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Behind the Scenes with iOS Security

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Hardened WebKit JIT Mapping<br />

<strong>iOS</strong> 10<br />

Write-anywhere primitive now insufficient for arbitrary code execution<br />

Attacker must subvert control flow via ROP or o<strong>the</strong>r means or find a way to call executeonly<br />

JIT write function<br />

Mitigation increases complexity of exploiting WebKit memory corruption bugs

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