CVE-2021-1436 Cisco IOS XE SD-WAN Software Path Traversal Vulnerability

Medium 4.4 Published 24 Mar 2021 Updated 8 Nov 2024

An authenticated local attacker can exploit insufficient input validation in the CLI to perform path traversal and read arbitrary sensitive files.

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-2021-1436?

CVE-2021-1436 is a medium-severity path traversal 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

A vulnerability in the CLI of Cisco IOS XE SD-WAN Software could allow an authenticated, local attacker to conduct path traversal attacks and obtain read access to sensitive files on an affected system. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted request to an affected system. A successful exploit could allow the attacker to view arbitrary files on the affected system.

Weakness: CWE-22

Which versions are affected by CVE-2021-1436?

It affects 1 product.

Products include Cisco Ios Xe.

How do I fix CVE-2021-1436?

No fix has been published for CVE-2021-1436 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-2021-1436 being exploited?

There is no known exploitation of CVE-2021-1436 in the wild and no public exploit code.

All Cisco Ios Xe vulnerabilities

Sources

Also known as GHSA-j5j4-mgqf-g746.