GHSA-79rc-jjh6-rc89: Pocketmine/pocketmine mp PocketMine-MP Server Crash Due To Vulnerability

HIGH
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CVSS 7.5
Published
Advisory Summary

GHSA-79rc-jjh6-rc89 is a HIGH (CVSS 7.5) pocketmine-mp server crash due to vulnerability (General Security Weakness) affecting Pocketmine/pocketmine mp libraries in the Packagist ecosystem. The issue involves pocketmine-mp server crash due to incorrect ec curve used for loginpacket identitypublickey. Remediation is available by upgrading affected packages to version 5.3.1.

GHSA-79rc-jjh6-rc89 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-79rc-jjh6-rc89
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification General Security Weakness
Affected Product Pocketmine/pocketmine mp
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix GHSA-79rc-jjh6-rc89

To remediate this vulnerability, upgrade all affected Pocketmine/pocketmine mp dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

pocketmine/pocketmine-mp fixed: 5.3.1 
Upgrade pocketmine/pocketmine-mp to 5.3.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for pocketmine/pocketmine-mp

How to Check if You Are Affected

To determine whether your application is affected by GHSA-79rc-jjh6-rc89, inspect your project dependencies for Pocketmine/pocketmine mp:

inspect dependencies for pocketmine/pocketmine-mp

Analyze the terminal output to locate any version of Pocketmine/pocketmine mp in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 5.3.1), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under General Security Weakness. In Pocketmine/pocketmine mp, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact The server uses ECDH to calculate a shared secret for the symmetric encryption key used to encrypt network packets after logging in. ECDH requires that the keys used must both belong to the same elliptic curve. In Minecraft: Bedrock Edition, the curve used is `secp384r1`. Using any other curve (for example `secp256r1`) to sign the `LoginPacket` JWTs would lead to successfully verifying the login chain, but would later crash due to an uncaught exception during ECDH key derivation due to the client-provided key belonging to a different curve than the server's key. It's also theoretically possible that a non-EC key could be used (e.g. RSA or DH), which would also pass login verification as long as SHA384 hashing algorithm was used for the JWT signatures, and also lead to a crash. ### Patches The problem was fixed in 4.23.1 and 5.3.1 in the following commit: 4e646d19a4a1e0d082bd4d1f5a58ae0182a268d9 While 4.x would not have crashed when this was encountered, the faulty validation code has also been corrected there. ### Workarounds A plugin could handle `LoginPacket` and check that all of the `identityPublicKey`s provided in the JWT bodies actually belong to `secp384r1`. This can be checked by verifying that `openssl_pkey_get_details($key)["ec"]["curve_name"]` is set and equal to `secp384r1`. Beware that this element may not exist if the key is not an EC key at all.

GHSA-79rc-jjh6-rc89 Affected Pocketmine/pocketmine mp Versions

1 component(s)
Fixed Versions:
5.3.1
Product / Package Ecosystem Affected Versions Fixed Version
pocketmine/pocketmine-mp
 Packagist
≥ 5.2.0
< 5.3.1
5.3.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-79rc-jjh6-rc89
Security Fix Commit FIX COMMIT
https://github.com/pmmp/PocketMine-MP/commit/4e646d19a4a1e0d082bd4d1f5a58ae0182a268d9
Pocketmine/pocketmine mp Source Repository REPOSITORY
https://github.com/pmmp/PocketMine-MP

Frequently Asked Questions

What is GHSA-79rc-jjh6-rc89?
GHSA-79rc-jjh6-rc89 is a security vulnerability in Pocketmine/pocketmine mp involving PocketMine-MP server crash due to incorrect EC curve used for LoginPacket identityPublicKey under General Security Weakness.
Which Pocketmine/pocketmine mp versions are affected?
Affected versions include releases prior to 5.3.1 across affected packages: pocketmine/pocketmine-mp.
What version fixes GHSA-79rc-jjh6-rc89?
Upgrading to 5.3.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is pocketmine/pocketmine-mp affected?
Yes, pocketmine/pocketmine-mp is affected in releases prior to 5.3.1. Upgrade your dependency to 5.3.1 or later.
What is the CVSS score of GHSA-79rc-jjh6-rc89?
GHSA-79rc-jjh6-rc89 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with GHSA-79rc-jjh6-rc89?
GHSA-79rc-jjh6-rc89 is classified under General Security Weakness.
How can I check Packagist dependencies for GHSA-79rc-jjh6-rc89?
Run the dependency tree command: 'inspect dependencies for pocketmine/pocketmine-mp'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-79rc-jjh6-rc89",
  "modified" : "2023-09-14T17:10:01Z",
  "published" : "2023-09-14T17:10:01Z",
  "aliases" : [ ],
  "summary" : "PocketMine-MP server crash due to incorrect EC curve used for LoginPacket identityPublicKey",
  "details" : "### Impact\nThe server uses ECDH to calculate a shared secret for the symmetric encryption key used to encrypt network packets after logging in. ECDH requires that the keys used must both belong to the same elliptic curve. In Minecraft: Bedrock Edition, the curve used is `secp384r1`.\n\nUsing any other curve (for example `secp256r1`) to sign the `LoginPacket` JWTs would lead to successfully verifying the login chain, but would later crash due to an uncaught exception during ECDH key derivation due to the client-provided key belonging to a different curve than the server's key. It's also theoretically possible that a non-EC key could be used (e.g. RSA or DH), which would also pass login verification as long as SHA384 hashing algorithm was used for the JWT signatures, and also lead to a crash.\n\n### Patches\nThe problem was fixed in 4.23.1 and 5.3.1 in the following commit: 4e646d19a4a1e0d082bd4d1f5a58ae0182a268d9\nWhile 4.x would not have crashed when this was encountered, the faulty validation code has also been corrected there.\n\n### Workarounds\nA plugin could handle `LoginPacket` and check that all of the `identityPublicKey`s provided in the JWT bodies actually belong to `secp384r1`. This can be checked by verifying that `openssl_pkey_get_details($key)[\"ec\"][\"curve_name\"]` is set and equal to `secp384r1`. Beware that this element may not exist if the key is not an EC key at all.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "pocketmine/pocketmine-mp"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "5.2.0"
      }, {
        "fixed" : "5.3.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-79rc-jjh6-rc89"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pmmp/PocketMine-MP/commit/4e646d19a4a1e0d082bd4d1f5a58ae0182a268d9"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/pmmp/PocketMine-MP"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-09-14T17:10:01Z",
    "nvd_published_at" : null
  }
}