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Veritasium
The Internet Was Weeks Away From Disaster and No One Knew
In late March 2024 the internet came within weeks of catastrophe, and almost nobody outside a small circle of engineers noticed. A patient attacker operating under the name Jia Tan spent more than two years grooming his way into a tiny, beloved data compression tool called XZ, then planted a backdoor so surgically engineered that it would have handed him a master key to OpenSSH, the lock on essentially every Linux server on Earth.