CVE-2019-6833 Denial of service in Magelis HMI Panels
An attacker can cause a temporary freeze of Schneider Electric Magelis HMI panels by sending a high rate of frames, leading to a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2019-6833?
CVE-2019-6833 is a medium-severity denial of service vulnerability in Schneider Electric SE Magelis HMI Panels, published on 17 Sep 2019. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A CWE-754 – Improper Check for Unusual or Exceptional Conditions vulnerability exists in Magelis HMI Panels (all versions of - HMIGTO, HMISTO, XBTGH, HMIGTU, HMIGTUX, HMISCU, HMISTU, XBTGT, XBTGT, HMIGXO, HMIGXU), which could cause a temporary freeze of the HMI when a high rate of frames is received. When the attack stops, the buffered commands are processed by the HMI panel.
Weakness: CWE-754
Which versions are affected by CVE-2019-6833?
It affects 9 products.
Products include Schneider-Electric Hmigto Firmware, Schneider-Electric Hmigtu Firmware, Schneider-Electric Hmigxo Firmware, Schneider-Electric Hmigxu Firmware, Schneider-Electric Hmiscu Firmware, Schneider-Electric Hmisto Firmware and 3 more.
How do I fix CVE-2019-6833?
No fix has been published for CVE-2019-6833 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2019-6833 being exploited?
There is no known exploitation of CVE-2019-6833 in the wild and no public exploit code.
Sources
Also known as GHSA-w8qp-5q95-q255.