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ZDI-11-266: RealNetworks RealPlayer Advanced Audio Coding Element Remote Code Execution Vulnerability
From: ZDI Disclosures <zdi-disclosures () tippingpoint com>
Date: Tue, 16 Aug 2011 23:06:30 +0100

ZDI-11-266: RealNetworks RealPlayer Advanced Audio Coding Element Remote Code Execution Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-11-266

August 16, 2011

-- CVE ID:
CVE-2011-2951

-- CVSS:
7.5, (AV:N/AC:L/Au:N/C:P/I:P/A:P)

-- Affected Vendors:
RealNetworks

-- Affected Products:
RealNetworks RealPlayer

-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of RealNetworks Real Player. User interaction
is required to exploit this vulnerability in that the target must visit
a malicious page or open a malicious file.

The specific flaw exists due to the application using a size defined in
a header in order to allocate some number of bytes. When processing an
AAC raw_data_frame, the application will use the product of the original
length and a field inside one of its elements. During the copy
operation, this length will be larger than the amount that was allocated
for which will cause a buffer overflow and can lead to code execution
under the context of the application.

-- Vendor Response:
RealNetworks has issued an update to correct this vulnerability. More
details can be found at:
http://service.real.com/realplayer/security/08162011_player/en/

-- Disclosure Timeline:
2011-05-13 - Vulnerability reported to vendor
2011-08-16 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * Donato Ferrante
    * Andrzej Dyjak

-- About the Zero Day Initiative (ZDI):
Established by TippingPoint, The Zero Day Initiative (ZDI) represents 
a best-of-breed model for rewarding security researchers for responsibly
disclosing discovered vulnerabilities.

Researchers interested in getting paid for their security research
through the ZDI can find more information and sign-up at:

    http://www.zerodayinitiative.com

The ZDI is unique in how the acquired vulnerability information is
used. TippingPoint does not re-sell the vulnerability details or any
exploit code. Instead, upon notifying the affected product vendor,
TippingPoint provides its customers with zero day protection through
its intrusion prevention technology. Explicit details regarding the
specifics of the vulnerability are not exposed to any parties until
an official vendor patch is publicly available. Furthermore, with the
altruistic aim of helping to secure a broader user base, TippingPoint
provides this vulnerability information confidentially to security
vendors (including competitors) who have a vulnerability protection or
mitigation product.

Our vulnerability disclosure policy is available online at:
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