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Microsoft Security Bulletin MS10-070 - Important

Vulnerability in ASP.NET Could Allow Information Disclosure (2418042)

Published: | Updated:

Version: 4.2

General Information

Executive Summary

This security update resolves a publicly disclosed vulnerability in ASP.NET. The vulnerability could allow information disclosure. An attacker who successfully exploited this vulnerability could read data, such as the view state, which was encrypted by the server. This vulnerability can also be used for data tampering, which, if successfully exploited, could be used to decrypt and tamper with the data encrypted by the server. Microsoft .NET Framework versions prior to Microsoft .NET Framework 3.5 Service Pack 1 are not affected by the file content disclosure portion of this vulnerability.

This security update is rated Important for all supported editions of ASP.NET except Microsoft .NET Framework 1.0 Service Pack 3. For more information, see the subsection, Affected and Non-Affected Software, in this section.

The security update addresses the vulnerability by additionally signing all data that is encrypted by ASP.NET. For more information about the vulnerability, see the Frequently Asked Questions (FAQ) subsection for the specific vulnerability entry under the next section, Vulnerability Information.

This security update also addresses the vulnerability first described in Microsoft Security Advisory 2416728.

Recommendation. Microsoft recommends that customers apply the update at the earliest opportunity.

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

Known Issues. Microsoft Knowledge Base Article 2418042 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
Windows XP
Windows XP Service Pack 3Microsoft .NET Framework 1.1 Service Pack 1
(KB2416447)
Information DisclosureImportantMS10-041
Windows XP Service Pack 3Microsoft .NET Framework 2.0 Service Pack 2 and Microsoft .NET Framework 3.5 Service Pack 1
(KB2418241)

Microsoft .NET Framework 3.5
(KB2416468)

Microsoft .NET Framework 3.5
(KB2418240)

Microsoft .NET Framework 3.5 Service Pack 1
(KB2416473)

Microsoft .NET Framework 4.0[1]
(KB2416472)
Information DisclosureImportantNone
Windows XP Professional x64 Edition Service Pack 2Microsoft .NET Framework 1.1 Service Pack 1
(KB2416447)
Information DisclosureImportantMS10-041
Windows XP Professional x64 Edition Service Pack 2Microsoft .NET Framework 2.0 Service Pack 2 and Microsoft .NET Framework 3.5 Service Pack 1
(KB2418241)

Microsoft .NET Framework 3.5
(KB2416468)

Microsoft .NET Framework 3.5
(KB2418240)

Microsoft .NET Framework 3.5 Service Pack 1
(KB2416473)

Microsoft .NET Framework 4.0[1]
(KB2416472)
Information DisclosureImportantNone
Windows Server 2003
Windows Server 2003 Service Pack 2Microsoft .NET Framework 1.1 Service Pack 1
(KB2416451)

Microsoft .NET Framework 2.0 Service Pack 2 and Microsoft .NET Framework 3.5 Service Pack 1
(KB2418241)

Microsoft .NET Framework 3.5
(KB2416468)

Microsoft .NET Framework 3.5
(KB2418240)

Microsoft .NET Framework 3.5 Service Pack 1
(KB2416473)

Microsoft .NET Framework 4.0[1]
(KB2416472)
Information DisclosureImportantNone
Windows Server 2003 x64 Edition Service Pack 2Microsoft .NET Framework 1.1 Service Pack 1
(KB2416447)
Information DisclosureImportantMS10-041
Windows Server 2003 x64 Edition Service Pack 2Microsoft .NET Framework 2.0 Service Pack 2 and Microsoft .NET Framework 3.5 Service Pack 1
(KB2418241)

Microsoft .NET Framework 3.5
(KB2416468)

Microsoft .NET Framework 3.5
(KB2418240)

Microsoft .NET Framework 3.5 Service Pack 1
(KB2416473)

