This indicates an attack attempt to exploit a Denial of Service vulnerability in Nero MediaHome.
The vulnerability is due to insufficient sanitizing of user supplied inputs in the application when handling a crafted HTTP request. A remote attacker may be able to exploit this to cause a denial of service condition on the affected system, via a crafted HTTP request.
Nero MediaHome 18.104.22.168
Denial of Service: Remote attackers can crash vulnerable systems or services
Currently we are unaware of any vendor supplied patch for this issue.