CVE-2020-13664: Drupal/core Drupal Core Arbitrary PHP Code Vulnerability

HIGH
Advisory Identifier: GHSA-x72f-ggjw-v5xh
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CVSS 8.8
CWE-77
Published
Advisory Summary

CVE-2020-13664 is a HIGH (CVSS 8.8) drupal core arbitrary php code vulnerability (CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')) affecting Drupal/core libraries in the Packagist ecosystem. The issue involves drupal core arbitrary php code execution vulnerability. Remediation is available by upgrading affected packages to version 8.8.8, 8.9.1, 9.0.1.

CVE-2020-13664 at a Glance

CVE Identifier CVE-2020-13664
GHSA Identifier GHSA-x72f-ggjw-v5xh
Severity HIGH
CVSS v3.1 Base Score 8.8
CWE Classification CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')
Affected Product Drupal/core
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 8.8

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:R/S:U/C:H/I:H/A:H).

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

How to Fix CVE-2020-13664

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: 8.8.8 
Upgrade drupal/core to 8.8.8
drupal/core fixed: 8.9.1 
Upgrade drupal/core to 8.9.1
drupal/core fixed: 9.0.1 
Upgrade drupal/core to 9.0.1
drupal/drupal fixed: 8.8.8 
Upgrade drupal/drupal to 8.8.8
drupal/drupal fixed: 8.9.1 
Upgrade drupal/drupal to 8.9.1
drupal/drupal fixed: 9.0.1 
Upgrade drupal/drupal to 9.0.1
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-2020-13664, 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 8.8.8), 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-77: Improper Neutralization of Special Elements used in a Command ('Command Injection'), where the product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. 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

Arbitrary PHP code execution vulnerability in Drupal Core under certain circumstances. An attacker could trick an administrator into visiting a malicious site that could result in creating a carefully named directory on the file system. With this directory in place, an attacker could attempt to brute force a remote code execution vulnerability. Windows servers are most likely to be affected. This issue affects: Drupal Drupal Core 8.8.x versions prior to 8.8.8; 8.9.x versions prior to 8.9.1; 9.0.1 versions prior to 9.0.1.

CVE-2020-13664 Affected Drupal/core Versions

6 component(s)
Fixed Versions:
8.8.88.9.19.0.1
Product / Package Ecosystem Affected Versions Fixed Version
drupal/core
 Packagist
≥ 8.8.0
< 8.8.8
8.8.8
drupal/core
 Packagist
≥ 8.9.0
< 8.9.1
8.9.1
drupal/core
 Packagist
≥ 9.0.0
< 9.0.1
9.0.1
drupal/drupal
 Packagist
≥ 8.8.0
< 8.8.8
8.8.8
drupal/drupal
 Packagist
≥ 8.9.0
< 8.9.1
8.9.1
drupal/drupal
 Packagist
≥ 9.0.0
< 9.0.1
9.0.1

References

NVD — CVE-2020-13664 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-13664
Drupal/core Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2020-13664.yaml
Drupal/core Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2020-13664.yaml
Drupal/core Source Repository REPOSITORY
https://github.com/drupal/core
www.drupal.org/sa-core-2020-005 WEB
https://www.drupal.org/sa-core-2020-005

Frequently Asked Questions

What is CVE-2020-13664?
CVE-2020-13664 is a security vulnerability in Drupal/core involving Drupal Core Arbitrary PHP code execution vulnerability under CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection').
Which Drupal/core versions are affected?
Affected versions include releases prior to 8.8.8, 8.9.1, 9.0.1 across affected packages: drupal/core, drupal/drupal.
What version fixes CVE-2020-13664?
Upgrading to 8.8.8, 8.9.1, 9.0.1 (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 8.8.8, 8.9.1, 9.0.1. Upgrade your dependency to 8.8.8, 8.9.1, 9.0.1 or later.
Is drupal/drupal affected?
Yes, drupal/drupal is affected in releases prior to 8.8.8, 8.9.1, 9.0.1. Upgrade your dependency to 8.8.8, 8.9.1, 9.0.1 or later.
What is the CVSS score of CVE-2020-13664?
CVE-2020-13664 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2020-13664?
CVE-2020-13664 is classified under CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection') (The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.).
How can I check Packagist dependencies for CVE-2020-13664?
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-x72f-ggjw-v5xh",
  "modified" : "2024-04-23T22:30:38Z",
  "published" : "2022-05-24T17:49:27Z",
  "aliases" : [ "CVE-2020-13664" ],
  "summary" : "Drupal Core Arbitrary PHP code execution vulnerability",
  "details" : "Arbitrary PHP code execution vulnerability in Drupal Core under certain circumstances. An attacker could trick an administrator into visiting a malicious site that could result in creating a carefully named directory on the file system. With this directory in place, an attacker could attempt to brute force a remote code execution vulnerability. Windows servers are most likely to be affected. This issue affects: Drupal Drupal Core 8.8.x versions prior to 8.8.8; 8.9.x versions prior to 8.9.1; 9.0.1 versions prior to 9.0.1.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "drupal/core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.8.0"
      }, {
        "fixed" : "8.8.8"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "drupal/core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.9.0"
      }, {
        "fixed" : "8.9.1"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "drupal/core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "9.0.0"
      }, {
        "fixed" : "9.0.1"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "drupal/drupal"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.8.0"
      }, {
        "fixed" : "8.8.8"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "drupal/drupal"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.9.0"
      }, {
        "fixed" : "8.9.1"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "drupal/drupal"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "9.0.0"
      }, {
        "fixed" : "9.0.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-13664"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2020-13664.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2020-13664.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/drupal/core"
  }, {
    "type" : "WEB",
    "url" : "https://www.drupal.org/sa-core-2020-005"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-77" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-04-23T22:30:38Z",
    "nvd_published_at" : "2021-05-05T15:15:00Z"
  }
}