CVE-2020-3385 Cisco SD-WAN vEdge Routers Denial of Service Vulnerability

High 7.4 Published 16 Jul 2020 Updated 15 Nov 2024

An unauthenticated adjacent attacker can cause a denial of service on Cisco SD-WAN vEdge Routers by sending crafted packets to the DPI engine.

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-2020-3385?

CVE-2020-3385 is a high-severity denial of service vulnerability in Cisco SD-WAN vEdge router, published on 16 Jul 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 deep packet inspection (DPI) engine of Cisco SD-WAN vEdge Routers could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected system. The vulnerability is due to insufficient handling of malformed packets. An attacker could exploit this vulnerability by sending crafted packets through an affected device. A successful exploit could allow the attacker to cause the device to reboot, resulting in a DoS condition.

Weakness: CWE-371

Which versions are affected by CVE-2020-3385?

It affects 2 products.

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

How do I fix CVE-2020-3385?

No fix has been published for CVE-2020-3385 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-2020-3385 being exploited?

There is no known exploitation of CVE-2020-3385 in the wild and no public exploit code.

Sources

Also known as GHSA-5975-gjm3-px87.