CVE-2021-1612 Cisco IOS XE SD-WAN Software Arbitrary File Overwrite Vulnerability

Medium 5.5 Published 23 Sep 2021 Updated 7 Nov 2024

An authenticated local attacker can overwrite arbitrary files on Cisco IOS XE SD-WAN devices via symbolic link manipulation.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-1612?

CVE-2021-1612 is a medium-severity path traversal 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 overwrite arbitrary files on the local system. This vulnerability is due to improper access controls on files within the local file system. An attacker could exploit this vulnerability by placing a symbolic link in a specific location on the local file system. A successful exploit could allow the attacker to overwrite arbitrary files on an affected device.

Weakness: CWE-59, CWE-61

Which versions are affected by CVE-2021-1612?

It affects 1 product.

Products include Cisco Sd-Wan.

How do I fix CVE-2021-1612?

No fix has been published for CVE-2021-1612 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-2021-1612 being exploited?

There is no known exploitation of CVE-2021-1612 in the wild and no public exploit code.

Sources

Also known as GHSA-hpj4-vj9f-q9hf.