CVE-2020-6986 Denial of service in Omron PLC CJ Series
An attacker can cause a denial of service on Omron PLC CJ Series Ethernet modules by sending specific data packets.
- 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-2020-6986?
CVE-2020-6986 is a high-severity denial of service vulnerability in Omron PLC CJ Series, published on 5 Mar 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In all versions of Omron PLC CJ Series, an attacker can send a series of specific data packets within a short period, causing a service error on the PLC Ethernet module, which in turn causes a PLC service denied result.
Weakness: CWE-400
Which versions are affected by CVE-2020-6986?
It affects 2 products.
Products include Omron Plc Cj1 Firmware, Omron Plc Cj2 Firmware.
How do I fix CVE-2020-6986?
No fix has been published for CVE-2020-6986 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-2020-6986 being exploited?
There is no known exploitation of CVE-2020-6986 in the wild and no public exploit code.
Sources
Also known as GHSA-jpcw-9g3f-frpr.