sdirectfullpac

Attacks involving malicious insiders cost UK businesses an average of £144,501, according to a study by the Ponemon Institute commissioned by professional services firm Accenture.

1. Goodbye 3 / 5.2 Denial Of Service Tool Download

Oct 19, 2016 - Denial Of Service Tool; Website Denial Of Service Tool. Denial of service tool. SC-5(2) DENIAL OF SERVICE PROTECTION.

Distributed denial of service (DDoS) attacks have been the second most costly type of attack, with an average price tag of £96,668 per incident.

Business disruption and information loss represents the costliest consequence of cyber crime, accounting for 75% of losses in the UK.

The survey of 332 company representatives also revealed that organisations are working harder and spend more time trying to contain malicious code attacks (56.6 days) and malicious insiders (47.6 days), with ransomware being the fastest-growing type of attack, up 25% in the past year.

“This should be a concern to UK businesses when the average ransomware attack could cripple operations for as long as five weeks and the financial consequences of information loss are set to increase with the GDPR [EU General Data Protection Regulation] compliance deadline in May 2018,” said Rick Hemsley, managing director at Accenture Security.

“UK businesses needs to get the basics right, such as timely patching of their systems, and ensure they are protecting their most high-value assets from the inside out,” he added.

Other key findings of the survey include that UK companies experience 71 breaches a year on average, costing an average of £6.56m, up 21.2% in the past year, compared with the global average of 130 breaches per company each year.

Read more about insider threats

• Ward off insider healthcare security threats with this tech.
• Mainframe blindspots expose companies to insider threats.
• Crafting an insider threat program: Why and how.

In the light of the GDPR compliance deadline, it is not surprising that 68% of companies surveyed are deploying advanced identity and access governance systems.

Goodbye 3 / 5.2 Denial Of Service Tool Download

The proportion of companies that are still investing in advanced perimeter controls is still relatively high at 63%, while 60% are deploying security intelligence systems, followed by “extensive deployment” of encryption technologies (55%), and “extensive use” of data loss prevention (50%).

Surprisingly, only 28% of companies are investing in the deployment of advanced technologies such as automation, orchestration and machine learning, which ranked third highest in terms of cost savings. Security intelligence systems ranked top, followed by advanced identity and access governance.

Read more about DDoS attacks

• Criminal activity has become the top motivation for DDoS attacks, as the average attack becomes strong enough to down most businesses – so taking no action is not an option.
• Average DDoS attacks fatal to most businesses, report reveals.
• There is a real concern that many companies are being affected by the DDoS attacks commissioned by competitors, according to Kaspersky Lab.

Security suppliers are increasingly adding these features to their product sets in an attempt to reduce the workloads of information security professionals to enable them to focus on the more strategic aspects of cyber security.

According to Accenture, organisations should not rely on compliance alone to enhance their cyber defence capabilities.

It recommends that organisations carry out “extreme pressure testing” to identify vulnerabilities and balance traditional security spending with spending on new technologies, particularly security analytics and artificial intelligence to enhance the effectiveness of their cyber defences.

Read more on Hackers and cybercrime prevention

• In The Current Issue:
  • Microsoft’s modern desktop management
  • Giving healthcare tech a human touch
  • How Open University was educated to move from bespoke IT to vanilla SAP

• A hospice for a dying HE/FE funding regime - A review of the Augar Report– When IT Meets Politics
• ‘A breath of fresh air’ for Gov.uk Verify?– Computer Weekly Editors Blog

• E-commerce sites warned of heightened DDoS threat– ComputerWeekly.com
• Targeted cyber attacks doubled in past year, study ..– ComputerWeekly.com
• Major DDoS cyber crime website shut down– ComputerWeekly.com

-->

Vulnerability in .NET Framework Could Allow Denial of Service (2990931)

Published: September 9, 2014 Updated: September 17, 2014

Version: 1.1

General Information

Executive Summary

This security update resolves one privately reported vulnerability in Microsoft .NET Framework. The vulnerability could allow denial of service if an attacker sends a small number of specially crafted requests to an affected .NET-enabled website, service, or program that uses Windows Communication Foundation (WCF). By default, no WCF programs are installed when Microsoft .NET Framework is installed on any supported edition of Microsoft Windows. To be affected by the vulnerability, customers must manually install a .NET-enabled website, service, or program that uses Windows Communication Foundation (WCF).

This security update is rated Important for Microsoft .NET Framework 1.1 Service Pack 1, Microsoft .NET Framework 2.0 Service Pack 2, Microsoft .NET Framework 3.0 Service Pack 2, Microsoft .NET Framework 3.5, Microsoft .NET Framework 3.5.1, Microsoft .NET Framework 4, and Microsoft .NET Framework 4.5/4.5.1/4.5.2 on affected releases of Microsoft Windows. For more information, see the Affected and Non-Affected Software section.

The security update addresses the vulnerabilities correcting how Microsoft .NET Framework handles specially crafted requests. For more information about the vulnerabilities, 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. For information about specific configuration options in automatic updating, see Microsoft Knowledge Base Article 294871. For customers who do not have automatic updating enabled, the steps in Turn automatic updating on or off can be used to enable automatic updating.

For administrators and enterprise installations, or end users who want to install this security update manually (including customers who have not enabled automatic updating), 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. The updates are also available via the download links in the Affected Software table later in this bulletin.

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

Knowledge Base Article

• Knowledge Base Article: 2990931
• 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.

