An instance of the JScript scripting engine leaks memory when Internet Explorer 8 or Internet Explorer 9 is installed on a computer that is running Windows 7 or Windows Server 2008 R2

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Article ID: 2707082

Applies to

This article applies to the following:
  • Windows Internet Explorer 9 when used with:
    • Windows 7
    • Windows 7 Service Pack 1
    • Windows Server 2008 R2
    • Windows Server 2008 R2 Service Pack 1
  • Windows Internet Explorer 8 when used with:
    • Windows 7
    • Windows 7 Service Pack 1
    • Windows Server 2008 R2
    • Windows Server 2008 R2 Service Pack 1
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On This Page

Symptoms

Consider the following scenario:
  • You have Windows Internet Explorer 8 or Internet Explorer 9 installed on a computer that is running Windows 7 or Windows Server 2008 R2.
  • You create an instance of the JScript scripting engine by using the IActiveScriptSite interface and the IActiveScript interface.
  • You execute a script in the new instance of the JScript scripting engine.
  • You release the instance of the JScript scripting engine. However, you do not close the instance.
  • You call and then release the script objects

In this scenario, you may notice that the instance of the JScript scripting engine leaks memory.

Resolution

To resolve this problem, install the update that is described this this section. After you install this update, set the SCRIPTPROP_HOSTKEEPALIVE property to True. For more information about this property, go to the following Microsoft Developer Network (MSDN) website:
SCRIPTPROP_HOSTKEEPALIVE Property

Note If you have security update 2706045 installed, you do not have to install this update. For more information about security update 2706045, click the following article number to view the article in the Microsoft Knowledge Base:
2706045 MS12-056: Vulnerability in JScript could allow remote code execution: August 14, 2012

Update information

Windows 7 or Windows Server 2008 R2 together with Internet Explorer 9

To resolve this problem for Windows 7 or Windows Server 2008 R2 on a system that has Internet Explorer 9 installed, install the most recent cumulative security update for Internet Explorer. To do this, go to the following Microsoft website:
http://update.microsoft.com
For technical information about the most recent cumulative security update for Internet Explorer, go to the following Microsoft website:
http://www.microsoft.com/technet/security/current.aspx
Note This update was first included in security update 2722913.

For more information about the security update, click the following article number to view the article in the Microsoft Knowledge Base:
2722913 MS12-052: Cumulative Security Update for Internet Explorer: August 14, 2012

Windows 7 or Windows Server 2008 R2 together with Internet Explorer 8

To resolve this problem for Windows 7 or Windows Server 2008 R2 on a system that has Internet Explorer 8 installed, apply this hotfix. This problem is also resolved by the JScript.dll file that is installed by security update 2706045.

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, go to 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.

Additionally, you can install this update from the Microsoft Download Center. The following updates are available for download from the Microsoft Download Center:

Update for Windows 7 (KB2707082)
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Download
Download the Windows 7 update package now.
Update for Windows 7 for x64-based systems (KB2707082)
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Download
Download the Windows 7 for x64-based systems update package now.
Update for Windows Server 2008 R2 x64-based systems (KB2707082)
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Download
Download the Windows Server 2008 R2 x64-based systems update package now.
Update for Windows Server 2008 R2 for Itanium-based systems (KB2707082)
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Download
Download the Windows Server 2008 R2 for Itanium-based systems update package now.

File information

The English (United States) 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
  • The MANIFEST files (.manifest) that are installed for each environment are listed separately in the "Additional file information for Windows 7 and for Windows Server 2008 R2" section. MANIFEST files, and the associated security catalog (.cat) files, are very important for maintaining the state of the updated components. 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
Jscript.dll5.8.7600.17045717,82416-Jun-201204:36
Jscript.dll5.8.7600.21238717,82416-Jun-201204:29
Jscript.dll5.8.7601.17866717,82416-Jun-201204:26
Jscript.dll5.8.7601.22024717,82416-Jun-201204:13
For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Jscript.dll5.8.7600.17045850,94416-Jun-201205:25x64
Jscript.dll5.8.7600.21238850,94416-Jun-201205:29x64
Jscript.dll5.8.7601.17866911,36016-Jun-201205:15x64
Jscript.dll5.8.7601.22024911,36016-Jun-201205:29x64
Jscript.dll5.8.7600.17045717,82416-Jun-201204:36x86
Jscript.dll5.8.7600.21238717,82416-Jun-201204:29x86
Jscript.dll5.8.7601.17866717,82416-Jun-201204:26x86
Jscript.dll5.8.7601.22024717,82416-Jun-201204:13x86
For all supported IA-64-based versions of Windows Server 2008 R2
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Jscript.dll5.8.7600.170451,772,54416-Jun-201204:18IA-64
Jscript.dll5.8.7600.212381,772,54416-Jun-201204:30IA-64
Jscript.dll5.8.7601.178661,772,54416-Jun-201204:17IA-64
Jscript.dll5.8.7601.220241,772,54416-Jun-201204:22IA-64
Jscript.dll5.8.7600.17045717,82416-Jun-201204:36x86
Jscript.dll5.8.7600.21238717,82416-Jun-201204:29x86
Jscript.dll5.8.7601.17866717,82416-Jun-201204:26x86
Jscript.dll5.8.7601.22024717,82416-Jun-201204:13x86

