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A  U  S  C  E  R  T                                           A  L  E  R  T

                       AL-2009.0032 -- AUSCERT ALERT
                              [Win][Mac][OSX]
              Microsoft Office Excel: Execute Arbitrary Code
                               15 April 2009

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        AusCERT Alert Summary
        ---------------------

Product:              Microsoft Office Excel 2000 Service Pack 3
                      Microsoft Office Excel 2002 Service Pack 3
                      Microsoft Office Excel 2003 Service Pack 3
                      Microsoft Office Excel 2007 Service Pack 1
                      Microsoft Office 2004 for Mac
                      Microsoft Office 2008 for Mac
                      Microsoft Office Excel Viewer 2003 Service Pack 3
                      Microsoft Office Excel Viewer
                      Microsoft Office Compatibility Pack for Word, Excel, 
                        and PowerPoint 2007 File Formats Service Pack 1
Publisher:            Microsoft
Operating System:     Windows
                      Mac OS X
Impact:               Execute Arbitrary Code/Commands
Access:               Remote/Unauthenticated
CVE Names:            CVE-2009-0238 CVE-2009-0100

Original Bulletin:    
  http://www.microsoft.com/technet/security/bulletin/MS09-009.mspx

Comment: One of these vulnerabilities is being actively exploited.

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Vulnerabilities in Microsoft Office Excel Could Cause Remote Code Execution 
(968557)
  
   Published: April 14, 2009

   Version: 1.0

General Information

Executive Summary

   This security update resolves a privately reported and a publicly 
   disclosed vulnerability. The vulnerabilities could allow remote code 
   execution if the user opens a specially crafted Excel file. An attacker 
   who successfully exploited these vulnerabilities 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. 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 all supported editions of 
   Microsoft Office Excel 2000. For all supported editions of Microsoft 
   Office Excel 2002, Microsoft Office Excel 2003, Microsoft Office Excel 
   2007, Microsoft Office 2004 for Mac, and Microsoft Office 2008 for Mac; 
   all supported versions of Microsoft Office Excel Viewer; and Microsoft 
   Office Compatibility Pack Service Pack 1, this security update is rated 
   Important. For more information, see the subsection, Affected and 
   Non-Affected Software, in this section.

   This security update addresses these vulnerabilities by modifying the way 
   that Microsoft Office Excel opens Excel files. For more information about 
   the vulnerability, see the Frequently Asked Questions (FAQ) subsection for 
   the specific vulnerability entry under the next section, Vulnerability 
   Information.

   Recommendation. Microsoft recommends that customers apply the update 
   immediately.

Affected Software

   Microsoft Office Excel 2000 Service Pack 3
   Microsoft Office Excel 2002 Service Pack 3
   Microsoft Office Excel 2003 Service Pack 3
   Microsoft Office Excel 2007 Service Pack 1
   Microsoft Office 2004 for Mac
   Microsoft Office 2008 for Mac
   Microsoft Office Excel Viewer 2003 Service Pack 3
   Microsoft Office Excel Viewer
   Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 
     File Formats Service Pack 1

Vulnerability Information

Memory Corruption Vulnerability - CVE-2009-0100

A remote code execution vulnerability exists in Microsoft Office Excel that 
could allow remote code execution if a user opens a specially crafted Excel 
file that includes a malformed object. 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.

Memory Corruption Vulnerability - CVE-2009-0238

A remote code execution vulnerability exists in Microsoft Office Excel that 
could allow remote code execution if a user opens a specially crafted Excel 
file that includes a malformed object. 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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The University of Queensland
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