FIX: W3wp.exe process may crash intermittently when an application handles requests for extensionless URLs in IIS 7.0 or in IIS 7.5

Applies to: Windows Vista Service Pack 2Windows Server 2008 Service Pack 2Windows 7

Symptoms


Consider the following scenario:
  • You have a computer that is running Internet Information Services (IIS) 7.0 or IIS 7.5.
  • You apply hotfix 980368 or a later version of the hotfix that updates the Iiscore.dll file. The hotfix enables certain IIS 7.0 or IIS 7.5 handlers to handle requests of extensionless URLs.
  • You run an application that handles some requests for the extensionless URLs.

    For example, you run an application that handles some requests for one of the following URLs:
    • http://www.example.com/ExampleSite/ExampleFile
    • http://www.example.com/ExampleSite/ExampleFile.
In this scenario, the W3wp.exe process may crash intermittently. Additionally, you may receive the following error message:
Faulting application w3wp.exe, version 7.0.6002.18005, time stamp 0x49e023cf, faulting module iiscore.dll, version 7.0.6002.22388, time stamp 0x4bcf4110, exception code 0xc0000005, fault offset 0x000113dc, process id 0x18a4, application start time 0x01cbb6d588864020.

Resolution


Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that 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 IIS 7.0 or IIS 7.5 installed on a computer that is running one of the following operating systems:
  • Windows Vista Service Pack 2 (SP2)
  • Windows Server 2008 Service Pack 2 (SP2)
  • Windows 7
  • Windows 7 Service Pack 1 (SP1)
  • Windows Server 2008 R2
  • Windows Server 2008 R2 Service Pack 1 (SP1)

Restart requirement

You must restart the computer if IIS is running when you apply this update.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File Information

The global version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

For all supported x86-based versions of Windows Server 2008 and of Windows Vista
File nameFile versionFile sizeDateTimePlatform
Iiscore.dll7.0.6002.22615191,48817-Mar-201115:10x86
For all supported x64-based versions of Windows Server 2008 and of Windows Vista
File nameFile versionFile sizeDateTimePlatform
Iiscore.dll7.0.6002.22615296,44817-Mar-201115:16x64
For all supported IA-64-based versions Windows Server 2008
File nameFile versionFile sizeDateTimePlatform
Iiscore.dll7.0.6002.22615547,32817-Mar-201115:10IA-64
For all supported x86-based versions of Windows 7
File nameFile versionFile sizeDateTimePlatform
Iiscore.dll7.5.7600.20927198,14418-Mar-201106:07x86
Iiscore.dll7.5.7601.21686198,14418-Mar-201105:44x86
For all supported x64-based versions of Windows 7
File nameFile versionFile sizeDateTimePlatform
Iiscore.dll7.5.7600.20927314,36818-Mar-201106:36x64
Iiscore.dll7.5.7601.21686301,05618-Mar-201106:33x64
For all supported IA-64-based versions of Windows Server 2008 R2
File nameFile versionFile sizeDateTimePlatform
Iiscore.dll7.5.7600.20927575,48818-Mar-201105:31IA-64
Iiscore.dll7.5.7601.21686575,48818-Mar-201105:26IA-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, click the following article number to view the article in the Microsoft Knowledge Base:
980368 A update is available that enables certain IIS 7.0 or IIS 7.5 handlers to handle requests whose URLs do not end with a period

