SSA-787280

Siemens Security Advisory by Siemens ProductCERT

SSA-787280: Unlocked Bootloader Vulnerability in SINAMICS S200

Publication Date:	2025-03-11
Last Update:	2025-03-11
Current Version:	V1.0
CVSS v3.1 Base Score:	9.8
CVSS v4.0 Base Score:	9.5

SUMMARY

A specific range of produced SINAMICS S200 devices contains an unlocked bootloader vulnerability that could allow an attacker to download untrusted firmware that could damage or compromise the device.

For delivered products listed below Siemens recommends countermeasures.

AFFECTED PRODUCTS AND SOLUTION

Un-/Collapse All

Affected Product and Versions	Remediation
SINAMICS S200 All versions with serial number beginning with SZVS8, SZVS9, SZVS0 or SZVSN and the FS number is 02 affected by CVE-2024-56336	Follow the general security recomendations and apply defense in depth Contact your local customer service for further support

WORKAROUNDS AND MITIGATIONS

Product-specific remediations or mitigations can be found in the section Affected Products and Solution.
Please follow the General Security Recommendations.

GENERAL SECURITY RECOMMENDATIONS

As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens' operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals. Additional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity

VULNERABILITY DESCRIPTION

Un-/Collapse All

This chapter describes all vulnerabilities (CVE-IDs) addressed in this security advisory. Wherever applicable, it also documents the product-specific impact of the individual vulnerabilities.

Vulnerability CVE-2024-56336

The affected device contains an unlocked bootloader. This security oversight enables attackers to inject malicious code, or install untrusted firmware. The intrinsic security features designed to protect against data manipulation and unauthorized access are compromised when the bootloader is not secured.

CVSS v3.1 Base Score	9.8
CVSS v3.1 Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0 Base Score	9.5
CVSS v4.0 Vector	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CWE	CWE-287: Improper Authentication

ADDITIONAL INFORMATION

For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories

HISTORY DATA

V1.0 (2025-03-11):

Publication Date

The use of Siemens Security Advisories is subject to the terms and conditions listed on: https://www.siemens.com/productcert/terms-of-use.