Microsoft Security Advisory 2488013

Vulnerability in Internet Explorer Could Allow Remote Code Execution

Published: December 22, 2010 | Updated: February 08, 2011

Version: 2.0

General Information

Executive Summary

Microsoft has completed the investigation into public reports of this vulnerability. We have issued MS11-003 to address this issue. For more information about this issue, including download links for an available security update, please review MS11-003. The vulnerability addressed is the CSS Memory Corruption Vulnerability - CVE-2010-3971.

Other Information

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.



  • Customers in the United States and Canada can receive technical support from Security Support. For more information about available support options, see Microsoft Help and Support.
  • International customers can receive support from their local Microsoft subsidiaries. For more information about how to contact Microsoft for international support issues, visit International Support.
  • Microsoft TechNet Security provides additional information about security in Microsoft products.


The information provided in this advisory 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.


  • V1.0 (December 22, 2010): Advisory published.
  • V1.1 (December 31, 2010): Revised Executive Summary to reflect investigation of targeted attacks.
  • V1.2 (January 11, 2011): Added the workaround, Prevent the recursive loading of CSS style sheets in Internet Explorer, and revised Executive Summary to reflect investigation of limited attacks.
  • V1.3 (January 11, 2011): Revised the workaround, Prevent the recursive loading of CSS style sheets in Internet Explorer, to add the impact for the workaround.
  • V2.0 (February 8, 2011): Advisory updated to reflect publication of security bulletin.

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