Tiva Events Calender 1.4 Cross Site Scripting – Torchsec
===============
Tiva Events Calender v1.4 - Cross Site Scripting Vulnerability
References (Source):
====================
https://www.vulnerability-lab.com/get_content.php?id=2276
Release Date:
=============
2023-07-05
Vulnerability Laboratory ID (VL-ID):
====================================
2276
Common Vulnerability Scoring System:
====================================
5
Vulnerability Class:
====================
Cross Site Scripting - Persistent
Current Estimated Price:
========================
500€ - 1.000€
Product & Service Introduction:
===============================
Events Calendar For PHP is a powerful PHP calendar script that can be easily integrated and used with various PHP projects,
such as scheduler, event handler, etc. The calendar is simple to install, deploy, and use. It is suitable for all types of
service businesses to get online reservations without any hassles.
(Copy of the Homepage:https://codecanyon.net/item/tiva-events-calendar-for-php/19199337 )
Abstract Advisory Information:
==============================
The vulnerability laboratory core research team discovered a persistent script code inject vulnerability in the Tiva Events Calender v1.4 web-application.
Affected Product(s):
====================
tiva_theme
Product: Tiva Events Calender - Calender PHP (Web-Application)
Vulnerability Disclosure Timeline:
==================================
2021-04-03: Researcher Notification & Coordination (Security Researcher)
2021-04-04: Vendor Notification 1 (Security Department)
2021-06-24: Vendor Notification 2 (Security Department)
2021-07-13: Vendor Notification 3 (Security Department)
****-**-**: Vendor Response/Feedback (Security Department)
****-**-**: Vendor Fix/Patch (Service Developer Team)
****-**-**: Security Acknowledgements (Security Department)
2023-07-05: Public Disclosure (Vulnerability Laboratory)
Discovery Status:
=================
Published
Exploitation Technique:
=======================
Remote
Severity Level:
===============
Medium
Authentication Type:
====================
Restricted Authentication (User Privileges)
User Interaction:
=================
Low User Interaction
Disclosure Type:
================
Responsible Disclosure
Technical Details & Description:
================================
A persistent input validation web vulnerability has been discovered in the official Tiva Events Calender v1.4 web-application.
The vulnerability allows remote attackers to inject own malicious script codes with persistent attack vector to compromise browser
to web-application requests from the application-side.
The vulnerability is located in the name input field and name parameter. Remote attackers privileged user accounts are able to inject
own malicious script codes as name. Thus results in a persistent execute of the script code in the backend on edit but as well in the
frontend (index) were the event is being displayed after the submit (save) via post method request. In the same direction it is possible
to inject malformed client-side executable script code in get request to trigger a non-persistent execution.
Successful exploitation of the vulnerability results in session hijacking, persistent phishing attacks, persistent external redirects
to malicious source and persistent manipulation of affected frontend / backend application modules.
Request Method(s):
[+] POST / GET
Vulnerable Input(s):
[+] Name
Vulnerable Parameter(s):
[+] name
Affected Module(s):
[+] index.php (Frontend on Event Preview)
[+] edit.php (Backend on Edit ID)
Proof of Concept (PoC):
=======================
The persistent input validation web vulnerability can be exploited by remote attackers with low privileged user account and with low user interaction.
For security demonstration or to reproduce the persistent cross site web vulnerability follow the provided information and steps below to continue.
Exploitation: Payload
%20"
Vulnerable Source: Frontend (Index)
Vulnerable Source: Backend (Edit ID)
--- PoC Session Logs (POST) ---
https://tiva-cal.localhost:8080/admin/report/edit.php
Host: tiva-cal.localhost:8080
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Content-Type: multipart/form-data; boundary=---------------------------249785717017581481612148649683
Content-Length: 745
Origin:https://tiva-cal.localhost:8080
Connection: keep-alive
Referer:https://tiva-cal.localhost:8080/admin/report/edit.php
Cookie: PHPSESSID=76gqk14e1s6cce40hfj11
name="%20%20"&type=1&time=20-08-2021&file=temp.txt&save=
-
POST: HTTP/2.0 200 OK
server: nginx
content-type: text/html
content-length: 1283
etag: "503-53ed12f4ca761"
accept-ranges: bytes
strict-transport-security: max-age=15768000; includeSubDomains
-
https://tiva-cal.localhost:8080/admin/report/evil.source
Host: tiva-cal.localhost:8080
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Firefox/91.0
Accept: image/webp,*/*
Connection: keep-alive
Referer:https://tiva-cal.localhost:8080/admin/report/edit.php?id=222
Cookie: PHPSESSID=76gqk14e1s6cce40hfj11
-
GET: HTTP/2.0 200 OK
server: nginx
content-type: text/html
content-length: 1283
etag: "503-53ed12f4ca761"
accept-ranges: bytes
strict-transport-security: max-age=15768000; includeSubDomains
Solution - Fix & Patch:
=======================
The vulnerability can be patched by the following steps ...
1. Encode and escape the name input field content on transmit via post method
2. Restrict the input field and disallow insert of special chars
3. Parse the output location on the index frontend via encode to sanitize and prevent the execute
4. Parse the output location on the edit id report backend via encode to sanitize and prevent the execute
Security Risk:
==============
The security risk of the persistent input validation vulnerability in the web-application is estimated as medium.
Credits & Authors:
==================
Vulnerability-Lab [Research Team] -https://www.vulnerability-lab.com/show.php?user=Vulnerability-Lab
Disclaimer & Information:
=========================
The information provided in this advisory is provided as it is without any warranty. Vulnerability Lab disclaims all warranties,
either expressed or implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability-Lab
or its suppliers are not liable in any case of damage, including direct, indirect, incidental, consequential loss of business profits
or special damages, even if Vulnerability-Lab or its suppliers have been advised of the possibility of such damages. Some states do
not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.
We do not approve or encourage anybody to break any licenses, policies, deface websites, hack into databases or trade with stolen data.
Domains:www.vulnerability-lab.com www.vuln-lab.com www.vulnerability-db.com
Any modified copy or reproduction, including partially usages, of this file requires authorization from Vulnerability Laboratory.
Permission to electronically redistribute this alert in its unmodified form is granted. All other rights, including the use of other
media, are reserved by Vulnerability-Lab Research Team or its suppliers. All pictures, texts, advisories, source code, videos and other
information on this website is trademark of vulnerability-lab team & the specific authors or managers. To record, list, modify, use or
edit our material contact (admin@ or research@) to get a ask permission.
Copyright © 2023 | Vulnerability Laboratory - [Evolution Security GmbH]™
--
VULNERABILITY LABORATORY (VULNERABILITY LAB)
RESEARCH, BUG BOUNTY & RESPONSIBLE DISCLOSURE
Gloss