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Microsoft Security Bulletin MS11-027 - Critical

Cumulative Security Update of ActiveX Kill Bits (2508272)

Published: April 12, 2011 | Updated: July 27, 2011

Version: 1.1

General Information

Executive Summary

This security update resolves two privately reported vulnerabilities and one publicly disclosed vulnerability in Microsoft software. The vulnerabilities could allow remote code execution if a user views a specially crafted Web page that instantiates a specific ActiveX control with Internet Explorer. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. This update also includes kill bits for three third-party ActiveX controls.

This security update is rated Critical for all supported editions of Windows XP, Windows Vista, and Windows 7, and Moderate for all supported editions of Windows Server 2003 (except Itanium-based editions), Windows Server2008 (except Itanium-based editions), and Windows Server 2008 R2. For Itanium-based editions of Windows Server 2003 and Windows Server 2008, this security update has no severity rating. For more information, see the subsection, Affected and Non-Affected Software, in this section.

The security update addresses the vulnerabilities by setting kill bits so that the vulnerable controls do not run in Internet Explorer. For more information about the vulnerabilities, see the Frequently Asked Questions (FAQ) subsections under the next section, Vulnerability Information.

Recommendation. The majority of customers have automatic updating enabled and will not need to take any action because this security update will be downloaded and installed automatically. Customers who have not enabled automatic updating need to check for updates and install this update manually. For information about specific configuration options in automatic updating, see Microsoft Knowledge Base Article 294871.

For administrators and enterprise installations, or end users who want to install this security update manually, Microsoft recommends that customers apply the update immediately using update management software, or by checking for updates using the Microsoft Update service.

See also the section, Detection and Deployment Tools and Guidance, later in this bulletin.

Known Issues. None

Affected and Non-Affected Software

The following software have been tested to determine which versions or editions are affected. Other versions or editions are either past their support life cycle or are not affected. To determine the support life cycle for your software version or edition, visit Microsoft Support Lifecycle.

Affected Software

Operating SystemMaximum Security ImpactAggregate Severity RatingBulletins Replaced by this Update
Windows XP Service Pack 3 Remote Code ExecutionCritical MS10-034
Windows XP Professional x64 Edition Service Pack 2 Remote Code ExecutionCritical MS10-034
Windows Server 2003 Service Pack 2 Remote Code ExecutionModerate MS10-034
Windows Server 2003 x64 Edition Service Pack 2 Remote Code ExecutionModerate MS10-034
Windows Server 2003 with SP2 for Itanium-based Systems NoneNo severity rating[1] MS10-034
Windows Vista Service Pack 1 and Windows Vista Service Pack 2 Remote Code ExecutionCritical MS10-034
Windows Vista x64 Edition Service Pack 1 and Windows Vista x64 Edition Service Pack 2 Remote Code ExecutionCritical MS10-034
Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit Systems Service Pack 2**Remote Code ExecutionModerate MS10-034
Windows Server 2008 for x64-based Systems and Windows Server 2008 for x64-based Systems Service Pack 2**Remote Code ExecutionModerate MS10-034
Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for Itanium-based Systems Service Pack 2 NoneNo severity rating[1] MS10-034
Windows 7 for 32-bit Systems Remote Code ExecutionCritical MS10-034
Windows 7 for 32-bit Systems Service Pack 1 Remote Code ExecutionCriticalNone
Windows 7 for x64-based Systems Remote Code ExecutionCritical MS10-034
Windows 7 for x64-based Systems Service Pack 1 Remote Code ExecutionCriticalNone
Windows Server 2008 R2 for x64-based Systems**Remote Code ExecutionModerate MS10-034
Windows Server 2008 R2 for x64-based Systems Service Pack 1**Remote Code ExecutionModerateNone
Windows Server 2008 R2 for Itanium-based Systems Remote Code ExecutionModerate MS10-034
Windows Server 2008 R2 for Itanium-based Systems Service Pack 1 Remote Code ExecutionModerateNone

[1]The vulnerabilities do not affect this specific operating system. However, the available updates that set kill bits for third-party controls apply to several operating systems, including this one. For more information, see the subsection, "Third-Party Kill Bits," in the Vulnerability Information section.

**Server Core installation not affected. The vulnerabilities addressed by this update do not affect supported editions of Windows Server 2008 or Windows Server 2008 R2 as indicated, when installed using the Server Core installation option. For more information on this installation option, see the TechNet articles, Managing a Server Core Installation and Servicing a Server Core Installation. Note that the Server Core installation option does not apply to certain editions of Windows Server 2008 and Windows Server 2008 R2; see Compare Server Core Installation Options.

What kill bits does this Cumulative Security Update of ActiveX Kill Bits contain? 
This Cumulative Security Update of ActiveX Kill Bits contains new kill bits and all kill bits previously released in MS08-023, Security Update of ActiveX Kill Bits; MS08-032, Cumulative Security Update of ActiveX Kill Bits; MS09-032, Cumulative Security Update of ActiveX Kill Bits; MS09-055, Cumulative Security Update of ActiveX Kill Bits; MS10-008, Cumulative Security Update of ActiveX Kill Bits; MS10-034, Cumulative Security Update of ActiveX Kill Bits; and advisories entitled Update Rollup for ActiveX Kill Bits, Microsoft Security Advisory 953839, Microsoft Security Advisory 956391, Microsoft Security Advisory 960715, and Microsoft Security Advisory 969898.

What is a kill bit?
A security feature in Microsoft Internet Explorer makes it possible to prevent an ActiveX control from ever being loaded by the Internet Explorer HTML-rendering engine. This is done by making a registry setting and is referred to as setting the kill bit. After the kill bit is set, the control can never be loaded, even when it is fully installed. Setting the kill bit makes sure that even if a vulnerable component is introduced or is re-introduced to a system, it remains inert and harmless.

For more information on kill bits, see Microsoft Knowledge Base Article 240797: How to stop an ActiveX control from running in Internet Explorer.

What is a security update of ActiveX kill bits? 
A security update of ActiveX kill bits contains the class IDs (CLSID) of certain ActiveX controls that are the basis of the security update. This security bulletin lists these CLSIDs in the Vulnerability Information section.

Why does this update not contain any binary files? 
This update only makes changes to the registry to disable the controls from instantiating in Internet Explorer.

Should I install this update if I do not have the affected component installed or use the affected platform? 
Yes. Installing this update will block the vulnerable control from running in Internet Explorer.

Do I need to reapply this update if I install an ActiveX control discussed in this security update at a later date? 
No, reapplying this update is not required. The kill bit will block Internet Explorer from running the control even if the control is installed at a later date.

A kill bit for the Microsoft Internet Explorer 8 Developer Tools Vulnerability (CVE-2010-0811) was already set in MS10-034. Why is another kill bit being set by this update? 
Microsoft is adding an additional CLSID to the kill bit list for this ActiveX control.

Does this update contain any kill bits that are not Microsoft-specific? 
Yes. Microsoft has been requested by organizations to set the kill bit for controls that the organizations own and have found to be vulnerable. See the subsection, "Third-Party Kill Bits," in the Vulnerability Information section.

Does this update contain kill bits that were previously shipped in an Internet Explorer security update? 
No, this update does not include kill bits that were previously shipped in an Internet Explorer security update. We recommend that you install the latest Cumulative Security Update for Internet Explorer.

Why does this security update have different severity levels for different Windows operating systems? 
This update has different severity levels because different mitigations apply to the vulnerability depending on the operating system. One such mitigation is that Internet Explorer on Windows Server 2003 and Windows Server 2008 runs in a restricted mode known as Enhanced Security Configuration.

I am using an older release of the software discussed in this security bulletin. What should I do? 
The affected software listed in this bulletin have been tested to determine which releases are affected. Other releases are past their support life cycle. For more information about the product lifecycle, visit the Microsoft Support Lifecycle Web site.

It should be a priority for customers who have older releases of the software to migrate to supported releases to prevent potential exposure to vulnerabilities. To determine the support lifecycle for your software release, see Select a Product for Lifecycle Information. For more information about service packs for these software releases, see Lifecycle Supported Service Packs.

Customers who require custom support for older software must contact their Microsoft account team representative, their Technical Account Manager, or the appropriate Microsoft partner representative for custom support options. Customers without an Alliance, Premier, or Authorized Contract can contact their local Microsoft sales office. For contact information, visit the Microsoft Worldwide Information Web site, select the country in the Contact Information list, and then click Go to see a list of telephone numbers. When you call, ask to speak with the local Premier Support sales manager. For more information, see the Microsoft Support Lifecycle Policy FAQ.

Vulnerability Information

The following severity ratings assume the potential maximum impact of the vulnerability. For information regarding the likelihood, within 30 days of this security bulletin's release, of the exploitability of the vulnerability in relation to its severity rating and security impact, please see the Exploitability Index in the April bulletin summary. For more information, see Microsoft Exploitability Index.

