A vulnerability has been identified in SIMATIC CFU DIQ, SIMATIC CFU PA, SIMATIC ET 200pro IM154-8 PN/DP CPU, SIMATIC ET 200pro IM154-8F PN/DP CPU, SIMATIC ET 200pro IM154-8FX PN/DP CPU, SIMATIC ET 200S IM151-8 PN/DP CPU, SIMATIC ET 200S IM151-8F PN/DP CPU, SIMATIC ET200AL IM157-1 PN, SIMATIC ET200ecoPN, AI 8xRTD/TC, M12-L, SIMATIC ET200ecoPN, CM 4x IO-Link, M12-L, SIMATIC ET200ecoPN, CM 8x IO-Link, M12-L, SIMATIC ET200ecoPN, CM 8x IO-Link, M12-L, SIMATIC ET200ecoPN, DI 16x24VDC, M12-L, SIMATIC ET200ecoPN, DI 8x24VDC, M12-L, SIMATIC ET200ecoPN, DIQ 16x24VDC/2A, M12-L, SIMATIC ET200ecoPN, DQ 8x24VDC/0,5A, M12-L, SIMATIC ET200ecoPN, DQ 8x24VDC/2A, M12-L, SIMATIC ET200MP IM155-5 PN HF (incl. SIPLUS variants), SIMATIC ET200SP IM155-6 MF HF, SIMATIC ET200SP IM155-6 PN HA (incl. SIPLUS variants), SIMATIC ET200SP IM155-6 PN HF (incl. SIPLUS variants), SIMATIC ET200SP IM155-6 PN/2 HF (incl. SIPLUS variants), SIMATIC ET200SP IM155-6 PN/3 HF (incl. SIPLUS variants), SIMATIC PN/MF Coupler, SIMATIC PN/PN Coupler, SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants), SIMATIC S7-300 CPU 314C-2 PN/DP, SIMATIC S7-300 CPU 315-2 PN/DP, SIMATIC S7-300 CPU 315F-2 PN/DP, SIMATIC S7-300 CPU 315T-3 PN/DP, SIMATIC S7-300 CPU 317-2 PN/DP, SIMATIC S7-300 CPU 317F-2 PN/DP, SIMATIC S7-300 CPU 317T-3 PN/DP, SIMATIC S7-300 CPU 317TF-3 PN/DP, SIMATIC S7-300 CPU 319-3 PN/DP, SIMATIC S7-300 CPU 319F-3 PN/DP, SIMATIC S7-400 CPU 412-2 PN V7, SIMATIC S7-400 CPU 414-3 PN/DP V7, SIMATIC S7-400 CPU 414F-3 PN/DP V7, SIMATIC S7-400 CPU 416-3 PN/DP V7, SIMATIC S7-400 CPU 416F-3 PN/DP V7, SIMATIC S7-400 H V6 CPU family (incl. SIPLUS variants), SIMATIC S7-410 V10 CPU family (incl. SIPLUS variants), SIMATIC S7-410 V8 CPU family (incl. SIPLUS variants), SIMATIC TDC CP51M1, SIMATIC TDC CPU555, SIMATIC WinAC RTX 2010, SIMATIC WinAC RTX F 2010, SINAMICS DCM, SINAMICS G110M, SINAMICS G115D, SINAMICS G120 (incl. SIPLUS variants), SINAMICS G130, SINAMICS G150, SINAMICS S110, SINAMICS S120 (incl. SIPLUS variants), SINAMICS S150, SINAMICS S210, SINAMICS V90, SIPLUS ET 200S IM151-8 PN/DP CPU, SIPLUS ET 200S IM151-8F PN/DP CPU, SIPLUS HCS4200 CIM4210, SIPLUS HCS4200 CIM4210C, SIPLUS HCS4300 CIM4310, SIPLUS NET PN/PN Coupler, SIPLUS S7-300 CPU 314C-2 PN/DP, SIPLUS S7-300 CPU 315-2 PN/DP, SIPLUS S7-300 CPU 315F-2 PN/DP, SIPLUS S7-300 CPU 317-2 PN/DP, SIPLUS S7-300 CPU 317F-2 PN/DP, SIPLUS S7-400 CPU 414-3 PN/DP V7, SIPLUS S7-400 CPU 416-3 PN/DP V7. The PROFINET (PNIO) stack, when integrated with the Interniche IP stack, improperly handles internal resources for TCP segments where the minimum TCP-Header length is less than defined.

