rclone local `--metadata` applies attacker-controlled mode/uid - setuid binary planted from an untrusted remote

Summary When writing an object with metadata, the local backend applies the source-supplied mode, uid, and gid verbatim: it parses mode as an octal integer and passes it straight into os.Chmodo.path, os.FileModeumode, and passes uid/gid straight into os.Chown. The value is never masked to...