Vulnerability Severity Rating and Maximum Security Impact by Affected Software
Affected SoftwareMicrosoft Internet Explorer 8 Developer Tools Vulnerability - CVE-2010-0811Microsoft WMITools ActiveX Control Vulnerability - CVE-2010-3973Microsoft Windows Messenger ActiveX Control Vulnerability - CVE-2011-1243Aggregate Severity Rating
Windows XP Service Pack 3 Critical 
Remote Code Execution[2]
Important 
Remote Code Execution
Critical 
Remote Code Execution
Critical
Windows XP Professional x64 Edition Service Pack 2 Critical 
Remote Code Execution[2]
Important 
Remote Code Execution
Critical 
Remote Code Execution
Critical
Windows Server 2003 Service Pack 2 Moderate 
Remote Code Execution[2]
Not applicableNot applicable Moderate
Windows Server 2003 x64 Edition Service Pack 2 Moderate 
Remote Code Execution[2]
Not applicableNot applicable Moderate
Windows Server 2003 with SP2 for Itanium-based SystemsNot applicableNot applicableNot applicable None
Windows Vista Service Pack 1 and Windows Vista Service Pack 2 Critical 
Remote Code Execution[2]
Not applicableNot applicable Critical
Windows Vista x64 Edition Service Pack 1 and Windows Vista x64 Edition Service Pack 2 Critical 
Remote Code Execution[2]
Not applicableNot applicable Critical
Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit Systems Service Pack 2** Moderate 
Remote Code Execution[2]
Not applicableNot applicable Moderate
Windows Server 2008 for x64-based Systems and Windows Server 2008 for x64-based Systems Service Pack 2** Moderate 
Remote Code Execution[2]
Not applicableNot applicable Moderate
Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for Itanium-based Systems Service Pack 2Not applicableNot applicableNot applicable None
Windows 7 for 32-bit Systems and Windows 7 for 32-bit Systems Service Pack 1 Critical 
Remote Code Execution
Not applicableNot applicable Critical
Windows 7 for x64-based Systems and Windows 7 for x64-based Systems Service Pack 1 Critical 
Remote Code Execution
Not applicableNot applicable Critical
Windows Server 2008 R2 for x64-based Systems and Windows Server 2008 R2 for x64-based Systems Service Pack 1** Moderate 
Remote Code Execution
Not applicableNot applicable Moderate
Windows Server 2008 R2 for Itanium-based Systems and Windows Server 2008 R2 for Itanium-based Systems Service Pack 1 Moderate 
Remote Code Execution
Not applicableNot applicable Moderate

[2]Internet Explorer 8 is not installed by default on this operating system. The severity rating only applies if Internet Explorer 8 is installed.

**Server Core installation not affected. The vulnerabilities addressed by this update do not affect supported editions of Windows Server 2008 or Windows Server 2008 R2 as indicated, when installed using the Server Core installation option. For more information on this installation option, see the TechNet articles, Managing a Server Core Installation and Servicing a Server Core Installation. Note that the Server Core installation option does not apply to certain editions of Windows Server 2008 and Windows Server 2008 R2; see Compare Server Core Installation Options.

A remote code execution vulnerability exists in the ActiveX control, Microsoft Internet Explorer 8 Developer Tools. An attacker could exploit the vulnerability by constructing a specially crafted Web page. When a user views the Web page, the vulnerability could allow remote code execution. An attacker who successfully exploited this vulnerability could gain the same user rights as the logged-on user.

To view this vulnerability as a standard entry in the Common Vulnerabilities and Exposures list, see CVE-2010-0811.

Mitigating Factors for Microsoft Internet Explorer 8 Developer Tools Vulnerability - CVE-2010-0811

Mitigation refers to a setting, common configuration, or general best-practice, existing in a default state, that could reduce the severity of exploitation of a vulnerability. The following mitigating factors may be helpful in your situation:

  • In a Web-based attack scenario, an attacker could host a Web site that contains a Web page that is used to exploit this vulnerability. In addition, compromised Web sites and Web sites that accept or host user-provided content or advertisements could contain specially crafted content that could exploit this vulnerability. In all cases, however, an attacker would have no way to force users to visit these Web sites. Instead, an attacker would have to convince users to visit the Web site, typically by getting them to click a link in an e-mail message or Instant Messenger message that takes users to the attacker's Web site.
  • An attacker who successfully exploited this vulnerability could gain the same user rights as the local user. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
  • By default, all supported versions of Microsoft Outlook, Microsoft Outlook Express, and Windows Mail open HTML e-mail messages in the Restricted sites zone, which disables script and ActiveX controls, removing the risk of an attacker being able to use this vulnerability to execute malicious code. If a user clicks a link in an e-mail message, the user could still be vulnerable to exploitation of this vulnerability through the Web-based attack scenario.
  • By default, Internet Explorer on Windows Server 2003, Windows Server 2008, and Windows Server 2008 R2 runs in a restricted mode that is known as Enhanced Security Configuration. This mode mitigates this vulnerability. See the FAQ section of this security update for more information about Internet Explorer Enhanced Security Configuration.

Workarounds for Microsoft Internet Explorer 8 Developer Tools Vulnerability - CVE-2010-0811

Workaround refers to a setting or configuration change that does not correct the underlying vulnerability but would help block known attack vectors before you apply the update. Microsoft has tested the following workarounds and states in the discussion whether a workaround reduces functionality:

  • Prevent COM objects from running in Internet Explorer

    You can disable attempts to instantiate a COM object in Internet Explorer by setting the kill bit for the control in the registry.

    Warning If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

    For detailed steps that you can use to prevent a control from running in Internet Explorer, see Microsoft Knowledge Base Article 240797. Follow the steps in this article to create a Compatibility Flags value in the registry to prevent a COM object from being instantiated in Internet Explorer.

    To set the kill bit for a CLSID with a value of {1a6fe369-f28c-4ad9-a3e6-2bcb50807cf1}, paste the following text in a text editor such as Notepad. Then, save the file by using the .reg file name extension.

    Windows Registry Editor Version 5.00
    [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{1a6fe369-f28c-4ad9-a3e6-2bcb50807cf1}]
    "Compatibility Flags"=dword:00000400

    [HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\ActiveX Compatibility\{1a6fe369-f28c-4ad9-a3e6-2bcb50807cf1}]
    "Compatibility Flags"=dword:00000400

    You can apply this .reg file to individual systems by double-clicking it. You can also apply it across domains by using Group Policy. For more information about Group Policy, see the TechNet article, Group Policy collection.

    Note You must restart Internet Explorer for your changes to take effect.

    Impact of Workaround. There is no impact as long as the object is not intended to be used in Internet Explorer.

    How to undo the workaround. Delete the registry keys previously added in implementing this workaround.

  • Set Internet and Local intranet security zone settings to "High" to block ActiveX Controls and Active Scripting in these zones

    You can help protect against exploitation of this vulnerability by changing your settings for the Internet security zone to block ActiveX controls and Active Scripting. You can do this by setting your browser security to High.

    To raise the browsing security level in Internet Explorer, perform the following steps:

    1. On the Internet Explorer Tools menu, click Internet Options.
    2. In the Internet Options dialog box, click the Security tab, and then click the Internet icon.
    3. Under Security level for this zone, move the slider to High. This sets the security level for all Web sites you visit to High.

    Note If no slider is visible, click Default Level, and then move the slider to High.

    Note Setting the level to High may cause some Web sites to work incorrectly. If you have difficulty using a Web site after you change this setting, and you are sure the site is safe to use, you can add that site to your list of trusted sites. This will allow the site to work correctly even with the security setting set to High.

    Impact of workaround. There are side effects to blocking ActiveX Controls and Active Scripting. Many Web sites that are on the Internet or on an intranet use ActiveX or Active Scripting to provide additional functionality. For example, an online e-commerce site or banking site may use ActiveX Controls to provide menus, ordering forms, or even account statements. Blocking ActiveX Controls or Active Scripting is a global setting that affects all Internet and intranet sites. If you do not want to block ActiveX Controls or Active Scripting for such sites, use the steps outlined in "Add sites that you trust to the Internet Explorer Trusted sites zone".

    Add sites that you trust to the Internet Explorer Trusted sites zone

    After you set Internet Explorer to block ActiveX controls and Active Scripting in the Internet zone and in the Local intranet zone, you can add sites that you trust to the Internet Explorer Trusted sites zone. This will allow you to continue to use trusted Web sites exactly as you do today, while helping to protect yourself from this attack on untrusted sites. We recommend that you add only sites that you trust to the Trusted sites zone.

    To do this, perform the following steps:

    1. In Internet Explorer, click Tools, click Internet Options, and then click the Security tab.
    2. In the Select a Web content zone to specify its current security settings box, click Trusted Sites, and then click Sites.
    3. If you want to add sites that do not require an encrypted channel, click to clear the Require server verification (https:) for all sites in this zone check box.
    4. In the Add this Web site to the zone box, type the URL of a site that you trust, and then click Add.
    5. Repeat these steps for each site that you want to add to the zone.
    6. Click OK two times to accept the changes and return to Internet Explorer.

    Note Add any sites that you trust not to take malicious action on your system. Two in particular that you may want to add are *.windowsupdate.microsoft.com and *.update.microsoft.com. These are the sites that will host the update, and it requires an ActiveX Control to install the update.

  • Configure Internet Explorer to prompt before running Active Scripting or to disable Active Scripting in the Internet and Local intranet security zone

    You can help protect against exploitation of this vulnerability by changing your settings to prompt before running Active Scripting or to disable Active Scripting in the Internet and Local intranet security zone. To do this, perform the following steps:

    1. In Internet Explorer, click Internet Options on the Tools menu.
    2. Click the Security tab.
    3. Click Internet, and then click Custom Level.
    4. Under Settings, in the Scripting section, under Active Scripting, click Prompt or Disable, and then click OK.
    5. Click Local intranet, and then click Custom Level.
    6. Under Settings, in the Scripting section, under Active Scripting, click Prompt or Disable, and then click OK.
    7. Click OK two times to return to Internet Explorer.

    Note Disabling Active Scripting in the Internet and Local intranet security zones may cause some Web sites to work incorrectly. If you have difficulty using a Web site after you change this setting, and you are sure the site is safe to use, you can add that site to your list of trusted sites. This will allow the site to work correctly.

    Impact of workaround. There are side effects to prompting before running Active Scripting. Many Web sites that are on the Internet or on an intranet use Active Scripting to provide additional functionality. For example, an online e-commerce site or banking site may use Active Scripting to provide menus, ordering forms, or even account statements. Prompting before running Active Scripting is a global setting that affects all Internet and intranet sites. You will be prompted frequently when you enable this workaround. For each prompt, if you feel you trust the site that you are visiting, click Yes to run Active Scripting. If you do not want to be prompted for all these sites, use the steps outlined in "Add sites that you trust to the Internet Explorer Trusted sites zone".

    Add sites that you trust to the Internet Explorer Trusted sites zone

    After you set Internet Explorer to require a prompt before it runs ActiveX controls and Active Scripting in the Internet zone and in the Local intranet zone, you can add sites that you trust to the Internet Explorer Trusted sites zone. This will allow you to continue to use trusted Web sites exactly as you do today, while helping to protect you from this attack on untrusted sites. We recommend that you add only sites that you trust to the Trusted sites zone.

    To do this, perform the following steps:

    1. In Internet Explorer, click Tools, click Internet Options, and then click the Security tab.
    2. In the Select a Web content zone to specify its current security settings box, click Trusted Sites, and then click Sites.
    3. If you want to add sites that do not require an encrypted channel, click to clear the Require server verification (https:) for all sites in this zone check box.
    4. In the Add this Web site to the zone box, type the URL of a site that you trust, and then click Add.
    5. Repeat these steps for each site that you want to add to the zone.
    6. Click OK two times to accept the changes and return to Internet Explorer.

    Note Add any sites that you trust not to take malicious action on your system. Two in particular that you may want to add are *.windowsupdate.microsoft.com and *.update.microsoft.com. These are the sites that will host the update, and it requires an ActiveX Control to install the update.

FAQ for Microsoft Internet Explorer 8 Developer Tools Vulnerability - CVE-2010-0811

What is the scope of the vulnerability? 
This is a remote code execution vulnerability. An attacker who successfully exploited this vulnerability could take complete control of an affected system.

What causes the vulnerability? 
When the ActiveX control is used in Internet Explorer, the control may corrupt the system state in such a way that an attacker could execute arbitrary code.

What might an attacker use the vulnerability to do? 
An attacker who successfully exploited this vulnerability could gain the same user rights as the local user. If the user is logged on with administrative user rights, an attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.

How could an attacker exploit the vulnerability? 
An attacker could host a specially crafted Web site that is designed to exploit this vulnerability through Internet Explorer and then convince a user to view the Web site. This can also include compromised Web sites and Web sites that accept or host user-provided content or advertisements. These Web sites could contain specially crafted content that could exploit this vulnerability. In all cases, however, an attacker would have no way to force users to visit these Web sites. Instead, an attacker would have to convince users to visit the Web site, typically by getting them to click a link in an e-mail message or in an Instant Messenger request that takes users to the attacker's Web site. It could also be possible to display specially crafted Web content by using banner advertisements or by using other methods to deliver Web content to affected systems.

What is the component affected by the vulnerability? 
The vulnerability affects the Microsoft Internet Explorer 8 Developer Tools control.

Are the downloadable Developer Tools for Internet Explorer 6 and Internet Explorer 7 affected by this issue? 
No, the downloadable Developer Tools for Internet Explorer 6 and Internet Explorer 7 are not affected by this issue.

What are the Microsoft Internet Explorer 8 Developer Tools? 
The Microsoft Internet Explorer 8 Developer Tools enable Web site developers to quickly debug Microsoft JScript, investigate behavior specific to Internet Explorer, or prototype new designs or solutions on-the-fly. For more information about the IE8 Tools, see the MSDN article, Discovering Internet Explorer Developer Tools.

What systems are primarily at risk from the vulnerability? 
This vulnerability in the Microsoft Internet Explorer 8 Developer Tools control requires that a user be logged on and visiting a Web site for any malicious action to occur. Therefore, any systems where the Microsoft Internet Explorer 8 Developer Tools are installed and where Internet Explorer is used frequently, such as workstations or terminal servers, are at the most risk from this vulnerability.

I am running Internet Explorer for Windows Server 2003, Windows Server 2008, or Windows Server 2008 R2. Does this mitigate this vulnerability? 
Yes. By default, Internet Explorer on Windows Server 2003, Windows Server 2008, and Windows Server 2008 R2 runs in a restricted mode that is known as Enhanced Security Configuration. Enhanced Security Configuration is a group of preconfigured settings in Internet Explorer that can reduce the likelihood of a user or administrator downloading and running specially crafted Web content on a server. This is a mitigating factor for Web sites that you have not added to the Internet Explorer Trusted sites zone.

What does the update do? 
The update disables the Microsoft ActiveX controls by setting the kill bit for the Class Identifiers hosted in the library files listed below:

Class IdentifierFileDescription
{1a6fe369-f28c-4ad9-a3e6-2bcb50807cf1}iedvtool.dllMicrosoft Internet Explorer 8 Developer Tools

Note Setting this kill bit addresses variants of the CVE-2010-0811 vulnerability first described in Microsoft Security Bulletin MS10-034.

When this security bulletin was issued, had this vulnerability been publicly disclosed? 
No. Microsoft received information about this vulnerability through coordinated vulnerability disclosure.

When this security bulletin was issued, had Microsoft received any reports that this vulnerability was being exploited? 
No. Microsoft had not received any information to indicate that this vulnerability had been publicly used to attack customers when this security bulletin was originally issued.

A remote code execution vulnerability exists in one of the Microsoft WMITools ActiveX controls. An attacker could exploit the vulnerability by constructing a specially crafted Web page. When a user views the Web page, the vulnerability could allow remote code execution. An attacker who successfully exploited this vulnerability could gain the same user rights as the logged-on user.

To view this vulnerability as a standard entry in the Common Vulnerabilities and Exposures list, see CVE-2010-3973.

Mitigating Factors for Microsoft WMITools ActiveX Control Vulnerability - CVE-2010-3973

Mitigation refers to a setting, common configuration, or general best-practice, existing in a default state, that could reduce the severity of exploitation of a vulnerability. The following mitigating factors may be helpful in your situation:

  • The WMI Administrative Tools package is not installed by default.
  • The WMITools ActiveX controls are not signed. By default, Internet Explorer blocks controls that are unsigned. For more information, see the MSDN article, ActiveX Blocking.
  • In a Web-based attack scenario, an attacker could host a Web site that contains a Web page that is used to exploit this vulnerability. In addition, compromised Web sites and Web sites that accept or host user-provided content or advertisements could contain specially crafted content that could exploit this vulnerability. In all cases, however, an attacker would have no way to force users to visit these Web sites. Instead, an attacker would have to convince users to visit the Web site, typically by getting them to click a link in an e-mail message or Instant Messenger message that takes users to the attacker's Web site.
  • An attacker who successfully exploited this vulnerability could gain the same user rights as the local user. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
  • By default, all supported versions of Microsoft Outlook, Microsoft Outlook Express, and Windows Mail open HTML e-mail messages in the Restricted sites zone, which disables script and ActiveX controls, removing the risk of an attacker being able to use this vulnerability to execute malicious code. If a user clicks a link in an e-mail message, the user could still be vulnerable to exploitation of this vulnerability through the Web-based attack scenario.

Workarounds for Microsoft WMITools ActiveX Control Vulnerability - CVE-2010-3973

Workaround refers to a setting or configuration change that does not correct the underlying vulnerability but would help block known attack vectors before you apply the update. Microsoft has tested the following workarounds and states in the discussion whether a workaround reduces functionality.

  • Prevent COM objects from running in Internet Explorer

    You can disable attempts to instantiate a COM object in Internet Explorer by setting the kill bits for the control in the registry.

    Warning If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

    For detailed steps that you can use to prevent a control from running in Internet Explorer, see Microsoft Knowledge Base Article 240797. Follow the steps in this article to create a Compatibility Flags value in the registry to prevent a COM object from being instantiated in Internet Explorer.

    To set the kill bits for CLSIDs with values of {2745E5F5-D234-11D0-847A-00C04FD7BB08}, {FF371BF4-213D-11D0-95F3-00C04FD9B15B}, and {AC146530-87A5-11D1-ADBD-00AA00B8E05A}, paste the following text in a text editor such as Notepad. Then, save the file by using the .reg file name extension.

    Windows Registry Editor Version 5.00
    [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{2745E5F5-D234-11D0-847A-00C04FD7BB08}]
    "Compatibility Flags"=dword:00000400

    [HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\ActiveX Compatibility\{2745E5F5-D234-11D0-847A-00C04FD7BB08}]
    "Compatibility Flags"=dword:00000400

    [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{FF371BF4-213D-11D0-95F3-00C04FD9B15B}]
    "Compatibility Flags"=dword:00000400

    [HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\ActiveX Compatibility\{FF371BF4-213D-11D0-95F3-00C04FD9B15B}]
    "Compatibility Flags"=dword:00000400

    [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{AC146530-87A5-11D1-ADBD-00AA00B8E05A}]
    "Compatibility Flags"=dword:00000400

    [HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\ActiveX Compatibility\{AC146530-87A5-11D1-ADBD-00AA00B8E05A}]
    "Compatibility Flags"=dword:00000400

    You can apply this .reg file to individual systems by double-clicking it. You can also apply it across domains by using Group Policy. For more information about Group Policy, see the TechNet article, Group Policy collection.

    Note You must restart Internet Explorer for your changes to take effect.

    Impact of Workaround. There is no impact as long as the object is not intended to be used in Internet Explorer.

    How to undo the workaround. Delete the registry keys previously added in implementing this workaround.

  • Set Internet and Local intranet security zone settings to "High" to block ActiveX Controls and Active Scripting in these zones

    You can help protect against exploitation of this vulnerability by changing your settings for the Internet security zone to block ActiveX controls and Active Scripting. You can do this by setting your browser security to High.

    To raise the browsing security level in Internet Explorer, perform the following steps:

    1. On the Internet Explorer Tools menu, click Internet Options.
    2. In the Internet Options dialog box, click the Security tab, and then click the Internet icon.
    3. Under Security level for this zone, move the slider to High. This sets the security level for all Web sites you visit to High.

    Note If no slider is visible, click Default Level, and then move the slider to High.

