This indicates an attack attempt to exploit a Buffer Overflow vulnerability in RealNewtorks RealPlayer.
The vulnerability is due to an error when the vulnerable software handles a maliciously crafted Microsoft .url file with extension associated with RealPlayer. A remote attacker may be able to exploit this to execute arbitrary code within the context of the application, via a crafted Microsoft .url file.
RealNetworks RealPlayer 220.127.116.11 and prior
System Compromise: Remote attackers can gain control of vulnerable systems.
Currently we are unaware of any vendor supplied patch or updates available for this issue.