CVE-2019-1746 Cisco IOS and IOS XE Software Cluster Management Protocol Denial of Service Vulnerability

High 7.4 Published 27 Mar 2019 Updated 21 Nov 2024

An unauthenticated adjacent attacker can cause a denial of service on Cisco IOS devices by sending malicious Cluster Management 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-2019-1746?

CVE-2019-1746 is a high-severity denial of service vulnerability in Cisco Ios, published on 27 Mar 2019. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability in the Cluster Management Protocol (CMP) processing code in 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 insufficient input validation when processing CMP management packets. An attacker could exploit this vulnerability by sending malicious CMP management packets to an affected device. A successful exploit could cause the switch to crash, resulting in a DoS condition. The switch will reload automatically.

Weakness: CWE-20

Which versions are affected by CVE-2019-1746?

It affects 2 products.

Products include Cisco Ios, Cisco Ios Xe.

How do I fix CVE-2019-1746?

No fix has been published for CVE-2019-1746 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-2019-1746 being exploited?

There is no known exploitation of CVE-2019-1746 in the wild and no public exploit code.

All Cisco Ios vulnerabilities

Sources

Also known as GHSA-mmwf-5332-h99w.