Additional file information

Additional file information for Windows Vista and for Windows Server 2008

Additional files for all supported x86-based versions of Windows Vista and of Windows Server 2008
File nameUpdate.mum
File versionNot Applicable
File size5,168
Date (UTC)18-Mar-2011
Time (UTC)19:11
PlatformNot Applicable
File nameX86_91b984434ed15667a08bddcf0e7275d8_31bf3856ad364e35_6.0.6002.22615_none_5f1d45ac2a543211.manifest
File versionNot Applicable
File size696
Date (UTC)18-Mar-2011
Time (UTC)19:11
PlatformNot Applicable
File nameX86_d4e3339bf959197df93dec94a94f7048_31bf3856ad364e35_6.0.6002.22615_none_10d94877385405ae.manifest
File versionNot Applicable
File size692
Date (UTC)18-Mar-2011
Time (UTC)19:11
PlatformNot Applicable
File nameX86_d5e4cfb23ff68bd7dcc880284647c41e_31bf3856ad364e35_6.0.6002.22615_none_83f7b8497606c19c.manifest
File versionNot Applicable
File size705
Date (UTC)18-Mar-2011
Time (UTC)19:11
PlatformNot Applicable
File nameX86_microsoft-windows-http-api_31bf3856ad364e35_6.0.6002.22615_none_f8168c68b393529d.manifest
File versionNot Applicable
File size4,708
Date (UTC)17-Mar-2011
Time (UTC)15:30
PlatformNot Applicable
File nameX86_microsoft-windows-http_31bf3856ad364e35_6.0.6002.22615_none_af2b4bb22f2265e2.manifest
File versionNot Applicable
File size144,703
Date (UTC)17-Mar-2011
Time (UTC)15:32
PlatformNot Applicable
File nameX86_microsoft-windows-iis-corewebengine_31bf3856ad364e35_6.0.6002.22615_none_d21457903f8c35e7.manifest
File versionNot Applicable
File size16,238
Date (UTC)17-Mar-2011
Time (UTC)15:28
PlatformNot Applicable
Additional files for all supported x64-based versions of Windows Vista and of Windows Server 2008
File nameIa64_16023fa54606e592f9482f628cdc0394_31bf3856ad364e35_6.0.6002.22615_none_4cd89fcec7ea5fff.manifest
File versionNot Applicable
File size694
Date (UTC)18-Mar-2011
Time (UTC)19:11
PlatformNot Applicable
File nameIa64_3e9378d1ecbff5cdc83daf2a238e4e23_31bf3856ad364e35_6.0.6002.22615_none_8a977fa7002fb593.manifest
File versionNot Applicable
File size1,058
Date (UTC)18-Mar-2011
Time (UTC)19:11
PlatformNot Applicable
File nameIa64_9bc002975474259b5a10fb1edd65f18a_31bf3856ad364e35_6.0.6002.22615_none_ccd61878a6e1dd2d.manifest
File versionNot Applicable
File size1,038
Date (UTC)18-Mar-2011
Time (UTC)19:11
PlatformNot Applicable
File nameIa64_microsoft-windows-http-api_31bf3856ad364e35_6.0.6002.22615_none_f818305eb3915b99.manifest
File versionNot Applicable
File size4,715
Date (UTC)17-Mar-2011
Time (UTC)15:23
PlatformNot Applicable
File nameIa64_microsoft-windows-http_31bf3856ad364e35_6.0.6002.22615_none_af2cefa82f206ede.manifest
File versionNot Applicable
File size144,957
Date (UTC)17-Mar-2011
Time (UTC)15:25
PlatformNot Applicable
File nameIa64_microsoft-windows-iis-corewebengine_31bf3856ad364e35_6.0.6002.22615_none_d215fb863f8a3ee3.manifest
File versionNot Applicable
File size16,254
Date (UTC)17-Mar-2011
Time (UTC)15:22
PlatformNot Applicable
File nameUpdate.mum
File versionNot Applicable
File size3,040
Date (UTC)18-Mar-2011
Time (UTC)19:11
PlatformNot Applicable
File nameWow64_microsoft-windows-iis-corewebengine_31bf3856ad364e35_6.0.6002.22615_none_38879d662c4a6918.manifest
File versionNot Applicable
File size9,710
Date (UTC)17-Mar-2011
Time (UTC)15:17
PlatformNot Applicable
File nameX86_microsoft-windows-http-api_31bf3856ad364e35_6.0.6002.22615_none_f8168c68b393529d.manifest
File versionNot Applicable
File size4,708
Date (UTC)17-Mar-2011
Time (UTC)15:30
PlatformNot Applicable
Additional files for all supported IA-64-based versions of Windows Vista and of Windows Server 2008
File nameIa64_16023fa54606e592f9482f628cdc0394_31bf3856ad364e35_6.0.6002.22615_none_4cd89fcec7ea5fff.manifest
File versionNot Applicable
File size694
Date (UTC)18-Mar-2011
Time (UTC)19:11
PlatformNot Applicable
File nameIa64_3e9378d1ecbff5cdc83daf2a238e4e23_31bf3856ad364e35_6.0.6002.22615_none_8a977fa7002fb593.manifest
File versionNot Applicable
File size1,058
Date (UTC)18-Mar-2011
Time (UTC)19:11
PlatformNot Applicable
File nameIa64_9bc002975474259b5a10fb1edd65f18a_31bf3856ad364e35_6.0.6002.22615_none_ccd61878a6e1dd2d.manifest
File versionNot Applicable
File size1,038
Date (UTC)18-Mar-2011
Time (UTC)19:11
PlatformNot Applicable
File nameIa64_microsoft-windows-http-api_31bf3856ad364e35_6.0.6002.22615_none_f818305eb3915b99.manifest
File versionNot Applicable
File size4,715
Date (UTC)17-Mar-2011
Time (UTC)15:23
PlatformNot Applicable
File nameIa64_microsoft-windows-http_31bf3856ad364e35_6.0.6002.22615_none_af2cefa82f206ede.manifest
File versionNot Applicable
File size144,957
Date (UTC)17-Mar-2011
Time (UTC)15:25
PlatformNot Applicable
File nameIa64_microsoft-windows-iis-corewebengine_31bf3856ad364e35_6.0.6002.22615_none_d215fb863f8a3ee3.manifest
File versionNot Applicable
File size16,254
Date (UTC)17-Mar-2011
Time (UTC)15:22
PlatformNot Applicable
File nameUpdate.mum
File versionNot Applicable
File size3,040
Date (UTC)18-Mar-2011
Time (UTC)19:11
PlatformNot Applicable
File nameWow64_microsoft-windows-iis-corewebengine_31bf3856ad364e35_6.0.6002.22615_none_38879d662c4a6918.manifest
File versionNot Applicable
File size9,710
Date (UTC)17-Mar-2011
Time (UTC)15:17
PlatformNot Applicable
File nameX86_microsoft-windows-http-api_31bf3856ad364e35_6.0.6002.22615_none_f8168c68b393529d.manifest
File versionNot Applicable
File size4,708
Date (UTC)17-Mar-2011
Time (UTC)15:30
PlatformNot Applicable