Microsoft .NET Framework 4.0[1]
(KB2416472)
Information DisclosureImportantNone
Windows Server 2003 with SP2 for Itanium-based SystemsMicrosoft .NET Framework 1.1 Service Pack 1
(KB2416447)
Information DisclosureImportantMS10-041
Windows Server 2003 with SP2 for Itanium-based SystemsMicrosoft .NET Framework 2.0 Service Pack 2 and Microsoft .NET Framework 3.5 Service Pack 1
(KB2418241)

Microsoft .NET Framework 3.5
(KB2416468)

Microsoft .NET Framework 3.5
(KB2418240)

Microsoft .NET Framework 3.5 Service Pack 1
(KB2416473)

Microsoft .NET Framework 4.0[1]
(KB2416472)
Information DisclosureImportantNone
Windows Vista
Windows Vista Service Pack 1Microsoft .NET Framework 1.1 Service Pack 1
(KB2416447)

Microsoft .NET Framework 3.5
(KB2418240)

Microsoft .NET Framework 3.5 Service Pack 1
(KB2416473)

Microsoft .NET Framework 4.0[1]
(KB2416472)
Information DisclosureImportantNone
Windows Vista Service Pack 1Microsoft .NET Framework 2.0 Service Pack 1 and Microsoft .NET Framework 3.5
(KB2416469)

Microsoft .NET Framework 2.0 Service Pack 2 and Microsoft .NET Framework 3.5 Service Pack 1
(KB2416474)
Information DisclosureImportantMS09-036
Windows Vista Service Pack 2Microsoft .NET Framework 1.1 Service Pack 1
(KB2416447)

Microsoft .NET Framework 2.0 Service Pack 2, Microsoft .NET Framework 3.5, and Microsoft .NET Framework 3.5 Service Pack 1
(KB2416470)

Microsoft .NET Framework 3.5
(KB2418240)

Microsoft .NET Framework 3.5 Service Pack 1
(KB2416473)

Microsoft .NET Framework 4.0[1]
(KB2416472)
Information DisclosureImportantNone
Windows Vista x64 Edition Service Pack 1Microsoft .NET Framework 1.1 Service Pack 1
(KB2416447)

Microsoft .NET Framework 3.5
(KB2418240)

Microsoft .NET Framework 3.5 Service Pack 1
(KB2416473)

Microsoft .NET Framework 4.0[1]
(KB2416472)
Information DisclosureImportantNone
Windows Vista x64 Edition Service Pack 1Microsoft .NET Framework 2.0 Service Pack 1 and Microsoft .NET Framework 3.5
(KB2416469)

Microsoft .NET Framework 2.0 Service Pack 2 and Microsoft .NET Framework 3.5 Service Pack 1
(KB2416474)
Information DisclosureImportantMS09-036
Windows Vista x64 Edition Service Pack 2Microsoft .NET Framework 1.1 Service Pack 1
(KB2416447)

Microsoft .NET Framework 2.0 Service Pack 2, Microsoft .NET Framework 3.5, and Microsoft .NET Framework 3.5 Service Pack 1
(KB2416470)

Microsoft .NET Framework 3.5
(KB2418240)

Microsoft .NET Framework 3.5 Service Pack 1
(KB2416473)

Microsoft .NET Framework 4.0[1]
(KB2416472)
Information DisclosureImportantNone
Windows Server 2008
Windows Server 2008 for 32-bit SystemsMicrosoft .NET Framework 1.1 Service Pack 1**
(KB2416447)

Microsoft .NET Framework 3.5**
(KB2418240)

Microsoft .NET Framework 3.5 Service Pack 1**
(KB2416473)

Microsoft .NET Framework 4.0**[1]
(KB2416472)
Information DisclosureImportantNone
Windows Server 2008 for 32-bit SystemsMicrosoft .NET Framework 2.0 Service Pack 1 and Microsoft .NET Framework 3.5**
(KB2416469)

Microsoft .NET Framework 2.0 Service Pack 2 and Microsoft .NET Framework 3.5 Service Pack 1**
(KB2416474)
Information DisclosureImportantMS09-036
Windows Server 2008 for 32-bit Systems Service Pack 2Microsoft .NET Framework 1.1 Service Pack 1**
(KB2416447)

