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🐘 Packagist

GHSA-xc7j-wj36-qjfr

HIGH

PocketMine-MP BookEditPacket crash when inventory slot in the packet is invalid

Published
Mar 6, 2024
Updated
Dec 4, 2024
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed

Blast Radius

1 pkg affected
🐘pocketmine/pocketmine-mp

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

Summary

If a client sends a BookEditPacket with InventorySlot greater than 35, the server will crash due to an unhandled exception thrown by BaseInventory->getItem().

Details

Crashes at https://github.com/pmmp/PocketMine-MP/blob/b744e09352a714d89220719ab6948a010ac636fc/src/network/mcpe/handler/InGamePacketHandler.php#L873

PoC

Using Gophertunnel, use serverConn.WritePacket(&packet.BookEdit{InventorySlot: 36})

Impact

Server crash, all servers

Patched versions

This issue was fixed by 47f011966092f275cc1b11f8de635e89fd9651a7, and the fix was released in 5.11.2.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistpocketmine/pocketmine-mpall versions5.11.2

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for pocketmine/pocketmine-mp. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

  2. Fix

    Update pocketmine/pocketmine-mp to 5.11.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-xc7j-wj36-qjfr is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

  4. How O3 protects you

    O3 pinpoints whether GHSA-xc7j-wj36-qjfr is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-xc7j-wj36-qjfr. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

### Summary If a client sends a BookEditPacket with InventorySlot greater than 35, the server will crash due to an unhandled exception thrown by `BaseInventory->getItem()`. ### Details Crashes at https://github.com/pmmp/PocketMine-MP/blob/b744e09352a714d89220719ab6948a010ac636fc/src/network/mcpe/handler/InGamePacketHandler.php#L873 ### PoC Using Gophertunnel, use `serverConn.WritePacket(&packet.BookEdit{InventorySlot: 36})` ### Impact Server crash, all servers ### Patched versions This issue was fixed by 47f011966092f275cc1b11f8de635e89fd9651a7, and the fix was released in 5.11.2.
O3 Security · Impact-Aware SCA

Is GHSA-xc7j-wj36-qjfr in your dependencies?

O3 detects GHSA-xc7j-wj36-qjfr across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.