CVE-2020-3418 Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family Improper Access Control Vulnerability

Medium 4.7 Published 24 Sep 2020 Updated 13 Nov 2024

An unauthenticated adjacent attacker can bypass access controls to send ICMPv6 traffic before client authentication completes on Cisco Catalyst 9800 routers.

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-2020-3418?

CVE-2020-3418 is a medium-severity missing authorization vulnerability in Cisco Ios Xe, published on 24 Sep 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability in Cisco IOS XE Wireless Controller Software for Cisco Catalyst 9800 Series Routers could allow an unauthenticated, adjacent attacker to send ICMPv6 traffic prior to the client being placed into RUN state. The vulnerability is due to an incomplete access control list (ACL) being applied prior to RUN state. An attacker could exploit this vulnerability by connecting to the associated service set identifier (SSID) and sending ICMPv6 traffic. A successful exploit could allow the attacker to send ICMPv6 traffic prior to RUN state.

Weakness: CWE-284

Which versions are affected by CVE-2020-3418?

It affects 1 product.

Products include Cisco Ios Xe.

How do I fix CVE-2020-3418?

No fix has been published for CVE-2020-3418 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2020-3418 being exploited?

There is no known exploitation of CVE-2020-3418 in the wild and no public exploit code.

All Cisco Ios Xe vulnerabilities

Sources

Also known as GHSA-9g2r-34xj-79x9.