Cisco Nexus 9000 Series Fabric Switches ACI Mode Link Layer Discovery Protocol Port DoS (cisco-sa-apic-lldap-dos-WerV9CFj)

medium Nessus Plugin ID 151441

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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 is affected by a denial of service (DoS) vulnerability.
The vulnerability exists in the Link Layer Discovery Protocol (LLDP) due to incorrect processing of LLDP on packets on an SFP interface. An unauthenticated, adjacent attacker can exploit this issue, via sending a crafted LLDP packet, to cause the system to disable switching on the SFP interface.

Note that this vulnerability only affects systems in Application Centric Infrastructure (ACI) mode.

Please see the included Cisco BID and Cisco Security Advisory for more information.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvu84570

Plugin Details

Severity: Medium

ID: 151441

File Name: cisco-sa-apic-lldap-dos-WerV9CFj.nasl

Version: 1.5

Type: combined

Family: CISCO

Published: 7/7/2021

Updated: 7/8/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.6

CVSS v2

Risk Factor: Low

Base Score: 2.9

Temporal Score: 2.1

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

CVSS Score Source: CVE-2021-1231

CVSS v3

Risk Factor: Medium

Base Score: 4.7

Temporal Score: 4.1

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

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, Host/aci/system/chassis/summary

Exploit Ease: No known exploits are available

Patch Publication Date: 2/24/2021

Vulnerability Publication Date: 2/24/2021

Reference Information

CVE: CVE-2021-1231

CISCO-SA: cisco-sa-apic-lldap-dos-WerV9CFj

IAVA: 2021-A-0113

CISCO-BUG-ID: CSCvu84570

Detections

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