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                     Secunia Research 14/12/2010

             - Microsoft Office TIFF Image Converter -
                - Endian Conversion 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 XP SP3
* Microsoft Office Converter Pack

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 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 potentially compromise a
user's system.

The vulnerability is caused by an error in the TIFF Import/Export 
Graphic Filter (TIFFIM32.FLT) when converting the endianess of certain
data. This can be exploited to corrupt memory via e.g. a specially 
crafted TIFF image.

Successful exploitation may allow execution of arbitrary code when 
processing a TIFF image in an application using the graphics filter 
(e.g. opening the image in Microsoft Photo Editor or importing it into
an Office document).

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5) Solution 

Apply patches provided by MS10-105.

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6) Time Table 

09/07/2009 - Vendor notified.
09/07/2009 - Vendor response.
15/08/2009 - Vendor provides status update.
25/09/2009 - Vendor provides status update.
11/01/2010 - Status update requested.
11/01/2010 - Vendor provides status update (scheduled for May 2010).
30/04/2010 - Vendor provides status update (slipped from May 2010 
             release and now tentatively targetting August 2010).
23/07/2010 - Vendor provides status update (slipped from August 2010 
             release and now tentatively targetting November 2010).
11/08/2010 - Vendor provides status update.
04/11/2010 - Vendor provides status update (slipped from November 2010
             release and now scheduled for December 2010).
08/11/2010 - Vendor informed that December is the final deadline.
14/12/2010 - 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-2010-3949 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
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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
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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/2009-39/

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

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