Siemens SIMATIC S7-300 CPU devices allow remote attackers to cause a denial of service (defect-mode transition) via crafted packets on (1) TCP port 102 or (2) Profibus.
https://github.com/Mewtwoz/n-days-poc-benchmark-and-dataset
https://ics-cert.us-cert.gov/advisories/ICSA-15-064-04
https://euvd.enisa.europa.eu/vulnerability/EUVD-2015-2285
https://cert-portal.siemens.com/productcert/pdf/ssa-987029.pdf
http://www.siemens.com/innovation/pool/de/forschungsfelder/siemens_security_advisory_ssa-987029.pdf