Technical Details
The two protocols involved in the vulnerability are termed the carrier and target. The carrier encapsulates the commands and/or data. The target protocol is used for communication to the intended victim service. Inter-protocol communication will be successful if the carrier protocol can encapsulate the commands and/or data sufficiently to meaningfully communicate to the target service.
Two preconditions need to be met for successful communication across protocols: encapsulation and error tolerance. The carrier protocol must encapsulate the data and commands in a manner that the target protocol can understand. It is highly likely that the resulting data stream with induce parsing errors in the target protocol.
The target protocol be must be sufficiently forgiving of errors. During the Inter-Protocol connection it is likely that a percentage of the communication will be invalid and cause errors. To meet this precondition, the target protocol implementation must continue processing despite these errors.
Read more about this topic: Inter-protocol Communication
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