Improper input validation in PocketMine-MP - #VU125409
Published: May 22, 2022 / Updated: April 8, 2026
Vulnerability identifier: #VU125409
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper input validation in chat message processing when handling large chat messages containing many newline characters. A remote attacker can send a specially crafted chat packet to cause a denial of service.
The issue is triggered because incoming chat message blobs are split on newline characters and the total message length is not checked before parsing.
Affected software
PocketMine-MP
Remediation
Install security update from vendor's website.
PocketMine-MP - update to 4.2.10