CVE-2020-3403 Cisco IOS XE Software Command Injection Vulnerability

Medium 6.7 Published 24 Sep 2020 Updated 13 Nov 2024

An authenticated local attacker with privileged EXEC permissions can inject commands to execute with root privileges upon device reboot.

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-2020-3403?

CVE-2020-3403 is a medium-severity command injection vulnerability in Cisco Ios Xe, published on 24 Sep 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability in the CLI of Cisco IOS XE Software could allow an authenticated, local attacker to inject a command to the underlying operating system that will execute with root privileges upon the next reboot of the device. The authenticated user must have privileged EXEC permissions on the device. The vulnerability is due to insufficient protection of values passed to a script that executes during device startup. An attacker could exploit this vulnerability by writing values to a specific file. A successful exploit could allow the attacker to execute commands with root privileges each time the affected device is restarted.

Weakness: CWE-78

Which versions are affected by CVE-2020-3403?

It affects 1 product.

Products include Cisco Ios Xe.

How do I fix CVE-2020-3403?

No fix has been published for CVE-2020-3403 yet. Limit exposure of the affected software until one is available.

Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.

Is CVE-2020-3403 being exploited?

There is no known exploitation of CVE-2020-3403 in the wild and no public exploit code.

All Cisco Ios Xe vulnerabilities

Sources

Also known as GHSA-jwvq-qvwv-pjcm.