CVE-2020-10921 Missing authorization in HMI EA9

Critical 9.8 Published 23 Jul 2020 Updated 4 Aug 2024

Remote attackers can issue commands to physical equipment via unauthenticated HTTP requests on C-MORE HMI panels.

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

What is CVE-2020-10921?

CVE-2020-10921 is a critical missing authorization vulnerability in C-MORE HMI EA9, published on 23 Jul 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

This vulnerability allows remote attackers to issue commands on affected installations of C-MORE HMI EA9 Firmware version 6.52 touch screen panels. Authentication is not required to exploit this vulnerability. The specific flaw exists within the EA-HTTP.exe process. The issue results from the lack of authentication prior to allowing alterations to the system configuration. An attacker can leverage this vulnerability to issue commands to the physical equipment controlled by the device. Was ZDI-CAN-10482.

Weakness: CWE-306

Which versions are affected by CVE-2020-10921?

It affects 1 product.

Products include Automationdirect C-More Hmi Ea9 Firmware.

How do I fix CVE-2020-10921?

No fix has been published for CVE-2020-10921 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-2020-10921 being exploited?

There is no known exploitation of CVE-2020-10921 in the wild and no public exploit code.

Sources

Also known as GHSA-g78v-7xhx-6j98.