CVE-2020-16850 Denial of service in n/a
Unauthenticated attackers can halt industrial processes on Mitsubishi MELSEC iQ-R PLCs via crafted network packets, requiring physical access to restore production.
- 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-2020-16850?
CVE-2020-16850 is a high-severity denial of service vulnerability in n/a, published on 30 Nov 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Mitsubishi MELSEC iQ-R Series PLCs with firmware 49 allow an unauthenticated attacker to halt the industrial process by sending a crafted packet over the network. This denial of service attack exposes Improper Input Validation. After halting, physical access to the PLC is required in order to restore production, and the device state is lost. This is related to R04CPU, RJ71GF11-T2, R04CPU, and RJ71GF11-T2.
Which versions are affected by CVE-2020-16850?
It affects 19 products.
Products include Mitsubishielectric R00cpu Firmware, Mitsubishielectric R01cpu Firmware, Mitsubishielectric R02cpu Firmware, Mitsubishielectric R04cpu Firmware, Mitsubishielectric R08cpu Firmware, Mitsubishielectric R08pcpu Firmware and 13 more.
How do I fix CVE-2020-16850?
No fix has been published for CVE-2020-16850 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-2020-16850 being exploited?
There is no known exploitation of CVE-2020-16850 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-47gg-jmh3-w48g.