About the security content of iOS 11.2.1
This document describes the security content of iOS 11.2.1.
About Apple security updates
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Apple security documents reference vulnerabilities by CVE-ID when possible.
iOS 11.2.1
HomeKit
Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation
Impact: A remote attacker may be able to unexpectedly alter application state
Description: A message handling issue was addressed with improved input validation.
CVE-2017-13903: Tian Zhang
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