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Microsoft Security Bulletin MS10-041 - Important

Vulnerability in Microsoft .NET Framework Could Allow Tampering (981343)

Published: | Updated:

Version: 1.4

General Information

Executive Summary

This security update resolves a publicly disclosed vulnerability in Microsoft .NET Framework. The vulnerability could allow data tampering of signed XML content without being detected. In custom applications, the security impact depends on how the signed content is used in the specific application. Scenarios in which signed XML messages are transmitted over a secure channel (such as SSL) are not affected by this vulnerability.

This security update is rated Important for all affected releases of Microsoft .NET Framework for Microsoft Windows 2000, Windows XP, Windows Server 2003, Windows Vista, Windows Server 2008, Windows 7, and Windows Server 2008 R2. For more information, see the subsection, Affected and Non-Affected Software, in this section.

The security update addresses the vulnerability by changing the way in which the XMLDsig recommendation has been implemented in the Microsoft .NET Framework. 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. The majority of 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 981343 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, visit Microsoft Support Lifecycle.

Affected Software

Operating SystemComponentMaximum Security ImpactAggregate Severity RatingBulletins Replaced by this Update
Microsoft Windows 2000
Microsoft Windows 2000 Service Pack 4Microsoft .NET Framework 1.1 Service Pack 1
(KB979906)
TamperingImportantMS09-061
Microsoft Windows 2000 Service Pack 4Microsoft .NET Framework 2.0 Service Pack 2
(KB979909)
TamperingImportantNone
Windows XP
Windows XP Service Pack 2Microsoft .NET Framework 1.0 Service Pack 3
(KB979904)

(Windows XP Media Center Edition 2005 only)

TamperingImportantNone
Windows XP Service Pack 3Microsoft .NET Framework 1.0 Service Pack 3
(KB979904)

(Windows XP Media Center Edition 2005 and Windows XP Tablet PC Edition 2005 only)

TamperingImportantNone
Windows XP Service Pack 2 and Windows XP Service Pack 3Microsoft .NET Framework 1.1 Service Pack 1
(KB979906)

TamperingImportantMS09-061
Windows XP Service Pack 2 and Windows XP Service Pack 3Microsoft .NET Framework 3.5
(KB982865)

Microsoft .NET Framework 2.0 Service Pack 2 and Microsoft .NET Framework 3.5 Service Pack 1
(KB979909)
TamperingImportantNone
Windows XP Professional x64 Edition Service Pack 2Microsoft .NET Framework 1.1 Service Pack 1
(KB979906)
TamperingImportantMS09-061
Windows XP Professional x64 Edition Service Pack 2Microsoft .NET Framework 3.5
(KB982865)

Microsoft .NET Framework 2.0 Service Pack 2 and Microsoft .NET Framework 3.5 Service Pack 1
(KB979909)
TamperingImportantNone
Windows Server 2003
Windows Server 2003 Service Pack 2Microsoft .NET Framework 1.1 Service Pack 1
(KB979907)

Microsoft .NET Framework 3.5
(KB982865)

Microsoft .NET Framework 2.0 Service Pack 2 and Microsoft .NET Framework 3.5 Service Pack 1
(KB979909)
TamperingImportantNone
Windows Server 2003 x64 Edition Service Pack 2Microsoft .NET Framework 1.1 Service Pack 1
(KB979906)
TamperingImportantMS09-061
Windows Server 2003 x64 Edition Service Pack 2Microsoft .NET Framework 3.5
(KB982865)

Microsoft .NET Framework 2.0 Service Pack 2 and Microsoft .NET Framework 3.5 Service Pack 1
(KB979909)
TamperingImportantNone
Windows Server 2003 with SP2 for Itanium-based SystemsMicrosoft .NET Framework 1.1 Service Pack 1
(KB979906)
TamperingImportantMS09-061
Windows Server 2003 with SP2 for Itanium-based SystemsMicrosoft .NET Framework 3.5
(KB982865)

