CVE-2020-13670: Drupal/core Remote Code Execution Vulnerability

HIGH
Advisory Identifier: GHSA-mmjr-5q74-p3m4
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CVSS 7.5
CWE-668
Published
Advisory Summary

CVE-2020-13670 is a HIGH (CVSS 7.5) remote code execution vulnerability (CWE-668: Exposure of Resource to Wrong Sphere) affecting Drupal/core libraries in the Packagist ecosystem. The issue involves exposure of resource to wrong sphere in drupal core. Remediation is available by upgrading affected packages to version 8.8.10, 8.9.6, 9.0.6.

CVE-2020-13670 at a Glance

CVE Identifier CVE-2020-13670
GHSA Identifier GHSA-mmjr-5q74-p3m4
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-668: Exposure of Resource to Wrong Sphere
Affected Product Drupal/core
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:3.1/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-2020-13670

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: 8.8.10 
Upgrade drupal/core to 8.8.10
drupal/core fixed: 8.9.6 
Upgrade drupal/core to 8.9.6
drupal/core fixed: 9.0.6 
Upgrade drupal/core to 9.0.6
drupal/drupal fixed: 8.8.10 
Upgrade drupal/drupal to 8.8.10
drupal/drupal fixed: 8.9.6 
Upgrade drupal/drupal to 8.9.6
drupal/drupal fixed: 9.0.6 
Upgrade drupal/drupal to 9.0.6
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-2020-13670, 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 8.8.10), 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-668: Exposure of Resource to Wrong Sphere, where the product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource. 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

Information Disclosure vulnerability in file module of Drupal Core allows an attacker to gain access to the file metadata of a permanent private file that they do not have access to by guessing the ID of the file. This issue affects: Drupal Core 8.8.x versions prior to 8.8.10; 8.9.x versions prior to 8.9.6; 9.0.x versions prior to 9.0.6.

CVE-2020-13670 Affected Drupal/core Versions

6 component(s)
Fixed Versions:
8.8.108.9.69.0.6
Product / Package Ecosystem Affected Versions Fixed Version
drupal/core
 Packagist
≥ 8.0.0
< 8.8.10
8.8.10
drupal/core
 Packagist
≥ 8.9.0
< 8.9.6
8.9.6
drupal/core
 Packagist
≥ 9.0.0
< 9.0.6
9.0.6
drupal/drupal
 Packagist
≥ 8.0.0
< 8.8.10
8.8.10
drupal/drupal
 Packagist
≥ 8.9.0
< 8.9.6
8.9.6
drupal/drupal
 Packagist
≥ 9.0.0
< 9.0.6
9.0.6

References

NVD — CVE-2020-13670 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-13670
Security Fix Commit FIX COMMIT
https://github.com/drupal/core/commit/f93a37b713b59f8d24e826bc74378099853eef3d
Drupal/core Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2020-13670.yaml
Drupal/core Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2020-13670.yaml
Drupal/core Source Repository REPOSITORY
https://github.com/drupal/core
www.drupal.org/sa-core-2020-011 WEB
https://www.drupal.org/sa-core-2020-011

Frequently Asked Questions

What is CVE-2020-13670?
CVE-2020-13670 is a security vulnerability in Drupal/core involving Exposure of Resource to Wrong Sphere in Drupal Core under CWE-668: Exposure of Resource to Wrong Sphere.
Which Drupal/core versions are affected?
Affected versions include releases prior to 8.8.10, 8.9.6, 9.0.6 across affected packages: drupal/core, drupal/drupal.
What version fixes CVE-2020-13670?
Upgrading to 8.8.10, 8.9.6, 9.0.6 (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 8.8.10, 8.9.6, 9.0.6. Upgrade your dependency to 8.8.10, 8.9.6, 9.0.6 or later.
Is drupal/drupal affected?
Yes, drupal/drupal is affected in releases prior to 8.8.10, 8.9.6, 9.0.6. Upgrade your dependency to 8.8.10, 8.9.6, 9.0.6 or later.
What is the CVSS score of CVE-2020-13670?
CVE-2020-13670 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2020-13670?
CVE-2020-13670 is classified under CWE-668: Exposure of Resource to Wrong Sphere (The product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource.).
How can I check Packagist dependencies for CVE-2020-13670?
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-mmjr-5q74-p3m4",
  "modified" : "2022-02-25T15:35:08Z",
  "published" : "2022-02-12T00:00:47Z",
  "aliases" : [ "CVE-2020-13670" ],
  "summary" : "Exposure of Resource to Wrong Sphere in Drupal Core",
  "details" : "Information Disclosure vulnerability in file module of Drupal Core allows an attacker to gain access to the file metadata of a permanent private file that they do not have access to by guessing the ID of the file. This issue affects: Drupal Core 8.8.x versions prior to 8.8.10; 8.9.x versions prior to 8.9.6; 9.0.x versions prior to 9.0.6.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "drupal/core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.0.0"
      }, {
        "fixed" : "8.8.10"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "drupal/core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.9.0"
      }, {
        "fixed" : "8.9.6"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "drupal/core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "9.0.0"
      }, {
        "fixed" : "9.0.6"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "drupal/drupal"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.0.0"
      }, {
        "fixed" : "8.8.10"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "drupal/drupal"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.9.0"
      }, {
        "fixed" : "8.9.6"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "drupal/drupal"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "9.0.0"
      }, {
        "fixed" : "9.0.6"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-13670"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/drupal/core/commit/f93a37b713b59f8d24e826bc74378099853eef3d"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2020-13670.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2020-13670.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/drupal/core"
  }, {
    "type" : "WEB",
    "url" : "https://www.drupal.org/sa-core-2020-011"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-668" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-02-25T15:35:08Z",
    "nvd_published_at" : "2022-02-11T16:15:00Z"
  }
}