CVE-2021-34746 Cisco Enterprise NFV Infrastructure Software Authentication Bypass Vulnerability

Critical 9.8 Published 2 Sep 2021 Updated 7 Nov 2024

Unauthenticated remote attackers can bypass authentication to log in as administrator on Cisco NFVIS devices due to input validation flaws.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-34746?

CVE-2021-34746 is a critical authentication bypass vulnerability in Cisco Enterprise NFV Infrastructure Software, published on 2 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in the TACACS+ authentication, authorization and accounting (AAA) feature of Cisco Enterprise NFV Infrastructure Software (NFVIS) could allow an unauthenticated, remote attacker to bypass authentication and log in to an affected device as an administrator. This vulnerability is due to incomplete validation of user-supplied input that is passed to an authentication script. An attacker could exploit this vulnerability by injecting parameters into an authentication request. A successful exploit could allow the attacker to bypass authentication and log in as an administrator to the affected device.

Weakness: CWE-287, CWE-289

Which versions are affected by CVE-2021-34746?

It affects 1 product.

Products include Cisco Enterprise Nfv Infrastructure Software.

How do I fix CVE-2021-34746?

No fix has been published for CVE-2021-34746 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2021-34746 being exploited?

There is no known exploitation of CVE-2021-34746 in the wild and no public exploit code.

Sources

Also known as GHSA-hjrv-6xv3-c6x3.