This indicates an attack attempt to exploit a Remote Code Execution and Denial of Service vulnerability in Cisco Adaptive Security Appliance (ASA).
The vulnerability is due to an error when the vulnerable software handles a maliciously crafted request. A remote attacker may be able to exploit this to execute arbitrary code or cause a denial of service condition within the context of the application, via a crafted request.
Cisco Adaptive Security Appliance (ASA) Software
System Compromise: Remote attackers can gain control of vulnerable systems.
Denial of Service: Remote attacker can crash vulnerable systems.
Apply the most recent upgrade or patch from the vendor.