    Note Setting the level to High may cause some Web sites to work incorrectly. If you have difficulty using a Web site after you change this setting, and you are sure the site is safe to use, you can add that site to your list of trusted sites. This will allow the site to work correctly even with the security setting set to High.

    Impact of workaround. There are side effects to blocking ActiveX Controls and Active Scripting. Many Web sites that are on the Internet or on an intranet use ActiveX or Active Scripting to provide additional functionality. For example, an online e-commerce site or banking site may use ActiveX Controls to provide menus, ordering forms, or even account statements. Blocking ActiveX Controls or Active Scripting is a global setting that affects all Internet and intranet sites. If you do not want to block ActiveX Controls or Active Scripting for such sites, use the steps outlined in "Add sites that you trust to the Internet Explorer Trusted sites zone".

    Add sites that you trust to the Internet Explorer Trusted sites zone

    After you set Internet Explorer to block ActiveX controls and Active Scripting in the Internet zone and in the Local intranet zone, you can add sites that you trust to the Internet Explorer Trusted sites zone. This will allow you to continue to use trusted Web sites exactly as you do today, while helping to protect yourself from this attack on untrusted sites. We recommend that you add only sites that you trust to the Trusted sites zone.

    To do this, perform the following steps:

    1. In Internet Explorer, click Tools, click Internet Options, and then click the Security tab.
    2. In the Select a Web content zone to specify its current security settings box, click Trusted Sites, and then click Sites.
    3. If you want to add sites that do not require an encrypted channel, click to clear the Require server verification (https:) for all sites in this zone check box.
    4. In the Add this Web site to the zone box, type the URL of a site that you trust, and then click Add.
    5. Repeat these steps for each site that you want to add to the zone.
    6. Click OK two times to accept the changes and return to Internet Explorer.

    Note Add any sites that you trust not to take malicious action on your system. Two in particular that you may want to add are *.windowsupdate.microsoft.com and *.update.microsoft.com. These are the sites that will host the update, and it requires an ActiveX Control to install the update.

  • Configure Internet Explorer to prompt before running Active Scripting or to disable Active Scripting in the Internet and Local intranet security zone

    You can help protect against exploitation of this vulnerability by changing your settings to prompt before running Active Scripting or to disable Active Scripting in the Internet and Local intranet security zone. To do this, perform the following steps:

    1. In Internet Explorer, click Internet Options on the Tools menu.
    2. Click the Security tab.
    3. Click Internet, and then click Custom Level.
    4. Under Settings, in the Scripting section, under Active Scripting, click Prompt or Disable, and then click OK.
    5. Click Local intranet, and then click Custom Level.
    6. Under Settings, in the Scripting section, under Active Scripting, click Prompt or Disable, and then click OK.
    7. Click OK two times to return to Internet Explorer.

    Note Disabling Active Scripting in the Internet and Local intranet security zones may cause some Web sites to work incorrectly. If you have difficulty using a Web site after you change this setting, and you are sure the site is safe to use, you can add that site to your list of trusted sites. This will allow the site to work correctly.

    Impact of workaround. There are side effects to prompting before running Active Scripting. Many Web sites that are on the Internet or on an intranet use Active Scripting to provide additional functionality. For example, an online e-commerce site or banking site may use Active Scripting to provide menus, ordering forms, or even account statements. Prompting before running Active Scripting is a global setting that affects all Internet and intranet sites. You will be prompted frequently when you enable this workaround. For each prompt, if you feel you trust the site that you are visiting, click Yes to run Active Scripting. If you do not want to be prompted for all these sites, use the steps outlined in "Add sites that you trust to the Internet Explorer Trusted sites zone".

    Add sites that you trust to the Internet Explorer Trusted sites zone

    After you set Internet Explorer to require a prompt before it runs ActiveX controls and Active Scripting in the Internet zone and in the Local intranet zone, you can add sites that you trust to the Internet Explorer Trusted sites zone. This will allow you to continue to use trusted Web sites exactly as you do today, while helping to protect you from this attack on untrusted sites. We recommend that you add only sites that you trust to the Trusted sites zone.

    To do this, perform the following steps:

    1. In Internet Explorer, click Tools, click Internet Options, and then click the Security tab.
    2. In the Select a Web content zone to specify its current security settings box, click Trusted Sites, and then click Sites.
    3. If you want to add sites that do not require an encrypted channel, click to clear the Require server verification (https:) for all sites in this zone check box.
    4. In the Add this Web site to the zone box, type the URL of a site that you trust, and then click Add.
    5. Repeat these steps for each site that you want to add to the zone.
    6. Click OK two times to accept the changes and return to Internet Explorer.

    Note Add any sites that you trust not to take malicious action on your system. Two in particular that you may want to add are *.windowsupdate.microsoft.com and *.update.microsoft.com. These are the sites that will host the update, and it requires an ActiveX Control to install the update.

FAQ for Microsoft WMITools ActiveX Control Vulnerability - CVE-2010-3973

What is the scope of the vulnerability? 
This is a remote code execution vulnerability. An attacker who successfully exploited this vulnerability could take complete control of an affected system.

What causes the vulnerability? 
When the ActiveX control is used in Internet Explorer, the control may corrupt the system state in such a way that an attacker could execute arbitrary code.

What might an attacker use the vulnerability to do? 
An attacker who successfully exploited this vulnerability could gain the same user rights as the logged-on user. If a user is logged on with administrative user rights, an attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.

How could an attacker exploit the vulnerability? 
An attacker could host a specially crafted Web site that is designed to exploit this vulnerability through Internet Explorer and then convince a user to view the Web site. This can also include compromised Web sites and Web sites that accept or host user-provided content or advertisements. These Web sites could contain specially crafted content that could exploit this vulnerability. In all cases, however, an attacker would have no way to force users to visit these Web sites. Instead, an attacker would have to convince users to visit the Web site, typically by getting them to click a link in an e-mail message or in an Instant Messenger request that takes users to the attacker's Web site. It could also be possible to display specially crafted Web content by using banner advertisements or by using other methods to deliver Web content to affected systems.

What systems are primarily at risk from the vulnerability? 
This vulnerability in one of the Microsoft WMITools ActiveX controls requires that a user be logged on and visiting a Web site for any malicious action to occur. Therefore, any systems where Microsoft WMITools ActiveX controls are installed and where Internet Explorer is used frequently, such as workstations or terminal servers, are at the most risk from this vulnerability.

What does the update do? 
The update disables the Microsoft ActiveX control by setting the kill bit for the Class Identifiers hosted in the library files listed below:

Class IdentifierFileDescription
{2745E5F5-D234-11D0-847A-00C04FD7BB08}WBEMSingleView.OCXMicrosoft WMITools ActiveX Control
{FF371BF4-213D-11D0-95F3-00C04FD9B15B}WBEMMultiView.OCXMicrosoft WMITools ActiveX Control
{AC146530-87A5-11D1-ADBD-00AA00B8E05A}WBEMEventList.OCXMicrosoft WMITools ActiveX Control

Is this ActiveX Control digitally signed? 
No, this ActiveX control is not digitally signed. For more information about ActiveX Control signature, see the MSDN blog post, Everything you need to know about Authenticode Code Signing.

When this security bulletin was issued, had this vulnerability been publicly disclosed? 
Yes. This vulnerability has been publicly disclosed. It has been assigned Common Vulnerability and Exposure number CVE-2010-3973.

When this security bulletin was issued, had Microsoft received any reports that this vulnerability was being exploited? 
No. Microsoft had not received any information to indicate that this vulnerability had been publicly used to attack customers when this security bulletin was originally issued.

Does applying this security update help protect customers from the code, published publicly, that could attempt to exploit this vulnerability? 
Yes. This security update addresses the vulnerability that potentially could be exploited by using the published proof of concept code. The vulnerability that has been addressed has been assigned Common Vulnerability and Exposure number CVE-2010-3973.

A remote code execution vulnerability exists in the Microsoft Windows Messenger ActiveX Control. An attacker could exploit the vulnerability by constructing a specially crafted Web page. When a user views the Web page, the vulnerability could allow remote code execution. An attacker who successfully exploited this vulnerability could gain the same user rights as the logged-on user.

To view this vulnerability as a standard entry in the Common Vulnerabilities and Exposures list, see CVE-2011-1243.

Mitigating Factors for Microsoft Windows Messenger ActiveX Control Vulnerability - CVE-2011-1243

Mitigation refers to a setting, common configuration, or general best-practice, existing in a default state, that could reduce the severity of exploitation of a vulnerability. The following mitigating factors may be helpful in your situation:

  • In a Web-based attack scenario, an attacker could host a Web site that contains a Web page that is used to exploit this vulnerability. In addition, compromised Web sites and Web sites that accept or host user-provided content or advertisements could contain specially crafted content that could exploit this vulnerability. In all cases, however, an attacker would have no way to force users to visit these Web sites. Instead, an attacker would have to convince users to visit the Web site, typically by getting them to click a link in an e-mail message or Instant Messenger message that takes users to the attacker's Web site.
  • An attacker who successfully exploited this vulnerability could gain the same user rights as the local user. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
  • By default, all supported versions of Microsoft Outlook, Microsoft Outlook Express, and Windows Mail open HTML e-mail messages in the Restricted sites zone, which disables script and ActiveX controls, removing the risk of an attacker being able to use this vulnerability to execute malicious code. If a user clicks a link in an e-mail message, the user could still be vulnerable to exploitation of this vulnerability through the Web-based attack scenario.

Workarounds for Microsoft Windows Messenger ActiveX Control Vulnerability - CVE-2011-1243

Workaround refers to a setting or configuration change that does not correct the underlying vulnerability but would help block known attack vectors before you apply the update. Microsoft has tested the following workarounds and states in the discussion whether a workaround reduces functionality:

  • Prevent COM objects from running in Internet Explorer

    You can disable attempts to instantiate a COM object in Internet Explorer by setting the kill bit for the control in the registry.

