Arista Networks EOS DoS (SA0039)

high Nessus Plugin ID 134116

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Synopsis

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

Description

The version of Arista Networks EOS running on the remote device is affected by a denial of service (DoS) vulnerability in the client certificate authentication process, due to the crypto/x509 package in Go not limiting the amount of work performed for each chain verification. A remote, unauthenticated attacker can exploit this, by sending a crafted certificate to cause the system to stop responding.

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 4.21.4F or later.

Plugin Details

Severity: High

ID: 134116

File Name: arista_eos_sa0039.nasl

Version: 1.4

Type: combined

Family: Misc.

Published: 2/28/2020

Updated: 3/6/2020

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2018-16875

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:arista:eos

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

Exploit Ease: No known exploits are available

Patch Publication Date: 2/26/2019

Vulnerability Publication Date: 1/16/2019

Reference Information

CVE: CVE-2018-16875

BID: 106230

Detections

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