This indicates an attack attempt against an Integer Underflow vulnerability in memcached.
The vulnerability is caused by an error when the vulnerable software handles multiple commands and the body_len parameter of a Memcached
binary protocol packet. A remote unauthenticated attacker may be able to exploit this to execute arbitrary code in the context of the user.
Memcached Project Memcached prior to 1.4.33
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the latest update from the vendor.