    Warning If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

    For detailed steps that you can use to prevent a control from running in Internet Explorer, see Microsoft Knowledge Base Article 240797. Follow the steps in this article to create a Compatibility Flags value in the registry to prevent a COM object from being instantiated in Internet Explorer.

    To set the kill bit for a CLSID with a value of {FB7199AB-79BF-11d2-8D94-0000F875C541}, paste the following text in a text editor such as Notepad. Then, save the file by using the .reg file name extension.

    Windows Registry Editor Version 5.00
    [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{FB7199AB-79BF-11d2-8D94-0000F875C541}]
    "Compatibility Flags"=dword:00000400

    [HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\ActiveX Compatibility\{FB7199AB-79BF-11d2-8D94-0000F875C541}]
    "Compatibility Flags"=dword:00000400

    You can apply this .reg file to individual systems by double-clicking it. You can also apply it across domains by using Group Policy. For more information about Group Policy, see the TechNet article, Group Policy collection.

    Note You must restart Internet Explorer for your changes to take effect.

    Impact of Workaround. There is no impact as long as the object is not intended to be used in Internet Explorer.

    How to undo the workaround. Delete the registry keys previously added in implementing this workaround.

  • Set Internet and Local intranet security zone settings to "High" to block ActiveX Controls and Active Scripting in these zones

    You can help protect against exploitation of this vulnerability by changing your settings for the Internet security zone to block ActiveX controls and Active Scripting. You can do this by setting your browser security to High.

    To raise the browsing security level in Internet Explorer, perform the following steps:

    1. On the Internet Explorer Tools menu, click Internet Options.
    2. In the Internet Options dialog box, click the Security tab, and then click the Internet icon.
    3. Under Security level for this zone, move the slider to High. This sets the security level for all Web sites you visit to High.

    Note If no slider is visible, click Default Level, and then move the slider to High.

    Note Setting the level to High may cause some Web sites to work incorrectly. If you have difficulty using a Web site after you change this setting, and you are sure the site is safe to use, you can add that site to your list of trusted sites. This will allow the site to work correctly even with the security setting set to High.

    Impact of workaround. There are side effects to blocking ActiveX Controls and Active Scripting. Many Web sites that are on the Internet or on an intranet use ActiveX or Active Scripting to provide additional functionality. For example, an online e-commerce site or banking site may use ActiveX Controls to provide menus, ordering forms, or even account statements. Blocking ActiveX Controls or Active Scripting is a global setting that affects all Internet and intranet sites. If you do not want to block ActiveX Controls or Active Scripting for such sites, use the steps outlined in "Add sites that you trust to the Internet Explorer Trusted sites zone".

    Add sites that you trust to the Internet Explorer Trusted sites zone

    After you set Internet Explorer to block ActiveX controls and Active Scripting in the Internet zone and in the Local intranet zone, you can add sites that you trust to the Internet Explorer Trusted sites zone. This will allow you to continue to use trusted Web sites exactly as you do today, while helping to protect yourself from this attack on untrusted sites. We recommend that you add only sites that you trust to the Trusted sites zone.

    To do this, perform the following steps:

    1. In Internet Explorer, click Tools, click Internet Options, and then click the Security tab.
    2. In the Select a Web content zone to specify its current security settings box, click Trusted Sites, and then click Sites.
    3. If you want to add sites that do not require an encrypted channel, click to clear the Require server verification (https:) for all sites in this zone check box.
    4. In the Add this Web site to the zone box, type the URL of a site that you trust, and then click Add.
    5. Repeat these steps for each site that you want to add to the zone.
    6. Click OK two times to accept the changes and return to Internet Explorer.

    Note Add any sites that you trust not to take malicious action on your system. Two in particular that you may want to add are *.windowsupdate.microsoft.com and *.update.microsoft.com. These are the sites that will host the update, and it requires an ActiveX Control to install the update.

  • Configure Internet Explorer to prompt before running Active Scripting or to disable Active Scripting in the Internet and Local intranet security zone

    You can help protect against exploitation of this vulnerability by changing your settings to prompt before running Active Scripting or to disable Active Scripting in the Internet and Local intranet security zone. To do this, perform the following steps:

    1. In Internet Explorer, click Internet Options on the Tools menu.
    2. Click the Security tab.
    3. Click Internet, and then click Custom Level.
    4. Under Settings, in the Scripting section, under Active Scripting, click Prompt or Disable, and then click OK.
    5. Click Local intranet, and then click Custom Level.
    6. Under Settings, in the Scripting section, under Active Scripting, click Prompt or Disable, and then click OK.
    7. Click OK two times to return to Internet Explorer.

    Note Disabling Active Scripting in the Internet and Local intranet security zones may cause some Web sites to work incorrectly. If you have difficulty using a Web site after you change this setting, and you are sure the site is safe to use, you can add that site to your list of trusted sites. This will allow the site to work correctly.

    Impact of workaround. There are side effects to prompting before running Active Scripting. Many Web sites that are on the Internet or on an intranet use Active Scripting to provide additional functionality. For example, an online e-commerce site or banking site may use Active Scripting to provide menus, ordering forms, or even account statements. Prompting before running Active Scripting is a global setting that affects all Internet and intranet sites. You will be prompted frequently when you enable this workaround. For each prompt, if you feel you trust the site that you are visiting, click Yes to run Active Scripting. If you do not want to be prompted for all these sites, use the steps outlined in "Add sites that you trust to the Internet Explorer Trusted sites zone".

    Add sites that you trust to the Internet Explorer Trusted sites zone

    After you set Internet Explorer to require a prompt before it runs ActiveX controls and Active Scripting in the Internet zone and in the Local intranet zone, you can add sites that you trust to the Internet Explorer Trusted sites zone. This will allow you to continue to use trusted Web sites exactly as you do today, while helping to protect you from this attack on untrusted sites. We recommend that you add only sites that you trust to the Trusted sites zone.

    To do this, perform the following steps:

    1. In Internet Explorer, click Tools, click Internet Options, and then click the Security tab.
    2. In the Select a Web content zone to specify its current security settings box, click Trusted Sites, and then click Sites.
    3. If you want to add sites that do not require an encrypted channel, click to clear the Require server verification (https:) for all sites in this zone check box.
    4. In the Add this Web site to the zone box, type the URL of a site that you trust, and then click Add.
    5. Repeat these steps for each site that you want to add to the zone.
    6. Click OK two times to accept the changes and return to Internet Explorer.

    Note Add any sites that you trust not to take malicious action on your system. Two in particular that you may want to add are *.windowsupdate.microsoft.com and *.update.microsoft.com. These are the sites that will host the update, and it requires an ActiveX Control to install the update.

FAQ for Microsoft Windows Messenger ActiveX Control Vulnerability - CVE-2011-1243

What is the scope of the vulnerability? 
This is a remote code execution vulnerability. An attacker who successfully exploited this vulnerability could take complete control of an affected system.

What causes the vulnerability? 
When the ActiveX control is used in Internet Explorer, the control may corrupt the system state in such a way that an attacker could execute arbitrary code.

What might an attacker use the vulnerability to do? 
An attacker who successfully exploited this vulnerability could gain the same user rights as the logged-on user. If a user is logged on with administrative user rights, an attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.

How could an attacker exploit the vulnerability? 
An attacker could host a specially crafted Web site that is designed to exploit this vulnerability through Internet Explorer and then convince a user to view the Web site. This can also include compromised Web sites and Web sites that accept or host user-provided content or advertisements. These Web sites could contain specially crafted content that could exploit this vulnerability. In all cases, however, an attacker would have no way to force users to visit these Web sites. Instead, an attacker would have to convince users to visit the Web site, typically by getting them to click a link in an e-mail message or in an Instant Messenger request that takes users to the attacker's Web site. It could also be possible to display specially crafted Web content by using banner advertisements or by using other methods to deliver Web content to affected systems.

What systems are primarily at risk from the vulnerability? 
This vulnerability in the Microsoft Windows Messenger ActiveX control requires that a user be logged on and visiting a Web site for any malicious action to occur. Therefore, any systems where the Microsoft Windows Messenger ActiveX control is installed and where Internet Explorer is used frequently, such as workstations or terminal servers, are at the most risk from this vulnerability.

What does the update do? 
The update disables the Microsoft ActiveX control by setting the kill bit for the Class Identifiers hosted in the library files listed below:

Class IdentifierFileDescription
{FB7199AB-79BF-11d2-8D94-0000F875C541}msgsc.dllMicrosoft Windows Messenger ActiveX Control

When this security bulletin was issued, had this vulnerability been publicly disclosed? 
No. Microsoft received information about this vulnerability through coordinated vulnerability disclosure.

When this security bulletin was issued, had Microsoft received any reports that this vulnerability was being exploited? 
No. Microsoft had not received any information to indicate that this vulnerability had been publicly used to attack customers when this security bulletin was originally issued.