**Operating System**	**Component**	**Maximum Security Impact**	**Aggregate Severity Rating**	**Updates Replaced**
**Windows Server 2003**
Windows Server 2003 Service Pack 2	[Microsoft .NET Framework 1.1 Service Pack 1](http://www.microsoft.com/downloads/details.aspx?familyid=553cb155-4a23-442d-877e-521dadc80672) (2972207)	Denial of Service	Important	2898860 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454)
Windows Server 2003 Service Pack 2	[Microsoft .NET Framework 2.0 Service Pack 2](http://www.microsoft.com/downloads/details.aspx?familyid=a2328565-d0f6-4bc9-ae44-8fb171cb8e37) (2972214)	Denial of Service	Important	2898856 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454) and 2833940 in [MS13-052](http://go.microsoft.com/fwlink/?linkid=299844)
Windows Server 2003 Service Pack 2	[Microsoft .NET Framework 3.0 Service Pack 2](http://www.microsoft.com/downloads/details.aspx?familyid=21d0eb4c-6787-4e8f-b252-e10fb44dd2fb) (2973115)	Denial of Service	Important	2756918 in [MS13-004](http://go.microsoft.com/fwlink/?linkid=268279)
Windows Server 2003 Service Pack 2	[Microsoft .NET Framework 4](http://www.microsoft.com/downloads/details.aspx?familyid=7fa30ccf-7d3e-49de-b40e-a80d055d7dd8)[1](2972215)	Denial of Service	Important	2898855 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454) and 2835393 in [MS13-052](http://go.microsoft.com/fwlink/?linkid=299844)
Windows Server 2003 x64 Edition Service Pack 2	[Microsoft .NET Framework 2.0 Service Pack 2](http://www.microsoft.com/downloads/details.aspx?familyid=a2328565-d0f6-4bc9-ae44-8fb171cb8e37) (2972214)	Denial of Service	Important	2898856 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454) and 2833940 in [MS13-052](http://go.microsoft.com/fwlink/?linkid=299844)
Windows Server 2003 x64 Edition Service Pack 2	[Microsoft .NET Framework 3.0 Service Pack 2](http://www.microsoft.com/downloads/details.aspx?familyid=21d0eb4c-6787-4e8f-b252-e10fb44dd2fb) (2973115)	Denial of Service	Important	2756918 in [MS13-004](http://go.microsoft.com/fwlink/?linkid=268279)
Windows Server 2003 x64 Edition Service Pack 2	[Microsoft .NET Framework 4](http://www.microsoft.com/downloads/details.aspx?familyid=7fa30ccf-7d3e-49de-b40e-a80d055d7dd8)[1](2972215)	Denial of Service	Important	2898855 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454) and 2835393 in [MS13-052](http://go.microsoft.com/fwlink/?linkid=299844)
Windows Server 2003 with SP2 for Itanium-based Systems	[Microsoft .NET Framework 2.0 Service Pack 2](http://www.microsoft.com/downloads/details.aspx?familyid=a2328565-d0f6-4bc9-ae44-8fb171cb8e37) (2972214)	Denial of Service	Important	2898856 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454) and 2833940 in [MS13-052](http://go.microsoft.com/fwlink/?linkid=299844)
Windows Server 2003 with SP2 for Itanium-based Systems	[Microsoft .NET Framework 4](http://www.microsoft.com/downloads/details.aspx?familyid=7fa30ccf-7d3e-49de-b40e-a80d055d7dd8)[1](2972215)	Denial of Service	Important	2898855 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454) and 2835393 in [MS13-052](http://go.microsoft.com/fwlink/?linkid=299844)
**Windows Vista**
Windows Vista Service Pack 2	[Microsoft .NET Framework 2.0 Service Pack 2](http://www.microsoft.com/downloads/details.aspx?familyid=7482a8ae-a8e3-4e19-ad2b-d58af3e25bc9) (2974268)	Denial of Service	Important	2898858 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454) and 2833947 in [MS13-052](http://go.microsoft.com/fwlink/?linkid=299844)
Windows Vista Service Pack 2	[Microsoft .NET Framework 3.0 Service Pack 2](http://www.microsoft.com/downloads/details.aspx?familyid=3f0f07b3-1ab4-4ce7-81c9-fcba9ba031cc) (2974269)	Denial of Service	Important	2756919 in [MS13-004](http://go.microsoft.com/fwlink/?linkid=268279)
Windows Vista Service Pack 2	[Microsoft .NET Framework 4](http://www.microsoft.com/downloads/details.aspx?familyid=7fa30ccf-7d3e-49de-b40e-a80d055d7dd8)[1](2972215)	Denial of Service	Important	2898855 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454) and 2835393 in [MS13-052](http://go.microsoft.com/fwlink/?linkid=299844)
Windows Vista Service Pack 2	[Microsoft .NET Framework 4.5/4.5.1/4.5.2](http://www.microsoft.com/downloads/details.aspx?familyid=0973f401-26a3-48c0-a5d7-802b269ef18c) (2972216)	Denial of Service	Important	None
Windows Vista x64 Edition Service Pack 2	[Microsoft .NET Framework 2.0 Service Pack 2](http://www.microsoft.com/downloads/details.aspx?familyid=7482a8ae-a8e3-4e19-ad2b-d58af3e25bc9) (2974268)	Denial of Service	Important	2898858 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454) and 2833947 in [MS13-052](http://go.microsoft.com/fwlink/?linkid=299844)
Windows Vista x64 Edition Service Pack 2	[Microsoft .NET Framework 3.0 Service Pack 2](http://www.microsoft.com/downloads/details.aspx?familyid=3f0f07b3-1ab4-4ce7-81c9-fcba9ba031cc) (2974269)	Denial of Service	Important	2756919 in [MS13-004](http://go.microsoft.com/fwlink/?linkid=268279)
Windows Vista x64 Edition Service Pack 2	[Microsoft .NET Framework 4](http://www.microsoft.com/downloads/details.aspx?familyid=7fa30ccf-7d3e-49de-b40e-a80d055d7dd8)[1](2972215)	Denial of Service	Important	2898855 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454) and 2835393 in [MS13-052](http://go.microsoft.com/fwlink/?linkid=299844)
Windows Vista x64 Edition Service Pack 2	[Microsoft .NET Framework 4.5/4.5.1/4.5.2](http://www.microsoft.com/downloads/details.aspx?familyid=0973f401-26a3-48c0-a5d7-802b269ef18c) (2972216)	Denial of Service	Important	None
**Windows Server 2008**
Windows Server 2008 for 32-bit Systems Service Pack 2	[Microsoft .NET Framework 2.0 Service Pack 2](http://www.microsoft.com/downloads/details.aspx?familyid=7482a8ae-a8e3-4e19-ad2b-d58af3e25bc9) (2974268)	Denial of Service	Important	2898858 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454) and 2833947 in [MS13-052](http://go.microsoft.com/fwlink/?linkid=299844)
Windows Server 2008 for 32-bit Systems Service Pack 2	[Microsoft .NET Framework 3.0 Service Pack 2](http://www.microsoft.com/downloads/details.aspx?familyid=3f0f07b3-1ab4-4ce7-81c9-fcba9ba031cc) (2974269)	Denial of Service	Important	2756919 in [MS13-004](http://go.microsoft.com/fwlink/?linkid=268279)
Windows Server 2008 for 32-bit Systems Service Pack 2	[Microsoft .NET Framework 4](http://www.microsoft.com/downloads/details.aspx?familyid=7fa30ccf-7d3e-49de-b40e-a80d055d7dd8)[1](2972215)	Denial of Service	Important	2898855 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454) and 2835393 in [MS13-052](http://go.microsoft.com/fwlink/?linkid=299844)
Windows Server 2008 for 32-bit Systems Service Pack 2	[Microsoft .NET Framework 4.5/4.5.1/4.5.2](http://www.microsoft.com/downloads/details.aspx?familyid=0973f401-26a3-48c0-a5d7-802b269ef18c) (2972216)	Denial of Service	Important	None
Windows Server 2008 for x64-based Systems Service Pack 2	[Microsoft .NET Framework 2.0 Service Pack 2](http://www.microsoft.com/downloads/details.aspx?familyid=7482a8ae-a8e3-4e19-ad2b-d58af3e25bc9) (2974268)	Denial of Service	Important	2898858 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454) and 2833947 in [MS13-052](http://go.microsoft.com/fwlink/?linkid=299844)
