Vulnerability CVE-2019-19300

A vulnerability has been identified in KTK ATE530S (All versions), SIDOOR ATD430W (All versions), SIDOOR ATE530S COATED (All versions), SIDOOR ATE531S (All versions), SIMATIC ET 200SP Interfacemodul IM 155-6 MF HF (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 ET200MP IM155-5 PN HF (incl. SIPLUS variants) (All versions >= V4.2), 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/PN Coupler (incl. SIPLUS NET variants) (All versions >= V4.2), 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 family (incl. related ET200 CPUs and SIPLUS variants) (All versions), SIMATIC S7-400 PN/DP V7 and below CPU family (incl. SIPLUS variants) (All versions), SIMATIC S7-410 CPU family (incl. SIPLUS variants) (All versions), SIMATIC TDC CP51M1 (All versions), SIMATIC TDC CPU555 (All versions), SIMATIC WinAC RTX (F) 2010 (All versions), SINAMICS S/G Control Unit w. PROFINET (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.