CVE-2018-0471 Cisco IOS XE Software Cisco Discovery Protocol Memory Leak Vulnerability

High 7.4 Published 5 Oct 2018 Updated 26 Nov 2024

An unauthenticated adjacent attacker can cause a memory leak and device crash by sending malicious CDP packets to Cisco IOS XE devices.

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-2018-0471?

CVE-2018-0471 is a high-severity denial of service vulnerability in Cisco Ios Xe, 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 Cisco Discovery Protocol (CDP) module of Cisco IOS XE Software Releases 16.6.1 and 16.6.2 could allow an unauthenticated, adjacent attacker to cause a memory leak that may lead to a denial of service (DoS) condition. The vulnerability is due to incorrect processing of certain CDP packets. An attacker could exploit this vulnerability by sending certain CDP packets to an affected device. A successful exploit could cause an affected device to continuously consume memory and eventually result in a memory allocation failure that leads to a crash, triggering a reload of the affected device.

Weakness: CWE-772, CWE-400

Which versions are affected by CVE-2018-0471?

It affects 1 product.

Products include Cisco Ios Xe.

How do I fix CVE-2018-0471?

No fix has been published for CVE-2018-0471 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-2018-0471 being exploited?

There is no known exploitation of CVE-2018-0471 in the wild and no public exploit code.

All Cisco Ios Xe vulnerabilities

Sources

Also known as GHSA-5234-wvr8-wqqh.