Buy a domain, get a cert, sell it: lcamtuf flags a free MITM path

OwariDa · x · 2026-09-15

Security researcher lcamtuf sketched a four-step trick that exposes a real risk: register a domain, obtain an HTTPS certificate for it, then sell the domain — the old certificate may keep working, handing the new owner a free man-in-the-middle channel. The takeaway: HTTPS alone doesn't guarantee you're talking to the current domain holder.

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