SSA-349422

Siemens Security Advisory by Siemens ProductCERT

SSA-349422: Denial of Service Vulnerability in Industrial Real-Time (IRT) Devices

Publication Date:	2019-10-08
Last Update:	2023-01-10
Current Version:	V1.8
CVSS v3.1 Base Score:	7.5

SUMMARY

A vulnerability in the affected products could allow an unauthorized attacker with network access to perform a denial-of-service attack resulting in loss of real-time synchronization.

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

AFFECTED PRODUCTS AND SOLUTION

Affected Product and Versions	Remediation
Development/Evaluation Kits for PROFINET IO: DK Standard Ethernet Controller All versions < V4.1.1 Patch 05	Update to V4.1.1 Patch 05 or later version https://support.industry.siemens.com/cs/ww/en/view/109755160/ See further recommendations from section Workarounds and Mitigations
Development/Evaluation Kits for PROFINET IO: EK-ERTEC 200 All versions < V4.5.0 Patch 01	Update to V4.5.0 Patch 01 or later version https://support.industry.siemens.com/cs/ww/en/view/109760397/ See further recommendations from section Workarounds and Mitigations
Development/Evaluation Kits for PROFINET IO: EK-ERTEC 200P All versions < V4.5.0	Update to V4.5.0 or later version https://support.industry.siemens.com/cs/ww/en/view/109750012/ See further recommendations from section Workarounds and Mitigations
SCALANCE X-200IRT switch family (incl. SIPLUS NET variants) All versions < V5.2.1	Update to V5.4.2 https://support.industry.siemens.com/cs/ww/en/view/109763309 See further recommendations from section Workarounds and Mitigations
SIMATIC ET200ecoPN, 4AO U/I 4xM12 (6ES7145-6HD00-0AB0) All versions	Currently no fix is planned See further recommendations from section Workarounds and Mitigations
SIMATIC ET200ecoPN, 8 DIO, DC24V/1,3A, 8xM12 (6ES7147-6BG00-0AB0) All versions	Currently no fix is planned See further recommendations from section Workarounds and Mitigations
SIMATIC ET200ecoPN, 8 DO, DC24V/2A, 8xM12 (6ES7142-6BR00-0AB0) All versions	Currently no fix is planned See further recommendations from section Workarounds and Mitigations
SIMATIC ET200ecoPN, 8AI RTD/TC 8xM12 (6ES7144-6KD50-0AB0) All versions	Currently no fix is planned See further recommendations from section Workarounds and Mitigations
SIMATIC ET200ecoPN, 8AI; 4 U/I; 4 RTD/TC 8xM12 (6ES7144-6KD00-0AB0) All versions	Currently no fix is planned See further recommendations from section Workarounds and Mitigations
SIMATIC ET200ecoPN, 8DI, DC24V, 4xM12 (6ES7141-6BF00-0AB0) All versions	Currently no fix is planned See further recommendations from section Workarounds and Mitigations
SIMATIC ET200ecoPN, 8DI, DC24V, 8xM12 (6ES7141-6BG00-0AB0) All versions	Currently no fix is planned See further recommendations from section Workarounds and Mitigations
SIMATIC ET200ecoPN, 8DO, DC24V/0,5A, 4xM12 (6ES7142-6BF50-0AB0) All versions	Currently no fix is planned See further recommendations from section Workarounds and Mitigations
SIMATIC ET200ecoPN, 8DO, DC24V/1,3A, 4xM12 (6ES7142-6BF00-0AB0) All versions	Currently no fix is planned See further recommendations from section Workarounds and Mitigations
SIMATIC ET200ecoPN, 8DO, DC24V/1,3A, 8xM12 (6ES7142-6BG00-0AB0) All versions	Currently no fix is planned See further recommendations from section Workarounds and Mitigations
SIMATIC ET200ecoPN, 16DI, DC24V, 8xM12 (6ES7141-6BH00-0AB0) All versions	Currently no fix is planned See further recommendations from section Workarounds and Mitigations
SIMATIC ET200ecoPN, 16DO DC24V/1,3A, 8xM12 (6ES7142-6BH00-0AB0) All versions	Currently no fix is planned See further recommendations from section Workarounds and Mitigations
SIMATIC ET200ecoPN: IO-Link Master (6ES7148-6JA00-0AB0) All versions	Currently no fix is planned See further recommendations from section Workarounds and Mitigations
SIMATIC ET200M (incl. SIPLUS variants) All versions	Currently no fix is planned See further recommendations from section Workarounds and Mitigations
SIMATIC ET200pro All versions	Currently no fix is planned See further recommendations from section Workarounds and Mitigations
SIMATIC ET200S (incl. SIPLUS variants) All versions	Currently no fix is planned See further recommendations from section Workarounds and Mitigations
SIMATIC ET 200pro IM154-8 PN/DP CPU (6ES7154-8AB01-0AB0) All versions < V3.2.17	Update to V3.2.17 or later version https://support.industry.siemens.com/cs/ww/en/view/47354502/ See further recommendations from section Workarounds and Mitigations
SIMATIC ET 200pro IM154-8F PN/DP CPU (6ES7154-8FB01-0AB0) All versions < V3.2.17	Update to V3.2.17 or later version https://support.industry.siemens.com/cs/ww/en/view/47354578/ See further recommendations from section Workarounds and Mitigations