This could allow an attacker to create a denial of service condition for TCP services on affected devices by sending specially crafted TCP segments.

A vulnerability has been identified in Development/Evaluation Kits for PROFINET IO: EK-ERTEC 200 (All versions), Development/Evaluation Kits for PROFINET IO: EK-ERTEC 200P (All versions), KTK ATE530S (All versions), SIDOOR ATD430W (All versions), SIDOOR ATE530S COATED (All versions), SIDOOR ATE531S (All versions), SIMATIC ET 200pro IM154-8 PN/DP CPU (All versions), SIMATIC ET 200pro IM154-8F PN/DP CPU (All versions), SIMATIC ET 200pro IM154-8FX PN/DP CPU (All versions), SIMATIC ET 200S IM151-8 PN/DP CPU (All versions), SIMATIC ET 200S IM151-8F PN/DP CPU (All versions), SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants) (All versions < V2.0), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions < V2.0), SIMATIC ET200AL IM157-1 PN (All versions), SIMATIC ET200ecoPN, AI 8xRTD/TC, M12-L (All versions >= V5.1.1), SIMATIC ET200ecoPN, CM 4x IO-Link, M12-L (All versions >= V5.1.1), SIMATIC ET200ecoPN, CM 8x IO-Link, M12-L (All versions >= V5.1.1), SIMATIC ET200ecoPN, CM 8x IO-Link, M12-L (All versions >= V5.1.1), SIMATIC ET200ecoPN, DI 16x24VDC, M12-L (All versions >= V5.1.1), SIMATIC ET200ecoPN, DI 8x24VDC, M12-L (All versions >= V5.1.1), SIMATIC ET200ecoPN, DIQ 16x24VDC/2A, M12-L (All versions >= V5.1.1), SIMATIC ET200ecoPN, DQ 8x24VDC/0,5A, M12-L (All versions >= V5.1.1), SIMATIC ET200ecoPN, DQ 8x24VDC/2A, M12-L (All versions >= V5.1.1), SIMATIC ET200MP IM155-5 PN HF (incl. SIPLUS variants) (All versions >= V4.2), SIMATIC ET200SP IM155-6 MF HF (All versions), SIMATIC ET200SP IM155-6 PN HA (incl. SIPLUS variants) (All versions), SIMATIC ET200SP IM155-6 PN HF (incl. SIPLUS variants) (All versions >= V4.2), SIMATIC ET200SP IM155-6 PN/2 HF (incl. SIPLUS variants) (All versions >= V4.2), SIMATIC ET200SP IM155-6 PN/3 HF (incl. SIPLUS variants) (All versions >= V4.2), SIMATIC MICRO-DRIVE PDC (All versions), SIMATIC PN/MF Coupler (All versions), SIMATIC PN/PN Coupler (All versions >= V4.2), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All versions < V4.4.0), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions < V2.0), SIMATIC S7-1500 Software Controller (All versions < V2.0), SIMATIC S7-300 CPU 314C-2 PN/DP (All versions), SIMATIC S7-300 CPU 315-2 PN/DP (All versions), SIMATIC S7-300 CPU 315F-2 PN/DP (All versions), SIMATIC S7-300 CPU 315T-3 PN/DP (All versions), SIMATIC S7-300 CPU 317-2 PN/DP (All versions), SIMATIC S7-300 CPU 317F-2 PN/DP (All versions), SIMATIC S7-300 CPU 317T-3 PN/DP (All versions), SIMATIC S7-300 CPU 317TF-3 PN/DP (All versions), SIMATIC S7-300 CPU 319-3 PN/DP (All versions), SIMATIC S7-300 CPU 319F-3 PN/DP (All versions), SIMATIC S7-400 H V6 CPU family and below (incl. SIPLUS variants) (All versions), SIMATIC S7-400 PN/DP V7 CPU family (incl. SIPLUS variants) (All versions), SIMATIC S7-410 V10 CPU family (incl. SIPLUS variants) (All versions), SIMATIC S7-410 V8 CPU family (incl. SIPLUS variants) (All versions), SIMATIC TDC CP51M1 (All versions), SIMATIC TDC CPU555 (All versions), SIMATIC WinAC RTX 2010 (All versions), SIMATIC WinAC RTX F 2010 (All versions), SINAMICS S/G Control Unit w. PROFINET (All versions), SIPLUS ET 200S IM151-8 PN/DP CPU (All versions), SIPLUS ET 200S IM151-8F PN/DP CPU (All versions), SIPLUS NET PN/PN Coupler (All versions >= V4.2), SIPLUS S7-300 CPU 314C-2 PN/DP (All versions), SIPLUS S7-300 CPU 315-2 PN/DP (All versions), SIPLUS S7-300 CPU 315F-2 PN/DP (All versions), SIPLUS S7-300 CPU 317-2 PN/DP (All versions), SIPLUS S7-300 CPU 317F-2 PN/DP (All versions). The Interniche-based TCP Stack can be forced to make very expensive calls for every incoming packet which can lead to a denial of service.

