Cisco Nexus 9000 Series Fabric Switches Application Centric Infrastructure Mode Insecure Fabric Authentication (CVE-2019-1590)

high Tenable OT Security Plugin ID 501230

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A vulnerability in the Transport Layer Security (TLS) certificate validation functionality of Cisco Nexus 9000 Series Application Centric Infrastructure (ACI) Mode Switch Software could allow an unauthenticated, remote attacker to perform insecure TLS client authentication on an affected device. The vulnerability is due to insufficient TLS client certificate validations for certificates sent between the various components of an ACI fabric. An attacker who has possession of a certificate that is trusted by the Cisco Manufacturing CA and the corresponding private key could exploit this vulnerability by presenting a valid certificate while attempting to connect to the targeted device. An exploit could allow the attacker to gain full control of all other components within the ACI fabric of an affected device.

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Solution

Refer to the vendor advisory.

Plugin Details

Severity: High

ID: 501230

Version: 1.1

Type: remote

Family: Tenable.ot

Published: 7/25/2023

Updated: 7/26/2023

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2019-1590

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:cisco:nx-os:14.1%280.90%29, cpe:/o:cisco:nx-os:8.3%280%29sk%280.39%29

Required KB Items: Tenable.ot/Cisco

Exploit Ease: No known exploits are available

Patch Publication Date: 5/3/2019

Vulnerability Publication Date: 5/3/2019

Reference Information

CVE: CVE-2019-1590

CWE: 295

Detections

Analytics