CVE-2020-24941: Laravel/framework Improper Input Validation Vulnerability

HIGH
Advisory Identifier: GHSA-w68r-5p45-5rqp
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CVSS 7.5
CWE-863
Published
Advisory Summary

CVE-2020-24941 is a HIGH (CVSS 7.5) improper input validation vulnerability (CWE-863: Incorrect Authorization) affecting Laravel/framework libraries in the Packagist ecosystem. The issue involves improper input validation in laravel. Remediation is available by upgrading affected packages to version 6.18.35, 7.24.0.

CVE-2020-24941 at a Glance

CVE Identifier CVE-2020-24941
GHSA Identifier GHSA-w68r-5p45-5rqp
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-863: Incorrect Authorization
Affected Product Laravel/framework
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:N/I:H/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 None (C:N)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2020-24941

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

laravel/framework fixed: 6.18.35 
Upgrade laravel/framework to 6.18.35
laravel/framework fixed: 7.24.0 
Upgrade laravel/framework to 7.24.0
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 laravel/framework

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-24941, inspect your project dependencies for Laravel/framework:

inspect dependencies for laravel/framework

Analyze the terminal output to locate any version of Laravel/framework in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 6.18.35), 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-863: Incorrect Authorization, where the product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. In Laravel/framework, 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

An issue was discovered in Laravel before 6.18.35 and 7.x before 7.24.0. The $guarded property is mishandled in some situations involving requests with JSON column nesting expressions.

CVE-2020-24941 Affected Laravel/framework Versions

2 component(s)
Fixed Versions:
6.18.357.24.0
Product / Package Ecosystem Affected Versions Fixed Version
laravel/framework
 Packagist
< 6.18.35
6.18.35
laravel/framework
 Packagist
≥ 7.0.0
< 7.24.0
7.24.0

References

NVD — CVE-2020-24941 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-24941
Security Fix Commit FIX COMMIT
https://github.com/laravel/framework/commit/897d107775737a958dbd0b2f3ea37877c7526371
Laravel/framework Release RELEASE
https://blog.laravel.com/security-release-laravel-61835-7240

Frequently Asked Questions

What is CVE-2020-24941?
CVE-2020-24941 is a security vulnerability in Laravel/framework involving Improper Input Validation in Laravel under CWE-863: Incorrect Authorization.
Which Laravel/framework versions are affected?
Affected versions include releases prior to 6.18.35, 7.24.0 across affected packages: laravel/framework.
What version fixes CVE-2020-24941?
Upgrading to 6.18.35, 7.24.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is laravel/framework affected?
Yes, laravel/framework is affected in releases prior to 6.18.35, 7.24.0. Upgrade your dependency to 6.18.35, 7.24.0 or later.
What is the CVSS score of CVE-2020-24941?
CVE-2020-24941 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:N/I:H/A:N.
What CWE is associated with CVE-2020-24941?
CVE-2020-24941 is classified under CWE-863: Incorrect Authorization (The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.).
How can I check Packagist dependencies for CVE-2020-24941?
Run the dependency tree command: 'inspect dependencies for laravel/framework'. 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-w68r-5p45-5rqp",
  "modified" : "2021-05-04T22:46:50Z",
  "published" : "2021-05-06T18:54:20Z",
  "aliases" : [ "CVE-2020-24941" ],
  "summary" : "Improper Input Validation in Laravel",
  "details" : "An issue was discovered in Laravel before 6.18.35 and 7.x before 7.24.0. The $guarded property is mishandled in some situations involving requests with JSON column nesting expressions.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "laravel/framework"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "6.18.35"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "laravel/framework"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "7.0.0"
      }, {
        "fixed" : "7.24.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-24941"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/laravel/framework/commit/897d107775737a958dbd0b2f3ea37877c7526371"
  }, {
    "type" : "WEB",
    "url" : "https://blog.laravel.com/security-release-laravel-61835-7240"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-863" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-05-04T22:46:50Z",
    "nvd_published_at" : "2020-09-04T02:15:00Z"
  }
}