PocketMine-MP has improperly handled dye colour IDs in banner NBT, leading to server crash
Impact
DyeColorIdMap->fromId() did not account for the possibility that it might be given invalid input. This means that an undefined offset error would occur whenever this happened.
This code is indirectly called during Banner->deserializeCompoundTag(), which is invoked when deserializing any item NBT, whether from network or disk.
An attacker could use this bug to crash a server by providing NBT with invalid values for pattern colours in an inventory transaction, or by using /give to obtain an item with NBT like this.
Patches
08b9495bce2d65a6d1d3eeb76e484499a00765eb
Workarounds
This is quite difficult to work around via a plugin. Theoretically, it's possible to override the Banner item class from a plugin and validate the data before it reaches deserializeCompoundTag().
For more information
If you have any questions or comments about this advisory:
- Email us at security@pmmp.io
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Paquete de Composer | pocketmine/pocketmine-mp | < 4.8.1 | 4.8.1 |
Referencias
- https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-wqqv-jcfr-9f5g
- https://github.com/pmmp/PocketMine-MP/commit/08b9495bce2d65a6d1d3eeb76e484499a00765eb
- https://github.com/pmmp/PocketMine-MP
- https://github.com/pmmp/PocketMine-MP/blob/38d6284671e8b657ba557e765a6c29b24a7705f5/src/item/Banner.php#L104
- Vector CVSS
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Debilidad (CWE)
-- Plataforma
- Composer
- Paquete
pocketmine/pocketmine-mp- Publicada
- 09.01.2023
- Actualizado
- 11.10.2026 10:22
Fuentes y licencias
OSV / GitHub Advisory Database - GHSA-wqqv-jcfr-9f5g - CC BY 4.0
Historial de vulnerabilidades: pocketmine/pocketmine-mp
Todas las vulnerabilidades publicadas de este paquete (Paquete de Composer), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 30
- Primera → última
- 11.2020 04.2026
- Sin corrección
- 0
- Explotada en ataques
- 0
Distribución por gravedad
- Alta 20
- Media 8
- Baja 2
Divulgaciones por año
- 2020: 1
- 2021: 1
- 2022: 11
- 2023: 8
- 2024: 2
- 2025: 2
- 2026: 5
-
PocketMine-MP has improperly handled dye colour IDs in banner NBT, leading to server crash esta entrada
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