-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 # SSA-173565: Denial-of-Service Vulnerability in RUGGEDCOM ROX Devices Publication Date: 2021-10-12 Last Update: 2021-10-12 Current Version: 1.0 CVSS v3.1 Base Score: 7.5 SUMMARY ======= The latest update for RUGGEDCOM ROX devices fixes a vulnerability that could allow an unauthenticated attacker to cause a permanent Denial-of-Service condition under certain conditions. Siemens has released updates for the affected products and recommends to update to the latest versions. AFFECTED PRODUCTS AND SOLUTION ============================== * RUGGEDCOM ROX MX5000 - Affected versions: All versions < V2.14.1 - Remediation: Update to V2.14.1 or later version - Download: https://support.industry.siemens.com/cs/ww/en/view/109800780/ * RUGGEDCOM ROX RX1400 - Affected versions: All versions < V2.14.1 - Remediation: Update to V2.14.1 or later version - Download: https://support.industry.siemens.com/cs/ww/en/view/109800780/ * RUGGEDCOM ROX RX1500 - Affected versions: All versions < V2.14.1 - Remediation: Update to V2.14.1 or later version - Download: https://support.industry.siemens.com/cs/ww/en/view/109800780/ * RUGGEDCOM ROX RX1501 - Affected versions: All versions < V2.14.1 - Remediation: Update to V2.14.1 or later version - Download: https://support.industry.siemens.com/cs/ww/en/view/109800780/ * RUGGEDCOM ROX RX1510 - Affected versions: All versions < V2.14.1 - Remediation: Update to V2.14.1 or later version - Download: https://support.industry.siemens.com/cs/ww/en/view/109800780/ * RUGGEDCOM ROX RX1511 - Affected versions: All versions < V2.14.1 - Remediation: Update to V2.14.1 or later version - Download: https://support.industry.siemens.com/cs/ww/en/view/109800780/ * RUGGEDCOM ROX RX1512 - Affected versions: All versions < V2.14.1 - Remediation: Update to V2.14.1 or later version - Download: https://support.industry.siemens.com/cs/ww/en/view/109800780/ * RUGGEDCOM ROX RX1524 - Affected versions: All versions < V2.14.1 - Remediation: Update to V2.14.1 or later version - Download: https://support.industry.siemens.com/cs/ww/en/view/109800780/ * RUGGEDCOM ROX RX1536 - Affected versions: All versions < V2.14.1 - Remediation: Update to V2.14.1 or later version - Download: https://support.industry.siemens.com/cs/ww/en/view/109800780/ * RUGGEDCOM ROX RX5000 - Affected versions: All versions < V2.14.1 - Remediation: Update to V2.14.1 or later version - Download: https://support.industry.siemens.com/cs/ww/en/view/109800780/ WORKAROUNDS AND MITIGATIONS =========================== Siemens has identified the following specific workarounds and mitigations that customers can apply to reduce the risk: * Restrict access to the affected systems, especially to port 443/tcp, to trusted IP addresses only 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 =================== ROX-based VPN endpoints and firewall devices are used to connect devices that operate in harsh environments such as electric utility substations and traffic control cabinets. VULNERABILITY CLASSIFICATION ============================ 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/. * Vulnerability CVE-2021-41546 Affected devices write crashdumps without checking if enough space is available on the filesystem. Once the crashdump fills the entire root filesystem, affected devices fail to boot successfully. An attacker can leverage this vulnerability to cause a permanent Denial-of-Service. CVSS v3.1 Base Score: 7.5 CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C CWE: CWE-400: Uncontrolled Resource Consumption ACKNOWLEDGMENTS =============== Siemens thanks the following parties for their efforts: * Communications Security Establishment, CSE for coordinated disclosure * Loudmouth Security Inc. for coordinated disclosure 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 (2021-10-12): Publication Date TERMS OF USE ============ Siemens Security Advisories are subject to the terms and conditions contained in Siemens' underlying license terms or other applicable agreements previously agreed to with Siemens (hereinafter "License Terms"). To the extent applicable to information, software or documentation made available in or through a Siemens Security Advisory, the Terms of Use of Siemens' Global Website (https://www.siemens.com/terms_of_use, hereinafter "Terms of Use"), in particular Sections 8-10 of the Terms of Use, shall apply additionally. 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