CVE-2020-3409 Cisco IOS and IOS XE Software PROFINET Denial of Service Vulnerability

High 7.4 Published 24 Sep 2020 Updated 13 Nov 2024

An unauthenticated adjacent attacker can crash Cisco IOS devices by sending crafted PROFINET packets, causing a denial of service.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2020-3409?

CVE-2020-3409 is a high-severity denial of service vulnerability in Cisco Ios, published on 24 Sep 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability in the PROFINET feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause an affected device to crash and reload, resulting in a denial of service (DoS) condition on the device. The vulnerability is due to insufficient processing logic for crafted PROFINET packets that are sent to an affected device. An attacker could exploit this vulnerability by sending crafted PROFINET packets to an affected device for processing. A successful exploit could allow the attacker to cause the device to crash and reload, resulting in a DoS condition on the device.

Weakness: CWE-400, CWE-20

Which versions are affected by CVE-2020-3409?

It affects 2 products.

Products include Cisco Ios, Cisco Ios Xe.

How do I fix CVE-2020-3409?

No fix has been published for CVE-2020-3409 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-2020-3409 being exploited?

There is no known exploitation of CVE-2020-3409 in the wild and no public exploit code.

All Cisco Ios vulnerabilities

Sources

Also known as GHSA-v4cp-84g9-jwmp.