CVE-2020-13573 Denial of service in Rockwell Automation

High 7.5 Published 7 Jan 2021 Updated 4 Aug 2024

An attacker can cause a denial of service in Rockwell Automation RSLinx Classic by sending specially crafted network requests to the Ethernet/IP server.

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-2020-13573?

CVE-2020-13573 is a high-severity denial of service vulnerability in Rockwell Automation, published on 7 Jan 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A denial-of-service vulnerability exists in the Ethernet/IP server functionality of Rockwell Automation RSLinx Classic 2.57.00.14 CPR 9 SR 3. A specially crafted network request can lead to a denial of service. An attacker can send a sequence of malicious packets to trigger this vulnerability.

Weakness: CWE-119, CWE-823

Which versions are affected by CVE-2020-13573?

It affects 1 product.

Products include Rockwellautomation Rslinx.

How do I fix CVE-2020-13573?

No fix has been published for CVE-2020-13573 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-2020-13573 being exploited?

There is no known exploitation of CVE-2020-13573 in the wild and no public exploit code.

Sources

Also known as GHSA-6crx-v72m-r4wf.