Arista Networks EOS 802.1x authentication DoS (SA0038)

medium Nessus Plugin ID 133959

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Synopsis

The version of Arista Networks EOS running on the remote device is affected by a denial of service vulnerability.

Description

The version of Arista Networks EOS running on the remote device is affected by a denial of service (DoS) vulnerability in the 802.1x authentication feature, and by extension MACSec, when dynamic keys are used. An adjacent, unauthenticated attacker can exploit this, by sending a crafted packet from the data port, in order to crash the Dot1x agent and cause a DoS condition.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Arista Networks EOS version 4.21.2.3F / 4.21.1F / 4.20.9M / 4.19.10M / 4.18.10M or later. Alternatively, apply the patch referenced in the vendor advisory.

Plugin Details

Severity: Medium

ID: 133959

File Name: arista_eos_sa0038.nasl

Version: 1.4

Type: combined

Family: Misc.

Published: 2/25/2020

Updated: 2/27/2020

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Low

Base Score: 3.3

Temporal Score: 2.4

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

CVSS Score Source: CVE-2018-14008

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:A/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:arista:eos

Required KB Items: Settings/ParanoidReport, Host/Arista-EOS/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 9/13/2018

Vulnerability Publication Date: 9/13/2018

Reference Information

CVE: CVE-2018-14008

Detections

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