CVE-2021-34746: Cisco Enterprise NFV Infrastructure Software Authentication Bypass Vulnerability
First published: Wed Sep 01 2021(Updated: )
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.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Enterprise NFV Infrastructure Software | <4.6.1 |
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Reference Links
Frequently Asked Questions
What is CVE-2021-34746?
CVE-2021-34746 is a vulnerability in the TACACS+ authentication, authorization, and accounting (AAA) feature of Cisco Enterprise NFV Infrastructure Software (NFVIS) that allows an unauthenticated, remote attacker to bypass authentication and log in to an affected device as an administrator.
How severe is CVE-2021-34746?
CVE-2021-34746 has a severity rating of 9.8 (critical).
What software is affected by CVE-2021-34746?
Cisco Enterprise NFV Infrastructure Software (NFVIS) versions up to and excluding 4.6.1 are affected by CVE-2021-34746.
What is the Common Weakness Enumeration (CWE) of CVE-2021-34746?
CVE-2021-34746 is associated with CWE-287 (Improper Authentication) and CWE-289 (Improper Verification of Cryptographic Signature).
Where can I find more information about CVE-2021-34746?
For more information about CVE-2021-34746, you can refer to the following references: - GitHub Advisory: [https://github.com/orangecertcc/security-research/security/advisories/GHSA-gqx8-c4xr-c664](https://github.com/orangecertcc/security-research/security/advisories/GHSA-gqx8-c4xr-c664) - Cisco Security Advisory: [https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nfvis-g2DMVVh](https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nfvis-g2DMVVh)
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