Etcd Gateway TLS endpoint validation only confirms TCP reachability in go.etcd.io/etcd

Etcd Gateway TLS endpoint validation only confirms TCP reachability in go.etcd.io/etcd.

NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions.

(If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.)

The additional affected modules and versions are: go.etcd.io/etcd/v3 before v3.3.23, from v3.4.0-rc.0 before v3.4.10.