An issue was discovered in certain Apple products. iOS before 11.3 is affected. Safari before 11.1 is affected. iCloud before 7.4 on Windows is affected. iTunes before 12.7.4 on Windows is affected. tvOS before 11.3 is affected. watchOS before 4.3 is affected. The issue involves the “WebKit” component. It allows attackers to cause a denial of service (memory corruption) via a crafted web site.

Multiple memory corruption issues were addressed with improved memory handling. This issue affected versions prior to iOS 11.3, tvOS 11.3, watchOS 4.3, Safari 11.1, iTunes 12.7.4 for Windows, iCloud for Windows 7.4.

An issue was discovered in certain Apple products. iOS before 11.3 is affected. macOS before 10.13.4 is affected. iCloud before 7.4 on Windows is affected. iTunes before 12.7.4 on Windows is affected. tvOS before 11.3 is affected. watchOS before 4.3 is affected. The issue involves the “Security” component. A buffer overflow allows attackers to execute arbitrary code in a privileged context via a crafted app.

An issue was discovered in certain Apple products. iOS before 11.3 is affected. macOS before 10.13.4 is affected. tvOS before 11.3 is affected. watchOS before 4.3 is affected. The issue involves the “Kernel” component. It allows attackers to execute arbitrary code in a privileged context or cause a denial of service (memory corruption) via a crafted app.

An issue was discovered in certain Apple products. iOS before 11.3 is affected. macOS before 10.13.4 is affected. tvOS before 11.3 is affected. watchOS before 4.3 is affected. The issue involves the “CoreText” component. It allows remote attackers to cause a denial of service (application crash) via a crafted string.

An issue was discovered in certain Apple products. macOS before 10.13.5 is affected. The issue involves the “Intel Graphics Driver” component. It allows attackers to bypass intended memory-read restrictions via a crafted app.