CVE-2018-0475 Cisco IOS and IOS XE Software Cluster Management 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 on Cisco IOS devices by sending malicious Cluster Management Protocol messages.

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-2018-0475?

CVE-2018-0475 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 the cluster feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to trigger a denial of service (DoS) condition on an affected device. The vulnerability is due to improper input validation when handling Cluster Management Protocol (CMP) messages. An attacker could exploit this vulnerability by sending a malicious CMP message to an affected device. A successful exploit could allow the attacker to cause the switch to crash and reload or to hang, resulting in a DoS condition. If the switch hangs it will not reboot automatically, and it will need to be power cycled manually to recover.

Weakness: CWE-20

Which versions are affected by CVE-2018-0475?

It affects 2 products.

Products include Cisco Ios, Cisco Ios Xe.

How do I fix CVE-2018-0475?

No fix has been published for CVE-2018-0475 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-2018-0475 being exploited?

There is no known exploitation of CVE-2018-0475 in the wild and no public exploit code.

All Cisco Ios vulnerabilities

Sources

Also known as GHSA-wr6p-fg29-rg69.