This indicates an attack attempt against a OS Command Execution vulnerability in Redhat JBoss Application Server.
The vulnerability is due to an error in the vulnerable application when handling a maliciously crafted request. A remote attacker may be able exploit this to execute arbitrary code within the context of the application via crafted requests.
Red Hat JBoss Enterprise Application Platform 5.x
System Compromise: Remote attacker can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor