CVE-2021-20600 Denial of service in Mitsubishi Electric MELSEC iQ-R series C Controller Module R12CCPU-V
Remote unauthenticated attackers can cause a denial-of-service condition on Mitsubishi MELSEC iQ-R controllers by flooding packets during startup.
- 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-2021-20600?
CVE-2021-20600 is a medium-severity denial of service vulnerability in Mitsubishi Electric MELSEC iQ-R series C Controller Module R12CCPU-V, published on 8 Oct 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Uncontrolled resource consumption in Mitsubishi Electric MELSEC iQ-R series C Controller Module R12CCPU-V Firmware Versions "16" and prior allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition by sending a large number of packets in a short time while the module starting up. System reset is required for recovery.
Weakness: CWE-400
Which versions are affected by CVE-2021-20600?
It affects 1 product.
Products include Mitsubishielectric R12ccpu-v Firmware.
How do I fix CVE-2021-20600?
No fix has been published for CVE-2021-20600 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-2021-20600 being exploited?
There is no known exploitation of CVE-2021-20600 in the wild and no public exploit code.
Sources
Also known as GHSA-8r87-v86x-7qm3.