CVE-2020-3351 Cisco SD-WAN Solution Software Denial of Service Vulnerability

High 8.6 Published 16 Jul 2020 Updated 15 Nov 2024

Unauthenticated remote attackers can cause a denial of service by sending crafted UDP messages to Cisco SD-WAN devices.

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-2020-3351?

CVE-2020-3351 is a high-severity denial of service vulnerability in Cisco SD-WAN Solution, published on 16 Jul 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in Cisco SD-WAN Solution Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to improper validation of fields in Cisco SD-WAN peering messages that are encapsulated in UDP packets. An attacker could exploit this vulnerability by sending crafted UDP messages to the targeted system. A successful exploit could allow the attacker to cause services on the device to fail, resulting in a DoS condition that could impact the targeted device and other devices that depend on it.

Weakness: CWE-400, CWE-399

Which versions are affected by CVE-2020-3351?

It affects 3 products.

Products include Cisco Sd-Wan Firmware, Cisco Vedge Cloud Router, Cisco Vsmart Controller.

How do I fix CVE-2020-3351?

No fix has been published for CVE-2020-3351 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-2020-3351 being exploited?

There is no known exploitation of CVE-2020-3351 in the wild and no public exploit code.

Sources

Also known as GHSA-6j89-cjff-693q.