CVE-2021-34746: cisco cisco enterprise nfv infrastructure software Authentication Bypass by Alternate Name

Vulnerability summary

CVE-2021-34746 is a critical (CVSS 9.8) Authentication Bypass by Alternate Name vulnerability in cisco cisco enterprise nfv infrastructure software. EPSS estimates a 17.66% chance of exploitation in the next 30 days, higher than 97.1% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 02-09-2021
   PublishedVulnerability first disclosed.
2. 07-11-2024
   Last modifiedVulnerability information updated.

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.

• CWE-289Authentication Bypass by Alternate NameThe product performs authentication based on the name of a resource being accessed, or the name of the actor performing the access, but it does not properly check all possible names for that resource or actor.
• CWE-287Improper AuthenticationWhen an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.