This update includes kill bits to prevent the following ActiveX controls from being run in Internet Explorer:

  • Oracle has requested a kill bit for an ActiveX control, Java Deployment Toolkit. For more information regarding security issues in the Java Deployment Toolkit ActiveX control, please see Oracle Security Alert CVE-2010-0886. The class identifier for this ActiveX control is:
    • {CAFEEFAC-DEC7-0000-0000-ABCDEFFEDCBA}
  • CA has released a security advisory regarding an advisory for an ActiveX control, WebScan. If you have any questions or concerns regarding the WebScan ActiveX control, please contact CA at http://www.ca.com. Please see the security bulletin from CA for more information. The class identifier (CLSID) for this ActiveX control is:
    • {7B297BFD-85E4-4092-B2AF-16A91B2EA103}
  • IBM has requested a kill bit for the ActiveX control for the "Rational Suite License ActiveX Control." If you have any questions or concerns regarding Rational Suite License ActiveX control, please contact IBM at http://www.ibm.com. The class identifiers (CLSID) for this ActiveX control are:
    • {4918D1BD-B497-4f2f-A429-3C3CD74694FE}
    • {B3F90F4F-B521-4c76-BE28-DB569320CB8F}
    • {4F496A52-13F7-483d-B5E2-0FC4AA567749}
    • {FA44198C-E0B3-4f10-8B77-F646EC7CE684}
    • {83F0C8F0-4900-4909-A0AD-A5BAAC432739}
    • {29851043-AA76-4efd-9232-4914DD0AD4A1}
    • {8469A9DE-A3BF-4218-A1D2-F19AA9EA1617}
    • {C679DECC-5289-4856-B504-74B11ADD424A}
    • {2C37C480-CEE3-11D1-82C3-0060089253D0}
    • {53655704-5956-11D3-91AA-005004B34F28}
    • {687F154E-1099-11D4-91F9-005004B34F28}
    • {6F225D94-9318-11D4-9223-005004B34F28}

Update Information

Security Central

Manage the software and security updates you need to deploy to the servers, desktop, and mobile systems in your organization. For more information see the TechNet Update Management Center. The Microsoft TechNet Security Web site provides additional information about security in Microsoft products.

Security updates are available from Microsoft Update and Windows Update. Security updates are also available from the Microsoft Download Center. You can find them most easily by doing a keyword search for "security update."

Finally, security updates can be downloaded from the Microsoft Update Catalog. The Microsoft Update Catalog provides a searchable catalog of content made available through Windows Update and Microsoft Update, including security updates, drivers and service packs. By searching using the security bulletin number (such as, "MS07-036"), you can add all of the applicable updates to your basket (including different languages for an update), and download to the folder of your choosing. For more information about the Microsoft Update Catalog, see the Microsoft Update Catalog FAQ.

Detection and Deployment Guidance

Microsoft provides detection and deployment guidance for security updates. This guidance contains recommendations and information that can help IT professionals understand how to use various tools for detection and deployment of security updates. For more information, see Microsoft Knowledge Base Article 961747.

Microsoft Baseline Security Analyzer

Microsoft Baseline Security Analyzer (MBSA) allows administrators to scan local and remote systems for missing security updates as well as common security misconfigurations. For more information about MBSA, visit Microsoft Baseline Security Analyzer.

The following table provides the MBSA detection summary for this security update.

Software MBSA
Windows XP Service Pack 3Yes
Windows XP Professional x64 Edition Service Pack 2Yes
Windows Server 2003 Service Pack 2Yes
Windows Server 2003 x64 Edition Service Pack 2Yes
Windows Server 2003 with SP2 for Itanium-based SystemsYes
Windows Vista Service Pack 1 and Windows Vista Service Pack 2Yes
Windows Vista x64 Edition Service Pack 1 and Windows Vista x64 Edition Service Pack 2Yes
Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit Systems Service Pack 2Yes
Windows Server 2008 for x64-based Systems and Windows Server 2008 for x64-based Systems Service Pack 2Yes
Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for Itanium-based Systems Service Pack 2Yes
Windows 7 for 32-bit Systems and Windows 7 for 32-bit Systems Service Pack 1Yes
Windows 7 for x64-based Systems and Windows 7 for x64-based Systems Service Pack 1Yes
Windows Server 2008 R2 for x64-based Systems and Windows Server 2008 R2 for x64-based Systems Service Pack 1Yes
Windows Server 2008 R2 for Itanium-based Systems and Windows Server 2008 R2 for Itanium-based Systems Service Pack 1Yes

Note For customers using legacy software not supported by the latest release of MBSA, Microsoft Update, and Windows Server Update Services, please visit Microsoft Baseline Security Analyzer and reference the Legacy Product Support section on how to create comprehensive security update detection with legacy tools.

Windows Server Update Services

Windows Server Update Services (WSUS) enables information technology administrators to deploy the latest Microsoft product updates to computers that are running the Windows operating system. For more information about how to deploy security updates using Windows Server Update Services, see the TechNet article, Windows Server Update Services.

Systems Management Server

The following table provides the SMS detection and deployment summary for this security update.

SoftwareSMS 2.0SMS 2003 with SUITSMS 2003 with ITMUConfiguration Manager 2007
Windows XP Service Pack 3YesYesYesYes
Windows XP Professional x64 Edition Service Pack 2NoNoYesYes
Windows Server 2003 Service Pack 2YesYesYesYes
Windows Server 2003 x64 Edition Service Pack 2NoNoYesYes
Windows Server 2003 with SP2 for Itanium-based SystemsNoNoYesYes
Windows Vista Service Pack 1 and Windows Vista Service Pack 2NoNoYesYes
Windows Vista x64 Edition Service Pack 1 and Windows Vista x64 Edition Service Pack 2NoNoYesYes
Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit Systems Service Pack 2NoNoYesYes
Windows Server 2008 for x64-based Systems and Windows Server 2008 for x64-based Systems Service Pack 2NoNoYesYes
Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for Itanium-based Systems Service Pack 2NoNoYesYes
Windows 7 for 32-bit Systems and Windows 7 for 32-bit Systems Service Pack 1NoNoYesYes
Windows 7 for x64-based Systems and Windows 7 for x64-based Systems Service Pack 1NoNoYesYes
Windows Server 2008 R2 for x64-based Systems and Windows Server 2008 R2 for x64-based Systems Service Pack 1NoNoYesYes
Windows Server 2008 R2 for Itanium-based Systems and Windows Server 2008 R2 for Itanium-based Systems Service Pack 1NoNoYesYes

For SMS 2.0 and SMS 2003, the Security Update Inventory Tool (SUIT) can be used by SMS to detect security updates. See also Downloads for Systems Management Server 2.0.

For SMS 2003, the SMS 2003 Inventory Tool for Microsoft Updates (ITMU) can be used by SMS to detect security updates that are offered by Microsoft Update and that are supported by Windows Server Update Services. For more information about the SMS 2003 ITMU, see SMS 2003 Inventory Tool for Microsoft Updates. For more information about SMS scanning tools, see SMS 2003 Software Update Scanning Tools. See also Downloads for Systems Management Server 2003.

System Center Configuration Manager 2007 uses WSUS 3.0 for detection of updates. For more information about Configuration Manager 2007 Software Update Management, visit System Center Configuration Manager 2007.

For more information about SMS, visit the SMS Web site.

For more detailed information, see Microsoft Knowledge Base Article 910723: Summary list of monthly detection and deployment guidance articles.

Update Compatibility Evaluator and Application Compatibility Toolkit

Updates often write to the same files and registry settings required for your applications to run. This can trigger incompatibilities and increase the time it takes to deploy security updates. You can streamline testing and validating Windows updates against installed applications with the Update Compatibility Evaluator components included with Application Compatibility Toolkit.

The Application Compatibility Toolkit (ACT) contains the necessary tools and documentation to evaluate and mitigate application compatibility issues before deploying Microsoft Windows Vista, a Windows Update, a Microsoft Security Update, or a new version of Windows Internet Explorer in your environment.

Affected Software

For information about the specific security update for your affected software, click the appropriate link:

Windows XP (all editions)

Reference Table

The following table contains the security update information for this software. You can find additional information in the subsection, Deployment Information, in this section.

Inclusion in Future Service Packs The update for this issue will be included in a future service pack or update rollup
Deployment
Installing without user interventionFor Windows XP Service Pack 3:
WindowsXP-KB2508272-x86-enu.exe /quiet
For Windows XP Professional x64 Edition Service Pack 2:
WindowsServer2003.WindowsXP-KB2508272-x64-enu.exe /quiet
Installing without restartingFor Windows XP Service Pack 3:
WindowsXP-KB2508272-x86-enu.exe /norestart
For Windows XP Professional x64 Edition Service Pack 2:
WindowsServer2003.WindowsXP-KB2508272-x64-enu.exe /norestart
Update log fileKB2508272.log
Further informationSee the subsection, Detection and Deployment Tools and Guidance
Restart Requirement
Restart required?In some cases, this update does not require a restart. If a restart is required, a message appears that advises you to restart.
HotPatchingNot applicable
Removal Information Use Add or Remove Programs tool in Control Panel or the Spuninst.exe utility located in the %Windir%\$NTUninstallKB2508272$\Spuninst folder
Registry Key Verification For all supported 32-bit editions of Windows XP:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Windows XP\SP4\KB2508272\Filelist
For all supported x64-based editions of Windows XP:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Windows XP Version 2003\SP3\KB2508272\Filelist

Note For supported versions of Windows XP Professional x64 Edition, this security update is the same as supported versions of the Windows Server 2003 x64 Edition security update.

Deployment Information

Installing the Update

When you install this security update, the installer checks whether one or more of the files that are being updated on your system have previously been updated by a Microsoft hotfix.

If you have previously installed a hotfix to update one of these files, the installer copies the RTMQFE, SP1QFE, or SP2QFE files to your system. Otherwise, the installer copies the RTMGDR, SP1GDR, or SP2GDR files to your system. Security updates may not contain all variations of these files. For more information about this behavior, see Microsoft Knowledge Base Article 824994.

For more information about the installer, see Microsoft Knowledge Base Article 832475.

For more information about the terminology that appears in this bulletin, such as hotfix, see Microsoft Knowledge Base Article 824684.

This security update supports the following setup switches.

