CVE-2021-1376 Cisco IOS XE Software Fast Reload Vulnerabilities

Medium 6.7 Published 24 Mar 2021 Updated 8 Nov 2024

Authenticated local attackers can bypass secure boot checks to execute arbitrary code or unsigned binaries on Cisco Catalyst switches.

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-2021-1376?

CVE-2021-1376 is a medium-severity vulnerability in Cisco Ios Xe, published on 24 Mar 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Multiple vulnerabilities in the fast reload feature of Cisco IOS XE Software running on Cisco Catalyst 3850, Cisco Catalyst 9300, and Cisco Catalyst 9300L Series Switches could allow an authenticated, local attacker to either execute arbitrary code on the underlying operating system, install and boot a malicious software image, or execute unsigned binaries on an affected device. These vulnerabilities are due to improper checks performed by system boot routines. To exploit these vulnerabilities, the attacker would need privileged access to the CLI of the device. A successful exploit could allow the attacker to either execute arbitrary code on the underlying operating system or execute unsigned code and bypass the image verification check part of the secure boot process. For more information about these vulnerabilities, see the Details section of this advisory.

Weakness: CWE-347

Which versions are affected by CVE-2021-1376?

It affects 1 product.

Products include Cisco Ios Xe.

How do I fix CVE-2021-1376?

No fix has been published for CVE-2021-1376 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-1376 being exploited?

There is no known exploitation of CVE-2021-1376 in the wild and no public exploit code.

All Cisco Ios Xe vulnerabilities

Sources

Also known as GHSA-pjh3-48qc-pm5c.