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 the IActiveScriptSite interface and the IActiveScript interface, go to the following Microsoft Developer Network (MSDN) websites:
IActiveScript

IActiveScriptSite

For more information about how to set the SCRIPTPROP_HOSTKEEPALIVE property, go to the following MSDN website:
SCRIPTPROP_HOSTKEEPALIVE Property
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_3614180a5a54fe932471085976656cae_31bf3856ad364e35_8.0.7600.21238_none_7d0fbef6f280db29.manifest
File versionNot applicable
File size705
Date (UTC)18-Jun-2012
Time (UTC)17:35
File nameX86_433559693f44247906a8d8e2211aa002_31bf3856ad364e35_8.0.7601.17866_none_70fbfb8cd49a30b8.manifest
File versionNot applicable
File size705
Date (UTC)18-Jun-2012
Time (UTC)17:35
File nameX86_a945bc5d5ec4bab3270cc38ee460ef7e_31bf3856ad364e35_8.0.7600.17045_none_7832c1a6df55e712.manifest
File versionNot applicable
File size705
Date (UTC)18-Jun-2012
Time (UTC)17:35
File nameX86_fc6352c5acc7b4bc7bc65696debd2416_31bf3856ad364e35_8.0.7601.22024_none_1148ba47cbdb9153.manifest
File versionNot applicable
File size705
Date (UTC)18-Jun-2012
Time (UTC)17:35
File nameX86_microsoft-windows-scripting-jscript_31bf3856ad364e35_8.0.7600.17045_none_9d9ba927cf599763.manifest
File versionNot applicable
File size22,972
Date (UTC)16-Jun-2012
Time (UTC)05:01
File nameX86_microsoft-windows-scripting-jscript_31bf3856ad364e35_8.0.7600.21238_none_9e3318a2e86c6468.manifest
File versionNot applicable
File size22,972
Date (UTC)16-Jun-2012
Time (UTC)05:04
File nameX86_microsoft-windows-scripting-jscript_31bf3856ad364e35_8.0.7601.17866_none_9f6d9063cc8f1e6d.manifest
File versionNot applicable
File size22,972
Date (UTC)16-Jun-2012
Time (UTC)04:57
File nameX86_microsoft-windows-scripting-jscript_31bf3856ad364e35_8.0.7601.22024_none_a020446ce58e4f07.manifest
File versionNot applicable
File size22,972
Date (UTC)16-Jun-2012
Time (UTC)04:42
Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
Collapse this tableExpand this table
File nameAmd64_0d56aecf11032c2e2424fb4713435aa8_31bf3856ad364e35_8.0.7601.17866_none_9fabe441f277d609.manifest
File versionNot applicable
File size1,058
Date (UTC)18-Jun-2012
Time (UTC)17:35
File nameAmd64_1ae8d4966e29e76c332704e5fd2a164b_31bf3856ad364e35_8.0.7601.22024_none_b98b68b0925b57bb.manifest
File versionNot applicable
File size1,060
Date (UTC)18-Jun-2012
Time (UTC)17:35
File nameAmd64_1c8e9cfde3da5e553f003429b8649b7f_31bf3856ad364e35_8.0.7600.17045_none_5c2d45c07142a556.manifest
File versionNot applicable
File size1,060
Date (UTC)18-Jun-2012
Time (UTC)17:35
File nameAmd64_21165e3742d595d39bcb42abba9b905a_31bf3856ad364e35_8.0.7601.22024_none_6ddcfdbdd9e46279.manifest
File versionNot applicable
File size709
Date (UTC)18-Jun-2012
Time (UTC)17:35
File nameAmd64_2b020a33659f0a966be262ed7a3db891_31bf3856ad364e35_8.0.7600.21238_none_16fd35952f9bded2.manifest
File versionNot applicable
File size709
Date (UTC)18-Jun-2012
Time (UTC)17:35
File nameAmd64_3cce43fe97aed83e0b40a524d7a4f37f_31bf3856ad364e35_8.0.7601.22024_none_a95182137e260089.manifest
File versionNot applicable
