Secunia Research: Winamp VP6 Content Parsing Buffer Overflow Vulnerability

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                 Secunia Research 27/10/2010

- Winamp VP6 Content Parsing Buffer 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 5.581

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

"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 a vulnerability in Winamp, which can
be exploited by malicious people to potentially compromise a user's
system.

The vulnerability is caused by an error in the VP6 codec (vp6.w5s)
when parsing VP6 video content. This can be exploited to cause a
heap-based buffer overflow via a specially crafted media file or
stream.

Successful exploitation may allow execution of arbitrary code.

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5) Solution

Fixed in version 5.59 Beta Build 3033.

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6) Time Table

20/07/2010 - Vendor notified.
23/07/2010 - Vendor notified (2nd attempt).
29/07/2010 - Vendor responds with proposed patch. Fixed version
expected to be released ultimo September 2010.
02/08/2010 - Secunia confirms that the patch properly fixes the
reported vulnerability. Vendor informed that coordinated
disclosure date is set to 30th September 2010.
27/09/2010 - Status update requested to confirm that the vendor is
on-track for the scheduled disclosure date.
29/09/2010 - Vendor asks for disclosure to be delayed until hearing
back from the development team.
12/10/2010 - Status update requested. Disclosure date now set to 20th
October 2010.
19/10/2010 - Vendor provides status update.
27/10/2010 - Secunia becomes aware that a beta was released, which
includes a changelog mentioning the security fix.
27/10/2010 - 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-2010-1523 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/secunia_research/

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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/2010-95/

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

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