Supported Security Update Installation Switches
SwitchDescription
/help Displays the command-line options.
Setup Modes
/passive Unattended Setup mode. No user interaction is required, but installation status is displayed. If a restart is required at the end of Setup, a dialog box will be presented to the user with a timer warning that the computer will restart in 30 seconds.
/quiet Quiet mode. This is the same as unattended mode, but no status or error messages are displayed.
Restart Options
/norestart Does not restart when installation has completed.
/forcerestart Restarts the computer after installation and force other applications to close at shutdown without saving open files first.
/warnrestart[:x] Presents a dialog box with a timer warning the user that the computer will restart in x seconds. (The default setting is 30 seconds.) Intended for use with the /quiet switch or the /passive switch.
/promptrestart Displays a dialog box prompting the local user to allow a restart.
Special Options
/overwriteoem Overwrites OEM files without prompting.
/nobackup Does not back up files needed for uninstall.
/forceappsclose Forces other programs to close when the computer shuts down.
/log:path Allows the redirection of installation log files.
/integrate:path Integrates the update into the Windows source files. These files are located at the path that is specified in the switch.
/extract[:path] Extracts files without starting the Setup program.
/ER Enables extended error reporting.
/verbose Enables verbose logging. During installation, creates %Windir%\CabBuild.log. This log details the files that are copied. Using this switch may cause the installation to proceed more slowly.

Note You can combine these switches into one command. For backward compatibility, the security update also supports the setup switches that the earlier version of the Setup program uses. For more information about the supported installation switches, see Microsoft Knowledge Base Article 262841.

Removing the Update

This security update supports the following setup switches.

Supported Spuninst.exe Switches
SwitchDescription
/help Displays the command-line options.
Setup Modes
/passive Unattended Setup mode. No user interaction is required, but installation status is displayed. If a restart is required at the end of Setup, a dialog box will be presented to the user with a timer warning that the computer will restart in 30 seconds.
/quiet Quiet mode. This is the same as unattended mode, but no status or error messages are displayed.
Restart Options
/norestart Does not restart when installation has completed
/forcerestart Restarts the computer after installation and force other applications to close at shutdown without saving open files first.
/warnrestart[:x] Presents a dialog box with a timer warning the user that the computer will restart in x seconds. (The default setting is 30 seconds.) Intended for use with the /quiet switch or the /passive switch.
/promptrestart Displays a dialog box prompting the local user to allow a restart.
Special Options
/forceappsclose Forces other programs to close when the computer shuts down.
/log:path Allows the redirection of installation log files.

Verifying That the Update Has Been Applied

  • Microsoft Baseline Security Analyzer

    To verify that a security update has been applied to an affected system, you may be able to use the Microsoft Baseline Security Analyzer (MBSA) tool. See the section, Detection and Deployment Tools and Guidance, earlier in this bulletin for more information.

  • Registry Key Verification

    You may also be able to verify the files that this security update has installed by reviewing the registry keys listed in the Reference Table in this section.

    These registry keys may not contain a complete list of installed files. Also, these registry keys may not be created correctly when an administrator or an OEM integrates or slipstreams this security update into the Windows installation source files.

Windows Server 2003 (all editions)

Reference Table

The following table contains the security update information for this software. You can find additional information in the subsection, Deployment Information, in this section.

Inclusion in Future Service Packs The update for this issue will be included in a future service pack or update rollup
Deployment
Installing without user interventionFor all supported 32-bit editions of Windows Server 2003:
WindowsServer2003-KB2508272-x86-enu.exe /quiet
For all supported x64-based editions of Windows Server 2003:
WindowsServer2003.WindowsXP-KB2508272-x64-enu.exe /quiet
For all supported Itanium-based editions of Windows Server 2003:
WindowsServer2003-KB2508272-ia64-enu.exe /quiet
Installing without restartingFor all supported 32-bit editions of Windows Server 2003:
WindowsServer2003-KB2508272-x86-enu.exe /norestart
For all supported x64-based editions of Windows Server 2003:
WindowsServer2003.WindowsXP-KB2508272-x64-enu.exe /norestart
For all supported Itanium-based editions of Windows Server 2003:
WindowsServer2003-KB2508272-ia64-enu.exe /norestart
Update log fileKB2508272.log
Further informationSee the subsection, Detection and Deployment Tools and Guidance
Restart Requirement
Restart required?In some cases, this update does not require a restart. If a restart is required, a message appears that advises you to restart.
HotPatchingThis security update does not support HotPatching. For more information about HotPatching, see Microsoft Knowledge Base Article 897341.
Removal Information Use Add or Remove Programs tool in Control Panel or the Spuninst.exe utility located in the %Windir%\$NTUninstallKB2508272$\Spuninst folder
Registry Key Verification HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Windows Server 2003\SP3\KB2508272\Filelist

Deployment Information

Installing the Update

When you install this security update, the installer checks whether one or more of the files that are being updated on your system have previously been updated by a Microsoft hotfix.

If you have previously installed a hotfix to update one of these files, the installer copies the RTMQFE, SP1QFE, or SP2QFE files to your system. Otherwise, the installer copies the RTMGDR, SP1GDR, or SP2GDR files to your system. Security updates may not contain all variations of these files. For more information about this behavior, see Microsoft Knowledge Base Article 824994.

For more information about the installer, see Microsoft Knowledge Base Article 832475.

For more information about the terminology that appears in this bulletin, such as hotfix, see Microsoft Knowledge Base Article 824684.

This security update supports the following setup switches.

Supported Security Update Installation Switches
SwitchDescription
/help Displays the command-line options.
Setup Modes
/passive Unattended Setup mode. No user interaction is required, but installation status is displayed. If a restart is required at the end of Setup, a dialog box will be presented to the user with a timer warning that the computer will restart in 30 seconds.
/quiet Quiet mode. This is the same as unattended mode, but no status or error messages are displayed.
Restart Options
/norestart Does not restart when installation has completed.
/forcerestart Restarts the computer after installation and force other applications to close at shutdown without saving open files first.
/warnrestart[:x] Presents a dialog box with a timer warning the user that the computer will restart in x seconds. (The default setting is 30 seconds.) Intended for use with the /quiet switch or the /passive switch.
/promptrestart Displays a dialog box prompting the local user to allow a restart.
Special Options
/overwriteoem Overwrites OEM files without prompting.
/nobackup Does not back up files needed for uninstall.
/forceappsclose Forces other programs to close when the computer shuts down.
/log:path Allows the redirection of installation log files.
/integrate:path Integrates the update into the Windows source files. These files are located at the path that is specified in the switch.
/extract[:path] Extracts files without starting the Setup program.
/ER Enables extended error reporting.
/verbose Enables verbose logging. During installation, creates %Windir%\CabBuild.log. This log details the files that are copied. Using this switch may cause the installation to proceed more slowly.

Note You can combine these switches into one command. For backward compatibility, the security update also supports many of the setup switches that the earlier version of the Setup program uses. For more information about the supported installation switches, see Microsoft Knowledge Base Article 262841.

Removing the Update

This security update supports the following setup switches.

Supported Spuninst.exe Switches
SwitchDescription
/help Displays the command-line options.
Setup Modes
/passive Unattended Setup mode. No user interaction is required, but installation status is displayed. If a restart is required at the end of Setup, a dialog box will be presented to the user with a timer warning that the computer will restart in 30 seconds.
/quiet Quiet mode. This is the same as unattended mode, but no status or error messages are displayed.
Restart Options
/norestart Does not restart when installation has completed.
/forcerestart Restarts the computer after installation and force other applications to close at shutdown without saving open files first.
/warnrestart[:x] Presents a dialog box with a timer warning the user that the computer will restart in x seconds. (The default setting is 30 seconds.) Intended for use with the /quiet switch or the /passive switch.
/promptrestart Displays a dialog box prompting the local user to allow a restart.
Special Options
/forceappsclose Forces other programs to close when the computer shuts down.
/log:path Allows the redirection of installation log files.

Verifying that the Update Has Been Applied

  • Microsoft Baseline Security Analyzer

    To verify that a security update has been applied to an affected system, you may be able to use the Microsoft Baseline Security Analyzer (MBSA) tool. See the section, Detection and Deployment Tools and Guidance, earlier in this bulletin for more information.

  • Registry Key Verification

    You may also be able to verify the files that this security update has installed by reviewing the registry keys listed in the Reference Table in this section.

    These registry keys may not contain a complete list of installed files. Also, these registry keys may not be created correctly when an administrator or an OEM integrates or slipstreams this security update into the Windows installation source files.

Windows Vista (all editions)

Reference Table

The following table contains the security update information for this software. You can find additional information in the subsection, Deployment Information, in this section.

Inclusion in Future Service Packs The update for this issue will be included in a future service pack or update rollup
Deployment
Installing without user interventionFor all supported 32-bit editions of Windows Vista:
Windows6.0-KB2508272-x86.msu /quiet
For all supported x64-based editions of Windows Vista:
Windows6.0-KB2508272-x64.msu /quiet
Installing without restartingFor all supported 32-bit editions of Windows Vista:
Windows6.0-KB2508272-x86.msu /quiet /norestart
For all supported x64-based editions of Windows Vista:
Windows6.0-KB2508272-x64.msu /quiet /norestart
Further informationSee the subsection, Detection and Deployment Tools and Guidance
Restart Requirement
Restart required?In some cases, this update does not require a restart. If a restart is required, a message appears that advises you to restart.
HotPatchingNot applicable.
Removal Information WUSA.exe does not support uninstall of updates. To uninstall an update installed by WUSA, click Control Panel, and then click Security. Under Windows Update, click View installed updates and select from the list of updates.
Registry Key Verification Note A registry key does not exist to validate the presence of this update.

Deployment Information

Installing the Update

When you install this security update, the installer checks whether one or more of the files that are being updated on your system have previously been updated by a Microsoft hotfix.

For more information about the terminology that appears in this bulletin, such as hotfix, see Microsoft Knowledge Base Article 824684.

This security update supports the following setup switches.

Supported Security Update Installation Switches
SwitchDescription
/?, /h, /help Displays help on supported switches.
/quiet Suppresses the display of status or error messages.
/norestart When combined with /quiet, the system will not be restarted after installation even if a restart is required to complete installation.

Note For more information about the wusa.exe installer, see Microsoft Knowledge Base Article 934307.

