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                     Secunia Research 03/03/2009

       - Winamp CAF Processing Integer Overflow 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 

* Winamp 5.541 and 5.55

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 

"... Winamp, The #1 Free Media Player. Play your MP3, AAC, MPEG, AVI 
files, and more. Get free MP3 songs, videos, skins and plug-ins. 
Synch your iPod or Creative Zen, and get mobile music with Winamp 
Remote."

Product Link:
http://www.winamp.com/ 

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4) Description of Vulnerability

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

The vulnerability is caused due to an integer overflow error in the 
libsndfile.dll library while processing CAF description chunks. This 
can be exploited to cause a heap-based buffer overflow by tricking a
user into processing a specially crafted CAF audio file.

Successful exploitation may allow execution of arbitrary code.

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5) Solution 

Do not open untrusted CAF files in Winamp.

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6) Time Table 

20/02/2009 - Vendor notified.
21/02/2009 - Vendor response.
03/03/2009 - libsndfile upstream releases fixed version and details.
03/03/2009 - Public disclosure.

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7) Credits 

Discovered by Alin Rad Pop, Secunia Research.

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8) References

The Common Vulnerabilities and Exposures (CVE) project has assigned
CVE-2009-0186 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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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/2009-8/ 

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

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