Publication Date:
Last Update:
Current Version: V1.0
CVSS v3.1 Base Score: 4.6
Affected Product and Versions Remediation

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  • Restrict physical access to affected devices to trusted personnel to avoid hardware tampering (e.g., place the devices in locked control cabinets)

Please follow the 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

The vulnerability classification has been performed by using the CVSS scoring system in version 3.1 (CVSS v3.1) (https://www.first.org/cvss/). The CVSS environmental score is specific to the customer’s environment and will impact the overall CVSS score. The environmental score should therefore be individually defined by the customer to accomplish final scoring.

An additional classification has been performed using the CWE classification, a community-developed list of common software security weaknesses. This serves as a common language and as a baseline for weakness identification, mitigation, and prevention efforts. A detailed list of CWE classes can be found at: https://cwe.mitre.org/.

CVSS v3.1 Base Score 4.6
CVSS Vector CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:P/RL:T/RC:C
CWE CWE-1326: Missing Immutable Root of Trust in Hardware

  • Yuanzhe Wu and Ang Cui from Red Balloon Security for coordinated disclosure

Siemens has released the following new hardware versions of the S7-1500 product family. They contain a new secure boot mechanism that resolves the vulnerability:

  • SIMATIC S7-1500 CPU 1511-1 PN (6ES7511-1AL03-0AB0)
  • SIMATIC S7-1500 CPU 1513-1 PN (6ES7513-1AM03-0AB0)
  • SIMATIC S7-1500 CPU 1511F-1 PN (6ES7511-1FL03-0AB0)
  • SIMATIC S7-1500 CPU 1513F-1 PN (6ES7513-1FM03-0AB0)
  • SIMATIC S7-1500 CPU 1513R-1 PN (6ES7513-1RM03-0AB0)
  • SIMATIC S7-1500 CPU 1515R-2 PN (6ES7515-2RN03-0AB0)

Siemens is working on new hardware versions for additional PLC types to address this vulnerability further.

https://www.siemens.com/cert/advisories

V1.0 (2023-01-10): Publication Date