CVE-2014-7847: Moodle/moodle Denial of Service Vulnerability

MODERATE
Advisory Identifier: GHSA-6vjg-2q57-rgfw
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Advisory Summary

CVE-2014-7847 is a MODERATE denial of service vulnerability (General Security Weakness) affecting Moodle/moodle libraries in the Packagist ecosystem. The issue involves moodle allows attackers to cause a denial of service. Remediation is available by upgrading affected packages to version 2.5.9, 2.6.6, 2.7.3.

CVE-2014-7847 at a Glance

CVE Identifier CVE-2014-7847
GHSA Identifier GHSA-6vjg-2q57-rgfw
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification General Security Weakness
Affected Product Moodle/moodle
Package Ecosystem Packagist
Published Date
Last Updated

How to Fix CVE-2014-7847

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: 2.5.9 
Upgrade moodle/moodle to 2.5.9
moodle/moodle fixed: 2.6.6 
Upgrade moodle/moodle to 2.6.6
moodle/moodle fixed: 2.7.3 
Upgrade moodle/moodle to 2.7.3
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-2014-7847, 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 2.5.9), 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 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

iplookup/index.php in Moodle through 2.4.11, 2.5.x before 2.5.9, 2.6.x before 2.6.6, and 2.7.x before 2.7.3 allows remote attackers to cause a denial of service (resource consumption) by triggering the calculation of an estimated latitude and longitude for an IP address.

CVE-2014-7847 Affected Moodle/moodle Versions

3 component(s)
Fixed Versions:
2.5.92.6.62.7.3
Product / Package Ecosystem Affected Versions Fixed Version
moodle/moodle
 Packagist
< 2.5.9
2.5.9
moodle/moodle
 Packagist
≥ 2.6.0
< 2.6.6
2.6.6
moodle/moodle
 Packagist
≥ 2.7.0
< 2.7.3
2.7.3

References

NVD — CVE-2014-7847 NVD
https://nvd.nist.gov/vuln/detail/CVE-2014-7847
Security Fix Commit FIX COMMIT
https://github.com/moodle/moodle/commit/324b018bbce2f56198fe8808968bad6c8798710a
Security Fix Commit FIX COMMIT
https://github.com/moodle/moodle/commit/35a60cbb382d78ddb9d54c772816db4c5007ca7e
Security Fix Commit FIX COMMIT
https://github.com/moodle/moodle/commit/6ec47a64acf8576916c20dcbb436b0ae41a63440
Security Fix Commit FIX COMMIT
https://github.com/moodle/moodle/commit/eb46bf2f4e80f4421255f6aee00b73448ba582a7
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=275158
Moodle/moodle Security Information SECURITY
https://web.archive.org/web/20150914064838/http://www.securitytracker.com/id/1031215
git.moodle.org/gw WEB
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-47321
Moodle/moodle Security Information SECURITY
http://openwall.com/lists/oss-security/2014/11/17/11

Frequently Asked Questions

What is CVE-2014-7847?
CVE-2014-7847 is a security vulnerability in Moodle/moodle involving Moodle allows attackers to cause a denial of service under General Security Weakness.
Which Moodle/moodle versions are affected?
Affected versions include releases prior to 2.5.9, 2.6.6, 2.7.3 across affected packages: moodle/moodle.
What version fixes CVE-2014-7847?
Upgrading to 2.5.9, 2.6.6, 2.7.3 (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 2.5.9, 2.6.6, 2.7.3. Upgrade your dependency to 2.5.9, 2.6.6, 2.7.3 or later.
What CWE is associated with CVE-2014-7847?
CVE-2014-7847 is classified under General Security Weakness.
How can I check Packagist dependencies for CVE-2014-7847?
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-6vjg-2q57-rgfw",
  "modified" : "2024-01-24T21:42:34Z",
  "published" : "2022-05-13T01:12:43Z",
  "aliases" : [ "CVE-2014-7847" ],
  "summary" : "Moodle allows attackers to cause a denial of service",
  "details" : "iplookup/index.php in Moodle through 2.4.11, 2.5.x before 2.5.9, 2.6.x before 2.6.6, and 2.7.x before 2.7.3 allows remote attackers to cause a denial of service (resource consumption) by triggering the calculation of an estimated latitude and longitude for an IP address.",
  "severity" : [ ],
  "affected" : [ {
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      "ecosystem" : "Packagist",
      "name" : "moodle/moodle"
    },
    "ranges" : [ {
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      "events" : [ {
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      }, {
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      } ]
    } ]
  }, {
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  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2014-7847"
  }, {
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    "type" : "WEB",
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  }, {
    "type" : "WEB",
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  }, {
    "type" : "WEB",
    "url" : "https://web.archive.org/web/20150914064838/http://www.securitytracker.com/id/1031215"
  }, {
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    "url" : "http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-47321"
  }, {
    "type" : "WEB",
    "url" : "http://openwall.com/lists/oss-security/2014/11/17/11"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-01-24T21:42:34Z",
    "nvd_published_at" : "2014-11-24T11:59:00Z"
  }
}