CVE-2017-6922: Drupal/drupal Drupal Core Access Bypass Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-58f3-cx8p-h8jg
CVSS 6.5
CWE-552
Published
Advisory Summary

CVE-2017-6922 is a MODERATE (CVSS 6.5) drupal core access bypass vulnerability vulnerability (CWE-552: Files or Directories Accessible to External Parties) affecting Drupal/drupal libraries in the Packagist ecosystem. The issue involves drupal core access bypass vulnerability. Remediation is available by upgrading affected packages to version 7.56, 8.3.4.

CVE-2017-6922 at a Glance

CVE Identifier CVE-2017-6922
GHSA Identifier GHSA-58f3-cx8p-h8jg
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-552: Files or Directories Accessible to External Parties
Affected Product Drupal/drupal
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-2017-6922

To remediate this vulnerability, upgrade all affected Drupal/drupal 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/drupal fixed: 7.56
Upgrade drupal/drupal to 7.56
drupal/core fixed: 7.56
Upgrade drupal/core to 7.56
drupal/core fixed: 8.3.4
Upgrade drupal/core to 8.3.4
drupal/drupal fixed: 8.3.4
Upgrade drupal/drupal to 8.3.4
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/drupal

How to Check if You Are Affected

To determine whether your application is affected by CVE-2017-6922, inspect your project dependencies for Drupal/drupal:

inspect dependencies for drupal/drupal

Analyze the terminal output to locate any version of Drupal/drupal in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 7.56), 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-552: Files or Directories Accessible to External Parties, where the product makes files or directories accessible to unauthorized actors, even though they should not be. In Drupal/drupal, 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 core 8.x prior to 8.3.4 and Drupal core 7.x prior to 7.56; Private files that have been uploaded by an anonymous user but not permanently attached to content on the site should only be visible to the anonymous user that uploaded them, rather than all anonymous users. Drupal core did not previously provide this protection, allowing an access bypass vulnerability to occur. This issue is mitigated by the fact that in order to be affected, the site must allow anonymous users to upload files into a private file system.

CVE-2017-6922 Affected Drupal/drupal Versions

4 component(s)
Fixed Versions:
7.568.3.4
Product / Package Ecosystem Affected Versions Fixed Version
drupal/drupal
Packagist
≥ 7.0
< 7.56
7.56
drupal/core
Packagist
≥ 7.0
< 7.56
7.56
drupal/core
Packagist
≥ 8.0
< 8.3.4
8.3.4
drupal/drupal
Packagist
≥ 8.0
< 8.3.4
8.3.4

References

Frequently Asked Questions

What is CVE-2017-6922?
CVE-2017-6922 is a security vulnerability in Drupal/drupal involving Drupal core access bypass vulnerability under CWE-552: Files or Directories Accessible to External Parties.
Which Drupal/drupal versions are affected?
Affected versions include releases prior to 7.56, 8.3.4 across affected packages: drupal/drupal, drupal/core.
What version fixes CVE-2017-6922?
Upgrading to 7.56, 8.3.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is drupal/drupal affected?
Yes, drupal/drupal is affected in releases prior to 7.56, 8.3.4. Upgrade your dependency to 7.56, 8.3.4 or later.
Is drupal/core affected?
Yes, drupal/core is affected in releases prior to 7.56, 8.3.4. Upgrade your dependency to 7.56, 8.3.4 or later.
What is the CVSS score of CVE-2017-6922?
CVE-2017-6922 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-2017-6922?
CVE-2017-6922 is classified under CWE-552: Files or Directories Accessible to External Parties (The product makes files or directories accessible to unauthorized actors, even though they should not be.).
How can I check Packagist dependencies for CVE-2017-6922?
Run the dependency tree command: 'inspect dependencies for drupal/drupal'. 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
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-58f3-cx8p-h8jg",
  "modified" : "2024-04-23T22:30:57Z",
  "published" : "2022-05-13T01:36:23Z",
  "aliases" : [ "CVE-2017-6922" ],
  "summary" : "Drupal core access bypass vulnerability",
  "details" : "In Drupal core 8.x prior to 8.3.4 and Drupal core 7.x prior to 7.56; Private files that have been uploaded by an anonymous user but not permanently attached to content on the site should only be visible to the anonymous user that uploaded them, rather than all anonymous users. Drupal core did not previously provide this protection, allowing an access bypass vulnerability to occur. This issue is mitigated by the fact that in order to be affected, the site must allow anonymous users to upload files into a private file system.",
  "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" : "7.0"
      }, {
        "fixed" : "7.56"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "drupal/core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.0"
      }, {
        "fixed" : "8.3.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "drupal/drupal"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.0"
      }, {
        "fixed" : "8.3.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "drupal/drupal"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "7.0"
      }, {
        "fixed" : "7.56"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2017-6922"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2017-6922.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2017-6922.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/drupal/core"
  }, {
    "type" : "WEB",
    "url" : "https://www.debian.org/security/2017/dsa-3897"
  }, {
    "type" : "WEB",
    "url" : "https://www.drupal.org/SA-CORE-2017-003"
  }, {
    "type" : "WEB",
    "url" : "https://www.drupal.org/forum/newsletters/security-advisories-for-drupal-core/2017-06-21/drupal-core-multiple"
  }, {
    "type" : "WEB",
    "url" : "http://www.securityfocus.com/bid/99219"
  }, {
    "type" : "WEB",
    "url" : "http://www.securitytracker.com/id/1038781"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-552" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-04-23T22:30:57Z",
    "nvd_published_at" : "2019-01-22T15:29:00Z"
  }
}