A parsing vulnerability for the MessageSet type in the ProtocolBuffers versions prior to and including 3.16.1, 3.17.3, 3.18.2, 3.19.4, 3.20.1 and 3.21.5 for protobuf-cpp, and versions prior to and including 3.16.1, 3.17.3, 3.18.2, 3.19.4, 3.20.1 and 4.21.5 for protobuf-python can lead to out of memory failures. A specially crafted message with multiple key-value per elements creates parsing issues, and can lead to a Denial of Service against services receiving unsanitized input. We recommend upgrading to versions 3.18.3, 3.19.5, 3.20.2, 3.21.6 for protobuf-cpp and 3.18.3, 3.19.5, 3.20.2, 4.21.6 for protobuf-python. Versions for 3.16 and 3.17 are no longer updated.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Protobuf-cpp | * | 3.18.3 (excluding) | |
| Protobuf-cpp | 3.19.0 (including) | 3.19.5 (excluding) | |
| Protobuf-cpp | 3.20.0 (including) | 3.20.2 (excluding) | |
| Protobuf-cpp | 3.21.0 (including) | 3.21.6 (excluding) | |
| Protobuf-python | * | 3.18.3 (excluding) | |
| Protobuf-python | 3.19.0 (including) | 3.19.5 (excluding) | |
| Protobuf-python | 3.20.0 (including) | 3.20.2 (excluding) | |
| Protobuf-python | 4.0.0 (including) | 4.21.6 (excluding) |