SSA-340240

Siemens Security Advisory by Siemens ProductCERT

SSA-340240: Denial of Service Vulnerability in Sentron Powercenter 1000 with 3RV2921-5M accessory

Publication Date:	2024-10-08
Last Update:	2024-10-08
Current Version:	V1.0
CVSS v3.1 Base Score:	8.6
CVSS v4.0 Base Score:	9.2

SUMMARY

A vulnerability in Sentron Powercenter 1000 with 3RV2921-5M accessory could allow an attacker to cause a denial of service condition.

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 with 3RV2921-5M accessory affected by CVE-2023-6874	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:

Mitigate through physical isolation

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

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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-2023-6874

Prior to v7.4.0, Ember ZNet is vulnerable to a denial of service attack through manipulation of the NWK sequence number

CVSS v3.1 Base Score	7.5
CVSS v3.1 Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE	CWE-754: Improper Check for Unusual or Exceptional Conditions

Product-Specific Vulnerability Description

For the following products, the impact of the vulnerability is different.

SENTRON Powercenter 1000 (7KN1110-0MC00):

The product is vulnerable through the manipulation of a component sequence number, other devices/networks are not affected, only the same powercenter/network is affected.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H (8.6)

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H (9.2)

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 (2024-10-08):

Publication Date

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