CVE-2020-6111 Denial of service in Allen-Bradley
An attacker can cause a denial of service on Allen-Bradley MicroLogix 1100 PLCs by sending a specially crafted packet.
- 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-2020-6111?
CVE-2020-6111 is a high-severity denial of service vulnerability in Allen-Bradley, published on 3 Dec 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An exploitable denial-of-service vulnerability exists in the IPv4 functionality of Allen-Bradley MicroLogix 1100 Programmable Logic Controller Systems Series B FRN 16.000, Series B FRN 15.002, Series B FRN 15.000, Series B FRN 14.000, Series B FRN 13.000, Series B FRN 12.000, Series B FRN 11.000 and Series B FRN 10.000. A specially crafted packet can cause a major error, resulting in a denial of service. An attacker can send a malicious packet to trigger this vulnerability.
Weakness: CWE-189
Which versions are affected by CVE-2020-6111?
It affects 1 product.
Products include Rockwellautomation Micrologix 1100 B Firmware.
How do I fix CVE-2020-6111?
No fix has been published for CVE-2020-6111 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-2020-6111 being exploited?
There is no known exploitation of CVE-2020-6111 in the wild and no public exploit code.
Sources
Also known as GHSA-43vh-m5cv-9pgr.