An issue was discovered in certain Apple products. iOS before 11.1 is affected. macOS before 10.13.1 is affected. tvOS before 11.1 is affected. watchOS before 4.1 is affected. The issue involves the "StreamingZip" component. It allows remote attackers to write to unintended pathnames via a crafted ZIP archive.
https://support.apple.com/HT208222
https://support.apple.com/HT208221
https://support.apple.com/HT208220