CVE-2019-6838 Missing authorization in U.motion Servers (MEG6501-0001 - U.motion KNX server, MEG6501-0002 - U.motion KNX Server Plus, MEG6260-0410 - U.motion KNX Server Plus, Touch 10, and MEG6260-0415 - U.motion KNX Server Plus, Touch 1)

Medium 6.5 Published 17 Sep 2019 Updated 4 Aug 2024

Low-privilege users can delete critical files on U.motion KNX servers due to incorrect authorization checks.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2019-6838?

CVE-2019-6838 is a medium-severity missing authorization vulnerability in U.motion Servers (MEG6501-0001 - U.motion KNX server, MEG6501-0002 - U.motion KNX Server Plus, MEG6260-0410 - U.motion KNX Server Plus, Touch 10, and MEG6260-0415 - U.motion KNX Server Plus, Touch 1), published on 17 Sep 2019. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A CWE-863: Incorrect Authorization vulnerability exists in U.motion Server (MEG6501-0001 - U.motion KNX server, MEG6501-0002 - U.motion KNX Server Plus, MEG6260-0410 - U.motion KNX Server Plus, Touch 10, MEG6260-0415 - U.motion KNX Server Plus, Touch 15), which could allow a user with low privileges to delete a critical file.

Weakness: CWE-863

Which versions are affected by CVE-2019-6838?

It affects 4 products.

Products include Schneider-Electric Meg6260-0410 Firmware, Schneider-Electric Meg6260-0415 Firmware, Schneider-Electric Meg6501-0001 Firmware, Schneider-Electric Meg6501-0002 Firmware.

How do I fix CVE-2019-6838?

No fix has been published for CVE-2019-6838 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2019-6838 being exploited?

There is no known exploitation of CVE-2019-6838 in the wild and no public exploit code.

Sources

Also known as GHSA-4hc4-2qgx-7hp4.