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 size3,102
Date (UTC)18-Mar-2011
Time (UTC)17:41
PlatformNot Applicable
File nameX86_1674b4d7760a5b9d440795259e479822_31bf3856ad364e35_6.1.7601.21686_none_d1d562f8fe05c118.manifest
File versionNot Applicable
File size705
Date (UTC)18-Mar-2011
Time (UTC)17:41
PlatformNot Applicable
File nameX86_bbcc3fbb470af7801c48b45543925a6b_31bf3856ad364e35_6.1.7600.20927_none_4ee3f4391ec27195.manifest
File versionNot Applicable
File size705
Date (UTC)18-Mar-2011
Time (UTC)17:41
PlatformNot Applicable
File nameX86_microsoft-windows-iis-corewebengine_31bf3856ad364e35_6.1.7600.20927_none_d04ce4afa3836f23.manifest
File versionNot Applicable
File size10,228
Date (UTC)18-Mar-2011
Time (UTC)06:33
PlatformNot Applicable
File nameX86_microsoft-windows-iis-corewebengine_31bf3856ad364e35_6.1.7601.21686_none_d1f15ffda0db6c37.manifest
File versionNot Applicable
File size10,228
Date (UTC)18-Mar-2011
Time (UTC)06:13
PlatformNot Applicable
Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2





File nameAmd64_1bdf680c76ce4866e3b309c20259ae77_31bf3856ad364e35_6.1.7601.21686_none_6c74a911a2e5f1f7.manifest
File versionNot Applicable
File size1,060
Date (UTC)18-Mar-2011
Time (UTC)17:42
PlatformNot Applicable
File nameAmd64_aa0e4a51faff9bc4a7e984d071846be9_31bf3856ad364e35_6.1.7600.20927_none_21d4aa12bbb0da12.manifest
File versionNot Applicable
File size1,060
Date (UTC)18-Mar-2011
Time (UTC)17:42
PlatformNot Applicable
File nameAmd64_microsoft-windows-iis-corewebengine_31bf3856ad364e35_6.1.7600.20927_none_2c6b80335be0e059.manifest
File versionNot Applicable
File size10,236
Date (UTC)18-Mar-2011
Time (UTC)07:38
PlatformNot Applicable
File nameAmd64_microsoft-windows-iis-corewebengine_31bf3856ad364e35_6.1.7601.21686_none_2e0ffb815938dd6d.manifest
File versionNot Applicable
File size10,236
Date (UTC)18-Mar-2011
Time (UTC)07:04
PlatformNot Applicable
File nameUpdate.mum
File versionNot Applicable
File size3,542
Date (UTC)18-Mar-2011
Time (UTC)17:42
PlatformNot Applicable
File nameWow64_microsoft-windows-iis-corewebengine_31bf3856ad364e35_6.1.7600.20927_none_36c02a859041a254.manifest
File versionNot Applicable
File size7,906
Date (UTC)18-Mar-2011
Time (UTC)06:27
PlatformNot Applicable
File nameWow64_microsoft-windows-iis-corewebengine_31bf3856ad364e35_6.1.7601.21686_none_3864a5d38d999f68.manifest
File versionNot Applicable
File size7,906
Date (UTC)18-Mar-2011
Time (UTC)06:06
PlatformNot Applicable
Additional files for all supported IA-64-based versions of Windows Server 2008 R2
File nameIa64_63553d2cf01ddd175a9f4f54c4ce46e0_31bf3856ad364e35_6.1.7600.20927_none_a3a0edb4525acf1d.manifest
File versionNot Applicable
File size1,058
Date (UTC)18-Mar-2011
Time (UTC)17:41
PlatformNot Applicable
File nameIa64_873323d24d4d50163063165627e0a3ea_31bf3856ad364e35_6.1.7601.21686_none_3efd1270a3a94143.manifest
File versionNot Applicable
File size1,058
Date (UTC)18-Mar-2011
Time (UTC)17:41
PlatformNot Applicable
File nameIa64_microsoft-windows-iis-corewebengine_31bf3856ad364e35_6.1.7600.20927_none_d04e88a5a381781f.manifest
File versionNot Applicable
File size10,232
Date (UTC)18-Mar-2011
Time (UTC)07:35
PlatformNot Applicable
File nameIa64_microsoft-windows-iis-corewebengine_31bf3856ad364e35_6.1.7601.21686_none_d1f303f3a0d97533.manifest
File versionNot Applicable
File size10,232
Date (UTC)18-Mar-2011
Time (UTC)07:04
PlatformNot Applicable
File nameUpdate.mum
File versionNot Applicable
File size2,767
Date (UTC)18-Mar-2011
Time (UTC)17:41
PlatformNot Applicable
File nameWow64_microsoft-windows-iis-corewebengine_31bf3856ad364e35_6.1.7600.20927_none_36c02a859041a254.manifest
File versionNot Applicable
File size7,906
Date (UTC)18-Mar-2011
Time (UTC)06:27
PlatformNot Applicable
File nameWow64_microsoft-windows-iis-corewebengine_31bf3856ad364e35_6.1.7601.21686_none_3864a5d38d999f68.manifest
File versionNot Applicable
File size7,906
Date (UTC)18-Mar-2011
Time (UTC)06:06
PlatformNot Applicable

