Mac and Windows users infected by software updates delivered over hacked ISP | Ars Technica
Because the update mechanisms didn’t use TLS or cryptographic signatures to authenticate the connections or downloaded software, the threat actors were able to use their control of the ISP infrastructure to successfully perform machine-in-the-middle (MitM) attacks that directed targeted users to hostile servers rather than the ones operated by the affected software makers. These redirections worked even when users employed non-encrypted public DNS services such as Google’s 8.8.8.8 or Cloudflare’s 1.1.1.1 rather than the authoritative DNS server provided by the ISP
