SSA-844582

Siemens Security Advisory by Siemens ProductCERT

SSA-844582: Electromagnetic Fault Injection in LOGO! V8.3 BM Devices Results in Broken LOGO! V8.3 Product CA

Publication Date:	2023-12-12
Last Update:	2024-10-08
Current Version:	V1.2
CVSS v3.1 Base Score:	7.6

SUMMARY

LOGO! V8.3 BM (incl. SIPLUS variants) devices contain a vulnerability that could allow an electromagnetic fault injection. This could allow an attacker to dump and debug the firmware, including the manipulation of memory. Further actions could allow to inject public keys of custom created key pairs which are then signed by the LOGO! V8.3 Product CA.

The vulnerability is related to the specific hardware architecture of the LOGO! V8.3 BM. Siemens has released new hardware versions with the LOGO! V8.4 BM and the SIPLUS LOGO! V8.4 BM product families for all affected devices in which the vulnerability is fixed and the Product CA private key is rotated. See the chapter "Additional Information" below for more details.

For more information please also refer to the related product support article: https://support.industry.siemens.com/cs/ww/en/view/109826554/.

AFFECTED PRODUCTS AND SOLUTION

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Affected Product and Versions	Remediation
LOGO! V8.3 BM	Currently no fix is planned See recommendations from section Workarounds and Mitigations
LOGO! 12/24RCE (6ED1052-1MD08-0BA1) All versions >= V8.3 affected by CVE-2022-42784	Currently no fix is planned See recommendations from section Workarounds and Mitigations
LOGO! 12/24RCEo (6ED1052-2MD08-0BA1) All versions >= V8.3 affected by CVE-2022-42784	Currently no fix is planned See recommendations from section Workarounds and Mitigations
LOGO! 230RCE (6ED1052-1FB08-0BA1) All versions >= V8.3 affected by CVE-2022-42784	Currently no fix is planned See recommendations from section Workarounds and Mitigations
LOGO! 230RCEo (6ED1052-2FB08-0BA1) All versions >= V8.3 affected by CVE-2022-42784	Currently no fix is planned See recommendations from section Workarounds and Mitigations
LOGO! 24CE (6ED1052-1CC08-0BA1) All versions >= V8.3 affected by CVE-2022-42784	Currently no fix is planned See recommendations from section Workarounds and Mitigations
LOGO! 24CEo (6ED1052-2CC08-0BA1) All versions >= V8.3 affected by CVE-2022-42784	Currently no fix is planned See recommendations from section Workarounds and Mitigations
LOGO! 24RCE (6ED1052-1HB08-0BA1) All versions >= V8.3 affected by CVE-2022-42784	Currently no fix is planned See recommendations from section Workarounds and Mitigations
LOGO! 24RCEo (6ED1052-2HB08-0BA1) All versions >= V8.3 affected by CVE-2022-42784	Currently no fix is planned See recommendations from section Workarounds and Mitigations
SIPLUS LOGO! V8.3 BM	Currently no fix is planned See recommendations from section Workarounds and Mitigations
SIPLUS LOGO! 12/24RCE (6AG1052-1MD08-7BA1) All versions >= V8.3 affected by CVE-2022-42784	Currently no fix is planned See recommendations from section Workarounds and Mitigations
SIPLUS LOGO! 12/24RCEo (6AG1052-2MD08-7BA1) All versions >= V8.3 affected by CVE-2022-42784	Currently no fix is planned See recommendations from section Workarounds and Mitigations
SIPLUS LOGO! 230RCE (6AG1052-1FB08-7BA1) All versions >= V8.3 affected by CVE-2022-42784	Currently no fix is planned See recommendations from section Workarounds and Mitigations
SIPLUS LOGO! 230RCEo (6AG1052-2FB08-7BA1) All versions >= V8.3 affected by CVE-2022-42784	Currently no fix is planned See recommendations from section Workarounds and Mitigations
SIPLUS LOGO! 24CE (6AG1052-1CC08-7BA1) All versions >= V8.3 affected by CVE-2022-42784	Currently no fix is planned See recommendations from section Workarounds and Mitigations
SIPLUS LOGO! 24CEo (6AG1052-2CC08-7BA1) All versions >= V8.3 affected by CVE-2022-42784	Currently no fix is planned See recommendations from section Workarounds and Mitigations
SIPLUS LOGO! 24RCE (6AG1052-1HB08-7BA1) All versions >= V8.3 affected by CVE-2022-42784	Currently no fix is planned See recommendations from section Workarounds and Mitigations
SIPLUS LOGO! 24RCEo (6AG1052-2HB08-7BA1) All versions >= V8.3 affected by CVE-2022-42784	Currently no fix is planned See recommendations from section Workarounds and Mitigations

