Symptoms

Consider the following scenario:

  • You install Internet Information Services (IIS) 7.5 on a computer that is running Windows 7 Service Pack 1 (SP1) or Windows Server 2008 R2 SP1. Or, you install IIS 8.0 on a computer that is running Windows 8, Windows Server 2012, Windows 8.1, or Windows Server 2012 R2.

  • The system sends a response that contains more than 2000 entity chunks.

  • When the system calls the SendResponse method to send the response, the initial I/O request is canceled. However, the request connection is still valid.

In this scenario, the IIS process crashes. Therefore, all the web applications that rely on IIS crash.

Cause

This issue is caused by an access violation. When the SendResponse method tries to resume the I/O request, the list of the chunks is repopulated. However, the chunks are freed.

Resolution

This hotfix is also available at Microsoft Update Catalog.

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=supportNote 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 8

  • Windows Server 2012

  • Windows 7 SP1

  • Windows Server 2008 R2 SP1

  • Windows 8.1

  • Windows Server 2012 R2

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:

976932Information 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.

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.

The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely important 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.

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.

For all supported x86-based versions of Windows 7

File name

File version

File size

Date

Time

Hwebcore.dll

7.5.7601.22443

12,800

06-Sep-2013

01:35

Iiscore.dll

7.5.7601.22443

200,192

06-Sep-2013

02:04

Iisstart.htm

Not applicable

689

10-Jun-2009

21:21

W3dt.dll

7.5.7601.22443

24,064

06-Sep-2013

01:36

Welcome.png

Not applicable

184,946

10-Jun-2009

21:21

For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

File version

File size

Date

Time

Hwebcore.dll

7.5.7601.22443

15,360

06-Sep-2013

02:25

Iiscore.dll

7.5.7601.22443

315,904

06-Sep-2013

02:26

Iisstart.htm

Not applicable

689

10-Jun-2009

20:38

W3dt.dll

7.5.7601.22443

32,256

06-Sep-2013

02:28

Welcome.png

Not applicable

184,946

10-Jun-2009

20:38

For all supported IA-64-based versions of Windows Server 2008 R2

File name

File version

File size

Date

Time

Hwebcore.dll

7.5.7601.22443

37,376

06-Sep-2013

01:33

Iiscore.dll

7.5.7601.22443

582,144

06-Sep-2013

01:33

Iisstart.htm

Not applicable

689

10-Jun-2009

20:42

W3dt.dll

7.5.7601.22443

52,736

06-Sep-2013

01:36

Welcome.png

Not applicable

184,946

10-Jun-2009

20:42

Windows 8 and Windows Server 2012 file information notesImportant Windows 8 hotfixes and Windows Server 2012 hotfixes are included in the same packages. However, only "Windows 8" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 8" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.

For all supported x86-based versions of Windows 8

File name

File version

File size

Date

Time

Hwebcore.dll

8.0.9200.20534

14,336

11-Oct-2012

05:11

Iiscore.dll

8.0.9200.20816

206,848

06-Sep-2013

04:22

W3dt.dll

8.0.9200.20534

25,600

11-Oct-2012

05:12

For all supported x64-based versions of Windows 8 and of Windows Server 2012

File name

File version

File size

Date

Time

Hwebcore.dll

8.0.9200.20534

16,896

11-Oct-2012

05:43

Iiscore.dll

8.0.9200.20816

318,976

06-Sep-2013

05:36

W3dt.dll

8.0.9200.20534

39,424

11-Oct-2012

05:44

Windows 8.1 and Windows Server 2012 R2 file information notesImportant Windows 8.1 hotfixes and Windows Server 2012 R2 hotfixes are included in the same packages. However, only "Windows 8.1" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 8.1" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.

For all supported x86-based versions of Windows 8.1

File name

File version

File size

Date

Time

Platform

Hwebcore.dll

8.5.9600.16384

15,872

22-Aug-2013

02:53

x86

Iiscore.dll

8.5.9600.16457

211,968

08-Nov-2013

04:25

x86

W3dt.dll

8.5.9600.16384

102,400

22-Aug-2013

02:52

x86

For all supported x64-based versions of Windows 8.1 and of Windows Server 2012 R2

File name

File version

File size

Date

Time

Platform

Hwebcore.dll

8.5.9600.16384

17,408

22-Aug-2013

10:02

x64

Iiscore.dll

8.5.9600.16457

307,712

08-Nov-2013

04:59

x64

W3dt.dll

8.5.9600.16384

107,520

22-Aug-2013

10:03

x64

Hwebcore.dll

8.5.9600.16384

15,872

22-Aug-2013

02:53

x86

Iiscore.dll

8.5.9600.16457

211,968

08-Nov-2013

04:25

x86

W3dt.dll

8.5.9600.16384

102,400

22-Aug-2013

02:52

x86


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:

824684Description of the standard terminology that is used to describe Microsoft software updates

