CVE-2018-0157 Denial of service in Cisco IOS XE

High 8.6 Published 28 Mar 2018 Updated 2 Dec 2024

Remote unauthenticated attackers can crash Cisco IOS XE devices by sending fragmented IP packets, causing a denial of service.

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-2018-0157?

CVE-2018-0157 is a high-severity denial of service vulnerability in Cisco Ios Xe, published on 28 Mar 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in the Zone-Based Firewall code of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a device to reload. The vulnerability is due to the way fragmented packets are handled in the firewall code. An attacker could exploit this vulnerability by sending fragmented IP Version 4 or IP Version 6 packets through an affected device. An exploit could allow the attacker to cause the device to crash, resulting in a denial of service (DoS) condition. The following releases of Cisco IOS XE Software are vulnerable: Everest-16.4.1, Everest-16.4.2, Everest-16.5.1, Everest-16.5.1b, Everest-16.6.1, Everest-16.6.1a. Cisco Bug IDs: CSCvf60296.

Weakness: CWE-19

Which versions are affected by CVE-2018-0157?

It affects 1 product.

Products include Cisco Ios Xe.

How do I fix CVE-2018-0157?

No fix has been published for CVE-2018-0157 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-2018-0157 being exploited?

There is no known exploitation of CVE-2018-0157 in the wild and no public exploit code.

All Cisco Ios Xe vulnerabilities

Sources

Also known as GHSA-62mx-f8g8-6q8g.