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Secunia Research: Microsoft Excel Record Parsing Array Indexing Vulnerability

From: Secunia Research (remove-vulnsecunia.com)
Date: Tue Jun 09 2009 - 14:38:44 CDT


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                     Secunia Research 09/06/2009

   - Microsoft Excel Record Parsing Array Indexing Vulnerability -

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Table of Contents

Affected Software....................................................1
Severity.............................................................2
Vendor's Description of Software.....................................3
Description of Vulnerability.........................................4
Solution.............................................................5
Time Table...........................................................6
Credits..............................................................7
References...........................................................8
About Secunia........................................................9
Verification........................................................10

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1) Affected Software

* Microsoft Office Excel 2000

NOTE: Other versions may also be affected.

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2) Severity

Rating: Highly critical
Impact: System compromise
Where: Remote

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3) Vendor's Description of Software

"Microsoft Office Excel is a powerful tool you can use to create and
format spreadsheets, and analyze and share information to make more
informed decisions.".

Product Link:
http://office.microsoft.com/excel

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4) Description of Vulnerability

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 array-indexing error when
processing certain records. This can be exploited to corrupt memory
via a specially crafted Excel file.

Successful exploitation may allow execution of arbitrary code.

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5) Solution

Apply patches from MS09-021.

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6) Time Table

06/01/2009 - Vendor notified.
07/01/2009 - Vendor response.
08/01/2009 - Additional information provided to the vendor.
08/01/2009 - Vendor response.
19/02/2009 - Vendor provides status update.
24/04/2009 - Vendor provides status update.
22/05/2009 - Vendor provides status update.
09/06/2009 - Public disclosure.

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7) Credits

Discovered by Carsten Eiram, Secunia Research.

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8) References

The Common Vulnerabilities and Exposures (CVE) project has assigned
CVE-2009-0558 for the vulnerability.

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9) About Secunia

Secunia offers vulnerability management solutions to corporate
customers with verified and reliable vulnerability intelligence
relevant to their specific system configuration:

http://secunia.com/advisories/business_solutions/

Secunia also provides a publicly accessible and comprehensive advisory
database as a service to the security community and private
individuals, who are interested in or concerned about IT-security.

http://secunia.com/advisories/

Secunia believes that it is important to support the community and to
do active vulnerability research in order to aid improving the
security and reliability of software in general:

http://secunia.com/secunia_research/

Secunia regularly hires new skilled team members. Check the URL below
to see currently vacant positions:

http://secunia.com/corporate/jobs/

Secunia offers a FREE mailing list called Secunia Security Advisories:

http://secunia.com/advisories/mailing_lists/

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10) Verification

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2009-1/

Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/

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