SIMATIC ET 200pro IM154-8FX PN/DP CPU (6ES7154-8FX00-0AB0) All versions < V3.2.17	Update to V3.2.17 or later version https://support.industry.siemens.com/cs/ww/en/view/62612377/ See further recommendations from section Workarounds and Mitigations
SIMATIC ET 200S IM151-8 PN/DP CPU (6ES7151-8AB01-0AB0) All versions < V3.2.17	Update to V3.2.17 or later version https://support.industry.siemens.com/cs/ww/en/view/47353723/ See further recommendations from section Workarounds and Mitigations
SIMATIC ET 200S IM151-8F PN/DP CPU (6ES7151-8FB01-0AB0) All versions < V3.2.17	Update to V3.2.17 or later version https://support.industry.siemens.com/cs/ww/en/view/47354354/ See further recommendations from section Workarounds and Mitigations
SIMATIC NET CP 1604 All versions < V2.8	Update to V2.8 or later version https://support.industry.siemens.com/cs/ww/en/view/109762689/ See further recommendations from section Workarounds and Mitigations
SIMATIC NET CP 1616 All versions < V2.8	Update to V2.8 https://support.industry.siemens.com/cs/ww/en/view/109762689/ See further recommendations from section Workarounds and Mitigations
SIMATIC PN/PN Coupler (incl. SIPLUS NET variants) All versions	Currently no fix is planned See further recommendations from section Workarounds and Mitigations
SIMATIC S7-300 CPU 314C-2 PN/DP (6ES7314-6EH04-0AB0) All versions < V3.3.17	Update to V3.3.17 or later version https://support.industry.siemens.com/cs/ww/en/view/51466769/ See further recommendations from section Workarounds and Mitigations
SIMATIC S7-300 CPU 315-2 PN/DP (6ES7315-2EH14-0AB0) All versions < V3.2.17	Update to V3.2.17 or later version https://support.industry.siemens.com/cs/ww/en/view/40360647/ See further recommendations from section Workarounds and Mitigations
SIMATIC S7-300 CPU 315F-2 PN/DP (6ES7315-2FJ14-0AB0) All versions < V3.2.17	Update to V3.2.17 or later version https://support.industry.siemens.com/cs/ww/en/view/40944925/ See further recommendations from section Workarounds and Mitigations
SIMATIC S7-300 CPU 315T-3 PN/DP (6ES7315-7TJ10-0AB0) All versions < V3.2.17	Update to V3.2.17 or later version https://support.industry.siemens.com/cs/ww/en/view/85049260/ See further recommendations from section Workarounds and Mitigations
SIMATIC S7-300 CPU 317-2 PN/DP (6ES7317-2EK14-0AB0) All versions < V3.2.17	Update to V3.2.17 or later version https://support.industry.siemens.com/cs/ww/en/view/40362228/ See further recommendations from section Workarounds and Mitigations
SIMATIC S7-300 CPU 317F-2 PN/DP (6ES7317-2FK14-0AB0) All versions < V3.2.17	Update to V3.2.17 or later version https://support.industry.siemens.com/cs/ww/en/view/40945128/ See further recommendations from section Workarounds and Mitigations
SIMATIC S7-300 CPU 317T-3 PN/DP (6ES7317-7TK10-0AB0) All versions < V3.2.17	Update to V3.2.17 or later version https://support.industry.siemens.com/cs/ww/en/view/85059804/ See further recommendations from section Workarounds and Mitigations
SIMATIC S7-300 CPU 317TF-3 PN/DP (6ES7317-7UL10-0AB0) All versions < V3.2.17	Update to V3.2.17 or later version https://support.industry.siemens.com/cs/ww/en/view/85063017/ See further recommendations from section Workarounds and Mitigations
SIMATIC S7-300 CPU 319-3 PN/DP (6ES7318-3EL01-0AB0) All versions < V3.2.17	Update to V3.2.17 or later version https://support.industry.siemens.com/cs/ww/en/view/44442927/ See further recommendations from section Workarounds and Mitigations
SIMATIC S7-300 CPU 319F-3 PN/DP (6ES7318-3FL01-0AB0) All versions < V3.2.17	Update to V3.2.17 or later version https://support.industry.siemens.com/cs/ww/en/view/44443101/ See further recommendations from section Workarounds and Mitigations
SIMATIC S7-400 PN/DP V6 and below CPU family (incl. SIPLUS variants) All versions	Currently no fix is planned See further recommendations from section Workarounds and Mitigations
SIMATIC S7-400 PN/DP V7 CPU family (incl. SIPLUS variants) All versions	Currently no fix is available See further recommendations from section Workarounds and Mitigations
SIMATIC WinAC RTX 2010 (6ES7671-0RC08-0YA0) All versions < V2010 SP3	Update to V2010 SP3 or later version and apply BIOS and Microsoft Windows updates https://support.industry.siemens.com/cs/ww/en/view/109765109/ See further recommendations from section Workarounds and Mitigations
SIMATIC WinAC RTX F 2010 (6ES7671-1RC08-0YA0) All versions < V2010 SP3	Update to V2010 SP3 or later version and apply BIOS and Microsoft Windows updates https://support.industry.siemens.com/cs/ww/en/view/109765109/ See further recommendations from section Workarounds and Mitigations
SIMOTION (incl. SIPLUS variants) All versions	Currently no fix is planned See further recommendations from section Workarounds and Mitigations
SINAMICS DCM All versions < V1.5 HF1	Update to V1.5 HF1 or later version https://support.industry.siemens.com/cs/us/en/view/44029688 See further recommendations from section Workarounds and Mitigations
