GEN:SID 1:440
Message ICMP Reserved for Security Type 19 undefined code
Summary This event is generated when an ICMP Type 19 datagram with an undefined ICMP Code is detected on the network.
Impact ICMP Type 19 datagrams are not currently used by any known devices.
Detailed Information ICMP Type 19 is not defined for use and is not expected network activity.  Any ICMP datagram with an undefined ICMP Code should be investigated.  
Affected Systems  
Attack Scenarios None known
Ease of Attack Numerous tools and scripts can generate this type of ICMP datagram.
Corrective Action Ingress filtering should be utilized to block incoming ICMP Type 19 datagrams
Additional References None