Cisco Nexus 9000 Series Switches Bidirectional Forwarding Detection DoS (cisco-sa-nxos-bfd-dos-wGQXrzxn)

high Nessus Plugin ID 158887

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Synopsis

The remote device is missing a vendor-supplied security patch

Description

According to its self-reported version, Cisco NX-OS Software for Cisco Nexus 9000 Series Switches is affected by a denial of service vulnerability. The vulnerability exists in the rate limiter for Bidirectional Forwarding Detection (BFD) traffic of Cisco NX-OS Software for Cisco Nexus 9000 Series Switches. An unauthenticated, remote attacker can exploit this by sending a crafted stream of traffic through the device to cause BFD traffic to be dropped, resulting in BFD session flaps. This can cause route instability and dropped traffic and may result in a denial of service (DoS) condition. This vulnerability applies on both IPv4 and IPv6 traffic.

Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
Please see the included Cisco BIDs and Cisco Security Advisory for more information.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvx75912

Plugin Details

Severity: High

ID: 158887

File Name: cisco-sa-nxos-bfd-dos-wGQXrzxn.nasl

Version: 1.10

Type: combined

Family: CISCO

Published: 3/14/2022

Updated: 3/13/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.1

Temporal Score: 5.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2022-20623

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:cisco:nx-os

Required KB Items: Host/Cisco/NX-OS/Version, Host/Cisco/NX-OS/Model, Host/Cisco/NX-OS/Device

Exploit Ease: No known exploits are available

Patch Publication Date: 2/23/2022

Vulnerability Publication Date: 2/23/2022

Reference Information

CVE: CVE-2022-20623

CWE: 399

CISCO-SA: cisco-sa-nxos-bfd-dos-wGQXrzxn

IAVA: 2022-A-0095

CISCO-BUG-ID: CSCvx75912

Detections

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