CVE-2017-2680 in SIMATIC
Summary
by MITRE
Siemens SIMATIC CP 343-1 Std, CP 343-1 Lean (All versions), SIMATIC CP 343-1 Adv (All versions), SIMATIC CP 443-1 Std, CP 443-1 Adv (All versions before V3.2.17), SIMATIC CP 443-1 OPC-UA (All versions), SIMATIC CP 1243-1 (All versions), SIMATIC CM 1542-1 (All versions before V2.0), SIMATIC CP 1542SP-1, CP 1542SP-1 IRC, and CP 1543SP-1 (All versions), SIMATIC CP 1543-1 (All versions before V2.1), SIMATIC RF650R, RF680R, RF685R (All versions before V3.0), SIMATIC CP 1616, CP 1604, DK-16xx PN IO (All versions before V2.7), SCALANCE X200 (All versions), SCALANCE X200 IRT (All versions), SCALANCE X300, X408, X414 (All versions), SCALANCE XM400, XR500 (All versions), SCALANCE W700 (All versions before V6.1), SCALANCE M-800, S615 (All versions), Softnet PROFINET IO for PC-based Windows systems (All versions), IE/PB-Link (All versions before V3.0), IE/AS-i Link PN IO (All versions), SIMATIC Teleservice Adapter Standard Modem, IE Basic, IE Advanced (All versions), SITOP PSU8600 / UPS1600 PROFINET (All versions), SIMATIC ET 200AL (All versions), SIMATIC ET 200ecoPN (All versions), SIMATIC ET 200M (All versions), SIMATIC ET 200MP (All versions before V4.0.1), SIMATIC ET 200pro (All versions), SIMATIC ET 200S (All versions), SIMATIC ET 200SP (All versions), PN/PN Coupler (All versions), DK Standard Ethernet Controller (All versions before V4.1.1 Patch04), EK-ERTEC 200P PN IO (All versions before V4.4.0 Patch01), EK-ERTEC 200 PN IO (All versions before V4.2.1 Patch03), SIMATIC S7-200 SMART (All versions), SIMATIC S7-300 incl. F and T (All versions before V3.X.14), SIMATIC S7-400 incl. F and H (All versions), SIMATIC S7-1200 incl. F (All versions before V4.2.1), SIMATIC S7-1500 incl. F, T, and TF (All versions before V2.1), SIMATIC S7-1500 Software Controller incl. F (All versions before V2.1), SIMATIC WinAC RTX 2010 incl. F (All versions), SIRIUS ACT 3SU1 interface module PROFINET (All versions), SIRIUS Soft starter 3RW44 PN (All versions), SIRIUS Motor starter M200D PROFINET (All versions), SIMOCODE pro V PROFINET (All versions), SINAMICS DCM (All versions), SINAMICS DCP (All versions), SINAMICS G110M / G120(C/P/D) w. PN (All versions before V4.7 SP6 HF3), SINAMICS G130 and G150 (All versions before V4.8 HF4), SINAMICS S110 w. PN (All versions), SINAMICS S120 (All versions before V4.8 HF4), SINAMICS S150 (All versions before V4.8 HF4), SINAMICS V90 w. PN (All versions), SIMOTION (All versions before V4.5 HF1), SINUMERIK 828D (V4.7 before SP6 HF8 and before V4.5), SINUMERIK 840D sl (V4.7 before SP6 HF8 and before V4.5), SIMATIC HMI Comfort Panels, HMI Multi Panels, HMI Mobile Panels (All versions) could be affected by a Denial-of-Service condition induced by a specially crafted PROFINET DCP broadcast (Layer 2 - Ethernet) packet.
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Analysis
by VulDB Data Team • 07/09/2024
The vulnerability identified as CVE-2017-2680 represents a critical Denial-of-Service condition affecting a broad spectrum of Siemens industrial network devices and software components that implement PROFINET communication protocols. This weakness specifically manifests through the processing of specially crafted PROFINET DCP (Device Configuration Protocol) broadcast packets at the Layer 2 Ethernet level, creating a condition where legitimate network operations can be disrupted or entirely halted. The vulnerability impacts numerous SIMATIC controllers, communication modules, and network infrastructure devices across multiple product lines including CP 343-1, CP 443-1, CP 1542-1, CP 1543-1, ET 200 series, S7-300, S7-400, S7-1200, S7-1500, SINAMICS drive systems, and various HMI panels. The scope extends to both hardware and software implementations across different generations of Siemens industrial automation products, making this a widespread concern for industrial control systems.
The technical flaw stems from insufficient input validation and error handling within the PROFINET DCP processing logic of affected devices. When a maliciously crafted DCP broadcast packet is transmitted over the network, the device fails to properly sanitize or reject malformed packets, leading to unexpected behavior that can result in system crashes, restarts, or complete service unavailability. This vulnerability operates at the network layer where DCP packets are used for device discovery, configuration, and network management functions, making it particularly dangerous as it can disrupt critical industrial processes. The attack vector is straightforward requiring only the transmission of a specially constructed Ethernet frame, making it accessible to both skilled and less skilled attackers. This weakness is classified under CWE-129, Input Validation, and aligns with ATT&CK technique T1499.002 for Network Denial of Service, demonstrating how industrial protocols can be exploited for service disruption attacks.
The operational impact of this vulnerability extends far beyond simple network disruption, potentially leading to significant production downtime, safety system failures, and financial losses in industrial environments. When affected devices experience denial-of-service conditions, critical manufacturing processes may halt or operate in degraded modes, affecting production schedules and potentially causing safety incidents in process control applications. The vulnerability affects devices that are fundamental to industrial automation, including those used in critical infrastructure sectors such as oil and gas, water treatment, power generation, and manufacturing. The widespread nature of affected products means that entire industrial networks could be compromised simultaneously, as many of these devices operate within the same network segments and rely on DCP for normal operation. The vulnerability's impact is particularly severe in environments where continuous operation is critical, as the service disruption can lead to production losses measured in thousands of dollars per hour.
Mitigation strategies for CVE-2017-2680 should focus on both immediate protective measures and long-term architectural improvements. Organizations should implement network segmentation to isolate critical industrial control systems from general IT networks, reducing the attack surface and limiting the potential impact of such attacks. Device firmware updates should be applied immediately where available, particularly for versions prior to the specified patches mentioned in the vulnerability description. Network monitoring and intrusion detection systems should be configured to detect unusual DCP packet activity and anomalous broadcast traffic patterns that could indicate exploitation attempts. Access controls should be strengthened to ensure that only authorized personnel can access network management functions, and network access control lists should be implemented to filter DCP traffic at network boundaries. Additionally, regular vulnerability assessments and security audits of industrial control systems should be conducted to identify and remediate similar weaknesses. The vulnerability highlights the importance of industrial network security standards and practices, particularly those addressing the security of PROFINET implementations and the need for robust input validation in industrial communication protocols.