ATTENTION: Exploitable from an adjacent network/low skill level to exploit.
Equipment: Devices using the PROFINET Discovery and Configuration Protocol (DCP)
Vulnerability: Improper Input Validation
This updated advisory is a follow-up to the updated advisory titled ICSA-17-129-02I Siemens devices using the PROFINET Discovery and Configuration Protocol, which was published January 25, 2018, on the NCCIC/ICS-CERT website.
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Siemens reports that these vulnerabilities affect the following products using PROFINET DCP:
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Successful exploitation of these vulnerabilities could cause the targeted device to enter a denial-of-service condition, which may require human interaction to recover the system.
The attacker must have network access to the local Ethernet segment (Layer 2).
Siemens strongly recommends verifying the affected products are protected as described in PROFINET Security Guidelines and Siemens Operational Guidelines in order to run the devices in a protected IT environment.
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Siemens provides firmware updates fixing the vulnerabilities for the following affected products and recommends users update to the new fixed version:
SIMATIC CP 443-1 Std: Update to V3.2.17
SIMATIC CP 443-1 Adv: Update to V3.2.17
SIMATIC CP 1243-1 and SIMATIC CP 1243-1 IRC: Update to V2.1.82
SIMATIC CM 1542-1: Update to V2.0
SIMATIC CP 1542SP-1, CP 1542SP-1 IRC, and CP 1543SP-1: Update to V1.0.15
SIMATIC CP 1543-1: Update to V2.1
SIMATIC RF650R, RF680R, RF685R: Update to V3.0
SIMATIC CP 1616, CP 1604, DK-16xx PN IO: Update to V2.7
SCALANCE X-200: Update to V5.2.2:
SCALANCE X-300/X408: Update to V4.1.0
SCALANCE X414: Update to V3.10.2
SCALANCE XM400: Update to V6.1
SCALANCE XR500: Update to V6.1
SCALANCE W700: Update to V6.1.0
SCALANCE M-800, S615: Update to V04.3
Softnet PROFINET IO for PC-based Windows systems: Upgrade to V14 SP1:
IE/PB-Link: Upgrade to V3.0
SITOP PSU8600 PROFINET: Update to V1.2.0
SITOP UPS1600 PROFINET: Update to V2.2.0
SIMATIC ET 200AL: Update to V1.0.2:
SIMATIC ET 200SP: Update to V4.1.0
SIMATIC ET 200MP IM155-5 PN BA: Update to V4.0.1 or newer
SIMATIC ET 200MP IM155-5 PN ST: Update to V4.1
SIMATIC ET 200SP IM155-6 PN ST: Update to V4.1.0
SIMATIC PN/PN Coupler: Upgrade to V4.0
Development/Evaluation Kits DK Standard Ethernet Controller: Update to V4.1.1 Patch04
SIMATIC S7-200 SMART: Contact the local Siemens representative or customer support to update to V2.3
SIMATIC S7-300 including F and T: Update to V3.X.14
SIMATIC S7-400 PN/DP V6 Incl. F: Update to V6.0.6:
SIMATIC S7-400 PN/DP V7 Incl. F: Update to V7.0.2:
SIMATIC S7-400-H V6: Update to V6.0.7
SIMATIC S7-CPU 410: Update to V8.2
SIMATIC S7-1200 including F: Update to V4.2.1
SIMATIC S7-1500 including F, T and TF: Update to V2.1
SIMATIC S7-1500 Software Controller including F: Update to V2.1
SINAMICS DCM w. PN: Update to V1.4 SP1 HF5
SINAMICS DCP w. PN: Update to V1.2 HF1:
SINAMICS G110M/G120(C/P/D) w. PN: Update to V4.7 SP6 HF3
SINAMICS G130 and G150 V4.7: Update to V4.7 HF27
SINAMICS G130 and G150 V4.8: Update to V4.8 HF4
SINAMICS S110 w. PN: Update to V4.4 SP3 HF5
SINAMICS S120 V4.7: Update to V4.7 HF27
SINAMICS S120 V4.8: Update to V4.8 HF4
SINAMICS S150 V4.7: Update to V4.7 HF27
SINAMICS S150: V4.8: Update to V4.8 HF4
SINAMICS V90 w. PN: Update to V1.1
SIMOCODE pro V PROFINET: Update to V2.0.0
SIMOTION: Update to V4.5 HF1
SINUMERIK 828D V4.5: Update to V4.5 SP6 HF2
SINUMERIK software can be obtained from the local Siemens account manager.
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Siemens is preparing updates for the remaining affected products and recommends the following mitigations in the meantime:
As a general security measure Siemens and PNO strongly recommend protecting industrial control systems networks with appropriate mechanisms. Siemens encourages users to verify that the affected products are protected as described in PNO Security Guidelines and Siemens operational guidelines in order to run the devices in a protected IT environment.
For more information on these vulnerabilities and more detailed mitigation instructions, please see Siemens Security Advisory SSA-293562 at the following location:
NCCIC reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
NCCIC also provides a section for control systems security recommended practices on the ICS-CERT web page. Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
Additional mitigation guidance and recommended practices are publicly available in the NCCIC Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies, that is available for download from the ICS-CERT web site.
Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to NCCIC for tracking and correlation against other incidents.
No known public exploits specifically target these vulnerabilities.
Specially crafted PROFINET DCP broadcast packets could cause a denial-of-service condition of affected products on a local Ethernet segment (Layer 2). Human interaction is required to recover the systems. PROFIBUS interfaces are not affected.
Specially crafted PROFINET DCP packets sent on a local Ethernet segment (Layer 2) to an affected product could cause a denial-of-service condition in that product. Human interaction is required to recover the system. PROFIBUS interfaces are not affected.
This vulnerability affects only SIMATIC HMI Multi Panels and HMI Mobile Panels, and S7-300/S7-400 devices.
Duan JinTong, Ma ShaoShuai, and Cheng Lei from NSFOCUS Security Team reported these vulnerabilities directly to Siemens.
Critical Infrastructure Sectors: Critical Manufacturing, Food and Agriculture, Chemical, Energy, Water and Wastewater Systems
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Germany