This indicates an attack attempt against a Heap Buffer Overflow vulnerability in Microsoft DirectPlay.
The vulnerability is caused by an error when the vulnerable software handles a malicious file. A remote attacker may be able to exploit this to execute arbitrary code within the context of the application, via a crafted file.
Microsoft Windows 7
Microsoft Windows 8
Microsoft Windows Server 2008
Microsoft Windows Vista
Microsoft Windows XP
Microsoft Windows Server 2003
Microsoft Windows Server 2012
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.