CVE-2023-54355 PocketMine-MP 5.2.0 Server Crash via Incorrect EC Curve
Attackers can crash the PocketMine-MP server by sending login packets with invalid elliptic curve keys, causing an uncaught exception.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-54355?
CVE-2023-54355 is a high-severity denial of service vulnerability in pmmp PocketMine-MP, published on 9 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
PocketMine-MP versions before 5.3.1 and 4.23.1 fail to validate that the identityPublicKey in LoginPacket uses the required secp384r1 elliptic curve. Attackers can provide LoginPackets with keys using different curves or non-EC key types to pass login verification but trigger an uncaught exception during ECDH key derivation, crashing the server.
Weakness: CWE-347
Which versions are affected by CVE-2023-54355?
2 open source packages ship an affected version, including pocketmine/pocketmine-mp.
| Package | Affected | Fixed in |
|---|---|---|
pocketmine/pocketmine-mp Packagist | From 5.2.0 | 5.3.1 |
pocketmine/pocketmine-mp Packagist | From 5.2.0 | 5.3.1 |
How do I fix CVE-2023-54355?
Upgrade pocketmine/pocketmine-mp to 5.3.1 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-54355 being exploited?
There is no known exploitation of CVE-2023-54355 in the wild and no public exploit code.
Sources
Also known as GHSA-79rc-jjh6-rc89, GHSA-7j9c-9c4f-5ff9.