CVE-2019-6819 Denial of service in Modicon Controllers, Modicon M340 - firmware versions prior to V3.01 Modicon M580 - firmware versions prior to V2.80 All firmware versions of Modicon Quantum and Modicon Premium
Attackers can cause a denial of service on Schneider Modicon controllers by sending specific Modbus frames, impacting industrial control system availability.
- 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-2019-6819?
CVE-2019-6819 is a high-severity denial of service vulnerability in Modicon Controllers, Modicon M340 - firmware versions prior to V3.01 Modicon M580 - firmware versions prior to V2.80 All firmware versions of Modicon Quantum and Modicon Premium, published on 22 May 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists which could cause a possible Denial of Service when specific Modbus frames are sent to the controller in the products: Modicon M340 - firmware versions prior to V3.01, Modicon M580 - firmware versions prior to V2.80, All firmware versions of Modicon Quantum and Modicon Premium.
Weakness: CWE-754
Which versions are affected by CVE-2019-6819?
It affects 4 products.
Products include Schneider-Electric Modicon M340 Firmware, Schneider-Electric Modicon M580 Firmware, Schneider-Electric Modicon Premium Firmware, Schneider-Electric Modicon Quantum Firmware.
How do I fix CVE-2019-6819?
No fix has been published for CVE-2019-6819 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-2019-6819 being exploited?
There is no known exploitation of CVE-2019-6819 in the wild and no public exploit code.
Other vulnerabilities in Modicon Controllers, Modicon M340 - firmware versions prior to V3.01 Modicon M580 - firmware versions prior to V2.80 All firmware versions of Modicon Quantum and Modicon Premium
- CVE-2018-7842 Auth bypass in Modicon M580 Modicon M340 Modicon Quantum Modicon Premium
- CVE-2018-7846 Auth bypass in Modicon M580 Modicon M340 Modicon Quantum Modicon Premium
- CVE-2018-7847 Missing authorization in Modicon M580 Modicon M340 Modicon Quantum Modicon Premium
- CVE-2019-6808 Missing authorization in Modicon M580 Modicon M340 Modicon Quantum Modicon Premium
- CVE-2019-6845 Information disclosure in Modicon M580, Modicon M340, Modicon Premium , Modicon Quantum (all firmware versions)
Sources
Also known as GHSA-vf99-3r9r-pp36.