SB2022010432 - Multiple vulnerabilities in PocketMine-MP

Description

This security bulletin contains information about 2 vulnerabilities.

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:H/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 skin data fields when processing player-supplied skin data. A remote attacker can submit oversized skin fields to cause a denial of service.

The server crashes when saving player data if affected string fields exceed the 32767-byte limit for TAG_String values.

2) 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:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote user to cause a denial of service.

The vulnerability exists due to improper input validation in book page text, page count, and author/title fields when processing edited book data. A remote user can submit a crafted writable book to cause a denial of service.

Exploitation requires obtaining a writable book.

Remediation

Install update from vendor's website.

References

• https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-c6fg-99pr-25m9
• https://github.com/advisories/GHSA-c6fg-99pr-25m9
• https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-p62j-hrxm-xcxf