CVE-2024-20480 Denial of service in Cisco IOS XE Software

High 8.6 Published 25 Sep 2024 Updated 25 Sep 2024

Remote attackers can cause high CPU utilization and denial of service on Cisco IOS XE SD-Access fabric edge nodes by sending malicious DHCP packets.

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-2024-20480?

CVE-2024-20480 is a high-severity denial of service vulnerability in Cisco Ios Xe, published on 25 Sep 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in the DHCP Snooping feature of Cisco IOS XE Software on Software-Defined Access (SD-Access) fabric edge nodes could allow an unauthenticated, remote attacker to cause high CPU utilization on an affected device, resulting in a denial of service (DoS) condition that requires a manual reload to recover. This vulnerability is due to improper handling of IPv4 DHCP packets. An attacker could exploit this vulnerability by sending certain IPv4 DHCP packets to an affected device. A successful exploit could allow the attacker to cause the device to exhaust CPU resources and stop processing traffic, resulting in a DoS condition that requires a manual reload to recover.

Weakness: CWE-670, CWE-783

Which versions are affected by CVE-2024-20480?

It affects 1 product.

Products include Cisco Ios Xe.

How do I fix CVE-2024-20480?

No fix has been published for CVE-2024-20480 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-2024-20480 being exploited?

There is no known exploitation of CVE-2024-20480 in the wild and no public exploit code.

All Cisco Ios Xe vulnerabilities

Sources

Also known as GHSA-2g8x-wxp8-jhpg.