On October 8, Ubuntu developer Canonical confirmed on the Ubuntu Discourse forum that its websites were under a sustained DDoS attack and that some services might be unreachable at times1. According to OMG! Ubuntu, as cited by SecurityWeek, the disruption hit Canonical's primary web properties: ubuntu.com, canonical.com, the Ubuntu blog and developer site, and Ubuntu's security advisory pages and API1. Launchpad and the Snap Store did not appear to be affected; OMG! Ubuntu put total downtime at a little over four hours1. On October 9, Canonical said most services were accessible again, though restoration was still under way1. Open questions: the company has not disclosed the attack's size or origin, no one appears to have claimed responsibility, and it is unclear whether it is linked to a more disruptive April attack that left some users unable to install updates1. Editorial inference, not a source claim: because security advisory pages were affected this time1, access to them may be temporarily lost during similar outages.

  1. [1] Canonical Websites Disrupted in Second DDoS Attack This YearSecurityWeek