File size1,058
Date (UTC)18-Jun-2012
Time (UTC)17:35
File nameAmd64_4ba84268000fac48642fb225c7e5728c_31bf3856ad364e35_8.0.7600.21238_none_5cf53747af579bc2.manifest
File versionNot applicable
File size1,058
Date (UTC)18-Jun-2012
Time (UTC)17:35
File nameAmd64_56c3d54deab5d2ec3632026d89c10cf3_31bf3856ad364e35_8.0.7600.17045_none_b02a8db106a27b9b.manifest
File versionNot applicable
File size1,058
Date (UTC)18-Jun-2012
Time (UTC)17:35
File nameAmd64_693e4ec8ca147ae8a30b2d4c3e245d54_31bf3856ad364e35_8.0.7600.21238_none_d21b0e22c4940f20.manifest
File versionNot applicable
File size709
Date (UTC)18-Jun-2012
Time (UTC)17:35
File nameAmd64_695c405833e475d1d5937b41a3983d92_31bf3856ad364e35_8.0.7601.17866_none_f28003cc92801a49.manifest
File versionNot applicable
File size1,060
Date (UTC)18-Jun-2012
Time (UTC)17:35
File nameAmd64_6e4b121927b32ad56c52c256a79d41a2_31bf3856ad364e35_8.0.7601.17866_none_c993476ffbe48c3a.manifest
File versionNot applicable
File size709
Date (UTC)18-Jun-2012
Time (UTC)17:35
File nameAmd64_8b3e590114c9ee6bca6d8b2808a912d1_31bf3856ad364e35_8.0.7600.17045_none_f9b985fe234cdac5.manifest
File versionNot applicable
File size709
Date (UTC)18-Jun-2012
Time (UTC)17:35
File nameAmd64_a3dbdfede2ece25be3cb636b7d7e20de_31bf3856ad364e35_8.0.7601.22024_none_3a0575f279a5e48b.manifest
File versionNot applicable
File size709
Date (UTC)18-Jun-2012
Time (UTC)17:35
File nameAmd64_c9c3b15438ec28e186938ebdb1c2ad93_31bf3856ad364e35_8.0.7600.21238_none_4e27a6d3161bf1d9.manifest
File versionNot applicable
File size1,060
Date (UTC)18-Jun-2012
Time (UTC)17:35
File nameAmd64_e2fde8b35a88bd09cbb35da59c571072_31bf3856ad364e35_8.0.7601.17866_none_0e48ce986e106f5a.manifest
File versionNot applicable
File size709
Date (UTC)18-Jun-2012
Time (UTC)17:35
File nameAmd64_ebfce74f90f56d3dd93969f0feac3873_31bf3856ad364e35_8.0.7600.17045_none_ecbd611fb3a0947c.manifest
File versionNot applicable
File size709
Date (UTC)18-Jun-2012
Time (UTC)17:35
File nameAmd64_microsoft-windows-scripting-jscript_31bf3856ad364e35_8.0.7600.17045_none_f9ba44ab87b70899.manifest
File versionNot applicable
File size22,976
Date (UTC)16-Jun-2012
Time (UTC)06:03
File nameAmd64_microsoft-windows-scripting-jscript_31bf3856ad364e35_8.0.7600.21238_none_fa51b426a0c9d59e.manifest
File versionNot applicable
File size22,976
Date (UTC)16-Jun-2012
Time (UTC)05:57
File nameAmd64_microsoft-windows-scripting-jscript_31bf3856ad364e35_8.0.7601.17866_none_fb8c2be784ec8fa3.manifest
File versionNot applicable
File size22,976
Date (UTC)16-Jun-2012
Time (UTC)05:47
File nameAmd64_microsoft-windows-scripting-jscript_31bf3856ad364e35_8.0.7601.22024_none_fc3edff09debc03d.manifest
File versionNot applicable
File size22,976
Date (UTC)16-Jun-2012
Time (UTC)06:08
File nameWow64_microsoft-windows-scripting-jscript_31bf3856ad364e35_8.0.7600.17045_none_040eeefdbc17ca94.manifest
File versionNot applicable
File size21,126
Date (UTC)16-Jun-2012
Time (UTC)04:54
File nameWow64_microsoft-windows-scripting-jscript_31bf3856ad364e35_8.0.7600.21238_none_04a65e78d52a9799.manifest
File versionNot applicable
File size21,126
