CVE-2020-3512 Cisco IOS and IOS XE Software PROFINET Link Layer Discovery Protocol Denial of Service Vulnerability

High 7.4 Published 24 Sep 2020 Updated 13 Nov 2024

An unauthenticated adjacent attacker can cause a device crash and reload by sending malicious PROFINET LLDP messages to Cisco IOS devices.

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-2020-3512?

CVE-2020-3512 is a high-severity denial of service vulnerability in Cisco Ios Xe, 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 handler for Link Layer Discovery Protocol (LLDP) messages of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a crash on an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient validation of LLDP messages in the PROFINET LLDP message handler. An attacker could exploit this vulnerability by sending a malicious LLDP message to an affected device. A successful exploit could allow the attacker to cause the affected device to reload.

Weakness: CWE-400, CWE-388

Which versions are affected by CVE-2020-3512?

It affects 1 product.

Products include Cisco Ios Xe.

How do I fix CVE-2020-3512?

No fix has been published for CVE-2020-3512 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-2020-3512 being exploited?

There is no known exploitation of CVE-2020-3512 in the wild and no public exploit code.

All Cisco Ios Xe vulnerabilities

Sources

Also known as GHSA-wpq7-84wh-58gv.