Date: Mon, 28 Nov 2011 12:20:46 -0600
From: ZDI Disclosures <zdi-disclosures@...pingpoint.com>
To: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com
Subject: ZDI-11-336 : RealNetworks RealPlayer Invalid Codec Name Remote Code
 Execution Vulnerability

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ZDI-11-336 : RealNetworks RealPlayer Invalid Codec Name Remote Code
Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-11-336
November 28, 2011

- -- CVE ID:
CVE-2011-4255

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

- -- Affected Vendors:

RealNetworks



- -- Affected Products:

RealNetworks RealPlayer



- -- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 11661.
For further product information on the TippingPoint IPS, visit:

    http://www.tippingpoint.com

- -- 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 when a user attempts to play a malicious video
file containing a malformed codec name. When playing a malformed codec,
the application will incorrectly free an object and then later attempt
to use it by calling a virtual method pointer upon destruction. This 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/11182011_player/en/



- -- Disclosure Timeline:
2011-08-12 - Vulnerability reported to vendor
2011-11-28 - Coordinated public release of advisory

- -- Credit:
This vulnerability was discovered by:

* Damian Put



- -- About the Zero Day Initiative (ZDI):
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disclosing discovered vulnerabilities.

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