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 |
[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 |
**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. |
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. |
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. |
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. |
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. |
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. |
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 |