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                     Secunia Research 17/12/2009

    - Winamp Impulse Tracker Instrument Parsing Buffer Overflows -

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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 5.56 Media Player

NOTE: Other versions may also be affected.

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2) Severity 

Rating: Highly critical
Impact: System access
Where:  From remote

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3) Vendor's Description of Software 

"It is more than just a player. It's your window to the multimedia
world. From MP3s to streaming video, Winamp is the one place you go to
feed your audio/video habit.".

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

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4) Description of Vulnerability

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

The vulnerabilities are caused by boundary errors in the Module 
Decoder Plug-in (IN_MOD.DLL) when parsing instrument definitions and 
can be exploited to cause heap-based buffer overflows via a specially 
crafted Impulse Tracker file.

Successful exploitation may allow execution of arbitrary code.

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5) Solution 

Update to version 5.57.

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6) Time Table 

03/12/2009 - Vendor notified.
03/12/2009 - Vendor response.
17/12/2009 - 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-2009-3995 for the vulnerability.

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9) About Secunia

Secunia offers vulnerability management solutions to corporate
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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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10) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2009-52/

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

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