Several major U.S. pipelines across the country reported data system blackouts after a third-party electronic communication system was attacked. The incident sheds light on the many vulnerabilities that utilities face. Pipelines usually have three ways to connect at any station, including a primary network, a backup network such as GPRS, microwave, or satellite and an array of insecure devices such as modems that are used in pipelines due to the large geographic distance. There is a critical need that all supply chain network providers that connect to your assets be held to the same high security standards, said security expert Bryan Singer.
Source: https://threatpost.com/insecure-scada-systems-blamed-in-rash-of-pipeline-data-network-attacks/130952/