Siemens SCALANCE X Storing Passwords in a Recoverable Format (CVE-2019-6567)

medium Tenable OT Security Plugin ID 500977

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A vulnerability has been identified in SCALANCE X-200 switch family (incl. SIPLUS NET variants) (All Versions < V5.2.4), SCALANCE X-200IRT switch family (incl. SIPLUS NET variants) (All versions < V5.5.0), SCALANCE X-300 switch family (incl. X408 and SIPLUS NET variants) (All versions < V4.1.3), SCALANCE X-414-3E (All versions). The affected devices store passwords in a recoverable format. An attacker may extract and recover device passwords from the device configuration.
Successful exploitation requires access to a device configuration backup and impacts confidentiality of the stored passwords.

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.

Siemens has identified the following specific workarounds/mitigations to reduce the risk from this vulnerability:

- SCALANCE X-200 switch family (including SIPLUS NET variants): Update to v5.2.4

- SCALANCE X-200IRT switch family (including SIPLUS NET variants): Update to v5.5.0 or later version

- SCALANCE X-300 switch family (including SIPLUS NET variants): Update to v4.1.3 or later version
- SCALANCE X-414-3E: Migrate to the SCALANCE XM-400 product line

Until additional updates are available, Siemens recommends users apply the following workarounds/mitigations to reduce the risk from this vulnerability:

- Restrict access to configuration backups or archived device configuration data.
- Restrict or disable network access to mechanisms that allow retrieval of device configuration, if enabled.
- Restrict access to device configuration module C-PLUG if in use.

As a general security measure, Siemens strongly recommends users protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends users configure the environment according to Siemens’ operational guidelines for Industrial Security, and follow the recommendations in the product manuals.

Additional information on industrial security by Siemens can be found at: https://www.siemens.com/industrialsecurity

For further inquiries on security vulnerabilities in Siemens products and solutions, please contact Siemens ProductCERT.

For more information on this vulnerability and more detailed mitigation instructions, please see Siemens Security Advisory SSA-646841

Plugin Details

Severity: Medium

ID: 500977

Version: 1.4

Type: remote

Family: Tenable.ot

Published: 4/11/2023

Updated: 3/4/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.6

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

CVSS Score Source: CVE-2019-6567

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

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

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

Vulnerability Information

CPE: cpe:/o:siemens:scalance_x-200_series_firmware, cpe:/o:siemens:scalance_x-200irt_series_firmware, cpe:/o:siemens:scalance_x-300_series_firmware, cpe:/o:siemens:scalance_x-414-3e_firmware

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 6/12/2019

Vulnerability Publication Date: 6/12/2019

Reference Information

CVE: CVE-2019-6567

CWE: 522

Detections

Analytics