Advisory Details

March 22nd, 2012

RealNetworks RealPlayer RTSP SETUP Request Remote Code Execution Vulnerability

CVE ID	CVE-2011-4254
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 ['12165']. 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 due to the application mishandling an error that occurs when parsing an RTSP SETUP request. When an error occurs, the application will free a pointer to a linked list due to the stream being closed. Following this, the application will then attempt to access the freed element whilst traversing the list. This can lead to a use-after-free condition and 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 2012-03-22 - Coordinated public release of advisory
CREDIT	Luigi Auriemma

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