An issue was discovered in certain Apple products. iOS before 10.2 is affected. tvOS before 10.1 is affected. watchOS before 3.1.1 is affected. The issue involves the "Profiles" component. It allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted certificate profile.
https://support.apple.com/HT207487
https://support.apple.com/HT207425
https://support.apple.com/HT207422
https://lists.apple.com/archives/security-announce/2016/Dec/msg00001.html