Rapid7 Vulnerability & Exploit Database

Cisco NX-OS: CVE-2021-1389: Cisco IOS XR and Cisco NX-OS Software IPv6 Access Control List Bypass Vulnerability

Free InsightVM Trial No Credit Card Necessary
Watch Demo See how it all works
Back to Search

Cisco NX-OS: CVE-2021-1389: Cisco IOS XR and Cisco NX-OS Software IPv6 Access Control List Bypass Vulnerability

Severity
6
CVSS
(AV:N/AC:L/Au:N/C:P/I:P/A:N)
Published
02/04/2021
Created
02/05/2021
Added
02/04/2021
Modified
09/22/2023

Description

A vulnerability in the IPv6 traffic processing of Cisco IOS XR Software and Cisco NX-OS Software for certain Cisco devices could allow an unauthenticated, remote attacker to bypass an IPv6 access control list (ACL) that is configured for an interface of an affected device. The vulnerability is due to improper processing of IPv6 traffic that is sent through an affected device. An attacker could exploit this vulnerability by sending crafted IPv6 packets that traverse the affected device. A successful exploit could allow the attacker to access resources that would typically be protected by the interface ACL.

Solution(s)

  • update-nxos

References

insightVM

Advanced vulnerability management analytics and reporting.
Key Features
Free InsightVM Trial View All Features

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;