CVE-2020-3369 Cisco SD-WAN vEdge Routers Denial of Service Vulnerability

High 8.6 Published 16 Jul 2020 Updated 15 Nov 2024

Unauthenticated remote attackers can cause continuous reboots in Cisco SD-WAN vEdge routers by sending crafted FTP packets, resulting in a denial of service.

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-2020-3369?

CVE-2020-3369 is a high-severity denial of service vulnerability in Cisco SD-WAN vEdge router, 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 the deep packet inspection (DPI) engine of Cisco SD-WAN vEdge Routers could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper processing of FTP traffic. An attacker could exploit this vulnerability by sending crafted FTP packets through an affected device. A successful exploit could allow the attacker to make the device reboot continuously, causing a DoS condition.

Weakness: CWE-118

Which versions are affected by CVE-2020-3369?

It affects 2 products.

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

How do I fix CVE-2020-3369?

No fix has been published for CVE-2020-3369 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-2020-3369 being exploited?

There is no known exploitation of CVE-2020-3369 in the wild and no public exploit code.

Sources

Also known as GHSA-f3ch-8xx9-vh6w.