CVE-2019-18609

An issue was discovered in amqp_handle_input in amqp_connection.c in
rabbitmq-c 0.9.0. There is an integer overflow that leads to heap memory
corruption in the handling of CONNECTION_STATE_HEADER. A rogue server could
return a malicious frame header that leads to a smaller target_size value
than needed. This condition is then carried on to a memcpy function that
copies too much data into a heap buffer.