DPAPI keys are not synchronized when you unlock a Windows 7-based or Windows Server 2008 R2-based computer

Article ID: 2695401 - View products that this article applies to.
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SYMPTOMS

Consider the following scenario:
  • You have two Windows 7-based or Windows Server 2008 R2-based computers (computer A and computer B) in an Active Directory domain environment.
  • Computer A has a credential provider whose GetSerialization function returns a custom authentication structure.
  • Computer A does not have a network connection and saves the credentials of a domain account in a cache.
  • You change the credentials for the domain account on computer B.
  • You log on to computer A by using the old credentials.
  • You lock computer A, and then unlock computer A by using the new credentials.
In this scenario, the Data Protection API (DPAPI) keys are not synchronized after you enter the new credentials. Therefore, you cannot decrypt information that was encrypted by using the DPAPI.

CAUSE

This issue occurs because the Lsass.exe process does not synchronize the DPAPI keys when you unlock the computer.

RESOLUTION

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft website:
http://support.microsoft.com/contactus/?ws=support
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

To apply this hotfix, you must be running one of the following operating systems:
  • Windows 7
  • Windows 7 Service Pack 1 (SP1)
  • Windows Server 2008 R2
  • Windows Server 2008 R2 Service Pack 1 (SP1)
For more information about how to obtain a Windows 7 or Windows Server 2008 R2 service pack, click the following article number to view the article in the Microsoft Knowledge Base:
976932 Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2

Registry information

To apply this hotfix, you do not have to make any changes to the registry.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

