Companies like Zerodium will purchase them, but widespread use of such vulnerabilities "burns" them, making it more likely that Apple will learn of their existence and apply fixes. The difficulty with infecting an iPhone is that it requires some kind of zero-day vulnerability (i.e., unknown to the security community at time of its release), and these vulnerabilities can be worth $1 million or more on the open market. A classic example of the latter was the case of Ahmed Mansoor, in which he was targeted with a text message in an attempt to infect his phone with the NSO's malware, now referred to as Trident. Historically, iOS has never been completely free of malware, but it has mostly been limited to one of two scenarios: Either you jailbroke your device, hacking it to remove the security restrictions and installing something malicious as a result, or you were the target of a nation-state adversary. These sites, which see thousands of visitors per week, were used to distribute iOS malware over a two-year period. According to Beer, a small set of websites had been hacked in February and were being used to attack iPhones, infecting them with malware. A post by Ian Beer of Google Project Zero released late yesterday evening sent the security community reeling.
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