Date (UTC)16-Jun-2012
Time (UTC)04:47
File nameWow64_microsoft-windows-scripting-jscript_31bf3856ad364e35_8.0.7601.17866_none_05e0d639b94d519e.manifest
File versionNot applicable
File size21,126
Date (UTC)16-Jun-2012
Time (UTC)04:44
File nameWow64_microsoft-windows-scripting-jscript_31bf3856ad364e35_8.0.7601.22024_none_06938a42d24c8238.manifest
File versionNot applicable
File size21,126
Date (UTC)16-Jun-2012
Time (UTC)04:28
Additional files for all supported IA-64-based versions of Windows Server 2008 R2
Collapse this tableExpand this table
File nameIa64_048155853ddbd5234d3b87d347edc78c_31bf3856ad364e35_8.0.7600.21238_none_162cfedd5cf47629.manifest
File versionNot applicable
File size1,058
Date (UTC)18-Jun-2012
Time (UTC)17:35
File nameIa64_1c2617c433f2ab6800fd78c1348f618f_31bf3856ad364e35_8.0.7600.17045_none_ead7bcad621a2220.manifest
File versionNot applicable
File size1,058
Date (UTC)18-Jun-2012
Time (UTC)17:35
File nameIa64_a8acc4fe32c7505bcf29dc45b5479798_31bf3856ad364e35_8.0.7601.22024_none_3c8fdbdc345c05fa.manifest
File versionNot applicable
File size1,058
Date (UTC)18-Jun-2012
Time (UTC)17:35
File nameIa64_e3187312863e619f04e61e08d40d9bd7_31bf3856ad364e35_8.0.7601.17866_none_0d6738595cd5ca5e.manifest
File versionNot applicable
File size1,058
Date (UTC)18-Jun-2012
Time (UTC)17:35
File nameIa64_microsoft-windows-scripting-jscript_31bf3856ad364e35_8.0.7600.17045_none_9d9d4d1dcf57a05f.manifest
File versionNot applicable
File size22,974
Date (UTC)16-Jun-2012
Time (UTC)05:58
File nameIa64_microsoft-windows-scripting-jscript_31bf3856ad364e35_8.0.7600.21238_none_9e34bc98e86a6d64.manifest
File versionNot applicable
File size22,974
Date (UTC)16-Jun-2012
Time (UTC)05:48
File nameIa64_microsoft-windows-scripting-jscript_31bf3856ad364e35_8.0.7601.17866_none_9f6f3459cc8d2769.manifest
File versionNot applicable
File size22,974
Date (UTC)16-Jun-2012
Time (UTC)05:45
File nameIa64_microsoft-windows-scripting-jscript_31bf3856ad364e35_8.0.7601.22024_none_a021e862e58c5803.manifest
File versionNot applicable
File size22,974
Date (UTC)16-Jun-2012
Time (UTC)05:33
File nameWow64_microsoft-windows-scripting-jscript_31bf3856ad364e35_8.0.7600.17045_none_040eeefdbc17ca94.manifest
File versionNot applicable
File size21,126
Date (UTC)16-Jun-2012
Time (UTC)04:54
File nameWow64_microsoft-windows-scripting-jscript_31bf3856ad364e35_8.0.7600.21238_none_04a65e78d52a9799.manifest
File versionNot applicable
File size21,126
Date (UTC)16-Jun-2012
Time (UTC)04:47
File nameWow64_microsoft-windows-scripting-jscript_31bf3856ad364e35_8.0.7601.17866_none_05e0d639b94d519e.manifest
File versionNot applicable
File size21,126
Date (UTC)16-Jun-2012
Time (UTC)04:44
File nameWow64_microsoft-windows-scripting-jscript_31bf3856ad364e35_8.0.7601.22024_none_06938a42d24c8238.manifest
File versionNot applicable
File size21,126
Date (UTC)16-Jun-2012
Time (UTC)04:28

Properties

Article ID: 2707082 - Last Review: August 30, 2012 - Revision: 2.0
Keywords: 
kbautohotfix kbqfe kbhotfixserver kbfix kbmbsjscript kbexpertiseinter kbsurveynew KB2707082

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