CVE-2024-43438: Moodle/moodle Moodle's IDOR Vulnerability

MODERATE
Advisory Identifier: GHSA-p9cx-f595-h79h
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CVSS 7.5
CWE-639 CWE-863
Published
Advisory Summary

CVE-2024-43438 is a MODERATE (CVSS 7.5) moodle's idor vulnerability (CWE-639: Authorization Bypass Through User-Controlled Key) affecting Moodle/moodle libraries in the Packagist ecosystem. The issue involves moodle's idor in feedback non-respondents report allows messaging arbitrary site users. Remediation is available by upgrading affected packages to version 4.1.12, 4.2.9, 4.3.6, 4.4.2.

CVE-2024-43438 at a Glance

CVE Identifier CVE-2024-43438
GHSA Identifier GHSA-p9cx-f595-h79h
Severity MODERATE
CVSS v3.1 Base Score 7.5
CWE Classification CWE-639: Authorization Bypass Through User-Controlled Key
Affected Product Moodle/moodle
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:H/I:N/A:N).

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 High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2024-43438

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: 4.1.12 
Upgrade moodle/moodle to 4.1.12
moodle/moodle fixed: 4.2.9 
Upgrade moodle/moodle to 4.2.9
moodle/moodle fixed: 4.3.6 
Upgrade moodle/moodle to 4.3.6
moodle/moodle fixed: 4.4.2 
Upgrade moodle/moodle to 4.4.2
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-2024-43438, 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 4.1.12), 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-639: Authorization Bypass Through User-Controlled Key, where the system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. 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

A flaw was found in Feedback. Bulk messaging in the activity's non-respondents report did not verify message recipients belonging to the set of users returned by the report.

CVE-2024-43438 Affected Moodle/moodle Versions

4 component(s)
Fixed Versions:
4.1.124.2.94.3.64.4.2
Product / Package Ecosystem Affected Versions Fixed Version
moodle/moodle
 Packagist
< 4.1.12
4.1.12
moodle/moodle
 Packagist
≥ 4.2.0-beta
< 4.2.9
4.2.9
moodle/moodle
 Packagist
≥ 4.3.0-beta
< 4.3.6
4.3.6
moodle/moodle
 Packagist
≥ 4.4.0-beta
< 4.4.2
4.4.2

References

NVD — CVE-2024-43438 NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-43438
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2304267
Moodle/moodle Source Repository REPOSITORY
https://github.com/moodle/moodle
moodle.org/mod/forum/discuss.p... WEB
https://moodle.org/mod/forum/discuss.php?d=461208

Frequently Asked Questions

What is CVE-2024-43438?
CVE-2024-43438 is a security vulnerability in Moodle/moodle involving Moodle's IDOR in Feedback non-respondents report allows messaging arbitrary site users under CWE-639: Authorization Bypass Through User-Controlled Key.
Which Moodle/moodle versions are affected?
Affected versions include releases prior to 4.1.12, 4.2.9, 4.3.6, 4.4.2 across affected packages: moodle/moodle.
What version fixes CVE-2024-43438?
Upgrading to 4.1.12, 4.2.9, 4.3.6, 4.4.2 (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 4.1.12, 4.2.9, 4.3.6, 4.4.2. Upgrade your dependency to 4.1.12, 4.2.9, 4.3.6, 4.4.2 or later.
What is the CVSS score of CVE-2024-43438?
CVE-2024-43438 has a CVSS v3.1 base score of 7.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2024-43438?
CVE-2024-43438 is classified under CWE-639: Authorization Bypass Through User-Controlled Key (The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.).
How can I check Packagist dependencies for CVE-2024-43438?
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-p9cx-f595-h79h",
  "modified" : "2024-11-07T18:28:35Z",
  "published" : "2024-11-07T15:31:52Z",
  "aliases" : [ "CVE-2024-43438" ],
  "summary" : "Moodle's IDOR in Feedback non-respondents report allows messaging arbitrary site users",
  "details" : "A flaw was found in Feedback. Bulk messaging in the activity's non-respondents report did not verify message recipients belonging to the set of users returned by the report.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "moodle/moodle"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "4.1.12"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "moodle/moodle"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.2.0-beta"
      }, {
        "fixed" : "4.2.9"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "moodle/moodle"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.3.0-beta"
      }, {
        "fixed" : "4.3.6"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "moodle/moodle"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.4.0-beta"
      }, {
        "fixed" : "4.4.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-43438"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2304267"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/moodle/moodle"
  }, {
    "type" : "WEB",
    "url" : "https://moodle.org/mod/forum/discuss.php?d=461208"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-639", "CWE-863" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-11-07T18:28:35Z",
    "nvd_published_at" : "2024-11-07T14:15:16Z"
  }
}