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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 input validation, the C-MOR web interface is vulnerable
to reflected cross-site scripting attacks.

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Vulnerability Details:

By analyzing the C-MOR web interface, it was found that different
functions are prone to reflected cross-site scripting attacks due to
insufficient user input validation.

This kind of attack allows an attacker to send a manipulated link to
an authenticated victim in order to execute arbitrary JavaScript code
in the context of the victim's web browser.

Reflected cross-site scripting vulnerabilities were found in the
following C-MOR scripts and exploited via different URL parameters,
for instance the parameter "ujava":

* index-de.plm
* list-timelapse.plm
* list-motion.plm
* setdelays.plm
* show-movies.plm
* show-movies-f.plm
* uploadcambackup.plm

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Proof of Concept (PoC):

The following three sample attack vectors exemplarily demonstrate
the found security issue.

1) index-de.plm

The following URL is an example of an attack vector exploiting a
reflected cross-site scripting vulnerability via the URL parameter
"ujava" of the web interface index page "index-de.plm":

https://<HOST>/index-de.pml?ujava="><script>alert("SySS XSS!")</script><z="

2) list-timelapse.plm

The following URL is an example of an attack vector exploiting a
reflected cross-site scripting vulnerability in the page
"list-timelapse.plm" via the URL parameter "days":

https://<HOST>/list-timelapse.pml?days=1100&cam=cam1"><script>alert("SySS
XSS!")</script><z="

3) show-movies.plm

The following URL is an example of an attack vector exploiting a
reflected cross-site scripting vulnerability in the page
"show-movies.plm" via the URL parameter "days":

https://<HOST>/show-movies.pml?cam=cam1&days="><script>alert("SySS
XSS!")</script><z="

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Solution:

Install C-MOR Video Surveillance version 6.00PL1.

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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

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References:

[1] Product website for C-MOR Video Surveillance
https://www.c-mor.com/
[2] SySS Security Advisory SYSS-2024-020

https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2024-020.txt
[3] SySS Responsible Disclosure Policy
https://www.syss.de/en/responsible-disclosure-policy/

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Credits:

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

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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.

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Copyright:

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