CVE-2018-15373 Cisco IOS and IOS XE Software Cisco Discovery Protocol Denial of Service Vulnerability

High 7.4 Published 5 Oct 2018 Updated 26 Nov 2024

An unauthenticated adjacent attacker can cause a denial of service by exhausting memory through high-rate Cisco Discovery Protocol packets.

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-2018-15373?

CVE-2018-15373 is a high-severity denial of service vulnerability in Cisco Ios, published on 5 Oct 2018. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability in the implementation of Cisco Discovery Protocol functionality in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to exhaust memory on an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to improper memory handling by the affected software when the software processes high rates of Cisco Discovery Protocol packets that are sent to a device. An attacker could exploit this vulnerability by sending a high rate of Cisco Discovery Protocol packets to an affected device. A successful exploit could allow the attacker to exhaust memory on the affected device, resulting in a DoS condition.

Weakness: CWE-770, CWE-399

Which versions are affected by CVE-2018-15373?

It affects 2 products.

Products include Cisco Ios, Cisco Ios Xe.

How do I fix CVE-2018-15373?

No fix has been published for CVE-2018-15373 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-2018-15373 being exploited?

There is no known exploitation of CVE-2018-15373 in the wild and no public exploit code.

All Cisco Ios vulnerabilities

Sources

Also known as GHSA-jwv5-rv9v-wpxj.