Detections
Analytics

Siemens SCALANCE X Switches Protection Mechanism Failure (CVE-2019-13924)

medium Tenable OT Security Plugin ID 501005

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A vulnerability has been identified in SCALANCE S602 (All versions < V4.1), SCALANCE S612 (All versions < V4.1), SCALANCE S623 (All versions < V4.1), SCALANCE S627-2M (All versions < V4.1), SCALANCE X-200 switch family (incl. SIPLUS NET variants) (All versions < 5.2.4), SCALANCE X-200IRT switch family (incl. SIPLUS NET variants) (All versions < V5.5.0), SCALANCE X-200RNA switch family (All versions < V3.2.7), SCALANCE X-300 switch family (incl. X408 and SIPLUS NET variants) (All versions < 4.1.3). The device does not send the X-Frame-Option Header in the administrative web interface, which makes it vulnerable to Clickjacking attacks. The security vulnerability could be exploited by an attacker that is able to trick an administrative user with a valid session on the target device into clicking on a website controlled by the attacker. The vulnerability could allow an attacker to perform administrative actions via the web interface.

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 released updates, which are recommended to be applied when possible:

- SCALANCE X-200 switch family (including SIPLUS NET variants): Version 5.2.4
- SCALANCE X-200IRT switch family (including SIPLUS NET variants): Version 5.5.0
- SCALANCE X-300 switch family (including X408 and SIRPLUS NET variants): Version 4.1.3
- SCALANCE S602: Update to 4.1 (Update is only available via Siemens Support contact)
- Upgrade hardware to successor product from SC-600 family and apply patches when available
- SCALANCE S612: Update to 4.1 (Update is only available via Siemens Support contact)
- Upgrade hardware to successor product from SC-600 family and apply patches when available
- SCALANCE S623: Update to 4.1 (Update is only available via Siemens Support contact)
- Upgrade hardware to successor product from SC-600 family and apply patches when available
- SCALANCE S627-2M: Update to 4.1 (Update is only available via Siemens Support contact)
- Upgrade hardware to successor product from SC-600 family and apply patches when available

- SCALANCE X-200RNA switch family: Update to v3.2.7 or later

Siemens has identified the following specific workarounds and mitigations users can apply to reduce the risk:

- Only access links from trusted sources in the browser you use to configure the SCALANCE X switches.

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 more information see Siemens security advisory SSA-951513

See Also

https://cert-portal.siemens.com/productcert/pdf/ssa-951513.pdf

https://www.us-cert.gov/ics/advisories/icsa-20-042-07

Plugin Details

Severity: Medium

ID: 501005

Version: 1.5

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: 2.5

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

CVSS Score Source: CVE-2019-13924

CVSS v3

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4.7

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

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

Vulnerability Information

CPE: cpe:/o:siemens:scalance_x-200irt_series_firmware, cpe:/o:siemens:scalance_x-200rna_series_firmware, cpe:/o:siemens:scalance_x-300_series_firmware, cpe:/o:siemens:scalance_xb-200_series_firmware, cpe:/o:siemens:scalance_xc-200_series_firmware, cpe:/o:siemens:scalance_xf-200_series_firmware, cpe:/o:siemens:scalance_xp-200_series_firmware, cpe:/o:siemens:scalance_xr-300_series_firmware, cpe:/o:siemens:scalance_xr-300wg_series_firmware, cpe:/o:siemens:scalance_x408_firmware, cpe:/o:siemens:scalance_s602_firmware, cpe:/o:siemens:scalance_s612_firmware, cpe:/o:siemens:scalance_s623_firmware, cpe:/o:siemens:scalance_s627-2m_firmware

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 2/11/2020

Vulnerability Publication Date: 2/11/2020

Reference Information

CVE: CVE-2019-13924

CWE: 693