CVE-2020-5840: Hashbrown cms Path Traversal Vulnerability

HIGH
Advisory Identifier: GHSA-q7hx-mrv5-6mrp
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CVSS 7.5
CWE-22
Published
Advisory Summary

CVE-2020-5840 is a HIGH (CVSS 7.5) path traversal vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Hashbrown cms libraries in the npm ecosystem. The issue involves hashbrown cms directory traversal. Remediation is available by upgrading affected packages to version 1.3.2.

CVE-2020-5840 at a Glance

CVE Identifier CVE-2020-5840
GHSA Identifier GHSA-q7hx-mrv5-6mrp
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Hashbrown cms
Package Ecosystem npm
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-2020-5840

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

hashbrown-cms fixed: 1.3.2 
npm install hashbrown-cms@1.3.2
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls hashbrown-cms

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2020-5840, inspect your project dependencies using npm:

npm ls hashbrown-cms

Analyze the terminal output to locate any version of Hashbrown cms in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.3.2), your application is affected.

Note: The npm ls hashbrown-cms command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. In Hashbrown cms, 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 HashBrown CMS before 1.3.2. `Server/Entity/Resource/Connection.js` allows an attacker to reach a parent directory via a crafted name or ID field.

CVE-2020-5840 Affected Hashbrown cms Versions

1 component(s)
Fixed Versions:
1.3.2
Product / Package Ecosystem Affected Versions Fixed Version
hashbrown-cms
npm/hashbrown-cms
npm
< 1.3.2
1.3.2

References

NVD — CVE-2020-5840 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-5840
Security Fix Commit FIX COMMIT
https://github.com/HashBrownCMS/hashbrown-cms/commit/6b37b73944447bb29c6aaeb086b04196d80c692a
Hashbrown cms Source Repository REPOSITORY
https://github.com/HashBrownCMS/hashbrown-cms
Hashbrown cms Source Repository REPOSITORY
https://github.com/HashBrownCMS/hashbrown-cms/compare/v1.3.1...v1.3.2
Hashbrown cms Release RELEASE
https://github.com/HashBrownCMS/hashbrown-cms/releases/tag/v1.3.2

Frequently Asked Questions

What is CVE-2020-5840?
CVE-2020-5840 is a security vulnerability in Hashbrown cms involving HashBrown CMS Directory Traversal under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Hashbrown cms versions are affected?
Affected versions include releases prior to 1.3.2 across affected packages: hashbrown-cms.
What version fixes CVE-2020-5840?
Upgrading to 1.3.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is hashbrown-cms affected?
Yes, hashbrown-cms is affected in releases prior to 1.3.2. Upgrade your dependency to 1.3.2 or later.
What is the CVSS score of CVE-2020-5840?
CVE-2020-5840 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-2020-5840?
CVE-2020-5840 is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.).
How can I check npm dependencies for CVE-2020-5840?
Run the dependency tree command: 'npm ls hashbrown-cms'. 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-q7hx-mrv5-6mrp",
  "modified" : "2023-07-13T17:08:04Z",
  "published" : "2022-05-24T17:05:42Z",
  "aliases" : [ "CVE-2020-5840" ],
  "summary" : "HashBrown CMS Directory Traversal",
  "details" : "An issue was discovered in HashBrown CMS before 1.3.2. `Server/Entity/Resource/Connection.js` allows an attacker to reach a parent directory via a crafted name or ID field.",
  "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" : "npm",
      "name" : "hashbrown-cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.3.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-5840"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/HashBrownCMS/hashbrown-cms/commit/6b37b73944447bb29c6aaeb086b04196d80c692a"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/HashBrownCMS/hashbrown-cms"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/HashBrownCMS/hashbrown-cms/compare/v1.3.1...v1.3.2"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/HashBrownCMS/hashbrown-cms/releases/tag/v1.3.2"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-07-13T17:08:04Z",
    "nvd_published_at" : "2020-01-06T18:15:00Z"
  }
}