SB2022052204 - Improper input validation in PocketMine-MP

Description

This security bulletin contains information about 1 vulnerability.

1) Improper input validation (CVE-ID: N/A)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 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/E:U/U:Green

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.

Remediation

Install update from vendor's website.

References

• https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-gj94-v4p9-w672
• https://github.com/advisories/GHSA-gj94-v4p9-w672