CVE-2019-12666 Cisco IOS XE Software Path Traversal Vulnerability

Medium 6.7 Published 25 Sep 2019 Updated 20 Nov 2024

An authenticated local attacker can exploit a path traversal flaw in the Guest Shell to execute arbitrary code on the underlying Linux OS.

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-2019-12666?

CVE-2019-12666 is a medium-severity path traversal vulnerability in Cisco Ios Xe, published on 25 Sep 2019. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability in the Guest Shell of Cisco IOS XE Software could allow an authenticated, local attacker to perform directory traversal on the base Linux operating system of Cisco IOS XE Software. The vulnerability is due to incomplete validation of certain commands. An attacker could exploit this vulnerability by first accessing the Guest Shell and then entering specific commands. A successful exploit could allow the attacker to execute arbitrary code on the base Linux operating system.

Weakness: CWE-22

Which versions are affected by CVE-2019-12666?

It affects 1 product.

Products include Cisco Ios Xe.

How do I fix CVE-2019-12666?

No fix has been published for CVE-2019-12666 yet. Limit exposure of the affected software until one is available.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2019-12666 being exploited?

There is no known exploitation of CVE-2019-12666 in the wild and no public exploit code.

All Cisco Ios Xe vulnerabilities

Sources

Also known as GHSA-2phx-jm8v-c5v7.