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Category:   Application (Web Browser)  >   Microsoft Internet Explorer Vendors:   Microsoft
Microsoft Internet Explorer Recursive CSS Import Memory Corruption Error Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1024922
SecurityTracker URL:
CVE Reference:   CVE-2010-3971   (Links to External Site)
Updated:  Jan 12 2011
Original Entry Date:  Dec 23 2010
Impact:   Execution of arbitrary code via network, User access via network
Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 6, 7, 8
Description:   A vulnerability was reported in Microsoft Internet Explorer. A remote user can cause arbitrary code to be executed on the target user's system.

When parsing an HTML page that contains a recursive CSS import, an object is deleted and later reused.

A remote user can create specially crafted HTML that, when loaded by the target user, will exploit this flaw to trigger a memory corruption error and execute arbitrary code on the target system. The code will run with the privileges of the target user.

This vulnerability is being actively exploited.

The original advisory is available at:

WooYun reported this vulnerability.

Impact:   A remote user can create HTML that, when loaded by the target user, will execute arbitrary code on the target user's system.
Solution:   No solution was available at the time of this entry.

The vendor has described a workaround in their advisory.

The vendor's advisory is available at:

Vendor URL: (Links to External Site)
Cause:   Access control error
Underlying OS:  Windows (Any)

Message History:   None.

 Source Message Contents

[Original Message Not Available for Viewing]

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