CVE-2024-38273: Moodle/moodle Moodle BigBlueButton Web Service Leaks Vulnerability

MODERATE
Advisory Identifier: GHSA-x29x-qwvx-fxr2
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CVSS 4.3
CWE-284
Published
Advisory Summary

CVE-2024-38273 is a MODERATE (CVSS 4.3) moodle bigbluebutton web service leaks vulnerability (CWE-284: Improper Access Control) affecting Moodle/moodle libraries in the Packagist ecosystem. The issue involves moodle bigbluebutton web service leaks meeting joining information. Remediation is available by upgrading affected packages to version 4.4.1, 4.3.5, 4.2.8, 4.1.11.

CVE-2024-38273 at a Glance

CVE Identifier CVE-2024-38273
GHSA Identifier GHSA-x29x-qwvx-fxr2
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-284: Improper Access Control
Affected Product Moodle/moodle
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 4.3

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:L/I:N/A:N).

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 Low (C:L)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2024-38273

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

moodle/moodle fixed: 4.4.1 
Upgrade moodle/moodle to 4.4.1
moodle/moodle fixed: 4.3.5 
Upgrade moodle/moodle to 4.3.5
moodle/moodle fixed: 4.2.8 
Upgrade moodle/moodle to 4.2.8
moodle/moodle fixed: 4.1.11 
Upgrade moodle/moodle to 4.1.11
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 moodle/moodle

How to Check if You Are Affected

To determine whether your application is affected by CVE-2024-38273, inspect your project dependencies for Moodle/moodle:

inspect dependencies for moodle/moodle

Analyze the terminal output to locate any version of Moodle/moodle in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.4.1), 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 CWE-284: Improper Access Control, where the product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. In Moodle/moodle, 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

Insufficient capability checks meant it was possible for users to gain access to BigBlueButton join URLs they did not have permission to access.

CVE-2024-38273 Affected Moodle/moodle Versions

4 component(s)
Fixed Versions:
4.4.14.3.54.2.84.1.11
Product / Package Ecosystem Affected Versions Fixed Version
moodle/moodle
 Packagist
≥ 4.4.0-beta
< 4.4.1
4.4.1
moodle/moodle
 Packagist
≥ 4.3.0-beta
< 4.3.5
4.3.5
moodle/moodle
 Packagist
≥ 4.2.0-beta
< 4.2.8
4.2.8
moodle/moodle
 Packagist
< 4.1.11
4.1.11

References

NVD — CVE-2024-38273 NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-38273
Security Fix Commit FIX COMMIT
https://github.com/moodle/moodle/commit/500cec575731fd8575569dcb5811535751dddae1
Security Fix Commit FIX COMMIT
https://github.com/moodle/moodle/commit/647b9dc06409211018c9f28581504d096ce9e3a8
Security Fix Commit FIX COMMIT
https://github.com/moodle/moodle/commit/6c0645ca29b195b5caaffc27d80f2ff715c33a48
Security Fix Commit FIX COMMIT
https://github.com/moodle/moodle/commit/a10506b8d70609478fef156d489e0c7d727b6098
Moodle/moodle Source Repository REPOSITORY
https://github.com/moodle/moodle
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/F7AZYR7EXV6E5SQE2GYTNQE3NOENJCQ6
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GHTIX55J4Q4LEOMLNEA4OZSWVEENQX7E
moodle.org/mod/forum/discuss.p... WEB
https://moodle.org/mod/forum/discuss.php?d=459498

Frequently Asked Questions

What is CVE-2024-38273?
CVE-2024-38273 is a security vulnerability in Moodle/moodle involving Moodle BigBlueButton web service leaks meeting joining information under CWE-284: Improper Access Control.
Which Moodle/moodle versions are affected?
Affected versions include releases prior to 4.4.1, 4.3.5, 4.2.8, 4.1.11 across affected packages: moodle/moodle.
What version fixes CVE-2024-38273?
Upgrading to 4.4.1, 4.3.5, 4.2.8, 4.1.11 (or the latest patched release for your respective branch) resolves the vulnerability.
Is moodle/moodle affected?
Yes, moodle/moodle is affected in releases prior to 4.4.1, 4.3.5, 4.2.8, 4.1.11. Upgrade your dependency to 4.4.1, 4.3.5, 4.2.8, 4.1.11 or later.
What is the CVSS score of CVE-2024-38273?
CVE-2024-38273 has a CVSS v3.1 base score of 4.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2024-38273?
CVE-2024-38273 is classified under CWE-284: Improper Access Control (The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.).
How can I check Packagist dependencies for CVE-2024-38273?
Run the dependency tree command: 'inspect dependencies for moodle/moodle'. 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-x29x-qwvx-fxr2",
  "modified" : "2024-11-05T18:34:16Z",
  "published" : "2024-06-18T21:30:36Z",
  "aliases" : [ "CVE-2024-38273" ],
  "summary" : "Moodle BigBlueButton web service leaks meeting joining information",
  "details" : "Insufficient capability checks meant it was possible for users to gain access to BigBlueButton join URLs they did not have permission to access.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"
  } ],
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    },
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      }, {
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      } ]
    } ]
  }, {
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    "ranges" : [ {
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    },
    "ranges" : [ {
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      }, {
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    } ]
  }, {
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    "ranges" : [ {
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      }, {
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      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-38273"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/moodle/moodle/commit/500cec575731fd8575569dcb5811535751dddae1"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/moodle/moodle/commit/647b9dc06409211018c9f28581504d096ce9e3a8"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/moodle/moodle/commit/6c0645ca29b195b5caaffc27d80f2ff715c33a48"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/moodle/moodle/commit/a10506b8d70609478fef156d489e0c7d727b6098"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/moodle/moodle"
  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/F7AZYR7EXV6E5SQE2GYTNQE3NOENJCQ6"
  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GHTIX55J4Q4LEOMLNEA4OZSWVEENQX7E"
  }, {
    "type" : "WEB",
    "url" : "https://moodle.org/mod/forum/discuss.php?d=459498"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-284" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-06-18T22:02:50Z",
    "nvd_published_at" : "2024-06-18T20:15:13Z"
  }
}