security: malicious commands can exhaust resources of the host os

[HackingRepo]

Hi, @sylvestre and in general uutils mainteners

we found that the playground have 2 flaws that lead to resource exhaustation, example https://uutils.org/playground/?cmd=seq%201%209999999999999999999 and https://uutils.org/playground/?cmd=truncate%20--size%2020G%20a can exhaust the host memory and killing the browser process via OOM as i confirmed via firefox

the malicious commands is truncate --size 20G a and seq 1 9999999999999999999 they able kill the browser process entirely

[sylvestre]

yeah, not a big deal IMHO :)