Around 1,400 passengers were temporarily stranded at Warsaw s Chopin airport over the weekend after hackers were purportedly able to modify an entire airline s flight plans via a distributed denial of service (DDoS) attack. Many passengers were able to board the flights later in the day and regular service was resumed Monday according to LOT spokesman Adrian Kubicki. The airline insists that at no point was the safety of any ongoing flights at risk, nor were any other airports affected, but stressed that the attack could be a sign of things to come.
Source: https://threatpost.com/polish-planes-grounded-after-airline-hit-with-ddos-attack/113412/