ABB System 800xA Base Incorrect Permission Assignment For Critical Resource (CVE-2020-8474)

high Tenable OT Security Plugin ID 500948

Synopsis

The remote OT asset is affected by a vulnerability.

Description

Weak Registry permissions in ABB System 800xA Base allow low privileged users to read and modify registry settings related to control system functionality, allowing an authenticated attacker to cause system functions to stop or malfunction.

This plugin only works with Tenable.ot.
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Solution

The following text was originally created by the Cybersecurity and Infrastructure Security Agency (CISA). The original can be found at CISA.gov.

ABB recommends changing any user account passwords suspected to be known by an unauthorized person. Interactive logon (both local and remote) is recommended to be disabled for the service account.

This vulnerability is corrected in System 800xA Base 6.1

This vulnerability is planned to be corrected in the next release on the 6.0.3 LTS track after 6.0.3.3

Please note this vulnerability can only be exploited by authenticated users, so users are recommended to ensure only authorized persons have access to user accounts in System 800xA.

For more information please refer to ABB’s Cybersecurity Advisory.

Plugin Details

Severity: High

ID: 500948

Version: 1.4

Type: remote

Family: Tenable.ot

Published: 3/29/2023

Updated: 3/4/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

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

CVSS Score Source: CVE-2020-8474

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/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:/a:abb:800xa_base_system

Required KB Items: Tenable.ot/ABB

Exploit Ease: No known exploits are available

Patch Publication Date: 4/22/2020

Vulnerability Publication Date: 4/22/2020

Reference Information

CVE: CVE-2020-8474

CWE: 269

Detections

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