Microsoft Office BMP Image Colour Handling Integer Overflow

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                     Secunia Research 14/10/2009

   - Microsoft Office BMP Image Colour Handling Integer Overflow -

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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 XP


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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 is a complete suite of productivity and database
software that will help you save time and stay organized".

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

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4) Description of Vulnerability

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

The vulnerability is caused due to an integer overflow when processing
the number of colours used in a bitmap image. This can be exploited 
to cause a heap-based buffer overflow via a specially crafted bitmap 
image.

Successful exploitation may allow execution of arbitrary code.

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5) Solution 

Apply patches.

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6) Time Table 

15/08/2008 - Vendor notified.
15/08/2008 - Vendor response.
21/08/2008 - Vendor provides status update.
04/09/2008 - Additional information provided to the vendor.
04/09/2008 - Vendor response.
17/09/2008 - Additional information provided to the vendor.
26/09/2008 - Additional information provided to the vendor.
26/09/2008 - Vendor response.
16/01/2009 - Vendor provides status update.
20/02/2009 - Vendor provides status update.
24/04/2009 - Vendor provides status update.
14/10/2009 - 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-2009-2518 for the vulnerability.

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9) About Secunia

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10) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2008-37/

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

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