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Category:   Application (Web Browser)  >   Microsoft Internet Explorer (IE) Vendors:   Microsoft
Microsoft Internet Explorer Multiple Use-After-Free Bugs Let Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1027749
SecurityTracker URL:  http://securitytracker.com/id/1027749
CVE Reference:   CVE-2012-1538, CVE-2012-1539, CVE-2012-4775   (Links to External Site)
Date:  Nov 13 2012
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 9
Description:   Several vulnerabilities were reported in Microsoft Internet Explorer. A remote user can cause arbitrary code to be executed on the target user's system.

A remote user can create specially crafted HTML that, when loaded by the target user, will trigger a use-after-free memory error and execute arbitrary code on the target system. The code will run with the privileges of the target user.

The CFormElement class is affected [CVE-2012-1538].

The CTreePos class is affected [CVE-2012-1539].

The CTreeNode class is affected [CVE-2012-4775].

Jose A. Vazquez of spa-s3c.blogspot.com (via VeriSign iDefense Labs) and Cheng-da Tsai (Orange), Sung-ting Tsai, and Ming-chieh Pan (Nanika) of Trend Micro reported these vulnerabilities.

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:   The vendor has issued a fix.

A patch matrix is available in the vendor's advisory.

A restart is required.

The Microsoft advisory is available at:

http://technet.microsoft.com/en-us/security/bulletin/ms12-071

Vendor URL:  technet.microsoft.com/en-us/security/bulletin/ms12-071 (Links to External Site)
Cause:   Access control error
Underlying OS:   Windows (2008), Windows (7), Windows (Vista)

Message History:   None.


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