SSA-150692

Siemens Security Advisory by Siemens ProductCERT

SSA-150692: Multiple Vulnerabilities in RUGGEDCOM ROX

Publication Date:	2021-09-14
Last Update:	2021-10-12
Current Version:	V1.1
CVSS v3.1 Base Score:	8.8

SUMMARY

Multiple vulnerabilities in RUGGEDCOM ROX devices have been detected, ranging from command injection to filesystem traversal. An attacker could exploit these to gain root access to the affected devices.

Siemens has released updates for the affected products and recommends to update to the latest versions.

AFFECTED PRODUCTS AND SOLUTION

Affected Product and Versions	Remediation
RUGGEDCOM ROX MX5000: All versions < V2.14.1	Update to V2.14.1 or later version https://support.industry.siemens.com/cs/ww/en/view/109800780/
RUGGEDCOM ROX RX1400: All versions < V2.14.1	Update to V2.14.1 or later version https://support.industry.siemens.com/cs/ww/en/view/109800780/
RUGGEDCOM ROX RX1500: All versions < V2.14.1	Update to V2.14.1 or later version https://support.industry.siemens.com/cs/ww/en/view/109800780/
RUGGEDCOM ROX RX1501: All versions < V2.14.1	Update to V2.14.1 or later version https://support.industry.siemens.com/cs/ww/en/view/109800780/
RUGGEDCOM ROX RX1510: All versions < V2.14.1	Update to V2.14.1 or later version https://support.industry.siemens.com/cs/ww/en/view/109800780/
RUGGEDCOM ROX RX1511: All versions < V2.14.1	Update to V2.14.1 or later version https://support.industry.siemens.com/cs/ww/en/view/109800780/
RUGGEDCOM ROX RX1512: All versions < V2.14.1	Update to V2.14.1 or later version https://support.industry.siemens.com/cs/ww/en/view/109800780/
RUGGEDCOM ROX RX1524: All versions < V2.14.1	Update to V2.14.1 or later version https://support.industry.siemens.com/cs/ww/en/view/109800780/
RUGGEDCOM ROX RX1536: All versions < V2.14.1	Update to V2.14.1 or later version https://support.industry.siemens.com/cs/ww/en/view/109800780/
RUGGEDCOM ROX RX5000: All versions < V2.14.1	Update to V2.14.1 or later version 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:

Apply the principle of least privileges for accounts configured on the affected devices

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

RUGGEDCOM products provide a level of robustness and reliability that have set the standard for communications networks deployed in harsh environments. Designed to meet and exceed IEC 61850-3 protocol requirements, the RUGGEDCOM Layer 3 Multi-Service Platform family of switches and routers offers integrated router, firewall and VPN functionalities. The RUGGEDCOM RX1400 is a multi-protocol intelligent node which combines Ethernet switching, routing and application hosting capabilities with various wide area connectivity options.

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-2021-37173

The command line interface of affected devices insufficiently restrict file read and write operations for low privileged users.

This could allow an authenticated remote attacker to escalate privileges and gain root access to the device.

CVSS v3.1 Base Score	8.8
CVSS Vector	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
CWE:	CWE-269: Improper Privilege Management

Vulnerability CVE-2021-37174

The affected devices have a privilege escalation vulnerability, if exploited, an attacker could gain root user access.

CVSS v3.1 Base Score	8.8
CVSS Vector	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
CWE:	CWE-250: Execution with Unnecessary Privileges

Vulnerability CVE-2021-37175

The affected devices do not properly handle permissions to traverse the file system. If exploited, an attacker could gain access to an overview of the complete file system on the affected devices.

CVSS v3.1 Base Score	4.3
CVSS Vector	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C
CWE:	CWE-280: Improper Handling of Insufficient Permissions or Privileges

ACKNOWLEDGMENTS

Siemens thanks the following parties for their efforts:

Michael Messner from Siemens Energy for reporting the vulnerabilities

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 (2021-09-14): Publication Date

V1.1 (2021-10-12): Improvement of CVE description

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SSA-150692