Microsoft Security Bulletin MS13-006 - Important

Vulnerability in Microsoft Windows Could Allow Security Feature Bypass (2785220)

Published: | Updated:

Version: 1.3

General Information

Executive Summary

This security update resolves a privately reported vulnerability in the implementation of SSL and TLS in Microsoft Windows. The vulnerability could allow security feature bypass if an attacker intercepts encrypted web traffic handshakes.

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, and Windows RT. 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 SSL provider component handles encrypted network packets. For more information about the vulnerability, see the Frequently Asked Questions (FAQ) subsection for the specific vulnerability entry under the next section, Vulnerability Information.

Recommendation. Most customers have automatic updating enabled and will not need to take any action because this security update will be downloaded and installed automatically. Customers who have not enabled automatic updating need to check for updates and install this update manually. For information about specific configuration options in automatic updating, see Microsoft Knowledge Base Article 294871.

For administrators and enterprise installations, or end users who want to install this security update manually, Microsoft recommends that customers apply the update at the earliest opportunity using update management software, or by checking for updates using the Microsoft Update service.

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

Known Issues. Microsoft Knowledge Base Article 2785220 documents the currently known issues that customers may experience when installing this security update. The article also documents recommended solutions for these issues.

Affected and Non-Affected Software

The following software have been tested to determine which versions or editions are affected. Other versions or editions are either past their support life cycle or are not affected. To determine the support life cycle for your software version or edition, see Microsoft Support Lifecycle.

Affected Software 

Operating SystemMaximum Security ImpactAggregate Severity RatingUpdates Replaced
Windows Vista
Windows Vista Service Pack 2
(KB2785220)
Security Feature BypassImportantNone
Windows Vista x64 Edition Service Pack 2
(KB2785220)
Security Feature BypassImportantNone
Windows Server 2008
Windows Server 2008 for 32-bit Systems Service Pack 2
(KB2785220)
Security Feature BypassImportantNone
Windows Server 2008 for x64-based Systems Service Pack 2
(KB2785220)
Security Feature BypassImportantNone
Windows Server 2008 for Itanium-based Systems Service Pack 2
(KB2785220)
Security Feature BypassImportantNone
Windows 7
Windows 7 for 32-bit Systems
(KB2785220)
Security Feature BypassImportantNone
Windows 7 for 32-bit Systems Service Pack 1
(KB2785220)
Security Feature BypassImportantNone
Windows 7 for x64-based Systems
(KB2785220)
Security Feature BypassImportantNone
Windows 7 for x64-based Systems Service Pack 1
(KB2785220)
Security Feature BypassImportantNone
Windows Server 2008 R2
Windows Server 2008 R2 for x64-based Systems
(KB2785220)
Security Feature BypassImportantNone
Windows Server 2008 R2 for x64-based Systems Service Pack 1
(KB2785220)
Security Feature BypassImportantNone
Windows Server 2008 R2 for Itanium-based Systems
(KB2785220)
Security Feature BypassImportantNone
Windows Server 2008 R2 for Itanium-based Systems Service Pack 1
(KB2785220)
Security Feature BypassImportantNone
Windows 8
Windows 8 for 32-bit Systems
(KB2785220)
Security Feature BypassImportantNone
Windows 8 for 64-bit Systems
(KB2785220)
Security Feature BypassImportantNone
Windows Server 2012
Windows Server 2012
(KB2785220)
Security Feature BypassImportantNone
Windows RT
Windows RT[1]
(KB2785220)
Security Feature BypassImportantNone
Server Core installation option
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
(KB2785220)
Security Feature BypassImportantNone
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
(KB2785220)
Security Feature BypassImportantNone
Windows Server 2008 R2 for x64-based Systems (Server Core installation)
(KB2785220)
Security Feature BypassImportantNone
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
(KB2785220)
Security Feature BypassImportantNone
Windows Server 2012 (Server Core installation)
(KB2785220)
Security Feature BypassImportantNone

[1]Windows RT security updates are provided via Windows Update.

 

Non-Affected Software

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

Frequently Asked Questions (FAQ) Related to This Security Update

Vulnerability Information

Severity Ratings and Vulnerability Identifiers

Microsoft SSL Version 3 and TLS Protocol Security Feature Bypass Vulnerability - CVE-2013-0013

Update Information

Detection and Deployment Tools and Guidance

Security Update Deployment

Other Information

Acknowledgments

Microsoft thanks the following for working with us to help protect customers:

  • Kenichiro Katayama for reporting the Microsoft SSL Version 3 and TLS Protocol Security Feature Bypass Vulnerability (CVE-2013-0013)

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.

Support

How to obtain help and support for this security update

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 (January 8, 2013): Bulletin published.
  • V1.1 (February 12, 2013): Added a link to Microsoft Knowledge Base Article 2785220 under Known Issues in the Executive Summary.
  • V1.2 (July 9, 2013): Bulletin revised to announce a detection change in the Windows Vista packages for the 2785220 update to correct a Windows Update reoffering issue. This is a detection change only. Customers who have already successfully updated their systems do not need to take any action.
  • V1.3 (December 16, 2013): Revised bulletin to announce a detection change to correct an offering issue for Windows RT (2785220). This is a detection change only. There were no changes to the update files. Customers who have successfully installed the update do not need to take any action.