Microsoft .NET Framework 2.0 Service Pack 2, Microsoft .NET Framework 3.5, and Microsoft .NET Framework 3.5 Service Pack 1**
(KB2416470)

Microsoft .NET Framework 3.5**
(KB2418240)

Microsoft .NET Framework 3.5 Service Pack 1**
(KB2416473)

Microsoft .NET Framework 4.0**[1]
(KB2416472)
Information DisclosureImportantNone
Windows Server 2008 for x64-based SystemsMicrosoft .NET Framework 1.1 Service Pack 1**
(KB2416447)

Microsoft .NET Framework 3.5**
(KB2418240)

Microsoft .NET Framework 3.5 Service Pack 1**
(KB2416473)

Microsoft .NET Framework 4.0**[1]
(KB2416472)
Information DisclosureImportantNone
Windows Server 2008 for x64-based SystemsMicrosoft .NET Framework 2.0 Service Pack 1 and Microsoft .NET Framework 3.5**
(KB2416469)

Microsoft .NET Framework 2.0 Service Pack 2 and Microsoft .NET Framework 3.5 Service Pack 1**
(KB2416474)
Information DisclosureImportantMS09-036
Windows Server 2008 for x64-based Systems Service Pack 2Microsoft .NET Framework 1.1 Service Pack 1**
(KB2416447)

Microsoft .NET Framework 2.0 Service Pack 2, Microsoft .NET Framework 3.5, and Microsoft .NET Framework 3.5 Service Pack 1**
(KB2416470)

Microsoft .NET Framework 3.5**
(KB2418240)

Microsoft .NET Framework 3.5 Service Pack 1**
(KB2416473)

Microsoft .NET Framework 4.0**[1]
(KB2416472)
Information DisclosureImportantNone
Windows Server 2008 for Itanium-based SystemsMicrosoft .NET Framework 1.1 Service Pack 1
(KB2416447)

Microsoft .NET Framework 3.5
(KB2418240)

Microsoft .NET Framework 3.5 Service Pack 1
(KB2416473)

Microsoft .NET Framework 4.0[1]
(KB2416472)
Information DisclosureImportantNone
Windows Server 2008 for Itanium-based SystemsMicrosoft .NET Framework 2.0 Service Pack 1 and Microsoft .NET Framework 3.5
(KB2416469)

Microsoft .NET Framework 2.0 Service Pack 2 and Microsoft .NET Framework 3.5 Service Pack 1
(KB2416474)
Information DisclosureImportantMS09-036
Windows Server 2008 for Itanium-based Systems Service Pack 2Microsoft .NET Framework 1.1 Service Pack 1
(KB2416447)

Microsoft .NET Framework 2.0 Service Pack 2, Microsoft .NET Framework 3.5, and Microsoft .NET Framework 3.5 Service Pack 1
(KB2416470)

Microsoft .NET Framework 3.5
(KB2418240)

Microsoft .NET Framework 3.5 Service Pack 1
(KB2416473)

Microsoft .NET Framework 4.0[1]
(KB2416472)
Information DisclosureImportantNone
Windows 7
Windows 7 for 32-bit SystemsMicrosoft .NET Framework 3.5.1
(KB2416471)

Microsoft .NET Framework 4.0[1]
(KB2416472)
Information DisclosureImportantNone
Windows 7 for 32-bit Systems Service Pack 1Microsoft .NET Framework 4.0[1]
(KB2416472)
Information DisclosureImportantNone
Windows 7 for x64-based SystemsMicrosoft .NET Framework 3.5.1
(KB2416471)

Microsoft .NET Framework 4.0[1]
(KB2416472)
Information DisclosureImportantNone
Windows 7 for x64-based Systems Service Pack 1Microsoft .NET Framework 4.0[1]
(KB2416472)
Information DisclosureImportantNone
Windows Server 2008 R2
Windows Server 2008 R2 for x64-based SystemsMicrosoft .NET Framework 3.5.1*
(KB2416471)

