GHSA-p62j-hrxm-xcxf: Pocketmine/pocketmine mp Book Page Text, Count, And Vulnerability

MODERATE
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CVSS 6.5
Published
Advisory Summary

GHSA-p62j-hrxm-xcxf is a MODERATE (CVSS 6.5) book page text, count, and vulnerability (General Security Weakness) affecting Pocketmine/pocketmine mp libraries in the Packagist ecosystem. The issue involves book page text, count, and author/title length is not limited in pocketmine-mp. Remediation is available by upgrading affected packages to version 3.26.5, 4.0.5.

GHSA-p62j-hrxm-xcxf at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-p62j-hrxm-xcxf
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification General Security Weakness
Affected Product Pocketmine/pocketmine mp
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 6.5

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

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
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-p62j-hrxm-xcxf

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: 3.26.5 
Upgrade pocketmine/pocketmine-mp to 3.26.5
pocketmine/pocketmine-mp fixed: 4.0.5 
Upgrade pocketmine/pocketmine-mp to 4.0.5
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-p62j-hrxm-xcxf, 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 3.26.5), 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 Players can fill book pages with as many characters as they like; the server does not check this. In addition, the maximum of 50 pages is also not enforced, meaning that players can create "book bombs". This causes a variety of problems: - Oversized NBT on the wire costing excess bandwidth for server and client - Server crashes when saving region-based worlds due to exceeding maximum chunk size of 1 MB (PM3-specific) - Server crashes if any book page exceeds 32 KiB (due to TAG_String size limit) (PM4-specific) This does, however, require that an attacker obtain a writable book in the first place in order to exploit the problem. ### Patches The bug has been fixed in 3.26.5 and 4.0.5. ### Workarounds Ban writable books, or use a plugin to cancel `PlayerEditBookEvent` to cancel the event if `strlen(text) > 1024 || mb_strlen(text) > 256`. ### For more information If you have any questions or comments about this advisory: * Email us at [team@pmmp.io](mailto:team@pmmp.io)

GHSA-p62j-hrxm-xcxf Affected Pocketmine/pocketmine mp Versions

2 component(s)
Fixed Versions:
3.26.54.0.5
Product / Package Ecosystem Affected Versions Fixed Version
pocketmine/pocketmine-mp
 Packagist
< 3.26.5
3.26.5
pocketmine/pocketmine-mp
 Packagist
≥ 4.0.0
< 4.0.5
4.0.5

References

GitHub Advisory / Wiki ADVISORY
https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-p62j-hrxm-xcxf
Pocketmine/pocketmine mp Source Repository REPOSITORY
https://github.com/pmmp/PocketMine-MP

Frequently Asked Questions

What is GHSA-p62j-hrxm-xcxf?
GHSA-p62j-hrxm-xcxf is a security vulnerability in Pocketmine/pocketmine mp involving Book page text, count, and author/title length is not limited in PocketMine-MP under General Security Weakness.
Which Pocketmine/pocketmine mp versions are affected?
Affected versions include releases prior to 3.26.5, 4.0.5 across affected packages: pocketmine/pocketmine-mp.
What version fixes GHSA-p62j-hrxm-xcxf?
Upgrading to 3.26.5, 4.0.5 (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 3.26.5, 4.0.5. Upgrade your dependency to 3.26.5, 4.0.5 or later.
What is the CVSS score of GHSA-p62j-hrxm-xcxf?
GHSA-p62j-hrxm-xcxf has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with GHSA-p62j-hrxm-xcxf?
GHSA-p62j-hrxm-xcxf is classified under General Security Weakness.
How can I check Packagist dependencies for GHSA-p62j-hrxm-xcxf?
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-p62j-hrxm-xcxf",
  "modified" : "2022-01-06T19:44:35Z",
  "published" : "2022-01-06T23:53:35Z",
  "aliases" : [ ],
  "summary" : "Book page text, count, and author/title length is not limited in PocketMine-MP",
  "details" : "### Impact\nPlayers can fill book pages with as many characters as they like; the server does not check this.\nIn addition, the maximum of 50 pages is also not enforced, meaning that players can create \"book bombs\".\n\nThis causes a variety of problems:\n- Oversized NBT on the wire costing excess bandwidth for server and client\n- Server crashes when saving region-based worlds due to exceeding maximum chunk size of 1 MB (PM3-specific)\n- Server crashes if any book page exceeds 32 KiB (due to TAG_String size limit) (PM4-specific)\n\nThis does, however, require that an attacker obtain a writable book in the first place in order to exploit the problem.\n\n### Patches\nThe bug has been fixed in 3.26.5 and 4.0.5.\n\n### Workarounds\nBan writable books, or use a plugin to cancel `PlayerEditBookEvent` to cancel the event if `strlen(text) > 1024 || mb_strlen(text) > 256`.\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Email us at [team@pmmp.io](mailto:team@pmmp.io)\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "pocketmine/pocketmine-mp"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.26.5"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "pocketmine/pocketmine-mp"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.0.0"
      }, {
        "fixed" : "4.0.5"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-p62j-hrxm-xcxf"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/pmmp/PocketMine-MP"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-01-06T19:44:35Z",
    "nvd_published_at" : null
  }
}