SSA-250085

Siemens Security Advisory by Siemens ProductCERT

SSA-250085: Multiple Vulnerabilities in SINEC NMS and SINEMA Server

Publication Date:	2022-03-08
Last Update:	2023-10-10
Current Version:	V1.3
CVSS v3.1 Base Score:	7.3

SUMMARY

SINEC NMS and SINEMA Server V14 contain multiple vulnerabilities that could allow an attacker to execute arbitrary code on the system, arbitrary commands on the local database or achieve privilege escalation.

Siemens has released several updates for SINEC NMS and recommends to update to the latest version. Siemens recommends specific countermeasures for products where updates are not, or not yet available.

AFFECTED PRODUCTS AND SOLUTION

Affected Product and Versions	Remediation
SINEC NMS All versions < V1.0.3	Update to V1.0.3 or later version https://support.industry.siemens.com/cs/ww/en/view/109813788/ See further recommendations from section Workarounds and Mitigations
SINEC NMS All versions >= V1.0.3 < V2.0 affected by CVE-2022-24282, CVE-2022-25311	Update to V2.0 or later version https://support.industry.siemens.com/cs/ww/en/view/109824030/ See further recommendations from section Workarounds and Mitigations
SINEMA Server V14 All versions	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:

Restrict access to the affected systems, especially to port 443/tcp, to trusted IP addresses only
CVE-2022-25311: If SSO was established and user is authenticated in both Control and Operation, it is recommended to logout explicitly in both Control and Operation to avoid privilege escalation

Product-specific remediations or mitigations can be found in the section Affected Products and Solution.
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

SINEC NMS is a new generation of the Network Management System (NMS) for the Digital Enterprise. This system can be used to centrally monitor, manage, and configure networks.

SINEMA Server is a network monitoring and management software designed by Siemens for use in Industrial Ethernet networks.

VULNERABILITY CLASSIFICATION

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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-2022-24281

A privileged authenticated attacker could execute arbitrary commands in the local database by sending specially crafted requests to the webserver of the affected application.

CVSS v3.1 Base Score	7.2
CVSS Vector	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
CWE	CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

Vulnerability CVE-2022-24282

The affected system allows to upload JSON objects that are deserialized to Java objects. Due to insecure deserialization of user-supplied content by the affected software, a privileged attacker could exploit this vulnerability by sending a maliciously crafted serialized Java object. This could allow the attacker to execute arbitrary code on the device with root privileges.

CVSS v3.1 Base Score	7.2
CVSS Vector	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:T/RC:C
CWE	CWE-502: Deserialization of Untrusted Data

Vulnerability CVE-2022-25311

The affected software do not properly check privileges between users during the same web browser session, creating an unintended sphere of control. This could allow an authenticated low privileged user to achieve privilege escalation.

CVSS v3.1 Base Score	7.3
CVSS Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:P/RL:T/RC:C
CWE	CWE-269: Improper Privilege Management

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 (2022-03-08):	Publication Date
V1.1 (2022-10-11):	Added fix for CVE-2022-24281 in SINEC NMS V1.0.3
V1.2 (2023-03-14):	Added SINEMA Server V14 to the list of affected products
V1.3 (2023-10-10):	Added fix for remaining vulnerabilities in SINEC NMS V2.0

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