Rule:

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Sid:
413

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Summary:
This event is generated when a network host generates an ICMP IPV6 Where-Are-You datagram.

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Impact:
ICMP Type 33 datagrams are not expected network traffic.  Hosts generating ICMP Type 33 datagrams should be investigated for hostile activity.

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Detailed Information:
ICMP Type 33 is an undocumented extension to RFC 1812 and RFC 792.  Its current use it not defined by an approved RFC.  

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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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False Positives:
None known

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False Negatives:
None known
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Corrective Action:
Hosts generating ICMP Type 33 datagrams should be investigated for hostile activity.

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Contributors:
Original rule writer unknown
Sourcefire Research Team
Matthew Watchinski (matt.watchinski@sourcefire.com)

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Additional References:
None


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