Windows Server 2008 for x64-based Systems Service Pack 2	[Microsoft .NET Framework 3.0 Service Pack 2](http://www.microsoft.com/downloads/details.aspx?familyid=3f0f07b3-1ab4-4ce7-81c9-fcba9ba031cc) (2974269)	Denial of Service	Important	2756919 in [MS13-004](http://go.microsoft.com/fwlink/?linkid=268279)
Windows Server 2008 for x64-based Systems Service Pack 2	[Microsoft .NET Framework 4](http://www.microsoft.com/downloads/details.aspx?familyid=7fa30ccf-7d3e-49de-b40e-a80d055d7dd8)[1](2972215)	Denial of Service	Important	2898855 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454) and 2835393 in [MS13-052](http://go.microsoft.com/fwlink/?linkid=299844)
Windows Server 2008 for x64-based Systems Service Pack 2	[Microsoft .NET Framework 4.5/4.5.1/4.5.2](http://www.microsoft.com/downloads/details.aspx?familyid=0973f401-26a3-48c0-a5d7-802b269ef18c) (2972216)	Denial of Service	Important	None
Windows Server 2008 for Itanium-based Systems Service Pack 2	[Microsoft .NET Framework 2.0 Service Pack 2](http://www.microsoft.com/downloads/details.aspx?familyid=7482a8ae-a8e3-4e19-ad2b-d58af3e25bc9) (2974268)	Denial of Service	Important	2898858 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454) and 2833947 in [MS13-052](http://go.microsoft.com/fwlink/?linkid=299844)
Windows Server 2008 for Itanium-based Systems Service Pack 2	[Microsoft .NET Framework 3.0 Service Pack 2](http://www.microsoft.com/downloads/details.aspx?familyid=3f0f07b3-1ab4-4ce7-81c9-fcba9ba031cc) (2974269)	Denial of Service	Important	2756919 in [MS13-004](http://go.microsoft.com/fwlink/?linkid=268279)
Windows Server 2008 for Itanium-based Systems Service Pack 2	[Microsoft .NET Framework 4](http://www.microsoft.com/downloads/details.aspx?familyid=7fa30ccf-7d3e-49de-b40e-a80d055d7dd8)[1](2972215)	Denial of Service	Important	2898855 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454) and 2835393 in [MS13-052](http://go.microsoft.com/fwlink/?linkid=299844)
**Windows 7**
Windows 7 for 32-bit Systems Service Pack 1	[Microsoft .NET Framework 3.5.1](http://www.microsoft.com/downloads/details.aspx?familyid=ee1d9b6e-9638-4280-a31a-c56725f2faaf) (2972211)	Denial of Service	Important	2898857 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454) and 2833946 in [MS13-052](http://go.microsoft.com/fwlink/?linkid=299844)
Windows 7 for 32-bit Systems Service Pack 1	[Microsoft .NET Framework 3.5.1](http://www.microsoft.com/downloads/details.aspx?familyid=c3a8e672-ebf0-4bb3-aec4-bab5e8ac4e83) (2973112)	Denial of Service	Important	2756921 in [MS13-004](http://go.microsoft.com/fwlink/?linkid=268279)
Windows 7 for 32-bit Systems Service Pack 1	[Microsoft .NET Framework 4](http://www.microsoft.com/downloads/details.aspx?familyid=7fa30ccf-7d3e-49de-b40e-a80d055d7dd8)[1](2972215)	Denial of Service	Important	2898855 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454) and 2835393 in [MS13-052](http://go.microsoft.com/fwlink/?linkid=299844)
Windows 7 for 32-bit Systems Service Pack 1	[Microsoft .NET Framework 4.5/4.5.1/4.5.2](http://www.microsoft.com/downloads/details.aspx?familyid=0973f401-26a3-48c0-a5d7-802b269ef18c) (2972216)	Denial of Service	Important	None
Windows 7 for x64-based Systems Service Pack 1	[Microsoft .NET Framework 3.5.1](http://www.microsoft.com/downloads/details.aspx?familyid=ee1d9b6e-9638-4280-a31a-c56725f2faaf) (2972211)	Denial of Service	Important	2898857 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454) and 2833946 in [MS13-052](http://go.microsoft.com/fwlink/?linkid=299844)
Windows 7 for x64-based Systems Service Pack 1	[Microsoft .NET Framework 3.5.1](http://www.microsoft.com/downloads/details.aspx?familyid=c3a8e672-ebf0-4bb3-aec4-bab5e8ac4e83) (2973112)	Denial of Service	Important	None
Windows 7 for x64-based Systems Service Pack 1	[Microsoft .NET Framework 4](http://www.microsoft.com/downloads/details.aspx?familyid=7fa30ccf-7d3e-49de-b40e-a80d055d7dd8)[1](2972215)	Denial of Service	Important	2898855 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454) and 2835393 in [MS13-052](http://go.microsoft.com/fwlink/?linkid=299844)
Windows 7 for x64-based Systems Service Pack 1	[Microsoft .NET Framework 4.5/4.5.1/4.5.2](http://www.microsoft.com/downloads/details.aspx?familyid=0973f401-26a3-48c0-a5d7-802b269ef18c) (2972216)	Denial of Service	Important	None
**Windows Server 2008 R2**
Windows Server 2008 R2 for x64-based Systems Service Pack 1	[Microsoft .NET Framework 3.5.1](http://www.microsoft.com/downloads/details.aspx?familyid=ee1d9b6e-9638-4280-a31a-c56725f2faaf) (2972211)	Denial of Service	Important	2898857 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454) and 2833946 in [MS13-052](http://go.microsoft.com/fwlink/?linkid=299844)
Windows Server 2008 R2 for x64-based Systems Service Pack 1	[Microsoft .NET Framework 3.5.1](http://www.microsoft.com/downloads/details.aspx?familyid=c3a8e672-ebf0-4bb3-aec4-bab5e8ac4e83) (2973112)	Denial of Service	Important	None
Windows Server 2008 R2 for x64-based Systems Service Pack 1	[Microsoft .NET Framework 4](http://www.microsoft.com/downloads/details.aspx?familyid=7fa30ccf-7d3e-49de-b40e-a80d055d7dd8)[1](2972215)	Denial of Service	Important	2898855 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454) and 2835393 in [MS13-052](http://go.microsoft.com/fwlink/?linkid=299844)
Windows Server 2008 R2 for x64-based Systems Service Pack 1	[Microsoft .NET Framework 4.5/4.5.1/4.5.2](http://www.microsoft.com/downloads/details.aspx?familyid=0973f401-26a3-48c0-a5d7-802b269ef18c) (2972216)	Denial of Service	Important	None
Windows Server 2008 R2 for Itanium-based Systems Service Pack 1	[Microsoft .NET Framework 3.5.1](http://www.microsoft.com/downloads/details.aspx?familyid=ee1d9b6e-9638-4280-a31a-c56725f2faaf) (2972211)	Denial of Service	Important	2898857 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454) and 2833946 in [MS13-052](http://go.microsoft.com/fwlink/?linkid=299844)
Windows Server 2008 R2 for Itanium-based Systems Service Pack 1	[Microsoft .NET Framework 3.5.1](http://www.microsoft.com/downloads/details.aspx?familyid=c3a8e672-ebf0-4bb3-aec4-bab5e8ac4e83) (2973112)	Denial of Service	Important	None
Windows Server 2008 R2 for Itanium-based Systems Service Pack 1	[Microsoft .NET Framework 4](http://www.microsoft.com/downloads/details.aspx?familyid=7fa30ccf-7d3e-49de-b40e-a80d055d7dd8)[1](2972215)	Denial of Service	Important	2898855 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454) and 2835393 in [MS13-052](http://go.microsoft.com/fwlink/?linkid=299844)
**Windows 8 and Windows 8.1**
Windows 8 for 32-bit Systems	[Microsoft .NET Framework 3.5](http://www.microsoft.com/downloads/details.aspx?familyid=752de275-2411-47ae-be78-ae00df5d6780) (2972212)	Denial of Service	Important	2898866 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454) and 2833959 in [MS13-052](http://go.microsoft.com/fwlink/?linkid=299844)