The global version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.
Windows 7 and Windows Server 2008 R2 file information notes
Important Windows 7 hotfixes and Windows Server 2008 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 7/Windows Server 2008 R2" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.
  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:
    Collapse this tableExpand this table
    VersionProductMilestoneService branch
    6.1.760 0.21xxxWindows 7 and Windows Server 2008 R2RTMLDR
    6.1.760 1.21xxxWindows 7 and Windows Server 2008 R2SP1LDR
  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows 7 and for Windows Server 2008 R2" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical to maintaining the state of the updated component. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.
For all supported x86-based versions of Windows 7
Collapse this tableExpand this table
File nameFile versionFile sizeDateTime
Cng.sys6.1.7600.21182369,35206-Apr-20127:00
Ksecdd.sys6.1.7600.2118267,44006-Apr-20127:03
Ksecpkg.sys6.1.7600.21182134,00006-Apr-20127:03
Lsasrv.dll6.1.7600.211821,037,82406-Apr-20126:54
Lsasrv.mofNot applicable13,78022-Jul-200923:19
Lsass.exe6.1.7600.2118222,52806-Apr-20126:51
Secur32.dll6.1.7600.2118222,01606-Apr-20126:56
Sspicli.dll6.1.7600.21182100,35206-Apr-20126:57
Sspisrv.dll6.1.7600.2118215,36006-Apr-20126:57
Cng.sys6.1.7601.21959369,35206-Apr-20127:45
Ksecdd.sys6.1.7601.2195967,44006-Apr-20127:52
Ksecpkg.sys6.1.7601.21959134,00006-Apr-20127:52
Lsasrv.dll6.1.7601.219591,038,84806-Apr-20127:39
Lsasrv.mofNot applicable13,78012-Nov-201023:53
Lsass.exe6.1.7601.2195922,52806-Apr-20127:36
Secur32.dll6.1.7601.2195922,01606-Apr-20127:41
Sspicli.dll6.1.7601.21959100,35206-Apr-20127:42
Sspisrv.dll6.1.7601.2195915,87206-Apr-20127:42
Schannel.dll6.1.7600.21182224,76806-Apr-20126:56
Schannel.dll6.1.7601.21959224,76806-Apr-20127:41
For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Cng.sys6.1.7600.21182460,29606-Apr-20127:56x64
Ksecdd.sys6.1.7600.2118295,60006-Apr-20128:00x64
Ksecpkg.sys6.1.7600.21182152,43206-Apr-20128:00x64
Lsasrv.dll6.1.7600.211821,445,88806-Apr-20127:41x64
Lsasrv.mofNot applicable13,78022-Jul-200923:34Not applicable
Lsass.exe6.1.7600.2118231,23206-Apr-20127:38x64
Secur32.dll6.1.7600.2118228,16006-Apr-20127:44x64
Sspicli.dll6.1.7600.21182136,19206-Apr-20127:45x64
Sspisrv.dll6.1.7600.2118228,67206-Apr-20127:45x64
Cng.sys6.1.7601.21959459,23206-Apr-20127:40x64
Ksecdd.sys6.1.7601.2195995,60006-Apr-20127:40x64
Ksecpkg.sys6.1.7601.21959152,43206-Apr-20127:40x64
Lsasrv.dll6.1.7601.219591,446,40006-Apr-20127:35x64
Lsasrv.mofNot applicable13,78012-Nov-201023:50Not applicable
Lsass.exe6.1.7601.2195931,23206-Apr-20127:31x64
Secur32.dll6.1.7601.2195928,16006-Apr-20127:37x64
Sspicli.dll6.1.7601.21959136,19206-Apr-20127:38x64
Sspisrv.dll6.1.7601.2195929,18406-Apr-20127:38x64
Schannel.dll6.1.7600.21182339,45606-Apr-20127:44x64
Schannel.dll6.1.7601.21959340,99206-Apr-20127:37x64
Lsasrv.mofNot applicable13,78022-Jul-200923:19Not applicable
Secur32.dll6.1.7600.2118222,01606-Apr-20126:56x86
Sspicli.dll6.1.7600.2118296,76806-Apr-20126:49x86
Lsasrv.mofNot applicable13,78012-Nov-201023:53Not applicable
Secur32.dll6.1.7601.2195922,01606-Apr-20127:41x86
Sspicli.dll6.1.7601.2195996,76806-Apr-20127:35x86
Schannel.dll6.1.7600.21182224,76806-Apr-20126:56x86
Schannel.dll6.1.7601.21959224,76806-Apr-20127:41x86
For all supported IA-64-based versions of Windows Server 2008 R2
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Cng.sys6.1.7600.21182787,50406-Apr-20126:29IA-64
Ksecdd.sys6.1.7600.21182179,56806-Apr-20126:34IA-64
Ksecpkg.sys6.1.7600.21182307,56806-Apr-20126:34IA-64
Lsasrv.dll6.1.7600.211822,655,23206-Apr-20126:25IA-64
Lsasrv.mofNot applicable13,78022-Jul-200923:59Not applicable
Lsass.exe6.1.7600.2118256,32006-Apr-20126:23IA-64
Secur32.dll6.1.7600.2118248,64006-Apr-20126:28IA-64
Sspicli.dll6.1.7600.21182275,45606-Apr-20126:28IA-64
Sspisrv.dll6.1.7600.2118245,56806-Apr-20126:28IA-64
Cng.sys6.1.7601.21959787,50406-Apr-20126:32IA-64
Ksecdd.sys6.1.7601.21959179,56806-Apr-20126:38IA-64
Ksecpkg.sys6.1.7601.21959307,56806-Apr-20126:38IA-64
Lsasrv.dll6.1.7601.219592,656,25606-Apr-20126:25IA-64
Lsasrv.mofNot applicable13,78012-Nov-201023:52Not applicable
Lsass.exe6.1.7601.2195956,32006-Apr-20126:21IA-64
Secur32.dll6.1.7601.2195948,64006-Apr-20126:28IA-64
Sspicli.dll6.1.7601.21959275,45606-Apr-20126:29IA-64
Sspisrv.dll6.1.7601.2195946,08006-Apr-20126:29IA-64
Schannel.dll6.1.7600.21182647,68006-Apr-20126:28IA-64
Schannel.dll6.1.7601.21959647,68006-Apr-20126:27IA-64
Lsasrv.mofNot applicable13,78022-Jul-200923:19Not applicable
Secur32.dll6.1.7600.2118222,01606-Apr-20126:56x86
Sspicli.dll6.1.7600.2118296,76806-Apr-20126:49x86
Lsasrv.mofNot applicable13,78012-Nov-201023:53Not applicable
Secur32.dll6.1.7601.2195922,01606-Apr-20127:41x86
Sspicli.dll6.1.7601.2195996,76806-Apr-20127:35x86
Schannel.dll6.1.7600.21182224,76806-Apr-20126:56x86
Schannel.dll6.1.7601.21959224,76806-Apr-20127:41x86

