CVE-2022-20623

Cisco Nexus 9000 Series Switches Bidirectional Forwarding Detection Denial of Service Vulnerability

Description

A vulnerability in the rate limiter for Bidirectional Forwarding Detection (BFD) traffic of Cisco NX-OS Software for Cisco Nexus 9000 Series Switches could allow an unauthenticated, remote attacker to cause BFD traffic to be dropped on an affected device. This vulnerability is due to a logic error in the BFD rate limiter functionality. An attacker could exploit this vulnerability by sending a crafted stream of traffic through the device. A successful exploit could allow the attacker to cause BFD traffic to be dropped, resulting in BFD session flaps. BFD session flaps can cause route instability and dropped traffic, resulting in a denial of service (DoS) condition. This vulnerability applies to both IPv4 and IPv6 traffic.

Category

8.6
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 17.82% Top 10%
Vendor Advisory cisco.com
Affected: Cisco Cisco NX-OS Software
Published at:
Updated at:

References

Link Tags
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-bfd-dos-wGQXrzxn vendor advisory

Frequently Asked Questions

What is the severity of CVE-2022-20623?
CVE-2022-20623 has been scored as a high severity vulnerability.
How to fix CVE-2022-20623?
To fix CVE-2022-20623, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-20623 being actively exploited in the wild?
It is possible that CVE-2022-20623 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~18% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-20623?
CVE-2022-20623 affects Cisco Cisco NX-OS Software.
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