Cisco NX-OS Software 802.1X Extensible Authentication Protocol over LAN Denial of Service Vulnerability

high Nessus Plugin ID 126599

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Synopsis

The remote device is missing a vendor-supplied security patch

Description

According to its self-reported version, a distributed denial of service (DDoS) vulnerability exists in the 802.1X implementation for Cisco NX-OS Software due to incomplete input validation of EAPOL frames. An unauthenticated, remote attacker can exploit this by sending a crafted EAPOL frame to an interface on the targeted device to cause system-level restart of the device and denial of service condition.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug IDs CSCvi93959, CSCvj22443, CSCvj22446, CSCvj22447, CSCvj22449

Plugin Details

Severity: High

ID: 126599

File Name: cisco-sa-20190306-nx-os-lan-auth.nasl

Version: 1.8

Type: combined

Family: CISCO

Published: 7/10/2019

Updated: 4/27/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 4.5

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

CVSS Score Source: CVE-2019-1594

CVSS v3

Risk Factor: High

Base Score: 7.4

Temporal Score: 6.4

Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/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_for_nexus_9000_series_fabric_switches_aci_mode

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: 3/6/2019

Vulnerability Publication Date: 3/6/2019

Reference Information

CVE: CVE-2019-1594

BID: 107325

CWE: 264

CISCO-SA: cisco-sa-20190306-nx-os-lan-auth

CISCO-BUG-ID: CSCvi93959, CSCvj22443, CSCvj22446, CSCvj22447, CSCvj22449

Detections

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