NetTools has a handy diagnostics page: type a host name, press Ping, see the result. Behind the scenes it builds a shell command by pasting your text after the word ping. Shells treat certain characters as "and then run this", so with one extra character your host name becomes a second command. Your goal is to read a secret file on the server. Lab at a glance: Intermediate · 90 XP · about 15 minutes · runs in your browser,…
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