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

Additional files for all supported x86-based versions of Windows 7

File name

File version

File size

Date

Time

X86_02ccf7fb741e3d429deb6b65ae1f87a2_31bf3856ad364e35_6.1.7601.22443_none_3ff9e5e1788e1d6a.manifest

Not applicable

705

06-Sep-2013

19:31

X86_microsoft-windows-iis-corewebengine_31bf3856ad364e35_6.1.7601.22443_none_d219843ba0bdcfc1.manifest

Not applicable

10,228

06-Sep-2013

02:32

Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

File version

File size

Date

Time

Amd64_645ead8318428c9f026db7f6642a093e_31bf3856ad364e35_6.1.7601.22443_none_10139d8f439db773.manifest

Not applicable

1,060

06-Sep-2013

19:31

Amd64_microsoft-windows-iis-corewebengine_31bf3856ad364e35_6.1.7601.22443_none_2e381fbf591b40f7.manifest

Not applicable

10,236

06-Sep-2013

02:54

Additional files for all supported IA-64-based versions of Windows Server 2008 R2

File name

File version

File size

Date

Time

Ia64_d997198a3187137a5cfa07006cfadc2f_31bf3856ad364e35_6.1.7601.22443_none_6222fe9908a1f5b1.manifest

Not applicable

1,058

06-Sep-2013

19:30

Ia64_microsoft-windows-iis-corewebengine_31bf3856ad364e35_6.1.7601.22443_none_d21b2831a0bbd8bd.manifest

Not applicable

10,232

06-Sep-2013

02:17

Additional file information for Windows 8 and Windows Server 2012

Additional files for all supported x86-based versions of Windows 8

File name

File version

File size

Date

Time

X86_fae5d8b4ee7839998d656a7f07bdefc6_31bf3856ad364e35_6.2.9200.20816_none_2af9bf6d4e9f3f93.manifest

Not applicable

713

06-Sep-2013

17:36

X86_microsoft-windows-i..rewebenginebinaries_31bf3856ad364e35_6.2.9200.20816_none_92868b8410373c90.manifest

Not applicable

7,012

06-Sep-2013

17:36

Additional files for all supported x64-based versions of Windows 8 and of Windows Server 2012

File name

File version

File size

Date

Time

Amd64_2dd6915a5bd31963c1dccdd44438a9fd_31bf3856ad364e35_6.2.9200.20816_none_8209bbe415fac37d.manifest

Not applicable

1,076

06-Sep-2013

17:39

Amd64_7d33b566a7cc297fc584e2f68a218b95_31bf3856ad364e35_6.2.9200.20816_none_7838447028e57cc2.manifest

Not applicable

717

06-Sep-2013

17:39

Amd64_9a5bc6686545156f403fbbe204e9362e_31bf3856ad364e35_6.2.9200.20816_none_36fd842f84aa998f.manifest

Not applicable

717

06-Sep-2013

17:39

Amd64_microsoft-windows-i..rewebenginebinaries_31bf3856ad364e35_6.2.9200.20816_none_eea52707c894adc6.manifest

Not applicable

7,018

06-Sep-2013

17:39

Additional file information for Windows 8.1 and Windows Server 2012 R2

Additional files for all supported x86-based versions of Windows 8.1

File name

File version

File size

Date

Time

Platform

X86_42db25741a1b5539d83ff081d799d32f_31bf3856ad364e35_6.3.9600.16457_none_c04a3c1eea3d8bbf.manifest

Not applicable

713

08-Nov-2013

20:15

Not applicable

X86_microsoft-windows-i..rewebenginebinaries_31bf3856ad364e35_6.3.9600.16457_none_29c76247416bfee9.manifest

Not applicable

7,012

08-Nov-2013

20:15

Not applicable

Additional files for all supported x64-based versions of Windows 8.1 and of Windows Server 2012 R2

File name

File version

File size

Date

Time

Platform

Amd64_70457ef70bd83e6b7b3b8ce8dc0baa15_31bf3856ad364e35_6.3.9600.16457_none_765981ff2ea7263c.manifest

Not applicable

717

08-Nov-2013

20:16

Not applicable

Amd64_a4e8a5ec7b29a120bef2b6cdb306b626_31bf3856ad364e35_6.3.9600.16457_none_3412bef07085718f.manifest

Not applicable

717

08-Nov-2013

20:16

Not applicable

Amd64_microsoft-windows-i..rewebenginebinaries_31bf3856ad364e35_6.3.9600.16457_none_85e5fdcaf9c9701f.manifest

Not applicable

7,018

08-Nov-2013

20:16

Not applicable

Wow64_microsoft-windows-i..rewebenginebinaries_31bf3856ad364e35_6.3.9600.16457_none_903aa81d2e2a321a.manifest

Not applicable

6,089

08-Nov-2013

20:16

Not applicable


Need more help?

Expand your skills
Explore Training
Get new features first
Join Microsoft Insiders

Was this information helpful?

What affected your experience?

Thank you for your feedback!

×