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

MORE INFORMATION

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates

Additional file information

Additional file information for Windows 7 and for Windows Server 2008 R2

Additional files for all supported x86-based versions of Windows 7
Collapse this tableExpand this table
File nameX86_6689039f3e439b621739e34ed83d8f39_31bf3856ad364e35_6.1.7600.21182_none_299980a1b81b8322.manifest
File versionNot applicable
File size1,040
Date (UTC)06-Apr-2012
Time (UTC)22:03
File nameX86_c4a47e62dd376b46a0ae1c9cae8cddcd_31bf3856ad364e35_6.1.7601.21959_none_91b70d7727b00457.manifest
File versionNot applicable
File size1,040
Date (UTC)06-Apr-2012
Time (UTC)22:03
File nameX86_microsoft-windows-lsa_31bf3856ad364e35_6.1.7600.21182_none_a6a76058d73f4398.manifest
File versionNot applicable
File size99,806
Date (UTC)06-Apr-2012
Time (UTC)7:42
File nameX86_microsoft-windows-lsa_31bf3856ad364e35_6.1.7601.21959_none_a8b558ecd446d6f7.manifest
File versionNot applicable
File size99,806
Date (UTC)06-Apr-2012
Time (UTC)8:29
File nameX86_microsoft-windows-security-schannel_31bf3856ad364e35_6.1.7600.21182_none_227320a4cfb6e223.manifest
File versionNot applicable
File size12,919
Date (UTC)06-Apr-2012
Time (UTC)7:53
File nameX86_microsoft-windows-security-schannel_31bf3856ad364e35_6.1.7601.21959_none_24811938ccbe7582.manifest
File versionNot applicable
File size12,919
Date (UTC)06-Apr-2012
Time (UTC)8:35
Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
Collapse this tableExpand this table
File nameAmd64_20ede3965b0d834ad4aa0b28a45d4455_31bf3856ad364e35_6.1.7601.21959_none_066b82aa31e621ad.manifest
File versionNot applicable
File size1,383
Date (UTC)06-Apr-2012
Time (UTC)22:03
File nameAmd64_53b48a5120153f000f961db4d02089cd_31bf3856ad364e35_6.1.7600.21182_none_d36f51c7f016cb9b.manifest
File versionNot applicable
File size1,046
Date (UTC)06-Apr-2012
Time (UTC)22:03
File nameAmd64_66daa51ae0bac9f4a6caf1fa023b21f3_31bf3856ad364e35_6.1.7600.21182_none_5baca0e584f6f84a.manifest
File versionNot applicable
File size709
Date (UTC)06-Apr-2012
Time (UTC)22:03
File nameAmd64_693224c90f05767651746b06afc845ee_31bf3856ad364e35_6.1.7600.21182_none_d3916fe469dc9264.manifest
File versionNot applicable
File size1,383
Date (UTC)06-Apr-2012
Time (UTC)22:03
File nameAmd64_6959058b7bc4b69673a0f3862b02b4ab_31bf3856ad364e35_6.1.7600.21182_none_089965b017ccfb69.manifest
File versionNot applicable
File size1,734
Date (UTC)06-Apr-2012
Time (UTC)22:03
File nameAmd64_6b84fb69e19998d9c085274eb7422965_31bf3856ad364e35_6.1.7601.21959_none_8d7d2d68ae1a1170.manifest
File versionNot applicable
File size1,734
Date (UTC)06-Apr-2012
Time (UTC)22:03
File nameAmd64_78a75ee47098413cc8272c687b58d342_31bf3856ad364e35_6.1.7601.21959_none_49b3c639d0f98b97.manifest
File versionNot applicable
File size709
Date (UTC)06-Apr-2012
Time (UTC)22:03
File nameAmd64_e365c0a44e17e02be2f01af716dd7fcd_31bf3856ad364e35_6.1.7601.21959_none_cd5a8842f330ac5e.manifest
File versionNot applicable
File size1,046
Date (UTC)06-Apr-2012
Time (UTC)22:03
File nameAmd64_microsoft-windows-lsa_31bf3856ad364e35_6.1.7600.21182_none_02c5fbdc8f9cb4ce.manifest
File versionNot applicable
File size99,810
Date (UTC)06-Apr-2012
Time (UTC)8:35
File nameAmd64_microsoft-windows-lsa_31bf3856ad364e35_6.1.7601.21959_none_04d3f4708ca4482d.manifest
File versionNot applicable
File size99,810
Date (UTC)06-Apr-2012
Time (UTC)8:55
File nameAmd64_microsoft-windows-security-schannel_31bf3856ad364e35_6.1.7600.21182_none_7e91bc2888145359.manifest
File versionNot applicable
File size12,921
