| GEN:SID | 1:428 |
| Message | ICMP Parameter Problem undefined Code |
| Summary | This event is generated when a host generates and ICMP Parameter Problem datagram with an undefined ICMP Code.
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| Impact | ICMP datagrams should never contain undefined ICMP Codes. This is normally an indication of nefarious activity occurring on the network.
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| Detailed Information | A router generates a Parameter Problem message for any error not specifically covered by another ICMP message. This could be an indication of routing problems on the network, or malfunctioning routing hardware.
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| Affected Systems | |
| Attack Scenarios | None known
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| Ease of Attack | Numerous tools and scripts can generate this type of ICMP datagram.
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| Corrective Action | ICMP Type 12 datagrams with undefined ICMP Codes are not normal network activity. Hosts generating these types of datagrams should be investigated for configuration errors or nefarious activity.
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| Additional References | None
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