SB2023091373 - 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 LoginPacket identityPublicKey handling when processing login packets containing a public key on an incorrect elliptic curve or a non-EC key. A remote attacker can send a specially crafted login packet to cause a denial of service.

The issue is triggered after the login chain is successfully verified, when ECDH key derivation encounters a client-provided key that does not belong to the server's curve.

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: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 LoginPacket processing when parsing malformed JWT JSON. A remote attacker can send a specially crafted LoginPacket to cause a denial of service.

The issue is related to acceptance of NULL values in arrays whose types do not expect NULL.

Remediation

Install update from vendor's website.

References

• https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-79rc-jjh6-rc89
• https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-92jh-gwch-jq38