Microsoft .NET Framework 2.0 Service Pack 2 and Microsoft .NET Framework 3.5 Service Pack 1
(KB979909)
TamperingImportantNone
Windows Vista
Windows Vista Service Pack 1 and Windows Vista Service Pack 2Microsoft .NET Framework 1.1 Service Pack 1
(KB979906)
TamperingImportantMS09-061
Windows Vista Service Pack 1Microsoft .NET Framework 2.0 Service Pack 1 and Microsoft .NET Framework 3.5
(KB979913)
TamperingImportantMS09-036
Windows Vista Service Pack 1Microsoft .NET Framework 2.0 Service Pack 2 and Microsoft .NET Framework 3.5 Service Pack 1
(KB979911)
TamperingImportantNone
Windows Vista Service Pack 2Microsoft .NET Framework 2.0 Service Pack 2 and Microsoft .NET Framework 3.5 Service Pack 1
(KB979910)
TamperingImportantNone
Windows Vista x64 Edition Service Pack 1 and Windows Vista x64 Edition Service Pack 2Microsoft .NET Framework 1.1 Service Pack 1
(KB979906)
TamperingImportantMS09-061
Windows Vista x64 Edition Service Pack 1Microsoft .NET Framework 2.0 Service Pack 1 and Microsoft .NET Framework 3.5
(KB979913)
TamperingImportantMS09-036
Windows Vista x64 Edition Service Pack 1Microsoft .NET Framework 2.0 Service Pack 2 and Microsoft .NET Framework 3.5 Service Pack 1
(KB979911)
TamperingImportantNone
Windows Vista x64 Edition Service Pack 2 Microsoft .NET Framework 2.0 Service Pack 2 and Microsoft .NET Framework 3.5 Service Pack 1
(KB979910)
TamperingImportantNone
Windows Server 2008
Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit Systems Service Pack 2Microsoft .NET Framework 1.1 Service Pack 1**
(KB979906)
TamperingImportantMS09-061
Windows Server 2008 for 32-bit SystemsMicrosoft .NET Framework 2.0 Service Pack 1 and Microsoft .NET Framework 3.5**
(KB979913)
TamperingImportantMS09-036
Windows Server 2008 for 32-bit SystemsMicrosoft .NET Framework 2.0 Service Pack 2 and Microsoft .NET Framework 3.5 Service Pack 1**
(KB979911)
TamperingImportantNone
Windows Server 2008 for 32-bit Systems Service Pack 2Microsoft .NET Framework 2.0 Service Pack 2 and Microsoft .NET Framework 3.5 Service Pack 1**
(KB979910)
TamperingImportantNone
Windows Server 2008 for x64-based Systems and Windows Server 2008 for x64-based Systems Service Pack 2Microsoft .NET Framework 1.1 Service Pack 1**
(KB979906)
TamperingImportantMS09-061
Windows Server 2008 for x64-based SystemsMicrosoft .NET Framework 2.0 Service Pack 1 and Microsoft .NET Framework 3.5**
(KB979913)
TamperingImportantMS09-036
Windows Server 2008 for x64-based SystemsMicrosoft .NET Framework 2.0 Service Pack 2 and Microsoft .NET Framework 3.5 Service Pack 1**
(KB979911)
TamperingImportantNone
Windows Server 2008 for x64-based Systems Service Pack 2Microsoft .NET Framework 2.0 Service Pack 2 and Microsoft .NET Framework 3.5 Service Pack 1**
(KB979910)
TamperingImportantNone
Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for Itanium-based Systems Service Pack 2Microsoft .NET Framework 1.1 Service Pack 1
(KB979906)
TamperingImportantMS09-061
Windows Server 2008 for Itanium-based SystemsMicrosoft .NET Framework 2.0 Service Pack 1 and Microsoft .NET Framework 3.5
(KB979913)
TamperingImportantMS09-036
Windows Server 2008 for Itanium-based SystemsMicrosoft .NET Framework 2.0 Service Pack 2 and Microsoft .NET Framework 3.5 Service Pack 1
(KB979911)
TamperingImportantNone
Windows Server 2008 for Itanium-based Systems Service Pack 2Microsoft .NET Framework 2.0 Service Pack 2 and Microsoft .NET Framework 3.5 Service Pack 1
(KB979910)
TamperingImportantNone
Windows 7
Windows 7 for 32-bit SystemsMicrosoft .NET Framework 3.5.1
(KB979916)
TamperingImportantNone
Windows 7 for x64-based SystemsMicrosoft .NET Framework 3.5.1
(KB979916)
TamperingImportantNone
Windows Server 2008 R2
Windows Server 2008 R2 for x64-based SystemsMicrosoft .NET Framework 3.5.1*
(KB979916)
TamperingImportantNone
Windows Server 2008 R2 for Itanium-based SystemsMicrosoft .NET Framework 3.5.1
(KB979916)
TamperingImportantNone

