Rapid7 Vulnerability & Exploit Database

Cisco NX-OS: CVE-2021-1387: Cisco NX-OS Software IPv6 Netstack Denial of Service Vulnerability

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

Cisco NX-OS: CVE-2021-1387: Cisco NX-OS Software IPv6 Netstack Denial of Service Vulnerability

Severity
4
CVSS
(AV:N/AC:M/Au:N/C:N/I:N/A:P)
Published
02/25/2021
Created
02/26/2021
Added
02/25/2021
Modified
04/08/2024

Description

A vulnerability in the network stack of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability exists because the software improperly releases resources when it processes certain IPv6 packets that are destined to an affected device. An attacker could exploit this vulnerability by sending multiple crafted IPv6 packets to an affected device. A successful exploit could cause the network stack to run out of available buffers, impairing operations of control plane and management plane protocols and resulting in a DoS condition. Manual intervention would be required to restore normal operations on the affected device. For more information about the impact of this vulnerability, see the Details section of this advisory.

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

;