Call stack information

0:014> kv
ChildEBP RetAddr Args to Child
01e0f994 73e36e55 00be5968 00beb198 00000004 iiscore!W3_URL_INFO::ProcessUrl+0xd7 (FPO: [Non-Fpo]) (CONV: thiscall)
01e0f9d4 73e36257 01e0f9f4 017fc6e4 017fc6e0 iiscore!W3_CONTEXT::CalculateScriptMap+0x136 (FPO: [Non-Fpo]) (CONV: thiscall)
01e0fa04 73e368cb 017fc6e0 017fc6e4 00000000 iiscore!W3_CONTEXT::SetupStateMachinePhase2+0x109 (FPO: [Non-Fpo]) (CONV: thiscall)
01e0fa6c 73e34f45 017fc6e4 017fc6e0 75d00df0 iiscore!W3_CONTEXT::SetupStateMachine+0x1c6 (FPO: [Non-Fpo]) (CONV: thiscall)
01e0fa80 73e3c880 017fc6e4 00000000 00baf0b0 iiscore!W3_MAIN_CONTEXT::StartNotificationLoop+0x3f (FPO: [Non-Fpo]) (CONV: thiscall)
01e0fa98 745513b3 017fbc88 017fbc88 74551330 iiscore!W3_MAIN_CONTEXT::OnNewRequest+0x4c (FPO: [Non-Fpo]) (CONV: stdcall)
01e0faa4 74551330 75d00e04 01e0fac4 745511da w3dt!UL_NATIVE_REQUEST::DoStateProcess+0x26 (FPO: [0,0,4]) (CONV: thiscall)
01e0fab0 745511da 0000036d 00000000 017fbc8c w3dt!UL_NATIVE_REQUEST::DoWork+0x60 (FPO: [Non-Fpo]) (CONV: thiscall)
01e0fac4 75a72644 00000000 0000036d 017fbc8c w3dt!OverlappedCompletionRoutine+0x1a (FPO: [Non-Fpo]) (CONV: stdcall)
01e0fafc 75a72845 00000000 00bb1b50 75a70000 w3tp!THREAD_POOL_DATA::ThreadPoolThread+0x89 (FPO: [Non-Fpo]) (CONV: thiscall)
01e0fb10 75a71eb5 00000102 00000000 00000000 w3tp!THREAD_POOL_DATA::ThreadPoolThread+0x24 (FPO: [Non-Fpo]) (CONV: stdcall)
01e0fb28 75d7eccb 00bb1b50 01e0fb74 77c6d24d w3tp!THREAD_MANAGER::ThreadManagerThread+0x39 (FPO: [Non-Fpo]) (CONV: stdcall)
01e0fb34 77c6d24d 00bb1b50 4a6594db 00000000 kernel32!BaseThreadInitThunk+0xe (FPO: [Non-Fpo]) (CONV: fastcall)
01e0fb74 77c6d45f 75a71e7c 00bb1b50 ffffffff ntdll!__RtlUserThreadStart+0x23 (FPO: [Non-Fpo]) (CONV: stdcall)
01e0fb8c 00000000 75a71e7c 00bb1b50 00000000 ntdll!_RtlUserThreadStart+0x1b (FPO: [Non-Fpo]) (CONV: stdcall)