Advisory Details

March 20th, 2012

RealNetworks RealPlayer Cook Codec Channel Parsing Remote Code Execution Vulnerability

CVE ID	CVE-2011-4257
CVSS SCORE	7.5, AV:N/AC:L/Au:N/C:P/I:P/A:P
AFFECTED VENDORS	RealNetworks
AFFECTED PRODUCTS	RealPlayer
TREND MICRO CUSTOMER PROTECTION	Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID ['12128']. For further product information on the TippingPoint IPS: 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 within how the application parses information out of the codec-specific data located within a media description header. When making space for audio-sample data, the application will allocate a static size. When decoding sample data into this buffer, an overflow will occur which can lead to memory corruption that can lead to code execution under the context of the application.
ADDITIONAL DETAILS	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 2012-03-20 - Coordinated public release of advisory
CREDIT	Damian Put

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