CVE-2024-20456 Security feature bypass in Cisco IOS XR Software

Medium 6.7 Published 10 Jul 2024 Updated 1 Aug 2024

Authenticated local attackers with root privileges can bypass Secure Boot to load unverified software on Cisco IOS XR devices.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2024-20456?

CVE-2024-20456 is a medium-severity vulnerability in Cisco Ios Xr, published on 10 Jul 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability in the boot process of Cisco IOS XR Software could allow an authenticated, local attacker with high privileges to bypass the Cisco Secure Boot functionality and load unverified software on an affected device. To exploit this successfully, the attacker must have root-system privileges on the affected device. This vulnerability is due to an error in the software build process. An attacker could exploit this vulnerability by manipulating the system’s configuration options to bypass some of the integrity checks that are performed during the booting process. A successful exploit could allow the attacker to control the boot configuration, which could enable them to bypass of the requirement to run Cisco signed images or alter the security properties of the running system.

Weakness: CWE-732

Which versions are affected by CVE-2024-20456?

It affects 1 product.

Products include Cisco Ios Xr.

How do I fix CVE-2024-20456?

No fix has been published for CVE-2024-20456 yet. Limit exposure of the affected software until one is available.

Is CVE-2024-20456 being exploited?

There is no known exploitation of CVE-2024-20456 in the wild and no public exploit code.

All Cisco Ios Xr vulnerabilities

Sources

Also known as GHSA-32hx-c5c7-mvf8.