CVE-2021-1434 Cisco IOS XE SD-WAN Software Arbitrary File Corruption Vulnerability

Medium 4.4 Published 24 Mar 2021 Updated 8 Nov 2024

An authenticated local attacker can overwrite arbitrary files on the underlying host file system via insufficient CLI parameter 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-2021-1434?

CVE-2021-1434 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 overwrite arbitrary files in the underlying file system. This vulnerability is due to insufficient validation of the parameters of a specific CLI command. An attacker could exploit this vulnerability by issuing that command with specific parameters. A successful exploit could allow the attacker to overwrite the content of any arbitrary file that resides on the underlying host file system.

Weakness: CWE-552

Which versions are affected by CVE-2021-1434?

It affects 1 product.

Products include Cisco Ios Xe.

How do I fix CVE-2021-1434?

No fix has been published for CVE-2021-1434 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-2021-1434 being exploited?

There is no known exploitation of CVE-2021-1434 in the wild and no public exploit code.

All Cisco Ios Xe vulnerabilities

Sources

Also known as GHSA-93v4-x3jr-8cfq.