Secunia Research: Adobe Acrobat/Reader "util.printf()" Buffer Overflow

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                     Secunia Research 04/11/2008

       - Adobe Acrobat/Reader "util.printf()" Buffer 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 

* Adobe Acrobat / Reader version 8.1.2

NOTE: Other versions may also be affected.

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2) Severity 

Rating: Highly critical
Impact: System access
Where:  Remote

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3) Vendor's Description of Software 

"Adobe Acrobat 8 Professional software enabled business professionals
to reliably create, combine, and control Adobe PDF documents for
easy, more secure distribution, collaboration, and data collection."

Product Link: http://www.adobe.com/products/acrobat/

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4) Description of Vulnerability

Secunia Research has discovered a vulnerability in Adobe 
Acrobat/Reader, which can be exploited by malicious people to 
compromise a user's system.

The vulnerability is caused due to a boundary error when parsing
format strings containing a floating point specifier in the
"util.printf()" Javascript function and can be exploited to cause a
stack-based buffer overflow via a specially crafted PDF.

Successful exploitation may allow execution of arbitrary code when 
viewing a malicious PDF file.

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5) Solution 

The vendor will be releasing fixes later today.

NOTE: This was supposed to be a coordinated disclosure with Adobe, but
a third party has leaked the information.

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6) Time Table 

16/04/2008 - Vendor notified.
17/04/2008 - Vendor response.
09/05/2008 - Vendor informed that similar vulnerability will be fixed
             in Foxit Reader this month.
10/05/2008 - Vendor response thanking for the heads-up.
20/05/2008 - Similar vulnerability published for Foxit Reader.
22/10/2008 - Vendor provides status update.
31/10/2008 - Vendor provides another status update along with a draft
             of the upcoming security bulletin.
04/11/2008 - Public disclosure.

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7) Credits 

Discovered by Dyon Balding, Secunia Research.

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8) References

The Common Vulnerabilities and Exposures (CVE) project has assigned 
CVE-2008-2992 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://corporate.secunia.com/

Secunia also provides a publicly accessible and comprehensive advisory
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http://secunia.com/

Secunia believes that it is important to support the community and to
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10) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2008-14/

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

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