CVE-2021-34729 Cisco IOS XE SD-WAN Software Command Injection Vulnerability

Medium 6.7 Published 23 Sep 2021 Updated 7 Nov 2024

Authenticated local attackers can execute arbitrary commands with elevated privileges on Cisco IOS XE SD-WAN devices via insufficient CLI argument validation.

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-2021-34729?

CVE-2021-34729 is a medium-severity command injection vulnerability in Cisco Ios Xe, published on 23 Sep 2021. 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 SD-WAN Software and Cisco IOS XE Software could allow an authenticated, local attacker to execute arbitrary commands with elevated privileges on an affected device. This vulnerability is due to insufficient validation of arguments passed to certain CLI commands. An attacker could exploit this vulnerability by including malicious input in the argument of an affected command. A successful exploit could allow the attacker to execute arbitrary commands with elevated privileges on the underlying operating system. An attacker would need valid user credentials to exploit this vulnerability.

Weakness: CWE-78, CWE-77

Which versions are affected by CVE-2021-34729?

It affects 2 products.

Products include Cisco Ios Xe, Cisco Ios Xe Sd-Wan.

How do I fix CVE-2021-34729?

No fix has been published for CVE-2021-34729 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-2021-34729 being exploited?

There is no known exploitation of CVE-2021-34729 in the wild and no public exploit code.

All Cisco Ios Xe vulnerabilities

Sources

Also known as GHSA-qm8p-89vx-j9q3.