CVE-2017-6924: Drupal/core Drupal REST API Can Bypass Vulnerability

HIGH
Advisory Identifier: GHSA-p8g6-5mg7-9r5q
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CVSS 7.4
CWE-269
Published
Advisory Summary

CVE-2017-6924 is a HIGH (CVSS 7.4) drupal rest api can bypass vulnerability (CWE-269: Improper Privilege Management) affecting Drupal/core libraries in the Packagist ecosystem. The issue involves drupal rest api can bypass comment approval. Remediation is available by upgrading affected packages to version 8.3.7.

CVE-2017-6924 at a Glance

CVE Identifier CVE-2017-6924
GHSA Identifier GHSA-p8g6-5mg7-9r5q
Severity HIGH
CVSS v3.1 Base Score 7.4
CWE Classification CWE-269: Improper Privilege Management
Affected Product Drupal/core
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 7.4

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2017-6924

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

drupal/core fixed: 8.3.7 
Upgrade drupal/core to 8.3.7
drupal/drupal fixed: 8.3.7 
Upgrade drupal/drupal to 8.3.7
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 drupal/core

How to Check if You Are Affected

To determine whether your application is affected by CVE-2017-6924, inspect your project dependencies for Drupal/core:

inspect dependencies for drupal/core

Analyze the terminal output to locate any version of Drupal/core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 8.3.7), 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-269: Improper Privilege Management, where the product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. In Drupal/core, 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

In Drupal 8 prior to 8.3.7; When using the REST API, users without the correct permission can post comments via REST that are approved even if the user does not have permission to post approved comments. This issue only affects sites that have the RESTful Web Services (rest) module enabled, the comment entity REST resource enabled, and where an attacker can access a user account on the site with permissions to post comments, or where anonymous users can post comments.

CVE-2017-6924 Affected Drupal/core Versions

2 component(s)
Fixed Versions:
8.3.7
Product / Package Ecosystem Affected Versions Fixed Version
drupal/core
 Packagist
≥ 8.0
< 8.3.7
8.3.7
drupal/drupal
 Packagist
≥ 8.0
< 8.3.7
8.3.7

References

NVD — CVE-2017-6924 NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-6924
Drupal/core Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2017-6924.yaml
Drupal/core Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2017-6924.yaml
Drupal/core Source Repository REPOSITORY
https://github.com/drupal/core
www.drupal.org/sa-core-2017-004 WEB
https://www.drupal.org/SA-CORE-2017-004
Drupal/core Security Information SECURITY
https://www.drupal.org/forum/newsletters/security-advisories-for-drupal-core/2017-08-16/drupal-core-multiple
Drupal/core Security Information SECURITY
http://www.securityfocus.com/bid/100368
Drupal/core Security Information SECURITY
http://www.securitytracker.com/id/1039200

Frequently Asked Questions

What is CVE-2017-6924?
CVE-2017-6924 is a security vulnerability in Drupal/core involving Drupal REST API can bypass comment approval under CWE-269: Improper Privilege Management.
Which Drupal/core versions are affected?
Affected versions include releases prior to 8.3.7 across affected packages: drupal/core, drupal/drupal.
What version fixes CVE-2017-6924?
Upgrading to 8.3.7 (or the latest patched release for your respective branch) resolves the vulnerability.
Is drupal/core affected?
Yes, drupal/core is affected in releases prior to 8.3.7. Upgrade your dependency to 8.3.7 or later.
Is drupal/drupal affected?
Yes, drupal/drupal is affected in releases prior to 8.3.7. Upgrade your dependency to 8.3.7 or later.
What is the CVSS score of CVE-2017-6924?
CVE-2017-6924 has a CVSS v3.1 base score of 7.4 (HIGH) with vector string CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.
What CWE is associated with CVE-2017-6924?
CVE-2017-6924 is classified under CWE-269: Improper Privilege Management (The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.).
How can I check Packagist dependencies for CVE-2017-6924?
Run the dependency tree command: 'inspect dependencies for drupal/core'. 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-p8g6-5mg7-9r5q",
  "modified" : "2024-04-23T22:32:43Z",
  "published" : "2022-05-13T01:36:23Z",
  "aliases" : [ "CVE-2017-6924" ],
  "summary" : "Drupal REST API can bypass comment approval",
  "details" : "In Drupal 8 prior to 8.3.7; When using the REST API, users without the correct permission can post comments via REST that are approved even if the user does not have permission to post approved comments. This issue only affects sites that have the RESTful Web Services (rest) module enabled, the comment entity REST resource enabled, and where an attacker can access a user account on the site with permissions to post comments, or where anonymous users can post comments.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "drupal/core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.0"
      }, {
        "fixed" : "8.3.7"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "drupal/drupal"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.0"
      }, {
        "fixed" : "8.3.7"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2017-6924"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2017-6924.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2017-6924.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/drupal/core"
  }, {
    "type" : "WEB",
    "url" : "https://www.drupal.org/SA-CORE-2017-004"
  }, {
    "type" : "WEB",
    "url" : "https://www.drupal.org/forum/newsletters/security-advisories-for-drupal-core/2017-08-16/drupal-core-multiple"
  }, {
    "type" : "WEB",
    "url" : "http://www.securityfocus.com/bid/100368"
  }, {
    "type" : "WEB",
    "url" : "http://www.securitytracker.com/id/1039200"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-269" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-04-23T22:32:43Z",
    "nvd_published_at" : "2019-01-15T20:29:00Z"
  }
}