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             AUSCERT External Security Bulletin Redistribution

         Microsoft Office execution of code/commands vulnerability
                             14 December 2011


        AusCERT Security Bulletin Summary

Product:           Microsoft Office
Publisher:         Microsoft
Operating System:  Windows
                   Mac OS X
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2011-1983  

Original Bulletin: 

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Microsoft Security Bulletin MS11-089 - Important
Vulnerability in Microsoft Office Could Allow Remote Code Execution (2590602)

Published Date: December 13, 2011 

Version: 1.0

General Information

Executive Summary:

This security update resolves a privately reported vulnerability in Microsoft 
Office. The vulnerability could allow remote code execution if a user opens a 
specially crafted Word file. An attacker who successfully exploited this 
vulnerability could gain the same user rights as the logged-on 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 Important for all supported editions of Microsoft 
Office 2007, Microsoft Office 2010, and Microsoft Office for Mac 2011. 

The security update addresses the vulnerability by correcting the way that 
Microsoft Word parses specially crafted Word files. 

Affected Software:

Microsoft Office 2007 Service Pack 2 and Microsoft Office 2007 Service Pack 3
Microsoft Office 2010 and Microsoft Office 2010 Service Pack 1 (32-bit editions)
Microsoft Office 2010 and Microsoft Office 2010 Service Pack 1 (64-bit editions)
Microsoft Office for Mac
Microsoft Office for Mac 2011

Vulnerability Information:

Word Use After Free Vulnerability - CVE-2011-1983

A remote code execution vulnerability exists in the way that Microsoft Word 
handles specially crafted Word files. An attacker who successfully exploited 
this vulnerability could take complete control of an affected system. An 
attacker could then install programs; view, change, or delete data; or 
create new accounts with full user rights.

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