SINAMICS DCP All versions < V1.3	Update to V1.3 https://support.industry.siemens.com/cs/ww/de/view/109773826 See further recommendations from section Workarounds and Mitigations
SINAMICS G110M V4.7 Control Unit All versions < V4.7 SP10 HF5	Update to V4.7 SP10 HF5 https://support.industry.siemens.com/cs/us/en/view/109756820 See further recommendations from section Workarounds and Mitigations
SINAMICS G120 V4.7 Control Unit (incl. SIPLUS variants) All versions < V4.7 SP10 HF5	Update to V4.7 SP10 HF5 https://support.industry.siemens.com/cs/us/en/view/109756820 See further recommendations from section Workarounds and Mitigations
SINAMICS G130 V4.7 Control Unit All versions < V4.7 HF29	Update to V4.7 HF29 or upgrade to V5.2 HF2 https://support.industry.siemens.com/cs/ww/en/view/103433117/ See further recommendations from section Workarounds and Mitigations
SINAMICS G150 Control Unit All versions < V4.8	Currently no fix is planned See further recommendations from section Workarounds and Mitigations
SINAMICS GH150 V4.7 Control Unit All versions	Update to V4.8 SP2 HF9 The update can be obtained from your Siemens representative or via Siemens customer service. See further recommendations from section Workarounds and Mitigations
SINAMICS GL150 V4.7 Control Unit All versions	Update to V4.8 SP2 HF9 The update can be obtained from your Siemens representative or via Siemens customer service. See further recommendations from section Workarounds and Mitigations
SINAMICS GM150 V4.7 Control Unit All versions	Update to V4.8 SP2 HF9 The update can be obtained from your Siemens representative or via Siemens customer service. See further recommendations from section Workarounds and Mitigations
SINAMICS S110 Control Unit All versions	Currently no fix is planned See further recommendations from section Workarounds and Mitigations
SINAMICS S120 V4.7 Control Unit and CBE20 (incl. SIPLUS variants) All versions < V4.7 HF34	Update to V4.7 HF34 or upgrade to V5.2 HF2 https://support.industry.siemens.com/cs/us/en/view/92522512 See further recommendations from section Workarounds and Mitigations
SINAMICS S150 Control Unit All versions < V4.8	Currently no fix is planned See further recommendations from section Workarounds and Mitigations
SINAMICS SL150 V4.7 Control Unit All versions < V4.7 HF33	Update to V4.7 HF33 The update can be obtained from your Siemens representative or via Siemens customer service. See further recommendations from section Workarounds and Mitigations
SINAMICS SM120 V4.7 Control Unit All versions	Currently no fix is planned See further recommendations from section Workarounds and Mitigations
SINUMERIK 828D All versions < V4.8 SP5	Update to V4.8 SP5 or later version The update can be obtained from your Siemens representative or via Siemens customer service. See further recommendations from section Workarounds and Mitigations
SINUMERIK 840D sl All versions < V4.8 SP5	Update to V4.8 SP5 or later version The update can be obtained from your Siemens representative or via Siemens customer service. See further recommendations from section Workarounds and Mitigations
SIPLUS ET 200S IM151-8 PN/DP CPU (6AG1151-8AB01-7AB0) All versions < V3.2.17	Update to V3.2.17 or later version https://support.industry.siemens.com/cs/ww/en/view/47353723/ See further recommendations from section Workarounds and Mitigations
SIPLUS ET 200S IM151-8F PN/DP CPU (6AG1151-8FB01-2AB0) All versions < V3.2.17	Update to V3.2.17 or later version https://support.industry.siemens.com/cs/ww/en/view/47354354/ See further recommendations from section Workarounds and Mitigations
SIPLUS S7-300 CPU 314C-2 PN/DP (6AG1314-6EH04-7AB0) All versions < V3.3.17	Update to V3.3.17 or later version https://support.industry.siemens.com/cs/ww/en/view/51466769/ See further recommendations from section Workarounds and Mitigations
SIPLUS S7-300 CPU 315-2 PN/DP (6AG1315-2EH14-7AB0) All versions < V3.2.17	Update to V3.2.17 or later version https://support.industry.siemens.com/cs/ww/en/view/40360647/ See further recommendations from section Workarounds and Mitigations
SIPLUS S7-300 CPU 315F-2 PN/DP (6AG1315-2FJ14-2AB0) All versions < V3.2.17	Update to V3.2.17 or later version https://support.industry.siemens.com/cs/ww/en/view/40944925/ See further recommendations from section Workarounds and Mitigations
SIPLUS S7-300 CPU 317-2 PN/DP (6AG1317-2EK14-7AB0) All versions < V3.2.17	Update to V3.2.17 or later version https://support.industry.siemens.com/cs/ww/en/view/40362228/ See further recommendations from section Workarounds and Mitigations
SIPLUS S7-300 CPU 317F-2 PN/DP (6AG1317-2FK14-2AB0) All versions < V3.2.17	Update to V3.2.17 or later version https://support.industry.siemens.com/cs/ww/en/view/40945128/ See further 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:

