The contents of some Message Queuing messages may become corrupted when you enable message encryption in Windows 7 or in Windows Server 2008 R2

Applies to: Windows 7 EnterpriseWindows 7 ProfessionalWindows 7 Ultimate More

Symptoms


Consider the following scenario:
  • You enable Message Queuing (also known as MSMQ) 5.0 on a computer that is running Windows 7 or Windows Server 2008 R2.
  • You run an application that uses Message Queuing to transfer messages to a remote server. Additionally, you enable message encryption for Message Queuing to transfer messages.
  • Two or more queues are hosted on the same remote server.
In this scenario, the contents of the messages may become corrupted, and there is no notification.

Cause


The issue occurs because a race condition may occur when two threads use the same key to encrypt messages.

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: 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 have the Message Queuing feature installed on a computer that is 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)

Registry information

To use the hotfix in this package, 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:
    VersionProductMilestoneService branch
    6.1.760
    0.20xxx
    Windows 7 and Windows Server 2008 R2RTMLDR
    6.1.760
    1.21xxx
    Windows 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
File nameFile versionFile sizeDateTimePlatform
Mqqm.dll6.1.7600.20881934,40015-Jan-201105:33x86
Mqqm.dll6.1.7601.21642934,40015-Jan-201105:34x86
For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
File nameFile versionFile sizeDateTimePlatform
Mqqm.dll6.1.7600.208811,517,56815-Jan-201106:19x64
Mqqm.dll6.1.7601.216421,517,56815-Jan-201106:20x64
For all supported IA-64-based versions of Windows Server 2008 R2
File nameFile versionFile sizeDateTimePlatform
Mqqm.dll6.1.7600.208813,014,14415-Jan-201105:12IA-64
Mqqm.dll6.1.7601.216423,014,14415-Jan-201105:11IA-64

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 Message Queuing, visit the following Microsoft TechNet website:For more information about encryption for Message Queuing, visit the following Microsoft MSDN website: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
File nameUpdate.mum
File versionNot applicable
File size2,268
Date (UTC)15-Jan-2011
Time (UTC)15:19
PlatformNot applicable
File nameX86_466f2ba34db77b6364e6e89a696dcde1_31bf3856ad364e35_6.1.7600.20881_none_2608547683c86959.manifest
File versionNot applicable
File size710
Date (UTC)15-Jan-2011
Time (UTC)15:19
PlatformNot applicable
File nameX86_f65ca8c71305434c6617a547248ded92_31bf3856ad364e35_6.1.7601.21642_none_d0797a52c031b544.manifest
File versionNot applicable
File size710
Date (UTC)15-Jan-2011
Time (UTC)15:19
PlatformNot applicable
File nameX86_microsoft-windows-msmq-queuemanager-core_31bf3856ad364e35_6.1.7600.20881_none_8013dd02da0e69a6.manifest
File versionNot applicable
File size2,742
Date (UTC)15-Jan-2011
Time (UTC)06:09
PlatformNot applicable
File nameX86_microsoft-windows-msmq-queuemanager-core_31bf3856ad364e35_6.1.7601.21642_none_82267a02d7137f25.manifest
File versionNot applicable
File size2,742
Date (UTC)15-Jan-2011
Time (UTC)06:07
PlatformNot applicable
Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
File nameAmd64_0da74c86809a2217b1e40bdcf166eb85_31bf3856ad364e35_6.1.7600.20881_none_d11498e5e848a97f.manifest
File versionNot applicable
File size714
Date (UTC)15-Jan-2011
Time (UTC)15:19
PlatformNot applicable
File nameAmd64_4ed96fbafaaf0ae94bdf6cc43937a1bf_31bf3856ad364e35_6.1.7601.21642_none_5e85921e39f03f71.manifest
File versionNot applicable
File size714
Date (UTC)15-Jan-2011
Time (UTC)15:19
PlatformNot applicable
File nameAmd64_microsoft-windows-msmq-queuemanager-core_31bf3856ad364e35_6.1.7600.20881_none_dc327886926bdadc.manifest
File versionNot applicable
File size2,746
Date (UTC)15-Jan-2011
Time (UTC)07:02
PlatformNot applicable
File nameAmd64_microsoft-windows-msmq-queuemanager-core_31bf3856ad364e35_6.1.7601.21642_none_de4515868f70f05b.manifest
File versionNot applicable
File size2,746
Date (UTC)15-Jan-2011
Time (UTC)07:04
PlatformNot applicable
File nameUpdate.mum
File versionNot applicable
File size2,686
Date (UTC)15-Jan-2011
Time (UTC)15:19
PlatformNot applicable
Additional files for all supported IA-64-based versions of Windows Server 2008 R2
File nameIa64_0f4e74577e6a79bdcd4a7ff64f713e1e_31bf3856ad364e35_6.1.7600.20881_none_9ff2dc36853ae1f8.manifest
File versionNot applicable
File size712
Date (UTC)15-Jan-2011
Time (UTC)15:19
PlatformNot applicable
File nameIa64_bb905f436a3a6a9814eb4d70137b25e4_31bf3856ad364e35_6.1.7601.21642_none_bee45d02b9886bb9.manifest
File versionNot applicable
File size712
Date (UTC)15-Jan-2011
Time (UTC)15:19
PlatformNot applicable
File nameIa64_microsoft-windows-msmq-queuemanager-core_31bf3856ad364e35_6.1.7600.20881_none_801580f8da0c72a2.manifest
File versionNot applicable
File size2,744
Date (UTC)15-Jan-2011
Time (UTC)06:52
PlatformNot applicable
File nameIa64_microsoft-windows-msmq-queuemanager-core_31bf3856ad364e35_6.1.7601.21642_none_82281df8d7118821.manifest
File versionNot applicable
File size2,744
Date (UTC)15-Jan-2011
Time (UTC)07:00
PlatformNot applicable
File nameUpdate.mum
File versionNot applicable
File size1,937
Date (UTC)15-Jan-2011
Time (UTC)15:19
PlatformNot applicable