A vulnerability has been identified in SIMATIC S7-400 CPU 414-3 PN/DP V7, SIMATIC S7-400 CPU 414F-3 PN/DP V7, SIMATIC S7-400 CPU 416-3 PN/DP V7, SIMATIC S7-400 CPU 416F-3 PN/DP V7, Development/Evaluation Kits for PROFINET IO: DK Standard Ethernet Controller, Development/Evaluation Kits for PROFINET IO: EK-ERTEC 200, Development/Evaluation Kits for PROFINET IO: EK-ERTEC 200P, SCALANCE X-200IRT switch family (incl. SIPLUS NET variants), SIMATIC ET 200pro IM154-8 PN/DP CPU, SIMATIC ET 200pro IM154-8F PN/DP CPU, SIMATIC ET 200pro IM154-8FX PN/DP CPU, SIMATIC ET 200S IM151-8 PN/DP CPU, SIMATIC ET 200S IM151-8F PN/DP CPU, SIMATIC ET200ecoPN, 16DI, DC24V, 8xM12, SIMATIC ET200ecoPN, 16DO DC24V/1,3A, 8xM12, SIMATIC ET200ecoPN, 4AO U/I 4xM12, SIMATIC ET200ecoPN, 8 DIO, DC24V/1,3A, 8xM12, SIMATIC ET200ecoPN, 8 DO, DC24V/2A, 8xM12, SIMATIC ET200ecoPN, 8AI RTD/TC 8xM12, SIMATIC ET200ecoPN, 8AI; 4 U/I; 4 RTD/TC 8xM12, SIMATIC ET200ecoPN, 8DI, DC24V, 4xM12, SIMATIC ET200ecoPN, 8DI, DC24V, 8xM12, SIMATIC ET200ecoPN, 8DO, DC24V/0,5A, 4xM12, SIMATIC ET200ecoPN, 8DO, DC24V/1,3A, 4xM12, SIMATIC ET200ecoPN, 8DO, DC24V/1,3A, 8xM12, SIMATIC ET200ecoPN: IO-Link Master, SIMATIC ET200M (incl. SIPLUS variants), SIMATIC ET200pro, SIMATIC ET200S (incl. SIPLUS variants), SIMATIC NET CP 1604, SIMATIC NET CP 1616, SIMATIC PN/PN Coupler (incl. SIPLUS NET variants), SIMATIC S7-300 CPU 314C-2 PN/DP, SIMATIC S7-300 CPU 315-2 PN/DP, SIMATIC S7-300 CPU 315F-2 PN/DP, SIMATIC S7-300 CPU 315T-3 PN/DP, SIMATIC S7-300 CPU 317-2 PN/DP, SIMATIC S7-300 CPU 317F-2 PN/DP, SIMATIC S7-300 CPU 317T-3 PN/DP, SIMATIC S7-300 CPU 317TF-3 PN/DP, SIMATIC S7-300 CPU 319-3 PN/DP, SIMATIC S7-300 CPU 319F-3 PN/DP, SIMATIC S7-400 CPU 412-2 PN V7, SIMATIC S7-400 PN/DP V6 and below CPU family (incl. SIPLUS variants), SIMATIC WinAC RTX 2010, SIMATIC WinAC RTX F 2010, SIMOTION, SINAMICS DCM, SINAMICS DCP, SINAMICS G110M V4.7 Control Unit, SINAMICS G120 V4.7 Control Unit (incl. SIPLUS variants), SINAMICS G130 V4.7 Control Unit, SINAMICS G150 Control Unit, SINAMICS GH150 V4.7 Control Unit, SINAMICS GL150 V4.7 Control Unit, SINAMICS GM150 V4.7 Control Unit, SINAMICS S110 Control Unit, SINAMICS S120 V4.7 Control Unit and CBE20 (incl. SIPLUS variants), SINAMICS S150 Control Unit, SINAMICS SL150 V4.7 Control Unit, SINAMICS SM120 V4.7 Control Unit, SINUMERIK 828D, SINUMERIK 840D sl, SIPLUS ET 200S IM151-8 PN/DP CPU, SIPLUS ET 200S IM151-8F PN/DP CPU, SIPLUS S7-300 CPU 314C-2 PN/DP, SIPLUS S7-300 CPU 315-2 PN/DP, SIPLUS S7-300 CPU 315F-2 PN/DP, SIPLUS S7-300 CPU 317-2 PN/DP, SIPLUS S7-300 CPU 317F-2 PN/DP, SIPLUS S7-400 CPU 414-3 PN/DP V7, SIPLUS S7-400 CPU 416-3 PN/DP V7. 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.

