This indicates an attack attempt to exploit a denial-of-service vulnerability
in Adobe Shockwave Flash. This vulnerability can be exploited via a crafted Flash file (SWF).
Adobe Flash Player 10.0.42.34 and earlier versions
Adobe AIR version 188.8.131.520 and earlier versions
Denial of Service: Remote attackers can crash vulnerable systems.
Upgrade to the latest version, available from the vendor's web site: