstations are most at risk from this vulnerability.

What does the update do?
The update addresses the vulnerability by modifying the way that the Windows TCP/IP stack handles the specially crafted packets.

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.

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 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-KB2957189-x86.msu

For all supported x64-based editions of Windows Vista:
Windows6.0-KB2957189-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 2957189
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-KB2957189-x86.msu

For all supported x64-based editions of Windows Server 2008:
Windows6.0-KB2957189-x64.msu

For all supported Itanium-based editions of Windows Server 2008:
Windows6.0-KB2957189-ia64.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 2957189
Registry key verification Note A registry key does not exist to validate the presence of this update.
  ### Windows 7 (all editions) **Reference Table** The following table contains the security update information for this software.

Security update file name For all supported 32-bit editions of Windows 7:
Windows6.1-KB2957189-x86.msu

For all supported x64-based editions of Windows 7:
Windows6.1-KB2957189-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 2957189
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-KB2957189-x64.msu

For all supported Itanium-based editions of Windows Server 2008 R2:
Windows6.1-KB2957189-ia64.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 2957189
Registry key verification Note A registry key does not exist to validate the presence of this update.
  ### Windows 8 and Windows 8.1 (all editions) **Reference Table** The following table contains the security update information for this software.

Security update file name For all supported 32-bit editions of Windows 8:
Windows8-RT-KB2957189-x86.msu

For all supported x64-based editions of Windows 8:
Windows8-RT-KB2957189-x64.msu

For all supported 32-bit editions of Windows 8.1:
Windows8.1-KB2957189-x86.msu

For all supported x64-based editions of Windows 8.1:
Windows8.1-KB2957189-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 2957189
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-KB2957189-x64.msu

For all supported editions of Windows Server 2012 R2:
Windows8.1-KB2957189-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 2957189
Registry key verification Note A registry key does not exist to validate the presence of this update.
  ### Windows RT and Windows RT 8.1 (all editions) Reference Table The following table contains the security update information for this software.

Deployment These updates are available via Windows Update only.
Restart Requirement Yes, you must restart your system after you apply this security update.
Removal Information 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 2957189
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 (June 10, 2014): Bulletin published. *Page generated 2014-06-16 13:46Z-07:00.*