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Microsoft Excel rtWnDesk Record Memory Corruption Vulnerability Advisory Available in Danish  Advisory Available in German 

Secunia Advisory: SA26145  
Release Date: 2007-08-14

Critical:
Highly critical
Impact: System access
Where: From remote
Solution Status: Vendor Patch

Software:Microsoft Excel 2000
Microsoft Excel 2002
Microsoft Excel 2003
Microsoft Excel Viewer 2003
Microsoft Office 2000
Microsoft Office 2003 Professional Edition
Microsoft Office 2003 Small Business Edition
Microsoft Office 2003 Standard Edition
Microsoft Office 2003 Student and Teacher Edition
Microsoft Office 2004 for Mac
Microsoft Office XP

CVE reference:CVE-2007-3890 (Secunia mirror)

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Description:
Secunia Research has discovered a vulnerability in Microsoft Excel, which can be exploited by malicious people to compromise a user's system.

The vulnerability is caused due to an error when validating an index value in the rtWnDesk record and can be exploited to corrupt memory via a specially crafted Excel Workspace (XLW) file.

Successful exploitation may allow execution of arbitrary code.

Other unspecified security issues discovered internally by Microsoft have also been reported.

Do you have this product installed on your home computer? Scan using the free Personal Software Inspector. Check if a vulnerable version is installed on computers in your corporate network, scan using the Network Software Inspector.

Solution:
Apply patches.

Microsoft Office 2000 SP3:
http://www.microsoft.com/downloads/de...082B98F7-9556-4F1F-823A-C41DDF5A7C9A

Microsoft Office XP SP3:
http://www.microsoft.com/downloads/de...=91308769-2577-4F9F-8209-06F2C8C8A86F

Microsoft Office 2003 SP2:
http://www.microsoft.com/downloads/de...=B0130E9E-8845-4D79-AAA1-A21CC9388ABE

Microsoft Excel Viewer 2003:
http://www.microsoft.com/downloads/de...=C4A87572-3128-44F7-8069-95535A78500A

Microsoft Office 2004 for Mac:
http://www.microsoft.com/mac/downloads.aspx#Office2004

Provided and/or discovered by:
Dyon Balding, Secunia Research.

Original Advisory:
MS07-044 (KB940965):
http://www.microsoft.com/technet/security/Bulletin/MS07-044.mspx



Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.

Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

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6. Microsoft Office Publisher File Parsing Vulnerabilities
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10. Microsoft Excel Multiple Code Execution Vulnerabilities

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