[GYCTF2020]EasyThinking.md

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相关漏洞

ThinkPHP 6.0.0 - 6.0.1 Arbitrary File Write Vulnerability

利用

扫目录发现www.zip

发现/web/app/home/controller/Member.php中存在使用POST方法传递的数据进行写入

public function search()
{
	if (Request::isPost()){
		if (!session('?UID'))
		{
			return redirect('/home/member/login');            
		}
		$data = input("post.");
		$record = session("Record");
		if (!session("Record"))
		{
			session("Record",$data["key"]);
		}
		else
		{
			$recordArr = explode(",",$record);
			$recordLen = sizeof($recordArr);
			if ($recordLen >= 3){
				array_shift($recordArr);
				session("Record",implode(",",$recordArr) . "," . $data["key"]);
				return View::fetch("result",["res" => "There's nothing here"]);
			}

		}
		session("Record",$record . "," . $data["key"]);
		return View::fetch("result",["res" => "There's nothing here"]);
	}else{
		return View("search");
	}
}

对应的是这个路径

/home/member/search

修改PHPSESSID，最终效果是key的值被写入/runtime/session/sess_<PHPSESSID>中

/runtime/session/sess_xxx.php?cmd=phpinfo();

antsword连接之后使用插件绕过disable_functions

#Web #Vulnerabilities #PHP #thinkphp #disable_functions #antsword