GHSA-fm35-jgg3-3grx
NaN/INF in serverbound movement packets can crash clients and servers
Quick fix
GHSA-fm35-jgg3-3grx — pocketmine/pocketmine-mp: upgrade to the fixed version with the command below.
composer require pocketmine/pocketmine-mp:^3.18.1Details
### Impact A malicious client may send a `MovePlayerPacket` to the server whose position or rotation contains NaN or INF. Since neither the server nor vanilla client handles this properly, a number of interesting side effects come into play.
- The server may crash in various ways if this exploit is used, because some mathematical operations on NaN/INF generate PHP warnings, which are converted into exceptions. - Clients may not be able to see other clients who have a NaN/INF rotation. - Clients may also crash in such cases.
### Patches A patch for this was included in the 3.18.1 release: https://github.com/pmmp/PocketMine-MP/commit/fb20bb38327b4c08ee3976640cd0dd547388a638
### Workarounds Workarounds could be implemented as plugins using `DataPacketReceiveEvent` to block any inbound movement packets containing bogus values.
### For more information If you have any questions or comments about this advisory:
- Open an issue in [pmmp/PocketMine-MP](https://github.com/pmmp/PocketMine-MP) - Email us at [team@pmmp.io](mailto:team@pmmp.io)
Are you affected?
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Affected packages
0Fixed in: 3.18.1composer require pocketmine/pocketmine-mp:^3.18.1