Westermo EDW-100 Insufficiently Protected Credentials (CVE-2024-36081)

critical Tenable OT Security Plugin ID 503050

Synopsis

The remote OT asset is affected by a vulnerability.

Description

Westermo EDW-100 allows an unauthenticated GET request that can download the configuration-file that contains the configuration, username, and passwords in clear-text.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

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

To mitigate the risks associated with these vulnerabilities, Westermo recommends:

Network segregation, perimeter protection, network to network protection, and physical security measures. EDW-100 functions as an industrial serial to ethernet converter. This means that EDW-100 does not in itself have any of the protective measures you require in a modern security posture, EDW-100 should not be placed at the edge of the network but instead deployed using the techniques mentioned in the IEC 62443 standard.

This means the use of network segregation and perimeter protection which can be accomplished by for example deploying a firewall and the use of VLANs.

If data needs to flow into, or out of, the security zone containing EDW-100 it is important to have network to network protection enabled which for example can be applied with a Virtual Private Network (VPN).

It is also crucial to have physical security measures put in place as the unit can be vulnerable to physical attacks and tampering. A recommendation to mitigate this risk is to place the unit in a separate enclosure with locks and alarms if it opened outside of normal maintenance.

While the unit's design characteristics may necessitate extra precautions, implementing the suggested countermeasures ensures a secure deployment that effectively addresses associated risks.

Westermo recommends replacing EDW-100 with Lynx DSS L105-S1.

Plugin Details

Severity: Critical

ID: 503050

Version: 1.1

Type: remote

Family: Tenable.ot

Published: 3/4/2025

Updated: 3/4/2025

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v3

Risk Factor: Critical

Base Score: 9.8

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

CVSS v4

Risk Factor: Critical

Base Score: 9.3

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/h:westernmo:edw_100_firmware

Required KB Items: Tenable.ot/Westermo

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 5/31/2025

Reference Information

CVE: CVE-2024-36081

CWE: 1286

ICSA: 24-151-04

Detections

Analytics