PocketMine-MP before 5.41.1 contains a denial of service vulnerability in LoginPacket processing where large or complex structures in unknown clientData JWT properties cause excessive logging without sanitization. Attackers can send crafted LoginPackets with deeply nested or massive object structures to trigger out-of-memory conditions and crash the server.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
References 3
https://github.com/pmmp/PocketMine-MP/commit/87d1c0cea09d972fd4c2fafb84dac2ecab…
disclosure@vulncheck.com
https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-h6rj-3m53-887h
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/pocketmine-mp-before-5.41.1-logdos-via-log…
disclosure@vulncheck.com