GHSA-6ggr-cwv4-g7qg: Remotely exploitable denial of service in Rosenpass

Affected versions of this crate did not validate the size of buffers when attempting to decode messages.

This allows an attacker to trigger a panic by sending a UDP datagram with a 1 byte payload over network.

This flaw was corrected by validating the size of the buffers before attempting to decode the message.