WORKAROUNDS AND MITIGATIONS

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

Use HTTPS communication only in trusted networks without unknown network devices
If possible, connect the Base Module directly with LOGO! Soft Comfort and the Web Browser

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

PRODUCT DESCRIPTION

Siemens LOGO! BM (Base Module) devices are used for basic small-scale automation tasks.

SIPLUS extreme products are designed for reliable operation under extreme conditions and are based on SIMATIC, LOGO!, SITOP, SINAMICS, SIMOTION, SCALANCE or other devices. SIPLUS devices use the same firmware as the product they are based on.

VULNERABILITY DESCRIPTION

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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-2022-42784

Affected devices are vulnerable to an electromagnetic fault injection. This could allow an attacker to dump and debug the firmware, including the manipulation of memory. Further actions could allow to inject public keys of custom created key pairs which are then signed by the product CA. The generation of a custom certificate allows communication with, and impersonation of, any device of the same version.

CVSS v3.1 Base Score	7.6
CVSS v3.1 Vector	CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C
CWE	CWE-1319: Improper Protection against Electromagnetic Fault Injection (EM-FI)

ACKNOWLEDGMENTS

Siemens thanks the following party for its efforts:

Sebastien Leger for reporting the vulnerability

ADDITIONAL INFORMATION

Siemens has released new hardware versions with the LOGO! V8.4 BM and the SIPLUS LOGO! V8.4 BM product families for all affected devices in which the vulnerability is fixed and the Product CA private key is rotated:

LOGO! 12/24RCE (6ED1052-1MD08-0BA2)
LOGO! 12/24RCEo (6ED1052-2MD08-0BA2)
LOGO! 230RCE (6ED1052-1FB08-0BA2)
LOGO! 230RCEo (6ED1052-2FB08-0BA2)
LOGO! 24CE (6ED1052-1CC08-0BA2)
LOGO! 24CEo (6ED1052-2CC08-0BA2)
LOGO! 24RCE (6ED1052-1HB08-0BA2)
LOGO! 24RCEo (6ED1052-2HB08-0BA2)
SIPLUS LOGO! 12/24RCE (6AG1052-1MD08-7BA2)
SIPLUS LOGO! 12/24RCEo (6AG1052-2MD08-7BA2)
SIPLUS LOGO! 230RCE (6AG1052-1FB08-7BA2)
SIPLUS LOGO! 230RCEo (6AG1052-2FB08-7BA2)
SIPLUS LOGO! 24CE (6AG1052-1CC08-7BA2)
SIPLUS LOGO! 24CEo (6AG1052-2CC08-7BA2)
SIPLUS LOGO! 24RCE (6AG1052-1HB08-7BA2)
SIPLUS LOGO! 24RCEo (6AG1052-2HB08-7BA2)

For more information please also refer to the related product support article: https://support.industry.siemens.com/cs/ww/en/view/109826554/.

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 (2023-12-12):	Publication Date
V1.1 (2024-09-10):	Added information about additional new SIPLUS LOGO! hardware versions: SIPLUS LOGO! 24CE and SIPLUS LOGO! 230RCE
V1.2 (2024-10-08):	Added information about additional new SIPLUS LOGO! hardware versions

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