CVE-2015-5267: Moodle/moodle Moodle Uses Predictable Password-recovery Tokens Vulnerability

HIGH
Advisory Identifier: GHSA-382v-gxj9-ffhc
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CVSS 7.5
CWE-200
Published
Advisory Summary

CVE-2015-5267 is a HIGH (CVSS 7.5) moodle uses predictable password-recovery tokens vulnerability (CWE-200: Exposure of Sensitive Information to an Unauthorized Actor) affecting Moodle/moodle libraries in the Packagist ecosystem. The issue involves moodle uses predictable password-recovery tokens. Remediation is available by upgrading affected packages to version 2.7.10, 2.8.8, 2.9.2.

CVE-2015-5267 at a Glance

CVE Identifier CVE-2015-5267
GHSA Identifier GHSA-382v-gxj9-ffhc
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
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:3.0/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-2015-5267

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: 2.7.10 
Upgrade moodle/moodle to 2.7.10
moodle/moodle fixed: 2.8.8 
Upgrade moodle/moodle to 2.8.8
moodle/moodle fixed: 2.9.2 
Upgrade moodle/moodle to 2.9.2
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-2015-5267, 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 2.7.10), 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-200: Exposure of Sensitive Information to an Unauthorized Actor, where the product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. 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

lib/moodlelib.php in Moodle through 2.6.11, 2.7.x before 2.7.10, 2.8.x before 2.8.8, and 2.9.x before 2.9.2 relies on the PHP mt_rand function to implement the random_string and complex_random_string functions, which makes it easier for remote attackers to predict password-recovery tokens via a brute-force approach.

CVE-2015-5267 Affected Moodle/moodle Versions

3 component(s)
Fixed Versions:
2.7.102.8.82.9.2
Product / Package Ecosystem Affected Versions Fixed Version
moodle/moodle
 Packagist
< 2.7.10
2.7.10
moodle/moodle
 Packagist
≥ 2.8.0
< 2.8.8
2.8.8
moodle/moodle
 Packagist
≥ 2.9.0
< 2.9.2
2.9.2

References

NVD — CVE-2015-5267 NVD
https://nvd.nist.gov/vuln/detail/CVE-2015-5267
Security Fix Commit FIX COMMIT
https://github.com/moodle/moodle/commit/289bc7f9e3022918b4cfd2cc9851472f0cea2896
Security Fix Commit FIX COMMIT
https://github.com/moodle/moodle/commit/5337b2295237958c93b6c65fa595859aaa7bf257
Security Fix Commit FIX COMMIT
https://github.com/moodle/moodle/commit/6e8224365ffcdf328458ea7852dc62574e806119
Security Fix Commit FIX COMMIT
https://github.com/moodle/moodle/commit/e4ac3879c2d1f8fe66caa74ff1544248bccef61e
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=320291
Moodle/moodle Security Information SECURITY
https://web.archive.org/web/20160323063809/http://www.securitytracker.com/id/1033619
git.moodle.org/gw WEB
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-50860
Moodle/moodle Security Information SECURITY
http://www.openwall.com/lists/oss-security/2015/09/21/1

Frequently Asked Questions

What is CVE-2015-5267?
CVE-2015-5267 is a security vulnerability in Moodle/moodle involving Moodle uses predictable password-recovery tokens under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor.
Which Moodle/moodle versions are affected?
Affected versions include releases prior to 2.7.10, 2.8.8, 2.9.2 across affected packages: moodle/moodle.
What version fixes CVE-2015-5267?
Upgrading to 2.7.10, 2.8.8, 2.9.2 (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 2.7.10, 2.8.8, 2.9.2. Upgrade your dependency to 2.7.10, 2.8.8, 2.9.2 or later.
What is the CVSS score of CVE-2015-5267?
CVE-2015-5267 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2015-5267?
CVE-2015-5267 is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor (The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.).
How can I check Packagist dependencies for CVE-2015-5267?
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 
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  "schema_version" : "1.4.0",
  "id" : "GHSA-382v-gxj9-ffhc",
  "modified" : "2024-01-26T18:11:42Z",
  "published" : "2022-05-13T01:12:47Z",
  "aliases" : [ "CVE-2015-5267" ],
  "summary" : "Moodle uses predictable password-recovery tokens",
  "details" : "lib/moodlelib.php in Moodle through 2.6.11, 2.7.x before 2.7.10, 2.8.x before 2.8.8, and 2.9.x before 2.9.2 relies on the PHP mt_rand function to implement the random_string and complex_random_string functions, which makes it easier for remote attackers to predict password-recovery tokens via a brute-force approach.",
  "severity" : [ {
    "type" : "CVSS_V3",
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    "type" : "WEB",
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  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/moodle/moodle"
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    "type" : "WEB",
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  }, {
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    "url" : "https://web.archive.org/web/20160323063809/http://www.securitytracker.com/id/1033619"
  }, {
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    "url" : "http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-50860"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2015/09/21/1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-01-26T18:11:42Z",
    "nvd_published_at" : "2016-02-22T05:59:00Z"
  }
}