Windows 8 for 32-bit Systems	[Microsoft .NET Framework 3.5](http://www.microsoft.com/downloads/details.aspx?familyid=838407b4-383f-4e7a-93a7-395b22341765) (2973113)	Denial of Service	Important	2756923 in [MS13-004](http://go.microsoft.com/fwlink/?linkid=268279)
Windows 8 for 32-bit Systems	[Microsoft .NET Framework 4.5/4.5.1/4.5.2](http://www.microsoft.com/downloads/details.aspx?familyid=d576e236-054d-4034-a022-33b3b786516e) (2977766)	Denial of Service	Important	None
Windows 8 for x64-based Systems	[Microsoft .NET Framework 3.5](http://www.microsoft.com/downloads/details.aspx?familyid=752de275-2411-47ae-be78-ae00df5d6780) (2972212)	Denial of Service	Important	2898866 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454) and 2833959 in [MS13-052](http://go.microsoft.com/fwlink/?linkid=299844)
Windows 8 for x64-based Systems	[Microsoft .NET Framework 3.5](http://www.microsoft.com/downloads/details.aspx?familyid=838407b4-383f-4e7a-93a7-395b22341765) (2973113)	Denial of Service	Important	2756923 in [MS13-004](http://go.microsoft.com/fwlink/?linkid=268279)
Windows 8 for x64-based Systems	[Microsoft .NET Framework 4.5/4.5.1/4.5.2](http://www.microsoft.com/downloads/details.aspx?familyid=d576e236-054d-4034-a022-33b3b786516e) (2977766)	Denial of Service	Important	None
Windows 8.1 for 32-bit Systems	[Microsoft .NET Framework 3.5](http://www.microsoft.com/downloads/details.aspx?familyid=d248d2ea-fc52-458b-95b9-dac5b9778833) (2972213)	Denial of Service	Important	2898868 in [MS13-004](http://go.microsoft.com/fwlink/?linkid=268279)
Windows 8.1 for 32-bit Systems	[Microsoft .NET Framework 3.5](http://www.microsoft.com/downloads/details.aspx?familyid=5d4ef1bb-f0e5-4cd4-bdf0-a4d37494f13f) (2973114)	Denial of Service	Important	None
Windows 8.1 for 32-bit Systems	[Microsoft .NET Framework 4.5.1/4.5.2](http://www.microsoft.com/downloads/details.aspx?familyid=db05b1b0-c9c6-443e-8023-7ad89be6f74b) (2977765)	Denial of Service	Important	None
Windows 8.1 for x64-based Systems	[Microsoft .NET Framework 3.5](http://www.microsoft.com/downloads/details.aspx?familyid=d248d2ea-fc52-458b-95b9-dac5b9778833) (2972213)	Denial of Service	Important	2898868 in [MS13-004](http://go.microsoft.com/fwlink/?linkid=268279)
Windows 8.1 for x64-based Systems	[Microsoft .NET Framework 3.5](http://www.microsoft.com/downloads/details.aspx?familyid=5d4ef1bb-f0e5-4cd4-bdf0-a4d37494f13f) (2973114)	Denial of Service	Important	None
Windows 8.1 for x64-based Systems	[Microsoft .NET Framework 4.5.1/4.5.2](http://www.microsoft.com/downloads/details.aspx?familyid=db05b1b0-c9c6-443e-8023-7ad89be6f74b) (2977765)	Denial of Service	Important	None
**Windows Server 2012 and Windows Server 2012 R2**
Windows Server 2012	[Microsoft .NET Framework 3.5](http://www.microsoft.com/downloads/details.aspx?familyid=752de275-2411-47ae-be78-ae00df5d6780) (2972212)	Denial of Service	Important	2898866 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454) and 2833959 in [MS13-052](http://go.microsoft.com/fwlink/?linkid=299844)
Windows Server 2012	[Microsoft .NET Framework 3.5](http://www.microsoft.com/downloads/details.aspx?familyid=838407b4-383f-4e7a-93a7-395b22341765) (2973113)	Denial of Service	Important	2756923 in [MS13-004](http://go.microsoft.com/fwlink/?linkid=268279)
Windows Server 2012	[Microsoft .NET Framework 4.5/4.5.1/4.5.2](http://www.microsoft.com/downloads/details.aspx?familyid=d576e236-054d-4034-a022-33b3b786516e) (2977766)	Denial of Service	Important	None
Windows Server 2012 R2	[Microsoft .NET Framework 3.5](http://www.microsoft.com/downloads/details.aspx?familyid=d248d2ea-fc52-458b-95b9-dac5b9778833) (2972213)	Denial of Service	Important	2898868 in [MS13-004](http://go.microsoft.com/fwlink/?linkid=268279)
Windows Server 2012 R2	[Microsoft .NET Framework 3.5](http://www.microsoft.com/downloads/details.aspx?familyid=5d4ef1bb-f0e5-4cd4-bdf0-a4d37494f13f) (2973114)	Denial of Service	Important	None
Windows Server 2012 R2	[Microsoft .NET Framework 4.5.1/4.5.2](http://www.microsoft.com/downloads/details.aspx?familyid=db05b1b0-c9c6-443e-8023-7ad89be6f74b) (2977765)	Denial of Service	Important	None
**Windows RT and Windows RT 8.1**
Windows RT	Microsoft .NET Framework 4.5/4.5.1/4.5.2[2](2977766)	Denial of Service	Important	None
Windows RT 8.1	Microsoft .NET Framework 4.5.1/4.5.2[2](2977765)	Denial of Service	Important	None
**Server Core installation option**
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)	[Microsoft .NET Framework 3.5.1](http://www.microsoft.com/downloads/details.aspx?familyid=ee1d9b6e-9638-4280-a31a-c56725f2faaf) (2972211)	Denial of Service	Important	2898857 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454) and 2833946 in [MS13-052](http://go.microsoft.com/fwlink/?linkid=299844)
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)	[Microsoft .NET Framework 3.5.1](http://www.microsoft.com/downloads/details.aspx?familyid=c3a8e672-ebf0-4bb3-aec4-bab5e8ac4e83) (2973112)	Denial of Service	Important	None
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)	[Microsoft .NET Framework 4](http://www.microsoft.com/downloads/details.aspx?familyid=7fa30ccf-7d3e-49de-b40e-a80d055d7dd8)[1](2972215)	Denial of Service	Important	2898855 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454) and 2835393 in [MS13-052](http://go.microsoft.com/fwlink/?linkid=299844)
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)	[Microsoft .NET Framework 4.5/4.5.1/4.5.2](http://www.microsoft.com/downloads/details.aspx?familyid=0973f401-26a3-48c0-a5d7-802b269ef18c) (2972216)	Denial of Service	Important	None
Windows Server 2012 (Server Core installation)	[Microsoft .NET Framework 3.5](http://www.microsoft.com/downloads/details.aspx?familyid=752de275-2411-47ae-be78-ae00df5d6780) (2972212)	Denial of Service	Important	2898866 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454) and 2833959 in [MS13-052](http://go.microsoft.com/fwlink/?linkid=299844)
Windows Server 2012 (Server Core installation)	[Microsoft .NET Framework 3.5](http://www.microsoft.com/downloads/details.aspx?familyid=838407b4-383f-4e7a-93a7-395b22341765) (2973113)	Denial of Service	Important	2756923 in [MS13-004](http://go.microsoft.com/fwlink/?linkid=268279)
Windows Server 2012 (Server Core installation)	[Microsoft .NET Framework 4.5/4.5.1/4.5.2](http://www.microsoft.com/downloads/details.aspx?familyid=d576e236-054d-4034-a022-33b3b786516e) (2977766)	Denial of Service	Important	None
Windows Server 2012 R2 (Server Core installation)	[Microsoft .NET Framework 3.5](http://www.microsoft.com/downloads/details.aspx?familyid=d248d2ea-fc52-458b-95b9-dac5b9778833) (2972213)	Denial of Service	Important	2898868 in [MS13-004](http://go.microsoft.com/fwlink/?linkid=268279)
Windows Server 2012 R2 (Server Core installation)	[Microsoft .NET Framework 3.5](http://www.microsoft.com/downloads/details.aspx?familyid=5d4ef1bb-f0e5-4cd4-bdf0-a4d37494f13f) (2973114)	Denial of Service	Important	None
Windows Server 2012 R2 (Server Core installation)	[Microsoft .NET Framework 4.5.1/4.5.2](http://www.microsoft.com/downloads/details.aspx?familyid=db05b1b0-c9c6-443e-8023-7ad89be6f74b) (2977765)	Denial of Service	Important	None