Date (UTC)06-Apr-2012
Time (UTC)8:42
File nameAmd64_microsoft-windows-security-schannel_31bf3856ad364e35_6.1.7601.21959_none_809fb4bc851be6b8.manifest
File versionNot applicable
File size12,921
Date (UTC)06-Apr-2012
Time (UTC)9:00
File nameWow64_microsoft-windows-lsa_31bf3856ad364e35_6.1.7600.21182_none_0d1aa62ec3fd76c9.manifest
File versionNot applicable
File size86,382
Date (UTC)06-Apr-2012
Time (UTC)7:30
File nameWow64_microsoft-windows-lsa_31bf3856ad364e35_6.1.7601.21959_none_0f289ec2c1050a28.manifest
File versionNot applicable
File size86,382
Date (UTC)06-Apr-2012
Time (UTC)8:24
File nameWow64_microsoft-windows-security-schannel_31bf3856ad364e35_6.1.7600.21182_none_88e6667abc751554.manifest
File versionNot applicable
File size6,945
Date (UTC)06-Apr-2012
Time (UTC)7:29
File nameWow64_microsoft-windows-security-schannel_31bf3856ad364e35_6.1.7601.21959_none_8af45f0eb97ca8b3.manifest
File versionNot applicable
File size6,945
Date (UTC)06-Apr-2012
Time (UTC)8:23
Additional files for all supported IA-64-based versions of Windows Server 2008 R2
Collapse this tableExpand this table
File nameIa64_3a798d14bd3a6fa262a977b32dbcfea0_31bf3856ad364e35_6.1.7601.21959_none_00f61775c478e480.manifest
File versionNot applicable
File size1,731
Date (UTC)06-Apr-2012
Time (UTC)22:03
File nameIa64_a0a3404220d1eb1646bd35ad1f590230_31bf3856ad364e35_6.1.7600.21182_none_812b6103fcb21558.manifest
File versionNot applicable
File size1,731
Date (UTC)06-Apr-2012
Time (UTC)22:03
File nameIa64_microsoft-windows-lsa_31bf3856ad364e35_6.1.7600.21182_none_a6a9044ed73d4c94.manifest
File versionNot applicable
File size99,808
Date (UTC)06-Apr-2012
Time (UTC)10:06
File nameIa64_microsoft-windows-lsa_31bf3856ad364e35_6.1.7601.21959_none_a8b6fce2d444dff3.manifest
File versionNot applicable
File size99,808
Date (UTC)06-Apr-2012
Time (UTC)10:33
File nameIa64_microsoft-windows-security-schannel_31bf3856ad364e35_6.1.7600.21182_none_2274c49acfb4eb1f.manifest
File versionNot applicable
File size12,920
Date (UTC)06-Apr-2012
Time (UTC)10:10
File nameIa64_microsoft-windows-security-schannel_31bf3856ad364e35_6.1.7601.21959_none_2482bd2eccbc7e7e.manifest
File versionNot applicable
File size12,920
Date (UTC)06-Apr-2012
Time (UTC)10:37
File nameWow64_microsoft-windows-lsa_31bf3856ad364e35_6.1.7600.21182_none_0d1aa62ec3fd76c9.manifest
File versionNot applicable
File size86,382
Date (UTC)06-Apr-2012
Time (UTC)7:30
File nameWow64_microsoft-windows-lsa_31bf3856ad364e35_6.1.7601.21959_none_0f289ec2c1050a28.manifest
File versionNot applicable
File size86,382
Date (UTC)06-Apr-2012
Time (UTC)8:24
File nameWow64_microsoft-windows-security-schannel_31bf3856ad364e35_6.1.7600.21182_none_88e6667abc751554.manifest
File versionNot applicable
File size6,945
Date (UTC)06-Apr-2012
Time (UTC)7:29
File nameWow64_microsoft-windows-security-schannel_31bf3856ad364e35_6.1.7601.21959_none_8af45f0eb97ca8b3.manifest
File versionNot applicable
File size6,945
Date (UTC)06-Apr-2012
Time (UTC)8:23

Properties

Article ID: 2695401 - Last Review: May 15, 2012 - Revision: 3.0
APPLIES TO
  • Windows 7 Enterprise
  • Windows 7 Home Basic
  • Windows 7 Home Premium
  • Windows 7 Professional
  • Windows 7 Starter
  • Windows 7 Ultimate
  • Windows Server 2008 R2 Datacenter
  • Windows Server 2008 R2 Enterprise
  • Windows Server 2008 R2 for Itanium-Based Systems
  • Windows Server 2008 R2 Foundation
  • Windows Server 2008 R2 Standard
  • Windows Web Server 2008 R2
Keywords: 
kbexpertiseadvanced kbautohotfix kbqfe kbhotfixserver kbfix kbsurveynew KB2695401

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