-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Advisory ID: SYSS-2024-024 Product: C-MOR Video Surveillance Manufacturer: za-internet GmbH Affected Version(s): 5.2401 Tested Version(s): 5.2401 Vulnerability Type: Improper Access Control (CWE-284) Risk Level: High Solution Status: Fixed Manufacturer Notification: 2024-04-05 Solution Date: 2024-07-31 Public Disclosure: 2024-09-04 CVE Reference: CVE-2024-45170 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 improper or missing access control, low-privileged users can use administrative functions of the C-MOR web interface. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Vulnerability Details: By analyzing the C-MOR web interface, it was found that different functions are only available to administrative users. However, access to those functions is restricted via the web application user interface and not checked on the server side. Thus, by sending corresponding HTTP requests to the web server of the C-MOR web interface, low-privileged users can also use administrative functionality, for instance downloading backup files or changing configuration settings. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Proof of Concept (PoC): In this example, a low-privileged user downloads backup files by directly sending a corresponding HTTP POST request to the page "download-bkf.pml". For this, the following HTML code can be used:

This PoC attack can also be performed using the following curl command: curl -X POST -d '' --user '' --ciphers 'DEFAULT:!DH' https:///download-bkf.pml ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Solution: Install C-MOR Video Surveillance version 6.00PL1. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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-2024-024 https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2024-024.txt [3] SySS Responsible Disclosure Policy https://www.syss.de/en/responsible-disclosure-policy/ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Credits: This security vulnerability was found by Chris Beiter, 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 -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEE0fCgNfBs5nXNuQUU2aS/ajStTasFAmbW+vcACgkQ2aS/ajSt TavnjA//RovpuWe2xA3k9kgVufL8CGaheafNJlqx3yCv7kWm17UkJtX6w+9iF0a9 4O26VJ2lweU8/bjIR7TXLOhE1AlaV68f/4qaKOLQ7Y6mzW7PJGN2+WiLPV7LWuBv VJvYqjaBcEQpTzbEHb2uGT4G7sfxIAfViMXSGJUhFQKma1SLXvfUIxrGjNiPjELb uf3lproyLKCsn/Vc8Juhr4nF71Wn4mT6ZXe5i3z9ER9CH6rPjZbvtChkFK9TlmCl GSXJzOtJ79M70NlVxnW8t81612S19lyOj35gblz2aEs+ZBPkkXwAx21nUQmOjdlX WSW/z5Q1hL/uqEhpKnGtMvL0kQ5xGl7B111mgqfao8EpHSEQ1W/fkBIIcL4Lvywz KatofJ3O7MFmqVSrOczbT8OXS4H9IGCA/CnC8W8RfMeIOqxtPJWMaGLC6cPLgGbX ki3tTVJmMD8JHhv97P45n50UajWYtYHPJOXFuYcdlw1mZaUeNZcoqKU0Ho8VZ15M TMFLVI8LHmxljmrNWlf7lJmgpw8lWoXTNKRWK3rp+om1+od1LBmARitOZWBg+Wgj BOgUzCmtuISRx+CnJQ5nerYBU71b5m0UC4w52+Ul6uUhbahXw016YTYCBjrHfdF+ Z5CQI4GbdEnwX6Gtwbz4bdViUpJQJFkpInFqDG1pobJ7qHDyj8M= =NTiu -----END PGP SIGNATURE-----