^[1]**.NET Framework 4 and .NET Framework 4 Client Profile affected.** The .NET Framework version 4 redistributable packages are available in two profiles: .NET Framework 4 and .NET Framework 4 Client Profile. .NET Framework 4 Client Profile is a subset of .NET Framework 4. The vulnerability addressed in this update affects both .NET Framework 4 and .NET Framework 4 Client Profile. For more information, see the MSDN article, [Installing the .NET Framework](http://msdn.microsoft.com/library/5a4x27ek).

^[2]This update is available via Windows Update.

Non-Affected Software

Software

Microsoft .NET Framework 3.5 Service Pack 1

**Non-Applicable Software**

Operating System

Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)

Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)

Update FAQ ---------- **How do I determine which version of the Microsoft .NET Framework is installed?** You can install and run multiple versions of the .NET Framework on a system, and you can install the versions in any order. There are several ways to determine which versions of the .NET Framework are currently installed. For more information, see [Microsoft Knowledge Base Article 318785](https://support.microsoft.com/kb/318785). **What is the difference between .NET Framework 4 and .NET Framework 4 Client Profile?** The .NET Framework version 4 redistributable packages are available in two profiles: .NET Framework 4 and .NET Framework 4 Client Profile. The .NET Framework 4 Client Profile is a subset of the .NET Framework 4 profile that is optimized for client applications. It provides functionality for most client applications, including Windows Presentation Foundation (WPF), Windows Forms, Windows Communication Foundation (WCF), and ClickOnce features. This enables faster deployment and a smaller install package for applications that target the .NET Framework 4 Client Profile. For more information, see the MSDN article, [.NET Framework Client Profile](http://msdn.microsoft.com/library/cc656912). **There are multiple update packages available for some of the affected software. Do I need to install all the updates listed in the Affected Software table for the software?** Yes. Customers should apply all updates offered for the software installed on their systems. **Do I need to install these security updates in a particular sequence?** No. Multiple updates for a given system can be applied in any sequence. **I am using an older release of the software discussed in this security bulletin. What should I do?** The affected software listed in this bulletin has been tested to determine which releases are affected. Other releases are past their support life cycle. For more information about the product lifecycle, see the [Microsoft Support Lifecycle](http://go.microsoft.com/fwlink/?linkid=21742) website. It should be a priority for customers who have older releases of the software to migrate to supported releases to prevent potential exposure to vulnerabilities. To determine the support lifecycle for your software release, see [Select a Product for Lifecycle Information](http://go.microsoft.com/fwlink/?linkid=169555). For more information about service packs for these software releases, see [Service Pack Lifecycle Support Policy](http://go.microsoft.com/fwlink/?linkid=89213). Customers who require custom support for older software must contact their Microsoft account team representative, their Technical Account Manager, or the appropriate Microsoft partner representative for custom support options. Customers without an Alliance, Premier, or Authorized Contract can contact their local Microsoft sales office. For contact information, see the [Microsoft Worldwide Information](http://go.microsoft.com/fwlink/?linkid=33329) website, select the country in the Contact Information list, and then click **Go** to see a list of telephone numbers. When you call, ask to speak with the local Premier Support sales manager. For more information, see the [Microsoft Support Lifecycle Policy FAQ](http://go.microsoft.com/fwlink/?linkid=169557). Severity Ratings and Vulnerability Identifiers ---------------------------------------------- The following severity ratings assume the potential maximum impact of the vulnerability. For information regarding the likelihood, within 30 days of this security bulletin's release, of the exploitability of the vulnerability in relation to its severity rating and security impact, please see the Exploitability Index in the [September bulletin summary](https://technet.microsoft.com/library/security/ms14-sep). 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**	**.NET Framework Denial of Service Vulnerability - CVE-2014-4072**	**Aggregate Severity Rating**
**Microsoft .NET Framework 1.1 Service Pack 1**
Microsoft .NET Framework 1.1 Service Pack 1 on Microsoft Windows Server 2003 Service Pack 2 (2972207)	**Important** Denial of Service	**Important**
**Microsoft .NET Framework 2.0 Service Pack 2**
Microsoft .NET Framework 2.0 Service Pack 2 when installed on Microsoft Windows Server 2003 Service Pack 2 (2972214)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 2.0 Service Pack 2 when installed on Microsoft Windows Server 2003 x64 Edition Service Pack 2 (2972214)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 2.0 Service Pack 2 when installed on Microsoft Windows Server 2003 for Itanium-based Systems Service Pack 2 (2972214)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 2.0 Service Pack 2 on Windows Vista Service Pack 2 (2974268)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 2.0 Service Pack 2 on Windows Vista x64 Edition Service Pack 2 (2974268)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2 (2974268)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2 (2974268)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2 (2974268)	**Important** Denial of Service	**Important**
**Microsoft .NET Framework 3.0 Service Pack 2**
Microsoft .NET Framework 3.0 Service Pack 2 when installed on Windows Server 2003 Service Pack 2 (2973115)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 3.0 Service Pack 2 when installed on Windows Server 2003 x64 Edition Service Pack 2 (2973115)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 3.0 Service Pack 2 on Windows Vista Service Pack 2 (2974269)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 3.0 Service Pack 2 on Windows Vista x64 Edition Service Pack 2 (2974269)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2 (2974269)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2 (2974269)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for Itanium-based Systems Service Pack 2 (2974269)	**Important** Denial of Service	**Important**
**Microsoft .NET Framework 3.5**
Microsoft .NET Framework 3.5 on Windows 8 for 32-bit Systems (2972212)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 3.5 on Windows 8 for 32-bit Systems (2973113)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 3.5 on Windows 8 for x64-based Systems (2972212)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 3.5 on Windows 8 for x64-based Systems (2973113)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 3.5 on Windows Server 2012 (2972212)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 3.5 on Windows Server 2012 (Server Core installation) (2972212)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 3.5 on Windows Server 2012 (2973113)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 3.5 on Windows Server 2012 (Server Core installation) (2973113)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 3.5 on Windows 8.1 for 32-bit Systems (2972213)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 3.5 on Windows 8.1 for 32-bit Systems (2973114)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 3.5 on Windows 8.1 for x64-based Systems (2972213)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 3.5 on Windows 8.1 for x64-based Systems (2973114)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 3.5 on Windows Server 2012 R2 (2972213)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 3.5 on Windows Server 2012 R2 (Server Core installation) (2972213)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 3.5 on Windows Server 2012 R2 (2973114)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 3.5 on Windows Server 2012 R2 (Server Core installation) (2973114)	**Important** Denial of Service	**Important**
**Microsoft .NET Framework 3.5.1**
Microsoft .NET Framework 3.5.1 on Windows 7 for 32-bit Systems Service Pack 1 (2972211)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 3.5.1 on Windows 7 for 32-bit Systems Service Pack 1 (2973112)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 3.5.1 on Windows 7 for x64-based Systems Service Pack 1 (2972211)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 3.5.1 on Windows 7 for x64-based Systems Service Pack 1 (2973112)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (2972211)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) (2972211)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (2973112)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) (2973112)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for Itanium-based Systems Service Pack 1 (2972211)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for Itanium-based Systems Service Pack 1 (2973112)	**Important** Denial of Service	**Important**
**Microsoft .NET Framework 4**
Microsoft .NET Framework 4 when installed on Windows Server 2003 Service Pack 2 (2972215)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 4 when installed on Windows Server 2003 x64 Edition Service Pack 2 (2972215)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 4 when installed on Windows Server 2003 with SP2 for Itanium-based Systems (2972215)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 4 on Windows Vista Service Pack 2 (2972215)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 4 on Windows Vista x64 Edition Service Pack 2 (2972215)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 4 when installed on Windows Server 2008 for 32-bit Systems Service Pack 2 (2972215)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 4 when installed on Windows Server 2008 for x64-based Systems Service Pack 2 (2972215)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 4 when installed on Windows Server 2008 for Itanium-based Systems Service Pack 2 (2972215)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 4 when installed on Windows 7 for 32-bit Systems Service Pack 1 (2972215)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 4 when installed on Windows 7 for x64-based Systems Service Pack 1 (2972215)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 4 when installed on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (2972215)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 4 when installed on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) (2972215)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 4 when installed on Windows Server 2008 R2 for Itanium-based Systems Service Pack 1 (2972215)	**Important** Denial of Service	**Important**
**Microsoft .NET Framework 4.5/4.5.1/4.5.2**
Microsoft .NET Framework 4.5/4.5.1/4.5.2 when installed on Windows Vista Service Pack 2 (2972216)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 4.5/4.5.1/4.5.2 when installed on Windows Vista x64 Edition Service Pack 2 (2972216)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 4.5/4.5.1/4.5.2 when installed on Windows Server 2008 for 32-bit Systems Service Pack 2 (2972216)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 4.5/4.5.1/4.5.2 when installed on Windows Server 2008 for x64-based Systems Service Pack 2 (2972216)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 4.5/4.5.1/4.5.2 when installed on Windows 7 for 32-bit Systems Service Pack 1 (2972216)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 4.5/4.5.1/4.5.2 when installed on Windows 7 for x64-based Systems Service Pack 1 (2972216)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 4.5/4.5.1/4.5.2 when installed on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (2972216)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 4.5/4.5.1/4.5.2 when installed on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) (2972216)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 4.5/4.5.1/4.5.2 on Windows 8 for 32-bit Systems (2977766)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 4.5.1/4.5.2 on Windows 8.1 for 32-bit Systems (2977765)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 4.5/4.5.1/4.5.2 on Windows 8 for x64-based Systems (2977766)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 4.5.1/4.5.2 on Windows 8.1 for x64-based Systems (2977765)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 4.5/4.5.1/4.5.2 on Windows Server 2012 (2977766)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 4.5/4.5.1/4.5.2 on Windows Server 2012 (Server Core installation) (2977766)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 4.5.1/4.5.2 on Windows Server 2012 R2 (2977765)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 4.5.1/4.5.2 on Windows Server 2012 R2 (Server Core installation) (2977765)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 4.5/4.5.1/4.5.2 on Windows RT (2977766)	**Important** Denial of Service	**Important**
Microsoft .NET Framework 4.5.1/4.5.2 on Windows RT 8.1 (2977765)	**Important** Denial of Service	**Important**

.NET Framework Denial of Service Vulnerability - CVE-2014-4072

A denial of service vulnerability exists in the way that Microsoft .NET Framework handles specially crafted requests, causing a hash collision. An attacker who successfully exploited this vulnerability could send a small number of specially crafted requests to a .NET server, causing performance to degrade significantly enough to cause a denial of service condition.

To view this vulnerability as a standard entry in the Common Vulnerabilities and Exposures list, see CVE-2014-4072.

Mitigating Factors

Mitigation refers to a setting, common configuration, or general best-practice, existing in a default state, that could reduce the severity of exploitation of a vulnerability. The following mitigating factors may be helpful in your situation:

• By default, no WCF programs are installed when Microsoft .NET Framework is installed on any supported edition of Microsoft Windows. To be affected by the vulnerability, customers must manually install a .NET-enabled website, service, or program that uses Windows Communication Foundation (WCF).

