Malformed Messages Sample Clauses
Malformed Messages. Implementations of OPC UA client and server products counter threats of malformed messages by checking that messages have the proper form and that parameters of messages are within their legal range. This is specified in [UA Part 6] and a similar specification regarding range checking of parameters of services is in [UA Part 4].
Malformed Messages. An attacker can craft a variety of messages with invalid message structure (malformed XML, SOAP, malicious binary encodings, etc.) or data values and send them to OPC-UA clients or servers. The OPC client or server may incorrectly handle certain malformed messages by performing unauthorized operations or disclosing unnecessary information. It might result in a denial or degradation of service including termination of the application or, in the case of embedded devices, a complete crash. Malformed messages impact integrity and availability.