Verifying That the Update Has Been Applied

  • Microsoft Baseline Security Analyzer

    To verify that a security update has been applied to an affected system, you may be able to use the Microsoft Baseline Security Analyzer (MBSA) tool. See the section, Detection and Deployment Tools and Guidance, earlier in this bulletin for more information.

Windows Server 2008 (all editions)

Reference Table

The following table contains the security update information for this software. You can find additional information in the subsection, Deployment Information, in this section.

Inclusion in Future Service Packs The update for this issue will be included in a future service pack or update rollup
Deployment
Installing without user interventionFor all supported 32-bit editions of Windows Server 2008:
Windows6.0-KB2508272-x86.msu /quiet
For all supported x64-based editions of Windows Server 2008:
Windows6.0-KB2508272-x64.msu /quiet
For all supported Itanium-based editions of Windows Server 2008:
Windows6.0-KB2508272-ia64.msu /quiet
Installing without restartingFor all supported 32-bit editions of Windows Server 2008:
Windows6.0-KB2508272-x86.msu /quiet /norestart
For all supported x64-based editions of Windows Server 2008:
Windows6.0-KB2508272-x64.msu /quiet /norestart
For all supported Itanium-based editions of Windows Server 2008:
Windows6.0-KB2508272-ia64.msu /quiet /norestart
Further informationSee the subsection, Detection and Deployment Tools and Guidance
Restart Requirement In some cases, this update does not require a restart. If a restart is required, a message appears that advises you to restart.
Restart required?
HotPatchingNot applicable.
Removal Information WUSA.exe does not support uninstall of updates. To uninstall an update installed by WUSA, click Control Panel, and then click Security. Under Windows Update, click View installed updates and select from the list of updates.
Registry Key Verification Note A registry key does not exist to validate the presence of this update.

Deployment Information

Installing the Update

When you install this security update, the installer checks whether one or more of the files that are being updated on your system have previously been updated by a Microsoft hotfix.

For more information about the terminology that appears in this bulletin, such as hotfix, see Microsoft Knowledge Base Article 824684.

This security update supports the following setup switches.

Supported Security Update Installation Switches
SwitchDescription
/?, /h, /help Displays help on supported switches.
/quiet Suppresses the display of status or error messages.
/norestart When combined with /quiet, the system will not be restarted after installation even if a restart is required to complete installation.

Note For more information about the wusa.exe installer, see Microsoft Knowledge Base Article 934307.

Verifying That the Update Has Been Applied

  • Microsoft Baseline Security Analyzer

    To verify that a security update has been applied to an affected system, you may be able to use the Microsoft Baseline Security Analyzer (MBSA) tool. See the section, Detection and Deployment Tools and Guidance, earlier in this bulletin for more information.

Windows 7 (all editions)

Reference Table

The following table contains the security update information for this software. You can find additional information in the subsection, Deployment Information, in this section.

Inclusion in Future Service Packs The update for this issue will be included in a future service pack or update rollup
Deployment
Installing without user interventionFor all supported 32-bit editions of Windows 7:
Windows6.1-KB2508272-x86.msu /quiet
For all supported x64-based editions of Windows 7:
Windows6.1-KB2508272-x64.msu /quiet
Installing without restartingFor all supported 32-bit editions of Windows 7:
Windows6.1-KB2508272-x86.msu /quiet /norestart
For all supported x64-based editions of Windows 7:
Windows6.1-KB2508272-x64.msu /quiet /norestart
Further informationSee the subsection, Detection and Deployment Tools and Guidance
Restart Requirement
Restart required?In some cases, this update does not require a restart. If a restart is required, a message appears that advises you to restart.
HotPatchingNot applicable.
Removal Information To uninstall an update installed by WUSA, use the /Uninstall setup switch or click Control Panel, click System and Security, and then under Windows Update, click View installed updates and select from the list of updates.
Registry Key Verification Note A registry key does not exist to validate the presence of this update.

Deployment Information

Installing the Update

When you install this security update, the installer checks whether one or more of the files that are being updated on your system have previously been updated by a Microsoft hotfix.

For more information about the terminology that appears in this bulletin, such as hotfix, see Microsoft Knowledge Base Article 824684.

This security update supports the following setup switches.

Supported Security Update Installation Switches
SwitchDescription
/?, /h, /help Displays help on supported switches.
/quiet Suppresses the display of status or error messages.
/norestart When combined with /quiet, the system will not be restarted after installation even if a restart is required to complete installation.
/warnrestart:<seconds> When combined with /quiet, the installer will warn the user before initiating restart.
/promptrestart When combined with /quiet, the installer will prompt before initiating restart.
/forcerestart When combined with /quiet, the installer will forcefully close applications and initiate restart.
/log:<file name> Enables logging to specified file.
/extract:<destination> Extracts the package contents to the destination folder.
/uninstall /kb:<KB Number> Uninstalls the security update.

Note For more information about the wusa.exe installer, see "Windows Update Stand-alone Installer" in the TechNet article, Miscellaneous Changes in Windows 7.

Verifying That the Update Has Been Applied

  • Microsoft Baseline Security Analyzer

    To verify that a security update has been applied to an affected system, you may be able to use the Microsoft Baseline Security Analyzer (MBSA) tool. See the section, Detection and Deployment Tools and Guidance, earlier in this bulletin for more information.

Windows Server 2008 R2 (all editions)

Reference Table

The following table contains the security update information for this software. You can find additional information in the subsection, Deployment Information, in this section.

Inclusion in Future Service Packs The update for this issue will be included in a future service pack or update rollup
Deployment
Installing without user interventionFor all supported x64-based editions of Windows Server 2008 R2:
Windows6.1-KB2508272-x64.msu /quiet
For all supported Itanium-based editions of Windows Server 2008 R2:
Windows6.1-KB2508272-ia64.msu /quiet
Installing without restartingFor all supported x64-based editions of Windows Server 2008 R2:
Windows6.1-KB2508272-x64.msu /quiet /norestart
For all supported Itanium-based editions of Windows Server 2008 R2:
Windows6.1-KB2508272-ia64.msu /quiet /norestart
Further informationSee the subsection, Detection and Deployment Tools and Guidance
Restart Requirement
Restart required?In some cases, this update does not require a restart. If a restart is required, a message appears that advises you to restart.
HotPatchingNot applicable.
Removal Information To uninstall an update installed by WUSA, use the /Uninstall setup switch or click Control Panel, click System and Security, and then under Windows Update, click View installed updates and select from the list of updates.
Registry Key Verification Note A registry key does not exist to validate the presence of this update.

Deployment Information

Installing the Update

When you install this security update, the installer checks whether one or more of the files that are being updated on your system have previously been updated by a Microsoft hotfix.

For more information about the terminology that appears in this bulletin, such as hotfix, see Microsoft Knowledge Base Article 824684.

This security update supports the following setup switches.

Supported Security Update Installation Switches
SwitchDescription
/?, /h, /help Displays help on supported switches.
/quiet Suppresses the display of status or error messages.
/norestart When combined with /quiet, the system will not be restarted after installation even if a restart is required to complete installation.
/warnrestart:<seconds> When combined with /quiet, the installer will warn the user before initiating restart.
/promptrestart When combined with /quiet, the installer will prompt before initiating restart.
/forcerestart When combined with /quiet, the installer will forcefully close applications and initiate restart.
/log:<file name> Enables logging to specified file.
/extract:<destination> Extracts the package contents to the destination folder.
/uninstall /kb:<KB Number> Uninstalls the security update.

Note For more information about the wusa.exe installer, see "Windows Update Stand-alone Installer" in the TechNet article, Miscellaneous Changes in Windows 7.

Verifying That the Update Has Been Applied

  • Microsoft Baseline Security Analyzer

    To verify that a security update has been applied to an affected system, you may be able to use the Microsoft Baseline Security Analyzer (MBSA) tool. See the section, Detection and Deployment Tools and Guidance, earlier in this bulletin for more information.

Other Information

Acknowledgments

Microsoft thanks the following for working with us to help protect customers:

  • Chris Ries of Carnegie Mellon University Information Security Office for reporting the Microsoft Internet Explorer 8 Developer Tools Vulnerability (CVE-2010-0811)
  • Brian Gorenc of TippingPoint's DVLabs for working with us on the Microsoft WMITools ActiveX Control Vulnerability (CVE-2010-3973)
  • RadLSneak, working with iSIGHT Partners Global Vulnerability Partnership, for reporting the Microsoft Windows Messenger ActiveX Control Vulnerability (CVE-2011-1243)

Microsoft Active Protections Program (MAPP)

To improve security protections for customers, Microsoft provides vulnerability information to major security software providers in advance of each monthly security update release. Security software providers can then use this vulnerability information to provide updated protections to customers via their security software or devices, such as antivirus, network-based intrusion detection systems, or host-based intrusion prevention systems. To determine whether active protections are available from security software providers, please visit the active protections Web sites provided by program partners, listed in Microsoft Active Protections Program (MAPP) Partners.

Support

  • Customers in the U.S. and Canada can receive technical support from Security Support or 1-866-PCSAFETY. There is no charge for support calls that are associated with security updates. For more information about available support options, see Microsoft Help and Support.
  • International customers can receive support from their local Microsoft subsidiaries. There is no charge for support that is associated with security updates. For more information about how to contact Microsoft for support issues, visit the International Support Web site.

Disclaimer

The information provided in the Microsoft Knowledge Base is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

Revisions

  • V1.0 (April 12, 2011): Bulletin published.
  • V1.1 (July 27, 2011): Added class identifiers for the Microsoft WMITools ActiveX Control described in this bulletin's vulnerability section for CVE-2010-3973. This is an informational change only. Customers who have already applied the "Prevent COM objects from running in Internet Explorer" workaround for this vulnerability should reapply this workaround with the additional class identifiers.

Built at 2014-04-18T13:49:36Z-07:00

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