Workarounds

Workaround refers to a setting or configuration change that does not correct the underlying vulnerability but would help block known attack vectors before you apply the update. Microsoft has tested the following workarounds and states in the discussion whether a workaround reduces functionality:

• Enable UseRandomizedStringHashAlgorithm application configuration runtime setting for desktop applications
  In developing desktop applications targeting .NET 4.5 and above, you can employ the <UseRandomizedStringHashAlgorithm> element to generate unique hash codes on a per-application-domain basis. This can reduce the number of collisions and improve the overall performance of insertions and lookups that use hash tables.

  For more information see the MSDN Developer Network entry, <UseRandomizedStringHashAlgorithm> Element.

Impact of workaround. This workaround is not compatible with ASP.NET applications and is not available in versions of .NET below Microsoft .NET Framework 4.5. The workaround should not be applied in either of these environments.

FAQ

What is the scope of the vulnerability?
This is a denial of service vulnerability.****This vulnerability allows for an unauthenticated attacker to degrade the performance of a .NET-enabled website, creating a denial of service condition.

What causes the vulnerability?
The vulnerability exists when Microsoft .NET Framework hashes specially crafted requests and inserts that data into a hash table, causing a hash collision. When many of these collisions are chained together, the performance of the hash table is greatly degraded, leading to the denial of service condition.

What might an attacker use the vulnerability to do?
An attacker could use this vulnerability to cause a denial of service attack and disrupt the availability of applications that use Microsoft .NET framework.

How could an attacker exploit the vulnerability?
To exploit this vulnerability, an unauthenticated attacker could send a small number of specially crafted requests to an affected .NET-enabled website, service, or program that uses Windows Communication Foundation (WCF), causing a denial of service condition.

What systems are primarily at risk from the vulnerability?
Servers running affected versions of Microsoft .NET Framework are primarily at risk from this vulnerability.

What does the update do?
The update addresses this vulnerability by correcting how Microsoft .NET Framework handles specially crafted requests.

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 Server 2003 (all editions)

Reference Table

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

Security update file names	For Microsoft .NET Framework 1.1 Service Pack 1 on all supported 32-bit editions of Windows Server 2003: WindowsServer2003-KB2972207-x86-ENU.exe
	For Microsoft .NET Framework 2.0 Service Pack 2 when installed on all supported 32-bit editions of Windows Server 2003: NDP20SP2-KB2972214-x86.exe
	For Microsoft .NET Framework 3.0 Service Pack 2 when installed on all supported 32-bit editions of Windows Server 2003: NDP30SP2-KB2973115-x86.exe
	For Microsoft .NET Framework 4 when installed on all supported 32-bit editions of Windows Server 2003: NDP40-KB2972215-x86.exe
	For Microsoft .NET Framework 2.0 Service Pack 2 when installed on all supported x64-based editions of Windows Server 2003: NDP20SP2-KB2972214-x64.exe
	For Microsoft .NET Framework 3.0 Service Pack 2 when installed on all supported x64-based editions of Windows Server 2003: NDP30SP2-KB2973115-x64.exe
	For Microsoft .NET Framework 4 when installed on all supported x64-based editions of Windows Server 2003: NDP40-KB2972215-x64.exe
	For Microsoft .NET Framework 2.0 Service Pack 2 when installed on all supported Itanium-based editions of Windows Server 2003: NDP20SP2-KB2972214-IA64.exe
	For Microsoft .NET Framework 4 when installed on all supported Itanium-based editions of Windows Server 2003: NDP40-KB2972215-IA64.exe
Installation switches	See Microsoft Knowledge Base Article 934307
Update Log File	For Microsoft .NET Framework 1.1 Service Pack 1 on Windows Server 2003 Service Pack 2: KB2972207.log
	For Microsoft .NET Framework 2.0 Service Pack 2: Microsoft .NET Framework 2.0-KB2972214_*-msi0.txt Microsoft .NET Framework 2.0-KB2972214_*.html
	For Microsoft .NET Framework 3.0 Service Pack 2: Microsoft .NET Framework 3.0-KB2973115_*-msi0.txt Microsoft .NET Framework 3.0-KB2973115_*.html
	For Microsoft .NET Framework 4: KB2972215_*_*-Microsoft .NET Framework 4 Client Profile-MSP0.txt KB2972215_*_*.html
Restart requirement	This update does not require a restart. The installer stops the required services, applies the update, and then restarts the services. However, if the required services cannot be stopped for any reason, or if required files are being used, this update will require a restart. If this behavior occurs, a message appears that advises you to restart.
Removal information	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 2990931
Registry key verification	For Microsoft .NET Framework 1.1 Service Pack 1 on all supported 32-bit editions of Windows Server 2003: HKEY_LOCAL_MACHINESOFTWAREMicrosoftUpdatesWindows Server 2003SP3KB2972207
	For Microsoft .NET Framework 2.0 Service Pack 2: HKEY_LOCAL_MACHINESOFTWAREMicrosoftUpdatesMicrosoft .NET Framework 2.0 Service Pack 2SP2KB2972214 'ThisVersionInstalled' = 'Y'
	For Microsoft .NET Framework 3.0 Service Pack 2: HKEY_LOCAL_MACHINESOFTWAREMicrosoftUpdatesMicrosoft .NET Framework 3.0 Service Pack 2SP2KB2973115 'ThisVersionInstalled' = 'Y'
	For Microsoft .NET Framework 4 when installed on all supported 32-bit editions of Windows Server 2003: HKEY_LOCAL_MACHINESOFTWAREMicrosoftUpdatesMicrosoft .NET Framework 4 Client ProfileKB2972215 'ThisVersionInstalled' = 'Y'
	For Microsoft .NET Framework 4 when installed on all supported x64-based editions of Windows Server 2003: HKEY_LOCAL_MACHINESOFTWAREWow6432NodeMicrosoftUpdatesMicrosoft .NET Framework 4 Client ProfileKB2972215 'ThisVersionInstalled' = 'Y'
	For Microsoft .NET Framework 4 when installed on all supported Itanium-based editions of Windows Server 2003: HKEY_LOCAL_MACHINESOFTWAREWow6432NodeMicrosoftUpdatesMicrosoft .NET Framework 4 Client ProfileKB2972215 'ThisVersionInstalled' = 'Y'

Windows Vista (all editions)

Reference Table

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

Security update file names	For Microsoft .NET Framework 2.0 Service Pack 2 on all supported 32-bit editions of Windows Vista: Windows6.0-KB2974268-x86.msu
	For Microsoft .NET Framework 3.0 Service Pack 2 on all supported 32-bit editions of Windows Vista: Windows6.0-KB2974269-x86.msu
	For Microsoft .NET Framework 4 when installed on all supported 32-bit editions of Windows Vista: NDP40-KB2972215-x86.exe
	For Microsoft .NET Framework 4.5/4.5.1/4.5.2 when installed on all supported 32-bit editions of Windows Vista: NDP45-KB2972216-x86.exe
	For Microsoft .NET Framework 2.0 Service Pack 2 on all supported x64-based editions of Windows Vista: Windows6.0-KB2974268-x64.msu
	For Microsoft .NET Framework 3.0 Service Pack 2 on all supported x64-based editions of Windows Vista: Windows6.0-KB2974269-x64.msu
	For Microsoft .NET Framework 4 when installed on all supported x64-based editions of Windows Vista: NDP40-KB2972215-x64.exe
	For Microsoft .NET Framework 4.5/4.5.1/4.5.2 when installed on all supported x64-based editions of Windows Vista: NDP45-KB2972216-x64.exe
Installation switches	See Microsoft Knowledge Base Article 2844699
Update log file	For Microsoft .NET Framework 2.0 Service Pack 2: Not applicable
	For Microsoft .NET Framework 3.0 Service Pack 2: Not applicable
	For Microsoft .NET Framework 4: KB2972215_*_*-Microsoft .NET Framework 4 Client Profile-MSP0.txt KB2972215_*_*.html
	For Microsoft .NET Framework 4.5/4.5.1/4.5.2: KB[nnnnnnn]_*_*-Microsoft .NET Framework [.NET target version]-MSP0.txt KB[nnnnnnn]_*_*.html
Restart requirement	This update does not require a restart. The installer stops the required services, applies the update, and then restarts the services. However, if the required services cannot be stopped for any reason, or if required files are being used, this update will require a restart. If this behavior occurs, a message appears that advises you to restart.
Removal information	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 2990931
Registry key verification	For Microsoft .NET Framework 2.0 Service Pack 2: Note A registry key does not exist to validate the presence of this update. Use WMI to detect for the presence of this update.
	For Microsoft .NET Framework 3.0 Service Pack 2: Note A registry key does not exist to validate the presence of this update. Use WMI to detect for the presence of this update.
	For Microsoft .NET Framework 4 when installed on all supported 32-bit editions of Windows Vista: HKEY_LOCAL_MACHINESOFTWAREMicrosoftUpdatesMicrosoft .NET Framework 4 Client ProfileKB2972215 'ThisVersionInstalled' = 'Y'
	For Microsoft .NET Framework 4 when installed on all supported x64-based editions of Windows Vista: HKEY_LOCAL_MACHINESOFTWAREWow6432NodeMicrosoftUpdatesMicrosoft .NET Framework 4 Client ProfileKB2972215 'ThisVersionInstalled' = 'Y'
	For Microsoft .NET Framework 4.5/4.5.1/4.5.2: HKEY_LOCAL_MACHINESOFTWAREMicrosoftUpdatesMicrosoft .NET Framework [.NET target version]KB[nnnnnnn] 'ThisVersionInstalled' = 'Y' HKEY_LOCAL_MACHINESOFTWAREMicrosoftUpdatesMicrosoft .NET Framework [.NET target version]KB[nnnnnnn] 'ThisVersionInstalled' = 'Y'

