CVE-2021-34724 Cisco IOS XE SD-WAN Software Privilege Escalation Vulnerability

Medium 6.0 Published 23 Sep 2021 Updated 7 Nov 2024

Authenticated local attackers can overwrite installer files to execute arbitrary code as root on Cisco IOS XE SD-WAN 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-2021-34724?

CVE-2021-34724 is a medium-severity vulnerability in Cisco IOS XE SD-WAN Software, 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 Cisco IOS XE SD-WAN Software CLI could allow an authenticated, local attacker to elevate privileges and execute arbitrary code on the underlying operating system as the root user. An attacker must be authenticated on an affected device as a PRIV15 user. This vulnerability is due to insufficient file system protection and the presence of a sensitive file in the bootflash directory on an affected device. An attacker could exploit this vulnerability by overwriting an installer file stored in the bootflash directory with arbitrary commands that can be executed with root-level privileges. A successful exploit could allow the attacker to read and write changes to the configuration database on the affected device.

Weakness: CWE-284

Which versions are affected by CVE-2021-34724?

It affects 1 product.

Products include Cisco Ios Xe Sd-Wan.

How do I fix CVE-2021-34724?

No fix has been published for CVE-2021-34724 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-34724 being exploited?

There is no known exploitation of CVE-2021-34724 in the wild and no public exploit code.

Sources

Also known as GHSA-3jmx-8q3h-p8gc.