SSA-620799

Siemens Security Advisory by Siemens ProductCERT

SSA-620799: Denial of Service Vulnerability During BLE Pairing in SENTRON Powercenter 1000/1100

Publication Date:	2024-12-10
Last Update:	2024-12-10
Current Version:	V1.0
CVSS v3.1 Base Score:	6.5
CVSS v4.0 Base Score:	7.1

SUMMARY

SENTRON Powercenter devices are affected by a denial of service vulnerability that can be triggered during BLE (Bluetooth Low Energy) pairing.

Siemens is preparing fix versions and recommends specific countermeasures for products where fixes are not, or not yet available.

AFFECTED PRODUCTS AND SOLUTION

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Affected Product and Versions	Remediation
SENTRON Powercenter 1000 (7KN1110-0MC00) All versions affected by CVE-2024-6657	Currently no fix is planned See recommendations from section Workarounds and Mitigations
SENTRON Powercenter 1100 (7KN1111-0MC00) All versions affected by CVE-2024-6657	Currently no fix is available 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:

CVE-2024-6657:

If BLE is needed: After any restart of the device or after turning on BLE via short button press, wait for more than three minutes to check the device's availability via Modbus TCP interface. If necessary, perform a restart by turning the power supply off and on again.

If BLE is not needed: After any restart, disable BLE by a short press on the button.

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

SENTRON Powercenter is a gateway that can be paired wirelessly with up to 24 circuit protection devices with measuring and communication functions.

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-2024-6657

A denial of service condition can only be triggered during BLE pairing. This occurs only in a limited time window of three minutes after any device restart, which requires physical access. A reset of the power supply is necessary to recover the device.

CVSS v3.1 Base Score	5.3
CVSS v3.1 Vector	CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0 Base Score	5.9
CVSS v4.0 Vector	CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CWE	CWE-821: Incorrect Synchronization

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 (2024-12-10):

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.