Jamie Bishop

**Name of the Vulnerable Software and Affected Versions** macOS versions prior to 10.14.5 Security Update versions prior to 2019-003 High Sierra Security Update versions prior to 2019-003 Sierra iOS versions prior to 12.3 tvOS versions prior to 12.3 **Description** A logic issue was addressed with improved state management. Users removed from an iMessage conversation may still be able to alter state. **Recommendations** For macOS versions prior to 10.14.5, update to macOS Mojave 10.14.5. For Security Update versions prior to 2019-003 High Sierra, apply Security Update 2019-003 High Sierra. For Security Update versions prior to 2019-003 Sierra, apply Security Update 2019-003 Sierra. For iOS versions prior to 12.3, update to iOS 12.3. For tvOS versions prior to 12.3, update to tvOS 12.3.

**Name of the Vulnerable Software and Affected Versions** iOS versions prior to 13.3.1 iPadOS versions prior to 13.3.1 **Description** The issue allows users removed from an iMessage conversation to potentially alter state. This is due to inadequate checks that have been improved in the fixed versions. **Recommendations** For iOS versions prior to 13.3.1, update to iOS 13.3.1 to resolve the issue. For iPadOS versions prior to 13.3.1, update to iPadOS 13.3.1 to resolve the issue.