An issue was discovered in certain Apple products. iOS before 10.2 is affected. Safari before 10.0.2 is affected. iCloud before 6.1 is affected. iTunes before 12.5.4 is affected. The issue involves the "WebKit" component, which allows remote attackers to obtain sensitive information via crafted JavaScript prompts on a web site.
https://support.apple.com/HT207427
https://support.apple.com/HT207424
https://support.apple.com/HT207422
https://support.apple.com/HT207421
https://security.gentoo.org/glsa/201706-15