Unchecked validity of Facing values in PlayerActionPacket
### Impact A remote attacker may crash a server by sending `PlayerActionPacket` with invalid facing values (e.g. negative), specifically with `START_BREAK` or `CRACK_BLOCK` actions, or with a `UseItemTransactionData` (typically in `InventoryTransactionPacket`). ### Patches f126479c37ff00a717a828f5271cf8e821d12d6c ### Workarounds Using a plugin, cancel `DataPacketReceiveEvent` if the packet is `PlayerActionPacket` and the facing is outside the range 0-5 when receiving START_BREAK or CRACK_BLOCK actions, or UseItemTransactionData. However, beware that negative values may be legitimate in some cases. ### For more information If you have any questions or comments about this advisory: * Email us at [team@pmmp.io](mailto:team@pmmp.io)
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2022-51015US | medium6.5 | — | ||
PocketMine-MP before 4.0.6 does not validate facing values in PlayerActionPacket (for START_BREAK and CRACK_BREAK actions) or in UseItemTransactionData (typically within InventoryT… | ||||
references
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