Windows Server 2008 (all editions)

Reference Table

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

Security update file names	For Microsoft .NET Framework 2.0 Service Pack 2 on all supported 32-bit editions of Windows Server 2008 Service Pack 2: Windows6.0-KB2974268-x86.msu
	For Microsoft .NET Framework 3.0 Service Pack 2 on all supported 32-bit editions of Windows Server 2008 Service Pack 2: Windows6.0-KB2974269-x86.msu
	For Microsoft .NET Framework 4 when installed on all supported 32-bit editions of Windows Server 2008 Service Pack 2: NDP40-KB2972215-x86.exe
	For Microsoft .NET Framework 4.5/4.5.1/4.5.2 when installed on all supported 32-bit editions of Windows Server 2008 Service Pack 2: NDP45-KB2972216-x86.exe
	For Microsoft .NET Framework 2.0 Service Pack 2 on all supported x64-based editions of Windows Server 2008 Service Pack 2: Windows6.0-KB2974268-x64.msu
	For Microsoft .NET Framework 3.0 Service Pack 2 on all supported x64-based editions of Windows Server 2008 Service Pack 2: Windows6.0-KB2974269-x64.msu
	For Microsoft .NET Framework 4 when installed on all supported x64-based editions of Windows Server 2008 Service Pack 2: NDP40-KB2972215-x64.exe
	For Microsoft .NET Framework 4.5/4.5.1/4.5.2 on all supported x64-based editions of Windows Server 2008 Service Pack 2: NDP45-KB2972216-x64.exe
	For Microsoft .NET Framework 2.0 Service Pack 2 on all supported Itanium-based editions of Windows Server 2008: Windows6.0-KB2974268-ia64.msu
	For Microsoft .NET Framework 3.0 Service Pack 2 on all supported Itanium-based editions of Windows Server 2008: Windows6.0-KB2974269-ia64.msu
	For Microsoft .NET Framework 4 when installed on Windows Server 2008 for Itanium-based Systems Service Pack 2: NDP40-KB2972215-IA64.exe
Installation switches	See Microsoft Knowledge Base Article 2844699
Update log file	For Microsoft .NET Framework 2.0 Service Pack 2: Not applicable
	For Microsoft .NET Framework 3.0 Service Pack 2: Not applicable
	For Microsoft .NET Framework 4: KB2972215_*_*-Microsoft .NET Framework 4 Client Profile-MSP0.txt KB2972215_*_*.html
	For Microsoft .NET Framework 4.5/4.5.1/4.5.2: KB[nnnnnnn]_*_*-Microsoft .NET Framework [.NET target version]-MSP0.txt KB[nnnnnnn]_*_*.html
Restart requirement	This update does not require a restart. The installer stops the required services, applies the update, and then restarts the services. However, if the required services cannot be stopped for any reason, or if required files are being used, this update will require a restart. If this behavior occurs, a message appears that advises you to restart.
Removal information	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 2990931
Registry key verification	For Microsoft .NET Framework 2.0 Service Pack 2: Note A registry key does not exist to validate the presence of this update. Use WMI to detect for the presence of this update.
	For Microsoft .NET Framework 3.0 Service Pack 2: Note A registry key does not exist to validate the presence of this update. Use WMI to detect for the presence of this update.
	For Microsoft .NET Framework 4 when installed on all supported 32-bit editions of Windows Server 2008: HKEY_LOCAL_MACHINESOFTWAREMicrosoftUpdatesMicrosoft .NET Framework 4 Client ProfileKB2972215 'ThisVersionInstalled' = 'Y'
	For Microsoft .NET Framework 4 when installed on all supported x64-based editions of Windows Server 2008: HKEY_LOCAL_MACHINESOFTWAREWow6432NodeMicrosoftUpdatesMicrosoft .NET Framework 4 Client ProfileKB2972215 'ThisVersionInstalled' = 'Y'
	For Microsoft .NET Framework 4 when installed on all supported Itanium-based editions of Windows Server 2008: HKEY_LOCAL_MACHINESOFTWAREWow6432NodeMicrosoftUpdatesMicrosoft .NET Framework 4 Client ProfileKB2972215 'ThisVersionInstalled' = 'Y'
	For Microsoft .NET Framework 4.5/4.5.1/4.5.2: HKEY_LOCAL_MACHINESOFTWAREMicrosoftUpdatesMicrosoft .NET Framework [.NET target version]KB[nnnnnnn] 'ThisVersionInstalled' = 'Y' HKEY_LOCAL_MACHINESOFTWAREMicrosoftUpdatesMicrosoft .NET Framework [.NET target version]KB[nnnnnnn] 'ThisVersionInstalled' = 'Y'

Windows 7 (all editions)

Reference Table

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.
Security update file name	For Microsoft .NET Framework 3.5.1 on all supported 32-bit editions of Windows 7 Service Pack 1: Windows6.1-KB2972211-x86.msu Windows6.1-KB2973112-x86.msu
	For Microsoft .NET Framework 4 when installed on all supported 32-bit editions of Windows 7 Service Pack 1: NDP40-KB2972215-x86.exe
	For Microsoft .NET Framework 4.5/4.5.1/4.5.2 when installed on all supported 32-bit editions of Windows 7 Service Pack 1: NDP45-KB2972216-x86.exe
	For Microsoft .NET Framework 3.5.1 on all supported x64-based editions of Windows 7 Service Pack 1: Windows6.1-KB2972211-x64.msu Windows6.1-KB2973112-x64.msu
	For Microsoft .NET Framework 4 when installed on all supported x64-based editions of Windows 7 Service Pack 1: NDP40-KB2972215-x64.exe
	For Microsoft .NET Framework 4.5/4.5.1/4.5.2 when installed on all supported x64-based editions of Windows 7 Service Pack 1: NDP45-KB2972216-x64.exe
Installation switches	See Microsoft Knowledge Base Article 2844699
Update log file	For Microsoft .NET Framework 3.5.1: Not applicable.
	For Microsoft .NET Framework 4: KB2972215_*_*-Microsoft .NET Framework 4 Client Profile-MSP0.txt KB2972215_*_*.html
	For Microsoft .NET Framework 4.5/4.5.1/4.5.2: KB[nnnnnnn]_*_*-Microsoft .NET Framework [.NET target version]-MSP0.txt KB[nnnnnnn]_*_*.html
Restart requirement	This update does not require a restart. The installer stops the required services, applies the update, and then restarts the services. However, if the required services cannot be stopped for any reason, or if required files are being used, this update will require a restart. If this behavior occurs, a message appears that advises you to restart.
Removal information	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 2990931
Registry key verification	For Microsoft .NET Framework 3.5.1: Note A registry key does not exist to validate the presence of this update. Use WMI to detect for the presence of this update.
	For Microsoft .NET Framework 4 when installed on all supported 32-bit editions of Windows 7: HKEY_LOCAL_MACHINESOFTWAREMicrosoftUpdatesMicrosoft .NET Framework 4 Client ProfileKB2972215 'ThisVersionInstalled' = 'Y'
	For Microsoft .NET Framework 4 when installed on all supported x64-based editions of Windows 7: HKEY_LOCAL_MACHINESOFTWAREWow6432NodeMicrosoftUpdatesMicrosoft .NET Framework 4 Client ProfileKB2972215 'ThisVersionInstalled' = 'Y'
	For Microsoft .NET Framework 4.5/4.5.1/4.5.2: HKEY_LOCAL_MACHINESOFTWAREMicrosoftUpdatesMicrosoft .NET Framework [.NET target version]KB[nnnnnnn] 'ThisVersionInstalled' = 'Y' HKEY_LOCAL_MACHINESOFTWAREMicrosoftUpdatesMicrosoft .NET Framework [.NET target version]KB[nnnnnnn] 'ThisVersionInstalled' = 'Y'

