ALERT Microsoft Internet Explorer: Execute Arbitrary Code/Commands -- Remote with User Interaction

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2013.0076
             Out-of-band security update for Internet Explorer
                              15 January 2013

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Microsoft Internet Explorer
Publisher:         Microsoft
Operating System:  Windows XP
                   Windows Server 2003
                   Windows Vista
                   Windows Server 2008
                   Windows 7
                   Windows Server 2008 R2
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2012-4792  

Reference:         ESB-2013.0001

Original Bulletin: 
   https://technet.microsoft.com/en-us/security/bulletin/ms13-008

Comment: In the wild targeted attacks are exploiting this vulnerability. 
         
         While Microsoft have previously provided a workaround for this bug, 
         the patch now provided mitigates the vulnerability.

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Microsoft Security Bulletin MS13-008 - Critical

Security Update for Internet Explorer (2799329)

Published: Monday, January 14, 2013

Version: 1.0

General Information

Executive Summary

This security update resolves one publicly disclosed vulnerability in Internet 
Explorer. The vulnerability could allow remote code execution if a user views a 
specially crafted webpage using Internet Explorer. An attacker who successfully 
exploited this vulnerability could gain the same user rights as the current 
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.

This security update is rated Critical for Internet Explorer 6, Internet 
Explorer 7, and Internet Explorer 8 on Windows clients and Moderate for 
Internet Explorer 6, Internet Explorer 7, and Internet Explorer 8 on Windows 
servers. Internet Explorer 9 and Internet Explorer 10 are not affected.

Affected Software 

Internet Explorer 6
Internet Explorer 7 
Internet Explorer 8 

Vulnerability Information

Internet Explorer Use After Free Vulnerability - CVE-2012-4792

A remote code execution vulnerability exists in the way that Internet Explorer
accesses an object in memory that has not been correctly initialized or has 
been deleted. The vulnerability may corrupt memory in such a way that an 
attacker could execute arbitrary code in the context of the current user.

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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
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