Secunia Research Advisory

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:

https://www.flexera.com/

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.

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.

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

https://www.flexera.com/company/careers

Secunia offers a FREE mailing list called Secunia Security Advisories:

https://www.flexera.com/secunia_security_advisories/ 

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10) Verification 

Please verify this advisory by visiting the Secunia website:
https://www.flexera.com/about-us/secunia-research/advisories/sr-2008-14.html

Complete list of vulnerability reports published by Secunia Research:
https://www.flexera.com/about-us/secunia-research/advisories/

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