Microsoft Security Advisory (2736233)

Does this advisory apply to Server Core installations? 
This advisory does not apply to supported editions of Windows Server 2008 or Windows Server 2008 R2, 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.

Does this update replace the Cumulative Security Update of ActiveX Kill Bits (2618451)? 
No, for the purpose of automatic updating, this update does not replace the Cumulative Security Update of ActiveX Kill Bits (2618451) that is described in Microsoft Security Bulletin MS11-090. Automatic updating will still offer the MS11-090 update to customers regardless of whether or not they installed this update (2736233). However, customers who install this update (2695962) do not need to install the MS11-090 update to be protected with all the kill bits set in MS11-090.

What kill bits does this Update Rollup of ActiveX Kill Bits contain? 
This Update Rollup 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;MS11-027, Cumulative Security Update of ActiveX Kill Bits; MS11-090, Cumulative Security Update of ActiveX Kill Bits; and advisories titled Update Rollup for ActiveX Kill Bits, Microsoft Security Advisory 953839, Microsoft Security Advisory 956391, Microsoft Security Advisory 960715, Microsoft Security Advisory 969898, Microsoft Security Advisory 2562937, Microsoft Security Advisory 2647518, and Microsoft Security Advisory 2695962.

Why is Microsoft releasing this Update Rollup for ActiveX Kill Bits with a security advisory when previous kill bit updates were released with a security bulletin? 
Microsoft is releasing this Update Rollup for ActiveX Kill Bits with an advisory because the new kill bits do not affect Microsoft software.

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.

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 controls from running in Internet Explorer.

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

Why does this advisory not have a security rating associated with it? 
This update contains new kill bits for third-party controls. Microsoft does not provide a security rating for vulnerable third-party controls.

Review the Microsoft Knowledge Base Article that is associated with this advisory

Microsoft encourages customers to install this update. Customers who are interested in learning more about this update should review Microsoft Knowledge Base Article 2736233.

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

• Cisco Secure Desktop. The following Class Identifiers relate to a request by Cisco to set a kill bit for an ActiveX control that is vulnerable. For more information regarding security issues in the Cisco Secure Desktop ActiveX control, please see the Cisco Security Advisory, Multiple Vulnerabilities in Cisco AnyConnect Secure Mobility Client. The class identifiers (CLSIDs) for this ActiveX control are:
  • {705ec6d4-b138-4079-a307-ef13e4889a82}
  • {f8fc1530-0608-11df-2008-0800200c9a66}
  • {e34f52fe-7769-46ce-8f8b-5e8abad2e9fc}
• Cisco Hostscan. The following Class Identifiers relate to a request by Cisco to set a kill bit for an ActiveX control that is vulnerable. For more information regarding security issues in the Cisco Hostscan ActiveX control, please see the Cisco Security Advisory, Multiple Vulnerabilities in Cisco AnyConnect Secure Mobility Client. The class identifiers (CLSIDs) for this ActiveX control are:
  • {f8fc1530-0608-11df-2008-0800200c9a66}
  • {e34f52fe-7769-46ce-8f8b-5e8abad2e9fc}
• Cisco AnyConnect Secure Mobility Client. The following Class Identifiers relate to a request by Cisco to set a kill bit for an ActiveX control that is vulnerable. For more information regarding security issues in the Cisco AnyConnect Secure Mobility Client ActiveX control, please see the Cisco Security Advisory, Multiple Vulnerabilities in Cisco AnyConnect Secure Mobility Client. The class identifiers (CLSIDs) for this ActiveX control are:
  • {55963676-2f5e-4baf-ac28-cf26aa587566}
  • {cc679cb8-dc4b-458b-b817-d447b3b6ac31}