# Perl, <s>71</s> 62 bytes

*includes +1 for `-n`*

    $b+=y///c;$w+=split$"}{$;=length$b;printf"%$;d %$;d $b",$.,$w

Commented:

    while (<>) {                         # implicit because of -n
        $b += y///c;                     # count characters
        $w += split $"                   # count words
    }{                                   # explicit: end while, begin END block
        $; = length $b;                  # prepare printf formatting, with bareword
        printf "%$;d %$;d $b", $., $w    #  $. = $INPUT_LINE_NUMBER
    }                                    # implicit because of -n

* Save 9 bytes thanks to @TonHospel showing me a few tricks of the trade!