This indicates an attack attempt against a Memory Corruption vulnerability in Adobe Shockwave Player.
The vulnerability is due to an error when the vulnerable software handles a maliciously crafted DIR file. A remote attacker may be able to exploit this to execute arbitrary code within the context of the application, via a crafted DIR file.
Adobe Shockwave Player 220.127.116.11 and earlier
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.