Microsoft .NET Framework 4.0[1]
(KB2416472)
Information DisclosureImportantNone
Windows Server 2008 R2 for x64-based Systems Service Pack 1Microsoft .NET Framework 4.0*[1]
(KB2416472)
Information DisclosureImportantNone
Windows Server 2008 R2 for Itanium-based SystemsMicrosoft .NET Framework 3.5.1
(KB2416471)

Microsoft .NET Framework 4.0[1]
(KB2416472)
Information DisclosureImportantNone
Windows Server 2008 R2 for Itanium-based Systems Service Pack 1Microsoft .NET Framework 4.0[1]
(KB2416472)
Information DisclosureImportantNone

*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 TechNet articles, Managing a Server Core Installation and Servicing a Server Core Installation. Note that the Server Core installation option does not apply to certain editions of Windows Server 2008 and 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 TechNet articles, Managing a Server Core Installation and Servicing a Server Core Installation. Note that the Server Core installation option does not apply to certain editions of Windows Server 2008 and Windows Server 2008 R2; see Compare Server Core Installation Options.

[1].NET Framework 4.0 Client Profile not affected. The .NET Framework version 4 redistributable packages are available in two profiles: .NET Framework 4.0 and .NET Framework 4.0 Client Profile. The .NET Framework 4.0 Client Profile is a subset of the .NET Framework 4.0. The vulnerability addressed in this update affects only the .NET Framework 4.0 and not the .NET Framework 4.0 Client Profile. For more information, see: Installing the .NET Framework.

Non-Affected Software

Operating System Component
Microsoft .NET Framework 1.0 Service Pack 3
Windows XP Service Pack 3Microsoft .NET Framework 1.0 Service Pack 3
(Windows XP Media Center Edition 2005 and Windows XP Tablet PC Edition 2005 only)
Microsoft .NET Framework 3.5.1
Windows 7 for 32-bit Systems Service Pack 1Microsoft .NET Framework 3.5.1
Windows 7 for x64-based Systems Service Pack 1Microsoft .NET Framework 3.5.1
Windows Server 2008 R2 for x64-based Systems Service Pack 1Microsoft .NET Framework 3.5.1
Windows Server 2008 R2 for Itanium-based Systems Service Pack 1Microsoft .NET Framework 3.5.1

Frequently Asked Questions (FAQ) Related to This Security Update

Vulnerability Information

Severity Ratings and Vulnerability Identifiers

ASP.NET Padding Oracle Vulnerability - CVE-2010-3332

Update Information

Detection and Deployment Tools and Guidance

Security Update Deployment

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 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 (September 28, 2010): Bulletin published.
  • V2.0 (September 30, 2010): Revised this bulletin to announce that the updates are now available through all distribution channels, including Windows Update and Microsoft Update. Also added an update FAQ to describe additional clarifications and corrections to the bulletin.
  • V2.1 (October 13, 2010): Added three update FAQs to clarify affected software.
  • V2.2 (November 3, 2010): Added a note to the Affected Software table to clarify that the .NET Framework 4.0 Client Profile is not affected.
  • V3.0 (December 14, 2010): Added an update FAQ to announce that new update packages are available for .NET Framework 4.0 (KB2416472) to correct an issue in the setup that could interfere with the successful installation of other updates and/or products. Customers who have already successfully updated their systems do not need to take any action.
  • V4.0 (February 22, 2011): Announced a detection change to offer the Microsoft .NET Framework 4.0 (KB2416472) update packages to customers who install Microsoft .NET Framework 4.0 after installing Windows 7 for 32-bit Systems Service Pack 1, Windows 7 for x64-based Systems Service Pack 1, Windows Server 2008 R2 for x64-based Systems Service Pack 1, or Windows Server 2008 R2 for Itanium-based Systems Service Pack 1. Customers who have already successfully updated their systems do not need to take any action.
  • V4.1 (April 20, 2011): Corrected registry key verification for Microsoft .NET Framework 3.5 Service Pack 1 when installed on Windows XP and Windows Server 2003.
  • V4.2 (October 26, 2011): Corrected Server Core installation applicability for .NET Framework 4 on Windows Server 2008 R2 for x64-based Systems.