Disable SNMP in Versions 1 and 2c, if supported by the product.
Enable SNMP v3 if required and supported by the product to restrict the vulnerability to authenticated users.
Enable access protection and change default credentials for SNMP service, if possible
Restrict network access to port 161/udp of the affected product.

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

Development/Evaluation Kits for PROFINET IO are used to develop compact or modular PROFINET field devices.

PN/PN coupler is used for connecting two PROFINET networks.

SCALANCE X switches are used to connect industrial components like Programmable Logic Controllers (PLCs) or Human Machine Interfaces (HMIs).

SIMATIC CP 1616 and CP 1604 are PCI/PCI-104 cards for high-performance connection of field devices to Industrial Ethernet with PROFINET.

SIMATIC ET 200 Interface modules for PROFINET IO are used to connect field devices (IO Devices) to controllers (IO Controller) via PROFINET.

SIMATIC S7-300 controllers have been designed for discrete and continuous control in industrial environments such as manufacturing, food and beverages, and chemical industries worldwide.

SIMATIC S7-400 controllers have been designed for discrete and continuous control in industrial environments such as manufacturing, food and beverages, and chemical industries worldwide.

SIMATIC WinAC RTX is a SIMATIC software controller for PC-based automation solutions.

SIMOTION is a scalable high performance hardware and software system for motion control.

SIPLUS extreme products are designed for reliable operation under extreme conditions and are based on SIMATIC, LOGO!, SITOP, SINAMICS, SIMOTION, SCALANCE or other devices. SIPLUS devices use the same firmware as the product they are based on.

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-2019-10923

An attacker with network access to an affected product may cause a denial of service condition by breaking the real-time synchronization (IRT) of the affected installation.

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 party for its efforts:

Artem Zinenko from Kaspersky for pointing out that SIPLUS should also be mentioned

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 (2019-10-08):	Publication Date
V1.1 (2020-01-14):	Added solution for SINAMICS SL150 V4.7, SIPLUS devices now explicitly mentioned in the list of affected products, correction in section "Workarounds and Mitigations"
V1.2 (2020-02-11):	Added solution for SINAMICS DCP
V1.3 (2020-03-10):	Added solution for SIMATIC S7-300 CPU family
V1.4 (2020-08-11):	Added SIMATIC ET200ecoPN product variants (MLFB IDs) that are not affected
V1.5 (2021-02-09):	Added additional SIMATIC ET200ecoPN model (6ES7148-6JG00-0BB0) as not affected
V1.6 (2021-10-12):	Clarified affected ET200ecoPN models
V1.7 (2022-02-08):	Clarified that no remediation is planned for ET200 devices
V1.8 (2023-01-10):	SIMATIC S7-300 CPU family expanded with product specific designations, patch links and MLFBs. Added fix for SINUMERIK 840D sl.

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