*Server Core installation affected. This update applies, with the same severity rating, to supported editions of Windows Server 2008 R2 as indicated, whether or not installed using the Server Core installation option. For more information on this installation option, see the MSDN article, Server Core for Windows Server 2008 R2. Note that the Server Core installation option does not apply to certain editions of Windows Server 2008 R2; see Compare Server Core Installation Options.

**Server Core installation not affected. The vulnerabilities addressed by this update do not affect supported editions of Windows Server 2008 as indicated, when installed using the Server Core installation option. For more information on this installation option, see the MSDN article, Server Core. Note that the Server Core installation option does not apply to certain editions of Windows Server 2008; see Compare Server Core Installation Options.

Non-Affected Software

Operating SystemMicrosoft .NET Framework
All supported releases of Microsoft WindowsMicrosoft .NET Framework 3.0
All supported releases of Microsoft WindowsMicrosoft .NET Framework 3.0 Service Pack 1
All supported releases of Microsoft WindowsMicrosoft .NET Framework 3.0 Service Pack 2
Windows Vista Service Pack 2Microsoft .NET Framework 3.5
Windows Vista x64 Edition Service Pack 2Microsoft .NET Framework 3.5
Windows Server 2008 Service Pack 2Microsoft .NET Framework 3.5
Windows Server 2008 for x64-based Systems Service Pack 2Microsoft .NET Framework 3.5
Windows Server 2008 with SP2 for Itanium-based SystemsMicrosoft .NET Framework 3.5
All supported releases of Microsoft WindowsMicrosoft .NET Framework 4.0

Frequently Asked Questions (FAQ) Related to This Security Update

Vulnerability Information

Severity Ratings and Vulnerability Identifiers

XML Signature HMAC Truncation Authentication Bypass Vulnerability - CVE-2009-0217

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:

  • Arian Evans of WhiteHat Security for reporting the bypass issue in ASP.NET request validation that is addressed in this bulletin through a defense-in-depth change

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 visit the active protections Web sites provided by program partners, listed in Microsoft Active Protections Program (MAPP) Partners.

Support

  • Customers in the U.S. and Canada can receive technical support from Security Support or 1-866-PCSAFETY. There is no charge for support calls that are associated with security updates. For more information about available support options, see Microsoft Help and Support.
  • International customers can receive support from their local Microsoft subsidiaries. There is no charge for support that is associated with security updates. For more information about how to contact Microsoft for support issues, visit the International Support Web site.

Disclaimer

The information provided in the Microsoft Knowledge Base is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

Revisions

  • V1.0 (June 8, 2010): Bulletin published.
  • V1.1 (June 16, 2010): Corrected the registry key verification for Microsoft .NET Framework 2.0 Service Pack 2.
  • V1.2 (June 22, 2010): Revised this bulletin to announce a detection logic change to fix a Microsoft Baseline Security Analyzer (MBSA) issue with Microsoft .NET Framework 3.5. This is a detection change only that does not affect the files contained in the initial update. Customers who have successfully updated their systems do not need to reinstall this update.
  • V1.3 (June 30, 2010): Corrected the registry key verification for Microsoft .NET Framework 3.5 and Microsoft .NET Framework 2.0 Service Pack 2.
  • V1.4 (July 13, 2010): Revised this bulletin to announce an installation logic change to the updates for Microsoft .NET Framework 1.1 Service Pack 1 (KB979906) and Microsoft .NET Framework 2.0 Service Pack 2 and Microsoft .NET Framework 3.5 Service Pack 1 (KB979909). This is an installation logic change only that does not affect the update files contained in the initial update. Customers who have successfully updated their systems do not need to reinstall this update.