CVE-2016-3949 (simatic_s7-300_with_profitnet_support_firmware, simatic_s7-300_without_profitnet_support_firmware)
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.