CVE-2020-3230 Cisco IOS and IOS XE Software Internet Key Exchange Version 2 Denial of Service Vulnerability

High 7.5 Published 3 Jun 2020 Updated 15 Nov 2024

Remote attackers can cause denial of service in Cisco IOS devices by sending crafted IKEv2 packets, preventing new security associations.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2020-3230?

CVE-2020-3230 is a high-severity denial of service vulnerability in Cisco Ios, published on 3 Jun 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in the Internet Key Exchange Version 2 (IKEv2) implementation in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to prevent IKEv2 from establishing new security associations. The vulnerability is due to incorrect handling of crafted IKEv2 SA-Init packets. An attacker could exploit this vulnerability by sending crafted IKEv2 SA-Init packets to the affected device. An exploit could allow the attacker to cause the affected device to reach the maximum incoming negotiation limits and prevent further IKEv2 security associations from being formed.

Weakness: CWE-20

Which versions are affected by CVE-2020-3230?

It affects 2 products.

Products include Cisco Ios, Cisco Ios Xe.

How do I fix CVE-2020-3230?

No fix has been published for CVE-2020-3230 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-2020-3230 being exploited?

There is no known exploitation of CVE-2020-3230 in the wild and no public exploit code.

All Cisco Ios vulnerabilities

Sources

Also known as GHSA-wv34-jmmf-4486.