The webserver of the affected devices contains a vulnerability that may lead to a denial of service condition. An attacker may cause a denial of service situation which leads to a restart of the webserver of the affected device. The security vulnerability could be exploited by an attacker with network access to the affected systems. Successful exploitation requires no system privileges and no user interaction. An attacker could use the vulnerability to compromise availability of the device.

A vulnerability has been identified in SIMATIC S7-300 CPUs (All versions < V3.X.16). The affected CPUs improperly validate S7 communication packets which could cause a Denial-of-Service condition of the CPU. The CPU will remain in DEFECT mode until manual restart. Successful exploitation requires an attacker to be able to send a specially crafted S7 communication packet to a communication interface of the CPU. This includes Ethernet, PROFIBUS, and Multi Point Interfaces (MPI). No user interaction or privileges are required to exploit the security vulnerability. The vulnerability could allow causing a Denial-of-Service condition of the core functionality of the CPU, compromising the availability of the system. At the time of advisory publication no public exploitation of this security vulnerability was known. Siemens confirms the security vulnerability and provides mitigations to resolve the security issue.

A vulnerability has been identified in SIMATIC CP 343-1 Advanced (incl. SIPLUS NET variant) (All versions < V3.0.53), SIMATIC CP 443-1 Advanced (incl. SIPLUS NET variant) (All versions < V3.2.17), SIMATIC S7-300 PN/DP CPU family (incl. SIPLUS variants) (All versions), SIMATIC S7-400 PN/DP CPU family (incl. SIPLUS variants) (All versions). The integrated web server delivers cookies without the "secure" flag. Modern browsers interpreting the flag would mitigate potential data leakage in case of clear text transmission.

A vulnerability has been identified in SIMATIC CP 343-1 Advanced (incl. SIPLUS NET variant) (All versions < V3.0.53), SIMATIC CP 443-1 Advanced (incl. SIPLUS NET variant) (All versions < V3.2.17), SIMATIC S7-300 PN/DP CPU family (incl. SIPLUS variants) (All versions), SIMATIC S7-400 PN/DP CPU family (incl. SIPLUS variants) (All versions). The integrated web server at port 80/TCP or port 443/TCP of the affected devices could allow remote attackers to perform actions with the permissions of an authenticated user, provided the targeted user has an active session and is induced to trigger the malicious request.

Siemens SIMATIC S7-300 Profinet-enabled CPU devices with firmware before 3.2.12 and SIMATIC S7-300 Profinet-disabled CPU devices with firmware before 3.3.12 allow remote attackers to cause a denial of service (defect-mode transition) via crafted (1) ISO-TSAP or (2) Profibus packets.