This indicates an attempt to exploit a buffer-overflow vulnerability in Symantec Norton Internet Security 2008 and prior versions.
The vulnerability is caused by an input parameter check error in the GetEventLogInfo method. It allows a remote attacker to execute arbitrary code in the victim's system by sending a long parameter to this method.
Symantec Norton Internet Security 2008 and prior versions
System compromise: remote code execution.
Apply the patch from the vendor. More details can be found at the following web site: