Vulnerability-Lookup

GHSA-46C5-PFJ8-FV65

Vulnerability from github – Published: 2022-03-18 22:36 – Updated: 2025-12-26 17:29

Summary

Improperly checked metadata on tools/armour itemstacks received from the client

Details

Impact

Due to a workaround applied in 1.13, an attacker may send a negative damage/meta value in a tool or armour item's NBT, which TypeConverter then blindly uses as if it was valid without being checked.

When this invalid metadata value reaches Durable->setDamage(), an exception is thrown because the metadata is not within the expected range for damage values.

This can be reproduced with either a too-large damage value, or a negative one.

Patches

c8e1cfcbee4945fd4b63d2a7e96025c59744d4f1

Workarounds

In theory this can be checked by plugins using a custom TypeConverter, but this is likely to be very cumbersome.

For more information

Email us at team@pmmp.io

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "pocketmine/pocketmine-mp"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-704"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-03-18T22:36:03Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Impact\nDue to a workaround applied in 1.13, an attacker may send a negative damage/meta value in a tool or armour item\u0027s NBT, which `TypeConverter` then blindly uses as if it was valid without being checked.\n\nWhen this invalid metadata value reaches `Durable-\u003esetDamage()`, an exception is thrown because the metadata is not within the expected range for damage values.\n\nThis can be reproduced with either a too-large damage value, or a negative one.\n\n### Patches\nc8e1cfcbee4945fd4b63d2a7e96025c59744d4f1\n\n### Workarounds\nIn theory this can be checked by plugins using a custom `TypeConverter`, but this is likely to be very cumbersome.\n\n### For more information\n* Email us at [team@pmmp.io](mailto:team@pmmp.io)",
  "id": "GHSA-46c5-pfj8-fv65",
  "modified": "2025-12-26T17:29:39Z",
  "published": "2022-03-18T22:36:03Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-46c5-pfj8-fv65"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pmmp/PocketMine-MP/commit/c8e1cfcbee4945fd4b63d2a7e96025c59744d4f1"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/pmmp/PocketMine-MP"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Improperly checked metadata on tools/armour itemstacks received from the client"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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