Arista Networks EOS DNS 2 byte heap based overflow RCE (SA0030)

critical Nessus Plugin ID 133801
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The version of Arista Networks EOS running on the remote device is affected by a remote code execution vulnerability.


The version of Arista Networks EOS running on the remote device is affected by a heap-based buffer overflow in dnsmasq.
This vulnerability allows a remote, unauthenticated attacker to run arbitrary code, create a denial of service (DoS) or an out of memory situation.

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


Upgrade to Arista Networks EOS version 4.19.0F / 4.17.8M / 4.16.13M or later. Alternatively, apply the patch or recommended mitigation referenced in the vendor advisory.

See Also

Plugin Details

Severity: Critical

ID: 133801

File Name: arista_eos_sa0030.nasl

Version: 1.4

Type: combined

Family: Misc.

Published: 2/19/2020

Updated: 2/20/2020

Dependencies: arista_eos_detect.nbin

Configuration: Enable paranoid mode

Risk Information

CVSS Score Source: CVE-2017-14491


Risk Factor: High

Score: 8.4


Risk Factor: High

Base Score: 7.5

Temporal Score: 6.2

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

Temporal Vector: E:F/RL:OF/RC:C


Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9.1

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

Temporal Vector: E:F/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:arista:eos

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/2/2017

Vulnerability Publication Date: 10/3/2017

Exploitable With

Core Impact

Reference Information

CVE: CVE-2017-14491

BID: 101085