CVE-2020-3465 Cisco IOS XE Software Ethernet Frame Denial of Service Vulnerability

High 7.4 Published 24 Sep 2020 Updated 13 Nov 2024

An unauthenticated adjacent attacker can cause a Cisco IOS XE device to reload by sending specific Ethernet frames, resulting in 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-2020-3465?

CVE-2020-3465 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 Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a device to reload. The vulnerability is due to incorrect handling of certain valid, but not typical, Ethernet frames. An attacker could exploit this vulnerability by sending the Ethernet frames onto the Ethernet segment. A successful exploit could allow the attacker to cause the device to reload, resulting in a denial of service (DoS) condition.

Weakness: CWE-20

Which versions are affected by CVE-2020-3465?

It affects 1 product.

Products include Cisco Ios Xe.

How do I fix CVE-2020-3465?

No fix has been published for CVE-2020-3465 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-2020-3465 being exploited?

There is no known exploitation of CVE-2020-3465 in the wild and no public exploit code.

All Cisco Ios Xe vulnerabilities

Sources

Also known as GHSA-6wjw-6mqv-9jqj.