CVE-2023-28334: Moodle/moodle Moodle May Allow Authenticated Users Vulnerability

MODERATE
Advisory Identifier: GHSA-hh52-g5c4-wprh
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CVSS 4.3
CWE-639 CWE-200
Published
Advisory Summary

CVE-2023-28334 is a MODERATE (CVSS 4.3) moodle may allow authenticated users vulnerability (CWE-639: Authorization Bypass Through User-Controlled Key) affecting Moodle/moodle libraries in the Packagist ecosystem. The issue involves moodle may allow authenticated users to enumerate other user's names via learning plans page. Remediation is available by upgrading affected packages to version 4.1.2, 4.0.7, 3.11.13, 3.9.20.

CVE-2023-28334 at a Glance

CVE Identifier CVE-2023-28334
GHSA Identifier GHSA-hh52-g5c4-wprh
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-639: Authorization Bypass Through User-Controlled Key
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-2023-28334

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: 4.1.2 
Upgrade moodle/moodle to 4.1.2
moodle/moodle fixed: 4.0.7 
Upgrade moodle/moodle to 4.0.7
moodle/moodle fixed: 3.11.13 
Upgrade moodle/moodle to 3.11.13
moodle/moodle fixed: 3.9.20 
Upgrade moodle/moodle to 3.9.20
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-2023-28334, 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 4.1.2), 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

Authenticated users were able to enumerate other users' names via the learning plans page.

CVE-2023-28334 Affected Moodle/moodle Versions

4 component(s)
Fixed Versions:
4.1.24.0.73.11.133.9.20
Product / Package Ecosystem Affected Versions Fixed Version
moodle/moodle
 Packagist
≥ 4.1.0
< 4.1.2
4.1.2
moodle/moodle
 Packagist
≥ 4.0.0
< 4.0.7
4.0.7
moodle/moodle
 Packagist
≥ 3.11.0
< 3.11.13
3.11.13
moodle/moodle
 Packagist
< 3.9.20
3.9.20

References

NVD — CVE-2023-28334 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-28334
Security Fix Commit FIX COMMIT
https://github.com/moodle/moodle/commit/0e3c8eb740e1e49a62a5f452cda7e06258712bbf
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2179423
git.moodle.org/gw WEB
https://git.moodle.org/gw?p=moodle.git;a=commit;h=0e3c8eb740e1e49a62a5f452cda7e06258712bbf
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=445066

Frequently Asked Questions

What is CVE-2023-28334?
CVE-2023-28334 is a security vulnerability in Moodle/moodle involving Moodle may allow authenticated users to enumerate other user's names via learning plans page under CWE-639: Authorization Bypass Through User-Controlled Key.
Which Moodle/moodle versions are affected?
Affected versions include releases prior to 4.1.2, 4.0.7, 3.11.13, 3.9.20 across affected packages: moodle/moodle.
What version fixes CVE-2023-28334?
Upgrading to 4.1.2, 4.0.7, 3.11.13, 3.9.20 (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 4.1.2, 4.0.7, 3.11.13, 3.9.20. Upgrade your dependency to 4.1.2, 4.0.7, 3.11.13, 3.9.20 or later.
What is the CVSS score of CVE-2023-28334?
CVE-2023-28334 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-2023-28334?
CVE-2023-28334 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-2023-28334?
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-hh52-g5c4-wprh",
  "modified" : "2024-04-19T15:30:46Z",
  "published" : "2023-03-23T21:30:18Z",
  "aliases" : [ "CVE-2023-28334" ],
  "summary" : "Moodle may allow authenticated users to enumerate other user's names via learning plans page",
  "details" : "Authenticated users were able to enumerate other users' names via the learning plans page.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "moodle/moodle"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.1.0"
      }, {
        "fixed" : "4.1.2"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "moodle/moodle"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.0.0"
      }, {
        "fixed" : "4.0.7"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "moodle/moodle"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.11.0"
      }, {
        "fixed" : "3.11.13"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "moodle/moodle"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.9.20"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-28334"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/moodle/moodle/commit/0e3c8eb740e1e49a62a5f452cda7e06258712bbf"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2179423"
  }, {
    "type" : "WEB",
    "url" : "https://git.moodle.org/gw?p=moodle.git;a=commit;h=0e3c8eb740e1e49a62a5f452cda7e06258712bbf"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/moodle/moodle"
  }, {
    "type" : "WEB",
    "url" : "https://moodle.org/mod/forum/discuss.php?d=445066"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200", "CWE-639" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-03-23T23:09:19Z",
    "nvd_published_at" : "2023-03-23T21:15:00Z"
  }
}