This indicates a possible exploit of a Buffer Overflow vulnerability in the Symantec AntiVirus.
This vulnerability is due to incorrect handling of objects in memory when parsing files with malformed PE headers. A remote attacker may be able to exploit this to execute arbitrary code within the context of the application, via a crafted file.
Symantec Anti Virus Engine prior to 20184.108.40.206
System Compromise: Remote attackers can gain control of vulnerable systems
Apply the most recent upgrade or patch from the vendor