Rockwell Automation CompactLogix 5370 and ControlLogix 5570 Controllers Improper Limitation of a Pathname to a Restricted Directory (CVE-2020-6998)

high Tenable OT Security Plugin ID 500694

Synopsis

The remote OT asset is affected by a vulnerability.

Description

The connection establishment algorithm found in Rockwell Automation CompactLogix 5370 and ControlLogix 5570 versions 33 and prior does not sufficiently manage its control flow during execution, creating an infinite loop. This may allow an attacker to send specially crafted CIP packet requests to a controller, which may cause denial-of-service conditions in communications with other products.

- The connection establishment algorithm found in Rockwell Automation CompactLogix 5370 and ControlLogix 5570 versions 33 and prior does not sufficiently manage its control flow during execution, creating an infinite loop. This may allow an attacker to send specially crafted CIP packet requests to a controller, which may cause denial-of-service conditions in communications with other products. (CVE-2020-6998)

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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.

Rockwell Automation recommends affected users apply firmware v33.011 or later.

For more information see the Rockwell Automation advisory (login required).

Plugin Details

Severity: High

ID: 500694

Version: 1.10

Type: remote

Family: Tenable.ot

Published: 8/4/2022

Updated: 9/4/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

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-2020-6998

CVSS v3

Risk Factor: High

Base Score: 8.6

Temporal Score: 7.5

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

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

Vulnerability Information

CPE: cpe:/o:rockwellautomation:guardlogix_5560_firmware, cpe:/o:rockwellautomation:compactlogix_5370_l1_firmware, cpe:/o:rockwellautomation:compactlogix_5370_l2_firmware, cpe:/o:rockwellautomation:compactlogix_5370_l3_firmware, cpe:/o:rockwellautomation:compact_guardlogix_5370_firmware, cpe:/o:rockwellautomation:armor_compact_guardlogix_5370_firmware, cpe:/o:rockwellautomation:guardlogix_5570_firmware, cpe:/o:rockwellautomation:guardlogix_5580_firmware, cpe:/o:rockwellautomation:controllogix_5570_firmware

Required KB Items: Tenable.ot/Rockwell

Exploit Ease: No known exploits are available

Patch Publication Date: 7/27/2022

Vulnerability Publication Date: 7/27/2022

Reference Information

CVE: CVE-2020-6998

CWE: 20

ICSA: 21-061-02

Detections

Analytics