Memory Allocation with Excessive Size Value

Summary

@grpc/grpc-js implements the core functionality of gRPC purely in JavaScript, without a C++ addon. In @grpc/grpc-js versions through 1.8.21, 1.9.0 through 1.9.14, and 1.10.0 through 1.10.8, there are two separate code paths in which memory can be allocated per message in excess of the "grpc.max_receive_message_length" channel option: If an incoming message has a size on the wire greater than the configured limit, the entire message is buffered before it is discarded; and/or if an incoming message has a size within the limit on the wire but decompresses to a size greater than the limit, the entire message is decompressed into memory, and on the server is not discarded.