The older one? Probably but I think the way it combined multiple overflows would have required a fairly advanced fuzzer, especially to look exploitable. The main point I had was that while fuzzing would have found interesting ways to crash ImageIO with PDFs, most people wouldn’t have expected that to be reachable without a click from iMessage. The relevant teams could have been rewriting everything they care about in Rust and this still would have happened because it was an obsolete usage of a format they don’t even use but which could be pulled in by the old GIF preview path.
I agree that most Lockdown mode features won’t be pulled in but looking at that list, note how many stop a NSO zero-click by adding a “have you ever interacted with this person?” filter to iMessage, FaceTime, HomeKit, etc. That makes me wonder whether a more polished UI might be acceptable to normal users where new numbers are basically text-only with warnings.
I agree that most Lockdown mode features won’t be pulled in but looking at that list, note how many stop a NSO zero-click by adding a “have you ever interacted with this person?” filter to iMessage, FaceTime, HomeKit, etc. That makes me wonder whether a more polished UI might be acceptable to normal users where new numbers are basically text-only with warnings.