Command Injection Proof of Concept

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PHP Code

<!DOCTYPE html> <html>

       <body>

PING

               <form method="post">
                 <label for="fname">IP</label>
<input type="text" name="ip">
<input type="submit" name="submit" value="submit"> </form>

<?php

 if(isset($_POST['submit'])){
   $ip = $_POST['ip'];
   $cmd = 'ping -c 4 ' . $ip;
   $output = shell_exec($cmd);

echo "

$output<nowiki>

";

 }

?>

       </body>

</html>