Why does busybox ping expect root?
$ ping dec.com -c1
PING dec.com (216.239.32.21) 56(84) bytes of data.
64 bytes from any-in-2015.1e100.net (216.239.32.21): icmp_seq=1 ttl=119 time=54.9 ms
--- dec.com ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 54.855/54.855/54.855/0.000 ms
$ busybox ping dec.com -c1
PING dec.com (216.239.34.21): 56 data bytes
ping: permission denied (are you root?)
ping
always requires root. Usually it's setuid.