This indicates an attack attempt against a denial-of-service vulnerability in RealNetworks RealPlayer.
The vulnerability is caused by improper parsing of MP3 files. Remote attackers can exploit it to cause a denial of service by enticing victims to open a specially-crafted MP3 playlist file.
Real Networks RealPlayer Gold 10.0
Denial of Service: Remote attackers can crash vulnerable systems.
Currently we are not aware of any vendor supplied patch for this issue.