Arista Networks EOS ASN.1 Encoder RCE (SA0020)

Critical Nessus Plugin ID 107062

Synopsis

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

Description

The version of Arista Networks EOS running on the remote device is affected by a remote code execution vulnerability in the ASN.1 encoder due to an underflow condition that occurs when attempting to encode the value zero represented as a negative integer. An unauthenticated, remote attacker can exploit this to corrupt memory, resulting in the execution of arbitrary code.

Solution

Contact the vendor for a fixed version, or apply the patch file referenced in the vendor advisory.

See Also

http://www.nessus.org/u?cdf5a8ee

Plugin Details

Severity: Critical

ID: 107062

File Name: arista_eos_sa0020.nasl

Version: 1.4

Type: combined

Family: Misc.

Published: 2018/02/28

Modified: 2018/08/09

Dependencies: 107070

Risk Information

Risk Factor: Critical

CVSS v2.0

Base Score: 10

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

CVSS v3.0

Base Score: 9.8

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

Vulnerability Information

CPE: cpe:/o:arista:eos

Required KB Items: Host/Arista-EOS/Version, Host/Arista-EOS/eos_shell

Patch Publication Date: 2016/05/20

Vulnerability Publication Date: 2016/05/03

Reference Information

CVE: CVE-2016-2108

BID: 89752