Zero Day Initiative Advisory 12-086 - This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of RealNetworks RealPlayer. 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 the rvrender module. When parsing an IVR file, the code within this module does not account for a negative value for the "RMFF 1.0 Flags" element within the input data. By providing a specially crafted file an attacker is able to achieve a program state that results in a function pointer value being retrieved from file data and subsequently called. This vulnerability can be leveraged to execute code under the context of the user running the application.
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