Handshake messages, such as KeyUpdate, are always considered as state-advancing, regardless of whether a handshake has been completed or not. As a result, a malicious client can keep sending KeyUpdate messages to force the server to keep performing key derivation operations indefinitely.
{
"cpes": [
"cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*"
],
"severity": "High"
}