An issue in the handling of group membership was resolved with improved logic. This issue is fixed in iOS 15.2 and iPadOS 15.2, watchOS 8.3, macOS Monterey 12.1. A malicious user may be able to leave a messages group but continue to receive messages in that group.
Weakness
According to WASC, “Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization.”
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Ipados | Apple | * | 15.2 (excluding) |
| Iphone_os | Apple | * | 15.2 (excluding) |
| Macos | Apple | 12.0.0 (including) | 12.1 (excluding) |
| Watchos | Apple | * | 8.3 (excluding) |