CVE-2017-6923: Drupal/core Missing Authorization Vulnerability

MODERATE
Advisory Identifier: GHSA-v3f6-f29f-rgvp
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CVSS 6.5
CWE-862
Published
Advisory Summary

CVE-2017-6923 is a MODERATE (CVSS 6.5) missing authorization vulnerability (CWE-862: Missing Authorization) affecting Drupal/core libraries in the Packagist ecosystem. The issue involves missing authorization in drupal. Remediation is available by upgrading affected packages to version 8.3.7.

CVE-2017-6923 at a Glance

CVE Identifier CVE-2017-6923
GHSA Identifier GHSA-v3f6-f29f-rgvp
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-862: Missing Authorization
Affected Product Drupal/core
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 6.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/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 High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2017-6923

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-2017-6923, 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-862: Missing Authorization, where the product does not perform an authorization check when an actor attempts to access a resource or perform an action. 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.x prior to 8.3.7 When creating a view, you can optionally use Ajax to update the displayed data via filter parameters. The views subsystem/module did not restrict access to the Ajax endpoint to only views configured to use Ajax. This is mitigated if you have access restrictions on the view. It is best practice to always include some form of access restrictions on all views, even if you are using another module to display them.

CVE-2017-6923 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-2017-6923 NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-6923
Drupal/core Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2017-6923.yaml
Drupal/core Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2017-6923.yaml
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-2017-6923?
CVE-2017-6923 is a security vulnerability in Drupal/core involving Missing Authorization in Drupal under CWE-862: Missing Authorization.
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-2017-6923?
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-2017-6923?
CVE-2017-6923 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2017-6923?
CVE-2017-6923 is classified under CWE-862: Missing Authorization (The product does not perform an authorization check when an actor attempts to access a resource or perform an action.).
How can I check Packagist dependencies for CVE-2017-6923?
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-v3f6-f29f-rgvp",
  "modified" : "2021-08-18T21:44:06Z",
  "published" : "2019-10-10T19:31:31Z",
  "aliases" : [ "CVE-2017-6923" ],
  "summary" : "Missing Authorization in Drupal",
  "details" : "In Drupal 8.x prior to 8.3.7 When creating a view, you can optionally use Ajax to update the displayed data via filter parameters. The views subsystem/module did not restrict access to the Ajax endpoint to only views configured to use Ajax. This is mitigated if you have access restrictions on the view. It is best practice to always include some form of access restrictions on all views, even if you are using another module to display them.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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-2017-6923"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2017-6923.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2017-6923.yaml"
  }, {
    "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-862" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2019-10-10T19:30:05Z",
    "nvd_published_at" : "2019-01-22T15:29:00Z"
  }
}