pmmp/pocketmine-mp · Security
Unchecked validity of Facing values in PlayerActionPacket
- GHSA ID
- GHSA-xh99-hw7h-wf63
- Severity
- high
- Published
- Updated
- CVSS
- 7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS v3
- 7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Description
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
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