Windows Server 2008 R2 (all editions)

Reference Table

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.
Security update file name	For Microsoft .NET Framework 3.5.1 on all supported x64-based editions of Windows Server 2008 R2 Service Pack 1: Windows6.1-KB2972211-x64.msu Windows6.1-KB2973112-x64.msu
	For Microsoft .NET Framework 4 when installed on all supported x64-based editions of Windows Server 2008 R2 Service Pack 1: NDP40-KB2972215-x64.exe
	For Microsoft .NET Framework 4.5/4.5.1/4.5.2 when installed on all supported x64-based editions of Windows Server 2008 R2 Service Pack 1: NDP45-KB2972216-x64.exe
	For Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for Itanium-based Systems Service Pack 1: Windows6.1-KB2972211-ia64.msu Windows6.1-KB2973112-ia64.msu
	For Microsoft .NET Framework 4 when installed on Windows Server 2008 R2 for Itanium-based Systems Service Pack 1: NDP40-KB2972215-IA64.exe
Installation switches	See Microsoft Knowledge Base Article 2844699
Update log file	For Microsoft .NET Framework 3.5.1: Not applicable
	For Microsoft .NET Framework 4: KB2972215_*_*-Microsoft .NET Framework 4 Client Profile-MSP0.txt KB2972215_*_*.html
	For Microsoft .NET Framework 4.5/4.5.1/4.5.2: KB[nnnnnnn]_*_*-Microsoft .NET Framework [.NET target version]-MSP0.txt KB[nnnnnnn]_*_*.html
Restart requirement	This update does not require a restart. The installer stops the required services, applies the update, and then restarts the services. However, if the required services cannot be stopped for any reason, or if required files are being used, this update will require a restart. If this behavior occurs, a message appears that advises you to restart.
Removal information	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 2990931
Registry key verification	For Microsoft .NET Framework 3.5.1: Note A registry key does not exist to validate the presence of this update. Use WMI to detect for the presence of this update.
	For Microsoft .NET Framework 4: HKEY_LOCAL_MACHINESOFTWAREWow6432NodeMicrosoftUpdatesMicrosoft .NET Framework 4 Client ProfileKB2972215 'ThisVersionInstalled' = 'Y'
	For Microsoft .NET Framework 4.5/4.5.1/4.5.2: HKEY_LOCAL_MACHINESOFTWAREMicrosoftUpdatesMicrosoft .NET Framework [.NET target version]KB[nnnnnnn] 'ThisVersionInstalled' = 'Y' HKEY_LOCAL_MACHINESOFTWAREMicrosoftUpdatesMicrosoft .NET Framework [.NET target version]KB[nnnnnnn] 'ThisVersionInstalled' = 'Y'

Windows 8 and Windows 8.1 (all editions)

Reference Table

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.
Security update file name	For Microsoft .NET Framework 3.5 on Windows 8 for 32-bit Systems: Windows8-RT-KB2972212-x86.msu Windows8-RT-KB2973113-x86.msu
	For Microsoft .NET Framework 4.5/4.5.1/4.5.2 on Windows 8 for 32-bit Systems: Windows8-RT-KB2977766-x86.msu
	For Microsoft .NET Framework 3.5 on Windows 8 for x64-based Systems: Windows8-RT-KB2972212-x64.msu Windows8-RT-KB2973113-x64.msu
	For Microsoft .NET Framework 4.5/4.5.1/4.5.2 on Windows 8 for x64-based Systems: Windows8-RT-KB2977766-x64.msu
	For Microsoft .NET Framework 3.5 on Windows 8.1 for 32-bit Systems: Windows8.1-KB2972213-x86.msu Windows8.1-KB2973114-x86.msu
	For Microsoft .NET Framework 4.5.1/4.5.2 on Windows 8.1 for 32-bit Systems: Windows8.1-KB2977765-x86.msu
	For Microsoft .NET Framework 3.5 on Windows 8.1 for x64-based Systems: Windows8.1-KB2972213-x64.msu Windows8.1-KB2973114-x64.msu
	For Microsoft .NET Framework 4.5.1/4.5.2 on Windows 8.1 for x64-based Systems: Windows8.1-KB2977765-x64.msu
Installation switches	See Microsoft Knowledge Base Article 2844699
Restart requirement	This update does not require a restart. The installer stops the required services, applies the update, and then restarts the services. However, if the required services cannot be stopped for any reason, or if required files are being used, this update will require a restart. If this behavior occurs, a message appears that advises you to restart.
Removal information	Click Control Panel, click System and Security, and then under Windows Update, click View update history and select from the list of updates.
File information	See Microsoft Knowledge Base Article 2990931
Registry key verification	For Microsoft .NET Framework 3.5: Note A registry key does not exist to validate the presence of this update. Use WMI to detect for the presence of this update.
	For Microsoft .NET Framework 4.5/4.5.1/4.5.2: Note A registry key does not exist to validate the presence of this update. Use WMI to detect for 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.

Inclusion in Future Service Packs	The update for this issue will be included in a future service pack or update rollup.
Security update file name	For Microsoft .NET Framework 3.5 on Windows Server 2012: Windows8-RT-KB2972212-x64.msu Windows8-RT-KB2973113-x64.msu
	For Microsoft .NET Framework 4.5/4.5.1/4.5.2 on Windows Server 2012: Windows8-RT-KB2977766-x64.msu
	For Microsoft .NET Framework 3.5 on Windows Server 2012 R2: Windows8.1-KB2972213-x64.msu Windows8.1-KB2973114-x64.msu
	For Microsoft .NET Framework 4.5.1/4.5.2 on Windows Server 2012 R2: Windows8.1-KB2977765-x64.msu
Installation switches	See Microsoft Knowledge Base Article 2844699
Restart requirement	This update does not require a restart. The installer stops the required services, applies the update, and then restarts the services. However, if the required services cannot be stopped for any reason, or if required files are being used, this update will require a restart. If this behavior occurs, a message appears that advises you to restart.
Removal information	Click Control Panel, click System and Security, and then under Windows Update, click View update history and select from the list of updates.
File information	See Microsoft Knowledge Base Article 2990931
Registry key verification	Note A registry key does not exist to validate the presence of this update. Use WMI to detect for 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	For Microsoft .NET Framework 4.5/4.5.1/4.5.2 on Windows RT: The 2977766 update is available via Windows Update.
	For Microsoft .NET Framework 4.5.1/4.5.2 on Windows RT 8.1: The 2977765 update is available via Windows Update.
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 2990931

Acknowledgments --------------- Microsoft [thanks](http://go.microsoft.com/fwlink/?linkid=21127) the following for working with us to help protect customers: - Alexander Klink of n.runs AG for reporting the .NET Framework Denial of Service Vulnerability (CVE-2014-4072) 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 (September 9, 2014): Bulletin published. - V1.1 (September 17, 2014): Bulletin revised to clarify language in the Executive Summary, Mitigating Factors, and Vulnerability FAQ sections that describes the attack vector for CVE-2014-4072. This is an informational change only. Customers who have already successfully installed the update do not have to take any action. *Page generated 2014-10-15 17:15Z-07:00.*