A stealth attack came close to compromising the world’s computers

In 2020 XKCD, a popular online comic strip, published a cartoon depicting a teetering arrangement of blocks with the label: “all modern digital infrastructure”. Perched precariously at the bottom, holding everything up, was a lone, slender brick: “A project some random person in Nebraska has been thanklessly maintaining since 2003.” The illustration quickly became a cult classic among the technically minded, for it highlighted a harsh truth: the software at the heart of the internet is maintained not by giant corporations or sprawling bureaucracies but by a handful of earnest volunteers toiling in obscurity. A cyber-security scare in recent days shows how the result can be near-disaster.